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Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2013

Asset Retirement Obligation Disclosure [Abstract]

Reconciliation of Beginning and Ending Aggregate Carrying Amounts of Asset Retirement Obligation

A reconciliation of the beginning and ending aggregate carrying amounts of the asset retirement obligations for the period from December 31, 2012 to June 30, 2013 is as follows (in thousands):

Asset retirement obligations at December 31, 2012	$	498,410
Liability incurred upon acquiring and drilling wells	2,421
Liability settled or disposed in current period	(75,060		)
Accretion	19,579
Asset retirement obligations at June 30, 2013	445,350
Less: current portion	79,953
Asset retirement obligations, net of current	$	365,397

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- Definition

Tabular disclosure of the carrying amount of a liability for asset retirement obligations.

+ 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

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