Document And Entity Information - shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2018 |
Oct. 19, 2018 |
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| Document Information [Line Items] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Sep. 30, 2018 | |
| Document Fiscal Year Focus | 2018 | |
| Document Fiscal Period Focus | Q3 | |
| Trading Symbol | unt | |
| Entity Registrant Name | UNIT CORP | |
| Entity Central Index Key | 0000798949 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Entity Common Stock, Shares Outstanding | 54,058,016 |
| X | ||||||||||
- Definition If the value is true, then the document is an amendment to previously-filed/accepted document. No definition available.
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| X | ||||||||||
- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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| X | ||||||||||
- Definition This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY. No definition available.
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| X | ||||||||||
- Definition This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. No definition available.
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| X | ||||||||||
- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other". No definition available.
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- Definition A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. No definition available.
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| X | ||||||||||
- Definition Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated) or (5) Smaller Reporting Accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure. No definition available.
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- Definition The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Trading symbol of an instrument as listed on an exchange. No definition available.
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Condensed Consolidated Balance Sheets (Unaudited) - USD ($) |
Sep. 30, 2018 |
Dec. 31, 2017 |
|||
|---|---|---|---|---|---|
| Current assets: | |||||
| Cash and cash equivalents | $ 91,557,000 | $ 701,000 | |||
| Accounts receivable, net of allowance for doubtful accounts of $2,450 at both September 30, 2018 and December 31, 2017, respectively | 122,123,000 | 111,512,000 | |||
| Materials and supplies | 505,000 | 505,000 | |||
| Current derivative asset (Note 10) | 0 | 721,000 | |||
| Prepaid expenses and other | 9,419,000 | 6,233,000 | |||
| Total current assets | 223,604,000 | 119,672,000 | |||
| Oil and natural gas properties on the full cost method: | |||||
| Proved properties | 5,901,661,000 | 5,712,813,000 | |||
| Unproved properties not being amortized | 332,886,000 | 296,764,000 | |||
| Drilling equipment | 1,632,540,000 | 1,593,611,000 | |||
| Gas gathering and processing equipment | 751,715,000 | 726,236,000 | |||
| Saltwater disposal systems | 67,074,000 | 62,618,000 | |||
| Corporate land and building | 59,081,000 | 59,080,000 | |||
| Transportation equipment | 29,103,000 | 29,631,000 | |||
| Other | 56,750,000 | 53,439,000 | |||
| Property, plant, and equipment, gross | 8,830,810,000 | 8,534,192,000 | |||
| Less accumulated depreciation, depletion, amortization, and impairment | 6,325,160,000 | 6,151,450,000 | |||
| Net property and equipment | 2,505,650,000 | 2,382,742,000 | |||
| Goodwill | 62,808,000 | 62,808,000 | |||
| Other assets | 28,703,000 | 16,230,000 | |||
| Total assets | 2,820,765,000 | [1] | 2,581,452,000 | ||
| Current liabilities: | |||||
| Accounts payable | 143,552,000 | 112,648,000 | |||
| Accrued liabilities (Note 5) | 67,743,000 | 48,523,000 | |||
| Income taxes payable | 1,051,000 | 0 | |||
| Current derivative liability (Note 10) | 13,067,000 | 7,763,000 | |||
| Current portion of other long-term liabilities (Note 6) | 14,150,000 | 13,002,000 | |||
| Total current liabilities | 239,563,000 | 181,936,000 | |||
| Long-term debt less debt issuance costs (Note 6) | 643,921,000 | 820,276,000 | |||
| Non-current derivative liability (Note 10) | 1,542,000 | 0 | |||
| Other long-term liabilities (Note 6) | 101,410,000 | 100,203,000 | |||
| Deferred income taxes | 164,964,000 | 133,477,000 | |||
| Commitments and contingencies (Note 12) | 0 | 0 | |||
| Shareholders' equity: | |||||
| Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued | 0 | 0 | |||
| Common stock, $.20 par value, 175,000,000 shares authorized, 54,063,705 and 52,880,134 shares issued as of September 30, 2018 and December 31, 2017, respectively | 10,414,000 | 10,280,000 | |||
| Capital in excess of par value | 626,746,000 | 535,815,000 | |||
| Accumulated other comprehensive income (loss) (Note 14) | (103,000) | 63,000 | |||
| Retained earnings | 830,680,000 | 799,402,000 | |||
| Total shareholders’ equity attributable to Unit Corporation | 1,467,737,000 | 1,345,560,000 | |||
| Non-controlling interests in consolidated subsidiaries | 201,628,000 | 0 | |||
| Total shareholders' equity | 1,669,365,000 | 1,345,560,000 | |||
| Total liabilities and shareholders' equity | $ 2,820,765,000 | [1] | $ 2,581,452,000 | ||
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| X | ||||||||||
- Definition Natural gas gathering systems and treating plants. No definition available.
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| X | ||||||||||
- Definition Saltwater disposal systems No definition available.
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Capitalized costs incurred for support equipment and facilities used in oil and gas producing activities (such as seismic equipment, drilling equipment, construction and grading equipment, vehicles, repair shops, warehouses, supply points, camps, and division, district, or field offices). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accounts receivable, allowance for doubtful accounts | $ 2,450 | $ 2,450 |
| Preferred stock, par value | $ 1.00 | $ 1.00 |
| Preferred stock, shares authorized | 5,000,000 | 5,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Common stock, par value | $ 0.20 | $ 0.20 |
| Common stock, shares authorized | 175,000,000 | 175,000,000 |
| Common stock, shares issued | 54,063,705 | 52,880,134 |
| VIE Current Assets Pledged | $ 41,786 | |
| VIE Non-current Assets Pledged | 416,714 | |
| VIE Current Liabilities, No Recourse | 38,593 | |
| VIE Non-current Liabilities, No Recourse | $ 16,126 |
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of consolidated variable interest entity's (VIE) assets that can only be used to settle obligations of the VIE, classified as current. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of consolidated variable interest entity's (VIE) assets that can only be used to settle obligations of VIE, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of consolidated variable interest entity's (VIE) liabilities that do not have recourse to general credit of primary beneficiary, classified as current. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of consolidated variable interest entity's (VIE) liabilities that do not have recourse to general credit of primary beneficiary, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Condensed Consolidated Income Statements (Unaudited) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Revenues: | ||||
| Oil and natural gas | $ 111,623 | $ 85,470 | $ 317,040 | $ 256,241 |
| Contract drilling | 50,612 | 51,619 | 143,527 | 128,059 |
| Gas gathering and processing | 57,823 | 51,399 | 167,926 | 150,493 |
| Total revenues | 220,058 | 188,488 | 628,493 | 534,793 |
| Operating costs: | ||||
| Oil and natural gas | 32,139 | 33,911 | 100,519 | 95,873 |
| Contract drilling | 32,032 | 34,747 | 95,593 | 91,213 |
| Gas gathering and processing | 43,134 | 38,116 | 124,441 | 111,862 |
| Total operating costs | 107,305 | 106,774 | 320,553 | 298,948 |
| Depreciation, depletion, and amortization | 63,537 | 54,533 | 178,976 | 151,545 |
| General and administrative | 9,278 | 9,235 | 28,752 | 26,902 |
| Gain on disposition of assets | (253) | (81) | (575) | (1,153) |
| Total operating expenses | 179,867 | 170,461 | 527,706 | 476,242 |
| Income from operations | 40,191 | 18,027 | 100,787 | 58,551 |
| Other income (expense): | ||||
| Interest, net | (7,945) | (9,944) | (25,678) | (28,807) |
| Gain (loss) on derivatives | (4,385) | (2,614) | (25,608) | 21,019 |
| Other, net | 6 | 5 | 17 | 14 |
| Total other income (expense) | (12,324) | (12,553) | (51,269) | (7,774) |
| Income before income taxes | 27,867 | 5,474 | 49,518 | 50,777 |
| Income tax expense: | ||||
| Deferred | 6,744 | 1,769 | 12,380 | 22,084 |
| Total income taxes | 6,744 | 1,769 | 12,380 | 22,084 |
| Net income | 21,123 | 3,705 | 37,138 | 28,693 |
| Net income attributable to non-controlling interest | 2,224 | 0 | 4,586 | 0 |
| Net income attributable to Unit Corporation | $ 18,899 | $ 3,705 | $ 32,552 | $ 28,693 |
| Net income attributable to Unit Corporation per common share: | ||||
| Basic | $ 0.36 | $ 0.07 | $ 0.63 | $ 0.56 |
| Diluted | $ 0.36 | $ 0.07 | $ 0.62 | $ 0.56 |
| X | ||||||||||
- Definition Costs of generating revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period. No definition available.
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| X | ||||||||||
- Definition Total costs of sales and operating expenses for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Cost incurred related to the gas activities, such as transportation, marketing and processing crude oil, natural gas and refined petroleum products. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Revenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Costs incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Aggregate revenue during the period related to oil and gas business activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Net income | $ 21,123 | $ 3,705 | $ 37,138 | $ 28,693 |
| Other comprehensive income (loss), net of taxes: | ||||
| Unrealized gain (loss) on securities, net of tax of ($13), $20, ($60) and $32 | (38) | 33 | (179) | 53 |
| Comprehensive income | 21,085 | 3,738 | 36,959 | 28,746 |
| Less: Comprehensive income attributable to non-controlling interest | 2,224 | 0 | 4,586 | 0 |
| Comprehensive income attributable to Unit Corporation | $ 18,861 | $ 3,738 | $ 32,373 | $ 28,746 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount after tax of other comprehensive income (loss) attributable to noncontrolling interests. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Unrealized income (loss) on securities, tax | $ (13) | $ 20 | $ (60) | $ 32 |
| X | ||||||||||
- Definition Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands |
Total |
Common Stock [Member] |
Capital In Excess of Par Value [Member] |
Accumulated other comprehensive income [Member] |
Retained earnings [Member] |
Non-controlling interests in consolidated subsidiaries [Member] |
|---|---|---|---|---|---|---|
| Stockholders' equity, beginning balance at Dec. 31, 2016 | $ 1,194,070 | $ 10,016 | $ 502,500 | $ 0 | $ 681,554 | $ 0 |
| Net Income | 28,693 | 0 | 0 | 0 | 28,693 | 0 |
| Other comprehensive income (loss) | 53 | 0 | 0 | 53 | 0 | 0 |
| Total comprehensive income | 28,746 | |||||
| Activity in employee compensation plans | 29,089 | 261 | 28,828 | 0 | 0 | 0 |
| Stockholders' equity, ending balance at Sep. 30, 2017 | 1,251,905 | 10,277 | 531,328 | 53 | 710,247 | 0 |
| Cumulative effect adjustment for adoption of ASUs (Notes 1 and 2) | (1,261) | 0 | 0 | 13 | (1,274) | 0 |
| Stockholders' equity, beginning balance at Dec. 31, 2017 | 1,345,560 | 10,280 | 535,815 | 63 | 799,402 | 0 |
| Net Income | 37,138 | 0 | 0 | 0 | 32,552 | 4,586 |
| Other comprehensive income (loss) | (179) | 0 | 0 | (179) | 0 | 0 |
| Total comprehensive income | 36,959 | |||||
| Contributions | 300,000 | 0 | 102,958 | 0 | 0 | 197,042 |
| Transaction costs associated with sale of non-controlling interest | (2,303) | 0 | (2,303) | 0 | 0 | 0 |
| Tax effect of sale on non-controlling interest | (24,300) | 0 | (24,300) | 0 | 0 | 0 |
| Activity in employee compensation plans | 14,710 | 134 | 14,576 | 0 | 0 | 0 |
| Stockholders' equity, ending balance at Sep. 30, 2018 | $ 1,669,365 | $ 10,414 | $ 626,746 | $ (103) | $ 830,680 | $ 201,628 |
| X | ||||||||||
- Definition Tax effect of sale on non-controlling interest No definition available.
|
| X | ||||||||||
- Definition Amount of other increase (decrease) in additional paid in capital (APIC). No definition available.
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. No definition available.
|
| X | ||||||||||
- Definition Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Value, after forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - shares shares in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Statement of Stockholders' Equity [Abstract] | ||
| Activity in employee compensation plans (shares) | 1,183,571 | 1,385,342 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Cash paid during the year for: No definition available.
|
| X | ||||||||||
- Definition Change in Asset Retirement Obligations Through Non-Cash Transaction either through non-cash settlements or revision of estimates No definition available.
|
| X | ||||||||||
- Definition Derivative Instruments Not Designated Amount Paid (Received) During Period No definition available.
|
| X | ||||||||||
- Definition IncreaseDecreaseInAccountsPayableRelatedToPurchasesOfPropertyPlantAndEquipment No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of amortization expense attributable to debt discount (premium) and debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets utilized in financial service operations. No definition available.
|
| X | ||||||||||
- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in income taxes receivable, which represents the amount due from tax authorities for refunds of overpayments or recoveries of income taxes paid. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash paid, after deduction of cash paid for capitalized interest, for interest. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash (inflow) outflow from investing activities classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net cash inflow or outflow from the excess drawing from an existing cash balance, which will be honored by the bank but reflected as a loan to the drawer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Basis of Preparation and Presentation |
9 Months Ended | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 | |||||||||||||||||||||
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||||||||||||||||||
| Basis of Preparation and Presentation | BASIS OF PREPARATION AND PRESENTATION The unaudited condensed consolidated financial statements in this report include the accounts of Unit Corporation and all its subsidiaries and affiliates and have been prepared under the rules and regulations of the SEC. The terms “company,” “Unit,” “we,” “our,” “us,” or like terms refer to Unit Corporation, a Delaware corporation, and one or more of its subsidiaries and affiliates, except as otherwise indicated or as the context otherwise requires. We consolidate the activities of Superior Pipeline Company, L.L.C. (Superior), a 50/50 joint venture between Unit Corporation and SP Investor Holdings, LLC, which qualifies as a VIE under generally accepted accounting principles in the United States (GAAP). We have concluded that we are the primary beneficiary of the VIE, as defined in the accounting standards, since we have the power, through our 50% ownership, to direct those activities that most significantly affect the economic performance of Superior as further described in Note 13 – Variable Interest Entity Arrangements. The condensed consolidated financial statements are unaudited and do not include all the notes in our annual financial statements. This report should be read with the audited consolidated financial statements and notes in our Form 10-K, filed February 27, 2018, for the year ended December 31, 2017 as amended by our Form 10-K/A filed on August 6, 2018. In the opinion of our management, the unaudited condensed consolidated financial statements contain all normal recurring adjustments (including the elimination of all intercompany transactions) necessary to fairly state:
Our financial statements are prepared in conformity with GAAP, which requires us to make certain estimates and assumptions that may affect the amounts reported in our unaudited condensed consolidated financial statements and notes. Actual results may differ from those estimates. Results for the nine months ended September 30, 2018 and 2017 are not necessarily indicative of the results we may realize for the full year of 2018, or that we realized for the full year of 2017. Accounting Changes - Recent Accounting Pronouncements - Adopted As of January 1, 2018, we adopted ASU 2018-02 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This standard is explained further in Note 8 - New Accounting Pronouncements. We adopted this amendment early and it had no material effect to our financial statements. We previously used 37.75% to calculate the tax effect on AOCI and we now use 24.5%. This change is reflected in our Unaudited Condensed Consolidated Statements of Comprehensive Income and in Note 14 - Equity. Also, as of January 1, 2018, we adopted ASU 2014-09 Revenue from Contracts with Customers - Topic 606 (ASC 606) and all later amendments that modified ASC 606. This new revenue standard is explained further in Note 8 – New Accounting Pronouncements. We elected to apply this standard on the modified retrospective approach method to contracts not completed as of January 1, 2018, where the cumulative effect on adoption, which only affected our mid-stream segment, is recognized as an adjustment to opening retained earnings at January 1, 2018. This adjustment related to the timing of revenue recognition for certain demand fees. Our oil and natural gas and contract drilling segments had no retained earnings adjustment. Comparative prior periods have not been adjusted and continue to be reported under ASC 605. The additional disclosures required by the ASU are included in Note 2 – Revenue from Contracts with Customers. |
| X | ||||||||||
- Definition The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
Revenue from Contracts with Customers |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Revenue from Contract with Customer | REVENUE FROM CONTRACTS WITH CUSTOMERS Our revenue streams are reported under three segments: oil and natural gas, contract drilling, and mid-stream. This is our disaggregation of revenue and how our segment revenue is reported (as reflected in Note 15 – Industry Segment Information). Revenue from the oil and natural gas segment is derived from sales of our oil and natural gas production. Revenue from the contract drilling segment is derived by contracting with upstream companies to drill an agreed-on number of wells or provide drilling rigs and services over an agreed-on time period. Revenue from the mid-stream segment is derived from gathering, transporting, and processing natural gas production and selling those commodities. We sell the hydrocarbons (from the oil and natural gas and mid-stream segments) to mid-stream and downstream oil and gas companies. We satisfy the performance obligation under each segment's contracts as follows: for the contract drilling and mid-stream contracts, we satisfy the performance obligation over the agreed-on time within the contracts, and for oil and natural gas contracts, we satisfy the performance obligation with each delivery of volumes. For oil and natural gas contracts, as it is more feasible, we account for these deliveries monthly. Per the contracts for all segments, customers pay for the services/goods received monthly within an agreed on number of days following the end of the month. Besides the mid-stream demand fees discussed further below, there were no other contract assets or liabilities falling within the scope of this accounting pronouncement. Oil and Natural Gas Contracts, Revenues, Implementation Impact to Retained Earnings, and Performance Obligations Typical types of revenue contracts signed by our segments are Oil Sales Contracts, Gas Purchase Agreements, North American Energy Standards Board (NAESB) Contracts, Gas Gathering and Processing Agreements, and revenues earned as the non-operated party with the operator serving as an agent on our behalf under our Joint Operating Agreements. Contract term can range from a single month to a term spanning a decade or more; some may also include evergreen provisions. Revenues from sales we make are recognized when our customer obtains control of the sold product. For sales to other mid-stream and downstream oil and gas companies, this would occur at a point in time, typically on delivery to the customer. Sales generated from our non-operated interest are recorded based on the information obtained from the operator. Our adoption of this standard required no adjustment to opening retained earnings. Certain costs—as either a deduction from revenue or as an expense—is determined based on when control of the commodity is transferred to our customer, which would affect our total revenue recognized, but will not affect gross profit. For example, gathering, processing and transportation costs included as part of the contract price with the customer on transfer of control of the commodity are included in the transaction price, while costs incurred while we are in control of the commodity represent operating costs. The impact of the adoption of ASC 606 did not impact income from operations or net income for the three or nine months ended September 30, 2018. These tables summarize the impact of the adoption of ASC 606 on revenue and operating costs for the three and nine months ended September 30, 2018, respectively:
Our performance obligation for all commodity contracts is the delivery of oil and gas volumes to the customer. Typically, the contract is for a specified period (for example, a month or a year); however, each delivery under that contract can be considered separately identifiable since each delivery provides benefits to the customer on its own. For feasibility, as accounting for a monthly performance obligation is not materially different than identifying a more granular performance obligation, we conclude this performance obligation is satisfied monthly. We typically receive a payment within a set number of days following the end of the month which includes payment for all deliveries in that month. Depending on contract circumstances, judgment could be required to determine when the transfer of control occurs. Generally, depending of the facts and circumstances, we consider the transfer of control of the asset in a commodity sale to occur at the point the commodity transfers to our purchaser. Most of the consideration received by us for oil and gas sales is variable. Most of our contracts state the consideration is calculated by multiplying a variable quantity by an agreed-on index price less deductions related to gathering, transportation, fractionation, and related fuel charges. There are also instances where the consideration is quantity multiplied by a weighted average sales price. These different pricing tools can change the perception of when control transfers; however, when analyzed with other control factors, typically the accounting conclusion is the same for both pricing methods. In these instances, the variable consideration is partially constrained. In addition, all variable consideration is settled at the end of the month; therefore, whether the variability is constrained does not affect accounting for revenue under ASC 606 as the variability is known prior to each reporting period. An estimation and allocation of transaction price and future obligations are not required. Contract Drilling Contracts, Revenues, Implementation impact to retained earnings, and Performance Obligations The contracts our drilling segment uses are primarily industry standard IADC contracts model year 2003 and 2013. Contract terms range from six months to three or more years or can be based on terms to drill a specific number of wells. The allocation rules in ASC 606 (called the "series guidance") provide that a contract may contain a single performance obligation composed of a series of distinct goods or services if 1) each distinct good or service is substantially the same and would meet the criteria to be a performance obligation satisfied over time and 2) each distinct good or service is measured using the same method as it relates to the satisfaction of the overall performance obligation. We have determined that the delivery of drilling services is within the scope of the series guidance as both criteria noted above are met. Specifically, 1) each distinct increment of service (i.e. hour available to drill) that the drilling contractor promises to transfer represents a performance obligation that would meet the criteria for recognizing revenue over time, and 2) the drilling contractor would use the same method for measuring progress toward satisfaction of the performance obligation for each distinct increment of service in the series. At inception, the total transaction price will be estimated to include any applicable fixed consideration, unconstrained variable consideration (estimated day rate mobilization and demobilization revenue, estimated operating day rate revenue to be earned over the contract term, expected bonuses (if material and can be reasonably estimated without significant reversal), and penalties (if material and can be reasonably estimated without significant reversal)). Allocation rules under this new standard allow us to recognize revenues associated with our drilling contacts in materially the same manner as under the previous revenue accounting standard. A contract liability will be recorded for consideration received before the corresponding transfer of services. Those liabilities will generally only arise in relation to upfront mobilization fees paid in advance and are allocated/recognized over the entire performance obligation. Such balances will be amortized over the recognition period based on the same method of measure used for revenue. On adoption of the standard, no adjustment to opening retained earnings was required. Our performance obligation for all drilling contracts is to drill the agreed-on number of wells or drill over an agreed-on period as stated in the contract. Any mobilization and demobilization activities are not considered distinct within the context of the contract and therefore, any associated revenue is allocated to the overall performance obligation of drilling services and recognized ratably over the initial term of the related drilling contract. It typically takes from 10 to 90 days to complete drilling a well; therefore, depending on the number of wells under a contract, the contract term could be up to three years. Most of the drilling contracts are for less than one year. As the customer simultaneously receives and consumes the benefits provided by the company’s performance, and the company’s performance enhances an asset that the customer controls, the performance obligation to drill the well occurs over time. We typically receive payment within a set number of days following the end of the month and that payment includes payment for all services performed during that month (calculated on an hourly basis). The company satisfies its overall performance obligation when the well included in the contract is drilled to an agreed-on depth or by a set date. All consideration received for contract drilling is variable, excluding termination fees, which we have concluded will not apply to our contracts as of the reporting date. The consideration is calculated by multiplying a variable quantity (number of days/hours) by an agreed-on daily price (for the daily rate, mobilization and demobilization revenue). Other revenue items under the contract may include bonus/penalty revenue, reimbursable revenue, drilling fluid rates, and early termination fees. All variable consideration is not constrained but is settled at the end of the month; therefore, whether the variability is constrained or not does not affect accounting for revenue under ASC 606 as the variability is known before each reporting period excluding certain bonuses/penalties which might be based on activity that occurs over the entire term of the contract. We have evaluated the mobilization and de-mobilization charges on outstanding contracts, however, the impact to the financial statements was immaterial. As of September 30, 2018, we had 34 contract drilling contracts (21 of which are long-term) for a duration of two months to almost three years. Under the guidance in relation to disclosures regarding the remaining performance obligations, there is a practical expedient for contracts with an original expected duration of one year or less (ASC 606-10-50-14) and for contracts where the entity can recognize revenue as invoiced (ASC 606-10-55-18). The majority of our drilling contracts have an original term of less than one year; however, the remaining performance obligations under the contracts that have a longer duration are not material. Mid-stream Contracts Revenues, and Implementation impact to retained earnings, and Performance Obligations Revenues are generated from the fees earned for gas gathering and processing services provided to a customer. The typical revenue contracts used by this segment are gas gathering and processing agreements. Contract terms range from a single month to terms spanning a decade or more, some include evergreen provisions. Fees for mid-stream services (gathering, transportation, processing) are performance obligations and meet the criteria of over time recognition which could be considered a series of distinct performance obligations that represents one overall performance obligation of gas gathering and processing services. On adoption of the standard, an adjustment to opening retained earnings was made for $1.7 million ($1.3 million, net of tax). This adjustment—related to the timing of revenue recognized on certain demand fees—impacted our Unaudited Condensed Consolidated Balance Sheet (for the periods indicated) as follows:
At September 30, 2018:
For the three months ended September 30, 2018:
This adjustment related to the timing of revenue recognized on certain demand fees and had the following impact to the Unaudited Condensed Consolidated Income Statement for the nine months ended September 30, 2018:
The only fixed consideration related to mid-stream consideration is a demand fee calculated by multiplying an agreed-on price by a fixed number of volumes per month over a specified term in the contract. Included below is the additional fixed revenue we will earn over the remaining term of the contracts and excludes all variable consideration to be earned with the associated contract.
