Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 182,761	$ 168,526
Less accumulated depreciation	(86,627)	(67,403)
Property and equipment, net	96,134	101,123
Computer Equipment and Purchased Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	15,524	15,128
Employee Related Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	32,230	20,802
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	20,180	20,204
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	90,070	89,850
Internal Use Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	20,616	12,528
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 4,141	$ 10,014