Note 2 - Investment Securities (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

(in thousands)	Amortized		Unrealized
June 30, 2023	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	122,927	$	-	$	(6,710	)	$	116,217
Government sponsored enterprise obligations		139,479		199		(6,103	)		133,575
Mortgage backed securities - government agencies		829,867		22		(117,177	)		712,712
Obligations of states and political subdivisions		142,086		1		(15,307	)		126,780
Other		3,890		-		(450	)		3,440
Total available for sale debt securities	$	1,238,249	$	222	$	(145,747	)	$	1,092,724
December 31, 2022
U.S. Treasury and other U.S. Government obligations	$	122,966	$	-	$	(7,927	)	$	115,039
Government sponsored enterprise obligations		149,773		290		(6,437	)		143,626
Mortgage backed securities - government agencies		874,265		58		(121,585	)		752,738
Obligations of states and political subdivisions		145,016		1		(17,418	)		127,599
Other		5,957		-		(342	)		5,615
Total available for sale debt securities	$	1,297,977	$	349	$	(153,709	)	$	1,144,617

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

(in thousands)	Carrying		Unrecognized
June 30, 2023	value		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	204,017	$	-	$	(8,678	)	$	195,339
Government sponsored enterprise obligations		27,127		-		(2,955	)		24,172
Mortgage backed securities - government agencies		218,885		-		(28,147	)		190,738
Total held to maturity debt securities	$	450,029	$	-	$	(39,780	)	$	410,249
December 31, 2022
U.S. Treasury and other U.S. Government obligations	$	217,794	$	-	$	(9,166	)	$	208,628
Government sponsored enterprise obligations		27,507		-		(2,559	)		24,948
Mortgage backed securities - government agencies		227,916		-		(29,659	)		198,257
Total held to maturity debt securities	$	473,217	$	-	$	(41,384	)	$	431,833

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	$	37,631	$	37,337	$	51,134	$	49,821
Due after one year but within five years		155,874		147,197		153,477		146,073
Due after five years but within 10 years		69,673		61,354		25,955		23,049
Due after 10 years		145,204		134,124		578		568
Mortgage backed securities - government agencies		829,867		712,712		218,885		190,738
Total	$	1,238,249	$	1,092,724	$	450,029	$	410,249

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
June 30, 2023	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	-	$	-		$	116,217	$	(6,710	)	$	116,217	$	(6,710	)
Government sponsored enterprise obligations		43,334		(107	)		74,092		(5,996	)		117,426		(6,103	)
Mortgage-backed securities - government agencies		114,246		(5,479	)		595,295		(111,698	)		709,541		(117,177	)
Obligations of states and political subdivisions		16,530		(242	)		106,563		(15,065	)		123,093		(15,307	)
Other		-		-			3,440		(450	)		3,440		(450	)
Total AFS debt securities	$	174,110	$	(5,828	)	$	895,607	$	(139,919	)	$	1,069,717	$	(145,747	)
December 31, 2022
U.S. Treasury and other U.S.
Government obligations	$	3,025	$	(57	)	$	111,966	$	(7,870	)	$	114,991	$	(7,927	)
Government sponsored enterprise obligations		99,785		(3,553	)		22,484		(2,884	)		122,269		(6,437	)
Mortgage-backed securities - government agencies		180,263		(11,114	)		567,988		(110,471	)		748,251		(121,585	)
Obligations of states and political subdivisions		64,165		(3,763	)		56,864		(13,655	)		121,029		(17,418	)
Other		4,865		(213	)		749		(129	)		5,614		(342	)
Total AFS debt securities	$	352,103	$	(18,700	)	$	760,051	$	(135,009	)	$	1,112,154	$	(153,709	)

	HTM Debt Securities
	Less than 12 months					12 months or more					Total
(in thousands)	Fair		Unrecognized			Fair		Unrecognized			Fair		Unrecognized
June 30, 2023	value		losses			value		losses			value		losses
U.S. Treasury and other U.S.
Government obligations	$	-	$	-		$	195,339	$	(8,678	)	$	195,339	$	(8,678	)
Government sponsored enterprise obligations		1,502		(4	)		22,670		(2,951	)		24,172		(2,955	)
Mortgage-backed securities - government agencies		57		(3	)		190,681		(28,144	)		190,738		(28,147	)
Total HTM debt securities	$	1,559	$	(7	)	$	408,690	$	(39,773	)	$	410,249	$	(39,780	)
December 31, 2022
U.S. Treasury and other U.S.
Government obligations	$	208,628	$	(9,166	)	$	-	$	-		$	208,628	$	(9,166	)
Government sponsored enterprise obligations		24,948		(2,559	)		-		-			24,948		(2,559	)
Mortgage-backed securities - government agencies		198,257		(29,659	)		-		-			198,257		(29,659	)
Total HTM debt securities	$	431,833	$	(41,384	)	$	-	$	-		$	431,833	$	(41,384	)