Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2015	$ 2,955	$ (2,015)	$ 35,097	$ 21,436	$ (1,985)	$ 55,488
Net income				2,665		2,665
Other comprehensive income					1,216	1,216
Restricted stock compensation expense	32		698			730
Taxes on exercise of stock options and share award vest	(15)		(421)			(436)
Tax benefit for restricted stock vest			64			64
Cash dividends - common				(398)		(398)
Sale of treasury shares to 401(k)		78	52			130
Sale of treasury shares to deferred comp. plan		47	31			78
Balance at Jun. 30, 2016	2,972	(1,890)	35,521	23,703	(769)	59,537
Balance at Dec. 31, 2016	4,351	(1,730)	68,973	25,520	(2,274)	94,840
Net income				4,727		4,727
Other comprehensive income					154	154
Restricted stock compensation expense	8		206			214
Exercise of stock options	9		(9)
Taxes on exercise of stock options and share award vest			(187)			(187)
Cash dividends - common				(596)		(596)
Sale of treasury shares to 401(k)		98	37			135
Sale of treasury shares to deferred comp. plan		50	68			118
Balance at Jun. 30, 2017	$ 4,368	$ (1,582)	$ 69,088	$ 29,651	$ (2,120)	$ 99,405