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ASSET RETIREMENT OBLIGATIONS Asset Retirement Obligations Level 3 (Tables)
12 Months Ended
Dec. 31, 2025
Asset Retirement Obligation [Abstract]  
Schedule of Change in Asset Retirement Obligation
The following table presents the changes in the carrying amount of AROs (in thousands of dollars): 
 20252024
Balance at January 1$51,126 $48,997 
Accretion expense2,457 1,895 
Revisions in estimated cash flows21,642 842 
Liability settled(1,249)(608)
Balance at December 31$73,976 $51,126