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Document And Entity Information (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2011
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Feb. 10, 2012
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Jun. 30, 2011
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| Document And Entity Information [Abstract] | |||
| Document Type | 10-K | ||
| Amendment Flag | false | ||
| Document Period End Date | Dec. 31, 2011 | ||
| Document Fiscal Year Focus | 2011 | ||
| Document Fiscal Period Focus | FY | ||
| 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 | 48,247,040 | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| Entity Public Float | $ 1,759,458,732 | ||
| Entity Current Reporting Status | Yes | ||
| Entity Voluntary Filers | No |
| X | ||||||||||
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- Definition
If the value is true, then the document as an amendment to previously-filed/accepted document. No definition available.
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| X | ||||||||||
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- Definition
End date of current fiscal year in the format --MM-DD. No definition available.
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| X | ||||||||||
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- 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 | ||||||||||
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- 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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| X | ||||||||||
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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 | ||||||||||
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- Definition
The type of document being provided (such as 10-K, 10-Q, N-1A, etc). The document type is limited to the same value as the supporting SEC submission type, minus any "/A" suffix. The acceptable values are as follows: S-1, S-3, S-4, S-11, F-1, F-3, F-4, F-9, F-10, 6-K, 8-K, 10, 10-K, 10-Q, 20-F, 40-F, N-1A, 485BPOS, 497, NCSR, N-CSR, N-CSRS, N-Q, 10-KT, 10-QT, 20-FT, and 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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| X | ||||||||||
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- Definition
Indicate number of shares outstanding of each of registrant's classes of common stock, as of latest practicable date. Where multiple classes exist define each class by adding class of stock items such as Common Class A [Member], Common Class B [Member] onto the Instrument [Domain] of the Entity Listings, Instrument No definition available.
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| X | ||||||||||
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- Definition
Indicate "Yes" or "No" whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. 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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| X | ||||||||||
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- Definition
Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, or (4) Smaller Reporting Company. 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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| X | ||||||||||
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- Definition
State aggregate market value of voting and non-voting common equity held by non-affiliates computed by reference to price at which the common equity was last sold, or average bid and asked price of such common equity, as of the last business day of registrant's most recently completed second fiscal quarter. The public float should be reported on the cover page of the registrants form 10K. No definition available.
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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
Indicate "Yes" or "No" if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. No definition available.
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| X | ||||||||||
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- Definition
Indicate "Yes" or "No" if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A. No definition available.
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| X | ||||||||||
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- Definition
Trading symbol of an instrument as listed on an exchange. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Drilling equipment No definition available.
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| X | ||||||||||
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- Definition
Natural gas gathering systems and treating plants. No definition available.
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| X | ||||||||||
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- Definition
Oil and natural gas properties-full cost method, not subject to amortization. No definition available.
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| X | ||||||||||
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- Definition
Oil and natural gas properties-full cost method, subject to amortization. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- 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 | ||||||||||
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- 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 | ||||||||||
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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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| X | ||||||||||
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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 | ||||||||||
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- Definition
The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- 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 | ||||||||||
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- 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 | ||||||||||
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- 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 | ||||||||||
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- 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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- Details
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| X | ||||||||||
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- Definition
Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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 | ||||||||||
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- 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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| X | ||||||||||
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- Definition
The current portion of prepayments received from customers for goods or services to be provided in the future. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts of deferred costs that are expected to be recognized as a charge against earnings in periods after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. An unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward is presented as a reduction of the related deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments which are expected to exist longer than one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregated 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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| X | ||||||||||
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- Definition
Total of all Liabilities and Stockholders' Equity items (or Partners' Capital, as applicable), including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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- Details
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| X | ||||||||||
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- Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate carrying amount, 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 and of liabilities not separately disclosed in the balance sheet. 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 | ||||||||||
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- Definition
Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- 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 | ||||||||||
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- Definition
The total of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer, and the aggregate carrying amount of current assets, as of the balance sheet date, not separately presented elsewhere in the balance sheet. Current assets 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 | ||||||||||
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- Definition
Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
This element represents capitalized assets classified as property, plant and equipment not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- 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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- 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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- Details
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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | |
|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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|
| Consolidated Balance Sheets [Abstract] | ||
| Accounts receivable, allowance for doubtful accounts | $ 5,343 | $ 5,083 |
| Preferred stock, par value | $ 1 | $ 1 |
| Preferred stock, shares authorized | 5,000,000 | 5,000,000 |
| Preferred stock, issued | 0 | 0 |
| Common stock, par value | $ 0.2 | $ 0.2 |
| Common stock, shares authorized | 175,000,000 | 175,000,000 |
| Common stock, shares issued | 48,151,442 | 47,910,431 |
| Other comprehensive income (loss), Tax | $ 11,961 | $ (4,243) |
| X | ||||||||||
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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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| X | ||||||||||
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- Definition
Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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 | ||||||||||
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- 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 | ||||||||||
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- Definition
Tax effect of the change in accumulated other comprehensive income (loss), that is, the tax effect on items included in other comprehensive income (loss) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- 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 | ||||||||||
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- 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 | ||||||||||
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- Details
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Consolidated Statements Of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Revenues: | ||||||
| Contract drilling | $ 484,651 | $ 316,384 | $ 236,315 | |||
| Oil and natural gas | 516,316 | 400,807 | 357,879 | |||
| Gas gathering and processing | 208,238 | 154,516 | 108,628 | |||
| Other | (834) | 10,138 | 7,076 | |||
| Total revenues | 1,208,371 | 881,845 | 709,898 | |||
| Contract drilling: | ||||||
| Operating costs | 269,899 | 186,813 | 140,080 | |||
| Depreciation | 79,667 | 69,970 | 45,326 | |||
| Oil and natural gas: | ||||||
| Operating costs | 131,271 | 105,365 | 87,734 | |||
| Depreciation, depletion and amortization | 183,350 | 118,793 | 114,681 | |||
| Impairment of oil and natural gas properties (Note 2) | 0 | 0 | 281,241 | [1] | ||
| Gas gathering and processing: | ||||||
| Operating costs | 174,859 | 122,146 | 87,908 | |||
| Depreciation and amortization | 16,101 | 15,385 | 16,104 | |||
| General and administrative | 30,055 | 26,152 | 24,011 | |||
| Interest, net | 4,167 | 0 | 539 | |||
| Total expenses | 889,369 | 644,624 | 797,624 | |||
| Income (loss) before income taxes | 319,002 | 237,221 | (87,726) | |||
| Income tax expense (benefit): | ||||||
| Current | (2,416) | (9,935) | (223) | |||
| Deferred | 125,551 | 100,672 | (32,003) | |||
| Total income taxes | 123,135 | 90,737 | (32,226) | |||
| Net income (loss) | $ 195,867 | $ 146,484 | $ (55,500) | |||
| Net income (loss) per common share: | ||||||
| Basic | $ 4.11 | $ 3.10 | $ (1.18) | |||
| Diluted | $ 4.08 | $ 3.09 | $ (1.18) | |||
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| X | ||||||||||
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- Definition
Contract Drilling, Depreciation. No definition available.
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| X | ||||||||||
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- Definition
Contract drilling operating costs including direct and indirect expenses. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Revenue from contract drilling services and mobilization of equipment. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Gas Gathering Transportation Marketing And Processing, Depreciation. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Oil and natural gas depreciation, depletion and amortization. No definition available.
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| X | ||||||||||
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- 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 | ||||||||||
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- Definition
The component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable Income or Loss from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- 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 | ||||||||||
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- 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
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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
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
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| X | ||||||||||
|
- Definition
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net amount of operating interest income (expense). 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
|
| 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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| X | ||||||||||
|
- 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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| X | ||||||||||
|
- Definition
The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. 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 | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
Change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. The after tax effect change includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
Value of stock (or other type of equity) granted during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. This element is not the recognition of equity-based compensation expense in pursuant to FAS 123R. That element is AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue (Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value). 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
|
|
Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Consolidated Statements Of Changes In Shareholders' Equity [Abstract] | |||
| Change in value of derivatives qualifying as cash flow hedges, tax | $ 18,412 | $ 13,254 | $ 20,430 |
| Reclassification - derivative settlements, tax | (1,146) | (19,987) | (37,560) |
| Ineffective portion of derivatives, tax | $ (1,061) | $ (267) | $ 340 |
| Activity in employee compensation plans (shares) | (241,011) | 379,762 | 274,705 |
| X | ||||||||||
|
- Definition
Tax On Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net. No definition available.
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| X | ||||||||||
|
- Definition
Tax effect on reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Details
|
| 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
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| X | ||||||||||
|
- Definition
Increase Decrease In Accounts Payable Related To Purchases Of Property Plant And Equipment No definition available.
|
| X | ||||||||||
|
- Definition
Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in cash and cash equivalents. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to 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
The net gain (loss) resulting from the sale, transfer, termination, or other disposition of assets during the period, excluding transactions involving capital leases, assets-held- or available-for-lease, and other real estate owned which, to the extent appropriate, are included in gains (losses) on the disposition of assets in nonoperating income (expense). No definition available.
|
| X | ||||||||||
|
- Definition
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- 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
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| 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
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| 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
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| 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
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in other 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 the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The amount of cash paid for interest during the period net of cash paid for interest that is capitalized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The net cash inflow or outflow from financing activity for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net cash inflow or outflow from investing activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Details
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| X | ||||||||||
|
- Definition
The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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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
Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. 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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| X | ||||||||||
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- Definition
The cash inflow from a borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in liquidation of the entity's assets or underlying collateral. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| 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
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| 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
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| X | ||||||||||
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- Definition
The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The provision charged to earnings in the period, the offset to which is either added to or deducted from the allowance account, for the purpose of reducing receivables, other than loans, leases, or credit losses, to an amount that approximates their net realizable value (the amount expected to be collected); includes provision for losses associated with foreclosed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The cash outflow to pay off an obligation from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| 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
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| X | ||||||||||
|
- Details
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| X | ||||||||||
|
- Definition
Reductions in the entity's income taxes that arise when compensation cost (from non-qualified stock options) recognized on the entity's tax return exceeds compensation cost from non-qualified stock options recognized on the income statement. This element increases net cash provided by operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| 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
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|
Organization
|
12 Months Ended |
|---|---|
|
Dec. 31, 2011
|
|
| Organization [Abstract] | |
| Organization | NOTE 1 – ORGANIZATION Unless the context clearly indicates otherwise, references in this report to "Unit", "company", "we", "our" "us" or like terms refer to Unit Corporation and its subsidiaries. We are primarily engaged in the land contract drilling of natural gas and oil wells, the exploration, development, acquisition and production of oil and natural gas properties and the buying, selling, gathering, processing and treating of natural gas. Our operations are located principally in the United States and are organized in the following three reporting segments: (1) Contract Drilling, (2) Oil and Natural Gas and (3) Mid-Stream. Contract Drilling. Carried out by our subsidiary, Unit Drilling Company and its subsidiary, we contract to drill onshore oil and natural gas wells for our own account and for others. Our current contract drilling operations are conducted in the oil and natural gas producing provinces of Oklahoma, Texas, Louisiana, Wyoming, Colorado, Utah, Montana and North Dakota. We provide land contract drilling services for a wide range of customers. Oil and Natural Gas. Carried out by our subsidiary, Unit Petroleum Company, we explore, develop, acquire and produce oil and natural gas properties for our own account. Our producing oil and natural gas properties, undeveloped leaseholds and related assets are located mainly in Oklahoma, Texas, Louisiana, North Dakota and, to a lesser extent, in Arkansas, New Mexico, Wyoming, Montana, Alabama, Kansas, Mississippi, Michigan, Colorado and Pennsylvania and a small portion in Canada. Historically, our contract drilling segment has experienced a greater demand for natural gas drilling as opposed to drilling for oil and NGLs. With the current weakened natural gas market, operators are focusing on drilling for oil and NGLs. Mid-Stream. Carried out by our subsidiary, Superior Pipeline Company, L.L.C. and its subsidiary, we buy, sell, gather, process and treat natural gas for our own account and for third parties. Mid-stream operations are performed in Oklahoma, Texas, Kansas, Pennsylvania and West Virginia. |
| X | ||||||||||
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- Details
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| X | ||||||||||
|
- Definition
The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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|
Summary Of Significant Accounting Policies
|
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2011
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| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Significant Accounting Policies | NOTE 2 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation. The consolidated financial statements include the accounts of Unit Corporation and its subsidiaries. Our investment in limited partnerships is accounted for on the proportionate consolidation method, whereby our share of the partnerships' assets, liabilities, revenues and expenses are included in the appropriate classification in the accompanying consolidated financial statements. Certain amounts in the accompanying consolidated financial statements for prior periods have been reclassified to conform to current year presentation. Accounting Estimates. The preparation of financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Drilling Contracts. We recognize revenues and expenses generated from "daywork" drilling contracts as the services are performed, since we do not bear the risk of completion of the well. Under "footage" and "turnkey" contracts, we bear the risk of completion of the well; therefore, revenues and expenses are recognized when the well is substantially completed. Under this method, substantial completion is determined when the well bore reaches the negotiated depth as stated in the contract. The entire amount of a loss, if any, is recorded when the loss is deter-minable. The costs of uncompleted drilling contracts include expenses incurred to date on "footage" or "turnkey" contracts, which are still in process at the end of the period, and are included in other current assets. Typically, any one of these three types of contracts can be used for the drilling of one well which can take from 20 to 90 days. At December 31, 2011, substantially all of our contracts were daywork contracts of which 62 were multi-well and had durations which ranged from six months to three years. These longer term contracts may contain a fixed rate for the duration of the contract or provide for the periodic renegotiation of the rate within a specific range from the existing rate. Cash Equivalents and Book Overdrafts. We include as cash equivalents all investments with maturities at date of purchase of three months or less which are readily convertible into known amounts of cash. Book overdrafts are checks that have been issued before the end of the period, but not presented to our bank for payment before the end of the period. At December 31, 2011 and 2010, book overdrafts were $26.5 million and $13.1 million, respectively, and included in accounts payable. Accounts Receivable. Accounts receivable are carried on a gross basis, with no discounting, less an allowance for doubtful accounts. We estimate the allowance for doubtful accounts based on existing economic conditions, the financial condition of our customers, and the amount and age of past due accounts. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been unsuccessful. Financial Instruments and Concentrations of Credit Risk and Non-performance Risk. Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of trade receivables with a variety of oil and natural gas companies. We do not generally require collateral related to receivables. Our credit risk is considered to be limited due to the large number of customers comprising our customer base. Below are the third-party customers that accounted for more than 10% of our segment's revenues:
We had a concentration of cash of $31.1 million and $23.8 million at December 31, 2011 and 2010, respectively with one bank.
The use of derivative transactions also involves the risk that the counterparties will be unable to meet the financial terms of the transactions. We considered this non-performance risk with regard to our counterparties and our own non-performance risk in our derivative valuation at December 31, 2011 and determined there was no material risk at that time. At December 31, 2011, the fair values of the net assets (liabilities) we had with each of the counterparties with respect to all of our commodity derivative transactions are listed in the table below:
Property and Equipment. Drilling equipment, natural gas gathering and processing equipment, transportation equipment and other property and equipment are carried at cost. Renewals and improvements are capitalized while repairs and maintenance are expensed. Depreciation of drilling equipment is recorded using the units-of-production method based on estimated useful lives starting at 15 years, including a minimum provision of 20% of the active rate when the equipment is idle. We use the composite method of depreciation for drill pipe and collars and calculate the depreciation by footage actually drilled compared to total estimated remaining footage. Depreciation of other property and equipment is computed using the straight-line method over the estimated useful lives of the assets ranging from 3 to 15 years. Realization of the carrying value of property and equipment is reviewed for possible impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Assets are determined to be impaired if a forecast of undiscounted estimated future net operating cash flows directly related to the asset including disposal value if any, is less than the carrying amount of the asset. If any asset is determined to be impaired, the loss is measured as the amount by which the carrying amount of the asset exceeds its fair value. An estimate of fair value is based on the best information available, including prices for similar assets. Changes in such estimates could cause us to reduce the carrying value of property and equipment. No significant impairments were recorded at December 31, 2011, 2010 or 2009. When property and equipment components are disposed of, the cost and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is generally reflected in operations. For dispositions of drill pipe and drill collars, an average cost for the appropriate feet of drill pipe and drill collars is removed from the asset account and charged to accumulated depreciation and proceeds, if any, are credited to accumulated depreciation. We record an asset and a liability equal to the present value of the expected future asset retirement obligation (ARO) associated with our oil and gas properties. The ARO asset is depreciated in a manner consistent with the depreciation of the underlying physical asset. We measure changes in the liability due to passage of time by accreting an interest charge. This amount is recognized as an increase in the carrying amount of the liability and as a corresponding accretion expense.
Goodwill. Goodwill represents the excess of the cost of acquisitions over the fair value of the net assets acquired. Goodwill is not amortized, but an impairment test is performed at least annually to determine whether the fair value has decreased and is performed additionally when events indicate an impairment may have occurred. Goodwill is all related to our contract drilling segment, and accordingly, the impairment test is generally based on the estimated discounted future net cash flows of our drilling segment, utilizing discount rates and other factors in determining the fair value of our drilling segment. No goodwill impairment was recorded for the years ended December 31, 2011, 2010, or 2009. There were no additions to goodwill in 2011, 2010 or 2009. Goodwill of $5.7 million is deductible for tax purposes. Intangible Assets. Intangible assets are capitalized and amortized over the estimated period benefited. Such amounts are reviewed for possible impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. No intangible asset impairment was recorded for the years ended December 31, 2011, 2010 or 2009. Amortization of $1.2 million, $2.6 million and $3.7 million was recorded in 2011, 2010 and 2009, respectively. Accumulated amortization for 2011 and 2010 was $16.1 million and $14.9 million, respectively. Amortization of $1.2 million and $0.7 million is expected to be recorded in 2012 and 2013, respectively. Oil and Natural Gas Operations. We account for our oil and natural gas exploration and development activities using the full cost method of accounting prescribed by the SEC. Accordingly, all productive and non-productive costs incurred in connection with the acquisition, exploration and development of our oil and natural gas reserves, including directly related overhead costs and related asset retirement costs, are capitalized and amortized on a units-of-production method based on proved oil and natural gas reserves. Directly related overhead costs of $15.6 million, $13.4 million and $13.2 million were capitalized in 2011, 2010 and 2009, respectively. Independent petroleum engineers annually audit our internal evaluation of our reserves. The average rates used for depreciation, depletion and amortization (DD&A) were $15.06, $11.94 and $11.22 per Boe in 2011, 2010 and 2009, respectively. The calculation of DD&A includes estimated future expenditures to be incurred in developing proved reserves and estimated dismantlement and abandonment costs, net of estimated salvage values. Our undeveloped leasehold properties totaling $185.6 million are excluded from the DD&A calculation. No gains or losses are recognized on the sale, conveyance or other disposition of oil and natural gas properties unless a significant reserve amount is involved. Revenue from the sale of oil and natural gas is recognized when title passes, net of royalties. Under the full cost rules, at the end of each quarter, we review the carrying value of our oil and natural gas properties. The full cost ceiling is based principally on the estimated future discounted net cash flows from our oil and natural gas properties discounted at 10%. Starting December 31, 2009, companies like us that use full cost accounting moved from using the commodity prices existing on the last day of the period to that of the unweighted arithmetic average of the commodity prices existing on the first day of each of the 12 months before the end of the reporting period to calculate discounted future revenues, unless prices were otherwise determined under contractual arrangements. In the event the unamortized cost of oil and natural gas properties being amortized exceeds the full cost ceiling, as defined by the SEC, the excess is charged to expense in the period during which such excess occurs, even if prices are depressed for only a short period of time. Once incurred, a write-down of oil and natural gas properties is not reversible. We recorded a non-cash ceiling test write-down of $281.2 million pre-tax ($175.1 million, net of tax) during the quarter ending March 31, 2009. This write-down resulted from the reduction in commodity prices existing at the end of the first quarter of 2009 as compared to at the end of 2008. Derivative instruments qualifying as cash flow hedges were included in determining the limitation on the capitalized costs in our March 31, 2009 ceiling test calculation. The effect of including those hedges was a $197.9 million pre-tax increase in the discounted net cash flow of our oil and natural gas properties. Our qualifying cash flow hedges as of March 31, 2009, which consisted of swaps and collars, covered 2009 production of 30.3 Bcfe and 2010 production of 33.2 Bcfe. At December 31, 2010 and December 31, 2011, using the existing 12-month average commodity prices, including the discounted value of our commodity hedges, we were not required to record a ceiling test write-down. However, if there are declines in the 12-month average prices, including the discounted value of our commodity hedges, we may be required to record a write-down in future periods. Our qualifying cash flow hedges used in the ceiling test determination at December 31, 2011, consisted of swaps covering 5.0 MMBoe in 2012 and 0.7 MMBoe in 2013. The effect of those hedges on the December 31, 2011 ceiling test was a $22.1 million pre-tax increase in the discounted net cash flows of our oil and natural gas properties. Even without the impact of those hedges, we would not have been required to take a write-down for the quarter. Our oil and natural gas hedging is discussed in Note 13 of the Notes to our Consolidated Financial Statements. Our contract drilling segment provides drilling services for our exploration and production segment. Depending on their timing some of the drilling services performed on our properties are also deemed to be associated with the acquisition of an ownership interest in the property. Revenues and expenses for such services are eliminated in our income statement, with any profit recognized as a reduction in our investment in our oil and natural gas properties. The contracts for these services are issued under the same conditions and rates as the contracts entered into with unrelated third parties. We eliminated revenue of $52.2 million, $40.1 million and $15.0 million for 2011, 2010 and 2009, respectively from our contract drilling segment and eliminated the associated operating expense of $32.6 million, $31.0 million and $13.7 million during 2011, 2010 and 2009, respectively, yielding $19.6 million, $9.1 million and $1.3 million during 2011, 2010 and 2009, respectively, as a reduction to the carrying value of our oil and natural gas properties.
