Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 34,731
Due from one to five years, Amortized Cost	82,553
Due from five to ten years, Amortized Cost	59,749
Due after ten years, Amortized Cost	100,124
Total Amortized Cost	277,157	$ 272,215
Due in one year or less, Estimated Fair Value	35,192
Due from one to five years, Estimated Fair Value	84,313
Due from five to ten years, Estimated Fair Value	60,645
Due after ten years, Estimated Fair Value	105,977
Total Estimated Fair Value	$ 286,127	$ 276,355