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Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations Asset Retirement Obligations
The Company has asset retirement obligations associated with the future plugging and abandonment of oil and natural gas properties and related facilities. Revisions to the liability typically occur due to changes in the estimated abandonment costs, well economic lives, and the discount rate.
The following table summarizes the Company’s asset retirement obligation transactions recorded during the years ended December 31, 2020 and 2019 (in thousands):
 20202019
Beginning asset retirement obligations$2,164 $2,229 
Liabilities incurred106 105 
Property dispositions(10)(10)
Liabilities settled(195)(374)
Accretion expense307 214 
Revision of estimates655 — 
Ending asset retirement obligations$3,027 $2,164