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STOCK-BASED COMPENSATION - Components of Stock-based Compensation Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2013
Sep. 28, 2012
Sep. 27, 2013
Sep. 28, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 1.8 $ 1.5 $ 6.4 $ 6.3
Restricted and unrestricted stock and performance share units
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 1.7 1.4 6.2 6.0
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 $ 0.2 $ 0.2