Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation

A reconciliation of our liability for plugging and abandonment costs for the nine months ended September 30, 2018 is as follows (in thousands):

	Nine Months Ended September 30,  2018
Beginning of period	$	276,855
Liabilities incurred		2,668
Disposition of wells		(8,665	)
Acquisitions		13,438
Liabilities settled		(3,803	)
Accretion expense		12,132
Change in estimate		4,347
End of period		296,972
Less current portion		(6,327	)
Long-term asset retirement obligations	$	290,645