Other Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (49,897)	$ (34,299)	$ (49,278)	$ (5,671)
Net Change	(8,793)	(15,525)	(9,412)	(44,153)
Ending Balance	(58,690)	(49,824)	(58,690)	(49,824)
Net Unrealized Loss On Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(48,007)	(31,898)	(47,348)	(3,160)
Net Change	(8,813)	(15,581)	(9,472)	(44,319)
Ending Balance	(56,820)	(47,479)	(56,820)	(47,479)
Net Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,890)	(2,401)	(1,930)	(2,511)
Net Change	20	56	60	166
Ending Balance	$ (1,870)	$ (2,345)	$ (1,870)	$ (2,345)