Segment And Geographic Information (Schedule Of Geographic Allocation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 105,705	$ 82,692	$ 201,079	$ 164,198
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	39,195	29,567	71,767	60,077
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	11,213	6,413	22,317	11,905
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	9,223	8,238	18,140	16,662
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	6,813	4,497	13,220	8,265
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	5,422	5,012	10,738	9,324
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	17,746	15,751	33,780	31,530
Other Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	13,674	11,276	26,158	21,089
Other International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2,419	$ 1,938	$ 4,959	$ 5,346