Investment Securities (Tables)

6 Months Ended

Jun. 30, 2019

Securities Financing Transactions Disclosures [Abstract]

Unrealized Gain (Loss) on Investments

The amortized cost, fair value, and unrealized gains and losses on investment securities at June 30, 2019 and December 31, 2018 are as follows:

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
June 30, 2019
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	$	44,699	$	23	$	196	$	44,526
Mortgage-backed U.S. government agencies		21,530		15		187		21,358
State and political subdivision obligations		14,240		19		73		14,186
Corporate debt securities		3,269		65		—		3,334
Total available-for-sale debt securities		83,738		122		456		83,404
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies		15,505		38		16		15,527
Mortgage-backed U.S. government agencies		59,377		441		206		59,612
State and political subdivision obligations		83,769		2,433		1		86,201
Corporate debt securities		1,531		1		9		1,523
Total held-to-maturity debt securities		160,182		2,913		232		162,863
Total	$	243,920	$	3,035	$	688	$	246,267

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2018
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	$	43,270	$	10	$	1,708	$	41,572
Mortgage-backed U.S. government agencies		39,865		—		1,016		38,849
State and political subdivision obligations		30,642		11		1,397		29,256
Corporate debt securities		2,250		—		4		2,246
Total available-for-sale debt securities		116,027		21		4,125		111,923
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies		16,985		14		143		16,856
Mortgage-backed U.S. government agencies		65,812		46		1,310		64,548
State and political subdivision obligations		84,034		457		842		83,649
Corporate debt securities		1,539		—		10		1,529
Total held-to-maturity debt securities		168,370		517		2,305		166,582
Total	$	284,397	$	538	$	6,430	$	278,505

Schedule of Fair Value and Unrealized Loss on 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 June 30, 2019 and December 31, 2018.

(Dollars in thousands)	Less Than 12 Months					12 Months or More					Total
	Number					Number					Number
	of	Fair		Unrealized		of	Fair		Unrealized		of	Fair		Unrealized
June 30, 2019	Securities	Value		Losses		Securities	Value		Losses		Securities	Value		Losses
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	2	$	4,473	$	19	15	$	25,443	$	177	17	$	29,916	$	196
Mortgage-backed U.S. government agencies	0		—		—	15		12,541		187	15		12,541		187
State and political subdivision obligations	0		—		—	16		8,518		73	16		8,518		73
Corporate debt securities	0		—		—	0		—		—	0		—		—
Total temporarily impaired available-for-sale debt securities	2		4,473		19	46		46,502		437	48		50,975		456
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies	0	$	—	$	—	2	$	6,002	$	16	2	$	6,002	$	16
Mortgage-backed U.S. government agencies	0		—		—	29		32,464		206	29		32,464		206
State and political subdivision obligations	0		—		—	1		503		1	1		503		1
Corporate debt securities	1		1,522		9	0		—		—	1		1,522		9
Total temporarily impaired held-to-maturity debt securities	1	$	1,522	$	9	32	$	38,969	$	223	33	$	40,491	$	232
Total	3	$	5,995	$	28	78	$	85,471	$	660	81	$	91,466	$	688

(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, 2018	Securities	Value		Losses		Securities	Value		Losses			Securities	Value		Losses
Available-for-sale securities:
U.S. Treasury and U.S. government agencies	0	$	—	$	—	21	$	38,386		$	1,708	21	$	38,386	$	1,708
Mortgage-backed U.S. government agencies	11		16,740		163	19		22,093			853	30		38,833		1,016
State and political subdivision obligations	3		1,751		23	51		24,520			1,374	54		26,271		1,397
Corporate debt securities	2		1,996		4	0		—			—	2		1,996		4
Total temporarily impaired available-for-sale securities	16	$	20,487	$	190	91	$	84,999		$	3,935	107	$	105,486	$	4,125
Held-to-maturity securities:
U.S. Treasury and U.S. government agencies	1	$	1,985	$	10	3	$	8,852		$	133	4	$	10,837	$	143
Mortgage-backed U.S. government agencies	10		16,165		79	35		42,431			1,231	45		58,596		1,310
State and political subdivision obligations	26		11,321		111	77		29,460			731	103		40,781		842
Corporate debt securities	1		1,529		10	0		—			—	1		1,529		10
Total temporarily impaired held to maturity securities	38	$	31,000	$	210	115	$	80,743		$	2,095	153	$	111,743	$	2,305
Total	54	$	51,487	$	400	206	$	165,742		$	6,030	260	$	217,229	$	6,430

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

Gross realized gains and losses on sales of available-for-sale debt securities for the three and six months ended June 30, 2019 and 2018 are shown in the table below.

(Dollars in thousands)	Three Months Ended June 30,								Six Months Ended June 30,
	2019				2018				2019				2018
Realized gains		$	43			$	11			$	69			$	111
Realized losses			(26	)			(7	)			(45	)			(9	)
Net gains		$	17			$	4			$	24		$	$	102

Investments Classified by Contractual Maturity Date

The table below illustrates the maturity distribution of investment securities at amortized cost and fair value as of June 30, 2019.

(Dollars in thousands)	Available-for-sale				Held-to-maturity
	Amortized		Fair		Amortized		Fair
June 30, 2019	Cost		Value		Cost		Value
Due in 1 year or less	$	—	$	—	$	4,983	$	4,981
Due after 1 year but within 5 years		19,562		19,445		15,989		16,153
Due after 5 years but within 10 years		39,391		39,392		79,833		82,117
Due after 10 years		3,255		3,209		—		—
		62,208		62,046		100,805		103,251
Mortgage-backed securities		21,530		21,358		59,377		59,612
	$	83,738	$	83,404	$	160,182	$	162,863