Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2017

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation

A reconciliation of our liability for plugging and abandonment costs for the three months ended March 31, 2017 is as follows (in thousands):

	Three Months Ended March 31,  2017
Beginning of period	$	257,943
Acquisition of wells		—
Liabilities incurred		1,645
Liabilities settled		(2,360	)
Disposition of wells		(2,402	)
Accretion expense		3,744
Change in estimate		69
End of period		258,639
Less current portion		(7,271	)
Long-term asset retirement obligations	$	251,368