Income Taxes - Liability For Uncertain Tax Positions (Details) - USD ($) $ in Thousands	Jul. 30, 2017	Jan. 29, 2017
Income Tax Contingency [Line Items]
Liability for UTP	$ 11,509	$ 11,452
Non-current deferred tax asset [Member]
Income Tax Contingency [Line Items]
Liability for UTP	9,313	9,309
Other long-term liabilities [Member]
Income Tax Contingency [Line Items]
Liability for UTP	$ 2,196	$ 2,143