Asset Retirement Obligations Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2021

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The following table presents the changes in carrying amounts of the asset retirement obligations associated with our working interests in crude oil and natural gas properties for the periods presented:

	Year Ended December 31,
	2021		2020
	(in thousands)
Beginning balance	$	166,570	$	127,251
Obligations incurred with development activities and other	4,750		6,494
Obligations incurred with acquisition	—		47,673
Accretion expense	12,086		10,072
Revisions in estimated cash flows	10,609		4,742
Obligations discharged with asset retirements and divestitures	(34,343)		(29,662)
Asset retirement obligations at end of period	159,672		166,570
Current portion(1)	(32,146)		(33,933)
Long-term portion	$	127,526	$	132,637