Selected Quarterly Financial Data (Parenthetical) (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||
| Ceiling test write-down of oil and natural gas properties | $ 32,400,000 | $ 441,600,000 | $ 252,800,000 | $ 260,400,000 | $ 987,238,000 | $ 0 | $ 0 |
| X | ||||||||||
- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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