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Inventories (Schedule of Inventory) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Oct. 01, 2016
Inventory Disclosure [Abstract]    
Raw materials and purchased parts $ 189,517 $ 174,331
Work in progress 229,202 235,258
Finished goods 70,408 69,451
Inventories $ 489,127 $ 479,040