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Inventories, Net - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Dec. 27, 2019
Sep. 30, 2019
Inventory Disclosure [Abstract]    
Purchased materials and manufactured parts, net $ 53,141 $ 52,742
Work in process, net 24,678 21,424
Finished goods, net 164,871 151,924
Inventories, net $ 242,690 $ 226,090