Fair Value Measurements (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 30, 2016
USD ($)
stores
Aug. 01, 2015
USD ($)
Jul. 30, 2016
USD ($)
stores
Aug. 01, 2015
USD ($)
Jan. 30, 2016
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Impairment charge $ 829 $ 0 $ 829 $ 0  
Number of stores impaired during the period | stores 2   2    
Level 1 [Member] | Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Money market funds $ 77,481   $ 77,481   $ 152,069
Level 2 [Member] | Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Money market funds 0   0   0
Level 3 [Member] | Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Money market funds $ 0   $ 0   $ 0