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Summary Of Significant Accounting Policies (Schedule Of Supplemental Disclosures Of Cash Flow Information) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Interest | $ 13,297 | $ 15,005 | $ 2,561
Income taxes | $ 1,944 | $ 1,699 | 3,358
JOTEC [Member] |  |  |
Issuance of common stock for acquisition of intangible assets |  |  | $ 53,119

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