Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2021

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, 2021 and the year ended December 31, 2020 is as follows (in thousands):

	Six Months Ended June 30,  2021			Year Ended December 31, 2020
Beginning of period	$	79,822		$	251,076
Liabilities incurred		60			1,483
Acquisitions		—			123
Liabilities settled		(2,985	)		(4,634	)
Disposition of wells		—			(176,748	)
Accretion expense		2,639			7,518
Change in estimate		2,118			1,004
End of period		81,654			79,822
Less current portion		(6,689	)		(6,689	)
Long-term asset retirement obligations	$	74,965		$	73,133