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Note 19 - Post-retirement Benefits - Analysis of Plan Assets and Expected Rate of Return (Details) - UNITED KINGDOM - Pension Plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair value of asset $ 137,725 $ 123,840 $ 212,688
DGF [Member]      
Expected rate of return 7.70% 7.50%  
Fair value of asset $ 64,023 $ 55,633  
LDI [MEmber]      
Expected rate of return 4.20% 4.00%  
Fair value of asset $ 47,283 $ 45,170  
Bond Funds [Member]      
Expected rate of return 4.40% 4.50%  
Fair value of asset $ 24,835 $ 21,899  
Defined Benefit Plan, Equity Securities [Member]      
Expected rate of return 3.70% 1.80%  
Fair value of asset $ 185 $ 188  
Defined Benefit Plan, Other Assets [Member]      
Expected rate of return 4.00% 2.20%  
Fair value of asset $ 1,399 $ 950