Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Amortized cost and fair value of investment securities

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		(Losses)		Value
	(dollars in thousands)
December 31, 2020:
Securities HTM:
Municipal securities	$	475,115	$	45,360	$	(248)	$	520,227
Other securities		1,050		—		—		1,050
	$	476,165	$	45,360	$	(248)	$	521,277
Securities AFS:
U.S. govt. sponsored agency securities	$	14,936	$	447	$	(47)	$	15,336
Residential mortgage-backed and related securities		127,670		5,510		(338)		132,842
Municipal securities		147,241		5,215		(48)		152,408
Asset-backed securities		39,663		1,111		(91)		40,683
Other securities		20,550		147		—		20,697
	$	350,060	$	12,430	$	(524)	$	361,966

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		(Losses)		Value
	(dollars in thousands)
December 31, 2019:
Securities HTM:
Municipal securities	$	399,596	$	26,042	$	(143)	$	425,495
Other securities		1,050		—		—		1,050
	$	400,646	$	26,042	$	(143)	$	426,545
Securities AFS:
U.S. govt. sponsored agency securities	$	19,872	$	283	$	(77)	$	20,078
Residential mortgage-backed and related securities		118,724		2,045		(182)		120,587
Municipal securities		46,659		1,602		(4)		48,257
Asset-backed securities		16,958		—		(71)		16,887
Other securities		4,749		138		(1)		4,886
	$	206,962	$	4,068	$	(335)	$	210,695

Securities have been in a continuous unrealized loss position

	Less than 12 Months				12 Months or More				Total
			Gross				Gross				Gross
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(dollars in thousands)
December 31, 2020:
Securities HTM:
Municipal securities	$	8,407	$	(248)	$	—	$	—	$	8,407	$	(248)
Securities AFS:
U.S. govt. sponsored agency securities	$	3,199	$	(47)	$	—	$	—	$	3,199	$	(47)
Residential mortgage-backed and related securities		37,549		(338)		—		—		37,549		(338)
Municipal securities		10,110		(48)		—		—		10,110		(48)
Asset-backed securities		6,884		(52)		9,945		(39)		16,829		(91)
	$	57,742	$	(485)	$	9,945	$	(39)	$	67,687	$	(524)

	Less than 12 Months				12 Months or More				Total
			Gross				Gross				Gross
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(dollars in thousands)
December 31, 2019:
Securities HTM:
Municipal securities	$	509	$	(1)	$	10,047	$	(142)	$	10,556	$	(143)
Securities AFS:
U.S. govt. sponsored agency securities	$	1,431	$	(21)	$	2,117	$	(56)	$	3,548	$	(77)
Residential mortgage-backed and related securities		2,263		(17)		17,862		(165)		20,125		(182)
Municipal securities		—		—		724		(4)		724		(4)
Asset-backed securities		16,886		(71)		—		—		16,886		(71)
Other securities		249		(1)		—		—		249		(1)
	$	20,829	$	(110)	$	20,703	$	(225)	$	41,532	$	(335)

Realized gain (loss) on investments

	2020		2019		2018
	(dollars in thousands)
Proceeds from sales of securities	$	38,562	$	30,055	$	1,938
Gross gains from sales of securities		2,553		176		—
Gross losses from sales of securities		(69)		(206)		—

Investments classified by maturity date

	Amortized Cost		Fair Value
	(dollars in thousands)
Securities HTM:
Due in one year or less	$	3,417	$	3,443
Due after one year through five years		34,396		35,103
Due after five years		438,352		482,731
	$	476,165	$	521,277
Securities AFS:
Due in one year or less	$	2,369	$	2,373
Due after one year through five years		13,970		14,328
Due after five years		166,388		171,740
		182,727		188,441
Residential mortgage-backed and related securities		127,670		132,842
Asset-backed securities		39,663		40,683
	$	350,060	$	361,966

Schedule of investment in callable securities

	Amortized Cost		Fair Value
	(dollars in thousands)
Securities HTM:
Municipal securities	$	227,773	$	236,134
Securities AFS:
Municipal securities		138,688		143,536
Other securities		6,500		6,647
	$	145,188	$	150,183