Federal Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Federal Income Taxes [Abstract]
Tax provision at statutory rate									$ 4,241	$ 3,539	$ 2,559
Income on tax-exempt loans and securities									(1,566)	(1,466)	(1,212)
Nondeductible interest expense relating to carrying tax-exempt obligations									22	28	30
Dividends received exclusion									(2)	(7)	(15)
Income from bank owned life insurance									(182)	(163)	(185)
Life insurance proceeds									(35)		111
Change in valuation allowance									(200)
Stock option compensation									25
Other, net									(32)	75	7
Income tax provision	$ 493	$ 306	$ 632	$ 839	$ 347	$ 641	$ 606	$ 412	$ 2,271	$ 2,006	$ 1,295
Effective income tax rate									18.20%	19.30%	17.20%
Statutory rate									34.00%	34.00%	34.00%