Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2016

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, 2016 is as follows (in thousands):

	Nine Months Ended September 30,  2016
Beginning of period	$	264,137
Acquisition of wells		16,600
Liabilities incurred		1,516
Liabilities settled		(8,153	)
Disposition of wells		(4,731	)
Accretion expense		12,231
Change in estimate		3,139
End of period		284,739
Less current portion		(15,071	)
Long-term asset retirement obligations	$	269,668