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Inventories (Details) - USD ($)
$ in Thousands
Oct. 01, 2016
Oct. 03, 2015
Inventory Disclosure [Abstract]    
Raw materials and purchased parts $ 174,331 $ 188,843
Work in progress 235,258 243,373
Finished goods 69,451 61,144
Inventories $ 479,040 $ 493,360