Income and Other Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands	Feb. 03, 2017	Jan. 29, 2016
Deferred tax assets:
Deferred revenue	$ 6,232	$ 5,231
Provision for doubtful accounts	2,377	874
Credit carryforwards	0	480
Loss carryforwards	2,806	18,509
Stock-based and deferred compensation	9,568	6,443
Deferred tax assets	20,983	31,537
Valuation allowance	(2,806)	(2,438)
Deferred tax assets, net of valuation allowance	18,177	29,099
Deferred tax liabilities:
Property and equipment	(1,367)	(192)
Purchased intangible assets	(97,836)	(107,901)
Operating and compensation related accruals	(3,933)	(7,855)
Other	(29)	(732)
Deferred tax liabilities	(103,165)	(116,680)
Net deferred tax liabilities	$ (84,988)	$ (87,581)