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Note 9 - Accounting for Share-based Compensation (Details Textual) - USD ($)
12 Months Ended
Dec. 01, 2018
Dec. 02, 2017
Dec. 03, 2016
Income Tax Expense (Benefit), Total $ (6,356,000) $ 9,810,000 $ 48,920,000
Excess Tax Benefit from Share-based Compensation, Financing Activities 2,010,000 1,641,000
Fair Value Options Granted During Period Value Share-based Compensation 9,217,000 17,157,000 6,615,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 4,534,000 8,677,000 11,675,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 7 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 28,290,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 2,241,666    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 5 years 109 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 25,006,000    
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Total 6,237,000 17,705,000 11,269,000
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options 868,000 $ 2,723,000 $ 3,506,000
Total Fair Value of Nonvested Restricted Stock $ 19,661,000    
Repurchased Restricted Stock Shares 71,181,000 56,230,000 67,807,000
Accounting Standards Update 2016-09 [Member]      
Income Tax Expense (Benefit), Total $ 1,047,000    
Selling, General and Administrative Expenses [Member]      
Allocated Share-based Compensation Expense, Total $ 17,113 $ 17,503,000 $ 13,344,000
Non Employee Directors [Member]      
Deferred Compensation Plan, Matching Percentage 10.00%    
Deferred Compensation Arrangement with Individual, Discretionary Awards, Employer Contribution Units Paid 18,436,000 15,738,000 18,186,000
Deferred Compensation Arrangement with Individual, Employer Matches Contribution Fair Value $ 152,000 $ 133,000 $ 156,000
Deferred Compensation Arrangement with Individual, Discretionary Awards Employer Contribution, Fair Value $ 1,035,000 805,000 800,000
Employees [Member]      
Deferred Compensation Plan, Matching Percentage 10.00%    
Deferred Compensation Arrangement with Individual, Employer Matches Contribution Fair Value $ 27,000 26,000 18,000
2018 Master Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 2,844,637    
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 7,212,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 73 days    
Employee Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Employee Stock Option [Member] | Share-based Compensation Award, Tranche Two [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Employee Stock Option [Member] | Share-based Compensation Award, Tranche Three [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 8,892,000 7,708,000 6,257,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense $ 2,649,000 $ 3,059,000 $ 2,080,000
Restricted Stock [Member] | Share-based Compensation Award, Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Restricted Stock [Member] | Share-based Compensation Award, Tranche Two [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Restricted Stock [Member] | Share-based Compensation Award, Tranche Three [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.30%    
Restricted Stock Units (RSUs) [Member]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 9,575,000    
Performance Shares [Member] | Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Option Price, Percent Increase 150.00%