Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Treasury Shares	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Total
Balance, beginning of period at Dec. 31, 2020	$ 15,983	$ (1,369)	$ 143,644	$ 129,703	$ 11,795	$ 299,756
Balance (in shares) at Dec. 31, 2020	15,982,815	70,831
Net income				23,246		23,246
Other comprehensive loss, net					(5,390)	(5,390)
Cash dividends declared on common stock				(13,234)		(13,234)
Shares issued for dividend reinvestment plan	$ 36	$ 415	803			1,254
Shares issued for dividend reinvestment plan (in shares)	36,368	(16,833)
Shares issued from treasury related to exercise of stock options		$ 240	(28)			212
Shares issued from treasury and redeemed related to exercise of stock options (in shares)		(12,414)
Restricted stock granted	$ 11	$ 1,308	(1,319)			0
Restricted stock granted (in shares)	10,989	(67,402)
Forfeiture of restricted stock		$ (102)	102			0
Forfeiture of restricted stock (in shares)		5,290
Stock-based compensation expense			970			970
Purchase of restricted stock for tax withholding		$ (174)				(174)
Purchase of restricted stock for tax withholding (in shares)		8,350
Treasury stock purchases		$ (7,238)				(7,238)
Treasury stock purchases (in shares)		292,100
Balance, end of period at Sep. 30, 2021	$ 16,030	$ (6,920)	144,172	139,715	6,405	299,402
Balance (in shares) at Sep. 30, 2021	16,030,172	279,922
Balance, beginning of period at Jun. 30, 2021	$ 16,030	$ (1,746)	143,817	136,756	9,276	304,133
Balance (in shares) at Jun. 30, 2021	16,030,172	72,660
Net income				7,399		7,399
Other comprehensive loss, net					(2,871)	(2,871)
Cash dividends declared on common stock				(4,440)		(4,440)
Shares issued for dividend reinvestment plan		$ 415	10			425
Shares issued for dividend reinvestment plan (in shares)		(16,833)
Shares issued from treasury related to exercise of stock options		$ 135				135
Shares issued from treasury and redeemed related to exercise of stock options (in shares)		(7,000)
Stock-based compensation expense			345			345
Purchase of restricted stock for tax withholding		$ (17)				(17)
Purchase of restricted stock for tax withholding (in shares)		691
Treasury stock purchases		$ (5,707)				(5,707)
Treasury stock purchases (in shares)		230,404
Balance, end of period at Sep. 30, 2021	$ 16,030	$ (6,920)	144,172	139,715	6,405	299,402
Balance (in shares) at Sep. 30, 2021	16,030,172	279,922
Balance, beginning of period at Dec. 31, 2021	$ 16,030	$ (6,716)	144,453	142,612	5,026	301,405
Balance (in shares) at Dec. 31, 2021	16,030,172	271,082
Net income				18,839		18,839
Other comprehensive loss, net					(61,495)	(61,495)
Cash dividends declared on common stock				(13,147)		(13,147)
Shares issued for dividend reinvestment plan		$ 1,216	10			1,226
Shares issued for dividend reinvestment plan (in shares)		(49,221)
Shares issued from treasury related to exercise of stock options		$ 175	(34)			141
Shares issued from treasury and redeemed related to exercise of stock options (in shares)		(7,024)
Restricted stock granted		$ 1,932	(1,932)			0
Restricted stock granted (in shares)		(78,243)
Forfeiture of restricted stock		$ (228)	228			0
Forfeiture of restricted stock (in shares)		10,782
Stock-based compensation expense			1,169			1,169
Purchase of restricted stock for tax withholding		$ (175)				(175)
Purchase of restricted stock for tax withholding (in shares)		6,964
Treasury stock purchases		$ (9,174)				(9,174)
Treasury stock purchases (in shares)		375,416
Balance, end of period at Sep. 30, 2022	$ 16,030	$ (12,970)	143,894	148,304	(56,469)	238,789
Balance (in shares) at Sep. 30, 2022	16,030,172	529,756
Balance, beginning of period at Jun. 30, 2022	$ 16,030	$ (13,013)	143,417	148,187	(36,002)	258,619
Balance (in shares) at Jun. 30, 2022	16,030,172	530,958
Net income				4,455		4,455
Other comprehensive loss, net					(20,467)	(20,467)
Cash dividends declared on common stock				(4,338)		(4,338)
Shares issued for dividend reinvestment plan		$ 392	8			400
Shares issued for dividend reinvestment plan (in shares)		(16,019)
Forfeiture of restricted stock		$ (81)	81			0
Forfeiture of restricted stock (in shares)		3,638
Stock-based compensation expense			388			388
Purchase of restricted stock for tax withholding		$ (22)				(22)
Purchase of restricted stock for tax withholding (in shares)		910
Treasury stock purchases		$ (246)				(246)
Treasury stock purchases (in shares)		10,269
Balance, end of period at Sep. 30, 2022	$ 16,030	$ (12,970)	$ 143,894	$ 148,304	$ (56,469)	$ 238,789
Balance (in shares) at Sep. 30, 2022	16,030,172	529,756