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
Dec. 28, 2019
Sep. 28, 2019
Dec. 29, 2018
Inventory Disclosure [Abstract]      
Raw materials $ 156,464 $ 145,331 $ 134,955
Work in progress 68,489 51,154 34,553
Finished goods 314,213 255,870 306,181
Supplies 17,313 13,842 18,056
Total inventories, net $ 556,479 $ 466,197 $ 493,745