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Asset Retirement Obligations
6 Months Ended
Jun. 30, 2014
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, 2013 to June 30, 2014 is as follows (in thousands):

Asset retirement obligations at December 31, 2013
$
424,117

Liability incurred upon acquiring and drilling wells
2,382

Revisions in estimated cash flows
(438
)
Liability settled or disposed in current period(1)
(377,662
)
Accretion
6,811

Asset retirement obligations at June 30, 2014
55,210

Less: current portion

Asset retirement obligations, net of current
$
55,210


____________________
(1)     Includes $366.0 million associated with the Gulf Properties sold in February 2014.