Investment Securities (Tables)

12 Months Ended

Dec. 31, 2021

Securities Financing Transactions Disclosures [Abstract]

Unrealized Gain (Loss) on Investments

The majority of the investment portfolio is comprised of securities issued by U.S. government agencies and state and political subdivision obligations.  The amortized cost, fair value, and unrealized gains and losses on investment securities at December 31, 2021 and December 31, 2020 are as follows:

(Dollars in thousands)
	Amortized		Unrealized		Unrealized		Fair
December 31, 2021	Cost		Gains		Losses		Value
Available for sale securities:
Mortgage-backed U.S. government agencies	$	49,760	$	3	$	283	$	49,480
State and political subdivision obligations		3,899		26		11		3,914
Corporate debt securities		9,525		—		57		9,468
Total available for sale securities		63,184		29		351		62,862
Held to maturity securities:
U.S. Treasury and U.S. government agencies		178,136		26		1,165		176,997
Mortgage-backed U.S. government agencies		61,157		440		272		61,325
State and political subdivision obligations		75,958		2,305		27		78,236
Corporate debt securities		14,006		133		71		14,068
Total held to maturity securities		329,257		2,904		1,535		330,626
Total	$	392,441	$	2,933	$	1,886	$	393,488

(Dollars in thousands)
	Amortized		Unrealized		Unrealized		Fair
December 31, 2020	Cost		Gains		Losses		Value
Available for sale securities:
Mortgage-backed U.S. government agencies	$	2	$	—	$	—	$	2
Corporate debt securities		5,750		—		4		5,746
Total available-for-sale debt securities		5,752		—		4		5,748
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies		11,511		66		—		11,577
Mortgage-backed U.S. government agencies		40,810		948		15		41,743
State and political subdivision obligations		65,449		3,295		6		68,738
Corporate debt securities		10,522		215		1		10,736
Total held-to-maturity debt securities		128,292		4,524		22		132,794
Total	$	134,044	$	4,524	$	26	$	138,542

Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position

The following table presents gross unrealized losses and fair value of investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2021 and 2020.

(Dollars in thousands)	Less Than 12 Months					12 Months or More					Total
December 31, 2021	Number of Securities	Fair Value		Unrealized Losses		Number of Securities	Fair Value		Unrealized Losses		Number of Securities	Fair Value		Unrealized Losses
Available for sale securities:
Mortgage-backed    U.S. government agencies	24	$	45,476	$	283	0	$	—	$	—	24	$	45,476	$	283
State and political    subdivision obligations	2		1,168		11	0		—		—	2		1,168		11
Corporate debt securities	4		4,943		57	0		—		—	4		4,943		57
Total temporarily impaired    available for sale securities	30		51,587		351	0		—		—	30		51,587		351
Held to maturity securities:
U.S. Treasury and    U.S. government agencies	91	$	149,425	$	1,165	0	$	—	$	—	91	$	149,425	$	1,165
Mortgage-backed    U.S. government agencies	24		39,995		272	0		—		—	24		39,995		272
State and political    subdivision obligations	17		5,302		25	1		255		2	18		5,557		27
Corporate debt securities	6		6,928		71	0		—		—	6		6,928		71
Total temporarily impaired    held to maturity securities	138		201,650		1,533	1		255		2	139		201,905		1,535
Total	168	$	253,237	$	1,884	1	$	255	$	2	169	$	253,492	$	1,886
(Dollars in thousands)	Less Than 12 Months					12 Months or More					Total
December 31, 2020	Number of Securities	Fair Value		Unrealized Losses		Number of Securities	Fair Value		Unrealized Losses		Number of Securities	Fair Value		Unrealized Losses
Available for sale securities:
Corporate debt securities	2	$	3,497	$	4	0	$	—	$	—	2	$	3,497	$	4
Total temporarily impaired    available for sale securities	2		3,497		4	0		—		—	2		3,497		4
Held to maturity securities:
Mortgage-backed    U.S. government agencies	8	$	5,336	$	15	0	$	—	$	—	8	$	5,336	$	15
State and political    subdivision obligations	2		801		6	0		—		—	2		801		6
Corporate debt securities	1		449		1	0		—		—	1		449		1
Total temporarily impaired    held to maturity securities	11		6,586		22	0		—		—	11		6,586		22
Total	13	$	10,083	$	26	0	$	—	$	—	13	$	10,083	$	26

Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Securities

Gross realized gains and losses on sales of available-for-sale securities for the years ended December 31, 2021, 2020, and 2019 are shown in the table below.

(Dollars in thousands)	For the year ended December 31,
	2021		2020				2019
Realized gains	$	79	$	479		$	1,951
Realized losses		—		(12	)		(73	)
Net gains	$	79	$	467		$	1,878

Investments Classified by Contractual Maturity Date

The table below illustrates the maturity distribution of investment securities at amortized cost and fair value at December 31, 2021.

(Dollars in thousands)	Available for Sale				Held to Maturity
	Amortized		Fair		Amortized		Fair
December 31, 2021	Cost		Value		Cost		Value
Due in 1 year or less	$	250	$	250	$	3,949	$	3,965
Due after 1 year but within 5 years		3,000		2,967		53,357		54,691
Due after 5 years but within 10 years		6,576		6,554		188,839		188,687
Due after 10 years		3,598		3,611		21,955		21,958
		13,424		13,382		268,100		269,301
Mortgage-backed securities		49,760		49,480		61,157		61,325
	$	63,184	$	62,862	$	329,257	$	330,626