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Intangible Assets Intangible Assets - Future Amortization Expense (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
2018 (balance of year) $ 4,411  
2019 3,959  
2020 3,714  
2021 3,333  
2022 1,854  
Thereafter 11,191  
Intangible assets, net $ 28,462 $ 27,123