Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 32,295
Due from one to five years, Amortized Cost	84,789
Due from five to ten years, Amortized Cost	67,999
Due after ten years, Amortized Cost	104,644
Total Amortized Cost	289,727	$ 272,215
Due in one year or less, Estimated Fair Value	32,637
Due from one to five years, Estimated Fair Value	86,143
Due from five to ten years, Estimated Fair Value	68,841
Due after ten years, Estimated Fair Value	110,368
Total Estimated Fair Value	$ 297,989	$ 276,355	[1]

[1] Derived from audited consolidated financial statements