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Inventories, net (Details) - USD ($)
$ in Thousands
Sep. 25, 2021
Sep. 26, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 211,581 $ 152,692
Work in progress 86,187 49,312
Finished goods 349,338 218,847
Supplies 38,131 18,764
Total inventories, net $ 685,237 $ 439,615