Before implementing ASC 606, we immediately recognized the entire demand fee since the fee was payable within the first five years from the effective date of the contract and not over the entire term of the contract. However, as the demand fee does not specifically relate to a distinct performance obligation, under the new standard that amount should now be recognized over the life of the contract. Therefore, the demand fee previously recognized for $1.7 million ($1.3 million, net of tax) was adjusted to retained earnings as of January 1, 2018 and will be recognized over the remaining term of the contract. As this amount is fixed, recognition of the remaining portion will be stable. Besides the demand fee, there were no other contract assets or liabilities (see above for the balance sheet line items where they are reported). For the three and nine months ended September 30, 2018, $1.3 million and $3.7 million, respectively, was recognized in revenue for these demand fees.
Our performance obligations for all contracts is to gather, transport, or process an agreed-on number of volumes as stated in the contract. Typically, the contract will establish a period over which the company will perform the mid-stream services. Certain contracts also include an agreed-on quantity (or an agreed-on minimum quantity) of volumes that the company will deliver or service. The term under mid-stream service contracts is typically five to ten years. Under service contracts, as the customer simultaneously receives and consumes the benefits provided by the entity’s performance as the entity performs, the performance obligation to gather, transport, or process occurs over time. We typically receive payment within a set number of days following the end of the month and includes payment for all services performed that month. Our overall performance obligation is satisfied at the end of the contract term. Most of the consideration received under mid-stream service contracts is variable. The consideration is calculated by multiplying a variable quantity (number of volumes) by an agreed-on price per MCF (commodity fee and the gathering fee). One fixed component of revenue is calculated by multiplying an agreed-on price by a certain volume commitment (MCF per day). Other revenue items may include shortfall fees. All variable consideration is settled at the end of the month; therefore, whether or not the variability is constrained does not affect accounting for revenue under ASC 606 as the variability is known before each reporting period. However, this excludes the shortfall fee as this fee could be based on a set number of volumes over the course of more than one month. Per the new guidance related to disclosures for remaining performance obligations, there is a practical expedient for contracts with an original expected duration of one year or less (ASC 606-10-50-14). There is also a practical expedient for “variable consideration [that] is allocated entirely to a wholly unsatisfied performance obligation… that forms part of a single performance obligation… for which the criteria in paragraph 606-10-32-40 have been met” (ASC 606-10-50-14A). As stated previously, the contract term for mid-stream services is typically longer than one year. However, based on the guidance at 606-10-32-40, we determined some of the variable payment in mid-stream service agreements specifically relates to the entity’s efforts to satisfy the performance obligation and that “allocating the variable amount entirely to the distinct good or service is consistent with the allocation objective in paragraph 606-10-32-28.” Therefore, the practical expedient relates to this variable consideration: the commodity fee and the gathering fee. The last time we received a shortfall fee was in 2016 and the amount was immaterial to total mid-stream revenues. These terms have historically been limited in our contracts. We calculate revenue earned from the variable consideration related to mid-stream services by multiplying the number of volumes serviced times an agreed-on price. Therefore, the variable portion of this consideration is due to the change in volumes. This variability is resolved at the end of each month as the company will know the number of volumes serviced under each contract and payment is received monthly. The mid-stream gathering service contracts remaining are for a duration of less than one year to 15 years. While long term service contracts are in place as of the reporting date, due to the variable volumes an estimation and allocation of transaction price and future obligations are not required. |
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- References No definition available.
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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Divestitures |
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| Property, Plant and Equipment Impairment or Disposal [Abstract] | |
| Divestitures | DIVESTITURES Divestitures Oil and Natural Gas We sold non-core oil and natural gas assets, net of related expenses, for $22.3 million during the first nine months of 2018, compared to $18.0 million during the first nine months of 2017. Proceeds from those sales reduced the net book value of our full cost pool with no gain or loss recognized. Mid-Stream On April 3, 2018, we sold 50% of the ownership interest in our mid-stream segment, Superior. The purchaser is SP Investor Holdings, LLC, a holding company jointly owned by OPTrust and funds managed and/or advised by Partners Group, a global private markets investment manager. We received $300.0 million because of this sale. A portion of the proceeds were used to pay down our bank debt and the remainder will accelerate the drilling program of our upstream subsidiary, Unit Petroleum Company, make additional capital investments in the jointly owned Superior, and for general working capital purposes. In connection with the sale of the interest in Superior, we took the necessary actions under the Indenture governing our outstanding senior subordinated notes to secure the ability to close the sale and have Superior released from the Indenture. Superior will be governed and managed under its Amended and Restated Limited Liability Company Agreement and the Master Services and Operating Agreement (MSA) signed by Superior and an affiliate of Unit, as both agreements may be amended occasionally. Further details are in Note 13 – Variable Interest Entity Arrangements. |
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- Definition The entire disclosure for business combinations, including leverage buyout transactions (as applicable), and divestitures. This may include a description of a business combination or divestiture (or series of individually immaterial business combinations or divestitures) completed during the period, including background, timing, and assets and liabilities recognized and reclassified or sold. This element does not include fixed asset sales and plant closings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | The following table shows the number of stock options and SARs (and their average exercise price) excluded because their option exercise prices were greater than the average market price of our common stock:
The following table shows the number of stock options and SARs (and their average exercise price) excluded because their option exercise prices were greater than the average market price of our common stock:
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| Earnings Per Share | EARNINGS PER SHARE Information related to the calculation of earnings per share attributable to Unit Corporation follows:
The following table shows the number of stock options and SARs (and their average exercise price) excluded because their option exercise prices were greater than the average market price of our common stock:
The following table shows the number of stock options and SARs (and their average exercise price) excluded because their option exercise prices were greater than the average market price of our common stock:
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- References No definition available.
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- Definition The entire disclosure for earnings per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Accrued Liabilities |
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| Accrued Liabilities | ACCRUED LIABILITIES Accrued liabilities consisted of:
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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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Long-Term Debt And Other Long-Term Liabilities |
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| Debt Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-Term Debt And Other Long-Term Liabilities | LONG-TERM DEBT AND OTHER LONG-TERM LIABILITIES Long-Term Debt Our long-term debt as of the dates indicated consisted of the following:
Unit Credit Agreement. On October 18, 2018, we signed a Fifth Amendment to our Senior Credit Agreement (Unit credit agreement) originally scheduled to mature on April 10, 2020. The details of this amendment are discussed in Note 17 – Subsequent Events and have not been incorporated into the discussion of the Unit credit agreement immediately below. On April 2, 2018, we entered into a fourth amendment to the Unit credit agreement (Fourth Amendment). The Fourth Amendment provided, among other things, for a reduction of the maximum credit amount from $875.0 million to $425.0 million, a reduction in the borrowing base from $475.0 million to $425.0 million, a reduction in the total commitment amount from $475.0 million to $425.0 million; and the full release of Superior and its subsidiaries as a borrower and co-obligor under the Unit credit agreement. Under the amendment, once the sale of the interest in Superior was completed, we had to use part of the proceeds to pay down the Unit credit agreement. The Superior sale closed on April 3, 2018 and the pay down was made that day. On May 2, 2018, the company signed a Pledge Agreement with BOKF, NA (dba Bank of Oklahoma), as administrative agent to benefit the secured parties, under which we granted a security interest in the limited liability membership interests and other equity interests we own in Superior (which as of this report is 50% of the aggregate outstanding equity interests of Superior) as additional collateral for our obligations under the Unit credit agreement. We are charged a commitment fee of 0.50% on the amount available but not borrowed. That fee varies based on the amount borrowed as a percentage of the total borrowing base. We paid $1.0 million in previous origination, agency, syndication, and other related fees. We incurred no additional fees related to the fourth amendment. We are amortizing these fees over the life of the Unit credit agreement. Under the Unit credit agreement, we have pledged as collateral 85% of the proved developed producing (discounted as present worth at 8%) total value of our oil and gas properties. The borrowing base amount is subject to redetermination by the lenders on April 1st and October 1st of each year and is based on a percentage of the discounted future value of our oil and natural gas reserves. We or the lenders may request a onetime special redetermination of the borrowing base between each scheduled redetermination. In addition, we may request a redetermination following the completion of an acquisition that meets the requirements in the Unit credit agreement. At our election, any part of the outstanding debt under the Unit credit agreement can be fixed at a London Interbank Offered Rate (LIBOR). LIBOR interest is computed as the LIBOR base for the term plus 2.00% to 3.00% depending on the level of debt as a percentage of the borrowing base and is payable at the end of each term, or every 90 days, whichever is less. Borrowings not under LIBOR bear interest at the prime rate specified in the Unit credit agreement but in no event less than LIBOR plus 1.00% plus a margin. Interest is payable at the end of each month and the principal may be repaid in whole or in part at any time, without a premium or penalty. At September 30, 2018, we had no outstanding borrowings under the Unit credit agreement. We can use borrowings for financing general working capital requirements for (a) exploration, development, production, and acquisition of oil and gas properties, (b) acquisitions and operation of mid-stream assets up to certain limits, (c) issuance of standby letters of credit, (d) contract drilling services and acquisition of contract drilling equipment, and (e) general corporate purposes. The Unit credit agreement prohibits, among other things:
Effective September 30, 2018, the Unit credit agreement also requires that we have at the end of each quarter:
As of September 30, 2018, we were in compliance with the Unit credit agreement covenants. Superior Credit Agreement. On May 10, 2018, Superior signed a five-year, $200.0 million senior secured revolving credit facility with an option to increase the credit amount up to $250.0 million, subject to certain conditions (Superior credit agreement). The amounts borrowed under the Superior credit agreement bear annual interest at a rate, at Superior’s option, equal to (a) LIBOR plus the applicable margin of 2.00% to 3.25% or (b) the alternate base rate (greater of (i) the federal funds rate plus 0.5%, (ii) the prime rate, and (iii) third day LIBOR plus 1.00%) plus the applicable margin of 1.00% to 2.25%. The obligations under the Superior credit agreement are secured by, among other things, mortgage liens on certain of Superior’s processing plants and gathering systems. Superior is charged a commitment fee of 0.375% on the amount available but not borrowed which varies based on the amount borrowed as a percentage of the total borrowing base. Superior paid $1.7 million in origination, agency, syndication, and other related fees. These fees are being amortized over the life of the Superior credit agreement. The Superior credit agreement requires that Superior maintain a Consolidated EBITDA to interest expense ratio for the most-recently ended rolling four quarters of at least 2.50 to 1.00, and a funded debt to Consolidated EBITDA ratio of not greater than 4.00 to 1.00. The Superior credit agreement also contains several customary covenants that restrict (subject to certain exceptions) Superior’s ability to incur additional indebtedness, create additional liens on its assets, make investments, pay distributions, sign sale and leaseback transactions, engage in certain transactions with affiliates, engage in mergers or consolidations, sign hedging arrangements, and acquire or dispose of assets. As of September 30, 2018, Superior was in compliance with the Superior credit agreement covenants. The borrowings under the Superior credit agreement will fund capital expenditures and acquisitions, provide general working capital, and for letters of credit for Superior. On June 27, 2018, Superior and the lenders amended the Superior credit agreement to revise certain definitions in the agreement. Superior's credit agreement is not guaranteed by Unit. 6.625% Senior Subordinated Notes. We have an aggregate principal amount of $650.0 million, 6.625% senior subordinated notes (the Notes) outstanding. Interest on the Notes is payable semi-annually (in arrears) on May 15 and November 15 of each year. The Notes mature on May 15, 2021. In issuing the Notes, we incurred fees of $14.7 million that are being amortized as debt issuance cost over the life of the Notes. The Notes are subject to an Indenture dated as of May 18, 2011, between us and Wilmington Trust, National Association (successor to Wilmington Trust FSB), as Trustee (the Trustee), as supplemented by the First Supplemental Indenture dated as of May 18, 2011, between us, the Guarantors, and the Trustee, and as further supplemented by the Second Supplemental Indenture dated as of January 7, 2013, between us, the Guarantors, and the Trustee (as supplemented, the 2011 Indenture), establishing the terms of and providing for issuing the Notes. The Guarantors are most of our direct and indirect subsidiaries. The discussion of the Notes in this report is qualified by and subject to the actual terms of the 2011 Indenture. Unit, as the parent company, has no significant independent assets or operations. The guarantees by the Guarantors of the Notes (registered under registration statements) are full and unconditional, joint and several, subject to certain automatic customary releases, are subject to certain restrictions on the sale, disposition, or transfer of the capital stock or substantially all of the assets of a subsidiary guarantor, and other conditions and terms set out in the 2011 Indenture. Effective April 3, 2018, Superior is no longer a Guarantor of the Notes. Any of our other subsidiaries that are not Guarantors are minor. There are no significant restrictions on our ability to receive funds from any of our subsidiaries through dividends, loans, advances, or otherwise. We may redeem all or, occasionally, a part of the Notes at certain redemption prices, plus accrued and unpaid interest. If a “change of control” occurs, subject to certain conditions, we must offer to repurchase from each holder all or any part of that holder’s Notes at a purchase price in cash equal to 101% of the principal amount of the Notes plus accrued and unpaid interest to the date of purchase. The 2011 Indenture contains customary events of default. The 2011 Indenture also contains covenants including those that limit our ability and the ability of certain of our subsidiaries to incur or guarantee additional indebtedness; pay dividends on our capital stock or redeem capital stock or subordinated indebtedness; transfer or sell assets; make investments; incur liens; enter into transactions with our affiliates; and merge or consolidate with other companies. We were in compliance with all covenants of the Notes as of September 30, 2018. Other Long-Term Liabilities Other long-term liabilities consisted of the following:
Estimated annual principal payments under the terms of our long-term debt and other long-term liabilities during the five successive twelve-month periods beginning October 1, 2018 (and through 2023) are $14.1 million, $43.1 million, $659.8 million, $4.6 million, and $2.3 million, respectively. Capital Leases In 2014, Superior entered into capital lease agreements for 20 compressors with initial terms of seven years. The underlying assets are included in gas gathering and processing equipment. The $4.0 million current portion of the capital lease obligations is included in current portion of other long-term liabilities and the non-current portion of $8.4 million is included in other long-term liabilities in the accompanying Unaudited Condensed Consolidated Balance Sheets as of September 30, 2018. These capital leases are discounted using annual rates of 4.00%. Total maintenance and interest remaining related to these leases are $4.6 million and $0.8 million, respectively, at September 30, 2018. Annual payments, net of maintenance and interest, average $4.2 million annually through 2021. At the end of the term, Superior has the option to purchase the assets at 10% of their then fair market value. Future payments required under the capital leases at September 30, 2018 are:
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- References No definition available.
