Segment Information (Schedule Of Income (Loss) From Operations By Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Loss from operations	$ (17,498)	$ (9,071)
Reportable Geographical Components
Loss from operations	(16,955)	(8,576)
Intercompany Sales
Loss from operations	(543)	(495)
Americas | Operating Segments
Loss from operations	(18,924)	(13,450)
EMEA | Operating Segments
Loss from operations	(2,005)	533
Asia Pacific | Operating Segments
Loss from operations	$ 3,974	$ 4,341