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. 29, 2019
Sep. 29, 2018
Jun. 30, 2018
Inventory Disclosure [Abstract]      
Raw materials $ 138,073 $ 117,539 $ 118,826
Work in progress 36,355 35,691 33,306
Finished goods 275,286 263,845 263,416
Supplies 15,203 10,748 12,459
Total inventories, net $ 464,917 $ 427,823 $ 428,007