SECURITIES (Tables)

12 Months Ended

Dec. 31, 2017

Components of Securities Available for Sale

The components of securities available for sale are as follows:

	December 31, 2017
			Gross		Gross
	Amortized		unrealized		unrealized			Fair
	cost		gains		losses			value
	(Dollars in thousands)
Available for Sale
U.S. Treasury and government sponsored entities' securities	$	124,982	$	19	$	(1,184	)	$	123,817
States of the U.S. and political subdivisions		58,806		955		(138	)		59,623
Mortgage-backed GSE securities: residential		87,917		42		(838	)		87,121
Total	$	271,705	$	1,016	$	(2,160	)	$	270,561

	December 31, 2016
			Gross		Gross
	Amortized		unrealized		unrealized			Fair
	cost		gains		losses			value
	(Dollars in thousands)
Available for Sale
U.S. Treasury and government sponsored entities' securities	$	188,082	$	172	$	(2,221	)	$	186,033
States of the U.S. and political subdivisions		59,415		3		(1,661	)		57,757
Mortgage-backed GSE securities: residential		100,602		50		(1,158	)		99,494
Total	$	348,099	$	225	$	(5,040	)	$	343,284

Components of Securities Held to Maturity

The components of securities held to maturity are as follows:

	December 31, 2017
			Gross		Gross
	Amortized		unrealized		unrealized			Fair
	cost		gains		losses			value
	(Dollars in thousands)
Held to maturity
Mortgage-backed GSE securities: residential	$	73,682	$	—	$	(890	)	$	72,792
States of the U.S. and political subdivisions		9,229		112		(7	)		9,334
Total	$	82,911	$	112	$	(897	)	$	82,126

	December 31, 2016
			Gross		Gross
	Amortized		unrealized		unrealized			Fair
	cost		gains		losses			value
	(Dollars in thousands)
Held to maturity
Mortgage-backed GSE securities: residential	$	85,065	$	—	$	(1,300	)	$	83,765
States of the U.S. and political subdivisions		12,454		17		(86	)		12,385
Total	$	97,519	$	17	$	(1,386	)	$	96,150

Summary of Proceeds, Gross Realized Gains, Losses and Impairment Charges of Available for Sale Securities

Proceeds, gross realized gains, losses and impairment charges of available for sale securities were as follows:

	2017		2016		2015
	(Dollars in thousands)
Proceeds	$	62,906	$	33,701	$	16,627
Gross gains		610		604		142
Gross losses		44		—		—

Available For Sale Securities [Member]

Debt Securities by Contractual Maturity

Debt securities available for sale by contractual maturity, repricing or expected call date are shown below:

	December 31, 2017
	Amortized cost		Fair value
	(Dollars in thousands)
Due in one year or less	$	—	$	—
Due after one year through five years		26,497		26,193
Due after five years through ten years		99,042		98,193
Due after ten years		58,249		59,054
Mortgage-backed GSE securities: residential		87,917		87,121
Total	$	271,705	$	270,561

Securities Available for Sale and Held to Maturity in Unrealized Loss Position

Securities available for sale that have been in an unrealized loss position for less than twelve months or twelve months or more are as follows at December 31, 2017:

	Less than 12 months					12 months or more					Total
	Fair		Unrealized loss			Fair		Unrealized loss			Fair		Unrealized loss
	value		Loss			value		Loss			value		Loss
	(Dollars in thousands)
Description of securities:
U.S. Treasury and government sponsored entities	$	99,766	$	(734	)	$	21,222	$	(450	)	$	120,988	$	(1,184	)
States of the U.S. and political subdivisions		—					14,009		(138	)		14,009		(138	)
Mortgage-backed GSE securities: residential		28,837		(154	)		57,588		(684	)		86,425		(838	)
Total temporarily impaired securities	$	128,603	$	(888	)	$	92,819	$	(1,272	)	$	221,422	$	(2,160	)

Securities available for sale that have been in an unrealized loss position for less than twelve months or twelve months or more are as follows at December 31, 2016:

	Less than 12 months					12 months or more				Total
	Fair		Unrealized loss			Fair		Unrealized loss		Fair		Unrealized loss
	value		Loss			value		Loss		value		Loss
	(Dollars in thousands)
Description of securities:
U.S. Treasury and government sponsored entities	$	171,411	$	(2,221	)	$	—	$	—	$	171,411	$	(2,221	)
States of the U.S. and political subdivisions		53,283		(1,661	)		—		—		53,283		(1,661	)
Mortgage-backed GSE securities: residential		98,775		(1,158	)		—		—		98,775		(1,158	)
Total temporarily impaired securities	$	323,469	$	(5,040	)	$	—	$	—	$	323,469	$	(5,040	)

Held To Maturity Securities [Member]

Debt Securities by Contractual Maturity

Debt securities held to maturity by contractual maturity, repricing or expected call date are shown below:

	December 31, 2017
	Amortized cost		Fair value
	(Dollars in thousands)
Due in one year or less	$	—	$	—
Due after one year through five years		—		—
Due after five years through ten years		7,568		7,655
Due after ten years		1,661		1,679
Mortgage-backed GSE securities: residential		73,682		72,792
Total	$	82,911	$	82,126

Securities Available for Sale and Held to Maturity in Unrealized Loss Position

Securities held to maturity that have been in an unrealized loss position for less than twelve months or twelve months or more are as follows at December 31, 2017:

	Less than 12 months					12 months or more					Total
	Fair		Unrealized loss			Fair		Unrealized			Fair		Unrealized
	value		Loss			value		Loss			value		Loss
	(Dollars in thousands)
Description of securities:
Mortgage-backed GSE securities: residential	$	—	$	—		$	72,792	$	(1,925	)	$	72,792	$	(1,925	)
States of the U.S. and political subdivisions		608		(7	)		—		—			608		(7	)
Total temporarily impaired securities	$	608	$	(7	)	$	72,792	$	(1,925	)	$	73,400	$	(1,932	)

Securities held to maturity that have been in an unrealized loss position for less than twelve months or twelve months or more are as follows at December 31, 2016:

	Less than 12 months					12 months or more					Total
	Fair		Unrealized loss			Fair		Unrealized			Fair		Unrealized
	value		Loss			value		Loss			value		Loss
	(Dollars in thousands)
Description of securities:
Mortgage-backed GSE securities: residential	$	57,340	$	(1,243	)	$	26,426	$	(1,287	)	$	83,766	$	(2,530	)
States of the U.S. and political subdivisions		7,416		(86	)		—		—			7,416		(86	)
Total temporarily impaired securities	$	64,756	$	(1,329	)	$	26,426	$	(1,287	)	$	91,182	$	(2,616	)