Investment Securities (Tables)

3 Months Ended

Mar. 31, 2018

Securities Financing Transactions Disclosures [Abstract]

The amortized cost, fair value, and unrealized gains and losses on investment securities at March 31, 2018 and December 31, 2017 are as follows:

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
March 31, 2018
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	$	40,604	$	3	$	2,082	$	38,525
Mortgage-backed U.S. government agencies		45,710		6		1,077		44,639
State and political subdivision obligations		38,222		34		1,941		36,315
Corporate debt securities		2,848		15		—		2,863
Total available-for-sale debt securities		127,384		58		5,100		122,342
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies		10,984		—		174		10,810
Mortgage-backed U.S. government agencies		69,901		18		1,345		68,575
State and political subdivision obligations		50,408		36		1,477		48,967
Corporate debt securities		—		—		—		—
Total held-to-maturity debt securities		131,293		54		2,996		128,352
Total	$	258,677	$	112	$	8,096	$	250,694

(Dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2017
Available-for-sale 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 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
Corporate debt securities		—		—		—		—
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 months ended March 31, 2018 and 2017 are shown in the table below.

(Dollars in thousands)	Three Months Ended March 31,

	2018			2017
Realized gains	$	100		$	123
Realized losses		(2	)		(115	)
Net gains	$	98		$	8

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 March 31, 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
March 31, 2018	Securities	Value		Losses		Securities	Value		Losses		Securities	Value		Losses
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies	3	$	4,925	$	267	18	$	33,110	$	1,815	21	$	38,035	$	2,082
Mortgage-backed U.S. government agencies	13		20,127		258	15		19,597		819	28		39,724		1,077
State and political subdivision obligations	14		8,049		338	41		18,521		1,603	55		26,570		1,941
Total temporarily impaired available-for-sale debt securities	30		33,101		863	74		71,228		4,237	104		104,329		5,100

Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies	3		8,822		161	1		1,988		13	4		10,810		174
Mortgage-backed U.S. government agencies	37		55,999		1,299	2		2,065		46	39		58,064		1,345
State and political subdivision obligations	103		40,903		1,477	0		-		-	103		40,903		1,477
Total temporarily impaired held-to-maturity debt securities	143		105,724		2,937	3		4,053		59	146		109,777		2,996
Total	173	$	138,825	$	3,800	77	$	75,281	$	4,296	250	$	214,106	$	8,096

(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
Corporate debt securities	0		—		—	0		—			—	0		—		—
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
Corporate debt securities	0		—		—	0		—			—	0		—		—
Equity securities	0		—		—	0		—			—	0		—		—
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 March 31, 2018.

(Dollars in thousands)	Available-for-sale				Held-to-maturity
	Amortized		Fair		Amortized		Fair
March 31, 2018	Cost		Value		Cost		Value
Due in 1 year or less	$	10,428	$	10,453	$	2,001	$	1,988
Due after 1 year but within 5 years		12,758		12,414		10,025		9,859
Due after 5 years but within 10 years		48,223		45,478		46,560		45,162
Due after 10 years		10,265		9,358		2,806		2,768
		81,674		77,703		61,392		59,777

Mortgage-backed securities		45,710		44,639		69,901		68,575
	$	127,384	$	122,342	$	131,293	$	128,352