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Inventories (Components Of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Inventory, Net [Abstract]    
Raw materials $ 54,359 $ 51,439
Work in process 68,718 83,324
Finished goods 26,507 43,077
Inventories $ 149,584 $ 177,840