Parent Company Only (Schedule Of Condensed Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	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, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Other income	$ 2,194	$ 2,024	$ 2,091	$ 1,687	$ 1,873	$ 2,015	$ 1,817	$ 1,748	$ 1,749	$ 1,748	$ 1,727	$ 1,531	$ 7,996	$ 7,453	$ 6,755
Total other income													8,005	7,533	7,354
Income before taxes	2,767	2,811	2,597	2,287	2,455	2,616	1,730	2,120	2,193	2,193	2,184	1,948	10,462	8,921	8,518
Credit for income taxes	(738)	(776)	(669)	(586)	(634)	(687)	50	(547)	(555)	(562)	(557)	(492)	(2,769)	(1,818)	(2,166)
Net income	$ 2,029	$ 2,035	$ 1,928	$ 1,701	$ 1,821	$ 1,929	$ 1,780	$ 1,573	$ 1,638	$ 1,631	$ 1,627	$ 1,456	7,693	7,103	6,352
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in undistributed earnings of subsidiary													5,289	4,659	4,458
Dividends from subsidiary													2,960	2,844	2,242
Other income													21	20	22
Total other income													8,270	7,523	6,722
Operating expenses													864	610	539
Income before taxes													7,406	6,913	6,183
Credit for income taxes													287	190	169
Net income													$ 7,693	$ 7,103	$ 6,352