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Pensions and Other Postretirement Benefits (Accrued Pension and Other Postretirement Costs) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Liability, defined benefit plan, noncurrent $ (7,276) $ (7,777)
Pension Plans | United States    
Defined Benefit Plan Disclosure [Line Items]    
Assets, defined benefit plan 0 0
Liability, defined benefit plan, current (140) (137)
Liability, defined benefit plan, noncurrent (1,958) (1,913)
Accumulated other comprehensive gain 196 137
Amounts recognized in consolidated balance sheets (1,902) (1,913)
Pension Plans | Foreign Plan    
Defined Benefit Plan Disclosure [Line Items]    
Assets, defined benefit plan 4,573 3,301
Liability, defined benefit plan, current (85) (179)
Liability, defined benefit plan, noncurrent (2,636) (2,727)
Accumulated other comprehensive gain 492 577
Amounts recognized in consolidated balance sheets 2,344 972
OPEB Plans    
Defined Benefit Plan Disclosure [Line Items]    
Liability, defined benefit plan, current (286) (189)
Liability, defined benefit plan, noncurrent (2,204) (2,197)
Accumulated other comprehensive gain (367) (484)
Amounts recognized in consolidated balance sheets $ (2,857) $ (2,870)