Note 3 - Investment Securities (Tables)

6 Months Ended

Jun. 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)
June 30, 2022
Securities available-for-sale
Federal agency obligations	$	58,375	$	3	$	(5,708	)	$	52,670	$	-
Residential mortgage pass-through securities		480,445		718		(36,883	)		444,280		-
Commercial mortgage pass-through securities		25,627		-		(2,769	)		22,858		-
Obligations of U.S. states and political subdivisions		158,545		252		(10,766	)		148,031		-
Corporate bonds and notes		5,480		20		(9	)		5,491		-
Asset-backed securities		2,165		-		(48	)		2,117
Other securities		494		-		-			494		-
Total securities available-for-sale	$	731,131	$	993	$	(56,183	)	$	675,941	$	-
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]

	June 30, 2022
	Amortized		Fair
	Cost		Value
	(dollars in thousands)
Securities available-for-sale:
Due in one year or less	$	3,450	$	3,444
Due after one year through five years		4,876		4,880
Due after five years through ten years		3,765		3,788
Due after ten years		212,474		196,197
Residential mortgage pass-through securities		480,445		444,280
Commercial mortgage pass-through securities		25,627		22,858
Other securities		494		494
Total securities available-for-sale	$	731,131	$	675,941

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

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

Schedule of Unrealized Loss on Investments [Table Text Block]

	June 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	$	52,432	$	(5,708	)	$	52,432	$	(5,708	)	$	-	$	-
Residential mortgage pass-through securities		379,001		(36,883	)		325,284		(28,304	)		53,717		(8,579	)
Commercial mortgage pass-through securities		22,858		(2,769	)		19,209		(1,731	)		3,649		(1,038	)
Obligations of U.S. states and political subdivisions		109,547		(10,766	)		99,802		(10,214	)		9,745		(552	)
Corporate bonds and notes		1,989		(9	)		1,989		(9	)		-		-
Asset-backed securities		2,117		(48	)		2,117		(48	)		-		-
Total temporarily impaired securities	$	567,944	$	(56,183	)	$	500,833	$	(46,014	)	$	67,111	$	(10,169	)

	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	)