Restructuring - Schedule of Components of Restructuring Expense by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	$ 6,229	$ 6,014	$ 7,261
United States [Member]
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	2,234	3,336	7,120
International [Member]
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	$ 3,995	$ 2,678	$ 141

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration