Note 3 - Investment Securities (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

										Allowance
										for
			Gross		Gross					Investment
	Amortized		Unrealized		Unrealized			Fair		Credit
	Cost		Gains		Losses			Value		Losses
	(dollars in thousands)
September 30, 2022
Securities available-for-sale
Federal agency obligations	$	55,896	$	-	$	(10,276	)	$	45,620	$	-
Residential mortgage pass-through securities		468,783		-		(61,798	)		406,985		-
Commercial mortgage pass-through securities		25,546		-		(4,651	)		20,895		-
Obligations of U.S. states and political subdivisions		159,441		46		(18,380	)		141,107		-
Corporate bonds and notes		6,998		-		(8	)		6,990		-
Asset-backed securities		1,934		-		(36	)		1,898
Other securities		134		-		-			134		-
Total securities available-for-sale	$	718,732	$	46	$	(95,149	)	$	623,629	$	-
December 31, 2021
Securities available-for-sale
Federal agency obligations	$	50,336	$	649	$	(625	)	$	50,360	$	-
Residential mortgage pass-through securities		317,111		1,868		(2,884	)		316,095		-
Commercial mortgage pass-through securities		10,814		118		(463	)		10,469		-
Obligations of U.S. states and political subdivisions		145,045		1,562		(982	)		145,625		-
Corporate bonds and notes		8,968		81		-			9,049		-
Asset-backed securities		2,563		3		(2	)		2,564		-
Certificates of deposit		150		-		-			150		-
Other securities		195		-		-			195		-
Total securities available-for-sale	$	535,182	$	4,281	$	(4,956	)	$	534,507	$	-

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30, 2022
	Amortized		Fair
	Cost		Value
	(dollars in thousands)
Securities available-for-sale:
Due in one year or less	$	5,451	$	5,444
Due after one year through five years		4,106		4,107
Due after five years through ten years		2,342		2,289
Due after ten years		212,370		183,775
Residential mortgage pass-through securities		468,783		406,985
Commercial mortgage pass-through securities		25,546		20,895
Other securities		134		134
Total securities available-for-sale	$	718,732	$	623,629

Schedule of Realized Gain (Loss) [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2022		2021		2022		2021
	(dollars in thousands)
Proceeds	$	-	$	-	$	-	$	5,185
Gross gains on sales/redemptions of securities		-		-		-		195
Gross losses on sales/redemptions of securities		-		-		-		-
Net gain on sales/redemptions of securities		-		-		-		195
Less: tax provision on net gain		-		-		-		(48	)
Net gain on sales/redemptions of securities, after taxes	$	-	$	-	$	-	$	147

Schedule of Unrealized Loss on Investments [Table Text Block]

	September 30, 2022
	Total					Less than 12 Months					12 Months or Longer
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
	(dollars in thousands)
Securities available-for-sale:
Federal agency obligations	$	45,620	$	(10,276	)	$	30,535	$	(4,261	)	$	15,085	$	(6,015	)
Residential mortgage pass-through securities		406,984		(61,798	)		293,070		(32,342	)		113,914		(29,456	)
Commercial mortgage pass-through securities		20,895		(4,651	)		15,961		(2,943	)		4,934		(1,708	)
Obligations of U.S. states and political subdivisions		135,483		(18,380	)		81,466		(11,098	)		54,017		(7,282	)
Corporate bonds and notes		2,991		(8	)		2,991		(8	)		-		-
Asset-backed securities		1,898		(36	)		1,242		(16	)		656		(20	)
Total temporarily impaired securities	$	613,871	$	(95,149	)	$	425,265	$	(50,668	)	$	188,606	$	(44,481	)

	December 31, 2021
	Total					Less than 12 Months					12 Months or Longer
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
	(dollars in thousands)
Securities available-for-sale:
Federal agency obligations	$	28,974	$	(625	)	$	28,974	$	(625	)	$	-	$	-
Residential mortgage pass-through securities		246,396		(2,884	)		214,701		(2,111	)		31,695		(773	)
Commercial mortgage pass-through securities		8,370		(463	)		4,682		(75	)		3,688		(388	)
Obligations of U.S. states and political subdivisions		89,473		(982	)		89,473		(982	)		-		-
Asset-backed securities		802		(2	)		802		(2	)		-		-
Total Temporarily Impaired Securities	$	374,015	$	(4,956	)	$	338,632	$	(3,795	)	$	35,383	$	(1,161	)