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Interest Rate Swaps Estimated Amount to be Reclassified into Earnings Next 12 Months (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2017
Jul. 01, 2017
Jun. 25, 2016
Jul. 01, 2017
Jun. 25, 2016
Dec. 31, 2016
Dec. 26, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]              
Derivative Instruments, Loss Recognized in Other Comprehensive Income (Loss), Effective Portion   $ (250)          
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion     $ 2,234 $ 211 $ 2,234    
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred $ 100            
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 1,521 $ 1,521 $ (1,362) $ 1,521 $ (1,362) $ 1,392  
Beginning Balance [Member]              
Derivative Instruments and Hedging Activities Disclosures [Line Items]              
Accumulated Other Comprehensive Income (Loss), Net of Tax           $ 1,392 $ 0