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Derivatives (Schedule Of Effect Of Derivative Instruments On The Statement Of Income) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Other Contracts [Member] | Other Income [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain or (Loss) Recognized in Income on Derivatives $ 8 $ 23