Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities [Abstract]
Due in one year or less, Amortized Cost	$ 53,236
Due from one to five years, Amortized Cost	91,067
Due from five to ten years, Amortized Cost	16,049
Due after ten years, Amortized Cost	106,616
Equity securities, Amortized Cost	137
Total Amortized Cost	267,105	$ 276,443
Due in one year or less, Estimated Fair Value	53,659
Due from one to five years, Estimated Fair Value	91,536
Due from five to ten years, Estimated Fair Value	15,992
Due after ten years, Estimated Fair Value	105,218
Equity securities, Estimated Fair Value	137
Total Estimated Fair Value	$ 266,542