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Stock-Based Compensation Stock-Based Compensation (Restricted Stock Awards) (Details) (Restricted Stock [Member], USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 30, 2012
Apr. 01, 2011
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-Employee Directors Equity Plan, Shares awarded 27,573 27,853
Price Per Share $ 25.39 $ 25.14
Compensation Expense $ 0.7 $ 0.7