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Interest Rate Swap Derivative Liability Fair Value (Details) - USD ($)
$ in Thousands
Jun. 25, 2016
Dec. 26, 2015
Jun. 27, 2015
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Liability $ 2,540 $ 0 $ 0
Derivative Liability, Fair Value, Gross Liability 2,600    
Interest Rate Swap Short Term Portion [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Liability 1,237 0 0
Interest Rate Swap Long Term Portion [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Liability $ 1,303 $ 0 $ 0