Note 2 - Investment Securities (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

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

(in thousands)	Amortized		Unrealized
June 30, 2024	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	119,979	$	-	$	(1,104	)	$	118,875
Government sponsored enterprise obligations		93,747		147		(5,159	)		88,735
Mortgage backed securities - government agencies		740,453		-		(108,373	)		632,080
Obligations of states and political subdivisions		133,418		1		(15,009	)		118,410
Other		3,751		-		(223	)		3,528
Total available for sale debt securities	$	1,091,348	$	148	$	(129,868	)	$	961,628
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
June 30, 2024	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	153,536	$	-	$	(3,353	)	$	150,183
Government sponsored enterprise obligations		26,711		-		(2,637	)		24,074
Mortgage backed securities - government agencies		200,479		-		(26,850	)		173,629
Total held to maturity debt securities	$	380,726	$	-	$	(32,840	)	$	347,886
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	$	126,474	$	125,324	$	151,581	$	148,335
Due after one year but within five years		37,332		35,103		2,650		2,515
Due after five years but within 10 years		81,673		70,746		25,512		22,913
Due after 10 years		105,416		98,375		504		494
Mortgage backed securities - government agencies		740,453		632,080		200,479		173,629
Total	$	1,091,348	$	961,628	$	380,726	$	347,886

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
June 30, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	118,875	$	(1,104	)	$	118,875	$	(1,104	)
Government sponsored enterprise obligations		4,740		(3	)		78,008		(5,156	)		82,748		(5,159	)
Mortgage-backed securities - government agencies		11,317		(155	)		620,763		(108,218	)		632,080		(108,373	)
Obligations of states and political subdivisions		11,439		(371	)		103,010		(14,638	)		114,449		(15,009	)
Other		-		-			3,528		(223	)		3,528		(223	)
Total AFS debt securities	$	27,496	$	(529	)	$	924,184	$	(129,339	)	$	951,680	$	(129,868	)
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
June 30, 2024	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	150,183	$	(3,353	)	$	150,183	$	(3,353	)
Government sponsored enterprise obligations		-		-			23,644		(2,637	)		23,644		(2,637	)
Mortgage-backed securities - government agencies		202		-			173,427		(26,850	)		173,629		(26,850	)
Total HTM debt securities	$	202	$	-		$	347,254	$	(32,840	)	$	347,456	$	(32,840	)
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	)