Restructuring - Schedule of Components of Restructuring Expense by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	$ 6,014	$ 7,261	$ 274
United States [Member]
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	3,336	7,120	$ 274
International [Member]
Restructuring Cost And Reserve [Line Items]
Total restructuring expenses	$ 2,678	$ 141