Employee Benefits - Pension and Other Defined Contribution Retirement Plan Expenses (Detail) - Pension Plans - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 474	$ 596	$ 1,422	$ 1,788
Interest cost on projected benefit obligation	5,453	4,790	16,359	14,370
Expected return on plan assets	(6,983)	(7,740)	(20,949)	(23,219)
Net amortization and deferrals	1,276	1,549	3,827	4,647
Net periodic benefit (income) cost	220	(805)	659	(2,414)
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	4,873	4,470	14,619	13,410
Interest cost on projected benefit obligation	4,435	4,338	13,305	13,014
Expected return on plan assets	(10,904)	(12,032)	(32,712)	(36,096)
Net amortization and deferrals	2,922	2,972	8,766	8,916
Net periodic benefit (income) cost	$ 1,326	$ (252)	$ 3,978	$ (756)