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Property and Equipment (Details) - USD ($)
$ in Thousands
Aug. 01, 2015
Jan. 31, 2015
Property Plant And Equipment [Line Items]    
Total property and equipment, gross $ 94,141 $ 74,727
Less accumulated depreciation and amortization (25,039) (20,410)
Total property and equipment, net 69,102 54,317
Furniture, fixtures, and equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment, gross 37,591 32,678
Leasehold improvements    
Property Plant And Equipment [Line Items]    
Total property and equipment, gross 40,650 34,398
Construction in progress    
Property Plant And Equipment [Line Items]    
Total property and equipment, gross $ 15,900 $ 7,651