Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2017

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation

A reconciliation of our liability for plugging and abandonment costs for the six months ended June 30, 2017 is as follows (in thousands):

	Six Months Ended June 30,  2017
Beginning of period	$	257,943
Acquisition of wells		—
Liabilities incurred		3,672
Liabilities settled		(3,103	)
Disposition of wells		(2,402	)
Accretion expense		7,335
Change in estimate		148
End of period		263,593
Less current portion		(7,271	)
Long-term asset retirement obligations	$	256,322