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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of asset retirement obligations
The following table describes the changes in our AROs (in thousands):
AROs at January 1, 2020$28,258 
Other revisions in estimated cash flows— 
Accretion expense2,021 
AROs at September 30, 2020$30,279