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Pension and Postretirement Benefits other than Pensions - Net Periodic Benefit Cost of Defined Benefit Plans and Other Postretirement Benefit Plans (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
UNITED STATES | Pension Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 128 126 256 1,945
Expected return on plan assets 0 0 0 (1,647)
Amortization of prior service cost credit and recognized actuarial gain (loss) 36 36 70 591
Defined Benefit Plan, Other Cost (Credit) 0 46,787 0 46,787
Net periodic benefit cost 164 46,949 326 47,676
UNITED STATES | Other Postretirement Benefits Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost 5 6 10 12
Interest cost 144 142 288 284
Amortization of prior service cost credit and recognized actuarial gain (loss) (644) (730) (1,288) (1,460)
Net periodic benefit cost (495) (582) (990) (1,164)
Non-U.S. | Pension Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost 621 591 1,207 1,189
Interest cost 1,214 1,199 2,356 2,411
Expected return on plan assets (204) (330) (401) (666)
Amortization of prior service cost credit and recognized actuarial gain (loss) 1 53 4 106
Defined Benefit Plan, Other Cost (Credit) 0 0 0 0
Net periodic benefit cost 1,632 1,513 3,166 3,040
Non-U.S. | Other Postretirement Benefits Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost 72 44 141 89
Interest cost 188 191 369 385
Amortization of prior service cost credit and recognized actuarial gain (loss) 3 3 6 7
Net periodic benefit cost $ 263 $ 238 $ 516 $ 481