Quarterly report pursuant to Section 13 or 15(d)

Inventories, net - Summary of Inventories, Net of Allowance for Obsolescence (Details)

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Inventories, net - Summary of Inventories, Net of Allowance for Obsolescence (Details) - USD ($)
$ in Thousands
Jun. 27, 2020
Sep. 28, 2019
Jun. 29, 2019
Inventory Disclosure [Abstract]      
Raw materials $ 151,412 $ 145,331 $ 138,073
Work in progress 42,185 51,154 36,355
Finished goods 218,542 255,870 275,286
Supplies 13,780 13,842 15,203
Total inventories, net $ 425,919 $ 466,197 $ 464,917