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Note 19 - Post-retirement Benefits - Changes in Present Value of Defined Benefit Obligations (Details) - Pension Plan [Member] - UNITED KINGDOM - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Opening balance $ (148,167) $ (135,182)  
Current service cost (347) (350) $ (357)
Interest cost (6,507) (6,177) (4,307)
Actuarial gain (loss) on liabilities 2,655 (6,848) 81,772
Exchange differences 2,689 (6,905)  
Benefits paid 7,031 7,295  
Ending balance $ (142,646) $ (148,167) $ (135,182)