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Receivables, Net (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 28, 2014
Dec. 28, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customers, trade $ 51,421 $ 41,898
Other receivables 2,218 2,306
Gross receivables 53,639 44,204
Less allowance for doubtful accounts (223) (141)
Receivables, net $ 53,416 $ 44,063