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Stock Based Compensation Additional - (Details) - Class A Common Stock - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 29, 2016
Oct. 31, 2015
Oct. 29, 2016
Oct. 31, 2015
Jan. 30, 2016
Restricted Stock          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unrecognized Compensation Expense $ 13,967,000   $ 13,967,000   $ 12,214,000
Remaining Weighted-Average Vesting Period     2 years 8 months 12 days   2 years 7 months 6 days
Compensation Expense $ 1,145,000 $ 1,040,000 $ 2,948,000 $ 2,981,000  
Employee Stock Purchase Plan          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Shares Sold     16,071 15,245  
Compensation Expense     $ 82,000 $ 80,000  
Employee Stock Purchase Plan Share Purchase Discount $ 5.12 $ 5.27 $ 5.12 $ 5.27