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Retirement and Pension Plans - Components of Net Periodic Pension Benefit Expense (Income) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Defined benefit plans:        
Service cost $ 1,979 $ 1,678 $ 5,858 $ 5,093
Interest cost 5,657 6,677 16,893 20,179
Expected return on plan assets (13,681) (13,061) (40,889) (39,272)
Amortization of net actuarial loss and other 4,008 3,902 11,915 11,838
Pension income (2,037) (804) (6,223) (2,162)
Other plans:        
Defined contribution plans 7,068 7,614 23,975 24,876
Foreign plans and other 1,934 3,816 5,807 6,921
Total other plans 9,002 11,430 29,782 31,797
Total net pension expense $ 6,965 $ 10,626 $ 23,559 $ 29,635