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Pension and Other Postretirement Benefits - Net Periodic Pension and Other Postretirement Benefit Costs (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Other Postretirement Benefit Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 27 $ 41 $ 69 $ 84
Interest cost $ 86 $ 83 $ 176 $ 181
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Amortization of prior service cost (credit) $ (256) $ (256) $ (512) $ (512)
Amortization of actuarial (gain) loss $ (81) $ (76) $ (159) $ (157)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Net benefit expense (income) $ (224) $ (208) $ (426) $ (404)
U.S. [Member] | Defined Benefit Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 2 10 9 20
Interest cost $ 2,223 $ 2,328 $ 4,472 $ 4,657
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Expected return on plan assets $ (2,769) $ (3,401) $ (5,640) $ (6,802)
Amortization of prior service cost (credit) 0 1 0 1
Amortization of actuarial (gain) loss $ (55) $ 46 $ 87 $ 91
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Net benefit expense (income) $ (599) $ (1,016) $ (1,072) $ (2,033)
Foreign Defined Benefits Pension Plans [Member] | Defined Benefit Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 34 8 60 39
Interest cost $ 484 $ 452 $ 941 $ 908
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Expected return on plan assets $ (556) $ (475) $ (1,081) $ (953)
Amortization of prior service cost (credit) (74) (70) (144) (141)
Amortization of actuarial (gain) loss $ 208 $ 181 $ 405 $ 361
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Net benefit expense (income) $ 96 $ 96 $ 181 $ 214