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Derivative Financial Instruments (Impact Of Derivative Financial Instruments) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Interest Rate Contract [Member] | Cash Flow Hedging [Member]        
Derivative [Line Items]        
Amount of gain or (loss) recognized in OCI on derivative (effective portion) $ 72 $ (239) $ (972) $ (1,040)