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Interest Rate Swaps Schedule of Changes in AOCL Net of Tax (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 01, 2017
Jun. 25, 2016
Jul. 01, 2017
Jun. 25, 2016
Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]          
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  
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0 0 0  
Other Comprehensive Income (Loss), Net of Tax (152) (1,362) 129 (1,362) $ 1,392
Ending fiscal year AOCI balance $ 1,521 $ (1,362) $ 1,521 $ (1,362) $ 1,392