Restructuring - Summary of Activity of Restructuring (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			$ 26,995
Restructuring charges	$ 9,774	$ 5,927	17,050	$ 23,642
Cash payments			(15,690)
Non-cash fixed asset impairments included in expense			1,168
Foreign exchange translation and other			(200)
Restructuring Reserve, Ending Balance	26,987		26,987
Employee Separation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			22,990
Restructuring charges			10,781
Cash payments			(10,213)
Non-cash fixed asset impairments included in expense			0
Foreign exchange translation and other			(280)
Restructuring Reserve, Ending Balance	23,278		23,278
Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			4,005
Restructuring charges			6,269
Cash payments			(5,477)
Non-cash fixed asset impairments included in expense			1,168
Foreign exchange translation and other			80
Restructuring Reserve, Ending Balance	$ 3,709		$ 3,709