Annual report pursuant to Section 13 and 15(d)

Inventories, Net - Summary of Inventories, Net of Allowance for Obsolescence (Detail)

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Inventories, Net - Summary of Inventories, Net of Allowance for Obsolescence (Detail) - USD ($)
$ in Thousands
Sep. 29, 2018
Sep. 30, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 117,539 $ 116,591
Work in progress 35,691 16,394
Finished goods 263,845 241,420
Supplies 10,748 7,696
Total inventories, net $ 427,823 $ 382,101