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Note 3 - Securities (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

December 31, 2023		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. government agencies and corporations		$	353,904			$	-			$	42,060			$	311,844
States and political subdivisions			179,507				-				29,614				149,893
Mortgage-backed securities			156,875				-				6,724				150,151
Corporate debt securities			6,504				-				754				5,750
U.S. treasury			996				-				33				963
Total securities available for sale		$	697,786			$	-			$	79,185			$	618,601

December 31, 2022		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. government agencies and corporations		$	391,538			$	39			$	55,002			$	336,575
States and political subdivisions			190,192				26				38,018				152,200
Mortgage-backed securities			170,694				22				9,239				161,477
Corporate debt securities			6,501				-				837				5,664
U.S. treasury			992				-				56				936
Total securities available for sale		$	759,917			$	87			$	103,152			$	656,852

Investments Classified by Contractual Maturity Date [Table Text Block]

December 31, 2023		Amortized Cost				Fair Value
Due in one year or less		$	3,795			$	3,748
Due after one year through five years			178,297				166,386
Due after five years through ten years			277,155				238,409
Due after ten years			238,539				210,058
Total securities available for sale		$	697,786			$	618,601

Gain (Loss) on Securities [Table Text Block]

December 31, 2023		Less Than 12 Months								12 Months or More
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
U.S. government agencies and corporations		$	-			$	-			$	311,844			$	42,060
State and political subdivisions			884				1				148,763				29,613
Mortgage-backed securities			1,616				26				147,922				6,698
Corporate debt securities			-				-				5,750				754
U.S. treasury			-				-				963				33
Total temporarily impaired securities		$	2,500			$	27			$	615,242			$	79,158

December 31, 2022		Less Than 12 Months								12 Months or More
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
U.S. Government agencies and corporations		$	144,574			$	12,699			$	190,950			$	42,303
State and political subdivisions			94,657				18,373				52,134				19,645
Mortgage-backed securities			144,198				7,326				15,165				1,913
Corporate debt securities			4,843				655				821				182
U.S. treasury			936				56				-				-
Total temporarily impaired securities		$	389,208			$	39,109			$	259,070			$	64,043

Schedule of Realized Gain (Loss) on Called Securities [Table Text Block]

		For the Year Ended December 31, 2023
		Proceeds				Book Value				Gross Gain				Gross Loss				Net Loss
Available for sale		$	43,518			$	46,850			$	137			$	3,469			$	3,332

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