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Retirement Benefit Plans (Fair Value Hierarchy) (Details) - Pension Plan - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Fair value of each major category of U.S. plan assets $ 28,251 $ 30,128 $ 34,485
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of each major category of U.S. plan assets 28,251 30,128  
Level 1 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of each major category of U.S. plan assets 28,028 29,866  
Level 1 | Money market funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of each major category of U.S. plan assets 223 181  
Level 1 | Cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of each major category of U.S. plan assets $ 0 $ 81