Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details) - Designated as Hedging Instrument [Member] € in Thousands, $ in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022 CAD ($)	Dec. 31, 2021 CAD ($)	Mar. 31, 2022 EUR (€)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 EUR (€)
Canadian Dollars [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	$ 16,440	$ 14,850
Derivative, Maturity Date	Feb. 01, 2023	Feb. 01, 2023
Euros [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount \| €			€ 18,713		€ 20,104
Derivative, Maturity Date	Feb. 01, 2023	Feb. 01, 2023
Australia Dollars [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount				$ 1,863
Derivative, Maturity Date	Jun. 01, 2022