Fair Value Measurements (Schedule Of OREO Measured And Reported At Fair Value) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other Real Estate [Roll Forward]
Beginning Balance	$ 4,588	$ 6,518
Disposals	(2,578)	(4,416)
Ending Balance	3,585	4,588
OREO Remeasured At Initial Recognition
Other Real Estate [Roll Forward]
Carrying value of foreclosed assets prior to remeasurement	3,066	3,151
Charge-offs recognized in the allowance for loan losses	(1,117)	0
Fair value	1,949	3,151
OREO Remeasured Subsequent To Initial Recognition
Other Real Estate [Roll Forward]
Carrying value of foreclosed assets prior to remeasurement	1,464	1,228
Fair value	1,090	563
Write-downs included in other non-interest expense	$ (374)	$ (665)