Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Available-for-sale Securities [Abstract]
Due in one year or less, Amortized Cost	$ 64,066
Due from one to five years, Amortized Cost	92,401
Due from five to ten years, Amortized Cost	21,621
Due after ten years, Amortized Cost	88,674
Equity securities, Amortized Cost	77
Total Amortized Cost	266,839	$ 276,631	$ 276,793
Due in one year or less, Estimated Fair Value	65,288
Due from one to five years, Estimated Fair Value	93,910
Due from five to ten years, Estimated Fair Value	22,241
Due after ten years, Estimated Fair Value	90,611
Equity securities, Estimated Fair Value	77
Total Estimated Fair Value	$ 272,127