Asset Retirement Obligations

9 Months Ended

Sep. 30, 2017

Asset Retirement Obligation Disclosure [Abstract]

ASSET RETIREMENT OBLIGATIONS

The following table summarizes the changes in the Company’s asset retirement obligations for the nine months ended September 30, 2017 (in thousands).

Beginning asset retirement obligations	$	20,640
Liabilities incurred during period	1,901
Liabilities settled during period	(349		)
Revisions in estimated cash flows	794
Accretion expense	937
Ending asset retirement obligations	23,923
Less: current asset retirement obligations(1)	(618		)
Long-term asset retirement obligations	$	23,305

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(1) Included in accrued liabilities in the Company’s interim unaudited condensed consolidated balance sheet at September 30, 2017.