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 Income [Member]	Treasury Stock [Member]	Director [Member]	Officer [Member]	Total
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 (loss), net of tax								1,425				1,425
Common stock grants	$ 13			$ 135						$ 148
Compensation expense recognized on stock grants, net of unearned compensation expense		$ 19			$ 25						$ 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 (loss), 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 (loss), 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
BALANCE-Beginning at Dec. 31, 2020			7,637			26,405	76,960	2,937	(1,765)			112,174
Net income							4,044					4,044
Other comprehensive income (loss), net of tax								(2,030)				(2,030)
Common stock grants	$ 12			$ 174						$ 186
Compensation expense recognized on stock grants, net of unearned compensation expense						60						60
Shares issued under employee stock purchase plan			1			12						13
Purchase of treasury stock									(416)			(416)
BALANCE-Ending at Mar. 31, 2021			7,650			26,651	81,004	907	(2,181)			114,031
BALANCE-Beginning at Dec. 31, 2020			7,637			26,405	76,960	2,937	(1,765)			112,174
Net income												8,151
Other comprehensive income (loss), net of tax												(1,925)
BALANCE-Ending at Jun. 30, 2021			7,651			26,725	82,858	1,012	(2,365)			115,881
BALANCE-Beginning at Mar. 31, 2021			7,650			26,651	81,004	907	(2,181)			114,031
Net income							4,107					4,107
Other comprehensive income (loss), net of tax								105				105
Dividend declared							(2,253)					(2,253)
Compensation expense recognized on stock grants, net of unearned compensation expense						61						61
Shares issued under employee stock purchase plan			1			13						14
Purchase of treasury stock									(184)			(184)
BALANCE-Ending at Jun. 30, 2021			$ 7,651			$ 26,725	$ 82,858	$ 1,012	$ (2,365)			$ 115,881