Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 205,021	$ 182,761
Less accumulated depreciation	(102,393)	(86,627)
Property and equipment, net	102,628	96,134
Computer Equipment and Purchased Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	16,567	15,524
Employee Related Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	43,504	32,230
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	20,352	20,180
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	93,626	90,070
Internal Use Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	29,160	20,616
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,812	$ 4,141