Segment And Geographic Information (Schedule Of Geographic Allocation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 115,452	$ 90,161	$ 316,531	$ 254,359
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	41,921	30,131	113,688	90,208
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	13,929	9,182	36,246	21,087
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	9,295	8,938	27,435	25,600
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	8,707	5,831	21,927	14,096
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	5,987	5,345	16,725	14,669
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4,326	16,283	38,106	47,813
Other Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	14,636	11,815	40,794	32,904
Other International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 16,651	$ 2,636	$ 21,610	$ 7,982