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Segment Reporting and Foreign Operations - Sales by Business Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 102,231 | $ 95,907 | $ 100,532 | $ 95,618 | $ 91,092 | $ 90,477 | $ 91,249 | $ 86,631 | $ 394,288 | $ 359,449 | $ 296,755
% Change | 9.69233% |  |  |  | 21.00% |  |  |  | 9.69233% | 21.00% | 15.00%
Cardiovascular Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 378,493 | 347,430 | 287,707
% Change | 8.94079% |  |  |  | 21.00% |  |  |  | 8.94079% | 21.00% | 15.00%
Cardiovascular Segment [Member] | Stand Alone Devices [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 114,242 | 101,959 | 88,586
% Change | 12.047% |  |  |  | 15.00% |  |  |  | 12.047% | 15.00% | 16.00%
Cardiovascular Segment [Member] | Custom Kit And Procedures Trays [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 94,586 | 91,532 | 82,799
% Change | 3.33654% |  |  |  | 11.00% |  |  |  | 3.33654% | 11.00% | 11.00%
Cardiovascular Segment [Member] | Inflation Devices [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 68,979 | 67,353 | 62,495
% Change | 2.41415% |  |  |  | 8.00% |  |  |  | 2.41415% | 8.00% | 2.00%
Cardiovascular Segment [Member] | Catheters [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 64,878 | 55,357 | 44,824
% Change | 17.19927% |  |  |  | 23.00% |  |  |  | 17.19927% | 23.00% | 18.00%
Cardiovascular Segment [Member] | Embolization Devices [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 33,870 | 31,229 | 9,003
% Change | 8.45688% |  |  |  | 246.87326% |  |  |  | 8.45688% | 246.87326% | 0.00%
Cardiovascular Segment [Member] | Electrophysiology [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,938 | 0 | 0
% Change | 0.00% |  |  |  | 0.00% |  |  |  | 0.00% | 0.00% | 0.00%
Endoscopy Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 15,795 | 12,019 | 9,048
Endoscopy Segment [Member] | Endoscopy Devices [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 15,795 | $ 12,019 | $ 9,048
% Change | 31.41692% |  |  |  | 33.00% |  |  |  | 31.41692% | 33.00% | 18.00%

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