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- Definition The entire disclosure for long-term debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Asset Retirement Obligations |
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| Asset Retirement Obligations | ASSET RETIREMENT OBLIGATIONS We are required to record the estimated fair value of the liabilities relating to the future retirement of our long-lived assets. Our oil and natural gas wells are plugged and abandoned when the oil and natural gas reserves in those wells are depleted or the wells are no longer able to produce. The plugging and abandonment liability for a well is recorded in the period in which the obligation is incurred (at the time the well is drilled or acquired). None of our assets are restricted for purposes of settling these AROs. All our AROs relate to the plugging costs associated with our oil and gas wells. The following table shows certain information about our AROs for the periods indicated:
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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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New Accounting Pronouncements |
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| New Accounting Pronouncements and Changes in Accounting Principles [Abstract] | |
| New Accounting Pronouncements | NEW ACCOUNTING PRONOUNCEMENTS Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement. The FASB issued ASU 2018-13 to modify the disclosure requirements in Topic 820. Part of the disclosures were removed or modified and other disclosures were added. The amendment will be effective for reporting periods beginning after December 15, 2019. Early adoption is permitted. Also it is permitted to early adopt any removed or modified disclosure and delay adoption of the additional disclosures until their effective date. This amendment will not have a material impact on our financial statements. Compensation—Stock Compensation: Improvements to Nonemployee Share-Based Payment Accounting. The FASB issued ASU 2018-07, to improve financial reporting for nonemployee share-based payments. The amendment expands Topic 718, Compensation—Stock Compensation to include share-based payments issued to nonemployees for goods or services. The amendment will be effective for years beginning after December 15, 2019, and interim periods within those years. This amendment will not have a material impact on our financial statements. Income Taxes - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118. In March 2018, the FASB issued ASU 2018-05 which updates the FASB’s Accounting Standards Codification to reflect the guidance in SAB 118, which adds Section EE, “Income Tax Accounting Implications of the Tax Cuts and Jobs Act,” to SAB Topic 5, “Miscellaneous Accounting.” SAB 118 also provides guidance on applying ASC 740, Income Taxes, if the accounting for certain income tax effects of the Tax Cuts and Jobs Act of 2017 is incomplete when the financial statements are issued for a reporting period. Intangibles—Goodwill and Other: Simplifying the Test for Goodwill Impairment. The FASB issued ASU 2017-04, to simplify the measurement of goodwill. The amendment eliminates Step 2 from the goodwill impairment test. The amendment will be effective prospectively for reporting periods beginning after December 15, 2019, and early adoption is permitted. This amendment will not have a material impact on our financial statements. Leases. The FASB has issued several accounting standards updates and amendments related to leases in the past two years, which are codified within Topic 842. For public companies, these are effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. The standard requires lessees to recognize at the commencement date of a lease a lease liability, which represents the lessee's obligation to make lease payments arising from the lease, measured on a discounted basis; and a right-of-use asset, which represents the lessee's right to use a specified asset for the lease term. Other recently issued amendments to Topic 842 have provided clarifying guidance regarding land easements, an additional modified retrospective transition method, and added several practical expedients to apply Topic 842 for both lessees and lessors. The standard will not apply to leases of mineral rights. We have an implementation team working through the provisions of the new guidance including a review of different types of contracts to document our lease portfolio and assess the impact on our accounting, disclosures, processes, internal control over financial reporting, and the election of certain practical expedients. Our evaluation of the impact of the new guidance on our financial statements is on-going. We have made certain accounting policy decisions including that we plan to adopt the short-term lease recognition exemption, accounting for certain asset classes at a portfolio level, and establishing a balance sheet recognition capitalization threshold. Our transition will utilize the modified retrospective approach to adopting the new standard, and will be applied at the beginning of the period adopted (January 1, 2019) in accordance with ASU 2018-11. We expect to elect the transition practical expedient, which allows us to not evaluate land easements that existed prior to January 1, 2019, and the optional transition method to record the adoption impact through a cumulative adjustment to equity. We expect for certain lessee asset classes to elect the practical expedient and not separate lease and nonlease components. For these asset classes, we will account for the agreements as a single lease component. We expect for certain lessor asset classes to elect the practical expedient and not separate lease and nonlease components and determine the appropriate accounting based on the predominate component of the contract. The assessment of predominance is ongoing. We anticipate a material impact to the balance sheet across segments as we recognize Right of Use assets and liabilities but no material impact to the income statement (from the lessee's perspective). The assessment of the dollar value impact of adoption is on-going. Adopted Standards Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The FASB issued ASU 2018-02, an amendment which provides financial statement preparers with an option to reclassify stranded tax effects within AOCI to retained earnings caused by the Tax Cuts and Jobs Act of 2017. The amendment is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. Organizations should apply the proposed amendments either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. We adopted this amendment early and it had no material effect to our financial statements. We previously used 37.75% to calculate the tax effect on AOCI and now we are using 24.5%. The change is reflected in our Unaudited Condensed Consolidated Statements of Comprehensive Income and in Note 14 - Equity. Revenue from Contracts with Customers. Effective January 1, 2018, we adopted ASC 606. This new revenue standard provides for a five-step analysis of transactions to determine when and how revenue is to be recognized. The guidance in this update supersedes the revenue recognition requirements in ASC 605, Revenue Recognition, and most industry-specific guidance throughout the Industry Topics of the Codification. Under the standard, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration the entity expects to receive in exchange for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. We applied the five-step method outlined in the ASU to all our revenue streams in the scope of ASC 606 and elected the modified retrospective approach method. Under that approach the cumulative effect on adoption is recognized as an adjustment to opening retained earnings at January 1, 2018. Only our mid-stream segment was affected. This adjustment related to the timing of revenue on certain demand fees. Both our oil and natural gas and contract drilling segments had no retained earnings adjustment. Comparative prior periods have not been adjusted and continue to be reported under ASC 605. The additional disclosures required by ASC 606 have been included in Note 2 – Revenue from Contracts with Customers. Our internal control framework did not materially change because of this standard, but the existing internal controls have been modified to consider our new revenue recognition policy effective January 1, 2018. As we implement the new standard, we have added internal controls to ensure that we adequately evaluate new contracts under the five-step model under ASU 2014-09. |
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- References No definition available.
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- Definition The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-Based Compensation |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock-Based Compensation | STOCK-BASED COMPENSATION For restricted stock awards and stock options, we had:
The remaining unrecognized compensation cost related to unvested awards at September 30, 2018 is approximately $19.0 million, of which $2.4 million is anticipated to be capitalized. The weighted average period over which this cost will be recognized is 1.0 year. Our Second Amended and Restated Unit Corporation Stock and Incentive Compensation Plan effective May 6, 2015 (the amended plan) allows us to grant stock-based and cash-based compensation to our employees (including employees of subsidiaries) and to non-employee directors. 7,230,000 shares of the company's common stock are authorized for issuance to eligible participants under the amended plan with 2,000,000 shares being the maximum number of shares that can be issued as "incentive stock options." We granted no SARs or stock options during either of the three or nine month periods ending September 30, 2018 or 2017. We did not grant any restricted stock awards during either of the three month periods ending September 30, 2018 or 2017. This table shows the fair value of restricted stock awards granted to employees and non-employee directors during the periods indicated:
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The time vested restricted stock awards granted during the first nine months of 2018 and 2017 are being recognized over a three-year vesting period. During the first quarter of 2018 and 2017, two performance vested restricted stock awards were granted to certain executive officers. The first will cliff vest three years from the grant date based on the company's achievement of certain stock performance measures (TSR) at the end of the term and will range from 0% to 200% of the restricted shares granted as performance shares. The second will vest, one-third each year, over a three-year vesting period subject to the company's achievement of cash flow to total assets (CFTA) performance measurement each year and will range from 0% to 200%. Based on a probability assessment of the selected TSR performance criteria at September 30, 2018, the participants are estimated to receive 49% of the 2018, 92% of the 2017, and 170% of the 2016 performance-based shares. The CFTA performance measurement at September 30, 2018 was assessed to vest at target or 100%. The total aggregate stock compensation expense and capitalized cost related to oil and natural gas properties for 2018 awards for the first nine months of 2018 was $7.5 million. |
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- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Derivatives |
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| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivatives | DERIVATIVES Commodity Derivatives We have signed various types of derivative transactions covering some of our projected natural gas and oil production. These transactions are intended to reduce our exposure to market price volatility by setting the price(s) we will receive for that production. Our decisions on the price(s), type, and quantity of our production subject to a derivative contract are based, in part, on our view of current and future market conditions. As of September 30, 2018, these hedges made up our derivative transactions:
We have documented policies and procedures to monitor and control the use of derivative transactions. We do not engage in derivative transactions not otherwise tied to our projected production. Any changes in the fair value of our derivative transactions before maturity (i.e., temporary fluctuations in value) are reported in gain (loss) on derivatives in our Unaudited Condensed Consolidated Income Statements. At September 30, 2018, these derivatives were outstanding:
After September 30, 2018, the following derivatives were entered into:
The following tables present the fair values and locations of the derivative transactions recorded in our Unaudited Condensed Consolidated Balance Sheets:
All our counterparties are subject to master netting arrangements. If we have a legal right of set-off, we net the value of the derivative transactions we have with the same counterparty in our Unaudited Condensed Consolidated Balance Sheets. Following is the effect of derivative instruments on the Unaudited Condensed Consolidated Income Statements for the three months ended September 30:
Following is the effect of derivative instruments on the Unaudited Condensed Consolidated Income Statements for the nine months ended September 30:
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- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair Value Measurements |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements | FAIR VALUE MEASUREMENTS The estimated fair value of our available-for-sale securities, reflected on our Unaudited Condensed Consolidated Balance Sheets as Non-current other assets, is based on market quotes. The following is a summary of available-for-sale securities:
During the second quarter of 2017, we received available-for-sale securities for early termination fees associated with a long-term drilling contract. We will evaluate the marketability of those equity securities to determine if any decline in fair value below cost is other-than-temporary. If a decline in fair value below cost is determined to be other-than-temporary, an impairment charge will be recorded, and a new cost basis established. We will review several factors to determine whether a loss is other-than-temporary. These factors include, but are not limited to, (i) the time a security is in an unrealized loss position, (ii) the extent to which fair value is less than cost, (iii) the financial condition and near-term prospects of the issuer, and (iv) our intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value. Fair value is defined as the amount that would be received from the sale of an asset or paid for transferring a liability in an orderly transaction between market participants (in either case, an exit price). To estimate an exit price, a three-level hierarchy is used prioritizing the valuation techniques used to measure fair value into three levels with the highest priority given to Level 1 and the lowest priority given to Level 3. The levels are summarized as follows:
The inputs available to us determine the valuation technique we use to measure the fair values of our financial instruments. The following tables set forth our recurring fair value measurements:
All our counterparties are subject to master netting arrangements. If a legal right of set-off exists, we net the value of the derivative transactions we have with the same counterparty. We are not required to post cash collateral with our counterparties and no collateral has been posted as of September 30, 2018. We used the following methods and assumptions to estimate the fair values of the assets and liabilities in the table above. There were no transfers between Level 2 and Level 3 financial assets (liabilities). Level 1 Fair Value Measurements Equity Securities. We measure the fair values of our available for sale securities based on market quotes. Level 2 Fair Value Measurements Commodity Derivatives. We measure the fair values of our crude oil and natural gas swaps using estimated internal discounted cash flow calculations based on the NYMEX futures index. Level 3 Fair Value Measurements Commodity Derivatives. The fair values of our natural gas and crude oil collars and three-way collars are estimated using internal discounted cash flow calculations based on forward price curves, quotes obtained from brokers for contracts with similar terms, or quotes obtained from counterparties to the agreements. The following table is a reconciliation of our level 3 fair value measurements:
The following table provides quantitative information about our Level 3 unobservable inputs at September 30, 2018:
Our valuation at September 30, 2018 reflected that the risk of non-performance was immaterial. Fair Value of Other Financial Instruments This disclosure of the estimated fair value of financial instruments is made under accounting guidance for financial instruments. We have determined the estimated fair values by using market information and valuation methodologies. Considerable judgment is required in interpreting market data to develop the estimates of fair value. Using different market assumptions or valuation methodologies may have a material effect on the estimated fair value amounts. At September 30, 2018, the carrying values on the Unaudited Condensed Consolidated Balance Sheets for cash and cash equivalents (composed of bank and money market accounts - classified as Level 1), accounts receivable, accounts payable, other current assets, and current liabilities approximate their fair value because of their short-term nature. Based on the borrowing rates available to us for credit agreement debt with similar terms and maturities and considering the risk of our non-performance, long-term debt under our credit agreements approximate their fair value and at September 30, 2018 we did not have any outstanding borrowings under either the Unit or Superior credit agreement. Borrowings from our Unit credit agreement at December 31, 2017 were $178.0 million. These borrowings would be classified as Level 2. The carrying amounts of long-term debt associated with the Notes, net of unamortized discount and debt issuance costs, reported in the Unaudited Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017 were $643.9 million and $642.3 million, respectively. We estimate the fair value of the Notes using quoted marked prices at September 30, 2018 and December 31, 2017 was $655.5 million and $649.7 million, respectively. The Notes would be classified as Level 2. Fair Value of Non-Financial Instruments The initial measurement of AROs at fair value is calculated using discounted cash flow techniques and based on internal estimates of future retirement costs associated with property, plant, and equipment. Significant Level 3 inputs used in the calculation of AROs include plugging costs and remaining reserve lives. A reconciliation of the company’s AROs is presented in Note 7 – Asset Retirement Obligations. |
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- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commitments and Contingencies |
9 Months Ended |
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Sep. 30, 2018 | |
| Commitments and Contingencies [Abstract] | |
| Commitments and Contingencies | COMMITMENTS AND CONTINGENCIES We lease office space or yards in Edmond and Oklahoma City, Oklahoma; Houston, Texas; Englewood, Colorado; Pinedale, Wyoming; and Canonsburg, Pennsylvania under the terms of operating leases expiring through December 2021. We own our corporate headquarters in Tulsa, Oklahoma. We also have several compressor rentals, equipment leases, and lease space on short-term commitments to stack excess drilling rig equipment and production inventory. Future minimum rental payments under the terms of the leases are approximately $5.1 million, $2.1 million, $0.6 million, and less than $0.1 million in twelve-month periods beginning October 1, 2018 (and through 2021), respectively. Total rent expense incurred was $7.2 million and $6.4 million for the first nine months of 2018 and 2017, respectively. In 2014, Superior signed capital lease agreements for 20 compressors with initial terms of seven years. Estimated annual capital lease payments under the terms during the four successive twelve-month periods beginning October 1, 2018 (and through the end of 2021) are $6.2 million, $6.2 million, and $5.3 million. Total maintenance and interest remaining related to these leases are $4.6 million and $0.8 million, respectively at September 30, 2018. Annual payments, net of maintenance and interest, average $4.2 million annually through 2021. At the end of the term, Superior has the option to purchase the assets at 10% of their then fair market value. The employee oil and gas limited partnerships require, on the election of a limited partner, that we repurchase the limited partner’s interest at amounts to be determined by appraisal. In any one year, these repurchases are limited to 20% of the units outstanding. We made repurchases of approximately $1,700 and $2,900 in the first nine months of 2018 and 2017, respectively. We manage our exposure to environmental liabilities on properties to be acquired by identifying existing problems and assessing the potential liability. We also conduct periodic reviews, on a company-wide basis, to identify changes in our environmental risk profile. These reviews evaluate whether there is a probable liability, its amount, and the likelihood that the liability will be incurred. Any potential liability is determined by considering, among other matters, incremental direct costs of any likely remediation and the proportionate cost of employees expected to devote significant time directly to any possible remediation effort. As it relates to evaluations of purchased properties, depending on the extent of an identified environmental problem, we may exclude a property from the acquisition, require the seller to remediate the property to our satisfaction, or agree to assume liability for the remediation of the property. We have not historically experienced any environmental liability while being a contract driller since the greatest portion of risk is borne by the operator. Any liabilities we have incurred have been small and have been resolved while the drilling rig is on the location and the cost has been included in the direct cost of drilling the well. During the second quarter of 2018, as part of the Superior transaction, we entered into a contractual obligation that commits us to spend $150.0 million to drill wells in the Granite Wash/Buffalo Wallow area over three years starting January 1, 2019. This amount is already included in our drilling plan. For each dollar of the $150.0 million that we do not spend (over the three year period), we would forgo receiving $0.58 of future distributions from our 50% ownership interest in our consolidated mid-stream subsidiary. If we elected not to drill or spend any money in the designated area over the three year period, the maximum amount we could forgo from distributions would be $87.0 million. For the next twelve months, we have committed to purchase approximately $10.1 million of new drilling rig components. |
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- Definition Commitments and Contingencies [Abstract] No definition available.
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- Definition The entire disclosure for commitments and contingencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Variable Interest Entity Arrangements |
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| Variable Interest Entity Arrangements [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Variable Interest Entity Arrangements | VARIABLE INTEREST ENTITY ARRANGEMENTS On April 3, 2018 we sold 50% of the ownership interest in Superior. The 50% interest in Superior we sold was acquired by SP Investor Holdings, LLC, a holding company jointly owned by OPTrust and funds managed and/or advised by Partners Group, a global private markets investment manager. Superior will be governed and managed under the Amended and Restated Limited Liability Company Agreement and the MSA. The MSA is between our affiliate, SPC Midstream Operating, L.L.C. (the Operator) and Superior. The Operator is owned 100% by Unit Corporation. Under the guidance in ASC 810, Consolidation, we have determined that Superior is a VIE. The two variable interests applicable to Unit include the 50% equity investment in Superior and the MSA. The MSA houses the power to direct the activities that most significantly impact Superior's operating performance. The MSA is a separate variable interest. Unit through the MSA has the power to direct Superior’s most significant activities; reciprocally the equity investors lack the power to direct the activities that most significantly impact the entity’s economic performance. Because of this, Unit is considered the primary beneficiary. There have been no changes to the primary beneficiary during the quarter ended September 30, 2018. As the primary beneficiary of this VIE, we consolidate in the financial statements the financial position, results of operations and cash flows of this VIE, and all intercompany balances and transactions between us and the VIE are eliminated in the consolidated financial statements. Cash distributions of income, net of agreed on expenses, and estimated expenses are allocated to the equity owners as specified in the relevant agreements. On the sale or liquidation of Superior, distributions would occur in the order and priority specified in the relevant agreements. As the Operator, we provide services, such as operations and maintenance support, accounting, legal, and human resources to Superior for a monthly service fee of $250,000. Superior's creditors have no recourse to our general credit. Superior's credit agreement is not guaranteed by Unit. The obligations under Superior's credit agreement are secured by, among other things, mortgage liens on certain of Superior’s processing plants and gathering systems. The carrying value of Superior's assets and liabilities, after eliminations of any intercompany transactions and balances, in the consolidated balance sheets were as follows:
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- Definition Variable Interest Entity Arrangements [Abstract] No definition available.
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- Definition The entire disclosure for a variable interest entity (VIE), including but not limited to, judgments and assumptions in determining whether to consolidate and in identifying the primary beneficiary, gain (loss) recognized on the initial consolidation of the VIE, terms of arrangements, amounts and classification of the VIE's assets and liabilities, and the entity's maximum exposure to loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Equity |
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| Equity [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | EQUITY At-the-Market (ATM) Common Stock Program On April 4, 2017, we signed a Distribution Agreement (the Agreement) with a sales agent, under which we could offer and sell, from time to time, through the sales agent shares of our common stock, par value $.20 per share (the Shares), up to an aggregate offering price of $100.0 million. Net proceeds from any of these sales could be used to fund (or offset costs of) acquisitions, future capital expenditures, repay amounts outstanding under our revolving credit facility, and general corporate purposes. On May 2, 2018, we terminated the Distribution Agreement. The Distribution Agreement was terminable at will on written notification by us with no penalty. As of the date of termination, we had sold 787,547 shares of our common stock under the Distribution Agreement resulting in net proceeds of approximately $18.6 million. We paid the sales agent a commission of 2.0% of the gross sales price per share sold. As a result of the termination, there will be no more sales of our common stock under the Distribution Agreement. Accumulated Other Comprehensive Income (Loss) Components of accumulated other comprehensive income (loss) were as follows for the three months ended September 30:
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Changes in accumulated other comprehensive income (loss) by component, net of tax, for the three months ended September 30 are as follows:
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Components of accumulated other comprehensive income (loss) were as follows for the nine months ended September 30:
Changes in accumulated other comprehensive income by component, net of tax, for the nine months ended September 30 are as follows:
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- References No definition available.
