Note 2 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

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

(in thousands)	Amortized		Unrealized
March 31, 2024	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	119,955	$	-	$	(2,477	)	$	117,478
Government sponsored enterprise obligations		96,057		149		(5,310	)		90,896
Mortgage backed securities - government agencies		768,003		16		(107,399	)		660,620
Obligations of states and political subdivisions		135,318		3		(14,064	)		121,257
Other		3,786		-		(229	)		3,557
Total available for sale debt securities	$	1,123,119	$	168	$	(129,479	)	$	993,808
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
March 31, 2024	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	153,383	$	-	$	(4,190	)	$	149,193
Government sponsored enterprise obligations		26,756		-		(2,639	)		24,117
Mortgage backed securities - government agencies		205,265		-		(26,706	)		178,559
Total held to maturity debt securities	$	385,404	$	-	$	(33,535	)	$	351,869
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	$	127,223	$	124,656	$	151,432	$	147,357
Due after one year but within five years		37,397		35,288		2,656		2,511
Due after five years but within 10 years		79,825		69,940		25,539		22,941
Due after 10 years		110,671		103,304		512		501
Mortgage backed securities - government agencies		768,003		660,620		205,265		178,559
Total	$	1,123,119	$	993,808	$	385,404	$	351,869

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
March 31, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	117,478	$	(2,477	)	$	117,478	$	(2,477	)
Government sponsored enterprise obligations		4,759		(12	)		80,067		(5,298	)		84,826		(5,310	)
Mortgage-backed securities - government agencies		10,421		(113	)		647,067		(107,286	)		657,488		(107,399	)
Obligations of states and political subdivisions		10,844		(101	)		104,919		(13,963	)		115,763		(14,064	)
Other		-		-			3,557		(229	)		3,557		(229	)
Total AFS debt securities	$	26,024	$	(226	)	$	953,088	$	(129,253	)	$	979,112	$	(129,479	)
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
March 31, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	149,193	$	(4,190	)	$	149,193	$	(4,190	)
Government sponsored enterprise obligations		424		(1	)		23,681		(2,638	)		24,105		(2,639	)
Mortgage-backed securities - government agencies		204		(1	)		178,355		(26,705	)		178,559		(26,706	)
Total HTM debt securities	$	628	$	(2	)	$	351,229	$	(33,533	)	$	351,857	$	(33,535	)
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	)