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Segment Reporting - Additional Information (Detail)
3 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2013
Jul. 31, 2013
Jul. 31, 2013
Retail Operations
Store
Brand
Jul. 31, 2012
Retail Operations
Jul. 31, 2013
Retail Operations
Segment
Store
Brand
Jul. 31, 2012
Retail Operations
Segment Reporting Information [Line Items]            
Number of reporting segments         2  
Number of brands     5   5  
Number of stores     491   491  
Percentage of net sales     94.00% 94.00% 94.00% 94.00%
Number of department and specialty retailers   1,400        
Percentage of sales that no customer comprises 10.00%