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STOCK-BASED COMPENSATION - Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 29, 2012
Jul. 01, 2011
Jun. 29, 2012
Jul. 01, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 1.9 $ 1.5 $ 4.8 $ 4.1
Restricted and unrestricted stock and performance share units expense
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 1.8 1.4 4.6 3.8
Stock option expense
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 0 0.1 0.1 0.2
ESPP expense
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 0.1 $ 0 $ 0.1 $ 0.1