Segment Reporting (Schedule of Revenue from External Customers by Products and Services) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue from External Customer [Line Items]
Revenue	$ 69,680	$ 62,884
Disposable products
Revenue from External Customer [Line Items]
Revenue	65,481	59,008
Laser, service, and other
Revenue from External Customer [Line Items]
Revenue	4,199	3,876
Vascular intervention | Disposable products
Revenue from External Customer [Line Items]
Revenue	46,448	41,912
Lead management | Disposable products
Revenue from External Customer [Line Items]
Revenue	$ 19,033	$ 17,096