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Earnings Per Share (Details)
3 Months Ended 9 Months Ended
Aug. 27, 2011
Aug. 28, 2010
Aug. 27, 2011
Aug. 28, 2010
Earnings Per Share Reconciliation [Line Items]        
Weighted-average common shares - basic 48,999,938 48,594,685 49,008,971 48,552,383
Equivalent Shares From Share Based Compensations Plans 916,771 990,790 872,183 1,011,966
Weighted-average common and common equivalent shares - diluted 49,916,709 49,585,475 49,881,154 49,564,349
Stock Options To Purchase Shares At The Weighted Average Exercise Price Of $22.03 [Member]
       
Earnings Per Share Antidilutive Shares [Abstract]        
Antidilutive shares not used in calculating diluted earnings per share calculations 1,266,273      
Stock Options To Purchase Shares At The Weighted Average Exercise Price Of $23.37 [Member]
       
Earnings Per Share Antidilutive Shares [Abstract]        
Antidilutive shares not used in calculating diluted earnings per share calculations   1,204,526    
Stock Options To Purchase Shares At The Weighted Average Exercise Price Of $23.87 [Member]
       
Earnings Per Share Antidilutive Shares [Abstract]        
Antidilutive shares not used in calculating diluted earnings per share calculations     1,017,460  
Stock Options To Purchase Shares At The Weighted Average Exercise Price Of $23.34 [Member]
       
Earnings Per Share Antidilutive Shares [Abstract]        
Antidilutive shares not used in calculating diluted earnings per share calculations       1,197,234