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Asset Retirement Obligations (Tables)
 6 Months Ended
Jun. 30, 2015
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation
The following table reflects the components of the change in Energen’s ARO balance:

(in thousands)
 
Balance as of December 31, 2014
$
94,060

Liabilities incurred
770

Liabilities settled
(512
)
Accretion expense
3,679

Reclassification associated with held for sale properties*
1,052

Balance as of June 30, 2015
$
99,049


*Adjustment to the reclassification of the asset retirement obligation associated with certain San Juan Basin properties included as liabilities related to assets held for sale at December 31, 2014