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Stock-Based Compensation (Details) (USD $)
3 Months Ended
Apr. 28, 2012
Apr. 30, 2011
Stock-based compensation expense by type [Abstract]    
Stock options $ 708,000 $ 406,000
Restricted stock awards 1,890,000 1,394,000
Employee stock purchase 18,000 26,000
Director deferred compensation 0 15,000
Total stock-based compensation expense 2,616,000 1,841,000
Income tax benefit recognized 977,000 676,000
Stock-based compensation expense, net of income tax 1,639,000 1,165,000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares of common stock purchased during the period under the employee stock purchase plan (in shares) 3,097 3,239
Weighted-average grant date fair value of stock options granted (in dollars per share) $ 19.32 $ 12.65
Grant date fair value of shares purchased through the employee stock purchase plan (in dollars per share) $ 7.25 $ 7.91
Purchase price paid for stock purchased through the employee stock purchase plan (in dollars per share) $ 38.40 $ 30.44
Total compensation costs related to nonvested restricted stock unit awards not yet recognized $ 11,900,000  
Weighted-average period over which nonvested restricted stock unit awards are expected to be recognized (in years) 2.88  
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options granted 36,666,000 32,093,000
Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Awarded 63,516,000 102,143,000
Performance-based Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Awarded 38,100,000 53,000,000
Deferred Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Awarded 0 419,000