Revenue Recognition (Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total sources of revenue	$ 298,836	$ 253,227	$ 276,222
Domestic Hospitals [Member]
Disaggregation of Revenue [Line Items]
Total sources of revenue	150,301	137,810	144,538
International Hospitals [Member]
Disaggregation of Revenue [Line Items]
Total sources of revenue	106,639	80,524	85,241
International Distributors [Member]
Disaggregation of Revenue [Line Items]
Total sources of revenue	41,046	34,429	40,427
Cardiogenesis [Member]
Disaggregation of Revenue [Line Items]
Total sources of revenue	$ 850	$ 464	$ 6,016