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. 30, 2017
Sep. 30, 2017
Dec. 24, 2016
Inventory Disclosure [Abstract]      
Raw materials $ 120,710 $ 116,591 $ 125,324
Work in progress 13,778 16,394 21,024
Finished goods 291,812 241,420 273,730
Supplies 14,121 7,696 10,093
Total inventories, net $ 440,421 $ 382,101 $ 430,171