Segment And Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands	3 Months Ended																	12 Months Ended
	Dec. 31, 2019	[1]	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	[1]	Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Product Information [Line Items]
Total revenues	$ 69,697		$ 67,881	$ 71,139	$ 67,505	$ 67,799	$ 64,598	$ 68,496	$ 61,948	$ 52,826		$ 43,999		$ 47,818		$ 45,059		$ 276,222	$ 262,841	$ 189,702
BioGlue [Member]
Product Information [Line Items]
Total revenues																		68,611	66,660	65,939
JOTEC [Member]
Product Information [Line Items]
Total revenues																		64,974	63,341	4,136
On-X [Member]
Product Information [Line Items]
Total revenues																		50,096	44,832	37,041
CardioGenesis Cardiac Laser Therapy [Member]
Product Information [Line Items]
Total revenues																		6,016	6,217	6,866
PerClot [Member]
Product Information [Line Items]
Total revenues																		3,795	3,767	3,533
PhotoFix [Member]
Product Information [Line Items]
Total revenues																		3,754	2,577	2,116
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues																		40,879	35,683	32,510
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues																		38,097	39,764	37,561
Preservation Services [Member]
Product Information [Line Items]
Total revenues																		78,976	75,447	70,071
Operating Segments [Member] | Medical Devices [Member]
Product Information [Line Items]
Total revenues																		197,246	187,394	119,631
Operating Segments [Member] | Preservation Services [Member]
Product Information [Line Items]
Total revenues																		$ 78,976	$ 75,447	$ 70,071

[1] In December 2017 we completed our acquisition of JOTEC, which is operated as a wholly-owned subsidiary of CryoLife.