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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2013
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of change in asset retirement obligation
In 2013, 2012 and 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 as of December 31, 2010
$
97,415

Liabilities incurred
4,627

Liabilities settled
(1,539
)
Accretion expense (including discontinued operations of $1,138)
6,837

Balance as of December 31, 2011
107,340

Liabilities incurred
3,994

Liabilities settled
(845
)
Accretion expense (including discontinued operations of $1,195)
7,534

Balance as of December 31, 2012
118,023

Liabilities incurred
2,772

Liabilities settled
(5,525
)
Accretion expense (including discontinued operations of $1,197)
8,192

Reclassification associated with held for sale properties*
(14,929
)
Balance as of December 31, 2013
$
108,533


* Asset retirement obligation associated with North Louisiana/East Texas properties are included as liabilities related to assets held for sale in current liabilities on the balance sheet.