Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Property and Equipment [Line Items]
Property and equipment, gross		$ 925,451		$ 685,829
Less: Accumulated depreciation		(457,366)		(338,613)
Property and equipment, net	[1]	468,085		347,216
Computer equipment
Property and Equipment [Line Items]
Property and equipment, gross		680,160		493,536
Computer software
Property and Equipment [Line Items]
Property and equipment, gross		59,511		58,303
Leasehold and other improvements
Property and Equipment [Line Items]
Property and equipment, gross		125,299		74,721
Furniture and fixtures
Property and Equipment [Line Items]
Property and equipment, gross		53,651		42,551
Building
Property and Equipment [Line Items]
Property and equipment, gross		0		6,551
Construction in progress
Property and Equipment [Line Items]
Property and equipment, gross		$ 6,830		$ 10,167
Accounting Standards Update 2016-02 | Construction in progress
Property and Equipment [Line Items]
Property and equipment, gross			$ (10,600)

[1] We adopted Topic 842 using the modified retrospective method as of January 1, 2019 and elected the transition option that allows us not to restate the comparative periods in our consolidated financial statements in the year of adoption. Refer to Note 2 for further details.