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Benefit Plans (Schedule Of Amounts Recognized In Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Benefit Plans [Abstract]    
Net Actuarial loss $ (7,812) $ (6,975)
Accumulated pension adjustment (7,812) (6,975)
Tax effect 1,641 1,465
Net amount recognized in accumulated other comprehensive loss $ (6,171) $ (5,510)