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Note 5 - Stock-based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jul. 01, 2012
Jun. 30, 2013
Jul. 01, 2012
Note 5 - Stock-based Compensation (Details) [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 0.1   $ 0.1  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value 2.5   2.5  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value 2.5   2.5  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)     598,000 573,500
Employee Stock Option [Member]
       
Note 5 - Stock-based Compensation (Details) [Line Items]        
Allocated Share-based Compensation Expense 0.1 0.2 0.1 0.4
Restricted Stock [Member]
       
Note 5 - Stock-based Compensation (Details) [Line Items]        
Allocated Share-based Compensation Expense     2.6 2.2
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options 14.3   14.3  
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options     $ 1.3 $ 0.3
Restricted Stock [Member] | Minimum [Member]
       
Note 5 - Stock-based Compensation (Details) [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     2 years  
Restricted Stock [Member] | Maximum [Member]
       
Note 5 - Stock-based Compensation (Details) [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years