Note 2 - Securities (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Marketable Securities [Table Text Block]

	March 31, 2023
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Securities available for sale:
U.S. Treasury	$	151,957	$	—	$	10,405	$	141,552
Federal agencies and GSEs		89,934		3		5,664		84,273
Mortgage-backed and CMOs		324,430		2		38,201		286,231
State and municipal		51,164		—		4,255		46,909
Corporate		31,301		—		3,859		27,442
Total securities available for sale	$	648,786	$	5	$	62,384	$	586,407

	December 31, 2022
	Amortized Cost		Unrealized Gains		Unrealized 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

Schedule of Cost of Investments in Restricted Stock [Table Text Block]

	March 31, 2023		December 31, 2022
FRB stock	$	6,556	$	6,545
FHLB stock		2,763		6,106
Total restricted stock	$	9,319	$	12,651

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

	Total				Less than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury	$	141,552	$	10,405	$	—	$	—	$	141,552	$	10,405
Federal agencies and GSEs		83,941		5,664		15,187		346		68,754		5,318
Mortgage-backed and CMOs		285,938		38,201		22,631		596		263,307		37,605
State and municipal		46,062		4,255		9,841		118		36,221		4,137
Corporate		27,442		3,859		5,140		411		22,302		3,448
Total	$	584,935	$	62,384	$	52,799	$	1,471	$	532,136	$	60,913

	Total				Less than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized 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