Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2015	$ 4,659	$ 38,778	$ 78,517	$ (3,722)	$ (6,856)	$ 111,376
Net income			2,726			2,726
Other comprehensive income				702		702
Cash dividends declared			(813)			(813)
Treasury shares issued under employee stock option/purchase plans		1			3	4
Common stock issued under dividend reinvestment plan	14	290				304
Stock option compensation expense		14				14
Balance at Mar. 31, 2016	4,673	39,083	80,430	(3,020)	(6,853)	114,313
Balance at Dec. 31, 2016	4,688	39,752	83,081	(4,215)	(6,813)	116,493
Net income			3,020			3,020
Other comprehensive income				299		299
Cash dividends declared			(907)			(907)
Treasury shares issued under employee stock option/purchase plans		4			21	25
Treasury shares issued under dividend reinvestment plan		84			137	221
Stock option compensation expense		27				27
Balance at Mar. 31, 2017	$ 4,688	$ 39,867	$ 85,194	$ (3,916)	$ (6,655)	$ 119,178