Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2021

Asset Retirement Obligation Disclosure [Abstract]

Schedule of asset retirement obligations

The following table describes the changes in our AROs (in thousands):

	2021		2020
AROs at January 1,	$	30,913	$	28,258
Revisions in estimates		(2,631)		—
Accretion expense		48		1,304
AROs at June 30,	$	28,330	$	29,562