Quarterly report [Sections 13 or 15(d)]

ASSET RETIREMENT OBLIGATIONS (Details)

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ASSET RETIREMENT OBLIGATIONS (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
ASSET RETIREMENT OBLIGATIONS          
Asset retirement obligations, beginning of period     $ 548,832 $ 498,815  
Liabilities settled     (24,873) (20,342)  
Accretion expense $ 8,002 $ 7,848 25,075 24,217  
Liabilities acquired       17,647  
Disposition of oil and natural gas properties     (1,469)    
Liabilities incurred     1,029    
Revisions of estimated liabilities     17,427 34,690  
Asset retirement obligations, end of period 566,021 555,027 566,021 555,027  
Less: Current portion (34,528) (45,139) (34,528) (45,139) $ (46,326)
Long-term $ 531,493 $ 509,888 $ 531,493 $ 509,888 $ 502,506