Securities (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of contractual maturities of debt securities

Contractual maturities of debt securities at March 31, 2022 were as follows.

	Available-for-Sale
	Amortized		Fair
(Dollar amounts in thousands)	Cost		Value
Due in one year or less	$	17,169	$	17,253
Due after one but within five years	47,121		46,898
Due after five but within ten years	82,626		81,719
Due after ten years	391,274		376,526
	538,190		522,396
Mortgage-backed securities and collateralized mortgage obligations	891,328		837,087
TOTAL	$	1,429,518	$	1,359,483

Schedule of gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position

The following tables show the securities’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position, at March 31, 2022 and December 31, 2021.

	March 31, 2022
	Less Than 12 Months				More Than 12 Months				Total
			Unrealized				Unrealized				Unrealized
(Dollar amounts in thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
U.S. Government agencies	$	80,851	$	(4,056)	$	4,387	$	(466)	$	85,238	$	(4,522)
Mortgage Backed Securities - Residential	420,840		(27,386)		174,550		(17,676)		595,390		(45,062)
Mortgage Backed Securities - Commercial	5,206		(54)		—		—		5,206		(54)
Collateralized mortgage obligations	158,532		(7,536)		21,506		(2,019)		180,038		(9,555)
State and municipal obligations	167,005		(16,557)		5,557		(1,047)		172,562		(17,604)
Municipal taxable	31,454		(2,439)		2,710		(338)		34,164		(2,777)
U.S. Treasury	2,076		(7)		—		—		2,076		(7)
Total temporarily impaired securities	$	865,964	$	(58,035)	$	208,710	$	(21,546)	$	1,074,674	$	(79,581)

	December 31, 2021
	Less Than 12 Months				More Than 12 Months				Total
			Unrealized				Unrealized				Unrealized
(Dollar amounts in thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
U.S. Government agencies	$	48,939	$	(739)	$	146	$	(2)	$	49,085	$	(741)
Mortgage Backed Securities - Residential	436,726		(5,281)		60,807		(1,598)		497,533		(6,879)
Collateralized mortgage obligations	73,530		(1,327)		12,505		(441)		86,035		(1,768)
State and municipal obligations	54,040		(578)		—		—		54,040		(578)
Municipal taxable	15,048		(195)		729		(20)		15,777		(215)
U.S. Treasury	204		(1)		—		—		204		(1)
Total temporarily impaired securities	$	628,487	$	(8,121)	$	74,187	$	(2,061)	$	702,674	$	(10,182)

Rollforward of the credit losses recognized in earnings

The table below presents a rollforward of the credit losses recognized in earnings for the three month periods ended March 31, 2022 and 2021:

	Three Months Ended March 31,
(Dollar amounts in thousands)	2022		2021
Beginning balance	$	2,974	$	2,974
Reductions for securities called during the period	—		—
Ending balance	$	2,974	$	2,974

Debt Securities, Available-for-sale

All securities are classified as available-for-sale.

	March 31, 2022
(Dollar amounts in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. Government agencies	$	116,581	$	343	$	(4,522)	$	112,402
Mortgage Backed Securities - residential	668,331		398		(45,062)		623,667
Mortgage Backed Securities - commercial	11,490		8		(54)		11,444
Collateralized mortgage obligations	211,507		24		(9,555)		201,976
State and municipal obligations	377,351		5,208		(17,604)		364,955
Municipal taxable	38,440		34		(2,777)		35,697
U.S. Treasury	2,083		—		(7)		2,076
Collateralized debt obligations	—		3,531		—		3,531
Other securities	3,735		—		—		3,735
TOTAL	$	1,429,518	$	9,546	$	(79,581)	$	1,359,483

	December 31, 2021
(Dollar amounts in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. Government agencies	$	118,176	$	2,688	$	(741)	$	120,123
Mortgage Backed Securities-residential	628,920		4,387		(6,879)		626,428
Mortgage Backed Securities-commercial	15,480		191		—		15,671
Collateralized mortgage obligations	175,501		1,272		(1,768)		175,005
State and municipal obligations	362,843		17,833		(578)		380,098
Municipal taxable	38,445		396		(215)		38,626
U.S. Treasury	205		—		(1)		204
Collateralized debt obligations	—		3,359		—		3,359
Other securities	5,220		—		—		5,220
TOTAL	$	1,344,790	$	30,126	$	(10,182)	$	1,364,734