Segment Information - Summary of Revenue, Property and Equipment, Net by Geographic Region (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net revenues:
Revenue	[1]	$ 378,831	$ 402,874	$ 403,558
Property and equipment, net:
Property and equipment, net		43,141	22,928
United States
Net revenues:
Revenue	[1]	191,854	202,272	181,965
Property and equipment, net:
Property and equipment, net		31,017	13,301
Other countries
Net revenues:
Revenue	[1]	186,977	200,602	$ 221,593
Israel
Property and equipment, net:
Property and equipment, net		8,803	5,919
France
Property and equipment, net:
Property and equipment, net		2,461	2,615
All countries except United States, Israel and France [Member] [Member]
Property and equipment, net:
Property and equipment, net		$ 860	$ 1,093

[1] Revenue is attributed to countries based on the location of the customer.