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Acquisitions Pro forma combined financial information (Details) - Vascular Solutions and NeoTract Acquisitions - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |
Net revenue | $ 2,255,696 | $ 2,084,439
Net income | $ 119,934 | $ 106,512
Earnings per share, basic (in dollars per share) | $ 2.66 | $ 2.46
Earnings per share, diluted (in dollars per share) | $ 2.57 | $ 2.24
Weighted average basic shares outstanding, pro forma (in shares) | 45,004 | 43,325
Pro forma weighted average shares outstanding, diluted (in shares) | 46,664 | 47,646

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