Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2011

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

During the nine months ended September 30, 2011, 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 of ARO as of December 31, 2010	$	97,415
Liabilities incurred	3,761
Liabilities settled	(1,531		)
Accretion expense	5,066
Balance of ARO as of September 30, 2011	$	104,711