Securities (Tables)

3 Months Ended

Mar. 31, 2017

Securities

Schedule of amortized cost and estimated fair value of securities

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
March 31, 2017	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	327,726	$	987	$	(3,267)	$	325,446
Trust preferred securities		15,000		1,144		—		16,144
Total	$	342,726	$	2,131	$	(3,267)	$	341,590
Securities held-to-maturity:
Agency mortgage-backed securities	$	251,162	$	27	$	(3,302)	$	247,887
Municipals - exempt from Federal tax		90,221		639		(1,957)		88,903
Total	$	341,383	$	666	$	(5,259)	$	336,790

			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
March 31, 2017	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	277,201	$	(3,267)	$	—	$	—	$	277,201	$	(3,267)
Total	$	277,201	$	(3,267)	$	—	$	—	$	277,201	$	(3,267)
Securities held-to-maturity:
Agency mortgage-backed securities	$	236,241	$	(3,282)	$	419	$	(20)	$	236,660	$	(3,302)
Municipals - exempt from Federal tax		55,215		(1,758)		2,064		(199)		57,279		(1,957)
Total	$	291,456	$	(5,040)	$	2,483	$	(219)	$	293,939	$	(5,259)

	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
	March 31,
	2017		2016
	(Dollars in thousands)
Proceeds	$	6,536	$	5,598
Gross gains		—		180
Gross losses		(6)		—

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	$	16,144
Agency mortgage-backed securities		327,726		325,446
Total	$	342,726	$	341,590

	Held-to-maturity
	Amortized		Estimated
	Cost		Fair Value
	(Dollars in thousands)
Due after 3 months through one year		1,647		1,651
Due after one through five years		3,451		3,483
Due after five through ten years		18,077		18,439
Due after ten years		67,046		65,330
Agency mortgage-backed securities		251,162		247,887
Total	$	341,383	$	336,790