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Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details) - Designated as Hedging Instrument [Member] € in Thousands, SFr in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020 EUR (€)	Dec. 31, 2019 EUR (€)	Mar. 31, 2020 CHF (SFr)	Mar. 31, 2020 CAD ($)	Dec. 31, 2019 CHF (SFr)	Dec. 31, 2019 CAD ($)
Canadian Dollars [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount | $				$ 13,762		$ 15,932
Derivative, Maturity Date	Feb. 01, 2021	Feb. 01, 2021
Euro [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount | €	€ 23,555	€ 18,168
Derivative, Maturity Date	Feb. 01, 2021	Feb. 01, 2021
Swiss Francs [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount | SFr			SFr 580		SFr 661
Derivative, Maturity Date	Aug. 01, 2020	Aug. 01, 2020

X

- Definition

Foreign Exchange Contracts [Line Items]

+ References

No definition available.

+ Details

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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

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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Details

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- Details

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