Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Details)

v3.20.2
Asset Retirement Obligations (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]  
Asset retirement obligations, beginning of period $ 14,431
Additional liabilities incurred 31
Accretion expense 217
Revision of estimates (8)
Asset retirement obligations, end of period $ 14,671