XML 40 R29.htm IDEA: XBRL DOCUMENT v3.21.2
ASSET RETIREMENT OBLIGATIONS (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Changes in the Company's asset retirement obligations          
Beginning asset retirement obligations     $ 38,542    
Liabilities incurred during period     1,066    
Liabilities settled during period     (96)    
Divestitures during period     (709)    
Accretion expense $ 518 $ 478 1,529 $ 1,449  
Ending asset retirement obligations 40,332   40,332    
Less: current asset retirement obligations [1] (231)   (231)    
Long-term asset retirement obligations $ 40,101   $ 40,101   $ 37,919
[1] Included in accrued liabilities in the Company’s interim unaudited condensed consolidated balance sheet at September 30, 2021.