Income Taxes - Schedule of Deferred Tax and Related Valuation Allowance (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Accrued bonus	$ 25,480	$ 25,487
Deferred revenue	11,146	3,874
Operating lease liability	141,212	147,375
Stock-based compensation	23,629	20,606
NOLs	25,255	25,851
Unrealized losses	0	1,529
Tax credit carryforwards	110,254	87,305
Convertible senior notes interest	20,953	22,506
Other	11,531	12,501
Deferred tax assets	369,460	347,034
Depreciation and amortization	(6,974)	(16,896)
Acquired intangible assets	(59,128)	(51,758)
Operating lease right-of-use asset	(127,524)	(132,949)
Deferred commissions	(14,952)	(14,843)
Internal-use software development costs capitalized	(58,820)	(57,201)
Deferred tax liabilities	(267,398)	(273,647)
Valuation allowance	(32,602)	(26,046)
Net deferred tax assets	$ 69,460	$ 47,341

Deferred Tax Assets, Deferred Income, Operating Lease Liability

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Deferred Tax Assets Tax Net Operating Loss and Carryforwards

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Deferred Tax Liabilities, Depreciation and Amortization

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on available-for-sale securities.

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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