Note 8 - Accounting for Share-based Compensation (Details Textual) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 02, 2018	Jun. 03, 2017	Jun. 02, 2018	Jun. 03, 2017
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 300		$ 1,353
Fair Value Options Granted During Period Value Share-based Compensation	$ 1,392	373	$ 9,037	7,757
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	1,172	2,204	1,811	6,624
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Total	1,625	5,377	2,387	13,926
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	577	$ 432	8,477	$ 7,402
Total Fair Value of Nonvested Restricted Stock	$ 19,808		$ 19,808
Repurchased Restricted Stock Shares	3,645	3,122	66,936	53,809
Deferred Compensation Plan, Matching Percentage			10.00%
Employee Stock Option [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 17,558		$ 17,558
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			1 year 219 days
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	13,822		$ 13,822
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			1 year 146 days
Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense, Total	$ 4,848	$ 3,811	$ 10,434	$ 8,843

Percent matched on deferred compensation investment.

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Fair value of options granted during the period.

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Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cash inflow from issuance of shares under share-based compensation arrangement. Issuance includes, but is not limited to, exercise of stock options and similar instruments.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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