XML 79 R52.htm IDEA: XBRL DOCUMENT v3.3.1.900
Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2015
Asset Retirement Obligation [Abstract]  
Schedule of Change in Asset Retirement Obligation
The following table describes the changes to the Company's asset retirement obligation liability:
 
Year Ended December 31,
 
2015
 
2014
 
(In thousands)
Balance at January 1 (including current portion)
$
418,118

 
$
427,653

Accretion expense
33,680

 
32,909

Obligations of divested operations
(334
)
 
(30,684
)
Adjustments to the liability from changes in estimates
(28,570
)
 
627

Liabilities settled
(12,440
)
 
(12,387
)
Balance at December 31
$
410,454

 
$
418,118

Current portion included in accrued expenses
(13,795
)
 
(19,222
)
Noncurrent liability
$
396,659

 
$
398,896