Gas Gathering and Processing Revenue. Our gathering and processing segment recognizes revenue from the gathering and processing of natural gas and NGLs in the period the service is provided based on contractual terms. Insurance. We are self-insured for certain losses relating to workers' compensation, control of well and employee medical benefits. Insured policies for other coverage contain deductibles or retentions per occurrence that range from $50,000 to $1.5 million. We have purchased stop-loss coverage in order to limit, to the extent feasible, per occurrence and aggregate exposure to certain types of claims. However, there is no assurance that the insurance coverage will adequately protect us against liability from all potential consequences. We have elected to use an ERISA governed occupational injury benefit plan to cover all Texas drilling operations in lieu of covering them under Texas Workers' Compensation. If insurance coverage becomes more expensive, we may choose to self-insure, decrease our limits, raise our deductibles or any combination of these rather than pay higher premiums. Hedging Activities. All derivatives are recognized on the balance sheet and measured at fair value. If a derivative is designated as a cash flow hedge, we measure the effectiveness of the hedge, or the degree that the gain (loss) for the hedging instrument offsets the loss (gain) on the hedged item, at each reporting period. The effective portion of the gain (loss) on the derivative instrument is recognized in other comprehensive income as a component of equity and subsequently reclassified into earnings when the forecasted transaction affects earnings. The ineffective portion of a derivative's change in fair value is required to be recognized in earnings immediately. Derivatives that do not qualify for hedge treatment are recorded at fair value with gains (losses) recognized in earnings in the period of change.
We document our risk management strategy and hedge effectiveness at the inception of and during the term of each hedge.
Limited Partnerships. Unit Petroleum Company is a general partner in 16 oil and natural gas limited partnerships sold privately and publicly. Some of our officers, directors and employees own the interests in most of these partnerships. We share in each partnership's revenues and costs in accordance with formulas set out in each of the limited partnership agreement. The partnerships also reimburse us for certain administrative costs incurred on behalf of the partnerships. Income Taxes. Measurement of current and deferred income tax liabilities and assets is based on provisions of enacted tax law; the effects of future changes in tax laws or rates are not included in the measurement. Valuation allowances are established where necessary to reduce deferred tax assets to the amount expected to be realized. Income tax expense is the tax payable for the year and the change during that year in deferred tax assets and liabilities. The accounting for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a return. Guidance is also provided on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. We have no unrecognized tax benefits and we do not expect any significant changes in unrecognized tax benefits in the next twelve months.
Natural Gas Balancing. We use the sales method for recording natural gas sales. This method allows for recognition of revenue, which may be more or less than its share of pro-rata production from certain wells. We estimate our December 31, 2011 balancing position to be approximately 3.4 Bcf on under-produced properties and approximately 3.3 Bcf on over-produced properties. We have recorded a receivable of $1.5 million on certain wells where we estimate that insufficient reserves are available for us to recover the under-production from future production volumes. We have also recorded a liability of $3.3 million on certain properties where we believe there are insufficient reserves available to allow the under-produced owners to recover their under-production from future production volumes. Our policy is to expense the pro-rata share of lease operating costs from all wells as incurred. Such expenses relating to the balancing position on wells in which we have imbalances are not material. Employee and Director Stock Based Compensation. We recognize in our financial statements the cost of employee services received in exchange for awards of equity instruments based on the grant date fair value of those awards. The amount of our equity compensation cost relating to employees directly involved in our oil and natural gas segment is capitalized to our oil and natural gas properties. Amounts not capitalized to our oil and natural gas properties are recognized in general and administrative expense and operating costs of our business segments. We utilize the Black-Scholes option pricing model to measure the fair value of stock options and stock appreciation rights (SARs). The value of our restricted stock grants is based on the closing stock price on the date of the grants. Impact of Financial Accounting Pronouncements. Improving Disclosures about Fair Value Measurements. In January 2010, the FASB issued ASU 2010-06—Fair Value Measurements and Disclosures (ASC 820): Improving Disclosures about Fair Value Measurements, which provides additional guidance to improve disclosures regarding fair value measurements. The ASU amends ASC 820-10, Fair Value Measurements and Disclosures—Overall (formerly FAS 157, Fair Value Measurements) to add two new disclosures: (1) transfers in and out of Level 1 and 2 measurements and the reasons for the transfers, and (2) a gross presentation of activity within the Level 3 roll forward. The ASU also includes clarifications to existing disclosure requirements on the level of disaggregation and disclosures regarding inputs and valuation techniques. The ASU applies to all entities required to make disclosures about recurring and nonrecurring fair value measurements. The effective date of the ASU was the first interim or annual reporting period beginning after December 15, 2009 and was adopted January 1, 2010, except for the gross presentation of the Level 3 roll forward information, which was adopted January 1, 2011. Because it only includes enhanced disclosures, this statement did not have a significant impact on us. Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards (IFRS). In May 2011, the FASB issued ASU 2011-04 Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS. ASU 2011-4 is intended to improve the comparability of fair value measurements presented and disclosed in financial statements prepared in accordance with U.S. GAAP and IFRS. The amendments are of two types: (i) those that clarify the Board's intent about the application of existing fair value measurement and disclosure requirements and (ii) those that change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. The update is effective for annual periods beginning after December 15, 2011. We are in the process of evaluating the impact, if any, the adoption of this update will have on our financial statements. Presentation of Comprehensive Income. In June 2011, the FASB issued ASU 2011-05—Presentation of Comprehensive Income. This ASU amends the Codification to allow an entity the option to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. ASU 2011-05 eliminates the option to present the components of other comprehensive income as part of the statement of changes in stockholders' equity. The amendments to the Codification in the ASU do not change the items that must be reported in other comprehensive income or when an item of other comprehensive income must be reclassified to net income. ASU 2011-05 should be applied retrospectively. The amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. We are in the process of evaluating the option we will choose to present comprehensive income and the impact it will have on our financial statements. Testing Goodwill for Impairment. In August 2011, the FASB issued ASU 2011-08—Intangibles-Goodwill and Other (ASC 350): Testing Goodwill for Impairment. This ASU is intended to simplify how entities, both public and nonpublic, test goodwill for impairment. ASU 2011-08 permits an entity to first assess qualitative factors to determine whether it is "more likely than not" that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test described in ASC 350, Intangibles-Goodwill and Other. The more-likely-than-not threshold is defined as having a likelihood of more than 50%. ASU 2011-08 is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. |
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| Acquisitions | NOTE 3 – ACQUISITIONS On June 2, 2010, we completed an acquisition of oil and natural gas properties from certain unaffiliated parties in an effort to explore and develop more oil rich plays. The properties were purchased for approximately $73.7 million in cash, after post closing adjustments. The purchase price allocation was $48.7 million for proved properties and $25.0 million for undeveloped leasehold not being amortized. The acquisition included approximately 45,000 net leasehold acres and 10 producing oil wells. This acquisition targeted the Marmaton horizontal oil play located mainly in Beaver County, Oklahoma. At the time of acquisition, proved developed producing net reserves associated with the 10 acquired producing wells was approximately 762,000 BOE—consisting of 511,000 barrels of oil, 155,000 barrels of NGLs and 573 MMcf of natural gas. Also during the second quarter of 2010, we completed an acquisition from unaffiliated parties consisting of approximately 32,000 net acres of undeveloped oil and gas leasehold located in Southwest Oklahoma and North Texas for approximately $17.6 million. On July 20, 2011, we acquired certain producing properties from an unaffiliated seller for approximately $12.3 million in cash, after post-closing adjustments, consisting of 30 operated wells and 59 non-operated well interests located in Beaver, Harper and Ellis Counties in Oklahoma and Lipscomb County, Texas. The purchase price allocation was $8.4 million for proved properties and $3.9 million for acreage. The net proved developed reserves associated with the acquisition are estimated at 6.6 Bcfe (91% natural gas) with production of 1.7 MMcfe per day. The acquisition also included in excess of 12,000 net acres held by production available for future development. On August 31, 2011, we acquired certain producing oil and gas properties for $30.5 million in cash, subject to closing adjustments, from an unaffiliated seller. Included in the acquisition were more than 500 wells located principally in the Oklahoma Arkoma Woodford and Hartshorne Coal plays along with other properties located throughout Oklahoma and Texas. The proved reserves associated with the acquisition are approximately 31.2 Bcfe (99% natural gas), 83% of which is proved developed. The acquisition also included approximately 55,000 net acres of which 96% is held by production. During the fourth quarter of 2011, we leased approximately 60,000 net acres of undeveloped oil and gas leasehold located in south central Kansas for approximately $17.3 million. |
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| Earnings (Loss) Per Share | NOTE 4 – EARNINGS (LOSS) PER SHARE The following data shows the amounts used in computing earnings (loss) per share:
Due to the net loss for 2009, approximately 373,000 weighted average shares related to stock options, restricted stock and SARs were antidilutive and were excluded from the earnings per share calculation above. The following options and their average exercise prices were not included in the computation of diluted earnings per share because the option exercise prices were greater than the average market price of our common stock for the years ended December 31:
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| Accrued Liabilities | NOTE 5 – ACCRUED LIABILITIES Accrued liabilities consisted of the following as of December 31:
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| Long-Term Debt And Other Long-Term Liabilities | NOTE 6 – LONG-TERM DEBT AND OTHER LONG-TERM LIABILITIES Long-Term Debt As of the dates in the table, long-term debt consisted of the following:
Credit Agreement. On September 13, 2011, we entered into a Senior Credit Agreement (credit agreement) that replaces our previous credit agreement which was scheduled to mature on May 24, 2012. The credit agreement has a maturity date of September 13, 2016. The amount available to be borrowed is the lesser of the amount we elect as the commitment amount (currently $250.0 million) or the value of the borrowing base as determined by the lenders (currently $600.0 million), but in either event, not to exceed the maximum credit agreement amount of $750.0 million. We are charged a commitment fee ranging from 0.375 to 0.50 of 1% on the amount available but not borrowed. The rate varies based on the amount borrowed as a percentage of the amount of the total borrowing base. To date, in connection with this new credit agreement, we paid $1.8 million in origination, agency, syndication and other related fees. We are amortizing these fees over the life of the credit agreement.
The amount of the borrowing base, which is subject to redetermination on April 1st and October 1st of each year, is based primarily 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 amount 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 set forth in the credit agreement. At our election, any part of the outstanding debt under the credit agreement may be fixed at a London Interbank Offered Rate (LIBOR). LIBOR interest is computed as the sum of the LIBOR base for the applicable term plus 1.75% to 2.50% 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, which cannot be less than LIBOR plus 1.00%, and is payable at the end of each month and the principal borrowed may be paid at any time, in part or in whole, without a premium or penalty. At December 31, 2011, all of our $50.0 million in outstanding borrowings were subject to LIBOR. We used borrowings under the credit agreement to pay off the commitments issued under our previous credit agreement. In addition, 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, (c) issuance of standby letters of credit, (d) contract drilling services, and (e) general corporate purposes of the Borrowers. The credit agreement prohibits, among other things:
The credit agreement also requires that we have at the end of each quarter:
As of December 31, 2011, we were in compliance with the covenants contained in the credit agreement. 6.625% Senior Subordinated Notes. On May 18, 2011, we completed the sale of $250.0 million aggregate principal amount of our 6.625% Senior Subordinated Notes due 2021 (the Notes). The Notes were issued at par and mature on May 15, 2021. We received net proceeds of approximately $244.0 million after deducting fees of approximately $6.0 million. Those fees are being amortized as deferred financing costs over the life of the Notes. We used the net proceeds to repay outstanding borrowings under our credit agreement, which was $220.3 million on May 18, 2011. The remaining proceeds were used for general working capital purposes. The Notes are guaranteed by our wholly-owned domestic direct and indirect subsidiaries (the Guarantors). Unit, as the parent company, has no independent assets or operations. The guarantees registered under the registration statement are full and unconditional and joint and several, subject to certain automatic customary releases, including sale, disposition, or transfer of the capital stock or substantially all of the assets of a subsidiary guarantor, exercise of legal defeasance option or covenant defeasance option, and designation of a subsidiary guarantor as unrestricted in accordance with the Indenture. Any subsidiaries of Unit other than the Guarantors are minor. There are no significant restrictions on the ability of Unit to receive funds from its subsidiaries through dividends, loans, advances or otherwise.
The Notes were issued under an Indenture dated as of May 18, 2011, between us and 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, establishing the terms and providing for the issuance of the Notes (the Supplemental Indenture). The discussion of the Notes in this annual report is qualified by and subject to the actual terms of the Indenture and the First Supplemental Indenture. The Notes bear interest at a rate of 6.625% per year (payable semi-annually in arrears on May 15 and November 15 of each year), and will mature on May 15, 2021. On and after May 15, 2016, we may redeem all or, from time to time, a part of the Notes at certain redemption prices, plus accrued and unpaid interest. Before May 15, 2014, we may on any one or more occasions redeem up to 35% of the original principal amount of the Notes with the net cash proceeds of one or more equity offerings at a redemption price of 106.625% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date, provided that at least 65% of the original principal amount of the Notes remains outstanding after each redemption. In addition, at any time before May 15, 2016, we may redeem the Notes, in whole or in part, at a redemption price equal to 100% of the principal amount plus a "make whole" premium, plus accrued and unpaid interest, if any, to the redemption date. 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, if any, to the date of purchase. The Indenture and the Supplemental Indenture contain customary events of default. The Indenture governing the Notes contains covenants that, among other things, 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 December 31, 2011. Other Long-Term Liabilities Other long-term liabilities consisted of the following as of December 31:
Estimated annual principle payments under the terms of debt and other long-term liabilities from 2012 through 2016 are $12.2 million, $3.1 million, $20.0 million, $2.9 million and $52.9 million, respectively. |
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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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Dec. 31, 2011
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| Asset Retirement Obligations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Asset Retirement Obligations | NOTE 7 – 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 (AROs). 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 of our AROs relate to 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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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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Income Taxes
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Dec. 31, 2011
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| Income Taxes [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | NOTE 8 – INCOME TAXES A reconciliation of income tax expense (benefit), computed by applying the federal statutory rate to pre-tax income to our effective income tax expense is as follows:
For the periods indicated, the total provision for income taxes consisted of the following:
Deferred tax assets and liabilities are comprised of the following at December 31:
Realization of the deferred tax assets are dependent on generating sufficient future taxable income. Although realization is not assured, management believes it is more likely than not that the deferred tax asset will be realized. The amount of the deferred tax asset considered realizable, however, could be reduced in the near-term if estimates of future taxable income are reduced. At December 31, 2011, we have federal net operating loss carryforwards of approximately $119.8 million which expire from 2015 to 2031. |
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The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Employee Benefit Plans
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Dec. 31, 2011
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| Employee Benefit Plans [Abstract] | |
| Employee Benefit Plans | NOTE 9 – EMPLOYEE BENEFIT PLANS Under our 401(k) Employee Thrift Plan, employees who meet specified service requirements may contribute a percentage of their total compensation, up to a specified maximum, to the plan. We may match each employee's contribution, up to a specified maximum, in full or on a partial basis. We made discretionary contributions under the plan of 71,742, 74,205 and 202,655 shares of common stock and recognized expense of $4.3 million, $3.6 million and $3.6 million in 2011, 2010 and 2009, respectively. We provide a salary deferral plan (Deferral Plan) which allows participants to defer the recognition of salary for income tax purposes until actual distribution of benefits which occurs at either termination of employment, death or certain defined unforeseeable emergency hardships. The liability recorded under the Deferral Plan at December 31, 2011 and 2010 was $2.5 million and $2.4 million, respectively. We recognized payroll expense and recorded a liability at the time of deferral. Effective January 1, 1997, we adopted a separation benefit plan (Separation Plan). The Separation Plan allows eligible employees whose employment is involuntarily terminated or, in the case of an employee who has completed 20 years of service, voluntarily or involuntarily terminated, to receive benefits equivalent to four weeks salary for every whole year of service completed up to a maximum of 104 weeks. To receive payments, the recipient must waive any claims against us in exchange for receiving the separation benefits. On October 28, 1997, we adopted a Separation Benefit Plan for Senior Management (Senior Plan). The Senior Plan provides certain officers and key executives of Unit with benefits generally equivalent to the Separation Plan. The Compensation Committee of the Board of Directors has absolute discretion in the selection of the individuals covered in this plan. On May 5, 2004 we also adopted the Special Separation Benefit Plan (Special Plan). This plan is identical to the Separation Benefit Plan with the exception that the benefits under the plan vest on the earliest of a participant's reaching the age of 65 or serving 20 years with the company.
On December 31, 2008, we amended all three Plans to be in compliance with Section 409A of the Internal Revenue Code of 1986, as amended. The key amendments to the Plans address, among other things, when distributions may be made, the timing of payments, and the circumstances under which employees become eligible to receive benefits. None of the amendments materially increase the benefits, grants or awards issuable under the Plans. We recognized expense of $1.9 million, $1.6 million and $1.5 million in 2011, 2010 and 2009, respectively, for benefits associated with anticipated payments from these separation plans. We have entered into key employee change of control contracts with three of our current executive officers. These severance contracts have an initial three-year term that is automatically extended for one year on each anniversary, unless a notice not to extend is given by us. If a change of control of the company, as defined in the contracts, occurs during the term of the severance contract, then the contract becomes operative for a fixed three-year period. The severance contracts generally provide that the executive's terms and conditions for employment (including position, work location, compensation and benefits) will not be adversely changed during the three-year period after a change of control. If the executive's employment is terminated (other than for cause, death or disability), the executive terminates for good reason during such three-year period, or the executive terminates employment for any reason during the 30-day period following the first anniversary of the change of control, and on certain terminations prior to a change of control or in connection with or in anticipation of a change of control, the executive is generally entitled to receive, in addition to certain other benefits, any earned but unpaid compensation; up to 2.9 times the executive's base salary plus annual bonus (based on historic annual bonus); and the company matching contributions that would have been made had the executive continued to participate in the company's 401(k) plan for up to an additional three years. The severance contract provides that the executive is entitled to receive a payment in an amount sufficient to make the executive whole for any excise tax on excess parachute payments imposed under Section 4999 of the Code. As a condition to receipt of these severance benefits, the executive must remain in the employ of the company prior to change of control and render services commensurate with his position. |
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Transactions With Related Parties
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Dec. 31, 2011
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| Transactions With Related Parties | NOTE 10 – TRANSACTIONS WITH RELATED PARTIES Unit Petroleum Company serves as the general partner of 16 oil and gas limited partnerships. Three were formed for investment by third parties and 13 (the employee partnerships) were formed to allow certain of our qualified employees and our directors to participate in Unit Petroleum's oil and gas exploration and production operations. The partnerships for the third party investments were formed in 1984 and 1986. Employee partnerships have been formed for each year beginning with 1984 and ending with 2011. Interests in the employee partnerships were offered to the employees of Unit and its subsidiaries whose annual base compensation was at least a specified amount ($36,000 for 2011, 2010 and 2009) and to the directors of Unit. The employee partnerships formed in 1984 through 1990 were consolidated into a single consolidating partnership in 1993 and the employee partnerships formed in 1991 through 1999 were also consolidated into the consolidating partnership in 2002. The consolidation of the 1991 through the 1999 employee partnerships was done by the general partners under the authority contained in the respective partnership agreements and did not involve any vote, consent or approval by the limited partners. The employee partnerships have each had a set percentage (ranging from 1% to 15%) of our interest in most of the oil and natural gas wells we drill or acquire for our own account during the particular year for which the partnership was formed. The total interest the employees have in our oil and natural gas wells by participating in these partnerships does not exceed one percent.
