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Pensions and Other Postretirement Benefits (Components of Net Periodic Cost of Pension and Other Postretirement Benefit Plans) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Net periodic benefit cost $ 52 $ 241 $ 468
Pension Plans | United States      
Defined Benefit Plan Disclosure [Line Items]      
Annual service cost 0 0 0
Interest cost 97 65 57
Expected return on plan assets 0 0 0
Amortization of actuarial losses 0 22 27
Amortization of prior service cost 0 0 0
Amortization of transition obligation 0 0 0
Curtailment and settlement losses 0 0 0
Net periodic benefit cost 97 87 84
Pension Plans | Foreign Plan      
Defined Benefit Plan Disclosure [Line Items]      
Annual service cost 265 308 379
Interest cost 675 395 353
Expected return on plan assets (879) (454) (393)
Amortization of actuarial losses 39 736 459
Amortization of prior service cost (10) 0 0
Amortization of transition obligation 0 (40) (8)
Curtailment and settlement losses 50 (512) (108)
Net periodic benefit cost 140 433 682
OPEB Plans      
Defined Benefit Plan Disclosure [Line Items]      
Annual service cost 17 29 36
Interest cost 111 67 68
Amortization of actuarial losses (22) 3 20
Net periodic benefit cost $ 106 $ 99 $ 124