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Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |
Revenues | $ 138,077 | $ 129,577
Operating income | 7,706 | 8,704
Cardiovascular Segment |  |
Segment Reporting Information [Line Items] |  |
Revenues | 132,544 | 124,764
Operating income | 6,648 | 8,069
Endoscopy Segment |  |
Segment Reporting Information [Line Items] |  |
Revenues | 5,533 | 4,813
Operating income | $ 1,058 | $ 635

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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