Note 2 - Investment Securities (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

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

(in thousands)	Amortized		Unrealized
September 30, 2024	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	19,999	$	-	$	(33	)	$	19,966
Government sponsored enterprise obligations		90,295		127		(3,527	)		86,895
Mortgage backed securities - government agencies		714,538		253		(82,543	)		632,248
Obligations of states and political subdivisions		130,055		5		(10,863	)		119,197
Other		3,719		-		(193	)		3,526
Total available for sale debt securities	$	958,606	$	385	$	(97,159	)	$	861,832
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
September 30, 2024	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	153,692	$	-	$	(1,539	)	$	152,153
Government sponsored enterprise obligations		25,726		-		(1,478	)		24,248
Mortgage backed securities - government agencies		195,494		3		(19,468	)		176,029
Total held to maturity debt securities	$	374,912	$	3	$	(22,485	)	$	352,430
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	$	25,215	$	25,144	$	151,741	$	150,265
Due after one year but within five years		35,528		34,296		2,644		2,565
Due after five years but within 10 years		94,000		84,166		24,542		23,092
Due after 10 years		89,325		85,978		491		479
Mortgage backed securities - government agencies		714,538		632,248		195,494		176,029
Total	$	958,606	$	861,832	$	374,912	$	352,430

Schedule of Unrealized Losses on Securities [Table Text Block]

	AFS Debt Securities
	Less than 12 months					12 months or more					Total
(in thousands)	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
September 30, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	19,966	$	(33	)	$	19,966	$	(33	)
Government sponsored enterprise obligations		5,916		(16	)		77,159		(3,511	)		83,075		(3,527	)
Mortgage-backed securities - government agencies		-		-			607,428		(82,543	)		607,428		(82,543	)
Obligations of states and political subdivisions		7,751		(69	)		100,646		(10,794	)		108,397		(10,863	)
Other		-		-			3,526		(193	)		3,526		(193	)
Total AFS debt securities	$	13,667	$	(85	)	$	808,725	$	(97,074	)	$	822,392	$	(97,159	)
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
September 30, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	152,153	$	(1,539	)	$	152,153	$	(1,539	)
Government sponsored enterprise obligations		402		(4	)		23,825		(1,474	)		24,227		(1,478	)
Mortgage-backed securities - government agencies		-		-			175,821		(19,468	)		175,821		(19,468	)
Total HTM debt securities	$	402	$	(4	)	$	351,799	$	(22,481	)	$	352,201	$	(22,485	)
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	)