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. 29, 2018
Sep. 29, 2018
Dec. 30, 2017
Inventory Disclosure [Abstract]      
Raw materials $ 134,955 $ 117,539 $ 120,710
Work in progress 34,553 35,691 13,778
Finished goods 306,181 263,845 291,812
Supplies 18,056 10,748 14,121
Total inventories, net $ 493,745 $ 427,823 $ 440,421