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Note 3 - Accounting for Share-Based Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Nov. 28, 2015
Nov. 29, 2014
Nov. 30, 2013
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 36 days    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 182 days    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 840    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 6,192 $ 8,782 $ 6,807
Restricted Stock Units (RSUs) [Member]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 328 days    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 5,609    
Non Employee Directors [Member]      
Deferred Compensation Plan, Matching Percentage 10.00%    
Deferred Compensation Arrangement with Individual, Discretionary Awards, Employer Contribution Units Paid 20,005 15,019  
Deferred Compensation Arrangement with Individual, Employer Matches Contribution Fair Value $ 122 $ 130 49
Deferred Compensation Arrangement with Individual, Discretionary Awards Employer Contribution, Fair Value $ 800 720 480
Employees [Member]      
Deferred Compensation Plan, Matching Percentage 10.00%    
Deferred Compensation Arrangement with Individual, Employer Matches Contribution Fair Value $ 17 19 8
Selling, General and Administrative Expenses [Member]      
Allocated Share-based Compensation Expense 14,156 13,376 12,317
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options 1,433 3,357 2,676
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation 20,180    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options 7,232    
Fair Value Options Granted During Period Value Share-based Compensation 7,632 6,599 7,425
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value 5,327 8,915 9,842
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options 4,631 $ 6,852 $ 8,891
Total Fair Value of Nonvested Restricted Stock $ 14,639    
Repurchased Restricted Stock Shares 54,454 67,593 62,124