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Goodwill And Other Intangible Assets (Schedule Of Carrying Values Of Indefinite Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]    
Goodwill $ 188,118 $ 188,305
In Process R&D [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Total indefinite lived intangible assets 9,485 13,954
Procurement Contracts And Agreements [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Total indefinite lived intangible assets 2,013 2,013
Trademarks [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Total indefinite lived intangible assets $ 841 $ 841