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Decommissioning and Other Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2013
Decommissioning and Other Asset Retirement Obligations (Tables)  
Decommissioning and Other Asset Retirement Obligations Table
 
 
Year Ended December 31,
 
 
2013
 
2012
 
 
(In Thousands)
Beginning balance for the period, as reported
 
$
94,921

 
$
139,835

Activity in the period:
 
 

 
 

Accretion of liability
 
673

 
1,536

Retirement obligations incurred
 
—

 
—

Revisions in estimated cash flows
 
74,946

 
40,986

Settlement of retirement obligations
 
(119,636
)
 
(87,436
)
Ending balance
 
$
50,904

 
$
94,921