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Segment And Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
 [1]
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
 [2]
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
Product Information [Line Items]                              
Total revenues $ 67,799 $ 64,598 $ 68,496 $ 61,948 $ 52,826 $ 43,999 $ 47,818 $ 45,059 $ 45,029 $ 45,252 $ 47,083 $ 43,016 $ 262,841 $ 189,702 $ 180,380
BioGlue And BioFoam [Member]                              
Product Information [Line Items]                              
Total revenues                         66,660 65,939 63,461
JOTEC [Member]                              
Product Information [Line Items]                              
Total revenues                         63,341 4,136  
On-X [Member]                              
Product Information [Line Items]                              
Total revenues                         44,832 37,041 34,232
CardioGenesis Cardiac Laser Therapy [Member]                              
Product Information [Line Items]                              
Total revenues                         6,217 6,866 7,864
PerClot [Member]                              
Product Information [Line Items]                              
Total revenues                         3,767 3,533 4,021
PhotoFix [Member]                              
Product Information [Line Items]                              
Total revenues                         2,577 2,116 1,871
HeRO Graft [Member]                              
Product Information [Line Items]                              
Total revenues                             2,325
ProCol [Member]                              
Product Information [Line Items]                              
Total revenues                             218
Cardiac Tissues [Member]                              
Product Information [Line Items]                              
Total revenues                         35,683 32,510 29,697
Vascular Tissues [Member]                              
Product Information [Line Items]                              
Total revenues                         39,764 37,561 36,691
Preservation Services [Member]                              
Product Information [Line Items]                              
Total revenues                         75,447 70,071 66,388
Operating Segments [Member] | Medical Devices [Member]                              
Product Information [Line Items]                              
Total revenues                         187,394 119,631 113,992
Operating Segments [Member] | Preservation Services [Member]                              
Product Information [Line Items]                              
Total revenues                         $ 75,447 $ 70,071 $ 66,388
[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.