Amounts received in the years ended December 31, from both public and private Partnerships for which Unit is a general partner are as follows:
Related party transactions for contract drilling and well supervision fees are the related party's share of such costs. These costs are billed to related parties on the same basis as billings to unrelated parties for such services. General and administrative reimbursements are both direct general and administrative expense incurred on the related party's behalf and indirect expenses allocated to the related parties. Such allocations are based on the related party's level of activity and are considered by management to be reasonable. On November 21, 2011, Superior Pipeline Company, L.L.C. (Superior), a wholly-owned subsidiary of ours, entered a Gas Purchase Agreement with Sullivan and Company, L.L.C. (Sullivan), an Oklahoma limited liability company for which Robert Sullivan, Jr., one the Company's directors, is a principal. Under the terms of the agreement, Sullivan is selling natural gas from 23 wells in northern Oklahoma to Superior, which will gather, process and sell purchased volumes. The term of the agreement is for a five-year period, after which it will be on a year-to-year basis until terminated by either party on sixty days written notice. Volumes sold are not dedicated under the agreement, and volumes are purchased at Superior's discretion. Proceeds from sales of volumes gathered and processed under the agreement are to be paid 90% to Sullivan and 10% to Superior. The agreement is the result of an arm's length transaction reflecting market rate terms and conditions comparable to other gas purchase agreements negotiated by Superior with similarly situated sellers of natural gas in the same market during the same general time frame. |
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The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Shareholder Rights Plan
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Dec. 31, 2011
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| Shareholder Rights Plan [Abstract] | |
| Shareholder Rights Plan | NOTE 11 – SHAREHOLDER RIGHTS PLAN We maintain a Shareholder Rights Plan (the Plan) designed to deter coercive or unfair takeover tactics, to prevent a person or group from gaining control of us without offering fair value to all our shareholders and to deter other abusive takeover tactics, which are not in the best interest of shareholders. Under the terms of the Plan, each share of common stock is accompanied by one right, which given certain acquisition and business combination criteria, entitles the shareholder to purchase from us one one-hundredth of a newly issued share of Series A Participating Cumulative Preferred Stock at a price subject to adjustment by us or to purchase from an acquiring company certain shares of its common stock or the surviving company's common stock at 50% of its value. The rights become exercisable 10 days after we learn that an acquiring person (as defined in the Plan) has acquired 15% or more of the outstanding common stock of Unit or 10 business days after the commencement of a tender offer, which would result in a person owning 15% or more of our shares. We can redeem the rights for $0.01 per right at any date before the earlier of (i) the close of business on the 10th day following the time we learn that a person has become an acquiring person or (ii) May 19, 2015 (the "Expiration Date"). The rights will expire on the Expiration Date, unless redeemed earlier by Unit. |
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Shareholder Rights Plan No definition available.
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Stock-Based Compensation
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Dec. 31, 2011
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| Stock-Based Compensation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock-Based Compensation | NOTE 12 – STOCK-BASED COMPENSATION For restricted stock awards, stock options and SARs, we had:
The remaining unrecognized compensation cost related to unvested awards at December 31, 2011 is approximately $8.4 million with $1.7 million of this amount anticipated to be capitalized. The weighted average period of time over which this cost will be recognized is 0.8 years. The following table estimates the fair value of each option and SARs granted under all of our plans during the twelve month periods ending December 31, using the Black-Scholes model applying the estimated values presented in the table:
Expected volatilities are based on the historical volatility of our stock. We use historical data to estimate option exercise and employee termination rates within the model and aggregate groups of employees that have similar historical exercise behavior for valuation purposes. To date, we have not paid dividends on our stock. The risk free interest rate is computed from the United States Treasury Strips rate using the term over which it is anticipated the grant will be exercised. At our annual meeting on May 3, 2006, our shareholders approved the Unit Corporation Stock and Incentive Compensation Plan. This plan allows for the issuance of 2.5 million shares of common stock with 2.0 million shares being the maximum number of shares that can be issued as "incentive stock options." Awards under this plan may be granted in any one or a combination of the following:
This plan also contains various limits as to the amount of awards that can be given to an employee in any fiscal year. All awards are generally subject to the minimum vesting periods, as determined by our Compensation Committee and included in the award agreement. During 2009, there were 116,826 shares of other stock-based awards issued under this plan. These shares vested immediately and the fair value on the grant date was $3.3 million. Activity pertaining to SARs granted under the Unit Corporation Stock and Incentive Compensation Plan is as follows:
There were no SARs granted in 2011, 2010 or 2009. The SARs expire after 10 years from the date of the grant. In 2011, 2010 and 2009, 33,745, 48,632 and 48,633 shares vested. The aggregate intrinsic value of the 145,901 shares outstanding subject to vesting at December 31, 2011 was $0.2 million with a weighted average remaining contractual term of 5.7 years.
Activity pertaining to restricted stock awards granted under the Unit Corporation Stock and Incentive Compensation Plan is as follows:
The restricted stock awards vest in periods ranging from one to three years, except for a portion of those granted to certain executive officers in the first quarter of 2011. Thirty percent of the shares granted to the designated executive officers, or 20,062 shares (the performance shares), will cliff vest in the first half of 2014. The actual number of performance shares that vest in 2014 will be based on the company's achievement of certain performance criteria over a three-year period, and will range from 50% to 150% of the 20,062 restricted shares granted as performance shares. The fair value of the restricted stock granted in 2011 and 2010 at the grant date was $10.8 million and $16.9 million, respectively. There was no restricted stock granted in 2009. The aggregate intrinsic value of the 190,262 shares of restricted stock on their 2011 vesting date was $10.1 million. The aggregate intrinsic value of the 447,961 shares outstanding subject to vesting at December 31, 2011 was $20.8 million with a weighted average remaining life of 1.0 year. We also have a Stock Option Plan, which provided for the granting of options for up to 2,700,000 shares of common stock to officers and employees. The option plan permitted the issuance of qualified or nonqualified stock options. Options granted typically become exercisable at the rate of 20% per year one year after being granted and expire after 10 years from the original grant date. The exercise price for options granted under this plan is the fair market value of the common stock on the date of the grant. As a result of the approval of the adoption of the Unit Corporation Stock and Incentive Compensation Plan, no further awards will be made under this plan.
Activity pertaining to the Stock Option Plan is as follows:
There were no shares that vested in 2011. The total grant date fair value of the 6,200, and 27,100 shares vesting in 2010 and 2009 was $0.2 million and $1.0 million. The intrinsic value of options exercised in 2011 was $1.3 million. Total cash received from the options exercised in 2011 was $0.4 million.
Options for 138,980, 184,065 and 212,725 shares were exercisable with weighted average exercise prices of $31.39, $31.02 and $29.25 at December 31, 2011, 2010 and 2009, respectively. The aggregate intrinsic value of the 138,980 shares outstanding subject to options at December 31, 2011 was $2.1 million with a weighted average remaining contractual term of 2.5 years. On May 29, 2009, the compensation committee and board of directors, approved amendments to the existing Unit Corporation 2000 Non-Employee Directors' Stock Option Plan. The amendments extended the plan term from May 30, 2010 to May 30, 2017, and increased the aggregate number of shares that may be issued or delivered due to exercise of non-employee director option awards from 210,000 shares of common stock to 510,000 shares of common stock. Under the plan, on the first business day following each annual meeting of shareholders, each person who was then a member of our Board of Directors and who was not then an employee of the company or any of its subsidiaries was granted an option to purchase 3,500 shares of common stock. The option price for each stock option is the fair market value of the common stock on the date the stock options are granted. The term of each option is 10 years and cannot be increased and no stock options may be exercised during the first six months of its term except in case of death.
On the first day following the 2009 annual meeting, each non-employee director was granted 437 shares of common stock. Effective with the adoption of the amendments mentioned above, a contingent one-time grant of 3,063 shares to each non-employee director was made on May 29, 2009. These contingent option awards vested when the stockholders approved the amended plan at the May 5, 2010 annual meeting. Activity pertaining to the Directors' Plan is as follows:
The total grant date fair value of the 31,500, 52,504 and 3,496 shares vesting in 2011, 2010 and 2009, respectively, was $0.7 million, $0.8 million and $0.1 million, respectively. The intrinsic value of options exercised in 2011 was $0.4 million. Total cash received from options exercised in 2011 was $0.2 million.
Options for 199,500, 178,500 and 143,496 shares were exercisable with weighted average exercise prices of $48.37, $45.86 and $49.38 at December 31, 2011, 2010 and 2009, respectively. The aggregate intrinsic value of the shares outstanding subject to options at December 31, 2011 was $1.2 million with a weighted average remaining contractual term of 6.1 years. |
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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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| Derivatives | NOTE 13 – DERIVATIVES Interest Rate Swaps From time to time we enter into interest rate swaps to manage our exposure to possible future interest rate increases under our credit agreement. Under these transactions we swap the variable interest rate we would otherwise pay on a portion of our bank debt for a fixed interest rate. In May 2011, in association with the repayment of outstanding borrowings under our credit agreement, we terminated our two outstanding interest rate swaps that were previously accounted for as cash flow hedges, resulting in an increase of approximately $1.5 million in interest expense. Approximately $1.1 million of that expense was capitalized and will be amortized over the life of the assets. Commodity Derivatives We have entered into various types of derivative transactions covering some of our projected natural gas, NGLs 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 hedged is based, in part, on our view of current and future market conditions. As of December 31, 2011, our derivative transactions consisted only of swaps. Swaps are where we receive or pay a fixed price for the hedged commodity and pay or receive a floating market price to the counterparty. The fixed-price payment and the floating-price payment are netted, resulting in a net amount due to or from the counterparty. Oil and Natural Gas Segment: At December 31, 2011, the following cash flow hedges were outstanding:
Subsequent to December 31, 2011, the following cash flow hedges were entered into:
The following tables present the fair values of our derivative transactions and the location within our balance sheets where those values are recorded:
If a legal right of set-off exists, we net the value of the derivative transactions we have with the same counterparty in our balance sheets. We recognize in accumulated other comprehensive income (OCI) the effective portion of any changes in fair value and reclassify the recognized gains (losses) on the sales to revenue and the purchases to expense as the underlying transactions are settled. As of December 31, 2011 and 2010, we had a gain of $19.0 million and a loss of $6.9 million, net of tax, respectively, in accumulated OCI. Based on market prices at December 31, 2011, we expect to transfer a gain of approximately $18.0 million, net of tax, included in accumulated OCI during the next 12 months in the related month of settlement. The commodity derivative instruments existing as of December 31, 2011 are expected to mature by December 2013.
Certain derivatives do not qualify for designation as cash flow hedges. We had three basis swaps that did not qualify as cash flow hedges that expired in December 2011. For these derivatives, any changes in their fair value occurring before their maturity (i.e., temporary fluctuations in value) are reported in oil and natural gas revenues in our consolidated statements of operations. Changes in the fair value of derivatives designated as cash flow hedges, to the extent they are effective in offsetting cash flows attributable to the hedged risk, are recorded in OCI until the hedged item is recognized into earnings. Any change in fair value resulting from ineffectiveness is recognized in our oil and natural gas revenues. Effect of Derivative Instruments on the Consolidated Balance Sheets (cash flow hedges) for the year ended December 31:
Effect of derivative instruments on the Consolidated Statement of Operations (cash flow hedges) for the year ended December 31:
Effect of Derivative Instruments on the Consolidated Statement of Operations (derivatives not designated as hedging instruments) for the year ended December 31:
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The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| Fair Value Measurements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements | NOTE 14 – FAIR VALUE MEASUREMENTS Fair value is defined as the amount that would be received from the sale of an asset or paid for the transfer of 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:
The following methods and assumptions were used to estimate the fair values of the assets and liabilities in the table above. Level 2 Fair Value Measurements Commodity Derivatives. We measure the fair values of our crude oil swaps using estimated internal discounted cash flow calculations based on the NYMEX futures index.
Level 3 Fair Value Measurements Interest Rate Swaps. The fair values of our interest rate swaps are based on estimates provided by our respective counterparties and reviewed internally against established index prices and other sources. Commodity Derivatives. The fair values of our natural gas, NGLs and basis swaps 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 tables are reconciliations of our level 3 fair value measurements:
Based on our valuation at December 31, 2011, we determined that the non-performance risk with regard to our counterparties was immaterial. Fair Value of Other Financial Instruments The following disclosure of the estimated fair value of financial instruments is made in accordance with accounting guidance for financial instruments. We have determined the estimated fair values by using available market information and valuation methodologies. Considerable judgment is required in interpreting market data to develop the estimates of fair value. The use of different market assumptions or valuation methodologies may have a material effect on the estimated fair value amounts. At December 31, 2011, the carrying values on the consolidated balance sheets for cash and cash equivalents, 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 currently available to us for credit agreement debt with similar terms and maturities and consideration of our non-performance risk, long-term debt associated with our credit agreement at December 31, 2011 approximates its fair value.
The carrying amount of long-term debt associated with the Notes reported in the consolidated balance sheet as of December 31, 2011 was $250.0 million. We estimate the fair value of these Notes using quoted marked prices at December 31, 2011 was $250.6 million. |
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Tabular disclosure of the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) 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 or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), 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); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commitments And Contingencies
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| Commitments And Contingencies [Abstract] | |
| Commitments And Contingencies | NOTE 15 – COMMITMENTS AND CONTINGENCIES We lease office space or yards in Elmwood, Elk City, Oklahoma City, Quinton and Tulsa, Oklahoma; Canadian and Houston, Texas; Denver and Englewood, Colorado; Pinedale, Wyoming; and Pittsburgh, Pennsylvania under the terms of operating leases expiring through September, 2015. Additionally, we have several 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 $6.2 million, $4.5 million, $1.9 million and $0.2 million in 2012-2015, respectively. Total rent expense incurred was $3.7 million, $1.8 million and $2.1 million in 2011, 2010 and 2009, respectively. The Unit 1984 Oil and Gas Limited Partnership and the 1986 Energy Income Limited Partnership agreements along with 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 the future. These repurchases in any one year are limited to 20% of the units outstanding. We made repurchases of $22,000 in 2011, $22,000 in 2010 and $1,000 in 2009. 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. The amount of any potential liability is determined by considering, among other matters, incremental direct costs of any likely remediation and the proportionate cost of employees who are expected to devote a significant amount of 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. For the next twelve months, we have committed to purchase approximately $6.6 million of new drilling rig components, drill pipe, drill collars and related equipment and $0.3 million remaining towards a gas treating plant. We are subject to various legal proceedings arising in the ordinary course of our various businesses none of which, in our opinion, will result in judgments which would have a material adverse effect on our financial position, operating results or cash flows. |
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| Industry Segment Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Industry Segment Information | NOTE 16 – INDUSTRY SEGMENT INFORMATION We have three main business segments offering different products and services:
The contract drilling segment is engaged in the land contract drilling of oil and natural gas wells. The oil and natural gas segment is engaged in the development, acquisition and production of oil and natural gas properties and the mid-stream segment is engaged in the buying, selling, gathering, processing and treating of natural gas. 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. Our oil and natural gas production outside the United States is not significant.
The following table provides certain information about the operations of each of our segments:
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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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| Selected Quarterly Financial Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Selected Quarterly Financial Information | NOTE 17 – SELECTED QUARTERLY FINANCIAL INFORMATION Summarized unaudited quarterly financial information is as follows:
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The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Dec. 31, 2011
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| Supplemental Oil And Gas Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Oil And Gas Disclosures | SUPPLEMENTAL OIL AND GAS DISCLOSURES (UNAUDITED) Our oil and gas operations are substantially located in the United States. We do have operations in Canada that are insignificant. The capitalized costs at year-end and costs incurred during the year were as follows:
The following table shows a summary of the oil and natural gas property costs not being amortized at December 31, 2011, by the year in which such costs were incurred:
Unproved properties not subject to amortization relates to properties which are not individually significant and consist primarily of lease acquisition costs. The evaluation process associated with these properties has not been completed and therefore, the company is unable to estimate when these costs will be included in the amortization calculation. The results of operations for producing activities are as follows:
Estimated quantities of proved developed oil, liquids and natural gas reserves and changes in net quantities of proved developed and undeveloped oil, liquids and natural gas reserves were as follows:
Estimates of oil, NGLs and natural gas reserves require extensive judgments of reservoir engineering data. Assigning monetary values to such estimates does not reduce the subjectivity and changing nature of such reserve estimates. Indeed the uncertainties inherent in the disclosure are compounded by applying additional estimates of the rates and timing of production and the costs that will be incurred in developing and producing the reserves. The information set forth in this report is, therefore, subjective and, since judgments are involved, may not be comparable to estimates submitted by other oil and natural gas producers. In addition, since prices and costs do not remain static and no price or cost escalations or de-escalations have been considered, the results are not necessarily indicative of the estimated fair market value of estimated proved reserves, nor of estimated future cash flows. The standardized measure of discounted future net cash flows (SMOG) was calculated using 12-month average prices and year-end costs and statutory tax rates, adjusted for permanent differences that relate to existing proved oil, NGLs and natural gas reserves. SMOG as of December 31 is as follows:
The principal sources of changes in the standardized measure of discounted future net cash flows were as follows:
Certain information concerning the assumptions used in computing SMOG and their inherent limitations are discussed below. We believe this information is essential for a proper understanding and assessment of the data presented.
The assumptions used to compute SMOG do not necessarily reflect our expectations of actual revenues to be derived from those reserves nor their present worth. Assigning monetary values to the reserve quantity estimation process does not reduce the subjective and ever-changing nature of reserve estimates. Additional subjectivity occurs when determining present values because the rate of producing the reserves must be estimated. In addition to difficulty inherent in predicting the future, variations from the expected production rate could result from factors outside of our control, such as unintentional delays in development, environmental concerns or changes in prices or regulatory controls. Also, the reserve valuation assumes that all reserves will be disposed of by production. However, other factors such as the sale of reserves in place could affect the amount of cash eventually realized. The December 31, 2011, future cash flows were computed by applying the unescalated 12-month average prices of $96.19 per barrel for oil, $61.78 per barrel for NGLs and $4.12 per Mcf for natural gas, adjusted for price differentials, relating to proved reserves and to the year-end quantities of those reserves. Prior to 2009, the price was based on the single-day period-end price. Future price changes are considered only to the extent provided by contractual arrangements in existence at year-end. Future production and development costs are computed by estimating the expenditures to be incurred in developing and producing the proved oil, NGLs and natural gas reserves at the end of the year, based on continuation of existing economic conditions. Future income tax expenses are computed by applying the appropriate year-end statutory tax rates to the future pretax net cash flows relating to proved oil, NGLs and natural gas reserves less the tax basis of our properties. The future income tax expenses also give effect to permanent differences and tax credits and allowances relating to our proved oil, NGLs and natural gas reserves. Care should be exercised in the use and interpretation of the above data. As production occurs over the next several years, the results shown may be significantly different as changes in production performance, petroleum prices and costs are likely to occur. |
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- Definition
The entire disclosure for oil and gas producing industries. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Schedule II - Valuation And Qualifying Accounts And Reserves
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Dec. 31, 2011
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| Valuation And Qualifying Accounts And Reserves [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valuation And Qualifying Accounts And Reserves | Schedule II UNIT CORPORATION AND SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS AND RESERVES Allowance for Doubtful Accounts:
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The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary Of Significant Accounting Policies (Policy)
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Dec. 31, 2011
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| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Principles Of Consolidation | Principles of Consolidation. The consolidated financial statements include the accounts of Unit Corporation and its subsidiaries. Our investment in limited partnerships is accounted for on the proportionate consolidation method, whereby our share of the partnerships' assets, liabilities, revenues and expenses are included in the appropriate classification in the accompanying consolidated financial statements. Certain amounts in the accompanying consolidated financial statements for prior periods have been reclassified to conform to current year presentation. |
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| Accounting Estimates | Accounting Estimates. The preparation of financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. |
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| Drilling Contracts | Drilling Contracts. We recognize revenues and expenses generated from "daywork" drilling contracts as the services are performed, since we do not bear the risk of completion of the well. Under "footage" and "turnkey" contracts, we bear the risk of completion of the well; therefore, revenues and expenses are recognized when the well is substantially completed. Under this method, substantial completion is determined when the well bore reaches the negotiated depth as stated in the contract. The entire amount of a loss, if any, is recorded when the loss is deter-minable. The costs of uncompleted drilling contracts include expenses incurred to date on "footage" or "turnkey" contracts, which are still in process at the end of the period, and are included in other current assets. Typically, any one of these three types of contracts can be used for the drilling of one well which can take from 20 to 90 days. At December 31, 2011, substantially all of our contracts were daywork contracts of which 62 were multi-well and had durations which ranged from six months to three years. These longer term contracts may contain a fixed rate for the duration of the contract or provide for the periodic renegotiation of the rate within a specific range from the existing rate. |
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| Cash Equivalents And Book Overdrafts | Cash Equivalents and Book Overdrafts. We include as cash equivalents all investments with maturities at date of purchase of three months or less which are readily convertible into known amounts of cash. Book overdrafts are checks that have been issued before the end of the period, but not presented to our bank for payment before the end of the period. At December 31, 2011 and 2010, book overdrafts were $26.5 million and $13.1 million, respectively, and included in accounts payable. |
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| Accounts Receivable | Accounts Receivable. Accounts receivable are carried on a gross basis, with no discounting, less an allowance for doubtful accounts. We estimate the allowance for doubtful accounts based on existing economic conditions, the financial condition of our customers, and the amount and age of past due accounts. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been unsuccessful. |
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| Financial Instruments And Concentrations Of Credit Risk And Non-Performance Risk | Financial Instruments and Concentrations of Credit Risk and Non-performance Risk. Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of trade receivables with a variety of oil and natural gas companies. We do not generally require collateral related to receivables. Our credit risk is considered to be limited due to the large number of customers comprising our customer base. Below are the third-party customers that accounted for more than 10% of our segment's revenues:
We had a concentration of cash of $31.1 million and $23.8 million at December 31, 2011 and 2010, respectively with one bank.
