Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 30,056
Due from one to five years, Amortized Cost	77,571
Due from five to ten years, Amortized Cost	60,653
Due after ten years, Amortized Cost	90,856
Total Amortized Cost	259,136	$ 294,251
Due in one year or less, Estimated Fair Value	30,214
Due from one to five years, Estimated Fair Value	78,032
Due from five to ten years, Estimated Fair Value	61,130
Due after ten years, Estimated Fair Value	95,971
Total Estimated Fair Value	$ 265,347	$ 293,147	[1]

[1] Derived from audited consolidated financial statements