Segment And Geographic Information (Schedule Of Geographic Allocation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Total revenue	$ 66,966	$ 58,492
United States [Member]
Total revenue	21,051	6,504
France [Member]
Total revenue	6,345	6,477
Japan [Member]
Total revenue	5,641	6,674
Switzerland [Member]
Total revenue	4,531	5,143
Korea [Member]
Total revenue	3,500	4,811
Other Asia [Member]
Total revenue	11,331	16,089
Other Europe [Member]
Total revenue	8,856	9,071
Other International [Member]
Total revenue	$ 5,711	$ 3,723