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Debt - Schedule of Long Term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 30, 2018
Debt    
Outstanding debt $ 384,241 $ 625,009
Unamortized debt issuance costs (3,251) (3,874)
Current portion of long-term debt (31,241) (20,009)
Total long-term debt, less current portion, net $ 349,749 $ 601,126