v3.26.1
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, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
UNITED STATES | Pension Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 116 128 232 256
Expected return on plan assets 0 0 0 0
Amortization of prior service cost credit and recognized actuarial gain (loss) 44 36 88 70
Net periodic benefit cost 160 164 320 326
UNITED STATES | Other Postretirement Benefits Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost 4 5 8 10
Interest cost 129 144 258 288
Amortization of prior service cost credit and recognized actuarial gain (loss) (502) (644) (1,004) (1,288)
Net periodic benefit cost (369) (495) (738) (990)
Non-U.S. | Pension Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost 643 621 1,290 1,207
Interest cost 1,274 1,214 2,555 2,356
Expected return on plan assets (217) (204) (437) (401)
Amortization of prior service cost credit and recognized actuarial gain (loss) (181) 1 (363) 4
Net periodic benefit cost 1,519 1,632 3,045 3,166
Non-U.S. | Other Postretirement Benefits Plan        
Pension Plans, Postretirement and Other Employee Benefits [Line Items]        
Service cost 55 72 110 141
Interest cost 195 188 392 369
Amortization of prior service cost credit and recognized actuarial gain (loss) (1) 3 (2) 6
Net periodic benefit cost $ 249 $ 263 $ 500 $ 516