Segment Reporting - Operating Income (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)
Segment Reporting [Abstract]
Number of Operating Segments | segment	2
Segment Reporting Information [Line Items]
Net Sales	$ 171,069	$ 138,077
Operating income	5,609	7,706
Cardiovascular Segment
Segment Reporting Information [Line Items]
Net Sales	164,787	132,544
Operating income	4,004	6,648
Endoscopy Segment
Segment Reporting Information [Line Items]
Net Sales	6,282	5,533
Operating income	$ 1,605	$ 1,058