Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Consolidated Statements Of Comprehensive Income [Abstract]
Net unrealized (depreciation) appreciation on securities available for sale, tax	$ (2,308)	$ 2,903	$ (1,299)	$ 5,948
Reclassification adjustment for net gains related to securities available for sale included in net income, tax	(205)	(119)	(422)	(254)
Net unrealized appreciation on interest rate derivatives, tax	122	25	(87)	25
Actuarial (loss) gain on supplemental executive retirement plan, net of related tax	$ 3	$ 2	$ (5)	$ 5