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Investment Securities (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2017

Dec. 31, 2016

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, 2017 and December 31, 2016 are as follows:

(Dollars in thousands)		Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
June 30, 2017
Available-for-sale securities:
U.S. Treasury and U.S. government agencies		$	42,629			$	—			$	858			$	41,771
Mortgage-backed U.S. government agencies			28,543				3				307				28,239
State and political subdivision obligations			39,539				70				514				39,095
Corporate debt securities			1,100				5				—				1,105
Equity securities			1,168				15				40				1,143
Total available-for-sale securities			112,979				93				1,719				111,353
Held-to-maturity securities:
U.S. Treasury and U.S. government agencies			10,984				24				5				11,003
Mortgage-backed U.S. government agencies			51,248				72				99				51,221
State and political subdivision obligations			8,864				120				9				8,975
Corporate debt securities			—				—				—				—
Equity securities			—				—				—				—
Total held-to-maturity securities			71,096				216				113				71,199
Total		$	184,075			$	309			$	1,832			$	182,552

(Dollars in thousands)		Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
December 31, 2016
Available-for-sale securities:
U.S. Treasury and U.S. government agencies		$	48,520			$	34			$	1,542			$	47,012
Mortgage-backed U.S. government agencies			26,181				17				579				25,619
State and political subdivision obligations			61,079				91				2,332				58,838
Corporate debt securities			1,100				—				—				1,100
Equity securities			1,168				—				112				1,056
Total available-for-sale securities		$	138,048			$	142			$	4,565			$	133,625

At December 31, 2016 and 2015, amortized cost, fair value, and unrealized gains and losses on investment securities are as follows:

(Dollars in thousands)		Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
December 31, 2016
Available for sale securities:
U.S. Treasury and U.S. government agencies		$	48,520			$	34			$	1,542			$	47,012
Mortgage-backed U.S. government agencies			26,181				17				579				25,619
State and political subdivision obligations			61,079				91				2,332				58,838
Corporate debt securities			1,000				—				—				1,000
Equity securities			1,268				—				112				1,156
		$	138,048			$	142			$	4,565			$	133,625

(Dollars in thousands)		Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
December 31, 2015
Available for sale securities:
U.S. Treasury and U.S. government agencies		$	26,316			$	729			$	55			$	26,990
Mortgage-backed U.S. government agencies			38,983				49				228				38,804
State and political subdivision obligations			64,780				1,914				77				66,617
Corporate debt securities			2,000				80				10				2,070
Equity securities			1,271				2				33				1,240
		$	133,350			$	2,774			$	403			$	135,721

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, 2016 and 2015.

		Less Than 12 Months												12 Months or More												Total
(Dollars in thousands) December 31, 2016		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:
U.S. Treasury and U.S. government agencies			23			$	43,698			$	1,542				0			$	—			$	—				23			$	43,698			$	1,542
Mortgage-backed U.S. government agencies			18				24,321				579				0				—				—				18				24,321				579
State and political subdivision obligations			108				50,582				2,332				0				—				—				108				50,582				2,332
Equity securities			0				—				—				2				1,056				112				2				1,056				112
Total temporarily impaired available for sale securities			149			$	118,601			$	4,453				2			$	1,056			$	112				151			$	119,657			$	4,565

		Less Than 12 Months												12 Months or More												Total
(Dollars in thousands) December 31, 2015		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:
U.S. Treasury and U.S. government agencies			6			$	6,259			$	43				2			$	1,383			$	12				8			$	7,642			$	55
Mortgage-backed U.S. government agencies			13				12,759				124				11				6,282				104				24				19,041				228
State and political subdivision obligations			9				4,041				32				3				1,631				45				12				5,672				77
Corporate debt securities			1				990				10				0				—				—				1				990				10
Equity securities			0				—				—				2				615				33				2				615				33
Total temporarily impaired available for sale securities			29			$	24,049			$	209				18			$	9,911			$	194				47			$	33,960			$	403

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, 2017.

		Available-for-sale								Held-to-maturity
(Dollars in thousands)		Amortized Cost				Fair Value				Amortized Cost				Fair Value
June 30, 2017
Due in 1 year or less		$	1,293			$	1,292			$	—			$	—
Due after 1 year but within 5 years			20,311				20,178				14,486				14,546
Due after 5 years but within 10 years			47,618				46,801				5,362				5,432
Due after 10 years			14,046				13,700				—				—
			83,268				81,971				19,848				19,978
Mortgage-backed securities			28,543				28,239				51,248				51,221
Equity securities			1,168				1,143				—				—
		$	112,979			$	111,353			$	71,096			$	71,199

The table below is the maturity distribution of investment securities at amortized cost and fair value at December 31, 2016.

		December 31, 2016
(Dollars in thousands)		Amortized Cost				Fair Value
Due in 1 year or less		$	1,293			$	1,305
Due after 1 year but within 5 years			19,656				19,471
Due after 5 years but within 10 years			66,084				63,895
Due after 10 years			23,566				22,179
			110,599				106,850
Mortgage-backed securities			26,181				25,619
Equity securities			1,268				1,156
		$	138,048			$	133,625

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 investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2017 and December 31, 2016.

		Less Than 12 Months												12 Months or More												Total
(Dollars in thousands)		Number of Securities				Fair Value				Unrealized Losses				Number of Securities				Fair Value				Unrealized Losses				Number of Securities				Fair Value				Unrealized Losses
June 30, 2017
Available-for-sale securities:
U.S. Treasury and U.S. government agencies			21			$	39,077			$	852				1			$	2,694			$	6				22			$	41,771			$	858
Mortgage-backed U.S. government agencies			18				26,466				291				1				535				16				19				27,001				307
State and political subdivision obligations			48				24,121				381				7				3,845				133				55				27,966				514
Equity securities			0				—				—				1				550				40				1				550				40
Total temporarily impaired available- for-sale securities			87				89,664				1,524				10				7,624				195				97				97,288				1,719
Held-to-maturity securities:
U.S. Treasury and U.S. government agencies			2				4,991				5				0				—				—				2				4,991				5
Mortgage-backed U.S. government agencies			14				22,879				99				0				—				—				14				22,879				99
State and political subdivision obligations			3				1,536				9				0				—				—				3				1,536				9
Total temporarily impaired held-to-maturity securities			19				29,406				113				0				—				—				19				29,406				113
Total			106			$	119,070			$	1,637				10			$	7,624			$	195				116			$	126,694			$	1,832

		Less Than 12 Months												12 Months or More												Total
(Dollars in thousands)		Number of Securities				Fair Value				Unrealized Losses				Number of Securities				Fair Value				Unrealized Losses				Number of Securities				Fair Value				Unrealized Losses
December 31, 2016
Available-for-sale securities:
U.S. Treasury and U.S. government agencies			23			$	43,698			$	1,542				0			$	—			$	—				23			$	43,698			$	1,542
Mortgage-backed U.S. government agencies			18				24,321				579				0				—				—				18				24,321				579
State and political subdivision obligations			108				50,582				2,332				0				—				—				108				50,582				2,332
Equity securities			0				—				—				2				1,056				112				2				1,056				112
Total temporarily impaired available-for-sale securities			149			$	118,601			$	4,453				2			$	1,056			$	112				151			$	119,657			$	4,565

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
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