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Interest Rate Swaps Tax Impact of Derivative Liability on Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax $ (32) $ 79 $ (1,267) $ 900