Securities (Tables)

12 Months Ended

Dec. 31, 2019

Securities

Schedule of amortized cost and estimated fair value of securities

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
December 31, 2019	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	283,598	$	934	$	(171)	$	284,361
U.S. Treasury		118,939		1,525		—		120,464
Total	$	402,537	$	2,459	$	(171)	$	404,825
Securities held-to-maturity:
Agency mortgage-backed securities	$	285,344	$	1,206	$	(968)	$	285,582
Municipals - exempt from Federal tax		81,216		1,313		(4)		82,525
Total	$	366,560	$	2,519	$	(972)	$	368,107

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
December 31, 2018	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	311,523	$	98	$	(8,767)	$	302,854
U.S. Treasury		147,823		930		—		148,753
U.S. Government sponsored entities		7,433		4		(1)		7,436
Total	$	466,779	$	1,032	$	(8,768)	$	459,043
Securities held-to-maturity:
Agency mortgage-backed securities	$	291,241	$	59	$	(9,153)	$	282,147
Municipals - exempt from Federal tax		85,957		312		(2,241)		84,028
Total	$	377,198	$	371	$	(11,394)	$	366,175

Schedule of securities with unrealized losses

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
December 31, 2019	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	100,816	$	(105)	$	27,534	$	(66)	$	128,350	$	(171)
Total	$	100,816	$	(105)	$	27,534	$	(66)	$	128,350	$	(171)
Securities held-to-maturity:
Agency mortgage-backed securities	$	50,060	$	(178)	$	88,128	$	(790)	$	138,188	$	(968)
Municipals - exempt from Federal tax		1,556		(4)		—		—		1,556		(4)
Total	$	51,616	$	(182)	$	88,128	$	(790)	$	139,744	$	(972)

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
December 31, 2018	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	3,868	$	(21)	$	281,082	$	(8,746)	$	284,950	$	(8,767)
U.S. Government sponsored entities		3,974		(1)		—		—		3,974		(1)
Total	$	7,842	$	(22)	$	281,082	$	(8,746)	$	288,924	$	(8,768)
Securities held-to-maturity:
Agency mortgage-backed securities	$	16,088	$	(103)	$	255,917	$	(9,050)	$	272,005	$	(9,153)
Municipals - exempt from Federal tax		5,019		(27)		57,301		(2,214)		62,320		(2,241)
Total	$	21,107	$	(130)	$	313,218	$	(11,264)	$	334,325	$	(11,394)

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

	2019		2018		2017
	(Dollars in thousands)
Proceeds	$	167,551	$	94,291	$	6,536
Gross gains		1,094		1,243		—
Gross losses		(433)		(977)		(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 3 months through one year	$	54,649		55,085
Due after one through five years		64,290		65,379
Agency mortgage-backed securities		283,598		284,361
Total	$	402,537	$	404,825

	Held-to-maturity
	Amortized		Estimated
	Cost		Fair Value
	(Dollars in thousands)
Due 3 months or less	$	125		125
Due after 3 months through one year		1,449		1,457
Due after one through five years		5,206		5,358
Due after five through ten years		31,698		32,279
Due after ten years		42,738		43,306
Agency mortgage-backed securities		285,344		285,582
Total	$	366,560	$	368,107