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Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 24, 2016
Dec. 26, 2015
Sep. 26, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Gross Liability $ 1,800    
Revolving credit loan   $ 150,000 $ 190,000
2016 Senior Credit Facility [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unsecured Debt $ 295,000