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Note 3 - Accounting for Share-Based Compensation (Tables)
12 Months Ended
Nov. 28, 2015
Notes Tables  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
 
 
2015
 
 
2014
 
 
2013
 
Expected life (in years)
 
 
4.62
 
    4.75       4.75  
Weighted-average expected volatility
 
 
30.81
%
    33.83 %     47.28 %
Expected volatility range
 
 
25.50%
-
31.67
%
    31.61% - 37.06 %     39.25% - 48.02 %
Risk-free interest rate
 
 
1.27
%
    1.52 %     0.77 %
Expected dividend yield
 
 
1.12
%
    0.85 %     0.87 %
Weighted-average fair value of grants
 
$
10.05
 
  $ 13.82     $ 15.05  
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
 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
 
 
Units
 
 
Shares
 
 
Total
 
 
Weighted-
Average
Grant
Date
Fair
Value
 
 
Weighted-
Average
Remaining
Contractual
Life
(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
 
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