Quarterly report pursuant to Section 13 or 15(d)

Inventories, net - Summary of Inventories, Net of Allowance for Obsolescence (Details)

v3.8.0.1
Inventories, net - Summary of Inventories, Net of Allowance for Obsolescence (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Sep. 30, 2017
Mar. 25, 2017
Inventory Disclosure [Abstract]      
Raw materials $ 117,370 $ 116,591 $ 122,029
Work in progress 40,491 16,394 21,636
Finished goods 293,988 241,420 273,752
Supplies 13,673 7,696 8,968
Total inventories, net $ 465,522 $ 382,101 $ 426,385