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.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring - Schedule of Components of Restructuring Expense by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	$ 1,903	$ 1,195	$ 3,648	$ 4,658	$ 6,014
United States [Member]
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	448	1,116	2,191	1,941
International [Member]
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	$ 1,455	$ 79	$ 1,457	$ 2,717