v3.25.2
Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2025
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 six-month periods ended June 30, 2025 and 2024 are shown in the following table.
(Thousands of dollars)June 30, 2025June 30, 2024
Balance at beginning of year$1,008,884 $914,763 
Accretion28,477 25,827 
Liabilities incurred5,428 14,199 
Revisions of previous estimates3,999 1,995 
Liabilities settled(6,359)(2,925)
Changes due to translation of foreign currencies9,784 (4,541)
Balance at end of period1,050,213 949,318 
Current portion of liability
(70,104)(25,622)
Non-current portion of liability$980,109 $923,696