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Retirement and Pension Plans - Components of Net Periodic Pension Benefit Expense (Income) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Defined benefit plans:        
Service cost $ 1,929 $ 1,702 $ 3,879 $ 3,415
Interest cost 5,600 6,740 11,236 13,502
Expected return on plan assets (13,558) (13,085) (27,208) (26,211)
Amortization of net actuarial loss and other 3,931 4,649 7,907 7,936
Pension (income) expense (2,098) 6 (4,186) (1,358)
Other plans:        
Defined contribution plans 6,882 8,154 16,907 17,262
Foreign plans and other 1,832 1,543 3,873 3,105
Total other plans 8,714 9,697 20,780 20,367
Total net pension expense $ 6,616 $ 9,703 $ 16,594 $ 19,009