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Pension and Postretirement Benefits - Components of Net Periodic Benefit Cost of Pension and Postretirement Benefit Plans (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Pension Plans        
Net periodic benefit cost:        
Net periodic benefit cost (income) $ 281 $ 261 $ 707 $ 729
Total expenses (income) 281 261 707 729
Postretirement Benefit Plans        
Net periodic benefit cost:        
Net periodic benefit cost (income) (42) 43 114 211
Total expenses (income) (42) 43 114 211
Domestic Plans | Pension Plans        
Net periodic benefit cost:        
Service cost 0 0 0 0
Interest cost 206 212 608 634
Expected return on plan assets (7) (15) (121) (95)
Amortization of prior service credit (9) (13) (29) (29)
Recognized net actuarial loss (gain) 91 77 249 219
Net periodic benefit cost (income) 281 261 707 729
Settlement cost 0 0 0 0
Total expenses (income) 281 261 707 729
Domestic Plans | Postretirement Benefit Plans        
Net periodic benefit cost:        
Service cost 7 4 19 16
Interest cost 78 74 260 260
Expected return on plan assets 0 0 0 0
Amortization of prior service credit 18 27 56 85
Recognized net actuarial loss (gain) (145) (62) (221) (150)
Net periodic benefit cost (income) (42) 43 114 211
Settlement cost 0 0 0 0
Total expenses (income) (42) 43 114 211
Foreign Pension Plans        
Net periodic benefit cost:        
Service cost 51 44 152 132
Interest cost 84 94 254 277
Expected return on plan assets (83) (87) (250) (259)
Amortization of prior service credit 0 0 0 0
Recognized net actuarial loss (gain) 32 35 95 102
Net periodic benefit cost (income) 84 86 251 252
Settlement cost 0 0 0 0
Total expenses (income) 84 86 251 252
Foreign Pension Plans | Pension Plans        
Net periodic benefit cost:        
Net periodic benefit cost (income) 84 86 251 252
Total expenses (income) $ 84 $ 86 $ 251 $ 252