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Asset Retirement Obligations - Reconciliation of Beginning and Ending Aggregate Carrying Amounts of Asset Retirement Obligations (Additional Information) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
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Feb. 28, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reconciliation Of Changes In Asset Retirement Obligations [Line Items] |  |  |  |
Asset retirement obligation, liabilities settled |  | $ 1,023 | $ 377,927 | $ 113,071
Gulf of Mexico Properties |  |  |  |
Reconciliation Of Changes In Asset Retirement Obligations [Line Items] |  |  |  |
Asset retirement obligation, liabilities settled | $ 366,000 |  |  |

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- Definition Reconciliation Of Changes In Asset Retirement Obligations [Line Items] + References No definition available. + Details
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- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Details
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