Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Jan. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 232,155	$ 189,117
Tax credit carryover	76,209	50,848
Accruals and reserves	11,489	12,506
Deferred revenue	60,473	43,579
Stock-based compensation expense	31,906	31,743
Depreciation and amortization	18,893	23,545
Charitable contribution carryforwards	2,835	2,850
ASC 842 lease liabilities	25,197
Other	0	81
Total deferred tax assets	459,157	354,269
Valuation allowance	(385,791)	(307,475)
Total deferred tax assets, net of valuation allowance	73,366	46,794
Deferred tax liabilities:
Deferred commissions	(30,628)	(27,537)
Convertible debt	(11,226)	(14,230)
ASC 842 right-of-use assets	(23,502)
Acquired intangibles and goodwill	(10,421)	(3,967)
Other	(1,729)	0
Total deferred tax liabilities	(77,506)	(45,734)
Net deferred tax assets (liabilities)	$ (4,140)
Net deferred tax assets (liabilities)		$ 1,060