Stockholders' Equity - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 46,815	$ 46,632	$ 140,262	$ 138,815
Provision for income taxes	(14,867)	(7,802)	(41,658)	(37,692)
Total stock-based compensation, net of income taxes	31,948	38,830	98,604	101,123
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	5,555	5,494	16,917	16,343
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	12,842	11,249	36,943	32,684
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	15,593	16,835	46,384	49,543
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 12,825	$ 13,054	$ 40,018	$ 40,245

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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