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Nature of Operations and Summary of Significant Accounting Policies - Revenue from Contract with Customers (Details) - USD ($)
$ in Thousands
Jun. 29, 2019
Dec. 29, 2018
Accounting Policies [Abstract]    
Accounts receivable $ 106,202 $ 92,624
Contract assets 13,728 15,741
Contract liabilities $ 41,239 $ 34,774