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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