Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Surplus	Surplus Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance
Balance at beginning of period at Dec. 31, 2021	$ 148,956			$ 7,024		$ 64,437		$ 82,300			$ 3,293		$ (8,098)
Increase (Decrease) in Stockholders' Equity
Net income	16,025							16,025
Other comprehensive loss	(43,438)										(43,438)
Purchase of treasury stock	(2,892)												(2,892)
Stock dividend	0			260		6,605		(6,865)
Cash dividends declared, common stock	(3,246)							(3,246)
Balance at end of period at Sep. 30, 2022	115,405			7,284		71,042		88,214			(40,145)		(10,990)
Balance at beginning of period at Jun. 30, 2022	124,058			7,024		71,302		84,437			(27,715)		(10,990)
Increase (Decrease) in Stockholders' Equity
Net income	4,927							4,927
Other comprehensive loss	(12,430)										(12,430)
Stock dividend	0			260		(260)
Cash dividends declared, common stock	(1,150)							(1,150)
Balance at end of period at Sep. 30, 2022	115,405			7,284		71,042		88,214			(40,145)		(10,990)
Balance at beginning of period at Dec. 31, 2022	127,411	$ (5,581)	$ 121,830	7,284	$ 7,284	71,042	$ 71,042	91,789	$ (5,581)	$ 86,208	(31,714)	$ (31,714)	(10,990)	$ (10,990)
Increase (Decrease) in Stockholders' Equity
Net income	8,399							8,399
Other comprehensive loss	(8,327)										(8,327)
Stock dividend	0			271		5,734		(6,005)
Cash dividends declared, common stock	(3,498)							(3,498)
Balance at end of period at Sep. 30, 2023	118,404			7,555		76,776		85,104			(40,041)		(10,990)
Balance at beginning of period at Jun. 30, 2023	126,473			7,284		77,047		83,722			(30,590)		(10,990)
Increase (Decrease) in Stockholders' Equity
Net income	2,579							2,579
Other comprehensive loss	(9,451)										(9,451)
Stock dividend	0			271		(271)
Cash dividends declared, common stock	(1,197)							(1,197)
Balance at end of period at Sep. 30, 2023	$ 118,404			$ 7,555		$ 76,776		$ 85,104			$ (40,041)		$ (10,990)