Restructuring - Summary of Restructuring Liability (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	$ 5,151	$ 7,187	$ 6,065
Additions, charged to restructuring expenses	636	1,534	3,766
Change in estimate	(352)	(2,132)
Cash payments	(1,122)	(1,459)	(2,134)
Non-cash utilization	(122)	(200)	(242)
Currency translation		221	(268)
Currency translation and other	92
Balance, end of period	4,283	5,151	7,187
Employee Separation Costs
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	5,116	7,058	5,994
Additions, charged to restructuring expenses	514	1,301	3,302
Change in estimate	(334)	(2,132)
Cash payments	(1,069)	(1,286)	(1,932)
Currency translation		175	(306)
Currency translation and other	56
Balance, end of period	4,283	5,116	7,058
Accelerated Depreciation Charges
Restructuring Cost And Reserve [Line Items]
Additions, charged to restructuring expenses	122	200	242
Non-cash utilization	(122)	(200)	(242)
Other Restructuring
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	35	129	71
Additions, charged to restructuring expenses		33	222
Change in estimate	(18)
Cash payments	(53)	(173)	(202)
Currency translation		46	38
Currency translation and other	$ 36
Balance, end of period		$ 35	$ 129