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Revenue Recognition (Disaggregation Of Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Disaggregation of Revenue [Line Items]    
Total sources of revenue $ 77,213 $ 71,087
Domestic Hospitals [Member]    
Disaggregation of Revenue [Line Items]    
Total sources of revenue 36,993 36,229
International Hospitals [Member]    
Disaggregation of Revenue [Line Items]    
Total sources of revenue 28,414 26,128
International Distributors [Member]    
Disaggregation of Revenue [Line Items]    
Total sources of revenue 11,064 8,642
Cardiogenesis [Member]    
Disaggregation of Revenue [Line Items]    
Total sources of revenue $ 742 $ 88