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Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	Oct. 29, 2017	Jan. 29, 2017
Property, Plant and Equipment [Line Items]
Property and equipment	$ 85,462	$ 56,325
Accumulated depreciation and amortization	(20,581)	(15,529)
Property and equipment net excluding construction in progress	64,881	40,796
Property and equipment, net	98,151	52,432
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	3,055	2,986
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	19,938	12,752
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	26,882	16,178
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	177	177
Warehouse Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	5,789	3,939
Office Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	19,102	11,125
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	3,300	2,509
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	7,219	6,659
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 33,270	$ 11,636

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