The use of derivative transactions also involves the risk that the counterparties will be unable to meet the financial terms of the transactions. We considered this non-performance risk with regard to our counterparties and our own non-performance risk in our derivative valuation at December 31, 2011 and determined there was no material risk at that time. At December 31, 2011, the fair values of the net assets (liabilities) we had with each of the counterparties with respect to all of our commodity derivative transactions are listed in the table below:
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| Property And Equipment | Property and Equipment. Drilling equipment, natural gas gathering and processing equipment, transportation equipment and other property and equipment are carried at cost. Renewals and improvements are capitalized while repairs and maintenance are expensed. Depreciation of drilling equipment is recorded using the units-of-production method based on estimated useful lives starting at 15 years, including a minimum provision of 20% of the active rate when the equipment is idle. We use the composite method of depreciation for drill pipe and collars and calculate the depreciation by footage actually drilled compared to total estimated remaining footage. Depreciation of other property and equipment is computed using the straight-line method over the estimated useful lives of the assets ranging from 3 to 15 years. Realization of the carrying value of property and equipment is reviewed for possible impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Assets are determined to be impaired if a forecast of undiscounted estimated future net operating cash flows directly related to the asset including disposal value if any, is less than the carrying amount of the asset. If any asset is determined to be impaired, the loss is measured as the amount by which the carrying amount of the asset exceeds its fair value. An estimate of fair value is based on the best information available, including prices for similar assets. Changes in such estimates could cause us to reduce the carrying value of property and equipment. No significant impairments were recorded at December 31, 2011, 2010 or 2009. When property and equipment components are disposed of, the cost and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is generally reflected in operations. For dispositions of drill pipe and drill collars, an average cost for the appropriate feet of drill pipe and drill collars is removed from the asset account and charged to accumulated depreciation and proceeds, if any, are credited to accumulated depreciation. We record an asset and a liability equal to the present value of the expected future asset retirement obligation (ARO) associated with our oil and gas properties. The ARO asset is depreciated in a manner consistent with the depreciation of the underlying physical asset. We measure changes in the liability due to passage of time by accreting an interest charge. This amount is recognized as an increase in the carrying amount of the liability and as a corresponding accretion expense. |
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| Goodwill | Goodwill. Goodwill represents the excess of the cost of acquisitions over the fair value of the net assets acquired. Goodwill is not amortized, but an impairment test is performed at least annually to determine whether the fair value has decreased and is performed additionally when events indicate an impairment may have occurred. Goodwill is all related to our contract drilling segment, and accordingly, the impairment test is generally based on the estimated discounted future net cash flows of our drilling segment, utilizing discount rates and other factors in determining the fair value of our drilling segment. No goodwill impairment was recorded for the years ended December 31, 2011, 2010, or 2009. There were no additions to goodwill in 2011, 2010 or 2009. Goodwill of $5.7 million is deductible for tax purposes. |
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| Intangible Assets | Intangible Assets. Intangible assets are capitalized and amortized over the estimated period benefited. Such amounts are reviewed for possible impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. No intangible asset impairment was recorded for the years ended December 31, 2011, 2010 or 2009. Amortization of $1.2 million, $2.6 million and $3.7 million was recorded in 2011, 2010 and 2009, respectively. Accumulated amortization for 2011 and 2010 was $16.1 million and $14.9 million, respectively. Amortization of $1.2 million and $0.7 million is expected to be recorded in 2012 and 2013, respectively. |
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| Oil And Natural Gas Operations | Oil and Natural Gas Operations. We account for our oil and natural gas exploration and development activities using the full cost method of accounting prescribed by the SEC. Accordingly, all productive and non-productive costs incurred in connection with the acquisition, exploration and development of our oil and natural gas reserves, including directly related overhead costs and related asset retirement costs, are capitalized and amortized on a units-of-production method based on proved oil and natural gas reserves. Directly related overhead costs of $15.6 million, $13.4 million and $13.2 million were capitalized in 2011, 2010 and 2009, respectively. Independent petroleum engineers annually audit our internal evaluation of our reserves. The average rates used for depreciation, depletion and amortization (DD&A) were $15.06, $11.94 and $11.22 per Boe in 2011, 2010 and 2009, respectively. The calculation of DD&A includes estimated future expenditures to be incurred in developing proved reserves and estimated dismantlement and abandonment costs, net of estimated salvage values. Our undeveloped leasehold properties totaling $185.6 million are excluded from the DD&A calculation. No gains or losses are recognized on the sale, conveyance or other disposition of oil and natural gas properties unless a significant reserve amount is involved. Revenue from the sale of oil and natural gas is recognized when title passes, net of royalties. Under the full cost rules, at the end of each quarter, we review the carrying value of our oil and natural gas properties. The full cost ceiling is based principally on the estimated future discounted net cash flows from our oil and natural gas properties discounted at 10%. Starting December 31, 2009, companies like us that use full cost accounting moved from using the commodity prices existing on the last day of the period to that of the unweighted arithmetic average of the commodity prices existing on the first day of each of the 12 months before the end of the reporting period to calculate discounted future revenues, unless prices were otherwise determined under contractual arrangements. In the event the unamortized cost of oil and natural gas properties being amortized exceeds the full cost ceiling, as defined by the SEC, the excess is charged to expense in the period during which such excess occurs, even if prices are depressed for only a short period of time. Once incurred, a write-down of oil and natural gas properties is not reversible. We recorded a non-cash ceiling test write-down of $281.2 million pre-tax ($175.1 million, net of tax) during the quarter ending March 31, 2009. This write-down resulted from the reduction in commodity prices existing at the end of the first quarter of 2009 as compared to at the end of 2008. Derivative instruments qualifying as cash flow hedges were included in determining the limitation on the capitalized costs in our March 31, 2009 ceiling test calculation. The effect of including those hedges was a $197.9 million pre-tax increase in the discounted net cash flow of our oil and natural gas properties. Our qualifying cash flow hedges as of March 31, 2009, which consisted of swaps and collars, covered 2009 production of 30.3 Bcfe and 2010 production of 33.2 Bcfe. At December 31, 2010 and December 31, 2011, using the existing 12-month average commodity prices, including the discounted value of our commodity hedges, we were not required to record a ceiling test write-down. However, if there are declines in the 12-month average prices, including the discounted value of our commodity hedges, we may be required to record a write-down in future periods. Our qualifying cash flow hedges used in the ceiling test determination at December 31, 2011, consisted of swaps covering 5.0 MMBoe in 2012 and 0.7 MMBoe in 2013. The effect of those hedges on the December 31, 2011 ceiling test was a $22.1 million pre-tax increase in the discounted net cash flows of our oil and natural gas properties. Even without the impact of those hedges, we would not have been required to take a write-down for the quarter. Our oil and natural gas hedging is discussed in Note 13 of the Notes to our Consolidated Financial Statements. Our contract drilling segment provides drilling services for our exploration and production segment. Depending on their timing some of the drilling services performed on our properties are also deemed to be associated with the acquisition of an ownership interest in the property. Revenues and expenses for such services are eliminated in our income statement, with any profit recognized as a reduction in our investment in our oil and natural gas properties. The contracts for these services are issued under the same conditions and rates as the contracts entered into with unrelated third parties. We eliminated revenue of $52.2 million, $40.1 million and $15.0 million for 2011, 2010 and 2009, respectively from our contract drilling segment and eliminated the associated operating expense of $32.6 million, $31.0 million and $13.7 million during 2011, 2010 and 2009, respectively, yielding $19.6 million, $9.1 million and $1.3 million during 2011, 2010 and 2009, respectively, as a reduction to the carrying value of our oil and natural gas properties. |
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| Gas Gathering And Processing Revenue | Gas Gathering and Processing Revenue. Our gathering and processing segment recognizes revenue from the gathering and processing of natural gas and NGLs in the period the service is provided based on contractual terms. |
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| Insurance | Insurance. We are self-insured for certain losses relating to workers' compensation, control of well and employee medical benefits. Insured policies for other coverage contain deductibles or retentions per occurrence that range from $50,000 to $1.5 million. We have purchased stop-loss coverage in order to limit, to the extent feasible, per occurrence and aggregate exposure to certain types of claims. However, there is no assurance that the insurance coverage will adequately protect us against liability from all potential consequences. We have elected to use an ERISA governed occupational injury benefit plan to cover all Texas drilling operations in lieu of covering them under Texas Workers' Compensation. If insurance coverage becomes more expensive, we may choose to self-insure, decrease our limits, raise our deductibles or any combination of these rather than pay higher premiums. |
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| Hedging Activities | Hedging Activities. All derivatives are recognized on the balance sheet and measured at fair value. If a derivative is designated as a cash flow hedge, we measure the effectiveness of the hedge, or the degree that the gain (loss) for the hedging instrument offsets the loss (gain) on the hedged item, at each reporting period. The effective portion of the gain (loss) on the derivative instrument is recognized in other comprehensive income as a component of equity and subsequently reclassified into earnings when the forecasted transaction affects earnings. The ineffective portion of a derivative's change in fair value is required to be recognized in earnings immediately. Derivatives that do not qualify for hedge treatment are recorded at fair value with gains (losses) recognized in earnings in the period of change.
We document our risk management strategy and hedge effectiveness at the inception of and during the term of each hedge. |
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| Limited Partnerships | Limited Partnerships. Unit Petroleum Company is a general partner in 16 oil and natural gas limited partnerships sold privately and publicly. Some of our officers, directors and employees own the interests in most of these partnerships. We share in each partnership's revenues and costs in accordance with formulas set out in each of the limited partnership agreement. The partnerships also reimburse us for certain administrative costs incurred on behalf of the partnerships. |
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| Income Taxes | Income Taxes. Measurement of current and deferred income tax liabilities and assets is based on provisions of enacted tax law; the effects of future changes in tax laws or rates are not included in the measurement. Valuation allowances are established where necessary to reduce deferred tax assets to the amount expected to be realized. Income tax expense is the tax payable for the year and the change during that year in deferred tax assets and liabilities. The accounting for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a return. Guidance is also provided on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. We have no unrecognized tax benefits and we do not expect any significant changes in unrecognized tax benefits in the next twelve months. |
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| Natural Gas Balancing | Natural Gas Balancing. We use the sales method for recording natural gas sales. This method allows for recognition of revenue, which may be more or less than its share of pro-rata production from certain wells. We estimate our December 31, 2011 balancing position to be approximately 3.4 Bcf on under-produced properties and approximately 3.3 Bcf on over-produced properties. We have recorded a receivable of $1.5 million on certain wells where we estimate that insufficient reserves are available for us to recover the under-production from future production volumes. We have also recorded a liability of $3.3 million on certain properties where we believe there are insufficient reserves available to allow the under-produced owners to recover their under-production from future production volumes. Our policy is to expense the pro-rata share of lease operating costs from all wells as incurred. Such expenses relating to the balancing position on wells in which we have imbalances are not material. |
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| Employee And Director Stock Based Compensation | Employee and Director Stock Based Compensation. We recognize in our financial statements the cost of employee services received in exchange for awards of equity instruments based on the grant date fair value of those awards. The amount of our equity compensation cost relating to employees directly involved in our oil and natural gas segment is capitalized to our oil and natural gas properties. Amounts not capitalized to our oil and natural gas properties are recognized in general and administrative expense and operating costs of our business segments. We utilize the Black-Scholes option pricing model to measure the fair value of stock options and stock appreciation rights (SARs). The value of our restricted stock grants is based on the closing stock price on the date of the grants. |
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Drilling Contracts [Policy Text Block]. No definition available.
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Limited Partnerships No definition available.
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Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for its derivative instruments and hedging activities. Disclosure may include: (1) Each method used to account for derivative financial instruments and derivative commodity instruments ("derivatives"); (2) the types of derivatives accounted for under each method; (3) the criteria required to be met for each accounting method used, including a discussion of the criteria required to be met for hedge or deferral accounting and accrual or settlement accounting (for example, whether and how risk reduction, correlation, designation, and effectiveness tests are applied); (4) the accounting method used if the criteria specified for hedge accounting are not met; (5) the method used to account for termination of derivatives designated as hedges or derivatives used to affect directly or indirectly the terms, fair values, or cash flows of a designated item; (6) the method used to account for derivatives when the designated item matures, is sold, is extinguished, or is terminated. In addition, the method used to account for derivatives designated to an anticipated transaction, when the anticipated transaction is no longer likely to occur; and (7) where and when derivatives, and their related gains or losses are reported in the statement of financial position, cash flows, and results of operations and (8) an accounting policy decision to offset fair value amounts with counterparties. An entity may also describe its embedded derivatives, and the method(s) used to determine the fair values of derivatives and any significant assumptions used in such valuations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for gas balancing arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for goodwill. This accounting policy also may address how an entity assesses and measures impairment of goodwill, how reporting units are determined, how goodwill is allocated to such units, and how the fair values of the reporting units are determined. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for intangible assets. This accounting policy may address both intangible assets subject to amortization and those that are not. The following also may be disclosed: (1) a description of intangible assets (2) the estimated useful lives of those assets (3) the amortization method used (4) how the entity assesses and measures impairment of such assets (5) how future cash flows are estimated (6) how the fair values of such asset are determined. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for oil and gas entities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for property, plant and equipment which may include the basis of such assets, depreciation methods used and estimated useful lives, the entity's capitalization policy, including its accounting treatment for costs incurred for repairs and maintenance activities, whether such asset balances include capitalized interest and the method by which such is calculated, how disposals of such assets are accounted for and how impairment of such assets is assessed and recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for trade and other accounts receivable, and finance, loan and lease receivables, including those classified as held for investment and held for sale. This disclosure may include (1) the basis at which such receivables are carried in the entity's statements of financial position (2) how the level of the valuation allowance for receivables is determined (3) when impairments, charge-offs or recoveries are recognized for such receivables (4) the treatment of origination fees and costs, including the amortization method for net deferred fees or costs (5) the treatment of any premiums or discounts or unearned income (6) the entity's income recognition policies for such receivables, including those that are impaired, past due or placed on nonaccrual status and (7) the treatment of foreclosures or repossessions (8) the nature and amount of any guarantees to repurchase receivables. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for director stock option and stock incentive plans. This disclosure may include (1) the types of director stock option or incentive plans sponsored by the entity (2) significant plan provisions and (3) how stock compensation is measured, and the methodologies and significant assumptions used to determine that measurement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary Of Significant Accounting Policies (Tables)
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Dec. 31, 2011
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| Schedule Of Segment's Revenues |
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| Schedule Of Fair Values Of The Net Assets (Liabilities) |
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Schedule Of Derivative Positions With Counterparty [Table Text Block] No definition available.
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Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Earnings (Loss) Per Share (Tables)
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| Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share |
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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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Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Accrued Liabilities (Tables)
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Dec. 31, 2011
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Tabular disclosure of the (a) 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 (accounts payable); (b) other payables; and (c) accrued liabilities. 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). An alternative caption includes accrued expenses. No definition available.
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Long-Term Debt And Other Long-Term Liabilities (Tables)
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Dec. 31, 2011
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| Long-Term Debt And Other Long-Term Liabilities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-Term Debt |
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| Other Long-Term Liabilities |
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- Definition
Schedule Of Other Liabilities [Table Text Block] No definition available.
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- Details
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- 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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Asset Retirement Obligations (Tables)
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Dec. 31, 2011
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| Asset Retirement Obligations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Asset Retirement Obligations |
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- Details
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- 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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Income Taxes (Tables)
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Dec. 31, 2011
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| Income Taxes [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Reconciliation Of Income Tax Expense (Benefit) |
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| Schedule Of Total Provision For Income Taxes |
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| Schedule Of Deferred Tax Assets And Liabilities |
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- Details
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- Definition
Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Transactions With Related Parties (Tables)
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Dec. 31, 2011
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| Transactions With Related Parties [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Amount Received In Public And Private Partnerships |
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- Definition
Schedule Of Amount Received In Public And Private Partnerships [Table Text Block] No definition available.
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- Details
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Stock-Based Compensation (Tables)
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Dec. 31, 2011
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Restricted Stock Awards Stock Options And SAR |
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| Estimated Fair Value Of The Stock Options Granted |
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| Shares Authorized Under Stock Option Plans By Exercise Price Range |
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Stock Options Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Activity Pertaining To SAR, Stock Option Plan And Directors Plan |
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Stock Appreciation Rights (SARs) [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Activity Pertaining To SAR, Stock Option Plan And Directors Plan |
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Directors Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Activity Pertaining To SAR, Stock Option Plan And Directors Plan |
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Restricted Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Activity Pertaining To Restricted Stock Awards |
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- Definition
Schedule Of Share Based Compensation Restricted Stock Awards Stock Options And Stock Appreciation Rights [Table Text Block] No definition available.
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- Definition
Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of the changes in outstanding nonvested restricted stock units. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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Derivatives (Tables)
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Dec. 31, 2011
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| Derivatives [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash Flow Hedges Outstanding |
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| Schedule Of Subsequent Cash Flow Hedges |
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| Fair Value Of Derivative Instruments And Locations In Balance Sheets |
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| Amount Of Gain Or (Loss) Recognized In Accumulated OCI On Derivative |
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| Gain Or Loss Of Reclassified Accumulated Other Comprehensive Income And Recognized Income |
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| Effect Of Derivative Instruments Recognized In Statement Of Operations, Not Designated As Hedging Instruments |
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- Definition
Schedule Of Cash Flow Hedges Outstanding [Table Text Block] No definition available.
|
| X | ||||||||||
|
- Definition
Schedule Of Gain or Loss Of Reclassified Accumulated Other Comprehensive Income And Recognized Income [Table Text Block] No definition available.
|
| X | ||||||||||
|
- Definition
Schedule Of Subsequent Cash Flow Hedges [Table Text Block] No definition available.
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the effective portion of gains and losses on derivative instruments (and nonderivative instruments) designated and qualifying in cash flow hedges recorded in accumulated other comprehensive income (loss) during the term of the hedging relationship and reclassified into earnings during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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 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
|
|
Fair Value Measurements (Tables)
|
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2011
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| Fair Value Measurements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Recurring Fair Value Measurements |
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| Reconciliations Of Level 3 Fair Value Measurements |
|
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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, 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, issuances, 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
|
| X | ||||||||||
|
- Details
|
| 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
|
|
Industry Segment Information (Tables)
|
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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|
Dec. 31, 2011
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| Industry Segment Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue From Different Segments |
|
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| X | ||||||||||
|
- Definition
Tabular disclosure of all significant reconciling items in the reconciliation of total revenues from reportable segments to the entity's consolidated revenues. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Selected Quarterly Financial Information (Tables)
|
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2011
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| Selected Quarterly Financial Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Quarterly Financial Information |
|
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| X | ||||||||||
|
- Definition
Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Supplemental Oil And Gas Disclosures (Tables)
|
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
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| Supplemental Oil And Gas Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Capitalized Costs And Costs Incurred On Oil And Gas Properties |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of The Oil And Natural Gas Property Costs Not Being Amortized |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Results Of Operations For Producing Activities |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Proved Developed And Undeveloped Oil And Gas Reserve Quantities |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Standardized Measure Of Discounted Future Cash Flows Relating To Proved Reserves Disclosure |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Principal Sources Of Changes In Standardized Measure Of Discounted Future Net Cash Flows |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
|
- Definition
Schedule Of Principal Sources Of Changes In Standardized Measure Of Discounted Future Net Cash Flows [Table Text Block] No definition available.
|
| X | ||||||||||
|
- Definition
Tabular disclosure of aggregate capitalized costs relating to an enterprise's oil and gas producing activities and the aggregate related accumulated depreciation, depletion, amortization, and valuation allowances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the results of operations for oil and gas producing activities for the year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the capitalized costs of unproved properties and major development projects that are excluded from capitalized costs being amortized. This includes the total costs excluded and, at a minimum, these categories of costs: acquisition costs, exploration costs, development costs in the case of significant development projects, and capitalized interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the net quantities of an enterprise's interests in proved developed and undeveloped reserves of (a) crude oil (including condensate and natural gas liquids), (b) natural gas (including coal bed methane), (c) synthetic oil, (d) synthetic gas, and (e) other nonrenewable natural resources that are intended to be upgraded during the period as of the beginning of the period, changes in quantities during the period, and as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchase under long-term agreements in which the enterprise participates in the operation of the properties on which the oil and gas is located or otherwise serves as the producer. This information is presented in aggregate and for each geographic area for which reserve quantities are disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
|
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Mar. 31, 2009
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Number of daywork contracts | 62 | |||
| Book overdrafts | $ 26,500,000 | $ 13,100,000 | ||
| Concentration of cash | 31,100,000 | 23,800,000 | ||
| Minimum depreciation percentage for drilling rigs | 20.00% | |||
| Goodwill impairment | 0 | 0 | 0 | |
| Additions to goodwill | 0 | 0 | 0 | |
| Goodwill deductible for tax purposes | 5,700,000 | |||
| Intangible asset impairment | 0 | 0 | 0 | |
| Amortization | 1,200,000 | 2,600,000 | 3,700,000 | |
| Accumulated amortization | 16,100,000 | 14,900,000 | ||
| Amortization to be recorded in 2012 | 1,200,000 | |||
| Amortization to be recorded in 2013 | 700,000 | |||
| Directly related overhead costs capitalized | 15,600,000 | 13,400,000 | 13,200,000 | |
| Average rates used for depreciation, depletion and amortization per Boe | 15.06 | 11.94 | 11.22 | |
| Undeveloped leasehold properties excluded from DD&A calculation | 185,632,000 | |||
| Future discounted net cash flows discounted | 10.00% | |||
| Non-cash ceiling test write-down | 281,200,000 | |||
| Non-cash ceiling test write-down net of tax | 175,100,000 | |||
| Effects of cash flow hedges | 197,900,000 | 22,100,000 | ||
| Elimination of inter-segment revenue | 52,221,000 | 40,143,000 | 15,049,000 | |
| Eliminated associated operating expense | 32,600,000 | 31,000,000 | 13,700,000 | |
| Eliminated yielding | 19,600,000 | 9,100,000 | 1,300,000 | |
| Number of partnerships | 16 | |||
| More-likely-than-not threshold | 50.00% | |||
|
Minimum [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Number of days for drilling of one well | 20 | |||
| Duration length of contracts | 6 | |||
| Insurance coverage | 50,000 | |||
|
Maximum [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Number of days for drilling of one well | 90 | |||
| Duration length of contracts | 3 | |||
| Insurance coverage | 1,500,000 | |||
|
Under-Produced Properties [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Natural gas balancing | 3,400,000,000 | |||
|
Over-Produced Properties [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Natural gas balancing | 3,300,000,000 | |||
|
Natural Gas Balancing [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Accounts receivable | 1,500,000 | |||
| Liability recognized to under production | $ 3,300,000 | |||
|
Jan'12 - Dec'12 [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Oil and gas production volume covered by hedges that affect ceiling determination, Bcfe/MMBoe | 5.0 | |||
|
Jan'13 - Dec'13 [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Oil and gas production volume covered by hedges that affect ceiling determination, Bcfe/MMBoe | 0.7 | |||
|
Jan'09 - Dec'09 [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Oil and gas production volume covered by hedges that affect ceiling determination, Bcfe/MMBoe | 30.3 | |||
|
Jan'10 - Dec'10 [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Oil and gas production volume covered by hedges that affect ceiling determination, Bcfe/MMBoe | 33.2 | |||
|
Drilling Equipment [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Useful lives maximum, years | 15 | |||
|
Property, Plant and Equipment, Other Types [Member]
|
||||
| Summary Of Significant Accounting Policies [Line Items] | ||||
| Useful lives minimum, years | 3 | |||
| Useful lives maximum, years | 15 | |||
| X | ||||||||||
|
- Definition
Book Overdrafts No definition available.
