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Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations Asset Retirement Obligations
    The table below summarizes the changes in our recorded asset retirement obligations (in thousands):
Year Ended December 31,
202120202019
Beginning balance$10,636 $10,180 $9,985 
Accretion expense873 490 331 
Revision in estimate3,602 — — 
Liabilities settled during period(697)(34)(136)
Ending balance$14,414 $10,636 $10,180