Consolidated Statements of Changes in 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, 2017	$ 4,379	$ (1,429)	$ 69,110	$ 32,272	$ (2,390)	$ 101,942
Net income				2,613		2,613
Other comprehensive loss					(801)	(801)
Restricted stock compensation expense	4		92			96
Exercise of stock options	1		(1)
Shares withheld for employee taxes on stock option exercise and share award vest	(1)		(36)			(37)
Cash dividends - common				(300)		(300)
Sale of treasury shares to 401(k)		58	50			108
Sale of treasury shares to deferred comp. plan		26	23			49
Adoption impact - ASU 2018-02				471	(471)
Balance at Mar. 31, 2018	4,383	(1,345)	69,238	34,585	(3,191)	103,670
Balance at Dec. 31, 2018	4,391	(1,130)	69,333	42,223	(2,971)	111,846
Net income				2,587		2,587
Other comprehensive loss					641	641
Restricted stock compensation expense	9		70			61
Cash dividends - common				(303)		(303)
Sale of treasury shares to 401(k)		72	35			107
Sale of treasury shares to deferred comp. plan		31	16			47
Balance at Mar. 31, 2019	$ 4,382	$ (1,027)	$ 69,454	$ 44,507	$ (2,330)	$ 114,986