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Inventories, net (Details) - USD ($)
$ in Thousands
Jun. 26, 2021
Dec. 26, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 56,138 $ 48,122
Work-in-progress 35,911 30,806
Finished goods 19,841 20,301
Inventories $ 111,890 $ 99,229