Quarterly Results Of Operations (Schedule Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Results Of Operations [Abstract]
Interest Income	$ 8,790	$ 8,720	$ 8,578	$ 8,526	$ 8,629	$ 8,830	$ 8,761	$ 8,574	$ 34,615	$ 34,794	$ 36,042
Interest Expense	556	555	619	641	734	799	817	830	2,371	3,180	4,378
Net interest income	8,234	8,165	7,959	7,885	7,895	8,031	7,944	7,744	32,244	31,614	31,664
Provision for loan losses	250	400	310	325	300		266	198	1,285	764	2,920
Other noninterest income	3,150	2,733	3,108	2,934	2,791	2,788	2,641	2,380	12,652	11,131	10,033
Securities gains (including gain on conversion)			8	718	59	(20)	221		8	280	33
Noninterest Expense	8,374	7,613	7,659	7,489	8,251	7,748	7,615	7,688	31,136	31,573	31,250
Income before income taxes	2,760	2,885	3,106	3,723	2,194	3,051	2,925	2,238	12,475	10,408	7,527
Federal income tax expense	493	306	632	839	347	641	606	412	2,271	2,006	1,295
Net income	$ 2,267	$ 2,579	$ 2,474	$ 2,884	$ 1,847	$ 2,410	$ 2,319	$ 1,826	$ 10,204	$ 8,402	$ 6,232
Basic earnings per share	$ 0.53	$ 0.61	$ 0.58	$ 0.68	$ 0.44	$ 0.57	$ 0.55	$ 0.44	$ 2.40	$ 2.01	$ 1.51
Diluted earnings per share	0.53	0.61	0.58	0.68	0.44	0.57	0.55	0.44	2.40	2.00	1.51
Dividend declared per share	$ 0.19	$ 0.19	$ 0.19	$ 0.17	$ 0.17	$ 0.17	$ 0.17	$ 0.17	$ 0.74	$ 0.68	$ 0.68