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Summary Of Significant Accounting Policies (Schedule Of Supplemental Disclosures Of Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest	$ 15,005	$ 2,561	$ 2,446
Income taxes	$ 1,699	3,358	2,501
On-X [Member]
Issuance of common stock for acquisition of intangible assets			$ 34,593
JOTEC [Member]
Issuance of common stock for acquisition of intangible assets		$ 53,119

X

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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