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Segment Reporting - Sales by Business Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Revenue from External Customer [Line Items] |  |
Revenues | $ 119,236 | $ 103,948
Operating Income (Loss) | 6,489 | 1,757
Cardiovascular Segment |  |
Revenue from External Customer [Line Items] |  |
Revenues | 114,907 | 99,754
Operating Income (Loss) | 6,396 | 1,628
Endoscopy Segment |  |
Revenue from External Customer [Line Items] |  |
Revenues | 4,329 | 4,194
Operating Income (Loss) | $ 93 | $ 129

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