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Receivables, Net (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2013
Dec. 29, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customers, trade $ 46,293 $ 31,043
Other receivables 2,062 1,642
Gross receivables 48,355 32,685
Less allowance for doubtful accounts (198) (216)
Net receivables $ 48,157 $ 32,469