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, 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			22,174			22,174
Net other comprehensive income (loss)				(1,618)		(1,618)
Stock dividend	$ 39	2,313				0
Stock dividend			(2,352)
Stock dividend (in shares)	38,559
Purchase of treasury stock					(894)	(894)
Restricted stock, executive and Board of Director awards		(257)			429	172
Restricted stock vesting		403				403
Forfeited restricted stock		3			(3)	0
Cash dividends			(5,529)			(5,529)
Balance at Sep. 30, 2021	$ 4,389	78,370	140,920	969	(15,681)	208,967
Balance (in shares) at Sep. 30, 2021	4,388,901
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			7,064			7,064
Net other comprehensive income (loss)				(641)		(641)
Purchase of treasury stock					(45)	(45)
Restricted stock, executive and Board of Director awards		(42)			70	28
Cash dividends			(1,858)			(1,858)
Balance at Sep. 30, 2021	$ 4,389	78,370	140,920	969	(15,681)	208,967
Balance (in shares) at Sep. 30, 2021	4,388,901
Balance at Dec. 31, 2021	$ 4,389	78,395	146,010	(155)	(16,147)	212,492
Balance (in shares) at Dec. 31, 2021	4,388,901
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			21,185			21,185
Net other comprehensive income (loss)				(35,700)		(35,700)
Stock dividend	$ 39	2,521				0
Stock dividend			(2,560)
Stock dividend (in shares)	38,786
Purchase of treasury stock					(1,279)	(1,279)
Restricted stock, executive and Board of Director awards		(221)			365	144
Restricted stock vesting		158				158
Sale of treasury stock to employees		6			106	112
Forfeited restricted stock		10			(10)	0
Cash dividends			(5,682)			(5,682)
Balance at Sep. 30, 2022	$ 4,428	80,869	158,953	(35,855)	(16,965)	191,430
Balance (in shares) at Sep. 30, 2022	4,427,687
Balance at Jun. 30, 2022	$ 4,428	80,892	153,315	(26,559)	(17,044)	195,032
Balance (in shares) at Jun. 30, 2022	4,427,687
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			7,544			7,544
Net other comprehensive income (loss)				(9,296)		(9,296)
Restricted stock, executive and Board of Director awards		(52)			52	0
Restricted stock vesting		16				16
Sale of treasury stock to employees		5			35	40
Forfeited restricted stock		8			(8)	0
Cash dividends			(1,906)			(1,906)
Balance at Sep. 30, 2022	$ 4,428	$ 80,869	$ 158,953	$ (35,855)	$ (16,965)	$ 191,430
Balance (in shares) at Sep. 30, 2022	4,427,687