Note 3 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

(in thousands)	Amortized		Unrealized
March 31, 2022	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	121,819	$	-	$	(5,481	)	$	116,338
Government sponsored enterprise obligations		126,467		525		(2,341	)		124,651
Mortgage backed securities - government agencies		820,452		137		(61,176	)		759,413
Obligations of states and political subdivisions		150,824		36		(7,025	)		143,835
Other		6,253		-		(135	)		6,118
Total available for sale debt securities	$	1,225,815	$	698	$	(76,158	)	$	1,150,355
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
March 31, 2022	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	277,491	$	-	$	(1,922	)	$	275,569
Government sponsored enterprise obligations		27,996		17		(195	)		27,818
Mortgage backed securities - government agencies		242,704		7		(10,291	)		232,420
Obligations of states and political subdivisions		-		-		-			-
Other		-		-		-			-
Total held to maturity debt securities	$	548,191	$	24	$	(12,408	)	$	535,807

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	$	8,688	$	8,668	$	60,025	$	60,024
Due after one year but within five years		160,345		154,123		217,974		216,038
Due after five years but within 10 years		56,839		54,292		26,679		26,515
Due after 10 years		179,491		173,859		809		810
Mortgage backed securities - government agencies		820,452		759,413		242,704		232,420
Total available for sale debt securities	$	1,225,815	$	1,150,355	$	548,191	$	535,807

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 months					12 months or more					Total
(in thousands)	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
March 31, 2022	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	116,338	$	(5,481	)	$	-	$	-		$	116,338	$	(5,481	)
Government sponsored enterprise obligations		94,099		(2,334	)		243		(7	)		94,342		(2,341	)
Mortgage-backed securities - government agencies		482,129		(33,441	)		263,942		(27,735	)		746,071		(61,176	)
Obligations of states and political subdivisions		122,102		(6,923	)		903		(102	)		123,005		(7,025	)
Other securities		6,118		(135	)		-		-			6,118		(135	)
Total	$	820,786	$	(48,314	)	$	265,088	$	(27,844	)	$	1,085,874	$	(76,158	)
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 securities		957		(18	)		-		-			957		(18	)
Total	$	808,870	$	(12,206	)	$	103,568	$	(3,156	)	$	912,438	$	(15,362	)