Segment Reporting - Sales by Business Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue from External Customer [Line Items]
Revenues	$ 119,236	$ 103,948
Operating Income (Loss)	6,489	1,757
Cardiovascular Segment
Revenue from External Customer [Line Items]
Revenues	114,907	99,754
Operating Income (Loss)	6,396	1,628
Endoscopy Segment
Revenue from External Customer [Line Items]
Revenues	4,329	4,194
Operating Income (Loss)	$ 93	$ 129