Securities (Tables)

12 Months Ended

Dec. 31, 2015

Securities

Schedule of amortized cost and estimated fair value of securities

2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	324,077	$	2,457	$	(2,304	)	$	324,230
U.S. Treasury		30,047		—		(44	)		30,003
Trust preferred securities		15,000		132		—			15,132
U.S. Government sponsored entities		9,042		13		(14	)		9,041
Corporate bonds		6,412		261		—			6,673
Total	$	384,578	$	2,863	$	(2,362	)	$	385,079
Securities held-to-maturity:
Municipals — tax exempt	$	93,518	$	1,517	$	(863	)	$	94,172
Agency mortgage-backed securities		15,793		24		(168	)		15,649
Total	$	109,311	$	1,541	$	(1,031	)	$	109,821

2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	150,570	$	3,867	$	(265	)	$	154,172
Corporate bonds		35,927		959		(23	)		36,863
Trust preferred securities		15,000		300		—			15,300
Total	$	201,497	$	5,126	$	(288	)	$	206,335
Securities held-to-maturity:
Municipals — tax exempt	$	79,882	$	1,011	$	(1,346	)	$	79,547
Agency mortgage-backed securities		15,480		44		(118	)		15,406
Total	$	95,362	$	1,055	$	(1,464	)	$	94,953

Schedule of securities with unrealized losses

	Less Than 12 Months					12 Months or More					Total
2015	Fair Value		Unrealized (Losses)			Fair Value		Unrealized (Losses)			Fair Value		Unrealized (Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	241,067	$	(2,258	)	$	2,165	$	(46	)	$	243,232	$	(2,304	)
U.S. Treasury		30,003		(44	)		—		—			30,003		(44	)
U.S. Government sponsored entities		4,980		(14	)		—		—			4,980		(14	)
Total	$	276,050	$	(2,316	)	$	2,165	$	(46	)	$	278,215	$	(2,362	)
Securities held-to-maturity:
Municipals — Tax Exempt	$	9,920	$	(78	)	$	24,412	$	(785	)	$	34,332	$	(863	)
Agency mortgage-backed securities		7,152		(89	)		4,409		(79	)		11,561		(168	)
Total	$	17,072	$	(167	)	$	28,821	$	(864	)	$	45,893	$	(1,031	)

	Less Than 12 Months					12 Months or More					Total
2014	Fair Value		Unrealized (Losses)			Fair Value		Unrealized (Losses)			Fair Value		Unrealized (Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	12,491	$	(27	)	$	35,614	$	(238	)	$	48,105	$	(265	)
Corporate bonds		—		—			5,148		(23	)		5,148		(23	)
Total	$	12,491	$	(27	)	$	40,762	$	(261	)	$	53,253	$	(288	)
Securities held-to-maturity:
Municipals — Tax Exempt	$	1,884	$	(16	)	$	42,867	$	(1,330	)	$	44,751	$	(1,346	)
Agency mortgage-backed securities		4,869		(29	)		4,974		(89	)		9,843		(118	)
Total	$	6,753	$	(45	)	$	47,841	$	(1,419	)	$	54,594	$	(1,464	)

Schedule of proceeds from sales of securities and the resulting gains and losses

	2015			2014			2013
	(Dollars in thousands)
Proceeds	$	71,832		$	108,603		$	26,944
Gross gains		751			1,008			310
Gross losses		(109	)		(911	)		(272	)

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

	Available-for-sale
	Amortized Cost		Estimated Fair Value
	(Dollars in thousands)
Due after 3 months through one year	$	1,999	$	1,996
Due after one through five years		39,454		39,659
Due after five through ten years		4,048		4,062
Due after ten years		15,000		15,132
Agency mortgage-backed securities		324,077		324,230
Total	$	384,578	$	385,079

	Held-to-maturity
	Amortized Cost		Estimated Fair Value
	(Dollars in thousands)
Due less than 3 months	$	879	$	882
Due after 3 months through one year		1,353		1,362
Due after one through five years		5,554		5,626
Due after five through ten years		13,990		14,608
Due after ten years		71,742		71,694
Agency mortgage-backed securities		15,793		15,649
Total	$	109,311	$	109,821