Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Abstract]
Due in one year or less, Amortized Cost	$ 28,893
Due from one to five years, Amortized Cost	49,496
Due from five to ten years, Amortized Cost	46,075
Due after ten years, Amortized Cost	159,818
Equity securities, Amortized Cost	137
Total Amortized Cost	284,419	$ 324,908
Due in one year or less, Estimated Fair Value	28,891
Due from one to five years, Estimated Fair Value	49,248
Due from five to ten years, Estimated Fair Value	44,936
Due after ten years, Estimated Fair Value	160,009
Equity securities, Estimated Fair Value	137
Total Estimated Fair Value	$ 283,221