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STOCK-BASED COMPENSATION - Components of Stock-based Compensation Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2013
Jun. 29, 2012
Jun. 28, 2013
Jun. 29, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 1.7 $ 1.9 $ 4.6 $ 4.8
Restricted and unrestricted stock and performance share units
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 1.6 1.8 4.5 4.6
Stock option
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 0 0 0 0.1
Employee stock purchase plan
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 0.1 $ 0.1 $ 0.1 $ 0.1