|
| X | ||||||||||
|
- Definition
Contract Duration No definition available.
|
| X | ||||||||||
|
- Definition
The pre-tax discounted value of cash flow hedges included in the ceiling test calculation. No definition available.
|
| X | ||||||||||
|
- Definition
Eliminated associated operating expense No definition available.
|
| X | ||||||||||
|
- Definition
Eliminated yielding No definition available.
|
| X | ||||||||||
|
- Definition
Elimination Of Inter Segment Revenue Of Contract Drilling No definition available.
|
| X | ||||||||||
|
- Definition
Goodwill and Other, More Likely Than Not Threshold No definition available.
|
| X | ||||||||||
|
- Definition
Minimum depreciation percentage for drilling rigs No definition available.
|
| X | ||||||||||
|
- Definition
Non-cash ceiling test write-down No definition available.
|
| X | ||||||||||
|
- Definition
Non-Cash Ceiling Test Write-Down Net Of Tax No definition available.
|
| X | ||||||||||
|
- Definition
Number of Contracts, Daywork No definition available.
|
| X | ||||||||||
|
- Definition
Number of Days for Drilling of Wells No definition available.
|
| X | ||||||||||
|
- Definition
Number of Partnerships No definition available.
|
| X | ||||||||||
|
- Definition
Oil and gas properties average depreciation depletion and amortization rate No definition available.
|
| X | ||||||||||
|
- Definition
Oil and Gas Property, Full Cost Method, Discount Percentage No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their 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
|
| X | ||||||||||
|
- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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 which include those incurred to (1) to drill and equip those exploratory wells and exploratory-type stratigraphic test wells that have found proved reserves and (2) obtain access to proved reserves and provide facilities for extracting, treating, gathering, storing the oil and gas, including the drilling and equipping of development wells and development-type stratigraphic wells and service wells. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Carrying value as of the balance sheet date of obligations incurred and payable to an underproduced working interest owner when an overproduced working interest owner has sold gas in excess of the party's ownership percentage. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the gas imbalance in terms of units of measure (Mcf) as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The quantity of future oil and gas production being hedged. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. No definition available.
|
| X | ||||||||||
|
- Definition
The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. No definition available.
|
| X | ||||||||||
|
- Definition
Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Summary Of Significant Accounting Policies (Schedule Of Segment's Revenues) (Details)
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|---|---|---|---|
|
QEP Resources, Inc.[Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 22.00% | 28.00% | 35.00% |
|
Valero Energy Corporation [Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 18.00% | 7.00% | 5.00% |
|
Sunoco Partners Marketing [Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 10.00% | 8.00% | 7.00% |
|
ONEOK [Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 54.00% | 53.00% | 52.00% |
|
Gavilon LLC [Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 19.00% | 12.00% | 0.00% |
|
ConocoPhillips [Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 7.00% | 12.00% | 15.00% |
|
Tenaska [Member]
|
|||
| Revenue, Major Customer [Line Items] | |||
| Segment's revenues | 1.00% | 7.00% | 17.00% |
| X | ||||||||||
|
- Definition
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Summary Of Significant Accounting Policies (Schedule Of Fair Values Of The Net Assets (Liabilities)) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
|---|---|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | $ 33,800 |
|
Bank Of Montreal [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 18,700 |
|
Bank Of America, N.A. [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 6,500 |
|
BNP Paribas [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 6,100 |
|
Comerica Bank [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 1,400 |
|
BBVA Compass Bank [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 1,000 |
|
BP Corporation [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 200 |
|
Credit Agricole Corporate And Investment Bank, London Branch [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | 100 |
|
Macquarie Bank [Member]
|
|
| Derivative Counter-Party [Line Items] | |
| Total assets (liabilities) | $ (200) |
| X | ||||||||||
|
- Details
|
| 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
|
|
Acquisitions (Details) (USD $)
In Millions, unless otherwise specified |
1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2010
|
Jun. 02, 2010
A
Boe
|
Dec. 31, 2011
Oil [Member]
bbl
|
Dec. 31, 2010
Oil [Member]
bbl
|
Dec. 31, 2009
Oil [Member]
bbl
|
Jun. 02, 2010
Oil [Member]
bbl
|
Dec. 31, 2008
Oil [Member]
bbl
|
Dec. 31, 2011
Natural Gas Liquids [Member]
bbl
|
Dec. 31, 2010
Natural Gas Liquids [Member]
bbl
|
Dec. 31, 2009
Natural Gas Liquids [Member]
bbl
|
Jun. 02, 2010
Natural Gas Liquids [Member]
|
Dec. 31, 2008
Natural Gas Liquids [Member]
bbl
|
Jun. 02, 2010
Natural Gas Reserves [Member]
MMcf
|
Dec. 31, 2011
Natural Gas [Member]
Mcf
|
Dec. 31, 2010
Natural Gas [Member]
Mcf
|
Dec. 31, 2009
Natural Gas [Member]
Mcf
|
Dec. 31, 2008
Natural Gas [Member]
Mcf
|
Jun. 30, 2010
Southwest Oklahoma And North Texas [Member]
|
Jul. 20, 2011
Oklahoma And Lipscomb [Member]
|
Jul. 20, 2011
Oklahoma And Lipscomb [Member]
Natural Gas Reserves [Member]
|
Aug. 31, 2011
Oklahoma Arkoma Woodford And Hartshorne Coal [Member]
A
|
Aug. 31, 2011
Oklahoma Arkoma Woodford And Hartshorne Coal [Member]
Natural Gas [Member]
|
Dec. 31, 2011
South Central Kansas [Member]
|
|
| Business Acquisition [Line Items] | |||||||||||||||||||||||
| Payments to acquire oil and gas property | $ 73.7 | $ 17.6 | $ 12.3 | $ 30.5 | |||||||||||||||||||
| Purchase price allocation for proved properties | 48.7 | 8.4 | |||||||||||||||||||||
| Undeveloped leasehold | $ 25.0 | $ 3.9 | $ 17.3 | ||||||||||||||||||||
| Gas and oil acreage, developed and undeveloped, net | 45,000 | 55,000 | |||||||||||||||||||||
| Operating number of wells | 10 | ||||||||||||||||||||||
| Acquired operated wells | 30 | ||||||||||||||||||||||
| Acquired non-operated wells | 59 | ||||||||||||||||||||||
| Operating and non-operating number of wells | 500 | ||||||||||||||||||||||
| Proved developed reserves (BOE) | 762,000 | ||||||||||||||||||||||
| Proved developed reserves (volume) | 15,618,000 | 12,773,000 | 9,183,000 | 511,000 | 7,508,000 | 16,649,000 | 12,088,000 | 11,538,000 | 8,638,000 | 573 | 372,311,000 | 346,928,000 | 338,217,000 | 355,824,000 | |||||||||
| Proved developed reserves (volume) per day, MMcfe | 1.7 | ||||||||||||||||||||||
| Proved developed reserves of NGL, barrels | 155,000 | ||||||||||||||||||||||
| Proved developed reserves acquired | 6,600,000,000 | ||||||||||||||||||||||
| Preliminary proved reserves, cubic feet | (2,511,000) | (1,521,000) | (1,286,000) | (2,239,000) | (1,549,000) | (1,488,000) | (44,104,000) | (40,756,000) | (44,063,000) | 31,200,000,000 | |||||||||||||
| Percentage of proved developed reserves | 83.00% | ||||||||||||||||||||||
| Net undeveloped acres | 32,000 | 60,000 | |||||||||||||||||||||
| Acres acquired held by production | 12,000 | ||||||||||||||||||||||
| Percentage of acre held for production | 96.00% | ||||||||||||||||||||||
| X | ||||||||||
|
- Definition
Acquired non operated wells No definition available.
|
| X | ||||||||||
|
- Definition
Acquired operated wells No definition available.
|
| X | ||||||||||
|
- Definition
Acres acquired held by production No definition available.
|
| X | ||||||||||
|
- Definition
Net Leasehold Acres (Developed and Undeveloped) No definition available.
|
| X | ||||||||||
|
- Definition
Percentage of acre held for production No definition available.
|
| X | ||||||||||
|
- Definition
Percentage of proved developed reserves No definition available.
|
| X | ||||||||||
|
- Definition
Productive wells number of wells acquired gross No definition available.
|
| X | ||||||||||
|
- Definition
Proved developed reserves acquired No definition available.
|
| X | ||||||||||
|
- Definition
Proved Developed Reserves of NGL, Barrels No definition available.
|
| X | ||||||||||
|
- Definition
Proved developed reserves (volume) per day No definition available.
|
| X | ||||||||||
|
- Definition
Amount of the purchase price allocated to proved oil and gas properties acquired. No definition available.
|
| X | ||||||||||
|
- Definition
The purchase price allocated to undeveloped oil and gas leasehold acquired. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Undeveloped acreage is considered to be those lease acres on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas regardless of whether or not such acreage contains proved reserves. Net acres is the sum of the fractional interest owned based on working interests or other economic arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The total number of producing oil wells and oil wells capable of production, in which the entity owns an undivided working interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Production of proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities do not include reserves relating to interests of others in properties owned by the enterprise. Measured in barrel of oil equivalent (BOE). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Earnings (Loss) Per Share (Earnings (Loss) Per Share) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2010
|
Sep. 30, 2010
|
Jun. 30, 2010
|
Mar. 31, 2010
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
||||
| Earnings (Loss) Per Share [Abstract] | ||||||||||||||
| Net income (loss) | $ 51,661 | $ 53,360 | $ 49,819 | $ 41,027 | $ 43,665 | $ 34,491 | $ 32,175 | $ 36,153 | $ 195,867 | $ 146,484 | $ (55,500) | |||
| Income/(loss) of effect of dilutive stock options, restricted stock and stock appreciation rights SARs | 0 | 0 | 0 | |||||||||||
| Income/(loss) of diluted earnings per common share | $ 195,867 | $ 146,484 | $ (55,500) | |||||||||||
| Weighted shares of basic earnings per common share | 47,658,000 | 47,278,000 | 46,990,000 | |||||||||||
| Weighted shares of effect of dilutive stock options, restricted stock and stock appreciation rights SARs | 293,000 | 176,000 | 0 | |||||||||||
| Weighted shares of diluted earnings per common share | 47,951,000 | 47,454,000 | 46,990,000 | |||||||||||
| Per-share amount of basic earnings (loss) per common share | $ 1.08 | $ 1.12 | $ 1.05 | $ 0.86 | $ 0.92 | $ 0.73 | $ 0.68 | $ 0.77 | $ 4.11 | $ 3.10 | $ (1.18) | |||
| Per-share amount of effect of dilutive stock options, restricted stock and stock appreciation rights SARs | $ (0.03) | $ (0.01) | $ 0.00 | |||||||||||
| Per-share amount of diluted earnings (loss) per common share | $ 1.08 | [1] | $ 1.11 | $ 1.04 | $ 0.86 | $ 0.92 | $ 0.73 | $ 0.68 | $ 0.76 | $ 4.08 | $ 3.09 | $ (1.18) | ||
| Weighted average shares related to stock options, restricted stock and SARs | 373,000 | |||||||||||||
|
||||||||||||||
| X | ||||||||||
|
- Definition
Change in net income dilutive No definition available.
|
| X | ||||||||||
|
- Definition
Incremental Per Share Effect Of Dilutive Income Changes Over Dilutive Share Changes No definition available.
|
| 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
|
| X | ||||||||||
|
- Details
|
| 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
|
| 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
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
Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
| 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
|
| 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
|
|
Earnings (Loss) Per Share (Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Options and SARs | 373,000 | ||
|
Derivative [Member]
|
|||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Options and SARs | 105,000 | 222,901 | 358,821 |
| Average exercise price | $ 61.24 | $ 52.59 | $ 47.83 |
| 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.
|
| 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
|
| X | ||||||||||
|
- Details
|
|
Accrued Liabilities (Accrued Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Accrued Liabilities [Abstract] | ||
| Employee costs | $ 22,518 | $ 16,499 |
| Taxes | 13,480 | 1,310 |
| Lease operating expenses | 7,346 | 6,214 |
| Interest payable | 2,647 | 667 |
| Hedge settlements | 1,844 | 1,634 |
| Other | 3,898 | 3,769 |
| Total accrued liabilities | $ 51,733 | $ 30,093 |
| X | ||||||||||
|
- Definition
Accrued Hedge Settlements No definition available.
|
| X | ||||||||||
|
- Definition
Accrued Oil And Gas Production Expense Current No definition available.
|
| X | ||||||||||
|
- Details
|
| 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
|
| 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
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
|
| X | ||||||||||
|
- Definition
Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. 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
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. 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
|
|
Long-Term Debt And Other Long-Term Liabilities (Narrative) (Details) (USD $)
|
0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 13, 2011
|
May 18, 2011
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Sep. 13, 2011
Minimum [Member]
|
Dec. 31, 2011
Minimum [Member]
|
Sep. 13, 2011
Maximum [Member]
|
Dec. 31, 2011
Maximum [Member]
|
Dec. 31, 2011
Senior Unsecured Credit Facility [Member]
|
May 18, 2011
Senior Notes, 6.625% Due 2021 [Member]
|
Dec. 31, 2011
Senior Notes, 6.625% Due 2021 [Member]
|
Dec. 31, 2011
Line Of Credit Facility Lender Determined Amount [Member]
|
Dec. 31, 2011
Line Of Credit Facility Commitment Amount [Member]
|
|
| Debt Instrument [Line Items] | |||||||||||||
| Credit facility maximum credit amount | $ 750,000,000 | ||||||||||||
| Credit facility maturity date | May 24, 2012 | September 13, 2016 | |||||||||||
| Credit facility current credit amount | 600,000,000 | 250,000,000 | |||||||||||
| Commitment fee percentage under credit facility | 0.375% | 0.50% | |||||||||||
| Commitment fee under credit facility standard | 1.00% | ||||||||||||
| Origination, agency and syndication fees | 1,800,000 | ||||||||||||
| LIBOR plus interest rate | 1.75% | 2.50% | |||||||||||
| LIBOR interest rate plus one percent | LIBOR plus 1.00% | ||||||||||||
| Outstanding borrowings subject to LIBOR | 50,000,000 | ||||||||||||
| Payments of dividends exceeding percentage | 30.00% | ||||||||||||
| Current ratio of credit facility | 1 to 1 | ||||||||||||
| Leverage ratio of long-term debt | 4 to 1 | ||||||||||||
| 6.625% senior subordinated notes due 2021 | 250,000,000 | 0 | |||||||||||
| Interest percentage of senior subordinated notes | 6.625% | ||||||||||||
| Debt instrument maturity date | 2021 | ||||||||||||
| Senior subordinated notes maturity period | May 15, 2021 | ||||||||||||
| Proceeds from sale of notes | 244,000,000 | ||||||||||||
| Aggregate principal amount | 250,000,000 | ||||||||||||
| Deducting fees for debt issuance | 6,000,000 | ||||||||||||
| Repayment of outstanding borrowings under unsecured credit facility | 220,300,000 | ||||||||||||
| Significant restrictions on received funds from subsidiaries | 0 | ||||||||||||
| Debt instrument redemption date | May 15, 2016 | ||||||||||||
| Percentage of maximum, aggregate principal equity amount | 35.00% | ||||||||||||
| Proceed from equity offerings redemption price percentage | 106.625% | ||||||||||||
| Minimum redemption percentage of debt outstanding | 65.00% | ||||||||||||
| Equal redemption price percentage of principal amount of debt | 100.00% | ||||||||||||
| Senior notes repurchase price in percentage | 101.00% | ||||||||||||
| 2012 | 12,200,000 | ||||||||||||
| 2013 | 3,100,000 | ||||||||||||
| 2014 | 20,000,000 | ||||||||||||
| 2015 | 2,900,000 | ||||||||||||
| 2016 | $ 52,900,000 | ||||||||||||
| X | ||||||||||
|
- Definition
Commitment Fee Under Credit Facility Standard No definition available.
|
| X | ||||||||||
|
- Definition
Current Ratio Of Credit Facility No definition available.
|
| X | ||||||||||
|
- Definition
Debt Instrument Maturity Period No definition available.
|
| X | ||||||||||
|
- Definition
Debt instrument redemption date No definition available.
|
| X | ||||||||||
|
- Definition
Equal redemption price percentage of principal amount of debt No definition available.
|
| X | ||||||||||
|
- Definition
Estimated Annual Payments, Long Term Debt and Other Liabilities, Due in the Next Twelve Months No definition available.
|
| X | ||||||||||
|
- Definition
Estimated Annual Payments, Long Term Debt and Other Liabilities, Due in Year Five No definition available.
|
| X | ||||||||||
|
- Definition
Estimated Annual Payments, Long Term Debt and Other Liabilities, Due in Year Four No definition available.
|
| X | ||||||||||
|
- Definition
Estimated Annual Payments, Long Term Debt and Other Liabilities, Due in Year Three No definition available.
|
| X | ||||||||||
|
- Definition
Estimated Annual Payments, Long Term Debt and Other Liabilities, Due in Year Two 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
Minimum Redemption Percentage of Debt Outstanding No definition available.
|
| X | ||||||||||
|
- Definition
Outstanding borrowings subject to LIBOR. No definition available.
|
| X | ||||||||||
|
- Definition
Credit Facility prohibits the payment of dividends over 0.25 of CNI for preceding fiscal year. No definition available.
|
| X | ||||||||||
|
- Definition
Percentage of Maximum Aggregate Principal Equity Amount of the original principal amount that can be redeemed No definition available.
|
| X | ||||||||||
|
- Definition
Proceed From Equity Offerings Redemption Price Percentage No definition available.
|
| X | ||||||||||
|
- Definition
Senior Notes Instrument Maturity Date No definition available.
|
| X | ||||||||||
|
- Definition
Senior Notes Repurchase Price in Percentage for change of control No definition available.
|
| X | ||||||||||
|
- Definition
Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
| X | ||||||||||
|
- Details
|
| 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.
|
| 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
|
| 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
|
| 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
|
| 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
|
| X | ||||||||||
|
- Definition
The cash inflow from a borrowing supported by a written promise to pay an obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
|
Long-Term Debt And Other Long-Term Liabilities (Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Long-Term Debt And Other Long-Term Liabilities [Abstract] | ||
| Credit agreement with average interest rates, of 2.7% and 3.5% at December 31, 2011 and 2010, respectively | $ 50,000 | $ 163,000 |
| 6.625% senior subordinated notes due 2021 | 250,000 | 0 |
| Total long-term debt | $ 300,000 | $ 163,000 |
| Revolving credit facility interest rate including the effect of hedging | 2.70% | 3.50% |
| Interest percentage of senior subordinated notes | 6.625% | |
| Debt instrument maturity date | 2021 |
| X | ||||||||||
|
- Definition
Debt Instrument Maturity Period No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount borrowed under the credit facility as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The effective interest rate at the end of the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
|
Long-Term Debt And Other Long-Term Liabilities (Other Long-Term Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|---|---|---|---|
| Long-Term Debt And Other Long-Term Liabilities [Abstract] | |||
| ARO liability | $ 96,446 | $ 69,265 | $ 56,404 |
| Workers' compensation | 17,026 | 17,566 | |
| Separation benefit plans | 6,845 | 5,690 | |
| Gas balancing liability | 3,263 | 3,263 | |
| Deferred compensation plan | 2,463 | 2,368 | |
| Other liabilities | 126,043 | 98,152 | |
| Less current portion | 12,213 | 10,122 | |
| Total other long-term liabilities | $ 113,830 | $ 88,030 |
| X | ||||||||||
|
- Definition
Gas Balancing Liability No definition available.
|
| X | ||||||||||
|
- Definition
Carrying value as of the balance sheet date of obligations and payables pertaining to separation benefit plan liabilities. 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
|
| X | ||||||||||
|
- Details
|
| 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.
