Fair Value Measurements (Schedule Of OREO Measured And Reported At Fair Value) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Other Real Estate [Roll Forward]
Beginning balance	$ 4,588	$ 6,518	$ 6,518
Disposed	(2,070)	(3,156)
Ending balance	3,995	5,491	$ 4,588
OREO remeasured at initial recognition:
Other Real Estate [Roll Forward]
Carrying value of foreclosed assets prior to remeasurement	2,743	2,528
Charge-offs recognized in the allowance for loan losses	(954)	0
Fair value	1,789	2,528
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	1,152	829
Write-downs included in other non-interest expense	$ (312)	$ (399)