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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
Mar. 31, 2022
Mar. 31, 2021
Pension Plans    
Net periodic benefit cost:    
Net periodic benefit cost $ 372 $ 238
Total expenses 372 238
Postretirement Benefit Plans    
Net periodic benefit cost:    
Net periodic benefit cost 109 123
Total expenses 109 123
Domestic Plans | Pension Plans    
Net periodic benefit cost:    
Service cost
Interest cost 125 114
Expected return on plan assets (2) (27)
Amortization of prior service credit
Recognized net actuarial (gain) loss 134 151
Net periodic benefit cost 257 238
Settlement cost 115
Total expenses 257 238
Domestic Plans | Postretirement Benefit Plans    
Net periodic benefit cost:    
Service cost 10 13
Interest cost 54 55
Expected return on plan assets
Amortization of prior service credit 22 (1)
Recognized net actuarial (gain) loss 23 56
Net periodic benefit cost 109 123
Settlement cost
Total expenses 109 123
Foreign Pension Plans    
Net periodic benefit cost:    
Service cost 85 113
Interest cost 88 76
Expected return on plan assets (125) (125)
Amortization of prior service credit
Recognized net actuarial (gain) loss 35 49
Net periodic benefit cost 83 113
Settlement cost 533
Total expenses 83 113
Foreign Pension Plans | Pension Plans    
Net periodic benefit cost:    
Net periodic benefit cost 616 113
Total expenses $ 616 $ 113