Income Taxes - Liability For Uncertain Tax Positions (Details) - USD ($) $ in Thousands	Jul. 29, 2018	Jan. 28, 2018
Income Tax Contingency [Line Items]
Liability for UTP	$ 16,914	$ 16,059
Non-current deferred tax asset [Member]
Income Tax Contingency [Line Items]
Liability for UTP	12,236	12,135
Other long-term liabilities [Member]
Income Tax Contingency [Line Items]
Liability for UTP	$ 4,678	$ 3,924