Parent Company Only (Schedule Of Condensed Cash Flow 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]
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
Stock-based compensation expense													519	225	207
Net cash provided by operating activities													15,859	15,725	7,898
Net cash used in investing activities													(58,161)	(74,624)	(39,933)
Cash contributions from dividend reinvestment plan															104
Exercise of stock options													14	101
Withholdings to purchase capital stock													111	102	80
Net cash provided by financing activities													55,868	45,325	44,668
Net increase (decrease) in cash and cash equivalents													13,566	(13,574)	12,633
Cash and cash equivalents, beginning				12,277				25,851				13,218	12,277	25,851	13,218
Cash and cash equivalents, ending	25,843				12,277				25,851				25,843	12,277	25,851
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income													7,693	7,103	6,352
Equity in earnings of subsidiary													(8,249)	(7,503)	(6,700)
Stock-based compensation expense													519	225	207
Changes in other assets and liabilities, net													(36)	(2)	(35)
Net cash provided by operating activities													(73)	(177)	(176)
Dividends received from subsidiary													2,960	2,844	2,242
Net cash used in investing activities													2,960	2,844	2,242
Dividends paid, net of dividend reinvestment													(3,061)	(2,844)	(2,088)
Cash contributions from dividend reinvestment plan															104
Exercise of stock options													14	101
Withholdings to purchase capital stock													111	102	80
Net cash provided by financing activities													(2,936)	(2,641)	(1,904)
Net increase (decrease) in cash and cash equivalents													(49)	26	162
Cash and cash equivalents, beginning				$ 190				$ 164				$ 2	190	164	2
Cash and cash equivalents, ending	$ 141				$ 190				$ 164				$ 141	$ 190	$ 164