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- Definition The entire disclosure for investments in certain debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Industry Segment Information |
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| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Industry Segment Information | INDUSTRY SEGMENT INFORMATION We have three main business segments offering different products and services within the energy industry:
Our oil and natural gas segment is engaged in the acquisition, development, and production of oil, NGLs, and natural gas properties. The contract drilling segment is engaged in the land contract drilling of oil and natural gas wells and the mid-stream segment is engaged in the buying, selling, gathering, processing, and treating of natural gas and NGLs. We evaluate each segment’s performance based on its operating income, which is defined as operating revenues less operating expenses and depreciation, depletion, amortization, and impairment. We have no oil and natural gas production outside the United States. The following tables provide certain information about the operations of each of our segments:
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- References No definition available.
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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Supplemental Condensed Consolidated Financial Information |
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Condensed Consolidated Financial Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Condensed Consolidated Financial Statements | SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION We have no significant assets or operations other than our investments in our subsidiaries. Our wholly owned subsidiaries are the guarantors of our Notes. On April 3, 2018, we sold 50% of the ownership interest in our mid-stream segment, Superior and that company and its subsidiaries are no longer guarantors of the Notes. Instead of providing separate financial statements for each subsidiary issuer and guarantor, we have included the accompanying unaudited condensed consolidating financial statements based on Rule 3-10 of the SEC's Regulation S-X. For purposes of the following footnote:
The following unaudited supplemental condensed consolidating financial information reflects the Parent's separate accounts, the combined accounts of the Combined Guarantor Subsidiaries', the combined accounts of the Non-Guarantor Subsidiaries', the combined consolidating adjustments and eliminations, and the Parent's consolidated amounts for the periods indicated. Condensed Consolidating Balance Sheets (Unaudited)
Condensed Consolidating Statements of Income (Unaudited)
Condensed Consolidating Statements of Comprehensive Income (Unaudited)
Condensed Consolidating Statements of Cash Flows (Unaudited)
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- Definition Supplemental Condensed Consolidated Financial Information [Abstract] No definition available.
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- Definition The entire disclosure for condensed financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Subsequent Event |
9 Months Ended |
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Sep. 30, 2018 | |
| Subsequent Events [Abstract] | |
| Subsequent Events | SUBSEQUENT EVENT On October 18, 2018, we signed the fifth amendment to the Unit credit agreement originally scheduled to mature on April 10, 2020. The Fifth Amendment, among other things, (i) extends the term of the Unit credit agreement to October 18, 2023, subject to certain conditions; (ii) reduces the pricing for borrowing and non-use fees; and (iii) eliminates the requirement that the company maintain a senior indebtedness to consolidated EBITDA ratio. The total commitment of credit and the borrowing base both remain unchanged at $425.0 million. A copy of the Fifth Amendment is filed as Exhibit 10.1 to this report. |
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- References No definition available.
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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Revenues from Contracts with Customers (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Revenue From Contracts with Customers [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue Impact of the Adoption of ASC606 | These tables summarize the impact of the adoption of ASC 606 on revenue and operating costs for the three and nine months ended September 30, 2018, respectively:
For the three months ended September 30, 2018:
This adjustment related to the timing of revenue recognized on certain demand fees and had the following impact to the Unaudited Condensed Consolidated Income Statement for the nine months ended September 30, 2018:
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| Balance Sheet Impact of the Adoption of ASC606 | This adjustment—related to the timing of revenue recognized on certain demand fees—impacted our Unaudited Condensed Consolidated Balance Sheet (for the periods indicated) as follows:
At September 30, 2018:
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| Revenue, Remaining Performance Obligation | Included below is the additional fixed revenue we will earn over the remaining term of the contracts and excludes all variable consideration to be earned with the associated contract.
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| Contract with Customer, Asset and Liability |
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- Definition Revenue From Contracts with Customers [Abstract] No definition available.
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- Definition Tabular disclosure of contract balances and changes in contract balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tabular disclosure of the comparison between amounts disclosed under previous guidance and new guidance. No definition available.
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Earnings Per Share (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Earnings Per Share | Information related to the calculation of earnings per share attributable to Unit Corporation follows:
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| Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share | The following table shows the number of stock options and SARs (and their average exercise price) excluded because their option exercise prices were greater than the average market price of our common stock:
The following table shows the number of stock options and SARs (and their average exercise price) excluded because their option exercise prices were greater than the average market price of our common stock:
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- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Accrued Liabilities (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued Liabilities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued Liabilities | Accrued liabilities consisted of:
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- References No definition available.
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- Definition Tabular disclosure of the components of accrued liabilities. No definition available.
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Long-Term Debt And Other Long-Term Liabilities (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-Term Debt | Our long-term debt as of the dates indicated consisted of the following:
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| Other Long-Term Liabilities | Other long-term liabilities consisted of the following:
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| Capital leases | Future payments required under the capital leases at September 30, 2018 are:
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of other liabilities. No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of future minimum lease payments as of the date of the latest balance sheet presented, in aggregate and for each of the five years succeeding fiscal years, with separate deductions from the total for the amount representing executor costs, including any profit thereon, included in the minimum lease payments and for the amount of the imputed interest necessary to reduce the net minimum lease payments to present value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Asset Retirement Obligations (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Asset Retirement Obligation Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Asset Retirement Obligations | The following table shows certain information about our AROs for the periods indicated:
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-Based Compensation (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Restricted Stock Awards and Stock Options | For restricted stock awards and stock options, we had:
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| Schedule of Fair Value of the Restricted Stock Awards Granted During the Periods | This table shows the fair value of restricted stock awards granted to employees and non-employee directors during the periods indicated:
_______________________
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| X | ||||||||||
- Definition Schedule Of Fair Value Of The Restricted Stock Awards Granted During The Period [Text Block]. No definition available.
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| X | ||||||||||
- Definition Schedule of Restricted Stock Awards, Stock Options, and SAR [Table Text Block] No definition available.
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| X | ||||||||||
- References No definition available.
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Derivatives (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivatives outstanding | At September 30, 2018, these derivatives were outstanding:
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| Subsequent schedule of derivatives outstanding | After September 30, 2018, the following derivatives were entered into:
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| Fair Value of Derivative Instruments and Locations in Balance Sheets | The following tables present the fair values and locations of the derivative transactions recorded in our Unaudited Condensed Consolidated Balance Sheets:
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| Effect of Derivative Instruments Recognized in Income Statements, Derivative Instruments | Following is the effect of derivative instruments on the Unaudited Condensed Consolidated Income Statements for the three months ended September 30:
Following is the effect of derivative instruments on the Unaudited Condensed Consolidated Income Statements for the nine months ended September 30:
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| X | ||||||||||
- Definition [Table Text Block] for Schedule of subsequent derivatives outstanding [Table] No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure for cash flow hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure for other derivative instruments not designated as hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair Value Measurements (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value of Available-for-sale Securities | The following is a summary of available-for-sale securities:
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| Recurring Fair Value Measurements | The following tables set forth our recurring fair value measurements:
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| Reconciliations Of Level 3 Fair Value Measurements | The following table is a reconciliation of our level 3 fair value measurements:
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| Schedule Of Quantitative Information About Unobservable Inputs | The following table provides quantitative information about our Level 3 unobservable inputs at September 30, 2018:
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| X | ||||||||||
- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of quantitative information about the inputs used in the fair value measurement of assets. This disclosure may include, but is not limited to, the fair value of the asset, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Variable Interest Entity Arrangements (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Variable Interest Entity Arrangements [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Assets and Liabilities | The carrying value of Superior's assets and liabilities, after eliminations of any intercompany transactions and balances, in the consolidated balance sheets were as follows:
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| X | ||||||||||
- Definition Variable Interest Entity Arrangements [Abstract] No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Equity (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accumulated Other Comprehensive Income | Components of accumulated other comprehensive income (loss) were as follows for the three months ended September 30:
_______________________
Components of accumulated other comprehensive income (loss) were as follows for the nine months ended September 30:
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| Reclassification Out of Accumulated Other Comprehensive Income | Changes in accumulated other comprehensive income by component, net of tax, for the nine months ended September 30 are as follows:
_______________________
Changes in accumulated other comprehensive income (loss) by component, net of tax, for the three months ended September 30 are as follows:
_______________________
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Industry Segment Information (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Industry segment information | The following tables provide certain information about the operations of each of our segments:
_______________________
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| X | ||||||||||
- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
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Supplemental Condensed Consolidating Financial Information (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Condensed Consolidated Financial Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Condensed Consolidating Balance Sheets (Unaudited) | Condensed Consolidating Balance Sheets (Unaudited)
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| Condensed Consolidating Statements of Income (Unaudited) | Condensed Consolidating Statements of Income (Unaudited)
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| Condensed Consolidating Statements of Comprehensive Income (Unaudited) | Condensed Consolidating Statements of Comprehensive Income (Unaudited)
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| Condensed Consolidating Statements of Cash Flows (Unaudited) | Condensed Consolidating Statements of Cash Flows (Unaudited)
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- Definition Supplemental Condensed Consolidated Financial Information [Abstract] No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of condensed statement of comprehensive income (loss) including, but not limited to, statements of comprehensive income (loss) of consolidated entities and consolidation eliminations. No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations. No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of condensed cash flow statement, including, but not limited to, cash flow statements of consolidated entities and consolidation eliminations. No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of condensed income statement, including, but not limited to, income statements of consolidated entities and consolidation eliminations. No definition available.
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Basis of Preparation and Presentation (Narrative) (Details) |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2018 |
Dec. 31, 2017 |
|
| Basis of Preparation and Presentation [Abstract] | ||
| Consolidation, Variable Interest Entity, Policy [Policy Text Block] | We consolidate the activities of Superior Pipeline Company, L.L.C. (Superior), a 50/50 joint venture between Unit Corporation and SP Investor Holdings, LLC, which qualifies as a VIE under generally accepted accounting principles in the United States (GAAP). We have concluded that we are the primary beneficiary of the VIE, as defined in the accounting standards, since we have the power, through our 50% ownership, to direct those activities that most significantly affect the economic performance of Superior as further described in Note 13 – Variable Interest Entity Arrangements. | |
| Federal Statutory Income Tax Rate, Percent | 24.50% | 37.75% |
| X | ||||||||||
- Definition Basis of Preparation and Presentation [Abstract] No definition available.
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| X | ||||||||||
- Definition Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Revenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Costs incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate revenue during the period related to oil and gas business activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax of cumulative effect of restatement on the opening retained earnings of the earliest year presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Revenue from Contracts with Customers (Contract with Customer, Asset and Liability) (Details) - USD ($) $ in Thousands |
9 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Jan. 01, 2018 |
Dec. 31, 2017 |
|
| Adoption of ASC606 [Line Items] | ||||
| Contract liability | $ 10,605 | $ 0 | ||
| Change in contract assets (liabilities), net | (3,671) | $ 0 | ||
| Mid-Stream [Member] | ||||
| Adoption of ASC606 [Line Items] | ||||
| Contract assets | 12,589 | $ 10,798 | ||
| Change in contract assets | 1,791 | |||
| Contract liability | 10,605 | 12,485 | ||
| Change in contract liabilities | (1,880) | |||
| Contract assets (liabilities), net | 1,984 | $ (1,687) | ||
| Change in contract assets (liabilities), net | $ (3,671) | |||
| X | ||||||||||
- Definition Change in contract liabilities, net No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability, Net No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
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Revenue from Contracts with Customer (Narrative) (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2018
USD ($)
|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2018
USD ($)
contract
|
Sep. 30, 2017
USD ($)
|
Jan. 01, 2018
USD ($)
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Dec. 31, 2017
USD ($)
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|||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Retained earnings | $ 830,680 | $ 830,680 | $ 798,128 | $ 799,402 | ||||||||
| Gas gathering and processing revenues | 57,823 | $ 51,399 | 167,926 | $ 150,493 | ||||||||
| Net income | 21,123 | 3,705 | 37,138 | 28,693 | ||||||||
| Income from operations | 40,191 | 18,027 | $ 100,787 | 58,551 | ||||||||
| Drilling [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Revenue Satisfied over Time, Method Used | At inception, the total transaction price will be estimated to include any applicable fixed consideration, unconstrained variable consideration (estimated day rate mobilization and demobilization revenue, estimated operating day rate revenue to be earned over the contract term, expected bonuses (if material and can be reasonably estimated without significant reversal), and penalties (if material and can be reasonably estimated without significant reversal)). Allocation rules under this new standard allow us to recognize revenues associated with our drilling contacts in materially the same manner as under the previous revenue accounting standard. A contract liability will be recorded for consideration received before the corresponding transfer of services. Those liabilities will generally only arise in relation to upfront mobilization fees paid in advance and are allocated/recognized over the entire performance obligation. Such balances will be amortized over the recognition period based on the same method of measure used for revenue. | |||||||||||
| Number of Contracts, Daywork | contract | 34 | |||||||||||
| Revenue, Practical Expedient, Initial Application and Transition, Qualitative Assessment | The majority of our drilling contracts have an original term of less than one year; however, the remaining performance obligations under the contracts that have a longer duration are not material. | |||||||||||
| Gas gathering and processing revenues | 0 | [1] | 0 | $ 0 | [2] | 0 | ||||||
| Oil and Natural Gas [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Revenue Satisfied at Point in Time, Transfer of Control | Revenues from sales we make are recognized when our customer obtains control of the sold product. For sales to other mid-stream and downstream oil and gas companies, this would occur at a point in time, typically on delivery to the customer. | |||||||||||
| Gas gathering and processing revenues | 0 | [1] | 0 | $ 0 | [2] | 0 | ||||||
| Mid-Stream [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Revenue Satisfied over Time, Method Used | Contract terms range from a single month to terms spanning a decade or more, some include evergreen provisions. Fees for mid-stream services (gathering, transportation, processing) are performance obligations and meet the criteria of over time recognition which could be considered a series of distinct performance obligations that represents one overall performance obligation of gas gathering and processing services. | |||||||||||
| Revenue, Practical Expedient, Initial Application and Transition, Qualitative Assessment | As stated previously, the contract term for mid-stream services is typically longer than one year. However, based on the guidance at 606-10-32-40, we determined some of the variable payment in mid-stream service agreements specifically relates to the entity’s efforts to satisfy the performance obligation and that “allocating the variable amount entirely to the distinct good or service is consistent with the allocation objective in paragraph 606-10-32-28.” Therefore, the practical expedient relates to this variable consideration: the commodity fee and the gathering fee. | |||||||||||
| Gas gathering and processing revenues | 82,882 | [1] | $ 69,057 | $ 232,938 | [2] | $ 198,632 | ||||||
| Minimum [Member] | Drilling [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Contract Duration | 6 months | |||||||||||
| Number of Days for Drilling of Wells | 10 days | |||||||||||
| Minimum [Member] | Mid-Stream [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Contract Duration | 5 years | |||||||||||
| Remaining Term of Contract | 4 years | |||||||||||
| Maximum [Member] | Drilling [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Contract Duration | 3 years | |||||||||||
| Number of Days for Drilling of Wells | 90 days | |||||||||||
| Maximum [Member] | Mid-Stream [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Contract Duration | 10 years | |||||||||||
| Remaining Term of Contract | 5 years | |||||||||||
| Short-term Contract with Customer [Member] | Drilling [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Contract Duration | 2 months | |||||||||||
| Long-term Contract with Customer [Member] | Drilling [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Contract Duration | 3 years | |||||||||||
| Number of Contracts, Daywork | contract | 21 | |||||||||||
| Adjustments due to ASC606 [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Gas gathering and processing revenues | 1,300 | $ 3,671 | ||||||||||
| Net income | 982 | 2,772 | ||||||||||
| Adjustments due to ASC606 [Member] | Drilling [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Retained earnings | 0 | |||||||||||
| Adjustments due to ASC606 [Member] | Oil and Natural Gas [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Retained earnings | 0 | |||||||||||
| Net income | 0 | 0 | ||||||||||
| Income from operations | 0 | 0 | ||||||||||
| Adjustments due to ASC606 [Member] | Mid-Stream [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Retained earnings | $ 1,498 | $ 1,498 | ||||||||||
| Adjustment to opening retained earnings, before tax | (1,687) | |||||||||||
| Adjustment to opening retained earnings, after tax | $ (1,274) | |||||||||||
| Gathering service contracts [Member] | Minimum [Member] | Mid-Stream [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Remaining Term of Contract | 1 year | |||||||||||
| Gathering service contracts [Member] | Maximum [Member] | Mid-Stream [Member] | ||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||
| Remaining Term of Contract | 15 years | |||||||||||
| ||||||||||||
| X | ||||||||||
- Definition Contract Duration No definition available.
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| X | ||||||||||
- Definition Number of Days for Drilling of Wells No definition available.
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| X | ||||||||||
- Definition Number of Contracts, Daywork No definition available.
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| X | ||||||||||
- Definition Revenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount before tax of cumulative effect of restatement on the opening retained earnings of the earliest year presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax of cumulative effect of restatement on the opening retained earnings of the earliest year presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of judgment made in evaluating when customer obtains control of promised good or service for performance obligation satisfied at point in time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of method used to recognize revenue for performance obligation that is satisfied over time. Includes, but not is limited to, output or input method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of assessment of estimated effect of practical expedients elected under initial application of retrospective method for completed contracts, completed contracts with variable consideration, modified contracts and disclosures of remaining performance obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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Divestitures (Narrative) (Details) - USD ($) $ in Millions |
9 Months Ended | ||
|---|---|---|---|
Apr. 03, 2018 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Divestitures [Line Items] | |||
| Proceeds from non-core oil and natural gas asset sales, net of related expenses | $ 22.3 | $ 18.0 | |
| Ownership interest in Superior Pipeline Company, L.L.C. [Member] | |||
| Divestitures [Line Items] | |||
| Ownership interest sold | 50.00% | ||
| Proceeds from sale of non-controlling interest | $ 300.0 | ||
| X | ||||||||||
- Definition Represents a sale by the parent of a portion of its equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The sale of the equity interest represented by this element does not result in a loss of control by the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available.
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| X | ||||||||||
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Definition Incremental Per Share Effect Of Dilutive Income Changes Over Dilutive Share Changes No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Earnings Per Share (Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share) (Details) - Stock options and SARs - $ / shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Antidilutive securities excluded from computation of earnings per share | 66,500 | 178,755 | 66,500 | 178,755 |
| Average exercise price | $ 44.42 | $ 47.75 | $ 44.42 | $ 47.75 |
| X | ||||||||||
- Definition The average exercise price of stock options and SARs that were excluded from the EPS calculation because their option exercise prices were greater than the average market price of our common stock. No definition available.
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| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
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Accrued Liabilities (Accrued Liabilities) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Accrued Liabilities [Abstract] | ||
| Employee costs | $ 17,880 | $ 19,521 |
| Interest payable | 17,446 | 6,745 |
| Lease operating expenses | 11,474 | 11,819 |
| Taxes | 10,317 | 3,404 |
| Derivative settlements | 3,383 | 0 |
| Third-party credits | 2,099 | 2,240 |
| Other | 5,144 | 4,794 |
| Total accrued liabilities | $ 67,743 | $ 48,523 |
| X | ||||||||||
- Definition Accrued Derivative Settlements No definition available.
|
| X | ||||||||||
- Definition Accrued Oil And Gas Production Expense Current No definition available.
|
| X | ||||||||||
- Definition Accounts receivable credit balance transferred to liabilities No definition available.
