Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 35,953
Due from one to five years, Amortized Cost	90,019
Due from five to ten years, Amortized Cost	65,888
Due after ten years, Amortized Cost	114,129
Total Amortized Cost	305,989	$ 277,157
Due in one year or less, Estimated Fair Value	36,387
Due from one to five years, Estimated Fair Value	91,719
Due from five to ten years, Estimated Fair Value	66,497
Due after ten years, Estimated Fair Value	116,781
Total Estimated Fair Value	$ 311,384	$ 286,127	[1]

[1] Derived from audited consolidated financial statements