v3.26.1
ASSET RETIREMENT OBLIGATION (Schedule of Changes to Asset Retirement Obligation) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Asset Retirement Obligation Disclosure [Abstract]          
Asset retirement obligation, at beginning of period $ 39,228 $ 33,241 $ 38,452 $ 32,592  
Liabilities settled (75) 0 (75) 0  
Accretion of discount 777 650 1,553 1,299  
Total asset retirement obligation, at end of period 39,930 33,891 39,930 33,891 $ 38,452
Less current portion of asset retirement obligation 0 (595) 0 (595)  
Long-term portion of asset retirement obligation $ 39,930 $ 33,296 $ 39,930 $ 33,296 $ 38,452