Stockholders' Equity - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 48,142	$ 47,497	$ 93,447	$ 92,183
Provision for income taxes	(13,798)	(18,802)	(26,791)	(29,890)
Total stock-based compensation, net of income taxes	34,344	28,695	66,656	62,293
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	5,793	5,553	11,362	10,849
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	12,044	10,926	24,101	21,435
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	15,740	16,749	30,791	32,708
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 14,565	$ 14,269	$ 27,193	$ 27,191

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

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