Note 3 - Investment Securities (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

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

(in thousands)	Amortized		Unrealized
September 30, 2022	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	122,805	$	-	$	(8,379	)	$	114,426
Government sponsored enterprise obligations		157,598		370		(6,669	)		151,299
Mortgage backed securities - government agencies		883,386		2		(132,799	)		750,589
Obligations of states and political subdivisions		147,385		1		(20,171	)		127,215
Other		5,989		-		(345	)		5,644
Total available for sale debt securities	$	1,317,163	$	373	$	(168,363	)	$	1,149,173
December 31, 2021
U.S. Treasury and other U.S. Government obligations	$	123,753	$	-	$	(1,252	)	$	122,501
Government sponsored enterprise obligations		132,760		2,497		(236	)		135,021
Mortgage backed securities - government agencies		857,283		2,495		(13,154	)		846,624
Obligations of states and political subdivisions		75,488		289		(702	)		75,075
Other		1,095		-		(18	)		1,077
Total available for sale debt securities	$	1,190,379	$	5,281	$	(15,362	)	$	1,180,298

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

(in thousands)	Carrying		Unrecognized
September 30, 2022	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	217,684	$	-	$	(9,673	)	$	208,011
Government sponsored enterprise obligations		27,666		2		(2,498	)		25,170
Mortgage backed securities - government agencies		232,775		-		(32,585	)		200,190
Total available for sale debt securities	$	478,125	$	2	$	(44,756	)	$	433,371

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	$	34,464	$	34,211	$	14,078	$	13,804
Due after one year but within five years		157,245		147,011		203,124		193,712
Due after five years but within 10 years		69,127		59,766		26,333		23,887
Due after 10 years		172,941		157,596		1,815		1,778
Mortgage backed securities - government agencies		883,386		750,589		232,775		200,190
Total available for sale debt securities	$	1,317,163	$	1,149,173	$	478,125	$	433,371

Schedule of Unrealized 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
September 30, 2022	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	21,554	$	(1,391	)	$	92,872	$	(6,988	)	$	114,426	$	(8,379	)
Government sponsored enterprise obligations		96,995		(4,999	)		16,589		(1,670	)		113,584		(6,669	)
Mortgage-backed securities - government agencies		288,778		(33,664	)		461,306		(99,135	)		750,084		(132,799	)
Obligations of states and political subdivisions		98,599		(14,002	)		25,924		(6,169	)		124,523		(20,171	)
Other		4,880		(205	)		764		(140	)		5,644		(345	)
Total AFS debt securities	$	510,806	$	(54,261	)	$	597,455	$	(114,102	)	$	1,108,261	$	(168,363	)
December 31, 2021
U.S. Treasury and other U.S. Government obligations	$	122,501	$	(1,252	)	$	-	$	-		$	122,501	$	(1,252	)
Government sponsored enterprise obligations		23,789		(223	)		447		(13	)		24,236		(236	)
Mortgage-backed securities - government agencies		615,130		(10,027	)		102,637		(3,127	)		717,767		(13,154	)
Obligations of states and political subdivisions		46,493		(686	)		484		(16	)		46,977		(702	)
Other		957		(18	)		-		-			957		(18	)
Total AFS debt securities	$	808,870	$	(12,206	)	$	103,568	$	(3,156	)	$	912,438	$	(15,362	)

	HTM Debt Securities
	Less than 12 months					12 months or more				Total
(in thousands)	Fair		Unrecognized			Fair		Unrecognized		Fair		Unrecognized
September 30, 2022	value		losses			value		losses		value		losses
U.S. Treasury and other U.S. Government obligations	$	208,011	$	(9,673	)	$	-	$	-	$	208,011	$	(9,673	)
Government sponsored enterprise obligations		23,374		(2,498	)		-		-		23,374		(2,498	)
Mortgage-backed securities - government agencies		200,190		(32,585	)		-		-		200,190		(32,585	)
Total HTM debt securities	$	431,575	$	(44,756	)	$	-	$	-	$	431,575	$	(44,756	)