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Note 19 - Post-retirement Benefits - Actuarial Gain (Loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Actuarial gain (loss) on defined benefit plans $ 7,440 $ 22,345 $ (9,356)
Pension Plan [Member] | UNITED KINGDOM      
Actuarial (loss) gain on assets (74,332) 11,378 16,678
Actuarial gain (loss) on liabilities 81,772 10,967 (26,034)
Actuarial gain (loss) on defined benefit plans $ 7,440 $ 22,345 $ (9,356)