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, 2016	$ 4,688	$ 39,752	$ 83,081	$ (4,215)	$ (6,813)	$ 116,493
Net (Loss) Income			6,362			6,362
Other comprehensive income (loss)				673		673
Cash dividends declared			(1,945)			(1,945)
Treasury shares issued under employee stock purchase plan		26			116	142
Treasury shares issued under dividend reinvestment plan		211			317	528
Stock option compensation expense		107				107
Balance at Jun. 30, 2017	4,688	40,096	87,498	(3,542)	(6,380)	122,360
Balance at Dec. 31, 2017	4,689	40,396	82,218	(6,028)	(6,131)	115,144
Cumulative adjustment for fair value of equity securities			201	(201)
Net (Loss) Income			(1,679)			(1,679)
Other comprehensive income (loss)				(1,053)		(1,053)
Cash dividends declared			(2,226)			(2,226)
Acquisition of 2,605 shares of treasury stock					(88)	(88)
Treasury shares issued under employee stock purchase plan		29			47	76
Treasury shares issued under dividend reinvestment plan		303			333	636
Common stock issued under incentive stock option plan, 10,668	11	228				239
Stock option compensation expense		123				123
Balance at Jun. 30, 2018	$ 4,700	$ 41,079	$ 78,514	$ (7,282)	$ (5,839)	$ 111,172