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Acquisitions and Divestitures - Additional Information (Detail) (USD $)
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3 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | |||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Dec. 31, 2012
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Oct. 05, 2012
Newfield Properties
acre
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Jun. 30, 2013
Newfield Properties
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Oct. 05, 2012
Newfield Properties
Overriding Royalty Interests
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Jun. 30, 2013
Newfield Properties Post Acquisition
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Jun. 30, 2013
Newfield Properties Post Acquisition
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May 15, 2012
South Timbalier 41
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| Business Acquisition [Line Items] | |||||||||||
| Total cash paid for acquisition | $ 205,732,000 | ||||||||||
| Number of federal offshore blocks | 78 | ||||||||||
| Leasehold interest acres acquired, gross | 416,000 | ||||||||||
| Leasehold interest acres acquired, net | 268,000 | ||||||||||
| Number of deep water federal offshore blocks | 65 | 3 | |||||||||
| Number of productive deep water federal offshore blocks | 6 | 2 | |||||||||
| Number of conventional shelf blocks | 10 | ||||||||||
| Number of producing conventional shelf blocks | 4 | ||||||||||
| Adjustments to purchase price | 200,000 | ||||||||||
| Revenues | 235,383,000 | 215,513,000 | 494,605,000 | 451,399,000 | 33,700,000 | 62,300,000 | |||||
| Lease operating expenses | 68,248,000 | 60,276,000 | 127,590,000 | 116,938,000 | 7,600,000 | 14,100,000 | |||||
| Depreciation, depletion, amortization and accretion | 99,896,000 | 85,941,000 | 208,767,000 | 174,432,000 | 15,800,000 | 26,400,000 | |||||
| Income tax expense | 12,423,000 | 34,153,000 | 27,325,000 | 36,134,000 | 3,600,000 | 7,600,000 | |||||
| Net income | 22,396,000 | 53,567,000 | 49,014,000 | 56,785,000 | 6,700,000 | 14,200,000 | |||||
| Expenses associated with acquisition activities and transition activities | 0 | ||||||||||
| Purchase price allocation of unevaluated properties for oil and gas interests | 127,918,000 | 127,918,000 | 123,503,000 | 13,100,000 | 13,100,000 | ||||||
| Assumed borrowings | 1,099,537,000 | 1,099,537,000 | 1,087,611,000 | 205,700,000 | 205,700,000 | ||||||
| Effective interest rate | 7.70% | 7.70% | |||||||||
| Federal statutory income tax rate | 35.00% | 35.00% | |||||||||
| Percentage of non-operating working interest sold | 40.00% | ||||||||||
| Proceeds from sale of non-operating working interest | 30,500,000 | ||||||||||
| Reversal of asset retirement obligation | $ 4,000,000 | ||||||||||
| X | ||||||||||
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- Definition
Amount of cash paid to acquire the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount 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
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- Definition
The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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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- Definition
Lease expense related to property used in oil and gas production. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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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- Definition
Cash outflow representing an adjustment to the purchase price of a previous acquisition. No definition available.
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- 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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- Definition
The value of all consideration given or received by the Entity in the significant acquisition or disposal. No definition available.
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- Definition
The estimated (or appraised) value of leases or parts of leases to which proved reserves cannot be attributable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Asset Retirement Obligation Reversal Related To Sale Of Facilities No definition available.
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- Definition
Non-Operating Working Interest, Percentage Sold No definition available.
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- Definition
Number Of Acres Of Oil And Gas Leasehold Interests Acquired, Gross No definition available.
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- Definition
Number Of Acres Of Oil And Gas Leasehold Interests Acquired, Net No definition available.
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- Definition
Number of Conventional Shelf Blocks No definition available.
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- Definition
Number of Deepwater Federal Offshore Blocks No definition available.
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- Definition
Number of Deepwater Producing Blocks No definition available.
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| X | ||||||||||
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- Definition
Number of Federal Offshore Blocks No definition available.
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| X | ||||||||||
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- Definition
Number of Producing Conventional Shelf Blocks No definition available.
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