Securities (Tables)

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Amortized costs and fair values of held to maturity securities

Amortized costs and fair values of securities held to maturity are summarized as follows.

	September 30, 2016
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held to Maturity
Obligations of states and political subdivisions	$	6,477	$	180	$	—	$	6,657
Corporate securities	4,250		50		—		4,300
Total	$	10,727	$	230	$	—	$	10,957

	December 31, 2015
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Held to Maturity
Obligations of states and political subdivisions	$	1,457	$	—	$	(38	)	$	1,419
Corporate securities	2,750		24		(30		)	2,744
Total	$	4,207	$	24	$	(68	)	$	4,163

The amortized cost and fair value of securities held to maturity as of September 30, 2016, by contractual maturity are shown below. 

	September 30, 2016
(Dollars in thousands)	Amortized Cost		Fair Value
Held to Maturity
Due after five years through ten years	$	4,250	$	4,300
Due after ten years	6,477		6,657
Total	$	10,727	$	10,957

Amortized costs and fair values of securities available for sale

Amortized costs and fair values of securities available for sale are summarized as follows:

	September 30, 2016
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for Sale
U.S. government agencies	$	69,635	$	827	$	(163	)	$	70,299
Obligations of states and political subdivisions	66,146		2,055		(103		)	68,098
Mortgage-backed securities:
Agency	131,134		3,267		(513		)	133,888
Non-agency	11,273		43		(94		)	11,222
Other asset backed securities	53,085		652		(465		)	53,272
Corporate securities	16,652		38		(851		)	15,839
Total	$	347,925	$	6,882	$	(2,189	)	$	352,618

	December 31, 2015
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for Sale
U.S. government agencies	$	79,005	$	315	$	(380	)	$	78,940
Obligations of states and political subdivisions	74,071		1,956		(434		)	75,593
Mortgage-backed securities:
Agency	129,360		3,046		(745		)	131,661
Non-agency	12,782		33		(38		)	12,777
Other asset backed securities	58,958		426		(603		)	58,781
Corporate securities	17,557		22		(760		)	16,819
Total	$	371,733	$	5,798	$	(2,960	)	$	374,571

Amortized cost and fair value of securities available for sale by contractual maturity

The amortized cost and fair value of securities available for sale as of September 30, 2016, by contractual maturity are shown below.  Maturities may differ from contractual maturities in corporate and mortgage-backed securities because the securities and mortgages underlying the securities may be called or repaid without any penalties.  Therefore, these securities are not included in the maturity categories in the following maturity summary.

	September 30, 2016
(Dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	580	$	583
Due after one year through five years	8,964		9,266
Due after five years through ten years	24,328		24,024
Due after ten years	118,561		120,363
Mortgage-backed securities	142,407		145,110
Other asset backed securities	53,085		53,272
Total	$	347,925	$	352,618

Investments in an unrealized loss position

Investments in an unrealized loss position that are temporarily impaired are as follows:

(Dollars in thousands)	Less than Twelve Months					Twelve Months or Greater					Total
September 30, 2016	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Available for Sale
U.S. government agencies	$	18,090	$	(99	)	$	5,052	$	(64	)	$	23,142	$	(163	)
Obligations of states and political subdivisions	1,334		(15		)	7,432		(88		)	8,766		(103		)
Mortgage-backed securities:
Agency	17,246		(90		)	12,728		(423		)	29,974		(513		)
Non-agency	5,616		(84		)	1,940		(10		)	7,556		(94		)
Other asset backed securities	9,206		(178		)	20,487		(287		)	29,693		(465		)
Corporate securities	1,994		(60		)	11,266		(791		)	13,260		(851		)
Total	$	53,486	$	(526	)	$	58,905	$	(1,663	)	$	112,391	$	(2,189	)

(Dollars in thousands)	Less than Twelve Months					Twelve Months or Greater					Total
December 31, 2015	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Held to Maturity
Obligations of states and political subdivisions	$	1,419	$	(38	)	$	—	$	—		$	1,419	$	(38	)
Corporate securities	1,970		(30		)	—		—			1,970		(30		)
Total	$	3,389	$	(68	)	$	—	$	—		$	3,389	$	(68	)
Available for Sale
U.S. government agencies	$	46,000	$	(304	)	$	4,223	$	(76	)	$	50,223	$	(380	)
Obligations of states and political subdivisions	16,559		(324		)	1,082		(110		)	17,641		(434		)
Mortgage-backed securities:
Agency	27,627		(402		)	9,911		(343		)	37,538		(745		)
Non-agency	7,842		(37		)	671		(1		)	8,513		(38		)
Other asset backed securities	25,399		(276		)	12,037		(327		)	37,436		(603		)
Corporate securities	10,740		(378		)	4,866		(382		)	15,606		(760		)
Total	$	134,167	$	(1,721	)	$	32,790	$	(1,239	)	$	166,957	$	(2,960	)