|
| X | ||||||||||
|
- Definition
The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Aggregate carrying amount, 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 and of liabilities not separately disclosed in the balance sheet. 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
Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
|
Asset Retirement Obligations (Schedule Of Asset Retirement Obligations) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|||||||
| Asset Retirement Obligations [Abstract] | ||||||||
| ARO liability, January 1: | $ 69,265 | $ 56,404 | ||||||
| Accretion of discount | 3,838 | 2,937 | ||||||
| Liability incurred | 15,068 | [1] | 4,768 | |||||
| Liability settled | (1,009) | (763) | ||||||
| Revision of estimates | 9,284 | [2] | 5,919 | [2] | ||||
| ARO liability, December 31: | 96,446 | 69,265 | ||||||
| Less current portion | 3,040 | 1,915 | ||||||
| Total long-term ARO liability | $ 93,406 | $ 67,350 | ||||||
|
||||||||
| 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
|
| 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
|
| 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
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of asset retirement obligations incurred during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
| X | ||||||||||
|
- Definition
Amount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for 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
|
| 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
|
|
Income Taxes (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2011
|
|
| Income Taxes [Abstract] | |
| Operating loss carryforwards | $ 119.8 |
| Operating loss expiration period | expire from 2015 to 2031 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The expiration date of each operating loss carryforward included in total operating loss carryforwards, or the applicable range of such expiration dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Income Taxes (Reconciliation Of Income Tax Expense (Benefit)) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Income Taxes [Abstract] | |||
| Income tax expense (benefit) computed by applying the statutory rate | $ 111,651 | $ 83,027 | $ (30,704) |
| State income tax, net of federal benefit | 8,941 | 6,030 | (2,409) |
| Statutory depletion and other | 2,543 | 1,680 | 887 |
| Total income taxes | $ 123,135 | $ 90,737 | $ (32,226) |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the different methods of depletion allowed under generally accepted accounting principles and enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to state and local income tax expense or benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Income Taxes (Schedule Of Total Provision For Income Taxes) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Income Taxes [Abstract] | |||
| Current taxes, Federal | $ (3,159) | $ (6,856) | $ (5,124) |
| Current taxes, State | 743 | (3,079) | 4,901 |
| Current taxes | (2,416) | (9,935) | (223) |
| Deferred taxes, Federal | 109,363 | 88,021 | (23,510) |
| Deferred taxes, State | 16,188 | 12,651 | (8,493) |
| Deferred taxes | 125,551 | 100,672 | (32,003) |
| Total income taxes | $ 123,135 | $ 90,737 | $ (32,226) |
| X | ||||||||||
|
- Definition
The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable Income or Loss from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable Income or Loss from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of total income tax expense for the period comprised of the increase (decrease) during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted tax law. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of total income tax expense for the period comprised of the increase (decrease) in the entity's state and local deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the applicable enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Income Taxes [Abstract] | ||
| Allowance for losses and nondeductible accruals | $ 53,376 | $ 47,742 |
| Net operating loss carryforward | 47,683 | 2,926 |
| Alternative minimum tax credit carryforward | 0 | 0 |
| Deferred tax assets, total | 101,059 | 50,668 |
| Depreciation, depletion, amortization and impairment | (773,246) | (593,237) |
| Net deferred tax liability | (672,187) | (542,569) |
| Current deferred tax asset | 10,936 | 13,537 |
| Non-current-deferred tax liability | $ (683,123) | $ (556,106) |
| X | ||||||||||
|
- Definition
Deferred tax assets tax deferred expense allowance for losses and nondeductible accruals No definition available.
|
| X | ||||||||||
|
- Definition
Deferred tax liability depreciation, depletion, amortization and impairment No definition available.
|
| X | ||||||||||
|
- Definition
For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. An unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward is presented as a reduction of the related deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The tax effect as of the balance sheet date of the amount of future tax deductions arising from unused alternative minimum tax credit carryforwards; a tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Employee Benefit Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
Dec. 31, 2011
Employee Thrift Plan [Member]
|
Dec. 31, 2010
Employee Thrift Plan [Member]
|
Dec. 31, 2009
Employee Thrift Plan [Member]
|
Dec. 31, 2011
Salary Deferral Plan [Member]
|
Dec. 31, 2010
Salary Deferral Plan [Member]
|
Jan. 01, 1997
Separation Plan [Member]
weeks
years
|
May 05, 2004
Special Separation Benefit Plan [Member]
years
|
Dec. 31, 2011
Change Of Control Contracts [Member]
years
|
Dec. 31, 2011
Plan 401k [Member]
years
|
|
| Defined Benefit Plan Disclosure [Line Items] | ||||||||||||
| Contribution of shares, common stock | 71,742 | 74,205 | 202,655 | |||||||||
| Recognized expense, common stock | $ 4.3 | $ 3.6 | $ 3.6 | |||||||||
| Liability recorded under deferral plan | 2.5 | 2.4 | ||||||||||
| Service period, years | 20 | 20 | ||||||||||
| Maximum period benefit, weeks | 104 | |||||||||||
| Age limit | 65 | |||||||||||
| Separation benefit plans expense | $ 1.9 | $ 1.6 | $ 1.5 | |||||||||
| Employee contract period, years | 3 | |||||||||||
| Multiple for determination compensation | 2.9 | |||||||||||
| Additional period for 401k, years | 3 | |||||||||||
| X | ||||||||||
|
- Definition
Defined Benefit Plan, Additional Period No definition available.
|
| X | ||||||||||
|
- Definition
Defined Benefit Plan, Age No definition available.
|
| X | ||||||||||
|
- Definition
Defined Benefit Plan, Employee Contract Period No definition available.
|
| X | ||||||||||
|
- Definition
Defined Benefit Plan, Maximum Period Benefit No definition available.
|
| X | ||||||||||
|
- Definition
Defined Benefit Plan, Multiple for Executive Compensation No definition available.
|
| X | ||||||||||
|
- Definition
Defined Benefit Plans, Service Period No definition available.
|
| X | ||||||||||
|
- Definition
Separation benefit plans expense. 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
The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan. No definition available.
|
|
Transactions With Related Parties (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
years
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Related Party Transaction [Line Items] | |||
| Minimum salary for employees to participate in the oil and gas partnership | $ 36,000 | $ 36,000 | $ 36,000 |
| Contract drilling | 352,000 | 529,000 | 368,000 |
| Well supervision and other fees | 396,000 | 386,000 | 352,000 |
| General and administrative expense reimbursement | $ 610,000 | $ 536,000 | $ 376,000 |
| Number of oil and gas limited partnerships | 16 | ||
| Number of oil and gas limited partnerships for third party investment | 3 | ||
| Number of oil and gas limited partnerships for employee investment | 13 | ||
| Number of natural gas wells selling | 23 | ||
| Term of agreement period | 5 | ||
|
Superior Pipeline Company, L.L.C. [Member]
|
|||
| Related Party Transaction [Line Items] | |||
| Proceeds from sales of volumes gathered and processed under the agreement percentage | 10.00% | ||
|
Minimum [Member]
|
|||
| Related Party Transaction [Line Items] | |||
| Interest rate of employee partnerships in oil and gas properties | 1.00% | ||
|
Maximum [Member]
|
|||
| Related Party Transaction [Line Items] | |||
| Interest rate of employee partnerships in oil and gas properties | 15.00% | ||
|
Sullivan And Company, L.L.C. [Member]
|
|||
| Related Party Transaction [Line Items] | |||
| Proceeds from sales of volumes gathered and processed under the agreement percentage | 90.00% | ||
| X | ||||||||||
|
- Definition
Contract drilling fees. No definition available.
|
| X | ||||||||||
|
- Definition
General and administrative expense reimbursement No definition available.
|
| X | ||||||||||
|
- Definition
Interest rate of employee partnerships in oil and gas properties No definition available.
|
| X | ||||||||||
|
- Definition
Minimum salary for employees to participate in the oil and gas partnership. No definition available.
|
| X | ||||||||||
|
- Definition
Number of oil and gas limited partnerships No definition available.
|
| X | ||||||||||
|
- Definition
Number of oil and gas limited partnerships for employee investment No definition available.
|
| X | ||||||||||
|
- Definition
Number of oil and gas limited partnerships for third party investment No definition available.
|
| X | ||||||||||
|
- Definition
Proceeds from sales of volumes gathered and processed under the agreement percentage No definition available.
|
| X | ||||||||||
|
- Definition
Term of agreement period No definition available.
|
| X | ||||||||||
|
- Definition
Well supervision and other fees No definition available.
|
| X | ||||||||||
|
- Definition
The total number of producing gas wells and gas wells capable of production, in which the entity owns an undivided working interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Shareholder Rights Plan (Details) (USD $)
|
12 Months Ended |
|---|---|
|
Dec. 31, 2011
days
|
|
| Shareholder Rights Plan [Abstract] | |
| Right of common stock | one |
| Percentage of fair value of common stock that can be acquired | 50.00% |
| Rights become exercisable period, in days | 10 |
| Minimum percentage of common stock that should be acquired | 15.00% |
| Redemption price per share | $ 0.01 |
| Shareholder rights plan expiration date | May 19, 2015 |
| X | ||||||||||
|
- Definition
Minimum percentage of common stock that should be acquired for the shareholder rights plan to be exercisable. No definition available.
|
| X | ||||||||||
|
- Definition
Percentage of fair value of common stock that can be acquired. No definition available.
|
| X | ||||||||||
|
- Definition
Right of common stock No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Shareholder rights plan expiration date. No definition available.
|
| X | ||||||||||
|
- Definition
Vesting period for shareholder rights plan. No definition available.
|
| X | ||||||||||
|
- Definition
Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
May 05, 2010
|
May 29, 2009
|
Dec. 31, 2011
years
|
Dec. 31, 2010
|
Dec. 31, 2009
|
Dec. 31, 2011
Stock Options Plan [Member]
|
Dec. 31, 2010
Stock Options Plan [Member]
|
Dec. 31, 2009
Stock Options Plan [Member]
|
Dec. 31, 2011
Restricted Stock [Member]
years
|
Dec. 31, 2010
Restricted Stock [Member]
|
Dec. 31, 2009
Restricted Stock [Member]
|
Dec. 31, 2008
Restricted Stock [Member]
|
Dec. 31, 2011
Restricted Stock [Member]
Maximum [Member]
|
Dec. 31, 2011
Restricted Stock [Member]
Minimum [Member]
|
Dec. 31, 2011
Stock Appreciation Rights (SARs) [Member]
years
|
Dec. 31, 2010
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2009
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2011
Directors Plan [Member]
|
Dec. 31, 2010
Directors Plan [Member]
|
Dec. 31, 2009
Directors Plan [Member]
|
Dec. 31, 2011
Incentive Stock Options [Member]
|
Dec. 31, 2011
First Half Of 2014 [Member]
Maximum [Member]
|
Dec. 31, 2011
First Half Of 2014 [Member]
Minimum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||
| Unrecognized compensation cost related to unvested awards | $ 8.4 | ||||||||||||||||||||||
| Unrecognized compensation cost, expect to be capitalized | 1.7 | ||||||||||||||||||||||
| Weighted average years over which this cost will be recognized | 0.8 | ||||||||||||||||||||||
| Shares issued | 116,826 | ||||||||||||||||||||||
| Maximum number of shares of common stock previously allowed for the issuance | 210,000 | ||||||||||||||||||||||
| Maximum number of shares of common stock allowed for the issuance | 510,000 | 2,500,000 | 2,700,000 | 2,000,000 | |||||||||||||||||||
| Vesting rate of options | 20.00% | ||||||||||||||||||||||
| Grant date fair value | 3.3 | 0.2 | 1.0 | 10.8 | 16.9 | 0.7 | 0.8 | 0.1 | |||||||||||||||
| Number of shares, granted | 24,504 | 3,500 | 437 | 0 | 0 | 0 | 0 | 0 | 0 | 31,500 | 52,504 | 3,496 | |||||||||||
| SAR expire years | 10 | 10 years | |||||||||||||||||||||
| Shares vested | 6,200 | 27,100 | 33,745 | 48,632 | 48,633 | 31,500 | 52,504 | 3,496 | |||||||||||||||
| Restricted stock awards vested period | six | three | one | ||||||||||||||||||||
| Vesting period | six | three | one | ||||||||||||||||||||
| Number of Shares, Beginning Balance | 184,765 | 219,625 | 228,290 | 145,901 | 145,901 | 145,901 | 178,500 | 143,496 | 153,000 | ||||||||||||||
| Shares Outstanding | 138,980 | 184,765 | 219,625 | 145,901 | 145,901 | 145,901 | 199,500 | 178,500 | 143,496 | ||||||||||||||
| Aggregate intrinsic value | 20.8 | 0.2 | |||||||||||||||||||||
| Weighted average remaining contractual term, years | 5.7 | ||||||||||||||||||||||
| Restricted share granted | 211,050 | 450,355 | 0 | ||||||||||||||||||||
| Restricted share vested | 190,262 | 496,497 | 68,836 | ||||||||||||||||||||
| Restricted share outstanding | 447,961 | 446,125 | 507,071 | 617,148 | |||||||||||||||||||
| Shares outstanding subjected to vest | 447,961 | 446,125 | 507,071 | 617,148 | |||||||||||||||||||
| Number of Shares, Ending Balance | 447,961 | 446,125 | 507,071 | 617,148 | |||||||||||||||||||
| Restricted stock weighted average remaining contractual term, years | 1.0 | ||||||||||||||||||||||
| Exercised intrinsic value | 1.3 | 10.1 | 0.4 | ||||||||||||||||||||
| Cash received from the options exercised | 0.4 | 0.2 | |||||||||||||||||||||
| Contingent options | 3,063 | ||||||||||||||||||||||
| Outstanding options number of shares | 138,980 | ||||||||||||||||||||||
| Exercisable options number of shares | 138,980 | 184,065 | 212,725 | ||||||||||||||||||||
| Exercisable options weighted average exercise price | $ 31.39 | $ 31.02 | $ 29.25 | ||||||||||||||||||||
| Exercisable options intrinsic value | 2.1 | ||||||||||||||||||||||
| Contractual term, years | 2.5 | ||||||||||||||||||||||
| Outstanding and exercisable options number of shares | 199,500 | 178,500 | 143,496 | ||||||||||||||||||||
| Outstanding and exercisable options weighted average exercise price | $ 48.37 | $ 45.86 | $ 49.38 | ||||||||||||||||||||
| Outstanding and exercisable options intrinsic value | $ 1.2 | ||||||||||||||||||||||
| Outstanding and exercisable options weighted average remaining contractual life, years | 6.1 | ||||||||||||||||||||||
| Restricted stock awards to be vested | 30.00% | ||||||||||||||||||||||
| Restricted stock awards granted to designated executive officers | 20,062 | ||||||||||||||||||||||
| Performance percentage criteria | 150.00% | 50.00% | |||||||||||||||||||||
| X | ||||||||||
|
- Definition
Employee Service Share Based Compensation Allocation Of Unrecognized Period Costs Capitalized Amount No definition available.
|
| X | ||||||||||
|
- Definition
Performance Percentage Criteria No definition available.
|
| X | ||||||||||
|
- Definition
Restricted Stock Awards Granted To Vested In Period if performance criteria are met. No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Contingent Options No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation arrangement by share based payment award number of shares previously authorized No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Options Cash Received From Options Exercised No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Fair Value No definition available.
|
| X | ||||||||||
|
- Definition
share based compensation shares authorized under stock option plans exercise exercisable options aggregate intrinsic value No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation shares authorized under stock option plans exercise exercisable options weighted average exercise price1 No definition available.
|
| X | ||||||||||
|
- Definition
share Based compensation shares authorized under stock option plans exercise exercisable options weighted average remaining contractual term1 No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation shares authorized under stock option plans exercise number of outstanding options No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation shares authorized under stock option plans exercise outstanding and exercisable options intrinsic value No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation shares authorized under stock option plans exercise outstanding and exercisable options weighted average exercise price No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation shares authorized under stock option plans exercise outstanding and exercisable options weighted average remaining contractual term1 No definition available.
|
| X | ||||||||||
|
- Definition
Share based compensation shares authorized under stock option plans number of exercisable options No definition available.
|
| X | ||||||||||
|
- Definition
Vesting rate of options No definition available.
|
| X | ||||||||||
|
- Definition
As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The date when the equity-based award expires as specified in the award agreement, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Description of the period of time over 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, which may be expressed in a variety of ways (for example, in years, month and year). 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
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average period between the balance sheet date and expiration for equity-based awards other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan), which may be expressed in a decimal value for number of years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| 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
|
| X | ||||||||||
|
- Definition
The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The number of shares newly issued during the reporting period under the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Stock-Based Compensation (Schedule Of Restricted Stock Awards Stock Options And SAR) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Stock-Based Compensation [Abstract] | |||
| Recognized stock compensation expense | $ 10.0 | $ 10.8 | $ 9.2 |
| Capitalized stock compensation cost for our oil and natural gas properties | 2.5 | 2.7 | 2.1 |
| Tax benefit on stock based compensation | $ 3.9 | $ 4.1 | $ 2.6 |
| X | ||||||||||
|
- Details
|
| 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
Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Stock-Based Compensation (Estimated Fair Value Of The Stock Options Granted) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
May 05, 2010
|
Dec. 31, 2011
|
Dec. 31, 2009
|
Dec. 31, 2011
Stock Option [Member]
years
|
Dec. 31, 2010
Stock Option [Member]
years
|
Dec. 31, 2009
Stock Option [Member]
years
|
||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||
| Options granted | 24,504 | 3,500 | 437 | 31,500 | 52,504 | [1] | 3,496 | ||
| Stock appreciation rights | 0 | 0 | 0 | ||||||
| Estimated fair value (in millions) | $ 0.7 | $ 0.8 | $ 0.1 | ||||||
| Estimate of stock volatility | 0.48 | 0.45 | 0.41 | ||||||
| Estimated dividend yield | 0.00% | 0.00% | 0.00% | ||||||
| Risk free interest rate | 2.00% | 2.00% | 2.00% | ||||||
| Expected life range based on prior experience (in years) | 5 | 5 | 5 | ||||||
| Forfeiture rate | 0.00% | 0.00% | 5.00% | ||||||
| Contingent options | 3,063 | ||||||||
| Number of directors receiving options | 8 | ||||||||
|
|||||||||
| X | ||||||||||
|
- Definition
Number of Directors receiving options on May 6, 2010 No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Contingent Options No definition available.
|
| 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 Fair Value Assumptions Estimated Stock Volatility No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Rate No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Stock Appreciation Rights No definition available.
