XML 70 R27.htm IDEA: XBRL DOCUMENT v2.4.0.8
Asset Retirement Obligation (Tables)
9 Months Ended
Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligation
Activity related to the Company’s asset retirement obligation is as follows:
(In thousands)
 
Nine Months Ended 
 September 30, 2014
Balance at beginning of period
 
$
75,853

Liabilities incurred
 
4,360

Liabilities settled
 
(411
)
Liabilities divested
 
(899
)
Change in estimate
 
33,810

Accretion expense
 
3,528

Balance at end of period
 
$
116,241