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Note 9 - Accounting for Share-based Compensation (Tables)
 12 Months Ended
Dec. 01, 2018
Notes Tables  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
   
2018
    
2017
    
2016
  
Expected life (in years)
  
 
 
 
4.75
      
 
 
4.75
      
 
 
4.75
  
Weighted-average expected volatility
  
 
 
 
23.31
%
    
 
 
24.17
 %    
 
 
28.95
 %
Expected volatility range
  
 
23.18%
-
23.58
%
    
23.48%
-
24.88
 %    
24.86%
-
29.23
 %
Risk-free interest rate
  
 
2.38%
-
2.95
%
    
1.80%
-
1.99
 %    
0.96%
-
1.44
 %
Weighted-average expected dividend    
 
 
1.14
%
    
 
 
1.07
 %    
 
 
1.54
 %
Expected dividend yield range
  
 
1.12%
-
1.24
%
    
1.02%
-
1.16
 %    
1.20%
-
1.56
 %
Weighted-average fair value of grants
  
$
 
 
11.38
     $
 
 
11.49
     $
 
 
7.75
  
Share-based Compensation, Stock Options, Activity [Table Text Block]
   
 
 
 
  
Weighted-
  
   
 
 
 
  
Average
  
   
Options
    
Exercise Price
  
Outstanding at November 28, 2015
    
2,912,073
     $
30.37
  
Granted
    
853,516
      
33.98
  
Exercised
    
(593,891
 )    
24.38
  
Forfeited or cancelled
    
(185,217
 )    
39.91
  
Outstanding at December 3, 2016
    
2,986,481
     $
34.92
  
Granted
    
1,493,133
      
53.97
  
Exercised
    
(514,064
 )    
34.51
  
Forfeited or cancelled
    
(104,786
 )    
37.20
  
Outstanding at December 2, 2017
    
3,860,764
     $
42.28
  
                 
Granted
    
818,537
      
53.06
  
Exercised
    
(198,849
 )    
31.37
  
Forfeited or cancelled
    
(14,346
 )    
48.62
  
Outstanding at December 1, 2018
  
 
4,466,106
    
$
44.72
  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
   
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
Weighted-
  
   
 
 
 
  
 
 
 
  
 
 
 
  
Weighted-
    
Average
  
   
 
 
 
  
 
 
 
  
 
 
 
  
Average
    
Remaining
  
   
 
 
 
  
 
 
 
  
 
 
 
  
Grant
    
Contractual
  
   
 
 
 
  
 
 
 
  
 
 
 
  
Date Fair
    
Life
  
   
Units
    
Shares
    
Total
    
Value
    
(in Years)
  
Nonvested at November 28, 2015
    
237,013
      
110,160
      
347,173
     $
42.17
      
0.8
  
Granted
    
253,515
      
-
      
253,515
      
35.40
      
1.3
  
Vested
    
(104,828
 )    
(73,028
 )    
(177,856
 )    
41.91
      
-
  
Forfeited
    
(32,956
 )    
(179
 )    
(33,135
 )    
38.40
      
1.5
  
Nonvested at December 3, 2016
    
352,744
      
36,953
      
389,697
     $
38.36
      
1.0
  
Granted
    
287,684
      
-
      
287,684
      
50.05
      
1.2
  
Vested
    
(156,152
 )    
(36,953
 )    
(193,105
 )    
39.92
      
-
  
Forfeited
    
(22,035
 )    
-
      
(22,035
 )    
39.67
      
1.1
  
Nonvested at December 2, 2017
    
462,241
      
-
      
462,241
     $
44.80
      
1.0
  
Granted
  
 
165,909
    
 
-
    
 
165,909
    
 
45.92
    
 
2.2
  
Vested
  
 
(209,137
)
  
 
-
    
 
(209,137
)
  
 
40.38
    
 
-
  
Forfeited
  
 
(4,660
)
  
 
-
    
 
(4,660
)
  
 
47.27
    
 
1.1
  
Nonvested at December 1, 2018
  
 
414,353
    
 
-
    
 
414,353
    
$
47.45
    
 
1.0
  
Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table Text Block]
   
Non-employee
    
 
 
 
  
 
 
 
   
Directors
    
Employees
    
Total
  
Units outstanding November 28, 2015
    
380,170
      
45,906
      
426,076
  
Participant contributions
    
23,900
      
4,908
      
28,808
  
Company match contributions
1
    
20,576
      
491
      
21,067
  
Payouts
    
(327
 )    
(10,189
 )    
(10,516
 )
Units outstanding December 3, 2016
    
424,319
      
41,116
      
465,435
  
Participant contributions
    
16,051
      
5,567
      
21,618
  
Company match contributions
1
    
17,343
      
557
      
17,900
  
Payouts
    
(14,143
 )    
(15,634
 )    
(29,777
 )
Units outstanding December 2, 2017
    
443,570
      
31,606
      
475,176
  
                         
Participant contributions
  
 
16,164
    
 
7,589
    
 
23,753
  
Company match contributions
1
  
 
20,053
    
 
759
    
 
20,812
  
Payouts
  
 
-
    
 
(10,219
)
  
 
(10,219
)
Units outstanding December 1, 2018
  
 
479,787
    
 
29,735
    
 
509,522