Securities (Tables)

9 Months Ended

Sep. 30, 2017

Securities

Schedule of amortized cost and estimated fair value of securities

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
September 30, 2017	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	374,057		1,275		(2,165)	$	373,167
Trust preferred securities		15,000		1,940		—		16,940
Total	$	389,057	$	3,215	$	(2,165)	$	390,107
Securities held-to-maturity:
Agency mortgage-backed securities	$	290,418	$	259	$	(2,341)	$	288,336
Municipals - exempt from Federal tax		89,132		1,054		(677)		89,509
Total	$	379,550	$	1,313	$	(3,018)	$	377,845

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
December 31, 2016	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	293,598	$	928	$	(3,537)	$	290,989
Trust preferred securities		15,000		600		—		15,600
Total	$	308,598	$	1,528	$	(3,537)	$	306,589
Securities held-to-maturity:
Agency mortgage-backed securities	$	233,409	$	15	$	(3,554)	$	229,870
Municipals - exempt from Federal tax		90,601		521		(2,244)		88,878
Total	$	324,010	$	536	$	(5,798)	$	318,748

Schedule of securities with unrealized losses

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
September 30, 2017	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	237,933	$	(2,049)	$	9,346	$	(116)	$	247,279	$	(2,165)
Total	$	237,933	$	(2,049)	$	9,346	$	(116)	$	247,279	$	(2,165)
Securities held-to-maturity:
Agency mortgage-backed securities	$	191,603	$	(1,980)	$	26,547	$	(361)	$	218,150	$	(2,341)
Municipals - exempt from Federal tax		15,922		(116)		20,443		(561)		36,365		(677)
Total	$	207,525	$	(2,096)	$	46,990	$	(922)	$	254,515	$	(3,018)

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
December 31, 2016	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	245,045	$	(3,537)	$	—	$	—	$	245,045	$	(3,537)
Total	$	245,045	$	(3,537)	$	—	$	—	$	245,045	$	(3,537)
Securities held-to-maturity:
Agency mortgage-backed securities	$	222,132	$	(3,528)	$	612	$	(26)	$	222,744	$	(3,554)
Municipals - exempt from Federal tax		57,304		(2,026)		2,046		(218)		59,350		(2,244)
Total	$	279,436	$	(5,554)	$	2,658	$	(244)	$	282,094	$	(5,798)

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
	(Dollars in thousands)				(Dollars in thousands)
Proceeds	$	—	$	—	$	6,536	$	49,171
Gross gains		—		—		—		544
Gross losses		—		—		(6)		(17)

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

	Available-for-sale
	Amortized		Estimated
	Cost		Fair Value
	(Dollars in thousands)
Due after ten years	$	15,000	$	16,940
Agency mortgage-backed securities		374,057		373,167
Total	$	389,057	$	390,107

	Held-to-maturity
	Amortized		Estimated
	Cost		Fair Value
	(Dollars in thousands)
Due 3 months or less	$	370	$	371
Due after 3 months through one year		505		506
Due after one through five years		3,680		3,756
Due after five through ten years		20,125		20,668
Due after ten years		64,452		64,208
Agency mortgage-backed securities		290,418		288,336
Total	$	379,550	$	377,845