Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 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		736		2,021
AROs at September 30,	$	29,018	$	30,279