Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

(in thousands)	Amortized		Unrealized
December 31, 2024	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	198,182	$	33	$	-		$	198,215
Government sponsored enterprise obligations		88,895		110		(4,847	)		84,158
Mortgage backed securities - government agencies		696,767		-		(105,790	)		590,977
Obligations of states and political subdivisions		128,431		1		(14,198	)		114,234
Other		2,686		-		(156	)		2,530
Total available for sale debt securities	$	1,114,961	$	144	$	(124,991	)	$	990,114
December 31, 2023
U.S. Treasury and other U.S. Government obligations	$	119,931	$	-	$	(3,662	)	$	116,269
Government sponsored enterprise obligations		104,677		157		(4,987	)		99,847
Mortgage backed securities - government agencies		789,145		83		(101,189	)		688,039
Obligations of states and political subdivisions		136,579		5		(13,094	)		123,490
Other		3,821		-		(287	)		3,534
Total available for sale debt securities	$	1,154,153	$	245	$	(123,219	)	$	1,031,179

Debt Securities, Held-to-Maturity [Table Text Block]

(in thousands)	Carrying		Unrecognized
December 31, 2024	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	153,850	$	-	$	(741	)	$	153,109
Government sponsored enterprise obligations		25,395		-		(2,034	)		23,361
Mortgage backed securities - government agencies		190,926		2		(26,041	)		164,887
Total held to maturity debt securities	$	370,171	$	2	$	(28,816	)	$	341,357
December 31, 2023
U.S. Treasury and other U.S. Government obligations	$	203,259	$	-	$	(4,932	)	$	198,327
Government sponsored enterprise obligations		26,918		-		(2,457	)		24,461
Mortgage backed securities - government agencies		209,660		1		(23,930	)		185,731
Total held to maturity debt securities	$	439,837	$	1	$	(31,319	)	$	408,519

Investments Classified by Contractual Maturity Date [Table Text Block]

	AFS Debt Securities				HTM Debt Securities
(in thousands)	Amortized cost		Fair value		Carrying value		Fair value
Due within one year	$	201,548	$	201,552	$	151,882	$	151,207
Due after one year but within five years		36,543		34,910		2,638		2,555
Due after five years but within 10 years		94,672		81,754		24,251		22,250
Due after 10 years		85,431		80,921		474		458
Mortgage backed securities - government agencies		696,767		590,977		190,926		164,887
Total	$	1,114,961	$	990,114	$	370,171	$	341,357

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

	AFS Debt Securities
	Less than 12 months					12 months or more					Total
(in thousands)	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
December 31, 2024	value		losses			value		losses			value		losses
Government sponsored enterprise obligations	$	5,801	$	(49	)	$	74,478	$	(4,798	)	$	80,279	$	(4,847	)
Mortgage-backed securities - government agencies		23,159		(579	)		567,818		(105,211	)		590,977		(105,790	)
Obligations of states and political subdivisions		9,181		(164	)		101,407		(14,034	)		110,588		(14,198	)
Other		-		-			2,530		(156	)		2,530		(156	)
Total AFS debt securities	$	38,141	$	(792	)	$	746,233	$	(124,199	)	$	784,374	$	(124,991	)
December 31, 2023
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	116,269	$	(3,662	)	$	116,269	$	(3,662	)
Government sponsored enterprise obligations		-		-			83,675		(4,987	)		83,675		(4,987	)
Mortgage-backed securities - government agencies		16,346		(95	)		661,195		(101,094	)		677,541		(101,189	)
Obligations of states and political subdivisions		6,326		(64	)		105,179		(13,030	)		111,505		(13,094	)
Other		-		-			3,534		(287	)		3,534		(287	)
Total AFS debt securities	$	22,672	$	(159	)	$	969,852	$	(123,060	)	$	992,524	$	(123,219	)

	HTM Debt Securities
	Less than 12 months					12 months or more					Total
(in thousands)	Fair		Unrecognized			Fair		Unrecognized			Fair		Unrecognized
December 31, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	153,109	$	(741	)	$	153,109	$	(741	)
Government sponsored enterprise obligations		396		(6	)		22,965		(2,028	)		23,361		(2,034	)
Mortgage-backed securities - government agencies		-		-			164,724		(26,041	)		164,724		(26,041	)
Total HTM debt securities	$	396	$	(6	)	$	340,798	$	(28,810	)	$	341,194	$	(28,816	)
December 31, 2023
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	198,327	$	(4,932	)	$	198,327	$	(4,932	)
Government sponsored enterprise obligations		455		(1	)		23,967		(2,456	)		24,422		(2,457	)
Mortgage-backed securities - government agencies		-		-			185,504		(23,930	)		185,504		(23,930	)
Total HTM debt securities	$	455	$	(1	)	$	407,798	$	(31,318	)	$	408,253	$	(31,319	)