CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Unearned Stock Grant Compensation [Member]	Treasury Stock [Member]	Total
Beginning Balance at Dec. 31, 2015	$ 55	$ 22,401	$ 56,623	$ 25,443	$ 4,584	$ (273)	$ (6,341)	$ 102,492
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	0	2,636	0	0	0	2,636
Other comprehensive income, net of tax	0	0	0	0	1,246	0	0	1,246
Dividends on common stock	0	0	0	(408)	0	0	0	(408)
Dividends on preferred stock	0	0	0	(399)	0	0	0	(399)
Restricted stock grants	0	0	461	0	0	(741)	280	0
Amortization of unearned compensation	0	0	0	0	0	586	0	586
Purchase of shares for treasury	0	0	0	0	0	0	(698)	(698)
Issuance of shares under stock plans	0	0	30	0	0	0	21	51
Ending Balance at Dec. 31, 2016	55	22,401	57,114	27,272	5,830	(428)	(6,738)	105,506
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	0	4,528	0	0	0	4,528
Other comprehensive income, net of tax	0	0	0	0	3,921	0	0	3,921
Dividends on common stock	0	0	0	(408)	0	0	0	(408)
Dividends on preferred stock	0	0	0	(399)	0	0	0	(399)
Restricted stock grants	0	0	363	0	0	(646)	283	0
Amortization of unearned compensation	0	0	0	0	0	495	0	495
Purchase of shares for treasury	0	0	0	0	0	0	(692)	(692)
Issuance of shares under stock plans	0	0	18	0	0	0	14	32
Ending Balance at Dec. 31, 2017	$ 55	$ 22,401	$ 57,495	$ 30,993	$ 9,751	$ (579)	$ (7,133)	$ 112,983