Investment Securities (Gross Realized Gains And Losses On Sales Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Investment Holdings [Line Items]
Gains	$ 135	$ 545	$ 135	$ 1,241
Losses	100	383	102	383
Obligations Of States And Political Subdivisions
Investment Holdings [Line Items]
Gains	0	275	0	971
Losses	1	0	3	0
Residential Mortgage Backed Securities And Collateralized Mortgage Obligations [Member]
Investment Holdings [Line Items]
Gains	135	270	135	270
Losses	$ 99	$ 383	$ 99	$ 383