Accounting For Asset Retirement And Environmental Obligations (Tables)

12 Months Ended

Dec. 31, 2021

Asset Retirement Obligation Disclosure [Abstract]

Schedule Of Changes In Asset Retirement Obligations

The following represents changes in our asset retirement obligations for the years ended December 31, 2021 and 2020 (in thousands):

Asset retirement obligations as of December 31, 2019	$	173,669
Accretion expense		5,464
Asset retirement obligations as of December 31, 2020	$	179,133
Accretion expense		5,664
Asset retirement obligations as of December 31, 2021	$	184,797