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Asset Retirement Obligations
 3 Months Ended
Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]  
ASSET RETIREMENT OBLIGATIONS
ASSET RETIREMENT OBLIGATIONS
The following table summarizes the changes in the Company’s asset retirement obligations for the three months ended March 31, 2015 (in thousands).
 
 
Beginning asset retirement obligations
$
11,951

Liabilities incurred during period
2,404

Liabilities settled during period
(221
)
Revisions in estimated cash flows
(703
)
Accretion expense
112

Ending asset retirement obligations
13,543

Less: current asset retirement obligations(1)
(268
)
Long-term asset retirement obligations
$
13,275

 _______________
(1)
Included in accrued liabilities in the Company’s unaudited condensed consolidated balance sheet at March 31, 2015.