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Stock Options and Restricted Stock - Additional Information (Detail) (USD $)
12 Months Ended
Feb. 01, 2014
Feb. 02, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of stock-based compensation plan 1  
Employee Stock Plan, 2006 Plan
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options expiration period from the date of grant 10 years  
Intrinsic value of options exercised $ 23,700   
Unrecognized stock compensation cost 12,200,000  
Shares available for future grant 1,206,540  
Options granted 2,781,938  
Employee Stock Plan, 2006 Plan | Maximum
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Increase in authorized shares 7,250,000  
Employee Stock Plan, 2006 Plan | Employees And Executives
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, vesting period 3 years  
Employee Stock Plan, 2006 Plan | Non Employee Directors
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, vesting period 2 years  
Employee Stock Plan, 2006 Plan | Awards Other than Stock Options and Stock Appreciation Rights
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares available for future grant 963,109  
Employee Stock Plan, 2006 Plan | Awards Other than Stock Options and Stock Appreciation Rights | After Amendment
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Increase in authorized shares 4,250,000  
Employee Stock Plan, 2006 Plan | Restricted Stock
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized stock compensation cost 8,100,000  
Employee Stock Plan, 2006 Plan | Performance Shares
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized stock compensation cost 4,800,000  
Employee Stock Plan, 2006 Plan | Time Based Awards
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized stock compensation cost 3,300,000  
Unrecognized stock compensation cost weighted average recognition period 27 months  
Employee Stock Plan, 1992 Plan
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Intrinsic value of options exercised $ 182,900 $ 99,400
Options granted