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Long-Term Debt (Debt Schedule) (Details) - USD ($)
$ in Thousands
Jun. 29, 2019
Dec. 29, 2018
Debt Disclosure [Abstract]    
Principal amount $ 191,500 $ 263,033
Unamortized original issue discount and debt costs (2,023) (3,386)
Less: Current portion of long-term debt (17,190) (8,290)
Long-term debt, net of current portion $ 172,287 $ 251,357