Income Taxes - Schedule of Deferred Tax and Related Valuation Allowance (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Accrued bonus	$ 25,487	$ 24,093
Deferred revenue	3,874	4,188
Deferred rent	0	11,245
Operating lease liability	147,375
Stock-based compensation	20,606	20,345
NOLs	25,851	15,743
Unrealized losses	1,529	1,039
Tax credit carryforwards	87,305	70,235
License income	0	2,245
Convertible senior notes interest	22,506	4,724
Other	12,501	11,759
Deferred tax assets	347,034	165,616
Depreciation and amortization	(16,896)	(23,912)
Acquired intangible assets	(51,758)	(45,773)
Operating lease ROU asset	(132,949)
Deferred commissions	(14,843)	(14,232)
Internal-use software development costs capitalized	(57,201)	(63,586)
Deferred tax liabilities	(273,647)	(147,503)
Valuation allowance	(26,046)	(2,824)
Net deferred tax assets	$ 47,341	$ 15,289