|
| X | ||||||||||
|
- Definition
The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Stock-Based Compensation (Activity Pertaining To SAR, Stock Option Plan And Directors Plan) (Details) (USD $)
|
0 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
May 05, 2010
|
Dec. 31, 2011
|
Dec. 31, 2009
|
Dec. 31, 2011
Stock Options Plan [Member]
|
Dec. 31, 2010
Stock Options Plan [Member]
|
Dec. 31, 2009
Stock Options Plan [Member]
|
Dec. 31, 2011
Restricted Stock [Member]
|
Dec. 31, 2010
Restricted Stock [Member]
|
Dec. 31, 2009
Restricted Stock [Member]
|
Dec. 31, 2008
Restricted Stock [Member]
|
Dec. 31, 2011
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2010
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2009
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2011
Directors Plan [Member]
|
Dec. 31, 2010
Directors Plan [Member]
|
Dec. 31, 2009
Directors Plan [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Number of Shares, Beginning Balance | 184,765 | 219,625 | 228,290 | 145,901 | 145,901 | 145,901 | 178,500 | 143,496 | 153,000 | |||||||
| Weighted Average Grant Date Price, Beginning Balance | $ 31.11 | $ 29.61 | $ 29.68 | $ 47.44 | $ 47.39 | $ 47.46 | $ 47.40 | $ 46.59 | $ 46.59 | $ 46.59 | $ 48.77 | $ 49.38 | $ 46.85 | |||
| Number of shares, granted | 24,504 | 3,500 | 437 | 0 | 0 | 0 | 0 | 0 | 0 | 31,500 | 52,504 | 3,496 | ||||
| Weighted Average Grant Date Price, Granted | $ 0.00 | $ 0.00 | $ 0.00 | $ 55.91 | $ 41.09 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 53.81 | $ 37.62 | $ 31.30 | ||||
| Number of Shares, Exercised | (42,285) | (32,360) | (4,065) | 0 | 0 | 0 | (10,500) | (3,500) | (13,000) | |||||||
| Weighted Average Grant Date Price, Exercised | $ 28.29 | $ 20.35 | $ 23.45 | $ 0.00 | $ 0.00 | $ 0.00 | $ 21.96 | $ 17.54 | $ 14.74 | |||||||
| Number of Shares, Forfeited | (3,500) | (2,500) | (4,600) | 0 | 0 | 0 | 0 | (14,000) | ||||||||
| Weighted Average Grant Date Price, Forfeited | $ 53.90 | $ 37.83 | $ 38.60 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 58.20 | ||||||||
| Number of Shares, Ending Balance | 138,980 | 184,765 | 219,625 | 145,901 | 145,901 | 145,901 | 199,500 | 178,500 | 143,496 | |||||||
| Weighted Average Grant Date Price, Ending Balance | $ 31.39 | $ 31.11 | $ 29.61 | $ 47.44 | $ 47.39 | $ 47.46 | $ 47.40 | $ 46.59 | $ 46.59 | $ 46.59 | $ 48.37 | $ 48.77 | $ 49.38 | |||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Stock-Based Compensation (Activity Pertaining To Restricted Stock Awards) (Details) (USD $)
|
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
Stock Options Plan [Member]
|
Dec. 31, 2010
Stock Options Plan [Member]
|
Dec. 31, 2009
Stock Options Plan [Member]
|
Dec. 31, 2008
Stock Options Plan [Member]
|
Dec. 31, 2011
Restricted Stock [Member]
|
Dec. 31, 2010
Restricted Stock [Member]
|
Dec. 31, 2009
Restricted Stock [Member]
|
Dec. 31, 2011
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2010
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2009
Stock Appreciation Rights (SARs) [Member]
|
Dec. 31, 2008
Stock Appreciation Rights (SARs) [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||
| Number of Shares, Beginning Balance | 446,125 | 507,071 | 617,148 | ||||||||
| Weighted Average Grant Date Price, Beginning Balance | $ 31.39 | $ 31.11 | $ 29.61 | $ 29.68 | $ 47.39 | $ 47.46 | $ 47.40 | $ 46.59 | $ 46.59 | $ 46.59 | $ 46.59 |
| Number of Shares, Granted | 211,050 | 450,355 | 0 | ||||||||
| Weighted Average Grant Date Price, Granted | $ 0.00 | $ 0.00 | $ 0.00 | $ 55.91 | $ 41.09 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | ||
| Number of Shares, Vested | (190,262) | (496,497) | (68,836) | ||||||||
| Weighted Average Grant Date Price, Vested | $ 43.32 | $ 47.09 | $ 46.18 | ||||||||
| Number of Shares, Forfeited | (18,952) | (14,804) | (41,241) | ||||||||
| Weighted Average Grant Date Price, Forfeited | $ 44.55 | $ 44.25 | $ 48.69 | ||||||||
| Number of Shares, Ending Balance | 447,961 | 446,125 | 507,071 | ||||||||
| Weighted Average Grant Date Price, Ending Balance | $ 31.39 | $ 31.11 | $ 29.61 | $ 29.68 | $ 47.44 | $ 47.39 | $ 47.46 | $ 46.59 | $ 46.59 | $ 46.59 | $ 46.59 |
| X | ||||||||||
|
- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. 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
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Stock-Based Compensation (Shares Authorized Under Stock Option Plans By Exercise Price Range) (Details) (USD $)
|
12 Months Ended |
|---|---|
|
Dec. 31, 2011
years
|
|
|
$19.04 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Exercise Prices Minimum | $ 19.04 |
| Outstanding and Exercisable Options, Number Of Shares | 16,400 |
| Outstanding and Exercisable Options, Weighted Average Remaining Contractual Life, years | 1.0 |
| Outstanding and Exercisable Options, Weighted Average Exercise Price | $ 19.04 |
|
$21.50 - $22.95 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Exercise Prices Minimum | $ 21.50 |
| Exercise Prices Maximum | $ 22.95 |
| Outstanding and Exercisable Options, Number Of Shares | 38,810 |
| Outstanding and Exercisable Options, Weighted Average Remaining Contractual Life, years | 1.9 |
| Outstanding and Exercisable Options, Weighted Average Exercise Price | $ 22.76 |
|
$37.69 - $37.83 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Exercise Prices Minimum | $ 37.69 |
| Exercise Prices Maximum | $ 37.83 |
| Outstanding and Exercisable Options, Number Of Shares | 83,770 |
| Outstanding and Exercisable Options, Weighted Average Remaining Contractual Life, years | 3.0 |
| Outstanding and Exercisable Options, Weighted Average Exercise Price | $ 37.80 |
|
$20.10 - $20.46 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Exercise Prices Minimum | $ 20.10 |
| Exercise Prices Maximum | $ 20.46 |
| Outstanding and Exercisable Options, Number Of Shares | 14,000 |
| Outstanding and Exercisable Options, Weighted Average Remaining Contractual Life, years | 1.1 |
| Outstanding and Exercisable Options, Weighted Average Exercise Price | $ 20.37 |
|
$28.23 - $41.21 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Exercise Prices Minimum | $ 28.23 |
| Exercise Prices Maximum | $ 41.21 |
| Outstanding and Exercisable Options, Number Of Shares | 80,500 |
| Outstanding and Exercisable Options, Weighted Average Remaining Contractual Life, years | 6.4 |
| Outstanding and Exercisable Options, Weighted Average Exercise Price | $ 36.45 |
|
$53.81 - $73.26 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Exercise Prices Minimum | $ 53.81 |
| Exercise Prices Maximum | $ 73.26 |
| Outstanding and Exercisable Options, Number Of Shares | 105,000 |
| Outstanding and Exercisable Options, Weighted Average Remaining Contractual Life, years | 6.5 |
| Outstanding and Exercisable Options, Weighted Average Exercise Price | $ 61.24 |
| X | ||||||||||
|
- Definition
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding And Exercisable Options No definition available.
|
| X | ||||||||||
|
- Definition
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding And Exercisable Options Weighted Average Exercise Price No definition available.
|
| X | ||||||||||
|
- Definition
Share based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding And Exercisable Options Weighted Average Remaining Contractual Term1 No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Derivatives (Narrative) (Details) (USD $)
|
1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
|
May 31, 2011
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|||||
| Derivative Instruments, Gain (Loss) [Line Items] | |||||||
| Number of outstanding interest rate swaps terminated | two | ||||||
| Accumulated OCI gain (loss) net of tax | $ 19,026,000 | [1] | $ (6,851,000) | [1] | |||
| Expected earnings transfer | 18,000,000 | ||||||
| Period over which gain included in AOCI will be transferred to earnings, months | 12 | ||||||
| Expected derivative maturity date | Dec. 01, 2013 | ||||||
|
Interest Rate Swaps [Member]
|
|||||||
| Derivative Instruments, Gain (Loss) [Line Items] | |||||||
| Accumulated OCI gain (loss) net of tax | 0 | [1] | (996,000) | [1] | |||
|
Interest Rate Swaps [Member] | Cash Flow Hedging [Member]
|
|||||||
| Derivative Instruments, Gain (Loss) [Line Items] | |||||||
| Increase in interest expenses | 1,500,000 | ||||||
| Expense capitalized | 1,100,000 | ||||||
|
|||||||
| X | ||||||||||
|
- Definition
The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. No definition available.
|
| X | ||||||||||
|
- Definition
The time period estimated for the anticipated transfer of gains (losses), net from accumulated other comprehensive income into earnings. No definition available.
|
| X | ||||||||||
|
- Definition
Increase Decrease in Interest Expenses No definition available.
|
| X | ||||||||||
|
- Definition
Number Of Outstanding Interest Rate Swaps Terminated No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The date the derivative matures. No definition available.
|
| X | ||||||||||
|
- Definition
The amount of cash paid during the current period for interest that is capitalized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Derivatives (Cash Flow Hedges Outstanding) (Details) (Swap [Member])
|
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
bbl
|
||||||||||
|
WTI - NYMEX [Member] | Crude Oil [Member] | Jan'12 - Dec'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (in Bbl/day) | 5,250 | |||||||||
| Weighted Average Fixed Price for Swaps | 96.54 | |||||||||
|
WTI - NYMEX [Member] | Crude Oil [Member] | Jan'12 - Dec'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jan'12 | |||||||||
|
WTI - NYMEX [Member] | Crude Oil [Member] | Jan'12 - Dec'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Dec'12 | |||||||||
|
WTI - NYMEX [Member] | Crude Oil [Member] | Jan'13 - Dec'13 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (in Bbl/day) | 2,000 | |||||||||
| Weighted Average Fixed Price for Swaps | 102.05 | |||||||||
|
WTI - NYMEX [Member] | Crude Oil [Member] | Jan'13 - Dec'13 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jan'13 | |||||||||
|
WTI - NYMEX [Member] | Crude Oil [Member] | Jan'13 - Dec'13 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Dec'13 | |||||||||
|
IF - NYMEX (HH) [Member] | Natural Gas [Member] | Jan'12 - Dec'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (MMBtu/day) | 30,000 | |||||||||
| Weighted Average Fixed Price for Swaps | 5.05 | |||||||||
|
IF - NYMEX (HH) [Member] | Natural Gas [Member] | Jan'12 - Dec'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jan'12 | |||||||||
|
IF - NYMEX (HH) [Member] | Natural Gas [Member] | Jan'12 - Dec'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Dec'12 | |||||||||
|
IF - PEPL [Member] | Natural Gas [Member] | Jan'12 - Dec'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (MMBtu/day) | 15,000 | |||||||||
| Weighted Average Fixed Price for Swaps | 5.62 | |||||||||
|
IF - PEPL [Member] | Natural Gas [Member] | Jan'12 - Dec'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jan'12 | |||||||||
|
IF - PEPL [Member] | Natural Gas [Member] | Jan'12 - Dec'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Dec'12 | |||||||||
|
OPIS - Conway [Member] | Liquids [Member] | Jan'12 - Mar'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (Gal/mo) | 1,350,014 | [1] | ||||||||
| Weighted Average Fixed Price for Swaps | 1.10 | [1] | ||||||||
|
OPIS - Conway [Member] | Liquids [Member] | Jan'12 - Mar'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jan'12 | |||||||||
|
OPIS - Conway [Member] | Liquids [Member] | Jan'12 - Mar'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Mar'12 | |||||||||
|
OPIS - Conway [Member] | Liquids [Member] | Apr'12 - Dec'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (Gal/mo) | 180,006 | [2] | ||||||||
| Weighted Average Fixed Price for Swaps | 2.11 | [2] | ||||||||
|
OPIS - Conway [Member] | Liquids [Member] | Apr'12 - Dec'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Apr'12 | |||||||||
|
OPIS - Conway [Member] | Liquids [Member] | Apr'12 - Dec'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Dec'12 | |||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Jan'12 - Mar'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (Gal/mo) | 1,155,018 | [1] | ||||||||
| Weighted Average Fixed Price for Swaps | 0.91 | [1] | ||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Jan'12 - Mar'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jan'12 | |||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Jan'12 - Mar'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Mar'12 | |||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Apr'12 - Jun'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (Gal/mo) | 1,000,028 | [3] | ||||||||
| Weighted Average Fixed Price for Swaps | 0.78 | [3] | ||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Apr'12 - Jun'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Apr'12 | |||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Apr'12 - Jun'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jun'12 | |||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Jul'12 - Dec'12 [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Hedged Volume (Gal/mo) | 310,000 | [4] | ||||||||
| Weighted Average Fixed Price for Swaps | 0.69 | [4] | ||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Jul'12 - Dec'12 [Member] | Start [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Jul'12 | |||||||||
|
OPIS - Mont Belvieu [Member] | Liquids [Member] | Jul'12 - Dec'12 [Member] | End [Member]
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||
| Commodity Derivatives Term | Dec'12 | |||||||||
|
||||||||||
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Hedged Volume Of Natural Gas No definition available.
|
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Hedged Volume Of Natural Gas In Gallons No definition available.
|
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Hedged Volume Of Oil No definition available.
|
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Weighted Average Fixed Price For Swaps No definition available.
|
| X | ||||||||||
|
- Definition
Commodity Derivatives Description Terms No definition available.
|
| X | ||||||||||
|
- Details
|
|
Derivatives (Schedule Of Subsequent Cash Flow Hedges) (Details) (Swap [Member])
|
12 Months Ended |
|---|---|
|
Dec. 31, 2011
bbl
|
|
|
Jan'13 - Dec'13 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Hedged Volume (in Bbl/day) | 2,000 |
| Weighted Average Fixed Price for Swaps | 102.05 |
|
Start [Member] | Jan'13 - Dec'13 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Jan'13 |
|
End [Member] | Jan'13 - Dec'13 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Dec'13 |
|
Subsequent To December 31, 2011 [Member] | Mar'12 - Dec'12 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Hedged Volume (in Bbl/day) | 1,000 |
| Weighted Average Fixed Price for Swaps | 103.90 |
|
Subsequent To December 31, 2011 [Member] | Jan'13 - Dec'13 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Hedged Volume (in Bbl/day) | 1,000 |
| Weighted Average Fixed Price for Swaps | 101.63 |
|
Subsequent To December 31, 2011 [Member] | Jul'12 - Sep'12 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Hedged Volume (MMBtu/day) | 20,000 |
| Weighted Average Fixed Price for Swaps | 2.98 |
|
Subsequent To December 31, 2011 [Member] | Start [Member] | Mar'12 - Dec'12 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Mar'12 |
|
Subsequent To December 31, 2011 [Member] | Start [Member] | Jan'13 - Dec'13 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Jan'13 |
|
Subsequent To December 31, 2011 [Member] | Start [Member] | Jul'12 - Sep'12 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Jul'12 |
|
Subsequent To December 31, 2011 [Member] | End [Member] | Mar'12 - Dec'12 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Dec'12 |
|
Subsequent To December 31, 2011 [Member] | End [Member] | Jan'13 - Dec'13 [Member] | Crude Oil [Member] | WTI - NYMEX [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Dec'13 |
|
Subsequent To December 31, 2011 [Member] | End [Member] | Jul'12 - Sep'12 [Member] | Natural Gas [Member] | IF - NYMEX (HH) [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | |
| Commodity Derivatives Term | Sep'12 |
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Hedged Volume Of Natural Gas No definition available.
|
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Hedged Volume Of Oil No definition available.
|
| X | ||||||||||
|
- Definition
Cash Flow Hedge Derivative Instrument Weighted Average Fixed Price For Swaps No definition available.
|
| X | ||||||||||
|
- Definition
Commodity Derivatives Description Terms No definition available.
|
| X | ||||||||||
|
- Details
|
|
Derivatives (Fair Value Of Derivative Instruments And Locations In Balance Sheets) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Derivatives, Fair Value [Line Items] | ||
| Current derivative assets | $ 31,938 | $ 5,568 |
| Non-current derivative assets | 4,514 | 2,537 |
| Total derivatives assets | 36,452 | 8,105 |
| Current portion of derivative liabilities | 2,657 | 14,446 |
| Non-current derivative liabilities | 0 | 4,359 |
| Total derivative liabilities | 2,657 | 18,805 |
|
Designated As Hedging Instrument [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Total derivatives assets | 36,452 | 7,628 |
| Total derivative liabilities | 2,657 | 18,664 |
|
Designated As Hedging Instrument [Member] | Interest Rate Swaps [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Current portion of derivative liabilities | 0 | 1,139 |
| Non-current derivative liabilities | 0 | 475 |
|
Designated As Hedging Instrument [Member] | Commodity Contract [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Current derivative assets | 31,938 | 5,091 |
| Non-current derivative assets | 4,514 | 2,537 |
| Current portion of derivative liabilities | 2,657 | 13,166 |
| Non-current derivative liabilities | 0 | 3,884 |
|
Not Designated As Hedging Instrument [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Total derivatives assets | 0 | 477 |
| Total derivative liabilities | 0 | 141 |
|
Not Designated As Hedging Instrument [Member] | Commodity Contract [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Current derivative assets | 0 | 477 |
|
Not Designated As Hedging Instrument [Member] | Commodity Basis Swap [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Current portion of derivative liabilities | $ 0 | $ 141 |
| X | ||||||||||
|
- Definition
Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments which are expected to exist longer than one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Derivatives (Amount Of Gain Or (Loss) Recognized In Accumulated OCI On Derivative) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||
| Amount of Gain or (Loss) Recognized in Accumulated OCI on Derivative | $ 19,026 | [1] | $ (6,851) | [1] | ||
|
Commodity Derivatives [Member]
|
||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||
| Amount of Gain or (Loss) Recognized in Accumulated OCI on Derivative | 19,026 | [1] | (5,855) | [1] | ||
|
Interest Rate Swaps [Member]
|
||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||
| Amount of Gain or (Loss) Recognized in Accumulated OCI on Derivative | $ 0 | [1] | $ (996) | [1] | ||
|
||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Derivatives (Gain Or Loss Of Reclassified Accumulated Other Comprehensive Income And Recognized Income) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income | $ 2,965 | [1] | $ 52,255 | [1] | ||||
| Amount of Gain or (Loss) Recognized in Income | 2,749 | [2] | 700 | [2] | ||||
|
Oil And Natural Gas Revenue [Member] | Commodity Derivatives [Member]
|
||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income | 4,699 | [1] | 53,473 | [1] | ||||
| Amount of Gain or (Loss) Recognized in Income | 2,749 | [2] | 700 | [2] | ||||
|
Interest Rate Swaps [Member] | Interest [Member]
|
||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income | (1,734) | [1] | (1,218) | [1] | ||||
| Amount of Gain or (Loss) Recognized in Income | $ 0 | [2] | $ 0 | [2] | ||||
|
||||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Derivatives (Effect Of Derivative Instruments Recognized In Statement Of Operations, Not Designated As Hedging Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Amount of Gain or (Loss) Recognized in Income on Derivative | $ (1,047) | $ 336 |
|
Commodity Derivatives [Member] | Oil And Natural Gas Revenue [Member]
|
||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Amount of Gain or (Loss) Recognized in Income on Derivative | $ (1,047) | $ 336 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Loss included in earnings for the period from the change in fair value of derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Fair Value Measurements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
|
|---|---|
| Fair Value Measurements [Abstract] | |
| Carrying amount of long-term debt | $ 250.0 |
| Estimated fair value of long-term debt | $ 250.6 |
| X | ||||||||||
|
- Definition
Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| 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.
|
|
Fair Value Measurements (Recurring Fair Value Measurements) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | $ 33,800 | |
|
Interest Rate Swaps [Member] | Swap [Member]
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | (1,614) | |
|
Interest Rate Swaps [Member] | Swap [Member] | Level 2 [Member]
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | 0 | |
|
Interest Rate Swaps [Member] | Swap [Member] | Level 3 [Member]
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | (1,614) | |
|
Commodity Derivatives [Member]
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | 33,795 | (9,086) |
| Assets | 44,019 | 11,546 |
| Liabilities | (10,224) | (20,632) |
|
Commodity Derivatives [Member] | Level 2 [Member]
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | 180 | (19,954) |
| Assets | 9,698 | 0 |
| Liabilities | (9,518) | (19,954) |
|
Commodity Derivatives [Member] | Level 3 [Member]
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial assets (liabilities) | 33,615 | 10,868 |
| Assets | 34,321 | 11,546 |
| Liabilities | $ (706) | $ (678) |
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of the gross assets less the gross liabilities of a derivative asset or group of derivative assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of the gross assets less the gross liabilities of a derivative liability or group of derivative liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Fair Value Measurements (Reconciliations Of Level 3 Fair Value Measurements) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|||||
|
Interest Rate Swaps [Member]
|
||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||||
| Beginning of period | $ (1,614) | $ (1,948) | ||||
| Included in earnings (loss) | (1,734) | [1] | (1,218) | [1] | ||
| Included in other comprehensive income (loss) | 1,614 | 334 | ||||
| Settlements | 1,734 | 1,218 | ||||
| End of period | 0 | (1,614) | ||||
| Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (loss) relating to assets still held at end of period | 0 | 0 | ||||
|
Commodity Swap [Member]
|
||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||||
| Beginning of period | 10,868 | 19,948 | ||||
| Included in earnings (loss) | 20,086 | [1] | 64,470 | [1] | ||
| Included in other comprehensive income (loss) | 22,503 | (10,116) | ||||
| Settlements | (19,842) | (63,434) | ||||
| End of period | 33,615 | 10,868 | ||||
| Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (loss) relating to assets still held at end of period | $ 244 | $ 1,036 | ||||
|
||||||
| X | ||||||||||
|
- Definition
Total Gains Losses for the Period Included in Earnings Attributable to change in unrealized gain/loss. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets measured at fair value on a recurring basis using unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Commitments And Contingencies (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Commitments And Contingencies [Abstract] | |||
| Lease expiration date | September, 2015 | ||
| Future minimum rental payments under leases, year one | $ 6,200,000 | ||
| Future minimum rental payments under leases, year two | 4,500,000 | ||
| Future minimum rental payments under leases, year three | 1,900,000 | ||
| Future minimum rental payments under leases, year four | 200,000 | ||
| Repurchase of limited units outstanding | 20.00% | ||
| Repurchase of limited units outstanding amount | 22,000 | 22,000 | 1,000 |
| Rent expense incurred | 3,700,000 | 1,800,000 | 2,100,000 |
| Amount of commitments to be purchased in the next twelve months | 6,600,000 | ||
| Amount remaining towards gas treating plant | $ 300,000 | ||
| X | ||||||||||
|
- Definition
Amount of commitments to be purchased in the next twelve months. No definition available.
|
| X | ||||||||||
|
- Definition
Amount Remaining Towards Gas Treating Plant 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 | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The date upon which a lease or a group of leases is set to expire. No definition available.