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Long-Term Debt And Other Long-Term Liabilities (Long-Term Debt) (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2018 |
Dec. 31, 2017 |
|
| Debt Instrument [Line Items] | ||
| 6.625% senior subordinated notes due 2021 | $ 650,000 | $ 650,000 |
| Total principal amount | 650,000 | 828,000 |
| Less: unamortized discount | (1,780) | (2,234) |
| Less: debt issuance costs, net | (4,299) | (5,490) |
| Total long-term debt | $ 643,921 | 820,276 |
| Interest percentage of senior subordinated notes | 6.625% | |
| Debt instrument maturity date | May 15, 2021 | |
| 6.625% Senior Subordinated Notes Due 2021 [Member] | ||
| Debt Instrument [Line Items] | ||
| 6.625% senior subordinated notes due 2021 | $ 650,000 | |
| Unit Credit Agreement [Member] | ||
| Debt Instrument [Line Items] | ||
| Credit agreement | $ 0 | $ 178,000 |
| Revolving credit facility interest rate | 0.00% | 3.40% |
| Superior Credit Agreement [Member] | ||
| Debt Instrument [Line Items] | ||
| Credit agreement | $ 0 | $ 0 |
| Revolving credit facility interest rate | 0.00% | 0.00% |
| X | ||||||||||
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount, after accumulated amortization, of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The effective interest rate at the end of the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
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Long-Term Debt And Other Long-Term Liabilities (Other Long-Term Liabilities) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Jan. 01, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|---|---|---|
| Debt Disclosure [Abstract] | |||||
| Asset retirement obligation (ARO) liability | $ 62,727 | $ 69,444 | $ 75,485 | $ 70,170 | |
| Workers' compensation | 12,832 | 13,340 | |||
| Capital lease obligations | 12,355 | 15,224 | |||
| Contract liability | 10,605 | 0 | |||
| Separation benefit plans | 8,135 | 6,524 | |||
| Deferred compensation plan | 5,623 | 5,390 | |||
| Gas balancing liability | 3,283 | 3,283 | |||
| Other liabilities | 115,560 | 113,205 | |||
| Current portion of other long-term liabilities | 14,150 | $ 15,750 | 13,002 | ||
| Other long-term liabilities | $ 101,410 | $ 109,940 | $ 100,203 |
| X | ||||||||||
- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. No definition available.
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| X | ||||||||||
- Definition The value of gas balancing asset or liability as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of obligations incurred for employer-related costs classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Long-Term Debt And Other Long-Term Liabilities (Capital Leases) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Beginning October 1, | ||
| 2018 | $ 6,195 | |
| 2019 | 6,195 | |
| 2020 | 5,322 | |
| Total future payments | 17,712 | |
| Less payments related to: | ||
| Maintenance | 4,601 | |
| Interest | 756 | |
| Present value of future minimum payments | $ 12,355 | $ 15,224 |
| X | ||||||||||
- Definition Ending March 31, No definition available.
|
| X | ||||||||||
- Definition Less payments related to: No definition available.
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| X | ||||||||||
- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount necessary to reduce net minimum lease payments to present value for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Capital lease percentage of fair market value to purchase assets at end of term No definition available.
|
| X | ||||||||||
- Definition Capital leases, future minimum payments, average annual payment No definition available.
|
| X | ||||||||||
- Definition Capital lease term No definition available.
|
| X | ||||||||||
- Definition Consolidated EBITDA to interest expense ratio No definition available.
|
| X | ||||||||||
- Definition Current ratio of credit facility. No definition available.
|
| X | ||||||||||
- Definition Debt Instrument, Variable Interest Rate, Payable Assessment Period No definition available.
|
| X | ||||||||||
- Definition Discount rate capital leases No definition available.
|
| X | ||||||||||
- Definition Funded debt to consolidated EBITDA ratio No definition available.
|
| X | ||||||||||
- Definition Interest rate in addition to LIBOR. No definition available.
|
| X | ||||||||||
- Definition Leverage Ratio Of Long Term Debt To Consolidated EBITDA No definition available.
|
| X | ||||||||||
- Definition Loan origination fees paid to date. These fees are being amortized over the life of the agreement. No definition available.
|
| X | ||||||||||
- Definition Number of compressors under capital lease agreement No definition available.
|
| X | ||||||||||
- Definition Oil and Gas Property, Full Cost Method, Discount Percentage No definition available.
|
| X | ||||||||||
- Definition Percentage of collateral pledged No definition available.
|
| X | ||||||||||
- Definition Senior notes repurchase price in percentage for change of control. No definition available.
|
| X | ||||||||||
- Definition Amount of capital lease obligation due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount necessary to reduce net minimum lease payments to present value for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of restrictions on the entity's other assets as required by the terms of the credit facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Discussion of whether the borrowings under the credit facility are secured or unsecured and, if secured, a description of collateral (for example, accounts receivable less than 120 days old, finished goods inventory). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. No definition available.
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| X | ||||||||||
- Definition Identification of whether the entity has been in compliance with any credit facility debt covenants during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of restrictions on the entity's ability to pay dividends as required by the terms of the credit facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Date the credit facility first became available, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Principal amount of long-term debt and capital lease obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
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| X | ||||||||||
- Definition Principal amount of long-term debt and capital lease obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
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| X | ||||||||||
- Definition Principal amount of long-term debt and capital lease obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
|
| X | ||||||||||
- Definition Principal amount of long-term debt and capital lease obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
|
| X | ||||||||||
- Definition Principal amount of long-term debt and capital lease obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
|
| X | ||||||||||
- Definition Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The total of the cash outflow during the period which has been paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt and the cost incurred directly for the issuance of equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Date the relationship between reporting entity and the Variable Interest Entity (VIE) began, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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| X | ||||||||||
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Asset Retirement Obligations (Schedule Of Asset Retirement Obligations) (Details) - USD ($) $ in Thousands |
9 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
|||
| Asset Retirement Obligation Disclosure [Abstract] | ||||
| ARO liability, January 1: | $ 69,444 | $ 70,170 | ||
| Accretion of discount | 1,829 | 2,112 | ||
| Liability incurred | 244 | 1,123 | ||
| Liability settled | (3,907) | (1,350) | ||
| Liability sold | (105) | (1,563) | ||
| Revision of estimates | [1] | (4,778) | 4,993 | |
| ARO liability, September 30: | 62,727 | 75,485 | ||
| Less current portion | 1,451 | 2,947 | ||
| Total long-term ARO | $ 61,276 | $ 72,538 | ||
| ||||
| X | ||||||||||
- Definition Asset Retirement Obligation, Liabilities Sold No definition available.
|
| X | ||||||||||
- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of asset retirement obligations incurred during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Stock-Based Compensation (Schedule of Restricted Stock Awards and Stock Options) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Abstract] | ||||
| Recognized stock compensation expense | $ 4.1 | $ 3.2 | $ 13.6 | $ 9.0 |
| Capitalized stock compensation cost for our oil and natural gas properties | 0.6 | 0.5 | 1.6 | 1.3 |
| Tax benefit on stock based compensation | $ 1.0 | $ 1.2 | $ 3.3 | $ 3.4 |
| X | ||||||||||
- Definition Share-based Compensation Arrangement by Share-based Payment Award [Abstract] No definition available.
|
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Share based compensation arrangement by share based payment award estimated fair value. No definition available.
|
| X | ||||||||||
- Definition Share based compensation arrangement by share based payment award percentage of shares expected to be distributed. No definition available.
|
| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
May 06, 2015 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Unrecognized compensation cost related to unvested awards | $ 19.0 | $ 19.0 | |||
| Unrecognized compensation cost, expected to be capitalized | $ 2.4 | $ 2.4 | |||
| Weighted average years over which this cost will be recognized | 1 year | ||||
| Increase in stock compensation expense due to the restricted stock awards granted | $ 7.5 | ||||
| Stock Appreciation Rights (SARs) [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Shares granted | 0 | 0 | 0 | 0 | |
| Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Number of shares authorized | 7,230,000 | ||||
| Incentive Stock Options [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Number of shares authorized | 2,000,000 | ||||
| Employee Stock Option [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Stock options granted | 0 | 0 | 0 | 0 | |
| Stock Performance Measures [Member] | Minimum [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 0.00% | ||||
| Stock Performance Measures [Member] | Maximum [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 200.00% | ||||
| Cash flow to total assets performance [Member] | Minimum [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 0.00% | ||||
| Cash flow to total assets performance [Member] | Maximum [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 200.00% | ||||
| Cash flow to total assets performance [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 100.00% | ||||
| Time Vested [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years | ||||
| Shares granted | 888,810 | 524,903 | |||
| Performance Shares [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Shares granted | 362,070 | 173,373 | |||
| Performance Shares [Member] | Cash flow to total assets performance [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years | ||||
| Cliff vest [Member] | Performance Shares [Member] | Stock Performance Measures [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years | ||||
| 2018 [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 49.00% | ||||
| 2017 [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 92.00% | ||||
| 2016 [Member] | Restricted Stock [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Performance percentage criteria | 170.00% | ||||
| X | ||||||||||
- Definition Employee service share based compensation allocation of unrecognized period costs capitalized amount. No definition available.
|
| X | ||||||||||
- Definition Increase in stock compensation expense due to the restricted stock awards granted. No definition available.
|
| X | ||||||||||
- Definition Performance percentage criteria. No definition available.
|
| X | ||||||||||
- Definition Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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Derivatives (Schedule of Derivatives Outstanding) (Details) |
9 Months Ended |
|---|---|
|
Sep. 30, 2018
$ / Unit
MMBTU
bbl
| |
| Swap [Member] | Oct'18 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member] | |
| Derivative [Line Items] | |
| Weighted average price | 3.005 |
| Hedged volume (MMBtu/day) | MMBTU | 30,000 |
| Swap [Member] | Oct'18 - Dec'18 [Member] | Crude Oil [Member] | WTI - NYMEX [Member] | |
| Derivative [Line Items] | |
| Weighted average price | 53.52 |
| Hedged volume (Bbl/day) | bbl | 4,000 |
| Swap [Member] | Nov'18 - Dec'18 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member] | |
| Derivative [Line Items] | |
| Weighted average price | 3.013 |
| Hedged volume (MMBtu/day) | MMBTU | 20,000 |
| Swap [Member] | Jan'19 - Dec'19 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member] | |
| Derivative [Line Items] | |
| Weighted average price | 2.810 |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 |
| Price Risk Derivative [Member] | Oct'18 - Dec'18 [Member] | Crude Oil [Member] | LLS/WTI [Member] | |
| Derivative [Line Items] | |
| Weighted average price | 7.00 |
| Hedged volume (Bbl/day) | bbl | 500 |
| Basis swap [Member] | Oct'18 [Member] | Natural Gas [Member] | NGPL Texok [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.190) |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 |
| Basis swap [Member] | Oct'18 - Dec'18 [Member] | Natural Gas [Member] | NGPL Midcon [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.568) |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 |
| Basis swap [Member] | Oct'18 - Dec'18 [Member] | Natural Gas [Member] | PEPL [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.678) |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 |
| Basis swap [Member] | Nov'18 - Dec'18 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.208) |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 |
| Basis swap [Member] | Jan'19 - Dec'19 [Member] | Natural Gas [Member] | NGPL Midcon [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.625) |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 |
| Basis swap [Member] | Jan'19 - Dec'19 [Member] | Natural Gas [Member] | NGPL Texok [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.265) |
| Hedged volume (MMBtu/day) | MMBTU | 30,000 |
| Basis swap [Member] | Jan'19 - Dec'19 [Member] | Natural Gas [Member] | PEPL [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.659) |
| Hedged volume (MMBtu/day) | MMBTU | 20,000 |
| Basis swap [Member] | Jan'20 - Dec'20 [Member] | Natural Gas [Member] | NGPL Texok [Member] | |
| Derivative [Line Items] | |
| Weighted average price | (0.275) |
| Hedged volume (MMBtu/day) | MMBTU | 30,000 |
| Three-way collar [Member] | Oct'18 - Dec'18 [Member] | Crude Oil [Member] | WTI - NYMEX [Member] | |
| Derivative [Line Items] | |
| Hedged volume (Bbl/day) | bbl | 2,000 |
| Cap Price | 56.08 |
| Subfloor price | 37.50 |
| Floor Price | 47.50 |
| Three-way collar [Member] | Oct'18 - Dec'18 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member] | |
| Derivative [Line Items] | |
| Hedged volume (MMBtu/day) | MMBTU | 20,000 |
| Cap Price | 3.51 |
| Subfloor price | 2.50 |
| Floor Price | 3.00 |
| Three-way collar [Member] | Jan'19 - Dec'19 [Member] | Crude Oil [Member] | WTI - NYMEX [Member] | |
| Derivative [Line Items] | |
| Hedged volume (Bbl/day) | bbl | 4,000 |
| Cap Price | 72.93 |
| Subfloor price | 51.25 |
| Floor Price | 61.25 |
| X | ||||||||||
- Definition Non Designated Derivative Instrument Weighted Average Fixed Price For Swaps No definition available.
|
| X | ||||||||||
- Definition Not Designated as Hedging Instrument Hedged Volume of Natural Gas No definition available.
|
| X | ||||||||||
- Definition Not Designated as Hedging Instrument Hedged Volume of Oil No definition available.
|
| X | ||||||||||
- Definition The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. No definition available.
|
| X | ||||||||||
- Definition Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The strike price on the price risk option contract such as a put option or a call option. No definition available.
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Derivatives (Subsequent Schedule of Derivatives Outstanding) (Details) - Natural Gas [Member] - IF - NYMEX (HH) [Member] |
1 Months Ended | 9 Months Ended |
|---|---|---|
|
Nov. 06, 2018
$ / Unit
MMBTU
|
Sep. 30, 2018
$ / Unit
MMBTU
|
|
| Swap [Member] | Jan'19 - Dec'19 [Member] | ||
| Derivative [Line Items] | ||
| Weighted average price | 2.810 | |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 | |
| Subsequent Event [Member] | Swap [Member] | Jan'19 - Dec'19 [Member] | ||
| Derivative [Line Items] | ||
| Weighted average price | 2.850 | |
| Hedged volume (MMBtu/day) | MMBTU | 10,000 | |
| Subsequent Event [Member] | Collar [Member] | Jan'19 - Dec'19 [Member] | ||
| Derivative [Line Items] | ||
| Hedged volume (MMBtu/day) | MMBTU | 20,000 | |
| Floor Price | 2.63 | |
| Cap Price | 3.03 | |
| Subsequent Event [Member] | Three-way collar [Member] | Jan'19 - Mar'19 [Member] | ||
| Derivative [Line Items] | ||
| Hedged volume (MMBtu/day) | MMBTU | 10,000 | |
| Floor Price | 3.00 | |
| Cap Price | 4.35 | |
| Subfloor price | 2.75 |
| X | ||||||||||
- Definition Non Designated Derivative Instrument Weighted Average Fixed Price For Swaps No definition available.
|
| X | ||||||||||
- Definition Not Designated as Hedging Instrument Hedged Volume of Natural Gas No definition available.
|
| X | ||||||||||
- Definition The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. No definition available.
|
| X | ||||||||||
- Definition Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The strike price on the price risk option contract such as a put option or a call option. No definition available.
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Derivatives (Fair Value of Derivative Instruments and Locations in Balance Sheets) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
| Current derivative asset | $ 0 | $ 721 |
| Non-current derivative asset | 0 | 0 |
| Total derivatives assets | 0 | 721 |
| Current derivative liability | (13,067) | (7,763) |
| Non-current derivative liability | (1,542) | 0 |
| Total derivative liabilities | $ (14,609) | $ (7,763) |
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Derivatives (Effect of Derivative Instruments Recognized in Income Statements, Derivative Instruments) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Gain (loss) on derivatives | $ (4,385) | $ (2,614) | $ (25,608) | $ 21,019 | ||||||||
| Commodity Derivatives [Member] | ||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Gain (loss) on derivatives | (4,385) | (2,614) | (25,608) | 21,019 | ||||||||
| Amount of gains (loss) settled during the period | (9,100) | 800 | (18,000) | (700) | ||||||||
| Gain (loss) on derivatives [Member] | Commodity Derivatives [Member] | ||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Gain (loss) on derivatives | $ (4,385) | [1] | $ (2,614) | [1] | $ (25,608) | [2] | $ 21,019 | [2] | ||||
| ||||||||||||
| X | ||||||||||
- Definition Derivative Instruments Not Designated as Hedges Amount Gain (Loss) Settled During Period No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
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Fair Value Measurements (Fair Value of Available-for-sale Securities) (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2018 |
Dec. 31, 2017 |
|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | $ 830 | $ 830 |
| Gross unrealized gains | 0 | 102 |
| Gross unrealized losses | 137 | 0 |
| Available-for-sale Securities [Member] | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Estimated fair value | 693 | 932 |
| Available-for-sale Securities [Member] | Level 1 [Member] | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Estimated fair value | $ 693 | $ 932 |
| X | ||||||||||
- Definition This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. No definition available.
|
| X | ||||||||||
- Definition Amount of unrealized gain before deducting unrealized loss on investments in equity securities classified as available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of equity securities categorized neither as held-to-maturity nor as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
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Fair Value Measurements (Recurring Fair Value Measurements) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Derivative Asset | $ 0 | $ 721 |
| Derivative Liability | (14,609) | (7,763) |
| Financial assets (liabilities) | (13,916) | (6,110) |
| Level 1 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | 693 | 932 |
| Level 2 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | (7,090) | (6,836) |
| Level 3 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | (7,519) | (206) |
| Effect of Netting [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | 0 | 0 |
| Commodity Derivatives [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Derivative Asset | 0 | 721 |
| Derivative Liability | (14,609) | (7,763) |
| Total commodity derivatives | (14,609) | (7,042) |
| Commodity Derivatives [Member] | Level 1 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Gross Assets | 0 | 0 |
| Gross Liabilities | 0 | 0 |
| Total commodity derivatives | 0 | 0 |
| Commodity Derivatives [Member] | Level 2 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Gross Assets | 1,282 | 2,137 |
| Gross Liabilities | (8,372) | (8,973) |
| Total commodity derivatives | (7,090) | (6,836) |
| Commodity Derivatives [Member] | Level 3 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Gross Assets | 88 | 3,344 |
| Gross Liabilities | (7,607) | (3,550) |
| Total commodity derivatives | (7,519) | (206) |
| Commodity Derivatives [Member] | Effect of Netting [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Effect of netting on assets | (1,370) | (4,760) |
| Effect of netting on liabilities | 1,370 | 4,760 |
| Total commodity derivatives | 0 | 0 |
| Available-for-sale Securities [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Equity securities | 693 | 932 |
| Available-for-sale Securities [Member] | Level 1 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Equity securities | 693 | 932 |
| Available-for-sale Securities [Member] | Level 2 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Equity securities | 0 | 0 |
| Available-for-sale Securities [Member] | Level 3 [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Equity securities | 0 | 0 |
| Available-for-sale Securities [Member] | Effect of Netting [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Equity securities | $ 0 | $ 0 |
| X | ||||||||||
- Definition Effect of netting on Assets No definition available.
|
| X | ||||||||||
- Definition Effect of netting on liabilities No definition available.
|
| X | ||||||||||
- Definition Amount of equity securities categorized neither as held-to-maturity nor as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Fair value of asset after deduction of liability. No definition available.
