Restructuring - Summary of Restructuring Activity for All Restructuring Initiatives (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	$ 6,065	$ 2,547
Additions, charged to restructuring expenses	8,203	12,919
Change in estimate	(2,400)
Cash payments	(5,809)	(6,754)
Non-cash utilization	(687)	(2,512)
Reclassification to lease liability		(112)
Currency translation	255	(23)
Balance, end of period	5,627	6,065
Employee Separation Costs
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	5,994	2,079
Additions, charged to restructuring expenses	6,932	8,056
Change in estimate	(2,382)
Cash payments	(5,052)	(4,118)
Currency translation	135	(23)
Balance, end of period	5,627	5,994
Accelerated Depreciation and Impairment
Restructuring Cost And Reserve [Line Items]
Additions, charged to restructuring expenses	687	2,512
Non-cash utilization	(687)	(2,512)
Other Restructuring
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	71	468
Additions, charged to restructuring expenses	584	2,351
Change in estimate	(18)
Cash payments	(757)	(2,636)
Reclassification to lease liability		(112)
Currency translation	$ 120
Balance, end of period		$ 71