Supplemental Information on Oil and Gas Producing Activities (Capitalized Costs Relating to Oil and Gas Producing Activities) (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Capitalized Costs Relating to Oil and Gas Producing Activities: | ||||
| Properties not being amortized | $ 10,000 | $ 47,290 | ||
| Properties being amortized | [1] | 423,541 | 347,186 | |
| Total capitalized costs | 433,541 | 394,476 | ||
| Less accumulated depreciation, depletion, and amortization | (400,168) | (289,272) | ||
| Net capitalized costs | 33,373 | 105,204 | ||
| Asset retirement cost | $ 8,700 | $ 5,200 | ||
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- Definition Capitalized Cost, Properties Being Amortized No definition available.
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- 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
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- Definition The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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
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- 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
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- Definition Net amount of capitalized costs relating to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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