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| X | ||||||||||
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| X | ||||||||||
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| X | ||||||||||
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| X | ||||||||||
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Fair Value Measurements (Reconciliations Of Level 3 Fair Value Measurements) (Details) - Level 3 [Member] - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||||
| Beginning of period | $ (6,135) | $ 4,093 | $ (206) | $ (7,122) | ||
| Included in earnings | [1] | (3,700) | (2,015) | (12,324) | 9,102 | |
| Settlements | 2,316 | (592) | 5,011 | (494) | ||
| End of period | (7,519) | 1,486 | (7,519) | 1,486 | ||
| Total gains (losses) for the period included in earnings attributable to the change in unrealized gain relating to assets still held at end of period | $ (1,384) | $ (2,607) | $ (7,313) | $ 8,608 | ||
| ||||||
| X | ||||||||||
- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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Fair Value Measurements (Schedule Of Quantitative Information About Unobservable Inputs) (Details) - Level 3 [Member] - Three-way collar [Member] $ in Thousands |
9 Months Ended | |||
|---|---|---|---|---|
|
Sep. 30, 2018
USD ($)
$ / Unit
|
[1] | |||
| Oil [Member] | ||||
| Derivative fair value | $ | $ (7,607) | |||
| Derivatives Valuation Technique(s) | Discounted cash flow | |||
| Unobservable Input | Forward commodity price curve | |||
| Oil [Member] | Minimum [Member] | ||||
| Forward commodity price curve | 0.00 | |||
| Oil [Member] | Maximum [Member] | ||||
| Forward commodity price curve | 17.65 | |||
| Natural Gas [Member] | ||||
| Derivative fair value | $ | $ 88 | |||
| Derivatives Valuation Technique(s) | Discounted cash flow | |||
| Unobservable Input | Forward commodity price curve | |||
| Natural Gas [Member] | Minimum [Member] | ||||
| Forward commodity price curve | 0.00 | |||
| Natural Gas [Member] | Maximum [Member] | ||||
| Forward commodity price curve | 0.12 | |||
| ||||
| X | ||||||||||
- Definition Fair Value Assets Unobservable Input Description No definition available.
|
| X | ||||||||||
- Definition Forward Commodity Price Curve No definition available.
|
| X | ||||||||||
- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Description of the inputs and valuation technique(s) used to measure fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Collateral posted | $ 0 | |
| 6.625% senior subordinated notes due 2021 | 643,900 | $ 642,300 |
| Level 2 [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Estimated fair value of long-term debt | 655,500 | 649,700 |
| Unit Credit Agreement [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Line of credit facility, amount outstanding | $ 0 | $ 178,000 |
| X | ||||||||||
- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. No definition available.
|
| X | ||||||||||
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
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Commitments and Contingencies (Narrative) (Details) - USD ($) |
9 Months Ended | |
|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Long-term Purchase Commitment [Line Items] | ||
| Operating Leases, Future Minimum Payments Due, Next Twelve Months | $ 5,100,000 | |
| Operating Leases, Future Minimum Payments, Due in Two Years | 2,100,000 | |
| Operating Leases, Future Minimum Payments, Due in Three Years | 600,000 | |
| Operating Leases, Future Minimum Payments, Due in Four Years | 100,000 | |
| Operating Leases, Rent Expense, Net | $ 7,200,000 | $ 6,400,000 |
| Number of compressors under capital lease agreement | 20 | |
| Capital lease term | 7 years | |
| Capital Leases, Future Minimum Payments Due, Next Twelve Months | $ 6,195,000 | |
| Capital Leases, Future Minimum Payments Due in Two Years | 6,195,000 | |
| Capital Leases, Future Minimum Payments Due in Three Years | 5,322,000 | |
| Maintenance | 4,601,000 | |
| Interest | 756,000 | |
| Capital leases, future minimum payments, average annual payment | $ 4,200,000 | |
| Capital lease fair market value percentage for purchase | 10.00% | |
| Percentage of repurchase of limited units outstanding | 20.00% | |
| Repurchase Of Limited Units Outstanding Amount | $ 1,700 | $ 2,900 |
| Drilling Equipment [Member] | ||
| Long-term Purchase Commitment [Line Items] | ||
| Other Commitment, Due in Next Twelve Months | $ 10,064,000 | |
| Capital Addition Purchase Commitments [Member] | Oil and Natural Gas [Member] | ||
| Long-term Purchase Commitment [Line Items] | ||
| Long-term Purchase Commitment, Description | as part of the Superior transaction, we entered into a contractual obligation that commits us to spend $150.0 million to drill wells in the Granite Wash/Buffalo Wallow area over three years starting January 1, 2019. This amount is already included in our drilling plan. For each dollar of the $150.0 million that we do not spend (over the three year period), we would forgo receiving $0.58 of future distributions from our 50% ownership interest in our consolidated mid-stream subsidiary. If we elected not to drill or spend any money in the designated area over the three year period, the maximum amount we could forgo from distributions would be $87.0 million. | |
| Long-term Purchase Commitment, Amount | $ 150,000,000 | |
| Long-term Purchase Commitment, Period | 3 years | |
| X | ||||||||||
- Definition Capital lease percentage of fair market value to purchase assets at end of term No definition available.
|
| X | ||||||||||
- Definition Capital leases, future minimum payments, average annual payment No definition available.
|
| X | ||||||||||
- Definition Capital lease term No definition available.
|
| X | ||||||||||
- Definition Number of compressors under capital lease agreement No definition available.
|
| X | ||||||||||
- Definition Percentage of repurchase of limited units outstanding No definition available.
|
| X | ||||||||||
- Definition Repurchase of limited units outstanding amount. No definition available.
|
| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount necessary to reduce net minimum lease payments to present value for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. No definition available.
|
| X | ||||||||||
- Definition Describes the terms of a significant arrangement with a supplier (excluding an unconditional purchase obligation) to acquire goods or services over a period of time beyond one year or the normal operating cycle, if longer, which may include identification of the goods or services to be purchased, pricing, effects on pricing of failing to reach minimum quantities required to be purchased, cancellation rights, and termination provisions. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Minimum amount of other commitment maturing in the next fiscal year following the latest fiscal year for commitments not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in this taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. No definition available.
|
| X | ||||||||||
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| X | ||||||||||
- Details
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| X | ||||||||||
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Variable Interest Entity Arrangements (Schedule of Assets and Liabilities) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Jan. 01, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Dec. 31, 2016 |
|||
|---|---|---|---|---|---|---|---|---|
| Current assets: | ||||||||
| Cash and cash equivalents | $ 91,557 | $ 701 | $ 822 | $ 893 | ||||
| Accounts receivable, net of allowance for doubtful accounts | 122,123 | 111,512 | ||||||
| Prepaid expenses and other | 9,419 | 6,233 | ||||||
| Total current assets | 223,604 | 119,672 | ||||||
| Property and equipment: | ||||||||
| Gas gathering and processing equipment | 751,715 | 726,236 | ||||||
| Transportation equipment | 29,103 | 29,631 | ||||||
| Property, plant, and equipment, gross | 8,830,810 | 8,534,192 | ||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 6,325,160 | 6,151,450 | ||||||
| Net property and equipment | 2,505,650 | 2,382,742 | ||||||
| Other assets | 28,703 | $ 27,028 | 16,230 | |||||
| Total assets | 2,820,765 | [1] | 2,581,452 | |||||
| Current liabilities: | ||||||||
| Accounts payable | 143,552 | 112,648 | ||||||
| Accrued liabilities | 67,743 | 48,523 | ||||||
| Current portion of other long-term liabilities | 14,150 | 15,750 | 13,002 | |||||
| Total current liabilities | 239,563 | 181,936 | ||||||
| Long-term debt less debt issuance costs | 643,921 | 820,276 | ||||||
| Other long-term liabilities | 101,410 | $ 109,940 | $ 100,203 | |||||
| VIE [Member] | ||||||||
| Current assets: | ||||||||
| Cash and cash equivalents | 9,039 | |||||||
| Accounts receivable, net of allowance for doubtful accounts | 29,991 | |||||||
| Prepaid expenses and other | 2,756 | |||||||
| Total current assets | 41,786 | |||||||
| Property and equipment: | ||||||||
| Gas gathering and processing equipment | 751,715 | |||||||
| Transportation equipment | 3,064 | |||||||
| Property, plant, and equipment, gross | 754,779 | |||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 353,476 | |||||||
| Net property and equipment | 401,303 | |||||||
| Other assets | 15,411 | |||||||
| Total assets | 458,500 | |||||||
| Current liabilities: | ||||||||
| Accounts payable | 28,183 | |||||||
| Accrued liabilities | 3,574 | |||||||
| Current portion of other long-term liabilities | 6,836 | |||||||
| Total current liabilities | 38,593 | |||||||
| Long-term debt less debt issuance costs | 0 | |||||||
| Other long-term liabilities | 16,126 | |||||||
| Total liabilities | $ 54,719 | |||||||
| ||||||||
| X | ||||||||||
- Definition Natural gas gathering systems and treating plants. No definition available.
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
|
Variable Interest Entity Arrangements (Details) - USD ($) |
9 Months Ended | |
|---|---|---|
Apr. 03, 2018 |
Sep. 30, 2018 |
|
| Variable Interest Entity [Line Items] | ||
| Date Involvement Began | Apr. 03, 2018 | |
| Superior Pipeline Company, L.L.C. [Member] | ||
| Variable Interest Entity [Line Items] | ||
| Date Involvement Began | Apr. 03, 2018 | |
| Methodology for Determining Whether Entity is Primary Beneficiary | The two variable interests applicable to Unit include the 50% equity investment in Superior and the MSA. The MSA houses the power to direct the activities that most significantly impact Superior's operating performance. The MSA is a separate variable interest. Unit through the MSA has the power to direct Superior’s most significant activities; reciprocally the equity investors lack the power to direct the activities that most significantly impact the entity’s economic performance. Because of this, Unit is considered the primary beneficiary. | |
| Lack of Recourse | Superior's creditors have no recourse to our general credit. | |
| SP Investor Holdings, LLC [Member] | Superior Pipeline Company, L.L.C. [Member] | ||
| Variable Interest Entity [Line Items] | ||
| Ownership Percentage | 50.00% | |
| SPC Midstream Operating, L.L.C. [Member] | Superior Pipeline Company, L.L.C. [Member] | ||
| Variable Interest Entity [Line Items] | ||
| Monthly service fee | $ 250,000 |
| X | ||||||||||
- Definition Monthly service fee No definition available.
|
| X | ||||||||||
- Definition The degree to which creditors (or beneficial interest holders) of the Variable Interest Entity (VIE) have recourse against the general credit of the primary beneficiary. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Description of significant judgments and assumptions made by a reporting entity in determining whether it must: (1) consolidate a Variable Interest Entity (VIE) or (2) disclose information about its involvement in a VIE, and may include discussion of the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance is shared among multiple parties such that no one party is the primary beneficiary (as defined) or information about the types of involvements the reporting entity considers significant, supplemented with information about how the significant involvements were considered in determining whether the reporting entity is the primary beneficiary. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Date the relationship between reporting entity and the Variable Interest Entity (VIE) began, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Equity (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|||||||
| Schedule of Accumulated Other Comprehensive Income (Loss) [Abstract] | ||||||||||
| Unrealized appreciation (loss) on securities, before tax | $ (51) | $ 53 | $ (239) | $ 85 | ||||||
| Tax benefit (expense) | 13 | [1] | (20) | 60 | [2] | (32) | ||||
| Unrealized appreciation (loss) on securities, net of tax | $ (38) | $ 33 | $ (179) | $ 53 | ||||||
| ||||||||||
| X | ||||||||||
- Definition Schedule of Accumulated Other Comprehensive Income (Loss) [Abstract] No definition available.
|
| X | ||||||||||
- Definition Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Equity (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Jan. 01, 2018 |
Dec. 31, 2016 |
||||||||
| New Accounting Pronouncement, Early Adoption [Line Items] | |||||||||||||
| Beginning Balance | $ (65) | $ 20 | $ 63 | $ 0 | |||||||||
| Accumulated other comprehensive income (loss) | (65) | 20 | 63 | 0 | $ 63 | $ 0 | |||||||
| Unrealized appreciation (loss) before reclassifications | (38) | [1] | 33 | (179) | [2] | 53 | |||||||
| Amounts reclassified from accumulated other comprehensive income | 0 | 0 | 0 | 0 | |||||||||
| Net current-period other comprehensive income (loss) | (38) | 33 | (179) | 53 | |||||||||
| Ending Balance | $ (103) | $ 53 | $ (103) | $ 53 | |||||||||
| ASU 2018-02 effect | |||||||||||||
| New Accounting Pronouncement, Early Adoption [Line Items] | |||||||||||||
| Adjustment due to ASU 2018-02 | 13 | [2] | $ 0 | ||||||||||
| ASU 2018-02 end balance | |||||||||||||
| New Accounting Pronouncement, Early Adoption [Line Items] | |||||||||||||
| Accumulated other comprehensive income (loss) | $ 76 | ||||||||||||
| |||||||||||||
| X | ||||||||||
- Definition Adjustment due to accounting pronouncement No definition available.
|
| X | ||||||||||
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |
9 Months Ended | 13 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
May 02, 2018 |
Dec. 31, 2017 |
Apr. 04, 2017 |
|
| Class of Stock [Line Items] | |||||
| Common stock, par value | $ 0.20 | $ 0.20 | |||
| Common stock, shares issued | 54,063,705 | 52,880,134 | |||
| Proceeds from issuance of common stock, net of issuance costs | $ 0 | $ 18,623 | |||
| Terminated May 2, 2018 [Member] | At-the-Market Common Stock Program [Member] | |||||
| Class of Stock [Line Items] | |||||
| Common stock, par value | $ 0.20 | ||||
| Aggregate Offering Price | $ 100,000 | ||||
| Proceeds from issuance of common stock, net of issuance costs | $ 18,623 | ||||
| Commission of the gross sales price by share paid percentage | 2.00% | ||||
| ATM Distribution Agreement [Member] | Terminated May 2, 2018 [Member] | At-the-Market Common Stock Program [Member] | |||||
| Class of Stock [Line Items] | |||||
| Common stock, shares issued | 787,547 | ||||
| X | ||||||||||
- Definition Aggregate Offering Price No definition available.
|
| X | ||||||||||
- Definition Commission of the gross sales price by share paid percentage No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
Industry Segment Information (Industry Segment Information) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|||||||
| Revenues: | ||||||||||
| Oil and natural gas | $ 111,623 | $ 85,470 | $ 317,040 | $ 256,241 | ||||||
| Contract drilling | 50,612 | 51,619 | 143,527 | 128,059 | ||||||
| Gas gathering and processing | 57,823 | 51,399 | 167,926 | 150,493 | ||||||
| Total revenues | 220,058 | 188,488 | 628,493 | 534,793 | ||||||
| Operating costs: | ||||||||||
| Oil and natural gas | 32,139 | 33,911 | 100,519 | 95,873 | ||||||
| Contract drilling | 32,032 | 34,747 | 95,593 | 91,213 | ||||||
| Gas gathering and processing | 43,134 | 38,116 | 124,441 | 111,862 | ||||||
| Total operating costs | 107,305 | 106,774 | 320,553 | 298,948 | ||||||
| Depreciation, depletion, and amortization | 63,537 | 54,533 | 178,976 | 151,545 | ||||||
| Total expenses | 170,842 | 161,307 | 499,529 | 450,493 | ||||||
| General and administrative | 9,278 | 9,235 | 28,752 | 26,902 | ||||||
| (Gain) loss on disposition of assets | (253) | (81) | (575) | (1,153) | ||||||
| Income (loss) from operations | 40,191 | 18,027 | 100,787 | 58,551 | ||||||
| Gain (loss) on derivatives | (4,385) | (2,614) | (25,608) | 21,019 | ||||||
| Interest, net | (7,945) | (9,944) | (25,678) | (28,807) | ||||||
| Other | 6 | 5 | 17 | 14 | ||||||
| Income (loss) before income taxes | 27,867 | 5,474 | 49,518 | 50,777 | ||||||
| Oil and Natural Gas [Member] | ||||||||||
| Revenues: | ||||||||||
| Oil and natural gas | 111,623 | [1] | 85,470 | 317,040 | [2] | 256,241 | ||||
| Contract drilling | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Gas gathering and processing | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Total revenues | 111,623 | [1] | 85,470 | 317,040 | [2] | 256,241 | ||||
| Operating costs: | ||||||||||
| Oil and natural gas | 33,400 | 35,082 | 104,234 | 99,349 | ||||||
| Contract drilling | 0 | 0 | 0 | 0 | ||||||
| Gas gathering and processing | 0 | 0 | 0 | 0 | ||||||
| Total operating costs | 33,400 | 35,082 | 104,234 | 99,349 | ||||||
| Depreciation, depletion, and amortization | 35,460 | 26,460 | 97,797 | 71,544 | ||||||
| Total expenses | 68,860 | 61,542 | 202,031 | 170,893 | ||||||
| General and administrative | 0 | 0 | 0 | 0 | ||||||
| (Gain) loss on disposition of assets | (7) | 1 | (136) | (176) | ||||||
| Income (loss) from operations | 42,770 | 23,927 | 115,145 | 85,524 | ||||||
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 | ||||||
| Interest, net | 0 | 0 | 0 | 0 | ||||||
| Other | 0 | 0 | 0 | 0 | ||||||
| Income (loss) before income taxes | 42,770 | 23,927 | 115,145 | 85,524 | ||||||
| Drilling [Member] | ||||||||||
| Revenues: | ||||||||||
| Oil and natural gas | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Contract drilling | 58,012 | [1] | 55,588 | 161,489 | [2] | 137,617 | ||||
| Gas gathering and processing | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Total revenues | 58,012 | [1] | 55,588 | 161,489 | [2] | 137,617 | ||||
| Operating costs: | ||||||||||
| Oil and natural gas | 0 | 0 | 0 | 0 | ||||||
| Contract drilling | 38,246 | 38,115 | 111,121 | 99,794 | ||||||
| Gas gathering and processing | 0 | 0 | 0 | 0 | ||||||
| Total operating costs | 38,246 | 38,115 | 111,121 | 99,794 | ||||||
| Depreciation, depletion, and amortization | 14,889 | 15,280 | 41,927 | 41,896 | ||||||
| Total expenses | 53,135 | 53,395 | 153,048 | 141,690 | ||||||
| General and administrative | 0 | 0 | 0 | 0 | ||||||
| (Gain) loss on disposition of assets | (230) | (68) | (314) | (106) | ||||||
| Income (loss) from operations | 5,107 | 2,261 | 8,755 | (3,967) | ||||||
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 | ||||||
| Interest, net | 0 | 0 | 0 | 0 | ||||||
| Other | 0 | 0 | 0 | 0 | ||||||
| Income (loss) before income taxes | 5,107 | 2,261 | 8,755 | (3,967) | ||||||
| Mid-Stream [Member] | ||||||||||
| Revenues: | ||||||||||
| Oil and natural gas | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Contract drilling | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Gas gathering and processing | 82,882 | [1] | 69,057 | 232,938 | [2] | 198,632 | ||||
| Total revenues | 82,882 | [1] | 69,057 | 232,938 | [2] | 198,632 | ||||
| Operating costs: | ||||||||||
| Oil and natural gas | 0 | 0 | 0 | 0 | ||||||
| Contract drilling | 0 | 0 | 0 | 0 | ||||||
| Gas gathering and processing | 66,932 | 54,602 | 185,738 | 156,525 | ||||||
| Total operating costs | 66,932 | 54,602 | 185,738 | 156,525 | ||||||
| Depreciation, depletion, and amortization | 11,265 | 10,880 | 33,493 | 32,547 | ||||||
| Total expenses | 78,197 | 65,482 | 219,231 | 189,072 | ||||||
| General and administrative | 0 | 0 | 0 | 0 | ||||||
| (Gain) loss on disposition of assets | (16) | (14) | (95) | (58) | ||||||
| Income (loss) from operations | 4,701 | 3,589 | 13,802 | 9,618 | ||||||
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 | ||||||
| Interest, net | (381) | 0 | (834) | 0 | ||||||
| Other | 0 | 0 | 0 | 0 | ||||||
| Income (loss) before income taxes | 4,320 | 3,589 | 12,968 | 9,618 | ||||||
| Other Segments [Member] | ||||||||||
| Revenues: | ||||||||||
| Oil and natural gas | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Contract drilling | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Gas gathering and processing | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Total revenues | 0 | [1] | 0 | 0 | [2] | 0 | ||||
| Operating costs: | ||||||||||
| Oil and natural gas | 0 | 0 | 0 | 0 | ||||||
| Contract drilling | 0 | 0 | 0 | 0 | ||||||
| Gas gathering and processing | 3,808 | 0 | 7,384 | 0 | ||||||
| Total operating costs | 3,808 | 0 | 7,384 | 0 | ||||||
| Depreciation, depletion, and amortization | 1,923 | 1,913 | 5,759 | 5,558 | ||||||
| Total expenses | 5,731 | 1,913 | 13,143 | 5,558 | ||||||
| General and administrative | 9,278 | 9,235 | 28,752 | 26,902 | ||||||
| (Gain) loss on disposition of assets | 0 | 0 | (30) | (813) | ||||||
| Income (loss) from operations | (15,009) | (11,148) | (41,865) | (31,647) | ||||||
| Gain (loss) on derivatives | (4,385) | (2,614) | (25,608) | 21,019 | ||||||
| Interest, net | (7,564) | (9,944) | (24,844) | (28,807) | ||||||
| Other | 3,814 | 5 | 7,401 | 14 | ||||||
| Income (loss) before income taxes | (23,144) | (23,701) | (84,916) | (39,421) | ||||||
| Eliminations [Member] | ||||||||||
| Revenues: | ||||||||||
| Oil and natural gas | 0 | 0 | 0 | 0 | ||||||
| Contract drilling | (7,400) | (3,969) | (17,962) | (9,558) | ||||||
| Gas gathering and processing | (25,059) | (17,658) | (65,012) | (48,139) | ||||||
| Total revenues | (32,459) | (21,627) | (82,974) | (57,697) | ||||||
| Operating costs: | ||||||||||
| Oil and natural gas | (1,261) | (1,171) | (3,715) | (3,476) | ||||||
| Contract drilling | (6,214) | (3,368) | (15,528) | (8,581) | ||||||
| Gas gathering and processing | (27,606) | (16,486) | (68,681) | (44,663) | ||||||
| Total operating costs | (35,081) | (21,025) | (87,924) | (56,720) | ||||||
| Depreciation, depletion, and amortization | 0 | 0 | 0 | 0 | ||||||
| Total expenses | (35,081) | (21,025) | (87,924) | (56,720) | ||||||
| General and administrative | 0 | 0 | 0 | 0 | ||||||
| (Gain) loss on disposition of assets | 0 | 0 | 0 | 0 | ||||||
| Income (loss) from operations | 2,622 | (602) | 4,950 | (977) | ||||||
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 | ||||||
| Interest, net | 0 | 0 | 0 | 0 | ||||||
| Other | (3,808) | 0 | (7,384) | 0 | ||||||
| Income (loss) before income taxes | $ (1,186) | $ (602) | $ (2,434) | $ (977) | ||||||
| ||||||||||
| X | ||||||||||
- Definition Costs of generating revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period. No definition available.
