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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.