Fair Value Measurements (Schedule Of OREO Measured And Reported At Fair Value) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Other Real Estate [Roll Forward]
Beginning balance	$ 3,585	$ 4,588	$ 4,588
Disposed	(1,478)	(2,070)
Ending balance	4,259	3,995	$ 3,585
OREO remeasured at initial recognition:
Other Real Estate [Roll Forward]
Carrying value of foreclosed assets prior to remeasurement	3,909	2,743
Charge-offs recognized in the allowance for loan losses	(1,429)	(954)
OREO remeasured subsequent to initial recognition:
Other Real Estate [Roll Forward]
Carrying value of foreclosed assets prior to remeasurement	1,742	1,464
Write-downs included in other non-interest expense	(328)	(312)
Fair Value, Measurements, Nonrecurring [Member] | OREO remeasured at initial recognition:
Other Real Estate [Roll Forward]
Assets, Fair Value Disclosure	2,480	1,789
Fair Value, Measurements, Nonrecurring [Member] | OREO remeasured subsequent to initial recognition:
Other Real Estate [Roll Forward]
Assets, Fair Value Disclosure	$ 1,414	$ 1,152