Reclassifications Out Of Accumulated Other Comprehensive Income (Summary Of Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains	$ 1,436	$ 619
Salaries and benefits	5,017	4,352
Provision for income taxes	1,796	1,631
Net income	4,406	3,881
Net income, net of tax	928	400
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain Attributable To Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains	1,436	619
Provision for income taxes	(503)	(217)
Net income	933	402
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Amortization Of Actuarial Loss For Supplemental Executive Retirement Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Salaries and benefits	(8)	(3)
Provision for income taxes	3	1
Net income	$ (5)	$ (2)