Goodwill And Other Intangible Assets (Schedule Of Carrying Values Of Indefinite Lived Intangible Assets)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 193,145	$ 188,305
In Process R&D [Member]
Indefinite-lived Intangible Assets [Line Items]
Total indefinite lived intangible assets	14,251	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