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Retirement Benefit Plans (Net Periodic Benefit Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost $ 1,360 $ 1,639
Expected return on plan assets (1,641) (2,751)
Amortization of actuarial loss 270 51
Amortization of prior service cost 58 58
Settlements 0 1,815
Net periodic pension expense 47 812
Other Postretirement Benefits Plan    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost 75 77
Service cost 8 7
Amortization of actuarial loss 75 44
Amortization of prior service cost (6) (50)
Net periodic pension expense $ 152 $ 78