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Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2020
Asset Retirement Obligation [Abstract]  
Schedule of Change in Asset Retirement Obligation
The reconciliation of changes in asset retirement obligations is as follows:
December 31,
20202019
Balance, Beginning of Year$68,454 $38,554 
Obligations Divested(703)— 
Accretion Expense11,067 9,458 
Obligations Incurred2,806 2,933 
Obligations Settled(7,905)(4,231)
Revisions in Estimated Cash Flows19,449 21,740 
Balance, End of Year$93,168 $68,454