|
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Cost incurred related to the gas activities, such as transportation, marketing and processing crude oil, natural gas and refined petroleum products. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Revenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Costs incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Aggregate revenue during the period related to oil and gas business activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
Supplemental Condensed Consolidated Financial Information (Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Jun. 30, 2018 |
Jan. 01, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Dec. 31, 2016 |
|||
|---|---|---|---|---|---|---|---|---|---|---|
| Current assets: | ||||||||||
| Cash and cash equivalents | $ 91,557 | $ 701 | $ 822 | $ 893 | ||||||
| Accounts receivable, net of allowance for doubtful accounts | 122,123 | 111,512 | ||||||||
| Materials and supplies | 505 | 505 | ||||||||
| Current derivative asset | 0 | 721 | ||||||||
| Prepaid expenses and other | 9,419 | 6,233 | ||||||||
| Total current assets | 223,604 | 119,672 | ||||||||
| Oil and natural gas properties on the full cost method: | ||||||||||
| Proved properties | 5,901,661 | 5,712,813 | ||||||||
| Unproved properties not being amortized | 332,886 | 296,764 | ||||||||
| Drilling equipment | 1,632,540 | 1,593,611 | ||||||||
| Gas gathering and processing equipment | 751,715 | 726,236 | ||||||||
| Saltwater disposal systems | 67,074 | 62,618 | ||||||||
| Corporate land and building | 59,081 | 59,080 | ||||||||
| Transportation equipment | 29,103 | 29,631 | ||||||||
| Other | 56,750 | 53,439 | ||||||||
| Property, plant, and equipment, gross | 8,830,810 | 8,534,192 | ||||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 6,325,160 | 6,151,450 | ||||||||
| Net property and equipment | 2,505,650 | 2,382,742 | ||||||||
| Intercompany receivable | 0 | 0 | ||||||||
| Goodwill | 62,808 | 62,808 | ||||||||
| Investments | 1,500 | 1,500 | ||||||||
| Other assets | 27,203 | 14,730 | ||||||||
| Total assets | 2,820,765 | [1] | 2,581,452 | |||||||
| Current liabilities: | ||||||||||
| Accounts payable | 143,552 | 112,648 | ||||||||
| Accrued liabilities | 67,743 | 48,523 | ||||||||
| Income taxes payable | 1,051 | 0 | ||||||||
| Current derivative liability | 13,067 | 7,763 | ||||||||
| Current portion of other long-term liabilities | 14,150 | $ 15,750 | 13,002 | |||||||
| Total current liabilities | 239,563 | 181,936 | ||||||||
| Intercompany debt | 0 | 0 | ||||||||
| Long-term debt | 178,000 | |||||||||
| Bonds payable less debt issuance costs | 643,921 | 642,276 | ||||||||
| Non-current derivative liability | 1,542 | 0 | ||||||||
| Other long-term liabilities | 101,410 | 109,940 | 100,203 | |||||||
| Deferred income taxes | 164,964 | 133,064 | 133,477 | |||||||
| Shareholders' equity: | ||||||||||
| Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued | 0 | 0 | ||||||||
| Common stock, $.20 par value, 175,000,000 shares authorized | 10,414 | 10,280 | ||||||||
| Capital in excess of par value | 626,746 | 535,815 | ||||||||
| Contributions from Unit | 0 | 0 | ||||||||
| Accumulated other comprehensive income (loss) | (103) | $ (65) | 63 | 63 | 53 | $ 20 | 0 | |||
| Retained earnings | 830,680 | $ 798,128 | 799,402 | |||||||
| Total shareholders’ equity attributable to Unit Corporation | 1,467,737 | 1,345,560 | ||||||||
| Non-controlling interests in consolidated subsidiaries | 201,628 | 0 | ||||||||
| Total shareholders' equity | 1,669,365 | 1,345,560 | 1,251,905 | 1,194,070 | ||||||
| Total liabilities and shareholders' equity | 2,820,765 | [1] | 2,581,452 | |||||||
| Consolidating Adjustments [Member] | ||||||||||
| Current assets: | ||||||||||
| Cash and cash equivalents | 0 | 0 | 0 | 0 | ||||||
| Accounts receivable, net of allowance for doubtful accounts | 0 | 0 | ||||||||
| Materials and supplies | 0 | 0 | ||||||||
| Current derivative asset | 0 | 0 | ||||||||
| Prepaid expenses and other | 0 | 0 | ||||||||
| Total current assets | 0 | 0 | ||||||||
| Oil and natural gas properties on the full cost method: | ||||||||||
| Proved properties | 0 | 0 | ||||||||
| Unproved properties not being amortized | 0 | 0 | ||||||||
| Drilling equipment | 0 | 0 | ||||||||
| Gas gathering and processing equipment | 0 | 0 | ||||||||
| Saltwater disposal systems | 0 | 0 | ||||||||
| Corporate land and building | 0 | 0 | ||||||||
| Transportation equipment | 0 | 0 | ||||||||
| Other | 0 | 0 | ||||||||
| Property, plant, and equipment, gross | 0 | 0 | ||||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 0 | 0 | ||||||||
| Net property and equipment | 0 | 0 | ||||||||
| Intercompany receivable | (907,907) | (1,155,725) | ||||||||
| Goodwill | 0 | 0 | ||||||||
| Investments | (1,248,309) | (1,044,709) | ||||||||
| Other assets | 0 | 0 | ||||||||
| Total assets | (2,156,216) | (2,200,434) | ||||||||
| Current liabilities: | ||||||||||
| Accounts payable | 0 | 0 | ||||||||
| Accrued liabilities | 0 | 0 | ||||||||
| Income taxes payable | 0 | |||||||||
| Current derivative liability | 0 | 0 | ||||||||
| Current portion of other long-term liabilities | 0 | 0 | ||||||||
| Total current liabilities | 0 | 0 | ||||||||
| Intercompany debt | (907,382) | (1,155,725) | ||||||||
| Long-term debt | 0 | |||||||||
| Bonds payable less debt issuance costs | 0 | 0 | ||||||||
| Non-current derivative liability | 0 | |||||||||
| Other long-term liabilities | 0 | 0 | ||||||||
| Deferred income taxes | 0 | 0 | ||||||||
| Shareholders' equity: | ||||||||||
| Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued | 0 | 0 | ||||||||
| Common stock, $.20 par value, 175,000,000 shares authorized | 0 | 0 | ||||||||
| Capital in excess of par value | (242,963) | (61,470) | ||||||||
| Contributions from Unit | (525) | 0 | ||||||||
| Accumulated other comprehensive income (loss) | 0 | 0 | ||||||||
| Retained earnings | (1,005,346) | (983,239) | ||||||||
| Total shareholders’ equity attributable to Unit Corporation | (1,248,834) | (1,044,709) | ||||||||
| Non-controlling interests in consolidated subsidiaries | 0 | 0 | ||||||||
| Total shareholders' equity | (1,248,834) | (1,044,709) | ||||||||
| Total liabilities and shareholders' equity | (2,156,216) | (2,200,434) | ||||||||
| Parent [Member] | ||||||||||
| Current assets: | ||||||||||
| Cash and cash equivalents | 82,267 | 510 | 504 | 517 | ||||||
| Accounts receivable, net of allowance for doubtful accounts | 1,374 | 154 | ||||||||
| Materials and supplies | 0 | 0 | ||||||||
| Current derivative asset | 0 | 721 | ||||||||
| Prepaid expenses and other | 3,125 | 2,986 | ||||||||
| Total current assets | 86,766 | 4,371 | ||||||||
| Oil and natural gas properties on the full cost method: | ||||||||||
| Proved properties | 0 | 0 | ||||||||
| Unproved properties not being amortized | 0 | 0 | ||||||||
| Drilling equipment | 0 | 0 | ||||||||
| Gas gathering and processing equipment | 0 | 0 | ||||||||
| Saltwater disposal systems | 0 | 0 | ||||||||
| Corporate land and building | 0 | 0 | ||||||||
| Transportation equipment | 9,273 | 9,270 | ||||||||
| Other | 28,506 | 28,039 | ||||||||
| Property, plant, and equipment, gross | 37,779 | 37,309 | ||||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 25,922 | 21,268 | ||||||||
| Net property and equipment | 11,857 | 16,041 | ||||||||
| Intercompany receivable | 907,907 | 1,155,725 | ||||||||
| Goodwill | 0 | 0 | ||||||||
| Investments | 1,248,309 | 1,044,709 | ||||||||
| Other assets | 5,605 | 5,373 | ||||||||
| Total assets | 2,260,444 | 2,226,219 | ||||||||
| Current liabilities: | ||||||||||
| Accounts payable | 28,116 | 13,124 | ||||||||
| Accrued liabilities | 36,444 | 26,165 | ||||||||
| Income taxes payable | 1,051 | |||||||||
| Current derivative liability | 13,067 | 7,763 | ||||||||
| Current portion of other long-term liabilities | 966 | 657 | ||||||||
| Total current liabilities | 79,644 | 47,709 | ||||||||
| Intercompany debt | 0 | 0 | ||||||||
| Long-term debt | 178,000 | |||||||||
| Bonds payable less debt issuance costs | 643,921 | 642,276 | ||||||||
| Non-current derivative liability | 1,542 | |||||||||
| Other long-term liabilities | 12,790 | 11,257 | ||||||||
| Deferred income taxes | 54,707 | 1,480 | ||||||||
| Shareholders' equity: | ||||||||||
| Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued | 0 | 0 | ||||||||
| Common stock, $.20 par value, 175,000,000 shares authorized | 10,414 | 10,280 | ||||||||
| Capital in excess of par value | 626,746 | 535,815 | ||||||||
| Contributions from Unit | 0 | 0 | ||||||||
| Accumulated other comprehensive income (loss) | 0 | 0 | ||||||||
| Retained earnings | 830,680 | 799,402 | ||||||||
| Total shareholders’ equity attributable to Unit Corporation | 1,467,840 | 1,345,497 | ||||||||
| Non-controlling interests in consolidated subsidiaries | 0 | 0 | ||||||||
| Total shareholders' equity | 1,467,840 | 1,345,497 | ||||||||
| Total liabilities and shareholders' equity | 2,260,444 | 2,226,219 | ||||||||
| Combined Guarantor Subsidiaries [Member] | ||||||||||
| Current assets: | ||||||||||
| Cash and cash equivalents | 251 | 191 | 318 | 376 | ||||||
| Accounts receivable, net of allowance for doubtful accounts | 92,078 | 83,442 | ||||||||
| Materials and supplies | 505 | 505 | ||||||||
| Current derivative asset | 0 | 0 | ||||||||
| Prepaid expenses and other | 3,538 | 2,370 | ||||||||
| Total current assets | 96,372 | 86,508 | ||||||||
| Oil and natural gas properties on the full cost method: | ||||||||||
| Proved properties | 5,901,661 | 5,712,813 | ||||||||
| Unproved properties not being amortized | 332,886 | 296,764 | ||||||||
| Drilling equipment | 1,632,540 | 1,593,611 | ||||||||
| Gas gathering and processing equipment | 0 | 0 | ||||||||
| Saltwater disposal systems | 67,074 | 62,618 | ||||||||
| Corporate land and building | 59,081 | 59,080 | ||||||||
| Transportation equipment | 16,766 | 17,423 | ||||||||
| Other | 28,244 | 25,400 | ||||||||
| Property, plant, and equipment, gross | 8,038,252 | 7,767,709 | ||||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 5,945,762 | 5,807,757 | ||||||||
| Net property and equipment | 2,092,490 | 1,959,952 | ||||||||
| Intercompany receivable | 0 | 0 | ||||||||
| Goodwill | 62,808 | 62,808 | ||||||||
| Investments | 1,500 | 1,500 | ||||||||
| Other assets | 6,186 | 6,328 | ||||||||
| Total assets | 2,259,356 | 2,117,096 | ||||||||
| Current liabilities: | ||||||||||
| Accounts payable | 90,543 | 81,334 | ||||||||
| Accrued liabilities | 26,583 | 19,134 | ||||||||
| Income taxes payable | 0 | |||||||||
| Current derivative liability | 0 | 0 | ||||||||
| Current portion of other long-term liabilities | 6,348 | 8,501 | ||||||||
| Total current liabilities | 123,474 | 108,969 | ||||||||
| Intercompany debt | 906,296 | 870,582 | ||||||||
| Long-term debt | 0 | |||||||||
| Bonds payable less debt issuance costs | 0 | 0 | ||||||||
| Non-current derivative liability | 0 | |||||||||
| Other long-term liabilities | 72,494 | 77,566 | ||||||||
| Deferred income taxes | 110,257 | 85,443 | ||||||||
| Shareholders' equity: | ||||||||||
| Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued | 0 | 0 | ||||||||
| Common stock, $.20 par value, 175,000,000 shares authorized | 0 | 0 | ||||||||
| Capital in excess of par value | 45,921 | 45,921 | ||||||||
| Contributions from Unit | 0 | 0 | ||||||||
| Accumulated other comprehensive income (loss) | (103) | 63 | ||||||||
| Retained earnings | 1,001,017 | 928,552 | ||||||||
| Total shareholders’ equity attributable to Unit Corporation | 1,046,835 | 974,536 | ||||||||
| Non-controlling interests in consolidated subsidiaries | 0 | 0 | ||||||||
| Total shareholders' equity | 1,046,835 | 974,536 | ||||||||
| Total liabilities and shareholders' equity | 2,259,356 | 2,117,096 | ||||||||
| Combined Non-Guarantor Subsidiaries [Member] | ||||||||||
| Current assets: | ||||||||||
| Cash and cash equivalents | 9,039 | 0 | $ 0 | $ 0 | ||||||
| Accounts receivable, net of allowance for doubtful accounts | 28,671 | 27,916 | ||||||||
| Materials and supplies | 0 | 0 | ||||||||
| Current derivative asset | 0 | 0 | ||||||||
| Prepaid expenses and other | 2,756 | 877 | ||||||||
| Total current assets | 40,466 | 28,793 | ||||||||
| Oil and natural gas properties on the full cost method: | ||||||||||
| Proved properties | 0 | 0 | ||||||||
| Unproved properties not being amortized | 0 | 0 | ||||||||
| Drilling equipment | 0 | 0 | ||||||||
| Gas gathering and processing equipment | 751,715 | 726,236 | ||||||||
| Saltwater disposal systems | 0 | 0 | ||||||||
| Corporate land and building | 0 | 0 | ||||||||
| Transportation equipment | 3,064 | 2,938 | ||||||||
| Other | 0 | 0 | ||||||||
| Property, plant, and equipment, gross | 754,779 | 729,174 | ||||||||
| Less accumulated depreciation, depletion, amortization, and impairment | 353,476 | 322,425 | ||||||||
| Net property and equipment | 401,303 | 406,749 | ||||||||
| Intercompany receivable | 0 | 0 | ||||||||
| Goodwill | 0 | 0 | ||||||||
| Investments | 0 | 0 | ||||||||
| Other assets | 15,412 | 3,029 | ||||||||
| Total assets | 457,181 | 438,571 | ||||||||
| Current liabilities: | ||||||||||
| Accounts payable | 24,893 | 18,190 | ||||||||
| Accrued liabilities | 4,716 | 3,224 | ||||||||
| Income taxes payable | 0 | |||||||||
| Current derivative liability | 0 | 0 | ||||||||
| Current portion of other long-term liabilities | 6,836 | 3,844 | ||||||||
| Total current liabilities | 36,445 | 25,258 | ||||||||
| Intercompany debt | 1,086 | 285,143 | ||||||||
| Long-term debt | 0 | |||||||||
| Bonds payable less debt issuance costs | 0 | 0 | ||||||||
| Non-current derivative liability | 0 | |||||||||
| Other long-term liabilities | 16,126 | 11,380 | ||||||||
| Deferred income taxes | 0 | 46,554 | ||||||||
| Shareholders' equity: | ||||||||||
| Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued | 0 | 0 | ||||||||
| Common stock, $.20 par value, 175,000,000 shares authorized | 0 | 0 | ||||||||
| Capital in excess of par value | 197,042 | 15,549 | ||||||||
| Contributions from Unit | 525 | 0 | ||||||||
| Accumulated other comprehensive income (loss) | 0 | 0 | ||||||||
| Retained earnings | 4,329 | 54,687 | ||||||||
| Total shareholders’ equity attributable to Unit Corporation | 201,896 | 70,236 | ||||||||
| Non-controlling interests in consolidated subsidiaries | 201,628 | 0 | ||||||||
| Total shareholders' equity | 403,524 | 70,236 | ||||||||
| Total liabilities and shareholders' equity | $ 457,181 | $ 438,571 | ||||||||
| ||||||||||
| X | ||||||||||
- Definition Contributions from parent to joint venture No definition available.
|
| X | ||||||||||
- Definition Intercompany debt No definition available.
|
| X | ||||||||||
- Definition Intercompany receivable No definition available.
|
| X | ||||||||||
- Definition Natural gas gathering systems and treating plants. No definition available.
|
| X | ||||||||||
- Definition Saltwater disposal systems No definition available.
