Securities (Summary Of Maturities, Amortized Cost And Estimated Fair Values Of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Available-for-sale Securities [Abstract]
Due in one year or less, Amortized Cost	$ 53,078
Due from one to five years, Amortized Cost	86,572
Due from five to ten years, Amortized Cost	18,245
Due after ten years, Amortized Cost	97,606
Equity securities, Amortized Cost	77
Total Amortized Cost	255,578	$ 276,443	$ 266,839
Due in one year or less, Estimated Fair Value	54,009
Due from one to five years, Estimated Fair Value	88,289
Due from five to ten years, Estimated Fair Value	18,713
Due after ten years, Estimated Fair Value	101,014
Equity securities, Estimated Fair Value	77
Total Estimated Fair Value	$ 262,102