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Asset Retirement Obligations | 3 Months Ended
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Mar. 31, 2013
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligations | Asset Retirement Obligations A reconciliation of the beginning and ending aggregate carrying amounts of the asset retirement obligations for the period from December 31, 2012 to March 31, 2013 is as follows (in thousands):
Asset retirement obligations at December 31, 2012 | $ | 498,410 |
Liability incurred upon acquiring and drilling wells | 1,102 |
Liability settled or disposed in current period | (50,722 | )
Accretion | 9,779 |
Asset retirement obligations at March 31, 2013 | 458,569 |
Less: current portion | 91,113 |
Asset retirement obligations, net of current | $ | 367,456 |
Liability settled or disposed during the three-month period ended March 31, 2013 includes $22.7 million for the balance of a plugging and abandonment obligation associated with the Company’s Bullwinkle platform in the Gulf of Mexico and $15.2 million disposed in conjunction with the sale of the Permian Properties in February 2013.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 143 -Paragraph 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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