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Capitalized costs incurred for support equipment and facilities used in oil and gas producing activities (such as seismic equipment, drilling equipment, construction and grading equipment, vehicles, repair shops, warehouses, supply points, camps, and division, district, or field offices). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of investments, and noncurrent assets classified as other. No definition available.
|
| X | ||||||||||
- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of collateralized/uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Subordinated debt places a lender in a lien position behind the primary lender of the company. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Supplemental Condensed Consolidated Financial Information Supplemental Condensed Consolidated Financial Information (Condensed Consolidating Balance Sheets) (Parenthetical) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Condensed Financial Statements, Captions [Line Items] | ||
| Accounts receivable, allowance for doubtful accounts | $ 2,450 | $ 2,450 |
| Common stock, shares issued | 54,063,705 | 52,880,134 |
| Consolidating Adjustments [Member] | ||
| Condensed Financial Statements, Captions [Line Items] | ||
| Accounts receivable, allowance for doubtful accounts | $ 0 | $ 0 |
| Common stock, shares issued | 0 | 0 |
| Parent [Member] | ||
| Condensed Financial Statements, Captions [Line Items] | ||
| Accounts receivable, allowance for doubtful accounts | $ 0 | $ 0 |
| Common stock, shares issued | 54,063,705 | 52,880,134 |
| Combined Guarantor Subsidiaries [Member] | ||
| Condensed Financial Statements, Captions [Line Items] | ||
| Accounts receivable, allowance for doubtful accounts | $ 1,245 | $ 1,245 |
| Common stock, shares issued | 0 | 0 |
| Combined Non-Guarantor Subsidiaries [Member] | ||
| Condensed Financial Statements, Captions [Line Items] | ||
| Accounts receivable, allowance for doubtful accounts | $ 1,205 | $ 1,205 |
| Common stock, shares issued | 0 | 0 |
| X | ||||||||||
- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
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- Details
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| X | ||||||||||
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Supplemental Condensed Consolidated Financial Information (Condensed Consolidating Statements of Income) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Condensed Financial Statements, Captions [Line Items] | ||||
| Revenues | $ 220,058 | $ 188,488 | $ 628,493 | $ 534,793 |
| Expenses: | ||||
| Operating costs | 107,305 | 106,774 | 320,553 | 298,948 |
| Depreciation, depletion, and amortization | 63,537 | 54,533 | 178,976 | 151,545 |
| General and administrative | 9,278 | 9,235 | 28,752 | 26,902 |
| Gain on disposition of assets | (253) | (81) | (575) | (1,153) |
| Total operating costs | 179,867 | 170,461 | 527,706 | 476,242 |
| Income (loss) from operations | 40,191 | 18,027 | 100,787 | 58,551 |
| Interest, net | (7,945) | (9,944) | (25,678) | (28,807) |
| Gain (loss) on derivatives | (4,385) | (2,614) | (25,608) | 21,019 |
| Other, net | 6 | 5 | 17 | 14 |
| Income (loss) before income taxes | 27,867 | 5,474 | 49,518 | 50,777 |
| Income tax expense (benefit) | 6,744 | 1,769 | 12,380 | 22,084 |
| Equity in net earnings from investment in subsidiaries, net of taxes | 0 | 0 | 0 | 0 |
| Net income | 21,123 | 3,705 | 37,138 | 28,693 |
| Less: net income attributable to non-controlling interest | 2,224 | 0 | 4,586 | 0 |
| Net income attributable to Unit Corporation | 18,899 | 3,705 | 32,552 | 28,693 |
| Consolidating Adjustments [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Revenues | (32,459) | (21,627) | (82,974) | (57,697) |
| Expenses: | ||||
| Operating costs | (31,273) | (21,026) | (80,540) | (56,720) |
| Depreciation, depletion, and amortization | 0 | 0 | 0 | 0 |
| General and administrative | 0 | 0 | 0 | 0 |
| Gain on disposition of assets | 0 | 0 | 0 | 0 |
| Total operating costs | (31,273) | (21,026) | (80,540) | (56,720) |
| Income (loss) from operations | (1,186) | (601) | (2,434) | (977) |
| Interest, net | 0 | 0 | 0 | 0 |
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 |
| Other, net | 0 | 0 | 0 | 0 |
| Income (loss) before income taxes | (1,186) | (601) | (2,434) | (977) |
| Income tax expense (benefit) | 0 | 0 | 0 | 0 |
| Equity in net earnings from investment in subsidiaries, net of taxes | (29,077) | (12,377) | (74,360) | (35,786) |
| Net income | (30,263) | (12,978) | (76,794) | (36,763) |
| Less: net income attributable to non-controlling interest | 0 | 0 | 0 | 0 |
| Net income attributable to Unit Corporation | (30,263) | (12,978) | (76,794) | (36,763) |
| Parent [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Revenues | 0 | 0 | 0 | 0 |
| Expenses: | ||||
| Operating costs | 0 | 0 | 0 | 0 |
| Depreciation, depletion, and amortization | 1,923 | 1,913 | 5,759 | 5,558 |
| General and administrative | 0 | 0 | 0 | 0 |
| Gain on disposition of assets | 0 | 0 | (30) | (813) |
| Total operating costs | 1,923 | 1,913 | 5,729 | 4,745 |
| Income (loss) from operations | (1,923) | (1,913) | (5,729) | (4,745) |
| Interest, net | (7,564) | (9,776) | (24,844) | (28,276) |
| Gain (loss) on derivatives | (4,385) | (2,614) | (25,608) | 21,019 |
| Other, net | 6 | 5 | 17 | 14 |
| Income (loss) before income taxes | (13,866) | (14,298) | (56,164) | (11,988) |
| Income tax expense (benefit) | (3,688) | (5,626) | (14,356) | (4,895) |
| Equity in net earnings from investment in subsidiaries, net of taxes | 29,077 | 12,377 | 74,360 | 35,786 |
| Net income | 18,899 | 3,705 | 32,552 | 28,693 |
| Less: net income attributable to non-controlling interest | 0 | 0 | 0 | 0 |
| Net income attributable to Unit Corporation | 18,899 | 3,705 | 32,552 | 28,693 |
| Combined Guarantor Subsidiaries [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Revenues | 169,635 | 141,058 | 478,529 | 393,858 |
| Expenses: | ||||
| Operating costs | 71,646 | 73,197 | 215,355 | 199,143 |
| Depreciation, depletion, and amortization | 50,349 | 41,740 | 139,724 | 113,440 |
| General and administrative | 9,252 | 7,083 | 26,136 | 20,880 |
| Gain on disposition of assets | (237) | (67) | (450) | (282) |
| Total operating costs | 131,010 | 121,953 | 380,765 | 333,181 |
| Income (loss) from operations | 38,625 | 19,105 | 97,764 | 60,677 |
| Interest, net | 0 | 0 | 0 | 0 |
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 |
| Other, net | (1) | 0 | 0 | 0 |
| Income (loss) before income taxes | 38,624 | 19,105 | 97,764 | 60,677 |
| Income tax expense (benefit) | 9,839 | 7,003 | 25,299 | 25,357 |
| Equity in net earnings from investment in subsidiaries, net of taxes | 0 | 0 | 0 | 0 |
| Net income | 28,785 | 12,102 | 72,465 | 35,320 |
| Less: net income attributable to non-controlling interest | 0 | 0 | 0 | 0 |
| Net income attributable to Unit Corporation | 28,785 | 12,102 | 72,465 | 35,320 |
| Combined Non-Guarantor Subsidiaries [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Revenues | 82,882 | 69,057 | 232,938 | 198,632 |
| Expenses: | ||||
| Operating costs | 66,932 | 54,603 | 185,738 | 156,525 |
| Depreciation, depletion, and amortization | 11,265 | 10,880 | 33,493 | 32,547 |
| General and administrative | 26 | 2,152 | 2,616 | 6,022 |
| Gain on disposition of assets | (16) | (14) | (95) | (58) |
| Total operating costs | 78,207 | 67,621 | 221,752 | 195,036 |
| Income (loss) from operations | 4,675 | 1,436 | 11,186 | 3,596 |
| Interest, net | (381) | (168) | (834) | (531) |
| Gain (loss) on derivatives | 0 | 0 | 0 | 0 |
| Other, net | 1 | 0 | 0 | 0 |
| Income (loss) before income taxes | 4,295 | 1,268 | 10,352 | 3,065 |
| Income tax expense (benefit) | 593 | 392 | 1,437 | 1,622 |
| Equity in net earnings from investment in subsidiaries, net of taxes | 0 | 0 | 0 | 0 |
| Net income | 3,702 | 876 | 8,915 | 1,443 |
| Less: net income attributable to non-controlling interest | 2,224 | 0 | 4,586 | 0 |
| Net income attributable to Unit Corporation | $ 1,478 | $ 876 | $ 4,329 | $ 1,443 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Total costs of sales and operating expenses for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of income (loss) of subsidiary attributable to the parent entity. No definition available.
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Supplemental Condensed Consolidated Financial Information (Condensed Consolidating Statements of Comprehensive Income) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Condensed Financial Statements, Captions [Line Items] | ||||
| Net income | $ 21,123 | $ 3,705 | $ 37,138 | $ 28,693 |
| Unrealized gain (loss) on securities, net of tax of ($13), $20, ($60) and $32 | (38) | 33 | (179) | 53 |
| Comprehensive income | 21,085 | 3,738 | 36,959 | 28,746 |
| Less: Comprehensive income attributable to non-controlling interest | 2,224 | 0 | 4,586 | 0 |
| Comprehensive income attributable to Unit Corporation | 18,861 | 3,738 | 32,373 | 28,746 |
| Consolidating Adjustments [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Net income | (30,263) | (12,978) | (76,794) | (36,763) |
| Unrealized gain (loss) on securities, net of tax of ($13), $20, ($60) and $32 | 0 | 0 | 0 | 0 |
| Comprehensive income | (30,263) | (12,978) | (76,794) | (36,763) |
| Less: Comprehensive income attributable to non-controlling interest | 0 | 0 | 0 | 0 |
| Comprehensive income attributable to Unit Corporation | (30,263) | (12,978) | (76,794) | (36,763) |
| Parent [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Net income | 18,899 | 3,705 | 32,552 | 28,693 |
| Unrealized gain (loss) on securities, net of tax of ($13), $20, ($60) and $32 | 0 | 0 | 0 | 0 |
| Comprehensive income | 18,899 | 3,705 | 32,552 | 28,693 |
| Less: Comprehensive income attributable to non-controlling interest | 0 | 0 | 0 | 0 |
| Comprehensive income attributable to Unit Corporation | 18,899 | 3,705 | 32,552 | 28,693 |
| Combined Guarantor Subsidiaries [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Net income | 28,785 | 12,102 | 72,465 | 35,320 |
| Unrealized gain (loss) on securities, net of tax of ($13), $20, ($60) and $32 | (38) | 33 | (179) | 53 |
| Comprehensive income | 28,747 | 12,135 | 72,286 | 35,373 |
| Less: Comprehensive income attributable to non-controlling interest | 0 | 0 | 0 | 0 |
| Comprehensive income attributable to Unit Corporation | 28,747 | 12,135 | 72,286 | 35,373 |
| Combined Non-Guarantor Subsidiaries [Member] | ||||
| Condensed Financial Statements, Captions [Line Items] | ||||
| Net income | 3,702 | 876 | 8,915 | 1,443 |
| Unrealized gain (loss) on securities, net of tax of ($13), $20, ($60) and $32 | 0 | 0 | 0 | 0 |
| Comprehensive income | 3,702 | 876 | 8,915 | 1,443 |
| Less: Comprehensive income attributable to non-controlling interest | 2,224 | 0 | 4,586 | 0 |
| Comprehensive income attributable to Unit Corporation | $ 1,478 | $ 876 | $ 4,329 | $ 1,443 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount after tax of other comprehensive income (loss) attributable to noncontrolling interests. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
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- Details
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| X | ||||||||||
- Details
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- Details
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| X | ||||||||||
- Details
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Supplemental Condensed Consolidated Financial Information (Condensed Consolidating Statements of Cash Flows (Unaudited)) (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| OPERATING ACTIVITIES: | ||
| Net cash provided by (used in) operating activities | $ 236,535 | $ 184,792 |
| INVESTING ACTIVITIES: | ||
| Capital expenditures | (304,054) | (167,392) |
| Producing properties and other acquisitions | (769) | (55,429) |
| Proceeds from disposition of assets | 25,316 | 20,137 |
| Other | 0 | (1,500) |
| Net cash provided by (used in) investing activities | (279,507) | (204,184) |
| FINANCING ACTIVITIES: | ||
| Borrowings under credit agreement | 71,200 | 251,401 |
| Payments under credit agreement | (249,200) | (250,100) |
| Intercompany borrowings (advances), net | 0 | 0 |
| Payments on capitalized leases | (2,869) | (2,967) |
| Proceeds from investments of non-controlling interests | 300,000 | 0 |
| Contributions from Unit | 0 | 0 |
| Transaction costs associated with non-controlling interests | (2,303) | 0 |
| Proceeds from issuance of common stock, net of issuance costs | 0 | 18,623 |
| Book overdrafts | 17,000 | 2,364 |
| Net cash provided by (used in) financing activities | 133,828 | 19,321 |
| Net increase (decrease) in cash and cash equivalents | 90,856 | (71) |
| Cash and cash equivalents, beginning of period | 701 | 893 |
| Cash and cash equivalents, end of period | 91,557 | 822 |
| Consolidating Adjustments [Member] | ||
| OPERATING ACTIVITIES: | ||
| Net cash provided by (used in) operating activities | 128,605 | 0 |
| INVESTING ACTIVITIES: | ||
| Capital expenditures | 0 | 0 |
| Producing properties and other acquisitions | 0 | 0 |
| Proceeds from disposition of assets | 0 | 0 |
| Other | 0 | 0 |
| Net cash provided by (used in) investing activities | 0 | 0 |
| FINANCING ACTIVITIES: | ||
| Borrowings under credit agreement | 0 | 0 |
| Payments under credit agreement | 0 | 0 |
| Intercompany borrowings (advances), net | (128,080) | 0 |
| Payments on capitalized leases | 0 | 0 |
| Proceeds from investments of non-controlling interests | 0 | 0 |
| Contributions from Unit | (525) | 0 |
| Transaction costs associated with non-controlling interests | 0 | 0 |
| Proceeds from issuance of common stock, net of issuance costs | 0 | 0 |
| Book overdrafts | 0 | 0 |
| Net cash provided by (used in) financing activities | (128,605) | 0 |
| Net increase (decrease) in cash and cash equivalents | 0 | 0 |
| Cash and cash equivalents, beginning of period | 0 | 0 |
| Cash and cash equivalents, end of period | 0 | 0 |
| Parent [Member] | ||
| OPERATING ACTIVITIES: | ||
| Net cash provided by (used in) operating activities | (103,436) | 822 |
| INVESTING ACTIVITIES: | ||
| Capital expenditures | 22 | (3,595) |
| Producing properties and other acquisitions | 0 | 0 |
| Proceeds from disposition of assets | 30 | 955 |
| Other | 0 | 0 |
| Net cash provided by (used in) investing activities | 52 | (2,640) |
| FINANCING ACTIVITIES: | ||
| Borrowings under credit agreement | 69,200 | 251,401 |
| Payments under credit agreement | (247,200) | (250,100) |
| Intercompany borrowings (advances), net | 248,343 | (20,483) |
| Payments on capitalized leases | 0 | 0 |
| Proceeds from investments of non-controlling interests | 102,958 | 0 |
| Contributions from Unit | 0 | 0 |
| Transaction costs associated with non-controlling interests | (2,303) | 0 |
| Proceeds from issuance of common stock, net of issuance costs | 0 | 18,623 |
| Book overdrafts | 14,143 | 2,364 |
| Net cash provided by (used in) financing activities | 185,141 | 1,805 |
| Net increase (decrease) in cash and cash equivalents | 81,757 | (13) |
| Cash and cash equivalents, beginning of period | 510 | 517 |
| Cash and cash equivalents, end of period | 82,267 | 504 |
| Combined Guarantor Subsidiaries [Member] | ||
| OPERATING ACTIVITIES: | ||
| Net cash provided by (used in) operating activities | 215,350 | 149,963 |
| INVESTING ACTIVITIES: | ||
| Capital expenditures | (275,434) | (152,055) |
| Producing properties and other acquisitions | (769) | (55,429) |
| Proceeds from disposition of assets | 25,199 | 19,124 |
| Other | 0 | (1,500) |
| Net cash provided by (used in) investing activities | (251,004) | (189,860) |
| FINANCING ACTIVITIES: | ||
| Borrowings under credit agreement | 0 | 0 |
| Payments under credit agreement | 0 | 0 |
| Intercompany borrowings (advances), net | 35,714 | 39,839 |
| Payments on capitalized leases | 0 | 0 |
| Proceeds from investments of non-controlling interests | 0 | 0 |
| Contributions from Unit | 0 | 0 |
| Transaction costs associated with non-controlling interests | 0 | 0 |
| Proceeds from issuance of common stock, net of issuance costs | 0 | 0 |
| Book overdrafts | 0 | 0 |
| Net cash provided by (used in) financing activities | 35,714 | 39,839 |
| Net increase (decrease) in cash and cash equivalents | 60 | (58) |
| Cash and cash equivalents, beginning of period | 191 | 376 |
| Cash and cash equivalents, end of period | 251 | 318 |
| Combined Non-Guarantor Subsidiaries [Member] | ||
| OPERATING ACTIVITIES: | ||
| Net cash provided by (used in) operating activities | (3,984) | 34,007 |
| INVESTING ACTIVITIES: | ||
| Capital expenditures | (28,642) | (11,742) |
| Producing properties and other acquisitions | 0 | 0 |
| Proceeds from disposition of assets | 87 | 58 |
| Other | 0 | 0 |
| Net cash provided by (used in) investing activities | (28,555) | (11,684) |
| FINANCING ACTIVITIES: | ||
| Borrowings under credit agreement | 2,000 | 0 |
| Payments under credit agreement | (2,000) | 0 |
| Intercompany borrowings (advances), net | (155,977) | (19,356) |
| Payments on capitalized leases | (2,869) | (2,967) |
| Proceeds from investments of non-controlling interests | 197,042 | 0 |
| Contributions from Unit | 525 | 0 |
| Transaction costs associated with non-controlling interests | 0 | 0 |
| Proceeds from issuance of common stock, net of issuance costs | 0 | 0 |
| Book overdrafts | 2,857 | 0 |
| Net cash provided by (used in) financing activities | 41,578 | (22,323) |
| Net increase (decrease) in cash and cash equivalents | 9,039 | 0 |
| Cash and cash equivalents, beginning of period | 0 | 0 |
| Cash and cash equivalents, end of period | $ 9,039 | $ 0 |
| X | ||||||||||
- Definition Intercompany borrowings (advances) No definition available.
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash (inflow) outflow from investing activities classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cash inflow from parent as a source of financing that is recorded as additional paid in capital. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net cash inflow or outflow from the excess drawing from an existing cash balance, which will be honored by the bank but reflected as a loan to the drawer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Subsequent Event (Narrative) (Details) - Unit Credit Agreement [Member] - USD ($) $ in Millions |
9 Months Ended | |||
|---|---|---|---|---|
Oct. 18, 2018 |
Sep. 30, 2018 |
Apr. 02, 2018 |
Mar. 31, 2018 |
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| Subsequent Event [Line Items] | ||||
| Credit facility maturity date | April 10, 2020 | |||
| Line Of Credit Facility Lender Determined Amount [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Credit facility current credit amount | $ 425.0 | $ 475.0 | ||
| Line Of Credit Facility Commitment Amount [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Credit facility current credit amount | $ 425.0 | $ 475.0 | ||
| Fifth Amendment to Credit Agreement [Member] | Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Fifth Amendment changes | The Fifth Amendment, among other things, (i) extends the term of the Unit credit agreement to October 18, 2023, subject to certain conditions; (ii) reduces the pricing for borrowing and non-use fees; and (iii) eliminates the requirement that the company maintain a senior indebtedness to consolidated EBITDA ratio. | |||
| Credit facility maturity date | October 18, 2023 | |||
| Fifth Amendment to Credit Agreement [Member] | Line Of Credit Facility Lender Determined Amount [Member] | Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Credit facility current credit amount | $ 425.0 | |||
| Fifth Amendment to Credit Agreement [Member] | Line Of Credit Facility Commitment Amount [Member] | Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Credit facility current credit amount | $ 425.0 |
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
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