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Supplemental Oil And Gas Disclosures | 12 Months Ended
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Dec. 31, 2011
Supplemental Oil And Gas Disclosures [Abstract] |
Supplemental Oil And Gas Disclosures | 17. Supplemental Oil and Gas Disclosures The supplemental data presented below reflects information for all of the Company's oil and natural gas producing activities. Capitalized Costs The following table sets forth the capitalized costs related to the Company's oil and natural gas producing activities at December 31, 2011 and 2010:
|  |  | September 30, |  |  |  | September 30, |
|  | December 31, |
|  | 2011 |  |  | 2010 |
|  | (In thousands) |
Proved oil and gas properties |  | $ | 1,152,532 |  |  | $ | 479,657 |
Less: Accumulated depreciation, depletion, amortization and impairment |  |  | (174,948 | ) |  |  | (98,821 | )
Proved oil and gas properties, net |  |  | 977,584 |  |  |  | 380,836 |
Unproved oil and gas properties |  |  | 82,825 |  |  |  | 101,311 |
Total oil and gas properties, net |  | $ | 1,060,409 |  |  | $ | 482,147 |
Pursuant to the FASB's authoritative guidance on ARO, net capitalized costs include asset retirement costs of $11.4 million and $6.3 million at December 31, 2011 and 2010, respectively. Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development Activities The following table sets forth costs incurred related to the Company's oil and natural gas activities for the years ended December 31, 2011, 2010 and 2009:
|  |  | September 30, |  |  |  | September 30, |  |  |  | September 30, |
|  | Year Ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
|  | (In thousands) |
Acquisition costs: |  |  |  |  |  |  |  |  |  |  |  |
Proved oil and gas properties |  | $ | 3,356 |  |  | $ | 20,259 |  |  | $ | 35,134 |
Unproved oil and gas properties |  |  | 15,197 |  |  |  | 81,624 |  |  |  | 13,917 |
Exploration costs |  |  | 1,685 |  |  |  | 297 |  |  |  | 1,019 |
Development costs |  |  | 618,737 |  |  |  | 243,758 |  |  |  | 38,526 |
Asset retirement costs |  |  | 5,055 |  |  |  | 968 |  |  |  | 1,314 |
Total costs incurred |  | $ | 644,030 |  |  | $ | 346,906 |  |  | $ | 89,910 |
Results of Operations for Oil and Natural Gas Producing Activities Results of operations for oil and natural gas producing activities, which excludes straight-line depreciation, general and administrative expenses and interest expense, are presented below.
|  |  | September 30, |  |  |  | September 30, |  |  |  | September 30, |
|  | December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
|  | (In thousands) |
Revenues |  | $ | 330,422 |  |  | $ | 128,927 |  |  | $ | 37,755 |
Production costs |  |  | 67,937 |  |  |  | 28,350 |  |  |  | 12,501 |
Depreciation, depletion and amortization |  |  | 74,101 |  |  |  | 37,583 |  |  |  | 16,592 |
Exploration costs |  |  | 1,685 |  |  |  | 297 |  |  |  | 1,019 |
Rig termination(1) |  |  | — |  |  |  | — |  |  |  | 3,000 |
Impairment of oil and gas properties |  |  | 3,610 |  |  |  | 11,967 |  |  |  | 6,233 |
Loss (gain) on sale of properties |  |  | 207 |  |  |  | — |  |  |  | (1,455 | )
Income tax expenses |  |  | 64,009 |  |  |  | 17,756 |  |  |  | — |
Results of operations for oil and gas producing activities |  | $ | 118,873 |  |  | $ | 32,974 |  |  | $ | (135 | )
(1) | During the first quarter of 2009, we paid a total of $3.0 million in rig termination expenses in connection with early termination of two drilling rig contracts entered into in 2008. We did not have any rig termination expenses during the years ended December 31, 2011 and 2010.

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- Definition The entire disclosure for oil and gas producing industries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59A-59Z, 59AA, 59BB, 59CC -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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