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Retirement and Pension Plans - Components of Net Periodic Pension Benefit Expense (Income) (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Defined benefit plans:    
Service cost $ 2,021 $ 1,950
Interest cost 4,567 5,636
Expected return on plan assets (14,174) (13,650)
Amortization of net actuarial loss and other 4,353 3,976
Pension income (3,233) (2,088)
Other plans:    
Defined contribution plans 8,455 10,025
Foreign plans and other 2,234 2,041
Total other plans 10,689 12,066
Total net pension expense $ 7,456 $ 9,978