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Note 3 - Accounting for Share-based Compensation (Tables)
 12 Months Ended
Dec. 03, 2016
Notes Tables  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
 
 
2016
 
 
2015
 
 
2014
 
Expected life (in years)
 
 
 
4.75
 
 
 
    
 
4.62 
 
      
 
4.75 
 
  
Weighted-average expected volatility
 
 
 
28.95%
 
 
    
 
30.81%
 
      
 
33.83%
 
  
Expected volatility range
 
 
24.86%
-
29.23%
 
    
25.50%
-
31.67%
      
31.61%
-
37.06%
  
Risk-free interest rate
 
 
 
1.43%
 
      
 
1.27% 
 
      
 
1.52%
 
  
Expected dividend yield
 
 
 
1.54%
 
 
    
 
1.12%
 
      
 
0.85%
 
  
Weighted-average fair value of grants
 
 
 
$7.75
 
 
    
 
$10.05
 
      
 
$13.82
 
  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 
 
 
 
 
 
Weighted-
 
 
 
 
 
 
 
Average
 
 
 
Options
 
 
Exercise Price
 
Outstanding at November 30, 2013
    
2,429,961
    $
25.74
 
Granted
    
477,606
     
48.06
 
Exercised
    
(330,179
 )    
20.75
 
Forfeited or cancelled
    
(42,915
 )    
38.59
 
Outstanding at November 29, 2014
    
2,534,473
    $
30.39
 
Granted
    
759,167
     
40.69
 
Exercised
    
(275,035
 )    
22.67
 
Forfeited or cancelled
    
(106,532
 )    
42.42
 
Outstanding at November 28, 2015
    
2,912,073
    $
33.37
 
                 
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
 
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 30, 2013
    
135,231
     
312,445
     
447,676
    $
33.76
     
1.2
  
Granted
    
126,536
     
-
     
126,536
     
48.84
     
1.2
  
Vested
    
(68,293
 )    
(114,044
 )    
(182,337
 )    
48.16
     
-
 
Forfeited
    
(4,813
 )    
(9,779
 )    
(14,592
 )    
37.80
     
1.1
  
                                         
Nonvested at November 29, 2014
    
188,661
     
188,622
     
377,283
    $
40.70
     
1.0
  
Granted
    
144,100
     
-
     
144,100
     
40.92
     
1.2
  
Vested
    
(82,495
 )    
(69,152
 )    
(151,647
 )    
37.47
     
-
 
Forfeited
    
(13,253
 )    
(9,310
 )    
(22,563
 )    
40.66
     
0.8
  
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
 
Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table Text Block]
 
 
Non-employee
 
 
 
 
 
 
 
 
 
 
 
Directors
 
 
Employees
 
 
Total
 
Units outstanding November 30, 2013
    
312,680
     
61,288
     
373,968
 
Participant contributions
    
14,347
     
4,429
     
18,776
 
Company match contributions
1
    
16,613
     
492
     
17,105
 
Payouts
    
(1,093
 )    
(13,906
 )    
(14,999
 )
                         
Units outstanding November 29, 2014
    
342,547
     
52,303
     
394,850
 
Participant contributions
    
16,312
     
4,705
     
21,017
 
Company match contributions
1
    
21,636
     
470
     
22,106
 
Payouts
    
(325
 )    
(11,572
 )    
(11,897
 )
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