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Inventories - Components of Inventory (Details) - USD ($)
$ in Thousands
Jun. 29, 2019
Dec. 29, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 49,664 $ 38,955
Work-in-process 9,157 9,036
Finished goods 39,964 46,741
Total inventories $ 98,785 $ 94,732