Note 3 - Securities (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

December 31, 2024	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government agencies and corporations	$	351,136	$	-	$	40,012	$	311,124
States and political subdivisions		178,106		-		32,372		145,734
Mortgage-backed securities		143,747		24		5,473		138,298
Corporate debt securities		6,507		-		764		5,743
U.S. treasury		1,000		-		1		999
Total securities available for sale	$	680,496	$	24	$	78,622	$	601,898

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

Investments Classified by Contractual Maturity Date [Table Text Block]

	December 31, 2024
	Amortized Cost		Fair Value
Available for Sale:
Due in one year or less	$	33,945	$	33,681
Due after one year through five years		222,409		206,893
Due after five years through ten years		234,024		195,039
Due after ten years		190,118		166,285
Total securities available for sale	$	680,496	$	601,898

Gain (Loss) on Securities [Table Text Block]

December 31, 2024	Less Than 12 Months				12 Months or More
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
U.S. government agencies and corporations	$	-	$	-	$	311,124	$	40,012
State and political subdivisions		885		118		144,849		32,254
Mortgage-backed securities		5,336		28		115,011		5,445
Corporate debt securities		-		-		5,743		764
U.S. treasury		-		-		999		1
Total temporarily impaired securities	$	6,221	$	146	$	577,726	$	78,476

December 31, 2023	Less Than 12 Months				12 Months or More
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
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

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

	Sale of Available for Sale Securities
For the Year Ended December 31,	Proceeds		Book Value		Gross Gain		Gross Loss		Net Loss
2024	$	9,279	$	9,279	$	-	$	-	$	-
2023		43,518		46,850		137		3,469		3,332