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Nature of Operations and Summary of Significant Accounting Policies - Revenue from Contract with Customers (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Dec. 30, 2017
Revenue from Contract with Customer [Abstract]    
Accounts receivable $ 96,326 $ 89,624
Contract assets 8,315 2,374
Contract liabilities $ 48,959 $ 38,702