Securities (Tables)

9 Months Ended

Sep. 30, 2022

Securities

Amortized cost and fair value of investments classified as available-for-sale

	September 30, 2022
	Amortized		Unrealized		Unrealized
(Dollar amounts in thousands)	Cost		Gains		Losses		Fair Value
U.S. Government agencies	$	117,925	$	26	$	(11,670)	$	106,281
Mortgage Backed Securities - residential		725,085		22		(106,138)		618,969
Mortgage Backed Securities - commercial		11,763		—		(454)		11,309
Collateralized mortgage obligations		230,237		—		(23,877)		206,360
State and municipal obligations		399,040		100		(50,325)		348,815
Municipal taxable		39,326		40		(6,760)		32,606
U.S. Treasury		2,084		—		(28)		2,056
Collateralized debt obligations		—		3,111		—		3,111
Other securities		2,478		—		—		2,478
TOTAL	$	1,527,938	$	3,299	$	(199,252)	$	1,331,985

	December 31, 2021
	Amortized		Unrealized		Unrealized
(Dollar amounts in thousands)	Cost		Gains		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

Schedule of contractual maturities of debt securities

	Available-for-Sale
	Amortized		Fair
(Dollar amounts in thousands)	Cost		Value
Due in one year or less	$	14,709	$	14,645
Due after one but within five years		45,896		44,462
Due after five but within ten years		88,156		81,746
Due after ten years		412,092		354,494
		560,853		495,347
Mortgage-backed securities and collateralized mortgage obligations		967,085		836,638
TOTAL	$	1,527,938	$	1,331,985

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

	September 30, 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	$	83,013	$	(6,952)	$	22,164	$	(4,718)	$	105,177	$	(11,670)
Mortgage Backed Securities - Residential		364,927		(48,470)		252,690		(57,668)		617,617		(106,138)
Mortgage Backed Securities - Commercial		11,309		(454)		—		—		11,309		(454)
Collateralized mortgage obligations		153,183		(14,893)		43,137		(8,984)		196,320		(23,877)
State and municipal obligations		280,127		(35,118)		38,129		(15,207)		318,256		(50,325)
Municipal taxable		25,851		(5,218)		5,715		(1,542)		31,566		(6,760)
U.S. Treasury		2,056		(28)		—		—		2,056		(28)
Total temporarily impaired securities	$	920,466	$	(111,133)	$	361,835	$	(88,119)	$	1,282,301	$	(199,252)

	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

	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollar amounts in thousands)	2022		2021		2022		2021
Beginning balance	$	—	$	2,974	$	—	$	2,974
Reductions for securities called during the period		—		—		—		—
Ending balance	$	—	$	2,974	$	—	$	2,974