Securities (Tables)

12 Months Ended

Dec. 31, 2016

Securities

Summary of available for sale securities

	December 31, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized
(Dollars in thousands)	Cost		Gains		Losses		Fair Value
U.S. government agencies and corporations	$	16,526	$	—	$	(414)	$	16,112
Mortgage-backed securities		77,210		228		(622)		76,816
Obligations of states and political subdivisions		114,157		3,265		(324)		117,098
	$	207,893	$	3,493	$	(1,360)	$	210,026

	December 31, 2015
			Gross		Gross
	Amortized		Unrealized		Unrealized
(Dollars in thousands)	Cost		Gains		Losses		Fair Value
U.S. government agencies and corporations	$	18,759	$	—	$	(258)	$	18,501
Mortgage-backed securities		76,957		513		(443)		77,027
Obligations of states and political subdivisions		118,389		5,640		(81)		123,948
	$	214,105	$	6,153	$	(782)	$	219,476

Schedule of amortized cost and estimated fair value of securities, by contractual maturity date

	December 31, 2016				December 31, 2015
	Amortized				Amortized
(Dollars in thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	28,039	$	28,042	$	26,624	$	26,789
Due after one year through five years		149,487		151,102		136,259		139,640
Due after five years through ten years		22,122		22,271		37,314		38,196
Due after ten years		8,245		8,611		13,908		14,851
	$	207,893	$	210,026	$	214,105	$	219,476

Schedule of securities in an unrealized loss position

Securities in an unrealized loss position at December 31, 2016, by duration of the period of the unrealized loss, are shown below.

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(Dollars in thousands)	Value		Loss		Value		Loss		Value		Loss
U.S. government agencies and corporations	$	16,111	$	414	$	—	$	—	$	16,111	$	414
Mortgage-backed securities		54,227		621		671		1		54,898		622
Obligations of states and political subdivisions		21,835		283		1,891		41		23,726		324
Total temporarily impaired securities	$	92,173	$	1,318	$	2,562	$	42	$	94,735	$	1,360

Securities in an unrealized loss position at December 31, 2015, by duration of the period of the unrealized loss, are shown below.

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(Dollars in thousands)	Value		Loss		Value		Loss		Value		Loss
U.S. government agencies and corporations	$	9,530	$	69	$	8,971	$	189	$	18,501	$	258
Mortgage-backed securities		27,085		397		2,252		46		29,337		443
Obligations of states and political subdivisions		5,157		32		4,666		49		9,823		81
Total temporarily impaired securities	$	41,772	$	498	$	15,889	$	284	$	57,661	$	782