Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Available-for-sale Securities [Abstract]
Due in one year or less, Amortized Cost	$ 58,168
Due from one to five years, Amortized Cost	103,471
Due from five to ten years, Amortized Cost	18,437
Due after ten years, Amortized Cost	85,970
Equity securities, Amortized Cost	77
Total Amortized Cost	266,123	$ 276,443	$ 275,204
Due in one year or less, Estimated Fair Value	58,981
Due from one to five years, Estimated Fair Value	105,032
Due from five to ten years, Estimated Fair Value	18,932
Due after ten years, Estimated Fair Value	88,493
Equity securities, Estimated Fair Value	77
Total Estimated Fair Value	$ 271,515