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Segment And Geographic Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
 [2]
Jun. 30, 2017
 [2]
Mar. 31, 2017
 [2]
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]                              
Total revenues $ 67,799 [1] $ 64,598 $ 68,496 $ 61,948 $ 52,826 [2] $ 43,999 $ 47,818 $ 45,059 $ 45,029 $ 45,252 $ 47,083 $ 43,016 $ 262,841 $ 189,702 $ 180,380
Total cost of products and preservation services                         89,857 61,060 61,481
Total gross margin 45,191 [1] $ 42,714 $ 45,851 $ 39,228 36,363 [2] $ 29,862 $ 32,905 $ 29,512 31,195 $ 29,782 $ 30,301 $ 27,621 172,984 128,642 118,899
Goodwill 188,781       188,305       $ 78,294       188,781 188,305 78,294
Medical Devices [Member]                              
Segment Reporting Information [Line Items]                              
Goodwill 188,800       188,300               188,800 188,300  
Operating Segments [Member] | Medical Devices [Member]                              
Segment Reporting Information [Line Items]                              
Total revenues                         187,394 119,631 113,992
Total cost of products and preservation services                         53,772 29,798 28,033
Total gross margin                         133,622 89,833 85,959
Operating Segments [Member] | Preservation Services [Member]                              
Segment Reporting Information [Line Items]                              
Total revenues                         75,447 70,071 66,388
Total cost of products and preservation services                         36,085 31,262 33,448
Total gross margin                         39,362 38,809 32,940
Domestic [Member]                              
Segment Reporting Information [Line Items]                              
Total revenues                         $ 144,651 $ 135,102 $ 131,727
Domestic [Member] | Long-Lived Assets [Member] | Geographic Concentration Risk [Member]                              
Segment Reporting Information [Line Items]                              
Concentration percentage                         57.00% 60.00%  
GERMANY                              
Segment Reporting Information [Line Items]                              
Long-lived assets $ 13,100       $ 13,300               $ 13,100 $ 13,300  
GERMANY | Long-Lived Assets [Member] | Geographic Concentration Risk [Member]                              
Segment Reporting Information [Line Items]                              
Concentration percentage                         98.00% 99.00%  
[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.