Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 36,859
Due from one to five years, Amortized Cost	87,349
Due from five to ten years, Amortized Cost	84,030
Due after ten years, Amortized Cost	213,242
Total Amortized Cost	421,480	$ 277,157
Due in one year or less, Estimated Fair Value	37,229
Due from one to five years, Estimated Fair Value	89,178
Due from five to ten years, Estimated Fair Value	84,348
Due after ten years, Estimated Fair Value	213,986
Total Estimated Fair Value	$ 424,741	$ 286,127	[1]

[1] Derived from audited consolidated financial statements