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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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Domestic Plans | Pension Plans        
Net periodic benefit cost:        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 142 201 350 402
Expected return on plan assets (67) (57) (130) (114)
Amortization of prior service credit (431) (10) (441) (20)
Recognized net actuarial loss (gain) 5,970 79 6,033 158
Net periodic benefit cost 5,614 213 5,812 426
Domestic Plans | Postretirement Benefit Plans        
Net periodic benefit cost:        
Service cost 6 6 11 12
Interest cost 107 91 216 182
Expected return on plan assets 0 0 0 0
Amortization of prior service credit 9 19 17 38
Recognized net actuarial loss (gain) (56) (38) (80) (76)
Net periodic benefit cost 66 78 164 156
Foreign Pension Plans        
Net periodic benefit cost:        
Service cost 0 50 0 101
Interest cost 75 77 147 155
Expected return on plan assets (52) (79) (102) (159)
Amortization of prior service credit 11 0 21 0
Recognized net actuarial loss (gain) 5 23 12 47
Net periodic benefit cost $ 39 $ 71 $ 78 $ 144