Segment Information (Schedule Of Income (Loss) From Operations By Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Loss from operations	$ (21,305)	$ (17,465)
Reportable Geographical Components
Loss from operations	(21,305)	(17,465)
Americas | Operating Segments
Loss from operations	(26,832)	(19,981)
EMEA | Operating Segments
Loss from operations	2,917	(1,216)
Asia Pacific | Operating Segments
Loss from operations	$ 2,610	$ 3,732