CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Equity Bonus Plan	Private Placement	Cumulative effect of adoption of ASC Topic 326, net of tax	Preferred Stock $1,000 Par	Common Stock $1 Par	Common Stock $1 Par Equity Bonus Plan	Common Stock $1 Par Private Placement	Surplus	Surplus Equity Bonus Plan	Surplus Private Placement	Retained Earnings	Retained Earnings Cumulative effect of adoption of ASC Topic 326, net of tax	Accumulated Other Comprehensive Income/(Loss)
Beginning balance at Dec. 31, 2021	$ 223,889				$ 33,058	$ 10,717			$ 130,093			$ 56,654		$ (6,633)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,585											7,585
Other comprehensive income (loss)	(7,425)													(7,425)
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,715)											(1,715)
Ending balance at Mar. 31, 2022	221,752				33,058	10,717			130,093			61,942		(14,058)
Beginning balance at Dec. 31, 2021	223,889				33,058	10,717			130,093			56,654		(6,633)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,884
Other comprehensive income (loss)	(8,595)
Preferred stock dividends	(2,328)
Ending balance at Dec. 31, 2022	234,991			$ (7,900)	33,058	10,717			130,093			76,351	$ (7,900)	(15,228)
Beginning balance at Mar. 31, 2022	221,752				33,058	10,717			130,093			61,942		(14,058)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,124											8,124
Other comprehensive income (loss)	(1,043)													(1,043)
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,715)											(1,715)
Ending balance at Jun. 30, 2022	226,536				33,058	10,717			130,093			67,769		(15,101)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,053											8,053
Other comprehensive income (loss)	(855)													(855)
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,714)											(1,714)
Ending balance at Sep. 30, 2022	$ 231,438				33,058	10,717			130,093			73,526		(15,956)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 5,122											5,122
Other comprehensive income (loss)	728													728
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,715)											(1,715)
Ending balance at Dec. 31, 2022	234,991			(7,900)	33,058	10,717			130,093			76,351	(7,900)	(15,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,468											3,468
Other comprehensive income (loss)	414													414
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,715)											(1,715)
Ending balance at Mar. 31, 2023	228,676				33,058	10,717			130,093			69,622		(14,814)
Beginning balance at Dec. 31, 2022	234,991			$ (7,900)	33,058	10,717			130,093			76,351	$ (7,900)	(15,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,219
Other comprehensive income (loss)	2,269
Preferred stock dividends	(2,329)
Ending balance at Dec. 31, 2023	249,631				33,058	12,475			149,085			67,972		(12,959)
Beginning balance at Mar. 31, 2023	228,676				33,058	10,717			130,093			69,622		(14,814)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,676											2,676
Stock issued	10,000					714			9,286
Other comprehensive income (loss)	(84)													(84)
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,829)											(1,829)
Ending balance at Jun. 30, 2023	238,857				33,058	11,431			139,379			69,887		(14,898)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,772											1,772
Other comprehensive income (loss)	605													605
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,830)											(1,830)
Ending balance at Sep. 30, 2023	238,822				33,058	11,431			139,379			69,247		(14,293)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,303											1,303
Stock issued		$ 750	$ 10,000				$ 44	$ 1,000		$ 706	$ 9,000
Other comprehensive income (loss)	1,334													1,334
Preferred stock dividends	(582)											(582)
Cash dividends on common stock	(1,996)											(1,996)
Ending balance at Dec. 31, 2023	$ 249,631				$ 33,058	$ 12,475			$ 149,085			$ 67,972		$ (12,959)