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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]  
Summary of change in asset retirement obligations
The following presents a reconciliation of the Company’s asset retirement obligations:
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2014
 
December 17, 2013
through
December 31, 2013
 
 
January 1, 2013
through
December 16, 2013
(in thousands)
 
 
 
 
 
 
Asset retirement obligations at beginning of period (1)
$
94,830

 
$
94,612

 
 
$
86,746

Liabilities added from drilling
5,124

 
—

 
 
10,097

Settlements
(5,260
)
 
—

 
 
(3,882
)
Liabilities added from acquisitions
25,223

 
—

 
 
—

Liabilities associated with assets divested
(5,460
)
 
—

 
 
(40
)
Current year accretion expense
5,670

 
218

 
 
7,136

Revision of estimates
1,633

 
—

 
 
5,900

Asset retirement obligations at end of period
$
121,760

 
$
94,830

 
 
$
105,957


(1) 
As a result of the application of pushdown accounting, the Company remeasured its asset retirement obligations on the LINN Energy transaction date.