Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member] Director [Member]	Common Stock [Member] Officer [Member]	Common Stock [Member]	Surplus [Member] Director [Member]	Surplus [Member] Officer [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]	Director [Member]	Officer [Member]	Total
BALANCE-Beginning at Dec. 31, 2018			$ 7,530			$ 25,532	$ 56,410	$ (1,247)	$ (1,000)			$ 87,225
Net income							2,552					2,552
Other comprehensive income, net of tax								1,598				1,598
Compensation expense recognized on stock options						1						1
Common stock grants	$ 10			$ 151						$ 161
Compensation expense recognized on stock grants, net of unearned compensation expense						51						51
Shares issued under employee stock purchase plan			1			13						14
BALANCE-Ending at Mar. 31, 2019			7,541			25,748	58,962	351	(1,000)			91,602
BALANCE-Beginning at Dec. 31, 2018			7,530			25,532	56,410	(1,247)	(1,000)			87,225
Net income												5,166
Other comprehensive income, net of tax												2,407
BALANCE-Ending at Jun. 30, 2019			7,542			25,809	60,081	1,160	(1,000)			93,592
BALANCE-Beginning at Mar. 31, 2019			7,541			25,748	58,962	351	(1,000)			91,602
Net income							2,614					2,614
Other comprehensive income, net of tax								809				809
Dividend declared							(1,495)					(1,495)
Compensation expense recognized on stock options						1						1
Compensation expense recognized on stock grants, net of unearned compensation expense						50						50
Shares issued under employee stock purchase plan			1			10						11
BALANCE-Ending at Jun. 30, 2019			7,542			25,809	60,081	1,160	(1,000)			93,592
BALANCE-Beginning at Dec. 31, 2019			7,544			25,937	65,794	1,340	(1,000)			99,615
Net income							2,457					2,457
Other comprehensive income, net of tax								1,425				1,425
Common stock grants	$ 13	$ 19		$ 135	$ 25					$ 148	$ 44
Shares issued under employee stock purchase plan			1			13						14
Purchase of treasury stock									(720)			(720)
BALANCE-Ending at Mar. 31, 2020			7,577			26,110	68,251	2,765	(1,720)			102,983
BALANCE-Beginning at Dec. 31, 2019			7,544			25,937	65,794	1,340	(1,000)			99,615
Net income												5,774
Other comprehensive income, net of tax												1,650
BALANCE-Ending at Jun. 30, 2020			7,578			26,119	69,924	2,990	(1,720)			104,891
BALANCE-Beginning at Mar. 31, 2020			7,577			26,110	68,251	2,765	(1,720)			102,983
Net income							3,317					3,317
Other comprehensive income, net of tax								225				225
Dividend declared							(1,644)					(1,644)
Compensation expense recognized on stock grants, net of unearned compensation expense						(3)						(3)
Shares issued under employee stock purchase plan			1			12						13
BALANCE-Ending at Jun. 30, 2020			$ 7,578			$ 26,119	$ 69,924	$ 2,990	$ (1,720)			$ 104,891