Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Revenues	$ 95,907	$ 90,477	$ 292,057	$ 268,357
Operating Income (Loss)	9,082	6,507	25,311	27,564
Cardiovascular Segment [Member]
Segment Reporting Information [Line Items]
Revenues	92,106	87,524	280,336	259,391
Operating Income (Loss)	9,169	7,405	26,005	30,385
Endoscopy Segment [Member]
Segment Reporting Information [Line Items]
Revenues	3,801	2,953	11,721	8,966
Operating Income (Loss)	$ (87)	$ (898)	$ (694)	$ (2,821)