Investment Securities (Tables)

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Fair Values of Investment Securities Available-for-sale

The following tables present amortized cost and fair values of investment securities available-for-sale as of the periods shown:


	June 30, 2022
(Dollars in thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss		Fair Value
United States government agency securities	$	53,885	$	58	$	(4,232)	$	49,711
United States sponsored mortgage-backed securities	72,074		—		(9,006)		63,068
United States treasury securities	111,963		—		(7,683)		104,280
Municipal securities	158,703		5,337		(19,516)		144,524
Corporate debt securities	6,794		7		(2)		6,799
Other debt securities	7,500		—		—		7,500
Total debt securities	410,919		5,402		(40,439)		375,882
Other securities	855		—		—		855
Total investment securities available-for-sale	$	411,774	$	5,402	$	(40,439)	$	376,737


	December 31, 2021
(Dollars in thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss		Fair Value
United States government agency securities	$	41,105	$	228	$	(896)	$	40,437
United States sponsored mortgage-backed securities	77,519		222		(1,633)		76,108
United States treasury securities	112,133		—		(1,744)		110,389
Municipal securities	171,044		4,334		(366)		175,012
Corporate debt securities	11,093		49		—		11,142
Other debt securities	7,500		—		—		7,500
Total debt securities	420,394		4,833		(4,639)		420,588
Other securities	878		—		—		878
Total investment securities available-for-sale	$	421,272	$	4,833	$	(4,639)	$	421,466

The following table presents amortized cost and fair values of available-for-sale debt securities by contractual maturity as of the period shown:


	June 30, 2022
(Dollars in thousands)	Amortized Cost		Fair Value
Within one year	$	5	$	5
After one year, but within five years	124,228		116,460
After five years, but within ten years	34,270		31,690
After ten years	252,416		227,727
Total	$	410,919	$	375,882

Investments in an Unrealized Loss Position

The following tables disclose the length of time that investments have remained in an unrealized loss position at June 30, 2022 and December 31, 2021:


	June 30, 2022
(Dollars in thousands)	Less than 12 months				12 months or more
Description and number of positions	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
United States government agency securities (31)	$	27,421	$	(1,585)	$	17,376	$	(2,647)
United States sponsored mortgage-backed securities (51)	21,091		(2,402)		41,978		(6,604)
United States treasury securities (24)	104,280		(7,683)		—		—
Municipal securities (150)	90,708		(18,121)		8,120		(1,395)
Corporate debt securities (3)	1,498		(2)		—		—

Total	$	244,998	$	(29,793)	$	67,474	$	(10,646)


	December 31, 2021
(Dollars in thousands)	Less than 12 months				12 months or more
Description and number of positions	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
United States government agency securities (21)	$	5,101	$	(77)	$	21,770	$	(819)
United States sponsored mortgage-backed securities (30)	55,354		(1,346)		7,845		(287)
United States treasury securities (24)	110,389		(1,744)		—		—
Municipal securities (53)	32,221		(270)		7,001		(96)

Total	$	203,065	$	(3,437)	$	36,616	$	(1,202)

Realized Gain (Loss) on Investments

The following table summarizes investment sales, related gains and losses and unrealized holding gains for the periods shown:


	Three Months Ended June 30,				Six Months Ended June 30,
(Dollars in thousands)	2022		2021		2022		2021
Proceeds from sales of available-for-sale securities	$	—	$	34,279	$	60,635	$	75,316
Gains, gross	—		1,708		717		2,864
Losses, gross	—		—		67		13

Proceeds from sales of equity securities	$	1,100	$	61	$	1,100	$	61
Gain, gross	100		5		100		5
Losses, gross	—		—		—		—

Unrealized holding gains (losses) on equity securities	(26)		699		(85)		1,214