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Acquisitions and Dispositions of Oil and Gas Properties - Results of Operations for Properties (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Oil And Gas Properties Sold [Abstract] |  |  |  |
Total oil and gas sales |  | $ 7,480 | $ 30,169 | $ 32,984
Total operating expenses | [1] | (5,690) | (83,275) | (47,639)
Operating income (loss) |  | $ 1,790 | $ (53,106) | $ (14,655)
[1] | Includes direct operating expenses, depreciation, depletion and amortization and exploration expense. Excludes interest expense, general and administrative expenses and depreciation, depletion and amortization expense subsequent to the date the assets were designated as held for sale.

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- Definition Oil and gas properties sold oil and gas sales. + References No definition available. + Details
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- Definition Oil and gas properties sold operating expenses. + References No definition available. + Details
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- Definition Oil and gas properties sold operating income loss. + References No definition available. + Details
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