v3.26.1
Asset Retirement Obligations (Tables)
3 Months Ended
Mar. 31, 2026
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Reconciliation of Beginning and Ending Aggregate Carrying Amount of Asset Retirement Obligations
A reconciliation of the beginning and ending aggregate carrying amount of the ARO for the three-month periods ended March 31, 2026 and 2025 are shown in the following table.
(Thousands of dollars)March 31, 2026March 31, 2025
Balance at beginning of year$1,012,867 $1,008,884 
Accretion14,514 14,045 
Liabilities incurred10,064 4,996 
Revisions of previous estimates 3,999 
Liabilities settled(8,941)(157)
Changes due to translation of foreign currencies(2,371)394 
Balance at end of period1,026,133 1,032,161 
Current portion of liability
(53,630)(77,452)
Non-current portion of liability$972,503 $954,709