Investment Securities (Tables)

6 Months Ended

Jun. 30, 2018

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, 2018 and December 31, 2017 are as follows:

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
June 30, 2018
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	$	40,597	$	—	$	2,257	$	38,340
Mortgage-backed U.S. government agencies		43,713		1		1,288		42,426
State and political subdivision obligations		31,551		3		1,980		29,574
Corporate debt securities		1,350		1		—		1,351
Total available-for-sale debt securities		117,211		5		5,525		111,691
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies		10,985		—		201		10,784
Mortgage-backed U.S. government agencies		66,512		4		1,649		64,867
State and political subdivision obligations		75,824		57		1,516		74,365
Total held-to-maturity debt securities		153,321		61		3,366		150,016
Total	$	270,532	$	66	$	8,891	$	261,707

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2017
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	$	40,125	$	—	$	1,395	$	38,730
Mortgage-backed U.S. government agencies		26,398		2		569		25,831
State and political subdivision obligations		27,775		7		739		27,043
Corporate debt securities		1,350		5		—		1,355
Total available-for-sale debt securities		95,648		14		2,703		92,959
Available-for-sale equity securities:
Equity securities		550		—		44		506
Total available-for-sale equity securities		550		—		44		506
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies		10,984		—		90		10,894
Mortgage-backed U.S. government agencies		53,472		—		523		52,949
State and political subdivision obligations		36,900		41		301		36,640
Total held-to-maturity debt securities		101,356		41		914		100,483
Total	$	197,554	$	55	$	3,661	$	193,948

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, 2018 and 2017 are shown in the table below.

(Dollars in thousands)	Three Months Ended June 30,								Six Months Ended June 30,
	2018				2017				2018				2017
Realized gains		$	11			$	77			$	111		$	200
Realized losses			(7	)			(65	)			(9	)		(180	)
Net gains		$	4			$	12			$	102		$	20

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, 2018 and December 31, 2017.

(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, 2018	Securities	Value		Losses		Securities	Value		Losses		Securities	Value		Losses
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	3	$	4,453	$	231	19	$	33,887	$	2,026	22	$	38,340	$	2,257
Mortgage-backed U.S. government agencies	15		23,474		407	15		18,916		881	30		42,390		1,288
State and political subdivision obligations	15		8,094		356	41		18,486		1,624	56		26,580		1,980
Total temporarily impaired available-for-sale debt securities	33		36,021		994	75		71,289		4,531	108		107,310		5,525
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies	3		8,793		191	1		1,991		10	4		10,784		201
Mortgage-backed U.S. government agencies	37		54,276		1,324	7		8,825		325	44		63,101		1,649
State and political subdivision obligations	134		53,362		1,461	3		1,486		55	137		54,848		1,516
Total temporarily impaired held-to-maturity debt securities	174		116,431		2,976	11		12,302		390	185		128,733		3,366
Total	207	$	152,452	$	3,970	86	$	83,591	$	4,921	293	$	236,043	$	8,891

(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, 2017	Securities	Value		Losses		Securities	Value		Losses			Securities	Value		Losses
Available-for-sale securities:
U.S. Treasury and U.S. government agencies	3	$	5,008	$	184	18	$	33,722		$	1,211	21	$	38,730	$	1,395
Mortgage-backed U.S. government agencies	4		5,267		75	15		20,497			494	19		25,764		569
State and political subdivision obligations	11		6,144		102	40		19,091			637	51		25,235		739
Equity securities	0		—		—	1		506			44	1		506		44
Total temporarily impaired available-for-sale securities	18	$	16,419	$	361	74	$	73,816		$	2,386	92	$	90,235	$	2,747
Held-to-maturity securities:
U.S. Treasury and U.S. government agencies	0		—		—	4		10,894			90	4		10,894		90
Mortgage-backed U.S. government agencies	0		—		—	35		52,949			523	35		52,949		523
State and political subdivision obligations	0		—		—	77		29,976			301	77		29,976		301
Total temporarily impaired held to maturity securities	0		—		—	116		93,819			914	116		93,819		914
Total	18	$	16,419	$	361	190	$	167,635		$	3,300	208	$	184,054	$	3,661

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, 2018.

(Dollars in thousands)	Available-for-sale				Held-to-maturity
	Amortized		Fair		Amortized		Fair
June 30, 2018	Cost		Value		Cost		Value
Due in 1 year or less	$	1,460	$	1,460	$	2,001	$	1,991
Due after 1 year but within 5 years		18,711		18,050		11,705		11,494
Due after 5 years but within 10 years		43,730		41,041		71,195		69,796
Due after 10 years		9,597		8,714		1,909		1,868
		73,498		69,265		86,810		85,149
Mortgage-backed securities		43,713		42,426		66,511		64,867
	$	117,211	$	111,691	$	153,321	$	150,016