Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2019

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, 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
Other securities		21,707		138		(72)		21,773
	$	206,962	$	4,068	$	(335)	$	210,695

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		(Losses)		Value
	(dollars in thousands)
December 31, 2018:
Securities HTM:
Municipal securities	$	400,863	$	5,661	$	(6,803)	$	399,721
Other securities		1,050		—		(1)		1,049
	$	401,913	$	5,661	$	(6,804)	$	400,770
Securities AFS:
U.S. govt. sponsored agency securities	$	37,150	$	39	$	(778)	$	36,411
Residential mortgage-backed and related securities		163,698		182		(4,631)		159,249
Municipal securities		59,069		180		(703)		58,546
Other securities		6,754		100		(4)		6,850
	$	266,671	$	501	$	(6,116)	$	261,056

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, 2019:
Securities HTM:
Municipal securities	$	509	$	(1)	$	10,047	$	(142)	$	10,556	$	(143)
Other securities		550		—		—		—		550		—
	$	1,059	$	(1)	$	10,047	$	(142)	$	11,106	$	(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)
Other securities		17,135		(72)		—		—		17,135		(72)
	$	20,829	$	(110)	$	20,703	$	(225)	$	41,532	$	(335)

	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, 2018:
Securities HTM:
Municipal securities	$	114,201	$	(2,187)	$	69,412	$	(4,616)	$	183,613	$	(6,803)
Other securities		549		(1)		—		—		549		(1)
	$	114,750	$	(2,188)	$	69,412	$	(4,616)	$	184,162	$	(6,804)
Securities AFS:
U.S. govt. sponsored agency securities	$	1,565	$	(34)	$	29,605	$	(744)	$	31,170	$	(778)
Residential mortgage-backed and related securities		12,810		(148)		133,535		(4,483)		146,345		(4,631)
Municipal securities		28,356		(394)		15,932		(309)		44,288		(703)
Other securities		4,249		(4)		—		—		4,249		(4)
	$	46,980	$	(580)	$	179,072	$	(5,536)	$	226,052	$	(6,116)

Realized gain (loss) on investments

	2019		2018		2017
	(dollars in thousands)
Proceeds from sales of securities	$	30,055	$	1,938	$	71,092
Gross gains from sales of securities		176		—		67
Gross losses from sales of securities		(206)		—		(155)

Investments classified by maturity date

	Amortized Cost		Fair Value
	(dollars in thousands)
Securities HTM:
Due in one year or less	$	3,220	$	3,234
Due after one year through five years		33,088		33,865
Due after five years		364,338		389,446
	$	400,646	$	426,545
Securities AFS:
Due in one year or less	$	1,084	$	1,084
Due after one year through five years		17,089		17,320
Due after five years		70,065		71,704
		88,238		90,108
Residential mortgage-backed and related securities		118,724		120,587
	$	206,962	$	210,695

Schedule of investment in callable securities

	Amortized Cost		Fair Value
	(dollars in thousands)
Securities HTM:
Municipal securities	$	182,653	$	186,631
Securities AFS:
Municipal securities		39,674		40,990
Other securities		4,500		4,638
	$	44,174	$	45,628