|
| X | ||||||||||
|
- Definition
Future rental payments receivable within one year of the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Future rental payments receivable within the fourth year from the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Future rental payments receivable within the third year from the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Future rental payments receivable within the second year from the balance sheet date under an operating lease. 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
|
|
Industry Segment Information (Revenue From Different Segments) (Details) (USD $)
|
1 Months Ended | 3 Months Ended | 12 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2009
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2010
|
Sep. 30, 2010
|
Jun. 30, 2010
|
Mar. 31, 2010
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
||||||||||
| Industry Segment Information [Abstract] | |||||||||||||||||||||
| Contract drilling | $ 536,872,000 | $ 356,527,000 | $ 251,364,000 | ||||||||||||||||||
| Elimination of inter-segment revenue | (52,221,000) | (40,143,000) | (15,049,000) | ||||||||||||||||||
| Contract drilling net of inter-segment revenue | 484,651,000 | 316,384,000 | 236,315,000 | ||||||||||||||||||
| Oil and natural gas | 516,316,000 | 400,807,000 | 357,879,000 | ||||||||||||||||||
| Gas gathering and processing | 284,248,000 | 201,320,000 | 142,491,000 | ||||||||||||||||||
| Elimination of inter-segment revenue | (76,010,000) | (46,804,000) | (33,863,000) | ||||||||||||||||||
| Gas gathering and processing net of inter-segment revenue | 208,238,000 | 154,516,000 | 108,628,000 | ||||||||||||||||||
| Other, net | (834,000) | 10,138,000 | 7,076,000 | ||||||||||||||||||
| Total revenues | 345,626,000 | 323,845,000 | 291,495,000 | 247,405,000 | 252,576,000 | 218,116,000 | 204,603,000 | 206,550,000 | 1,208,371,000 | 881,845,000 | 709,898,000 | ||||||||||
| Contract drilling | 135,085,000 | 59,601,000 | 50,909,000 | ||||||||||||||||||
| Oil and natural gas | 201,695,000 | 176,649,000 | (125,777,000) | [1] | |||||||||||||||||
| Gas gathering and processing | 17,278,000 | 16,985,000 | 4,616,000 | ||||||||||||||||||
| Total operating income (loss) | 354,058,000 | [2] | 253,235,000 | [2] | (70,252,000) | [2] | |||||||||||||||
| General and administrative expense | (30,055,000) | (26,152,000) | (24,011,000) | ||||||||||||||||||
| Interest expense, net | (4,167,000) | 0 | (539,000) | ||||||||||||||||||
| Other income (loss), net | (834,000) | 10,138,000 | 7,076,000 | ||||||||||||||||||
| Income (loss) before income taxes | 319,002,000 | 237,221,000 | (87,726,000) | ||||||||||||||||||
| Contract drilling | 1,118,666,000 | 998,658,000 | 951,702,000 | ||||||||||||||||||
| Oil and natural gas | 1,820,492,000 | 1,441,797,000 | 1,068,970,000 | ||||||||||||||||||
| Gas gathering and processing | 247,763,000 | 176,596,000 | 247,763,000 | 176,596,000 | 163,625,000 | ||||||||||||||||
| Total identifiable assets | 3,186,921,000 | [3] | 2,617,051,000 | [3] | 2,184,297,000 | [3] | |||||||||||||||
| Corporate assets | 69,799,000 | 52,189,000 | 44,102,000 | ||||||||||||||||||
| Total assets | 3,256,720,000 | 2,669,240,000 | 3,256,720,000 | 2,669,240,000 | 2,228,399,000 | ||||||||||||||||
| Contract drilling | 162,208,000 | 118,806,000 | 67,686,000 | ||||||||||||||||||
| Oil and natural gas | 580,055,000 | 463,870,000 | 230,550,000 | ||||||||||||||||||
| Gas gathering and processing | 79,355,000 | 29,815,000 | 9,899,000 | ||||||||||||||||||
| Other | 10,791,000 | 6,417,000 | 474,000 | ||||||||||||||||||
| Total capital expenditures | 832,409,000 | 618,908,000 | 308,609,000 | ||||||||||||||||||
| Contract drilling | 79,667,000 | 69,970,000 | 45,326,000 | ||||||||||||||||||
| Depreciation, depletion and amortization | 183,350,000 | 118,793,000 | 114,681,000 | ||||||||||||||||||
| Impairment of oil and natural gas properties | 0 | 0 | 281,241,000 | [1] | |||||||||||||||||
| Gas gathering and processing | 16,101,000 | 15,385,000 | 16,104,000 | ||||||||||||||||||
| Other | 1,333,000 | 976,000 | 1,055,000 | ||||||||||||||||||
| Total depreciation, depletion, amortization and impairment | 280,451,000 | 205,124,000 | 458,407,000 | ||||||||||||||||||
| Non-cash write down of our oil and natural gas properties | 281,200,000 | ||||||||||||||||||||
| Non-cash write down of our oil and natural gas properties net of tax | $ 175,100,000 | ||||||||||||||||||||
|
|||||||||||||||||||||
| X | ||||||||||
|
- Definition
Capital expenditure contract drilling No definition available.
|
| X | ||||||||||
|
- Definition
Capital expenditure gas gathering and processing No definition available.
|
| X | ||||||||||
|
- Definition
Capital expenditure oil and natural gas No definition available.
|
| X | ||||||||||
|
- Definition
Contract Drilling, Depreciation. No definition available.
|
| X | ||||||||||
|
- Definition
Contract Drilling Identifiable Assets No definition available.
|
| X | ||||||||||
|
- Definition
Contract Drilling Operating Income Loss No definition available.
|
| X | ||||||||||
|
- Definition
Revenue from contract drilling services and mobilization of equipment. No definition available.
|
| X | ||||||||||
|
- Definition
Contract Drilling Revenues Gross No definition available.
|
| X | ||||||||||
|
- Definition
Corporate assets No definition available.
|
| X | ||||||||||
|
- Definition
Elimination Of Inter Segment Revenue Of Contract Drilling No definition available.
|
| X | ||||||||||
|
- Definition
Elimination Of Inter Segment Revenue Of Gas gathering and processing No definition available.
|
| X | ||||||||||
|
- Definition
Gas gathering and processing identifiable assets. No definition available.
|
| X | ||||||||||
|
- Definition
Gas Gathering And Processing Operating Income Loss No definition available.
|
| X | ||||||||||
|
- Definition
Gas Gathering And Processing Revenue Gross No definition available.
|
| X | ||||||||||
|
- Definition
Gas Gathering Transportation Marketing And Processing, Depreciation. No definition available.
|
| X | ||||||||||
|
- Definition
Non Cash Write Down Of Oil And Natural Gas Properties No definition available.
|
| X | ||||||||||
|
- Definition
Non Cash Write Down Of Oil And Natural Gas Properties Net Of Tax No definition available.
|
| X | ||||||||||
|
- Definition
Oil and natural gas depreciation, depletion and amortization. No definition available.
|
| X | ||||||||||
|
- Definition
Oil and natural gas identifiable assets No definition available.
|
| X | ||||||||||
|
- Definition
Oil And Natural Gas Operating Income Loss No definition available.
|
| X | ||||||||||
|
- Definition
Other capital expenditure No definition available.
|
| X | ||||||||||
|
- Definition
Total capital expenditures No definition available.
|
| X | ||||||||||
|
- Definition
Total Depreciation Depletion Amortization And Impairment No definition available.
|
| X | ||||||||||
|
- Definition
Total identifiable assets No definition available.
|
| 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
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
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. 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
Aggregate revenue during the period related to oil and gas business activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
|
- Definition
The other noncash expense, not otherwise specified in the taxonomy, charged against earnings in the period to allocate the cost of tangible and intangible assets over their remaining economic lives. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Selected Quarterly Financial Information (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2010
|
Sep. 30, 2010
|
Jun. 30, 2010
|
Mar. 31, 2010
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|||||||
| Selected Quarterly Financial Information [Abstract] | |||||||||||||||||
| Revenues | $ 345,626 | $ 323,845 | $ 291,495 | $ 247,405 | $ 252,576 | $ 218,116 | $ 204,603 | $ 206,550 | $ 1,208,371 | $ 881,845 | $ 709,898 | ||||||
| Gross profit | 94,745 | [1] | 96,581 | 89,164 | 73,568 | 77,046 | [1] | 63,371 | 53,499 | 59,319 | |||||||
| Net income (loss) | $ 51,661 | $ 53,360 | $ 49,819 | $ 41,027 | $ 43,665 | $ 34,491 | $ 32,175 | $ 36,153 | $ 195,867 | $ 146,484 | $ (55,500) | ||||||
| Basic | $ 1.08 | $ 1.12 | $ 1.05 | $ 0.86 | $ 0.92 | $ 0.73 | $ 0.68 | $ 0.77 | $ 4.11 | $ 3.10 | $ (1.18) | ||||||
| Diluted | $ 1.08 | [2] | $ 1.11 | $ 1.04 | $ 0.86 | $ 0.92 | $ 0.73 | $ 0.68 | $ 0.76 | $ 4.08 | $ 3.09 | $ (1.18) | |||||
|
|||||||||||||||||
| 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
|
| 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
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
|
| 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
Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Supplemental Oil And Gas Disclosures (Schedule Of Capitalized Costs And Costs Incurred On Oil And Gas Properties) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Supplemental Oil And Gas Disclosures [Abstract] | |||
| Proved properties | $ 3,302,032 | $ 2,738,093 | $ 2,309,193 |
| Unproved properties | 185,632 | 175,065 | 140,129 |
| Capitalized costs gross | 3,487,664 | 2,913,158 | 2,449,322 |
| Accumulated depreciation, depletion, amortization and impairment | (1,724,312) | (1,542,352) | (1,424,559) |
| Net capitalized costs | 1,763,352 | 1,370,806 | 1,024,763 |
| Unproved properties acquired | 70,999 | 75,739 | 37,137 |
| Proved properties acquired | 50,013 | 50,000 | 3,722 |
| Exploration | 43,836 | 48,304 | 30,547 |
| Development | 391,862 | 279,903 | 154,579 |
| Asset retirement obligation | 23,345 | 9,924 | 4,565 |
| Total costs incurred | $ 580,055 | $ 463,870 | $ 230,550 |
| X | ||||||||||
|
- Definition
Capital expenditure oil and natural gas No definition available.
|
| X | ||||||||||
|
- Definition
Costs incurred in asset retirement obligation. No definition available.
|
| X | ||||||||||
|
- Definition
Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net amount of capitalized costs relating to oil and gas producing activities. 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 of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have unproved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Supplemental Oil And Gas Disclosures (Schedule Of The Oil And Natural Gas Property Costs Not Being Amortized) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
Dec. 31, 2008
|
|
| Supplemental Oil And Gas Disclosures [Abstract] | ||||
| Undeveloped Leasehold Acquired | $ 59,691 | $ 49,923 | $ 17,766 | $ 58,252 |
| Undeveloped Leasehold Acquired, Total | $ 185,632 | |||
| X | ||||||||||
|
- Definition
The sum of the capitalized costs incurred during the period 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
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 | ||||||||||
|
- Details
|
|
Supplemental Oil And Gas Disclosures (Results Of Operations For Producing Activities) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Supplemental Oil And Gas Disclosures [Abstract] | |||
| Revenues | $ 504,739 | $ 392,229 | $ 352,572 |
| Production costs | (115,400) | (91,143) | (75,214) |
| Depreciation, depletion, amortization and impairment | (181,960) | (117,793) | (394,942) |
| Results of operations, income before income taxes | 207,379 | 183,293 | (117,584) |
| Income tax (expense) benefit | (80,048) | (70,110) | 43,153 |
| Results of operations for producing activities (excluding corporate overhead and financing costs) | $ 127,331 | $ 113,183 | $ (74,431) |
| X | ||||||||||
|
- Definition
Results of operations oil and gas income before income taxes. No definition available.
|
| X | ||||||||||
|
- Definition
Results of operations oil and gas income tax expense. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Depreciation, depletion and amortization, and valuation provisions (impairments) related to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The results of operations for oil and gas producing activities, excluding corporate overhead and interest costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Production (lifting) costs from oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Total revenues from oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Supplemental Oil And Gas Disclosures (Schedule Of Proved Developed And Undeveloped Oil And Gas Reserve Quantities) (Details)
|
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
bbl
|
Dec. 31, 2010
bbl
|
Dec. 31, 2009
bbl
|
Jun. 02, 2010
bbl
|
||||||||
|
Oil [Member]
|
|||||||||||
| Reserve Quantities [Line Items] | |||||||||||
| Beginning of year | 17,494,000 | 11,669,000 | 9,699,000 | ||||||||
| Revision of previous estimates | 374,000 | [1] | 434,000 | [1] | 459,000 | [1] | |||||
| Extensions and discoveries | 3,477,000 | 3,473,000 | 2,135,000 | ||||||||
| Infill reserves in existing proved fields | 1,229,000 | 2,152,000 | 618,000 | [2] | |||||||
| Purchases of minerals in place | 192,000 | 1,293,000 | 44,000 | ||||||||
| Production | (2,511,000) | (1,521,000) | (1,286,000) | ||||||||
| Sales | 0 | (6,000) | |||||||||
| End of Year | 20,255,000 | 17,494,000 | 11,669,000 | ||||||||
| Beginning of year, developed | 12,773,000 | 9,183,000 | 7,508,000 | 511,000 | |||||||
| End of year, developed | 15,618,000 | 12,773,000 | 9,183,000 | 511,000 | |||||||
| Beginning of year, undeveloped | 4,721,000 | 2,486,000 | 2,191,000 | ||||||||
| End of year, undeveloped | 4,637,000 | 4,721,000 | 2,486,000 | ||||||||
|
Natural Gas Liquids [Member]
|
|||||||||||
| Reserve Quantities [Line Items] | |||||||||||
| Beginning of year | 16,117,000 | 14,653,000 | 10,171,000 | ||||||||
| Revision of previous estimates | 2,112,000 | [1] | (1,559,000) | [1] | 2,793,000 | [1] | |||||
| Extensions and discoveries | 3,924,000 | 878,000 | 1,996,000 | ||||||||
| Infill reserves in existing proved fields | 1,780,000 | 3,482,000 | 1,174,000 | [2] | |||||||
| Purchases of minerals in place | 393,000 | 212,000 | 7,000 | ||||||||
| Production | (2,239,000) | (1,549,000) | (1,488,000) | ||||||||
| Sales | 0 | 0 | |||||||||
| End of Year | 22,087,000 | 16,117,000 | 14,653,000 | ||||||||
| Beginning of year, developed | 12,088,000 | 11,538,000 | 8,638,000 | ||||||||
| End of year, developed | 16,649,000 | 12,088,000 | 11,538,000 | ||||||||
| Beginning of year, undeveloped | 4,029,000 | 3,115,000 | 1,533,000 | ||||||||
| End of year, undeveloped | 5,438,000 | 4,029,000 | 3,115,000 | ||||||||
|
Natural Gas [Member]
|
|||||||||||
| Reserve Quantities [Line Items] | |||||||||||
| Beginning of year | 420,486,000 | 419,061,000 | 450,135,000 | ||||||||
| Revision of previous estimates | (30,510,000) | [1] | (25,007,000) | [1] | (57,393,000) | [1] | |||||
| Extensions and discoveries | 39,836,000 | 31,328,000 | 50,480,000 | ||||||||
| Infill reserves in existing proved fields | 15,592,000 | 34,128,000 | 19,872,000 | [2] | |||||||
| Purchases of minerals in place | 40,835,000 | 1,732,000 | 30,000 | ||||||||
| Production | (44,104,000) | (40,756,000) | (44,063,000) | ||||||||
| Sales | 0 | 0 | |||||||||
| End of Year | 442,135,000 | 420,486,000 | 419,061,000 | ||||||||
| Beginning of year, developed | 346,928,000 | 338,217,000 | 355,824,000 | ||||||||
| End of year, developed | 372,311,000 | 346,928,000 | 338,217,000 | ||||||||
| Beginning of year, undeveloped | 73,558,000 | 80,844,000 | 94,311,000 | ||||||||
| End of year, undeveloped | 69,824,000 | 73,558,000 | 80,844,000 | ||||||||
|
|||||||||||
| X | ||||||||||
|
- Definition
Proved developed and undeveloped reserves infill reserves in existing proved fields. No definition available.
|
| X | ||||||||||
|
- Definition
Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Production of proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Purchase of minerals in place. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Sales of minerals in place. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other renewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Supplemental Oil And Gas Disclosures (Standardized Measure Of Discounted Future Cash Flows Relating To Proved Reserves Disclosure) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Supplemental Oil And Gas Disclosures [Abstract] | |||
| Future cash flows | $ 4,583,629 | $ 3,745,046 | $ 2,403,892 |
| Future production costs | (1,277,856) | (1,054,630) | (777,725) |
| Future development costs | (340,992) | (303,152) | (195,486) |
| Future income tax expenses | (952,736) | (799,260) | (433,366) |
| Future net cash flows | 2,012,045 | 1,588,004 | 997,315 |
| 10% annual discount for estimated timing of cash flows | (924,136) | (732,918) | (450,980) |
| Standardized measure of discounted future net cash flows relating to proved oil, NGLs and natural gas reserves | $ 1,087,909 | $ 855,086 | $ 546,335 |
| Percentage of annual discount for estimated timing of cash flows | 10.00% | 10.00% | 10.00% |
| X | ||||||||||
|
- Definition
Future net cash flows relating to proved oil and gas reserves future cash inflows. No definition available.
|
| X | ||||||||||
|
- Definition
Future net cash flows relating to proved oil and gas reserves future development costs. No definition available.
|
| X | ||||||||||
|
- Definition
Future net cash flows relating to proved oil and gas reserves future income tax expense. No definition available.
|
| X | ||||||||||
|
- Definition
Future net cash flows relating to proved oil and gas reserves future net cash flows. No definition available.
|
| X | ||||||||||
|
- Definition
Future net cash flows relating to proved oil and gas reserves future production costs. No definition available.
|
| X | ||||||||||
|
- Definition
Percentage of annual discount for estimated timing of cash flows. No definition available.
|
| X | ||||||||||
|
- Definition
This is the amount that is derived from using a discount rate of ten percent a year to reflect the timing of the future net cash flows relating to proved oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This amount is the future net cash flows less the computed discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Supplemental Oil And Gas Disclosures (Schedule Of Principal Sources Of Changes In Standardized Measure Of Discounted Future Net Cash Flows) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Reserve Quantities [Line Items] | |||
| Sales and transfers of oil and natural gas produced, net of production costs | $ (389,339) | $ (301,086) | $ (277,358) |
| Net changes in prices and production costs | 115,852 | 379,097 | (145,839) |
| Revisions in quantity estimates and changes in production timing | (38,336) | (67,116) | (54,327) |
| Extensions, discoveries and improved recovery, less related costs | 401,134 | 340,771 | 136,695 |
| Changes in estimated future development costs | 37,742 | 15,974 | 100,304 |
| Previously estimated cost incurred during the period | 45,327 | 45,327 | 16,301 |
| Purchases of minerals in place | 58,567 | 42,280 | 1,288 |
| Sales of minerals in place | (29) | (120) | 0 |
| Accretion of discount | 128,492 | 77,536 | 89,256 |
| Net change in income taxes | (60,675) | (200,815) | 39,062 |
| Other-net | (65,912) | (23,097) | 16,479 |
| Net change | 232,823 | 308,751 | (78,139) |
| Beginning of year | 855,086 | 546,335 | 624,474 |
| End of year | $ 1,087,909 | $ 855,086 | $ 546,335 |
|
Oil [Member]
|
|||
| Reserve Quantities [Line Items] | |||
| Average prices of oil and gas | $ 96.19 | ||
|
Natural Gas Liquids [Member]
|
|||
| Reserve Quantities [Line Items] | |||
| Average prices of oil and gas | $ 61.78 | ||
|
Natural Gas [Member]
|
|||
| Reserve Quantities [Line Items] | |||
| Average prices of oil and gas | $ 4.12 | ||
| X | ||||||||||
|
- Definition
The increase in the net discounted value of the proved oil and gas reserves due only to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The revenues derived from sales of oil or gas in each geographic area during the reporting period divided by the number of barrels of oil produced or thousands of cubic feet of gas produced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The change in the discounted value of the proved oil and gas reserves due to financial transactions where reserves (minerals in place) were sold. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This is the amount that proved oil and gas reserves increased due to extensions (increased estimates in the size of proven reserves), discoveries, additions, and improved recovery (increase in ability to extract oil and gas from existing reserves). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) in the evaluation or calculation of the costs that will be required in future periods to make it possible to extract or process proved oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) in the estimate of future income taxes that will be due on future pretax net cash flows relating to the enterprise's proved oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The change in the discounted value of the proved oil and gas reserves due to financial transactions where new reserves were purchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) in sales and transfer prices and in production (lifting) costs related to future production. The effects of changes in prices and costs are computed before the effects of changes in quantities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The actual costs incurred during the reporting period to make it possible to extract or process proved oil and gas reserves. These costs were previously estimated and reduced the estimate of discounted future cash flows from oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Any changes made during the period to the evaluation or calculation of the estimated quantity of oil or gas in proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of sales or transfers of oil gas that was previously included in proved oil and gas reserves. This amount is net of production costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Changes in the standardized measure of discounted future net cash flows relating to proved oil and gas reserves that are not otherwise specified in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) as a result of changes in the elements used to estimate the discounted future net cash flow relating to proved oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The balance as of the balance sheet date of the standardized measure of discounted future net cash flow relating to proved oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Schedule II - Valuation And Qualifying Accounts And Reserves (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Valuation And Qualifying Accounts And Reserves [Abstract] | |||
| Balance at Beginning of Period | $ 5,083 | $ 5,186 | $ 4,893 |
| Additions Charged to Costs And Expenses | 260 | 0 | 975 |
| Deductions And Net Write-Offs | 0 | (103) | (682) |
| Balance at End of Period | $ 5,343 | $ 5,083 | $ 5,186 |
| X | ||||||||||
|
- Definition
Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|