Segment Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Product Information [Line Items]
Total revenues	$ 98,019	$ 89,251	$ 195,450	$ 172,480
Products
Product Information [Line Items]
Total revenues	73,210	66,003	144,324	128,294
Aortic stent grafts
Product Information [Line Items]
Total revenues	32,190	28,359	64,293	54,509
On-X
Product Information [Line Items]
Total revenues	20,645	17,946	40,326	35,602
Surgical sealants
Product Information [Line Items]
Total revenues	18,545	16,566	35,526	33,269
Other
Product Information [Line Items]
Total revenues	1,830	3,132	4,179	4,914
Preservation services
Product Information [Line Items]
Total revenues	$ 24,809	$ 23,248	$ 51,126	$ 44,186