Asset Retirement Obligations

6 Months Ended

Jun. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

ASSET RETIREMENT OBLIGATIONS

The following table summarizes the changes in the Company’s asset retirement obligations for the six months ended June 30, 2018 (in thousands).

Beginning asset retirement obligations	$	26,256
Liabilities incurred during period	1,589
Liabilities settled during period	(459		)
Accretion expense	739
Ending asset retirement obligations	28,125
Less: current asset retirement obligations(1)	(1,235		)
Long-term asset retirement obligations	$	26,890

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(1) Included in accrued liabilities in the Company’s interim unaudited condensed consolidated balance sheet at June 30, 2018.