Investment Securities (Tables)

3 Months Ended

Mar. 31, 2020

Securities Financing Transactions Disclosures [Abstract]

Unrealized Gain (Loss) on Investments

The amortized cost, fair value, and unrealized gains and losses on investment securities at March 31, 2020 and December 31, 2019 are as follows:

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
March 31, 2020
Available-for-sale debt securities:
Mortgage-backed U.S. government agencies	$	3,671	$	6	$	15	$	3,662
State and political subdivision obligations		16,092		27		1		16,118
Corporate debt securities		7,633		13		6		7,640
Total available-for-sale debt securities		27,396		46		22		27,420
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies	$	68,321	$	288	$	18	$	68,591
Mortgage-backed U.S. government agencies		44,940		916		24		45,832
State and political subdivision obligations		50,603		1,295		78		51,820
Corporate debt securities		4,099		57		—		4,156
Total held-to-maturity debt securities		167,963		2,556		120		170,399
Total	$	195,359	$	2,602	$	142	$	197,819

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2019
Available-for-sale debt securities:
U.S. government agencies	$	22,894	$	6	$	70	$	22,830
Mortgage-backed U.S. government agencies		12,996		7		113		12,890
State and political subdivision obligations		30		—		—		30
Corporate debt securities		1,250		9		—		1,259
Total available-for-sale debt securities		37,170		22		183		37,009
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies	$	50,210	$	46	$	220	$	50,036
Mortgage-backed U.S. government agencies		42,098		95		102		42,091
State and political subdivision obligations		44,169		1,193		13		45,349
Total held-to-maturity debt securities		136,477		1,334		335		137,476
Total	$	173,647	$	1,356	$	518	$	174,485

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

The following tables present gross unrealized losses and fair value of debt security investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2020 and December 31, 2019.

(Dollars in thousands)	Less Than 12 Months					12 Months or More					Total
	Number					Number					Number
	of	Fair		Unrealized		of	Fair		Unrealized		of	Fair		Unrealized
March 31, 2020	Securities	Value		Losses		Securities	Value		Losses		Securities	Value		Losses
Available-for-sale debt securities:
Mortgage-backed U.S. government agencies	1	$	2,573	$	13	1	$	200	$	2	2	$	2,773	$	15
State and political subdivision obligations	1		2,962		1	0		—		—	1		2,962		1
Corporate debt securities	2		3,893		6	0		—		—	2		3,893		6
Total temporarily impaired available-for-sale debt securities	4	$	9,428	$	20	1	$	200	$	2	5	$	9,628	$	22
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies	4	$	5,507	$	18	0	$	—	$	—	4	$	5,507	$	18
Mortgage-backed U.S. government agencies	2		1,960		18	2		1,358		6	4		3,318		24
State and political subdivision obligations	8		5,332		78	0		—		—	8		5,332		78
Total temporarily impaired held-to-maturity debt securities	14	$	12,799	$	114	2	$	1,358	$	6	16	$	14,157	$	120
Total	18	$	22,227	$	134	3	$	1,558	$	8	21	$	23,785	$	142

(Dollars in thousands)	Less Than 12 Months					12 Months or More						Total
	Number					Number						Number
	of	Fair		Unrealized		of	Fair		Unrealized			of	Fair		Unrealized
December 31, 2019	Securities	Value		Losses		Securities	Value		Losses			Securities	Value		Losses
Available-for-sale securities:
U.S. government agencies	4	$	4,652	$	24	7	$	11,982		$	46	11	$	16,634	$	70
Mortgage-backed U.S. government agencies	1		1,643		4	14		10,603			109	15		12,246		113
Total temporarily impaired available-for-sale securities	5	$	6,295	$	28	21	$	22,585		$	155	26	$	28,880	$	183
Held-to-maturity securities:
U.S. Treasury and U.S. government agencies	18	$	29,024	$	219	1	$	2,999		$	1	19	$	32,023	$	220
Mortgage-backed U.S. government agencies	6		8,445		35	13		11,050			67	19		19,495		102
State and political subdivision obligations	3		1,383		13	0		—			—	3		1,383		13
Total temporarily impaired held to maturity securities	27	$	38,852	$	267	14	$	14,049		$	68	41	$	52,901	$	335
Total	32	$	45,147	$	295	35	$	36,634		$	223	67	$	81,781	$	518

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

Gross realized gains and losses on sales of available-for-sale debt securities for the three months ended March 31, 2020 and 2019 are shown in the table below.

(Dollars in thousands)	Three Months Ended March 31,
	2020				2019
Realized gains		$	137			$	26
Realized losses			(5	)			(19	)
Net gains		$	132			$	7

Investments Classified by Contractual Maturity Date

The table below illustrates the maturity distribution of investment securities at amortized cost and fair value as of March 31, 2020.

(Dollars in thousands)	Available-for-sale				Held-to-maturity
	Amortized		Fair		Amortized		Fair
March 31, 2020	Cost		Value		Cost		Value
Due in 1 year or less	$	—	$	—	$	5,907	$	5,953
Due after 1 year but within 5 years		7,982		8,012		15,378		15,751
Due after 5 years but within 10 years		7,599		7,598		96,184		97,347
Due after 10 years		8,144		8,148		5,554		5,516
		23,725		23,758		123,023		124,567
Mortgage-backed securities		3,671		3,662		44,940		45,832
	$	27,396	$	27,420	$	167,963	$	170,399