Employee Benefits - Pension and Other Defined Contribution Retirement Plan Expenses (Detail) - Pension Plans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 400	$ 474	$ 800	$ 948
Interest cost on projected benefit obligation	4,263	5,453	8,526	10,906
Expected return on plan assets	(7,083)	(6,983)	(14,166)	(13,966)
Net amortization and deferrals	1,858	1,276	3,716	2,551
Net periodic benefit (income) cost	(562)	220	(1,124)	439
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	5,940	4,873	11,880	9,746
Interest cost on projected benefit obligation	3,246	4,435	6,491	8,870
Expected return on plan assets	(11,614)	(10,904)	(23,228)	(21,808)
Net amortization and deferrals	3,834	2,922	7,668	5,844
Net periodic benefit (income) cost	$ 1,406	$ 1,326	$ 2,811	$ 2,652