CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2019	$ 3,939	$ 55,089	$ 110,800	$ (629)	$ (14,425)	$ 154,774
Balance (in shares) at Dec. 31, 2019	3,938,668
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			9,869			9,869
Net other comprehensive income (loss)				3,536		3,536
Stock dividend	$ 38	1,878				0
Stock dividend			(1,916)
Stock dividend (in shares)	38,318
Issuance of Common stock	$ 373	18,854				19,227
Issuance of Common stock (in shares)	373,356
Purchase of treasury stock					(1,502)	(1,502)
Restricted stock, executive and Board of Director awards		(233)			338	105
Restricted stock vesting		281				281
Cash dividend reinvestment paid from treasury stock		(6)	0		564	558
Cash dividends			(3,753)			(3,753)
Balance at Jun. 30, 2020	$ 4,350	75,863	115,000	2,907	(15,025)	183,095
Balance (in shares) at Jun. 30, 2020	4,350,342
Balance at Mar. 31, 2020	$ 3,939	55,129	113,374	2,918	(15,437)	159,923
Balance (in shares) at Mar. 31, 2020	3,938,668
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			5,338			5,338
Net other comprehensive income (loss)				(11)		(11)
Stock dividend	$ 38	1,878				0
Stock dividend			(1,916)
Stock dividend (in shares)	38,318
Issuance of Common stock	$ 373	18,854				19,227
Issuance of Common stock (in shares)	373,356
Purchase of treasury stock					(223)	(223)
Restricted stock, executive and Board of Director awards		(234)			326	92
Restricted stock vesting		241				241
Cash dividend reinvestment paid from treasury stock		(5)	0		309	304
Cash dividends			(1,796)			(1,796)
Balance at Jun. 30, 2020	$ 4,350	75,863	115,000	2,907	(15,025)	183,095
Balance (in shares) at Jun. 30, 2020	4,350,342
Balance at Dec. 31, 2020	$ 4,350	75,908	126,627	2,587	(15,213)	194,259
Balance (in shares) at Dec. 31, 2020	4,350,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			15,110			15,110
Net other comprehensive income (loss)				(977)		(977)
Stock dividend	$ 39	2,313				0
Stock dividend			(2,352)
Stock dividend (in shares)	38,559
Purchase of treasury stock					(849)	(849)
Restricted stock, executive and Board of Director awards		(215)			359	144
Restricted stock vesting		403				403
Forfeited restricted stock		3			(3)	0
Cash dividends			(3,671)			(3,671)
Balance at Jun. 30, 2021	$ 4,389	78,412	135,714	1,610	(15,706)	204,419
Balance (in shares) at Jun. 30, 2021	4,388,901
Balance at Mar. 31, 2021	$ 4,350	75,908	133,270	1,002	(15,723)	198,807
Balance (in shares) at Mar. 31, 2021	4,350,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,647			6,647
Net other comprehensive income (loss)				608		608
Stock dividend	$ 39	2,313				0
Stock dividend			(2,352)
Stock dividend (in shares)	38,559
Purchase of treasury stock					(336)	(336)
Restricted stock, executive and Board of Director awards		(207)			353	146
Restricted stock vesting		398				398
Cash dividends			(1,851)			(1,851)
Balance at Jun. 30, 2021	$ 4,389	$ 78,412	$ 135,714	$ 1,610	$ (15,706)	$ 204,419
Balance (in shares) at Jun. 30, 2021	4,388,901