Segment Reporting And Foreign Operations Segment Reporting By Business Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenue from External Customer [Line Items]
Revenue, Net	$ 91,092	$ 90,477	$ 91,249	$ 86,631	$ 81,203	$ 73,172	$ 74,948	$ 67,432	$ 359,449	$ 296,755	$ 257,462
Sales By Business Segment % Change Current Year vs Prior Year	21.00%				15.00%				21.00%	15.00%	13.00%
Stand Alone Devices [Member]
Revenue from External Customer [Line Items]
Revenue, Net									101,959	88,586	76,075
Sales By Business Segment % Change Current Year vs Prior Year	15.00%				16.00%				15.00%	16.00%	12.00%
Custom Kit And Procedures Trays [Member]
Revenue from External Customer [Line Items]
Revenue, Net									91,532	82,799	74,541
Sales By Business Segment % Change Current Year vs Prior Year	11.00%				11.00%				11.00%	11.00%	12.00%
Inflation Devices [Member]
Revenue from External Customer [Line Items]
Revenue, Net									67,353	62,495	61,058
Sales By Business Segment % Change Current Year vs Prior Year	8.00%				2.00%				8.00%	2.00%	(1.00%)
Catheters [Member]
Revenue from External Customer [Line Items]
Revenue, Net									55,357	44,824	38,126
Sales By Business Segment % Change Current Year vs Prior Year	23.00%				18.00%				23.00%	18.00%	23.00%
Embolization Devices [Member]
Revenue from External Customer [Line Items]
Revenue, Net									31,229	9,003	0
Sales By Business Segment % Change Current Year vs Prior Year	247.00%				0.00%				247.00%	0.00%	0.00%
Total Cardiovascular [Member]
Revenue from External Customer [Line Items]
Revenue, Net									347,430	287,707	249,800
Sales By Business Segment % Change Current Year vs Prior Year	21.00%				15.00%				21.00%	15.00%	10.00%
Endoscopy Devices [Member]
Revenue from External Customer [Line Items]
Revenue, Net									$ 12,019	$ 9,048	$ 7,662
Sales By Business Segment % Change Current Year vs Prior Year	33.00%				18.00%				33.00%	18.00%	0.00%