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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Income Loss from Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2013 Mcfe MMcf MBbls | Jun. 30, 2012 MMcf Mcfe MBbls | Jun. 30, 2013 MMcf Mcfe MBbls | Jun. 30, 2012 Mcfe MBbls MMcf
Revenues: |  |  |  |  |  |  |  |
Oil and gas sales | $ 8,826 |  | $ 10,407 |  | $ 25,125 |  | $ 18,324 |
Costs and expenses: |  |  |  |  |  |  |  |
Production taxes | 427 |  | 519 |  | 1,120 |  | 909 |
Gathering and transportation | 170 |  | 232 |  | 501 |  | 409 |
Lease operating | 3,545 |  | 1,755 |  | 9,853 |  | 3,046 |
Depletion, depreciation and amortization |  |  | 4,408 |  | 8,649 |  | 6,194 |
Interest expense | 2,847 | [1] | 1,178 | [1] | 6,346 | [1] | 2,112 | [1]
Total costs and expenses | 6,989 |  | 8,092 |  | 26,469 |  | 12,670 |
Gain on sale of discontinued operations | 230,637 |  |  |  | 230,637 |  |  |
Income from discontinued operations before income taxes | 232,474 |  | 2,315 |  | 229,293 |  | 5,654 |
Income tax expense: |  |  |  |  |  |  |  |
Current | (637) |  |  |  | (637) |  |  |
Deferred | (80,601) |  | (11,860) |  | (80,047) |  | (15,241) |
Total income tax expense | (81,238) |  | (11,860) |  | (80,684) |  | (15,241) |
Net income (loss) from discontinued operations | $ 151,236 |  | $ (9,545) |  | $ 148,609 |  | $ (9,587) |
Net Production Data: |  |  |  |  |  |  |  |
Oil (Mbbls) | 96 |  | 124 |  | 270 |  | 197 |
Natural Gas (Mmcf) | 141 |  | 145 |  | 410 |  | 272 |
Natural Gas Equivalent (Mmcfe) | 720,000 |  | 885,000 |  | 2,031,000 |  | 1,451,000 |
[1] | Interest expense was allocated to discontinued operations based on the ratio of the net assets of discontinued operations to our consolidated net assets plus long-term debt. Interest expense is net of capitalized interest of $- and $2,253 for the three months ended June 30, 2013 and 2012, respectively, and $2,010 and $4,393 for the six months ended June 30, 2013 and 2012, respectively.

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