Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Schedule of asset retirement obligations

The following table describes the changes in our AROs (both current and long-term) for the years ended December 31, 2020 and 2019 (in thousands):

	2020		2019
AROs at January 1,	$	28,258	$	—
Liability incurred during the period	—		53,294
Liability settled during the period	—		(28,296)
Revisions in estimated cash flows	—		822
Accretion expense	2,655		2,438
AROs at December 31,	$	30,913	$	28,258