Note 3 - Securities (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Marketable Securities [Table Text Block]

	December 31, 2023
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Securities available for sale:
U.S. Treasury	$	131,731	$	—	$	7,964	$	123,767
Federal agencies and GSEs		76,702		3		4,472		72,233
Mortgage-backed and CMOs		292,590		1		35,827		256,764
State and municipal		45,999		—		3,577		42,422
Corporate		30,812		—		4,479		26,333
Total securities available for sale	$	577,834	$	4	$	56,319	$	521,519

(Dollars in thousands)	December 31, 2022
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Securities available for sale:
U.S. Treasury	$	152,033	$	—	$	12,606	$	139,427
Federal agencies and GSEs		90,363		4		7,019		83,348
Mortgage-backed and CMOs		336,393		1		42,301		294,093
State and municipal		69,023		12		5,312		63,723
Corporate		31,299		—		3,828		27,471
Total securities available for sale	$	679,111	$	17	$	71,066	$	608,062

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available for Sale
	Amortized
	Cost		Fair Value
Due in one year or less	$	66,221	$	64,528
Due after one year through five years		155,815		144,776
Due after five years through ten years		52,229		45,302
Due after ten years		10,979		10,148
Mortgage-backed and CMOs		292,590		256,765
	$	577,834	$	521,519

Realized Gain (Loss) on Investments [Table Text Block]

	For the Year Ended December 31,
	2023			2022		2021
Gross realized gains	$	55		$	—	$	35
Gross realized losses		(123	)		—		—
Proceeds from sales of securities		13,180			—		561

Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]

	Total				Less than 12 Months				12 Months or More
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
U.S. Treasury	$	123,767	$	7,964	$	—	$	—	$	123,767	$	7,964
Federal agencies and GSEs		71,975		4,472		210		—		71,765		4,472
Mortgage-backed and CMOs		256,615		35,827		111		2		256,504		35,825
State and municipal		42,377		3,577		1,621		15		40,756		3,562
Corporate		26,333		4,479		1,506		194		24,827		4,285
Total	$	521,067	$	56,319	$	3,448	$	211	$	517,619	$	56,108

	Total				Less than 12 Months				12 Months or More
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
U.S. Treasury	$	139,427	$	12,606	$	10,824	$	915	$	128,603	$	11,691
Federal agencies and GSEs		82,958		7,019		29,204		1,920		53,754		5,099
Mortgage-backed and CMOs		293,929		42,301		96,758		7,245		197,171		35,056
State and municipal		60,629		5,312		31,866		980		28,763		4,332
Corporate		27,471		3,828		18,991		2,556		8,480		1,272
Total	$	604,414	$	71,066	$	187,643	$	13,616	$	416,771	$	57,450