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Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Feb. 04, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 187,047 |  | $ 184,472
HeRO®Graft [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Inventories |  | $ 2,455 |
Fixed Assets |  | 290 |
Goodwill |  | 2,555 |
Total assets acquired |  | 18,500 |
Developed technology | HeRO®Graft [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangibles |  | 12,100 |
Trademarks | HeRO®Graft [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangibles |  | 700 |
Customer lists | HeRO®Graft [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangibles |  | $ 400 |

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