Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2020	$ 134,445	$ 2,328	$ 22,430	$ 106,644	$ 5,649	$ (2,606)
Balance (in shares) at Dec. 31, 2020		3,556,533
Net income	8,919			8,919
Other comprehensive income (loss), net of tax	(3,648)				(3,648)
Cash dividends declared	(2,489)			(2,489)
Stock issued in connection with dividend reinvestment and stock purchase plan	421	$ 8	413
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		12,143
Stock issued for employee stock purchase plan	75	$ 2	73
Stock issued for employee stock purchase plan (in shares)		2,744
Stock issued for options exercised	187	$ 4	183
Stock issued for options exercised (in shares)		6,517
Stock-based compensation expense	63		63
Treasury stock purchase	(633)					(633)
Treasury stock purchase (in shares)		(18,391)
Balance at Jun. 30, 2021	137,340	$ 2,342	23,162	113,074	2,001	(3,239)
Balance (in shares) at Jun. 30, 2021		3,559,546
Balance at Mar. 31, 2021	131,996	$ 2,335	22,781	110,451	(678)	(2,893)
Balance (in shares) at Mar. 31, 2021		3,559,169
Net income	3,869			3,869
Other comprehensive income (loss), net of tax	2,679				2,679
Cash dividends declared	(1,246)			(1,246)
Stock issued in connection with dividend reinvestment and stock purchase plan	214	$ 4	210
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		5,824
Stock issued for employee stock purchase plan	75	$ 2	73
Stock issued for employee stock purchase plan (in shares)		2,744
Stock issued for options exercised	56	$ 1	55
Stock issued for options exercised (in shares)		1,500
Stock-based compensation expense	43		43
Treasury stock purchase	(346)					(346)
Treasury stock purchase (in shares)		(9,691)
Balance at Jun. 30, 2021	137,340	$ 2,342	23,162	113,074	2,001	(3,239)
Balance (in shares) at Jun. 30, 2021		3,559,546
Balance at Dec. 31, 2021	$ 136,494	$ 2,350	23,683	118,163	(3,740)	(3,962)
Balance (in shares) at Dec. 31, 2021	3,553,629	3,553,629
Net income	$ 7,059			7,059
Other comprehensive income (loss), net of tax	(57,751)				(57,751)
Cash dividends declared	(2,560)			(2,560)
Stock issued in connection with dividend reinvestment and stock purchase plan	451	$ 9	442
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		13,979
Stock issued for employee stock purchase plan	67	$ 1	66
Stock issued for employee stock purchase plan (in shares)		2,286
Stock-based compensation expense	53		53
Treasury stock purchase	(75)					(75)
Treasury stock purchase (in shares)		(2,000)
Balance at Jun. 30, 2022	$ 83,738	$ 2,360	24,244	122,662	(61,491)	(4,037)
Balance (in shares) at Jun. 30, 2022	3,567,894	3,567,894
Balance at Mar. 31, 2022	$ 102,498	$ 2,354	23,928	120,594	(40,341)	(4,037)
Balance (in shares) at Mar. 31, 2022		3,557,806
Net income	3,349			3,349
Other comprehensive income (loss), net of tax	(21,150)				(21,150)
Cash dividends declared	(1,281)			(1,281)
Stock issued in connection with dividend reinvestment and stock purchase plan	224	$ 5	219
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		7,802
Stock issued for employee stock purchase plan	67	$ 1	66
Stock issued for employee stock purchase plan (in shares)		2,286
Stock-based compensation expense	31		31
Balance at Jun. 30, 2022	$ 83,738	$ 2,360	$ 24,244	$ 122,662	$ (61,491)	$ (4,037)
Balance (in shares) at Jun. 30, 2022	3,567,894	3,567,894