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Asset Retirement Obligations
9 Months Ended
Sep. 30, 2025
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations
Note G – Asset Retirement Obligations
The asset retirement obligations liabilities (ARO) recognized by the Company are related to the estimated costs to dismantle and abandon its producing oil and natural gas properties and related equipment.
A reconciliation of the beginning and ending aggregate carrying amount of the ARO for the nine-month periods ended September 30, 2025 and 2024 are shown in the following table.
(Thousands of dollars)September 30, 2025September 30, 2024
Balance at beginning of year$1,008,884 $914,763 
Accretion43,153 39,068 
Liabilities incurred14,267 17,975 
Revisions of previous estimates7,489 2,452 
Liabilities settled(32,145)(1,982)
Changes due to translation of foreign currencies6,147 (2,618)
Balance at end of period1,047,795 969,658 
Current portion of liability
(45,876)(39,693)
Non-current portion of liability$1,001,919 $929,965 
The estimation of future ARO is based on a number of assumptions requiring professional judgment. The Company cannot predict the type of revisions to these assumptions that may be required in future periods due to the availability of additional information such as: prices for oil field services, technological changes, governmental requirements and other factors.