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Inventories (Components Of Inventory) (Details) - USD ($)
$ in Thousands
Oct. 01, 2017
Dec. 31, 2016
Inventory, Net [Abstract]    
Raw materials $ 59,942 $ 54,359
Work in process 98,667 68,718
Finished goods 21,676 26,507
Inventories $ 180,285 $ 149,584