Securities (Tables)

12 Months Ended

Dec. 31, 2017

Securities

Summary of available for sale securities

	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized
(Dollars in thousands)	Cost		Gains		Losses		Fair Value
U.S. government agencies and corporations	$	16,514	$	—	$	(341)	$	16,173
Mortgage-backed securities		97,677		142		(761)		97,058
Obligations of states and political subdivisions		103,977		2,022		(254)		105,745
	$	218,168	$	2,164	$	(1,356)	$	218,976

	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

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

	December 31, 2017				December 31, 2016
	Amortized				Amortized
(Dollars in thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	40,247	$	40,460	$	28,039	$	28,042
Due after one year through five years		159,444		159,571		149,487		151,102
Due after five years through ten years		15,254		15,452		22,122		22,271
Due after ten years		3,223		3,493		8,245		8,611
	$	218,168	$	218,976	$	207,893	$	210,026

Schedule of gross realized gains and losses on and the proceeds from the sale, maturities and calls of securities

	Year Ended December 31,
(Dollars in thousands)	2017		2016			2015
Realized gains (losses) from sales of securities:
Gross realized gains	$	—	$	61	$	—
Gross realized losses		—		(26)		—
Net realized gains	$	—	$	35	$	—
Proceeds from sales of securities	$	—	$	917	$	—
Realized gains from maturities and calls of securities:
Gross realized gains	$	10	$	17	$	29
Gross realized losses		—		—		—
Net realized gains	$	10	$	17	$	29
Proceeds from maturities, calls and paydowns of securities	$	41,520	$	56,438	$	36,450

Schedule of securities in an unrealized loss position

Securities in an unrealized loss position at December 31, 2017, 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	$	2,972	$	31	$	13,201	$	310	$	16,173	$	341
Mortgage-backed securities		57,116		341		22,545		420		79,661		761
Obligations of states and political subdivisions		18,644		117		9,363		137		28,007		254
Total temporarily impaired securities	$	78,732	$	489	$	45,109	$	867	$	123,841	$	1,356

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