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ASSET RETIREMENT OBLIGATIONS Asset Retirement Obligations Level 3 (Tables)
12 Months Ended
Dec. 31, 2023
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): 
 20232022
Balance at beginning of year$37,557 $36,698 
Accretion expense1,176 1,106 
Revisions in estimated cash flows11,348 1,412 
Liability settled(1,084)(1,659)
Balance at end of year$48,997 $37,557