Investment Securities (Tables)

3 Months Ended

Mar. 31, 2021

Investment Securities

Schedule of amortized cost of investment securities to estimated fair values

	March 31, 2021
	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U.S. Treasury and agencies	$	5,704	$	—	$	(21)	$	5,683
Obligations of state and political agencies		147,926		2,710		(1,445)		149,191
Mortgage backed securities
Residential agency		529,717		2,146		(10,268)		521,595
Commercial		85,060		2,650		(13)		87,697
Asset backed securities		91		5		—		96
Corporate bonds		30,545		707		(417)		30,835
Total available-for-sale investment securities	$	799,043	$	8,218	$	(12,164)	$	795,097

	December 31, 2020
	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U.S. Treasury and agencies	$	5,926	$	—	$	(19)	$	5,907
Obligations of state and political agencies		148,491		5,282		—		153,773
Mortgage backed securities
Residential agency		303,760		3,395		(436)		306,719
Commercial		89,300		5,678		—		94,978
Asset backed securities		109		6		—		115
Corporate bonds		30,552		388		(90)		30,850
Total available-for-sale investment securities	$	578,138	$	14,749	$	(545)	$	592,342

Schedule of investment securities with gross unrealized losses

	March 31, 2021
	Less than 12 Months				Over 12 Months				Total
	Unrealized		Fair		Unrealized		Fair		Unrealized		Fair
(dollars in thousands)	Losses		Value		Losses		Value		Losses		Value
U.S. Treasury and agencies	$	—	$	—	$	(21)	$	5,650	$	(21)	$	5,650
Obligations of state and political agencies		(1,445)		51,463		—		—		(1,445)		51,463
Mortgage backed securities
Residential agency		(10,268)		380,454		—		—		(10,268)		380,454
Commercial		(13)		9,026		—		—		(13)		9,026
Asset backed securities		—		—		—		2		—		2
Corporate bonds		(417)		13,583		—		—		(417)		13,583
Total available-for-sale investment securities	$	(12,143)	$	454,526	$	(21)	$	5,652	$	(12,164)	$	460,178

	December 31, 2020
	Less than 12 Months				Over 12 Months				Total
	Unrealized		Fair		Unrealized		Fair		Unrealized		Fair
(dollars in thousands)	Losses		Value		Losses		Value		Losses		Value
U.S. Treasury and agencies	$	(10)	$	4,509	$	(9)	$	1,309	$	(19)	$	5,818
Obligations of state and political agencies		—		—		—		—		—		—
Mortgage backed securities
Residential agency		(432)		68,494		(4)		2,356		(436)		70,850
Commercial		—		—		—		—		—		—
Asset backed securities		—		—		—		2		—		2
Corporate bonds		(90)		16,454		—		—		(90)		16,454
Total available-for-sale investment securities	$	(532)	$	89,457	$	(13)	$	3,667	$	(545)	$	93,124

Schedule of contractual maturity of amortized cost and estimated fair value

	Amortized		Fair
(dollars in thousands)	Cost		Value
Due within one year or less	$	5,480	$	5,506
Due after one year through five years		32,626		33,180
Due after five years through ten years		150,987		153,408
Due after 10 years		609,950		603,003
Total available-for-sale investment securities	$	799,043	$	795,097

Schedule of proceeds from the sale of available for sale securities

	Three months ended
	March 31,
(dollars in thousands)	2021		2020
Proceeds	$	13,189	$	4,000
Realized gains		114		—
Realized losses		—		—

Schedule of federal home loan bank

	March 31,		December 31,
(dollars in thousands)	2021		2020
Federal Reserve	$	2,675	$	2,675
FHLB		3,864		3,090