Securities (Summary Of Proceeds From Sales, Calls And Maturities, Principal Payments, Gains And Losses Of Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities [Abstract]
Securities available for sale, Proceeds from Sales	$ 152,882	$ 72,453	$ 69,632
Securities available for sale, Proceeds from Calls and Maturities	2,700	3,235	2,043
Securities available for sale, Proceeds from Principal Payments	31,902	35,881	38,502
Securities available for sale, Gross realized Gains	685	1,422	1,732
Securities available for sale, Gross realized Losses	$ 699	$ 295	$ 288