Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2015	$ 78,221	$ 8,758	$ 13,730	$ 54,682	$ 1,051
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,370			6,370
Other comprehensive income (loss)	(1,075)				(1,075)
Reclassification of stranded tax effects from change in tax rate	0
Restricted stock awards, stock incentive plan		33	(33)
Income tax benefit on vesting restricted stock	2		2
Stock-based compensation expense	314		314
Issuance of common stock, dividend investment plan	533	58	475
Issuance of common stock, employee benefit plan	81	8	73
Retirement of common stock	(2,143)	(224)	(1,919)
Dividends declared	(2,887)			(2,887)
Ending Balance at Dec. 31, 2016	79,416	8,633	12,642	58,165	(24)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,786			7,786
Other comprehensive income (loss)	283				283
Reclassification of stranded tax effects from change in tax rate	51			(51)	51
Restricted stock awards, stock incentive plan		36	(36)
Stock-based compensation expense	382		382
Issuance of common stock, dividend investment plan	403	35	368
Issuance of common stock, employee benefit plan	166	15	151
Retirement of common stock	(1,564)	(132)	(1,432)
Dividends declared	(3,055)			(3,055)
Ending Balance at Dec. 31, 2017	83,817	8,587	12,075	62,845	310
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,001			9,001
Other comprehensive income (loss)	(1,863)				(1,863)
Reclassification of stranded tax effects from change in tax rate	0
Restricted stock awards, stock incentive plan		36	(36)
Stock-based compensation expense	518		518
Issuance of common stock, dividend investment plan	483	37	446
Issuance of common stock, employee benefit plan	163	11	152
Retirement of common stock	(1,261)	(98)	(1,163)
Dividends declared	(3,259)			(3,259)
Ending Balance at Dec. 31, 2018	$ 87,599	$ 8,573	$ 11,992	$ 68,587	$ (1,553)