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Segment Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | [2] | Jun. 30, 2016 USD ($) | [2] | Mar. 31, 2016 USD ($) | [2] | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2017 USD ($) segment | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Total revenues | $ 52,826 | [1] | $ 43,999 | $ 47,818 | $ 45,059 | $ 45,029 | [2] | $ 45,252 | $ 47,083 | $ 43,016 | $ 39,838 | $ 36,703 | $ 35,526 | $ 33,831 | $ 189,702 | $ 180,380 | $ 145,898
Total cost of products and preservation services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61,060 | 61,481 | 55,179
Total gross margin | 36,363 | [1] | $ 29,862 | $ 32,905 | $ 29,512 | 31,195 | [2] | $ 29,782 | $ 30,301 | $ 27,621 | 26,516 | $ 22,982 | $ 21,554 | $ 19,667 | 128,642 | 118,899 | 90,719
Goodwill | 188,305 |  |  |  |  | 78,294 |  |  |  |  | $ 11,365 |  |  |  | 188,305 | 78,294 | 11,365
Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 188,300 |  |  |  |  | $ 78,300 |  |  |  |  |  |  |  |  | 188,300 | 78,300 |
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Operating Segments [Member] | Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 119,631 | 113,992 | 83,081
Total cost of products and preservation services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,798 | 28,033 | 18,663
Total gross margin |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89,833 | 85,959 | 64,418
Operating Segments [Member] | Preservation Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,071 | 66,388 | 62,817
Total cost of products and preservation services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31,262 | 33,448 | 36,516
Total gross margin |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 38,809 | 32,940 | 26,301
Long-Lived Assets [Member] | Geographic Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99.00% |  |
Domestic [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 135,102 | $ 131,727 | $ 114,978
Domestic [Member] | Long-Lived Assets [Member] | Geographic Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% | 99.00% |
GERMANY |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | $ 13,300 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,300 |  |
[1] | In December 2017 we completed our acquisition of JOTEC, which is also being operated as a wholly owned subsidiary of CryoLife.
[2] | In January 2016 we completed our acquisition of On-X Life Technologies Holdings, Inc., which is being operated as a wholly owned subsidiary of CryoLife. In 2016 we also sold our HeRO Graft product line and our ProCol product line, and ceased sales of these products during 2016.

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