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Debt - Summary of Amended and Restated Credit Facility (Details) - USD ($)
$ in Thousands
Sep. 28, 2018
Dec. 29, 2017
Debt Disclosure [Abstract]    
Amount outstanding $ 0 $ 35,000
Standby letter of credit 5,000 5,000
Available borrowing capacity 95,000 60,000
Maximum borrowing capacity $ 100,000 $ 100,000