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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2013
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation
During the nine months ended September 30, 2013, Energen Resources recognized amounts representing expected future costs associated with site reclamation, facilities dismantlement, and plug and abandonment of wells as follows:

(in thousands)
 
Balance as of December 31, 2012
$
118,023

Liabilities incurred
2,466

Liabilities settled
(542
)
Accretion expense (including discontinued operations of $944)
6,131

Reclassification associated with held for sale properties*
(19,474
)
Balance as of September 30, 2013
$
106,604