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Segment Reporting and Foreign Operations - Sales by Business Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 11.00% |  |  |  | 6.00% |  |  |  | 11.00% | 6.00% | 14.00%
Net Sales | $ 157,715 | $ 156,975 | $ 151,071 | $ 138,077 | $ 138,404 | $ 136,086 | $ 138,082 | $ 129,577 | $ 603,838 | $ 542,149 | $ 509,689
Cardiovascular Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 11.00% |  |  |  | 6.00% |  |  |  | 11.00% | 6.00% | 14.00%
Net Sales |  |  |  |  |  |  |  |  | $ 580,248 | $ 520,915 | $ 491,706
Cardiovascular Segment | Stand Alone Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 25.00% |  |  |  | 8.00% |  |  |  | 25.00% | 8.00% | 15.00%
Net Sales |  |  |  |  |  |  |  |  | $ 193,517 | $ 155,414 | $ 143,712
Cardiovascular Segment | Custom Kit And Procedures Trays |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 3.00% |  |  |  | 5.00% |  |  |  | 3.00% | 5.00% | 7.00%
Net Sales |  |  |  |  |  |  |  |  | $ 119,392 | $ 116,368 | $ 111,076
Cardiovascular Segment | Inflation Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 1.00% |  |  |  | 1.00% |  |  |  | 1.00% | 1.00% | 10.00%
Net Sales |  |  |  |  |  |  |  |  | $ 73,919 | $ 73,373 | $ 72,538
Cardiovascular Segment | Catheters |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 15.00% |  |  |  | 11.00% |  |  |  | 15.00% | 11.00% | 17.00%
Net Sales |  |  |  |  |  |  |  |  | $ 110,939 | $ 96,833 | $ 87,550
Cardiovascular Segment | Embolization Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 2.00% |  |  |  | 3.00% |  |  |  | 2.00% | 3.00% | 31.00%
Net Sales |  |  |  |  |  |  |  |  | $ 46,035 | $ 45,025 | $ 43,855
Cardiovascular Segment | Electrophysiology |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 8.00% |  |  |  | 3.00% |  |  |  | 8.00% | 3.00% | 17.00%
Net Sales |  |  |  |  |  |  |  |  | $ 36,446 | $ 33,902 | $ 32,975
Endoscopy Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | $ 23,590 | $ 21,234 | $ 17,983
Endoscopy Segment | Endoscopy Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
% Change | 11.00% |  |  |  | 18.00% |  |  |  | 11.00% | 18.00% | 6.00%
Net Sales |  |  |  |  |  |  |  |  | $ 23,590 | $ 21,234 | $ 17,983

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