Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	[1]
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 36,384
Due from one to five years, Amortized Cost	81,630
Due from five to ten years, Amortized Cost	57,935
Due after ten years, Amortized Cost	119,036
Total Amortized Cost	294,985
Due in one year or less, Estimated Fair Value	36,351
Due from one to five years, Estimated Fair Value	81,384
Due from five to ten years, Estimated Fair Value	57,352
Due after ten years, Estimated Fair Value	122,039
Total Estimated Fair Value	$ 297,126	$ 293,147

[1] Derived from audited consolidated financial statements