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Segment Reporting (Schedule Of Operations By Segment) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Apr. 30, 2012
Apr. 30, 2011
Jan. 31, 2012
Segment Reporting Information [Line Items]      
Total inventories $ 299,750 $ 264,278 $ 250,073
Total property and equipment, net 711,932 601,249 684,979
Total net sales 568,930 524,019  
Total income from operations 52,915 58,836  
Retail Operations [Member]
      
Segment Reporting Information [Line Items]      
Total inventories 285,562 251,935 237,825
Total property and equipment, net 708,635 597,600 681,501
Total net sales 537,746 493,462  
Total income from operations 52,907 62,968  
Wholesale Operations [Member]
      
Segment Reporting Information [Line Items]      
Total inventories 14,188 12,343 12,248
Total property and equipment, net 3,297 3,649 3,478
Total net sales 32,579 31,583  
Total income from operations 7,994 [1] 2,958 [1]  
Intersegment Elimination [Member]
      
Segment Reporting Information [Line Items]      
Total net sales (1,395) (1,026)  
Total income from operations (146) (71)  
Total Segment Operating Income [Member]
      
Segment Reporting Information [Line Items]      
Total income from operations 60,755 65,855  
General Corporate Expenses [Member]
      
Segment Reporting Information [Line Items]      
General corporate expenses $ (7,840) $ (7,018)  
[1] Increase in Wholesale segment income from operations for the three months ended April 30, 2012 as compared to the prior year comparable period was principally due to one-time charges included in the three months ended April 30, 2011 resulting from the discontinuation of wholesale distribution of the Leifsdottir brand, which began in the first quarter of fiscal 2012.