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Borrowings (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 27, 2014
Dec. 28, 2013
Debt Instrument [Line Items]    
Secured Debt, Current $ 13,500us-gaap_SecuredDebtCurrent $ 19,000us-gaap_SecuredDebtCurrent
Short-term debt reclassified from long-term debt 4,286us-gaap_OtherShortTermBorrowings 4,263us-gaap_OtherShortTermBorrowings
Short-term Debt, Total $ 17,786us-gaap_ShortTermBorrowings $ 23,263us-gaap_ShortTermBorrowings