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				4,662		4,662
Other comprehensive income (loss)					(987)	(987)
Restricted stock compensation expense	8		196			204
Exercise of stock options	2		(2)
Shares withheld for employee taxes on stock option exercise and share award vest	(4)		(176)			(180)
Cash dividends - common				(601)		(601)
Non-cash funding of 401(k)		102	92			194
Non-cash funding of deferred comp. plan		51	48			99
Adoption impact - ASU 2018-02				471	(471)
Balance at Jun. 30, 2018	4,385	(1,276)	69,268	36,804	(3,848)	105,333
Balance at Mar. 31, 2018	4,383	(1,345)	69,238	35,056	(3,662)	103,670
Net income				2,049		2,049
Other comprehensive income (loss)					(186)	(186)
Restricted stock compensation expense	4		104			108
Exercise of stock options	1		(1)
Shares withheld for employee taxes on stock option exercise and share award vest	(3)		(140)			(143)
Cash dividends - common				(301)		(301)
Non-cash funding of 401(k)		44	42			86
Non-cash funding of deferred comp. plan		25	25			50
Balance at Jun. 30, 2018	4,385	(1,276)	69,268	36,804	(3,848)	105,333
Balance at Dec. 31, 2018	4,391	(1,130)	69,333	42,223	(2,971)	111,846
Net income				5,174		5,174
Other comprehensive income (loss)					1,302	1,302
Restricted stock compensation expense	(9)		152			143
Cash dividends - common				(606)		(606)
Non-cash funding of 401(k)		114	83			197
Non-cash funding of deferred comp. plan		55	45			100
Balance at Jun. 30, 2019	4,382	(961)	69,613	46,791	(1,669)	118,156
Balance at Mar. 31, 2019	4,382	(1,027)	69,454	44,507	(2,330)	114,986
Net income				2,587		2,587
Other comprehensive income (loss)					661	661
Restricted stock compensation expense			82			82
Cash dividends - common				(303)		(303)
Non-cash funding of 401(k)		42	48			90
Non-cash funding of deferred comp. plan		24	29			53
Balance at Jun. 30, 2019	$ 4,382	$ (961)	$ 69,613	$ 46,791	$ (1,669)	$ 118,156