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Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Summary of changes in asset retirement obligations
The following table provides a summary of the changes in the Company’s asset retirement obligations:
(in thousands)Amount
Balance at January 1, 2021$14,020 
Accretion expense777 
Balance at June 30, 2021$14,797