Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2016

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, 2016 is as follows (in thousands):

	Six Months Ended June 30,  2016
Beginning of period	$	264,137
Liabilities incurred		921
Liabilities settled		(5,700	)
Disposition of wells		(4,731	)
Accretion expense		8,172
Change in estimate		2,819
End of period		265,618
Less current portion		(15,071	)
Long-term asset retirement obligations	$	250,547