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Decommissioning and Other Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2014
Decommissioning and Other Asset Retirement Obligations (Tables)  
Decommissioning and Other Asset Retirement Obligations Table
 
 
Year Ended December 31,
 
 
2014
 
2013
 
 
(In Thousands)
Beginning balance for the period, as reported
 
$
50,904

 
$
94,921

Activity in the period:
 
 

 
 

Accretion of liability
 
728

 
673

Retirement obligations incurred
 
39,187

 
40,155

Revisions in estimated cash flows
 
35,241

 
34,791

Settlement of retirement obligations
 
(63,319
)
 
(119,636
)
Ending balance
 
$
62,741

 
$
50,904