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Accounting for Sharebased Compensation (Details) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 31, 2014
Jun. 01, 2013
May 31, 2014
Jun. 01, 2013
May 31, 2014
Non Employee Directors [Member]
May 31, 2014
Non Employee Directors [Member]
May 31, 2014
Employees [Member]
May 31, 2014
Employees [Member]
May 31, 2014
Nonvested restricted stock units [Member]
May 31, 2014
Nonvested restricted stock shares [Member]
May 31, 2014
Weighted-Average Grant Date Fair Value [Member]
May 31, 2014
Weighted-Average Grant Date Fair Value [Member]
May 31, 2014
Nonvested restricted stock weighted-average remaining contractual life (in years) [Member]
Nov. 30, 2013
Nonvested restricted stock weighted-average remaining contractual life (in years) [Member]
Assumptions to calculate fair value options [Abstract]                            
Expected life 4 years 9 months 4 years 9 months 4 years 9 months 4 years 9 months                    
Weighted-average expected volatility 32.70% 47.65% 34.17% 48.00%                    
Expected volatility 32.70% 47.65%                        
Expected volatility (Low)     32.70% 47.65%                    
Expected volatility (High)     37.06% 48.02%                    
Risk-free interest rate 1.64% 0.69% 1.51% 0.73%                    
Expected dividend yield 0.84% 1.04% 0.82% 0.87%                    
Weighted-average fair value of grants $ 13.33 $ 14.27 $ 14.21 $ 15.09                    
Nonvested Restricted Activity [Line Items]                            
Nonvested beginning balance     447,676           135,231 312,445   33.76    
Granted     124,387           124,387 0        
Vested     (177,202)           (65,911) (111,291)        
Forfeited     (6,496)           (335) (6,161)        
Nonvested ending balance 388,365   388,365           193,372 194,993        
Weighted Average Remaining Contractual Life Beginning                         1 year 8 months 12 days 1 year 2 months 12 days
Weighted Average Remaining Contractual Life Granted                         1 year 10 months 24 days  
Weighted Average Remaining Contractual Life Forfeited                         1 year 6 months  
Weighted Average Remaining Contractual Life Vested                         0 years  
Weighted Average Remaining Contractual Life Ending                         1 year 8 months 12 days 1 year 2 months 12 days
Granted weighted average grant date fair value                     $ 48.89 $ 48.89    
Vested weighted average grant date fair value                     $ 48.2 $ 48.2    
Forfeited weighted average grant date fair value                     $ 35.43 $ 35.43    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 251,000 $ 278,000 $ 8,541,000 $ 6,550,000                    
Total fair value of nonvested restricted stock 11,413,000   11,413,000                      
Schedule Of Share Based Compensation Nonemployee Director Stock Award Plan Activity Units [Line Items]                            
Units outstanding beginning     373,968     312,680   61,288            
Participant contributions     7,768   6,556 6,556 1,212 1,212            
Company match contributions     777   656 656 121 121            
Payouts     7,555   (298) 298 (7,257) 7,257            
Units outstanding ending 374,958   374,958   319,594 319,594 55,364 55,364            
Other Share Based Activity [Abstract]                            
Fair values of options granted 106,000 277,000 5,899,000 6,823,000                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value 3,119,000 533,000 5,792,000 4,770,000                    
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options 2,646,000 597,000 4,651,000 4,371,000                    
Repurchased restricted stock shares 2,249 1,972 66,312 61,624                    
Share-based compensation expense recognition [Abstract]                            
Share-based compensation expense 3,163,000 2,895,000 7,148,000 6,215,000                    
Excess tax benefit recognized 837,000 225,000 2,450,000 2,029,000                    
Unrecognized compensation costs related to unvested stock option awards 9,717,000   9,717,000                      
The weighted average period over which unrecognized share-based compensation costs are expected to be reported.     1 year 3 months 18 days                      
Unrecognized compensation costs related to unvested restricted stock awards 5,164,000   5,164,000                      
The weighted average period over which unrecognized compensation costs related to unvested restricted stock awards     1 year 6 months 0 days                      
Restricted Unit Unrecognized Costs $ 6,249,000   $ 6,249,000                      
Sharebased Compensation Arrangement By Sharebased Payment Restrict Unit Award Weighted Average Remaining Contractual Term     1 year 4 months 24 days                      
Summary of option activity [Roll Forward]                            
Outstanding beginning balance     2,429,961                      
Granted     415,079                      
Exercised     (215,641)                      
Forfeited or Cancelled     (19,025)                      
Outstanding ending balance 2,610,374   2,610,374                      
Weighted-average exercise price activity [Abstract]                            
Outstanding beginning balance     $ 25.74                      
Granted     $ 48.9                      
Exercised     $ 21.57                      
Forfeited or Cancelled     $ 33.81                      
Outstanding ending balance $ 29.71   $ 29.71