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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
Mar. 27, 2021
Dec. 26, 2020
Current inventory:    
Raw materials $ 75,545 $ 69,272
Work in process 16,679 16,846
Finished goods 68,447 44,792
Total current inventory 160,671 130,910
Long term inventory 10,459 9,639
Total inventory $ 171,130 $ 140,549