CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Deferred Compensation, Share-based Payments [Member]	AOCI Attributable to Parent [Member]	Total
Balances at December 31, 2020 at Dec. 31, 2019	$ 283	$ 44,490	$ 68,320	$ (795)	$ 1,357	$ 113,655
Shares, Outstanding, Beginning Balance at Dec. 31, 2019	2,825,912
Net income for period			9,137			9,137
Other comprehensive loss, net of tax					1,339	1,339
Common stock dividends declared ($0.90 per share)			(2,462)			(2,462)
Issuance of restricted common stock	$ 1	439		(440)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	12,275
Forfeiture of stock awards		(50)		50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(1,200)
Stock based compensation-restricted stock awards		125		393		518
Balances at September 30, 2021 at Sep. 30, 2020	$ 284	45,171	74,995	(906)	2,696	122,240
Shares, Outstanding, Ending Balance at Sep. 30, 2020	2,843,292
Stock options exercised		53				53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	3,105
Issuance of director's restricted stock awards		114		(114)
[custom:StockIssuedDuringPeriodSharesDirectorsRestrictedStockAwards]	3,200
Balances at December 31, 2020 at Jun. 30, 2020	$ 284	45,096	71,461	(1,031)	2,634	118,444
Shares, Outstanding, Beginning Balance at Jun. 30, 2020	2,843,292
Net income for period			4,356			4,356
Other comprehensive loss, net of tax					62	62
Common stock dividends declared ($0.90 per share)			(822)			(822)
Issuance of restricted common stock		18		(18)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	500
Forfeiture of stock awards		(21)		21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(500)
Stock based compensation-restricted stock awards		78		122		200
Balances at September 30, 2021 at Sep. 30, 2020	$ 284	45,171	74,995	(906)	2,696	122,240
Shares, Outstanding, Ending Balance at Sep. 30, 2020	2,843,292
Balances at December 31, 2020 at Dec. 31, 2020	$ 284	45,264	76,974	(774)	3,004	124,752
Shares, Outstanding, Beginning Balance at Dec. 31, 2020	2,843,292
Net income for period			12,332			12,332
Other comprehensive loss, net of tax					(1,700)	(1,700)
Common stock dividends declared ($0.90 per share)			(2,566)			(2,566)
Issuance of restricted common stock	$ 1	623		(624)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	13,850
Stock based compensation-restricted stock awards		235		449		684
Balances at September 30, 2021 at Sep. 30, 2021	$ 286	46,278	86,740	(1,075)	1,304	133,533
Shares, Outstanding, Ending Balance at Sep. 30, 2021	2,861,697
Stock options exercised	$ 1	30				31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	1,755
Issuance of director's restricted stock awards		126		(126)
[custom:StockIssuedDuringPeriodSharesDirectorsRestrictedStockAwards]	2,800,000
Balances at December 31, 2020 at Jun. 30, 2021	$ 286	46,217	84,174	(1,224)	2,256	131,709
Shares, Outstanding, Beginning Balance at Jun. 30, 2021	2,861,697
Net income for period			3,453			3,453
Other comprehensive loss, net of tax					(952)	(952)
Common stock dividends declared ($0.90 per share)			(887)			(887)
Stock based compensation-restricted stock awards		61		149		210
Balances at September 30, 2021 at Sep. 30, 2021	$ 286	$ 46,278	$ 86,740	$ (1,075)	$ 1,304	$ 133,533
Shares, Outstanding, Ending Balance at Sep. 30, 2021	2,861,697