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Segment Reporting (Schedule Of Operations By Segment) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2012
Jan. 31, 2011
Jan. 31, 2010
Segment Reporting Information [Line Items]      
Total net sales $ 2,473,801 $ 2,274,102 $ 1,937,815
Total income from operations 284,725 414,203 338,984
Total depreciation expense for property and equipment 100,739 92,403 86,146
Total inventories 250,073 229,561  
Total property and equipment, net 684,979 586,346  
Total cash paid for property and equipment 190,010 143,642 109,260
Retail Operations [Member]
      
Segment Reporting Information [Line Items]      
Total net sales 2,340,794 2,153,792 1,833,733
Total income from operations 276,581 418,403 338,114
Total depreciation expense for property and equipment 99,645 91,267 85,077
Total inventories 237,825 213,420  
Total property and equipment, net 681,501 582,241  
Total cash paid for property and equipment 189,311 142,791 107,941
Wholesale Operations [Member]
      
Segment Reporting Information [Line Items]      
Total net sales 140,657 124,768 109,269
Total income from operations 26,919 23,372 22,164
Total depreciation expense for property and equipment 1,094 1,136 1,069
Total inventories 12,248 16,141  
Total property and equipment, net 3,478 4,105  
Total cash paid for property and equipment 699 851 1,319
Intersegment Elimination [Member]
      
Segment Reporting Information [Line Items]      
Total net sales (7,650) (4,458) (5,187)
Total income from operations (709) (389) (202)
Total Segment Operating Income [Member]
      
Segment Reporting Information [Line Items]      
Total income from operations 302,791 441,386 360,076
General Corporate Expenses [Member]
      
Segment Reporting Information [Line Items]      
General corporate expenses $ (18,066) $ (27,183) $ (21,092)