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Debt (Details) (Amended Credit Facility, Wells Fargo Bank [Member], USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 29, 2013
Dec. 29, 2012
Amended Credit Facility, Wells Fargo Bank [Member]
   
Line of Credit Facility [Line Items]    
Amended maturity date of the credit facility Apr. 23, 2015  
Current borrowing capacity $ 20.0  
Maximum borrowing capacity 50.0  
Adjusted LIBO Rate basis (in hundredths) 1.25%  
Adjusted Base Rate - Daily One-Month LIBO Rate basis (in hundredths) 1.50%  
Available remaining borrowing capacity 20.0 20.0
Outstanding letters of credit $ 0 $ 0