CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - 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, 2017 at Dec. 31, 2017	$ 279	$ 42,998	$ 54,664	$ (606)	$ 179	$ 97,514
Shares, Outstanding, Beginning Balance at Dec. 31, 2017	2,785,216
Net income for year			8,824			8,824
Adoption of ASU 2016-01			(16)		16
Other comprehensive income, net of tax					(415)	(415)
Common stock dividends declared ($1.16 per share)			(3,133)			(3,133)
Stock options exercised	$ 1	221				222
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	9,155
Issuance of restricted common stock	$ 1	409		(410)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	9,250
Forfeiture of restricted common stock		(33)		33
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(800)
Issuance of directors restricted stock awards		175		(175)
[custom:StockIssuedDuringPeriodSharesDirectorsRestrictedStockAwards]	3,960
Stock based compensation-restricted stock awards				447		447
Balances at December 31, 2020 at Dec. 31, 2018	$ 281	43,770	60,339	(711)	(220)	103,459
Shares, Outstanding, Ending Balance at Dec. 31, 2018	2,806,781
Net income for year			11,136			11,136
Other comprehensive income, net of tax					1,577	1,577
Common stock dividends declared ($1.16 per share)			(3,155)			(3,155)
Stock options exercised		82				82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	4,725
Issuance of restricted common stock	$ 2	457		(459)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	11,530
Forfeiture of restricted common stock		(31)		31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(710)
Issuance of directors restricted stock awards		142		(142)
[custom:StockIssuedDuringPeriodSharesDirectorsRestrictedStockAwards]	3,600
Stock based compensation-restricted stock awards		70		486		556
Balances at December 31, 2020 at Dec. 31, 2019	$ 283	44,490	68,320	(795)	1,357	113,655
Shares, Outstanding, Ending Balance at Dec. 31, 2019	2,825,912
Retired Common Stock
Stock Repurchased and Retired During Period, Shares	(14)
Net income for year			11,940			11,940
Other comprehensive income, net of tax					1,647	1,647
Common stock dividends declared ($1.16 per share)			(3,286)			(3,286)
Stock options exercised		53				53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	3,105
Issuance of restricted common stock	$ 1	439		(440)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	12,275
Forfeiture of restricted common stock		(50)		50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(1,200)
Issuance of directors restricted stock awards		114		(114)
[custom:StockIssuedDuringPeriodSharesDirectorsRestrictedStockAwards]	3,200
Stock based compensation-restricted stock awards		218		525		743
Balances at December 31, 2020 at Dec. 31, 2020	$ 284	$ 45,264	$ 76,974	$ (774)	$ 3,004	$ 124,752
Shares, Outstanding, Ending Balance at Dec. 31, 2020	2,843,292