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Debt - Summary of Interest Rate Swaps Included on Balance Sheets (Details) - Interest Rate Swap - Designated - Cash Flow Hedge - USD ($)
$ in Thousands
Sep. 27, 2015
Dec. 31, 2014
Accrued Liabilities    
Interest rate swaps included on the balance sheet    
Accrued liabilities $ 892 $ 640
Other long-term obligations    
Interest rate swaps included on the balance sheet    
Other long-term obligations $ 181 $ 380