Employee Benefits And Deferred Compensation Plans (Schedule Of Net Periodic Benefit Cost, SERP) (Details) - Supplemental Executive Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 144	$ 131	$ 148
Interest cost	250	124	100
Net amortization and deferral		209	314
Net periodic cost	$ 394	$ 464	$ 562