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Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details) € in Thousands, SFr in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 CHF (SFr) | Dec. 31, 2018 EUR (€) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 CAD ($) | Dec. 31, 2018 CAD ($)
Canadian Dollars [Member] |  |  |  |  |
Foreign Exchange Contracts [Line Items] |  |  |  |  |
Foreign exchange contracts, Notional Amount | $ |  |  |  | $ 15,932 | $ 6,166
Derivative, Maturity Date | Feb. 01, 2021 | Aug. 01, 2019 |  |  |
Euro [Member] |  |  |  |  |
Foreign Exchange Contracts [Line Items] |  |  |  |  |
Foreign exchange contracts, Notional Amount | € |  | € 10,710 | € 18,168 |  |
Derivative, Maturity Date | Feb. 01, 2021 | Feb. 01, 2020 |  |  |
Swiss Francs [Member] |  |  |  |  |
Foreign Exchange Contracts [Line Items] |  |  |  |  |
Foreign exchange contracts, Notional Amount | SFr | SFr 661 |  |  |  |
Derivative, Maturity Date | Aug. 01, 2020 |  |  |  |

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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