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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Fair value of asset $ 123,840 $ 212,688 $ 203,630
DGF [Member]      
Expected rate of return 7.50% 4.60%  
Fair value of asset $ 55,633 $ 123,460  
LDI [MEmber]      
Expected rate of return 4.00% 1.10%  
Fair value of asset $ 45,170 $ 61,163  
Bond Funds [Member]      
Expected rate of return 4.50% 1.80%  
Fair value of asset $ 21,899 $ 26,571  
Defined Benefit Plan, Equity Securities [Member]      
Expected rate of return 1.80% 1.50%  
Fair value of asset $ 188 $ 360  
Defined Benefit Plan, Other Assets [Member]      
Expected rate of return 2.20% 1.50%  
Fair value of asset $ 950 $ 1,134