Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Revenues	$ 100,532	$ 91,249	$ 196,150	$ 177,880
Operating Income (Loss)	8,222	10,847	16,229	21,057
Cardiovascular Segment [Member]
Segment Reporting Information [Line Items]
Revenues	96,560	87,940	188,230	171,867
Operating Income (Loss)	8,499	11,763	16,836	22,951
Endoscopy Segment [Member]
Segment Reporting Information [Line Items]
Revenues	3,972	3,309	7,920	6,013
Operating Income (Loss)	$ (277)	$ (916)	$ (607)	$ (1,894)