Employee Benefits And Deferred Compensation Plans (Schedule Of Net Periodic Benefit Costs, SERP) (Details) (Supplemental Executive Retirement Plans [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 168	$ 165	$ 180
Interest cost	159	125	153
Net amortization and deferral	115	180	195
Settlement charge		105
Net periodic benefit cost	$ 442	$ 575	$ 528