Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations
The following table summarizes the period-to-period changes in the Company’s asset retirement obligations (“ARO”) that are associated with its oil and gas properties for the periods presented:
(in thousands)December 31, 2020December 31, 2019
Asset retirement obligations, beginning of period$16,874 $13,895 
Liabilities incurred589 1,393 
Liabilities on acquired properties147 1,167 
Liabilities divested and settled(578)(1,361)
Accretion expense1,128 912 
Revision to estimated cash flows(1,151)868 
Asset retirement obligations, end of period$17,009 $16,874