Schedule of recorded amount of assets and liabilities measured at fair value on a recurring basis


			Quoted Prices
			In Active		Significant
			Markets		Other		Significant
			for Identical		Observable		Unobservable
			Assets		Inputs		Inputs
(Dollars in thousands)	Fair Value		(Level 1)		(Level 2)		(Level 3)
December 31, 2024:
Assets
Derivative financial instruments	$	161,490	$	—	$	161,490	$	—
Mortgage loans held for sale		98,115		—		98,115		—
Trading securities		102,932		—		102,932		—
Securities available for sale:
U.S. Treasuries		10,656		—		10,656		—
U.S. Government agencies		150,418		—		150,418		—
Residential mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises		1,377,525		—		1,377,525		—
Residential collateralized mortgage-obligations issued by U.S. government
agencies or sponsored enterprises		459,095		—		459,095		—
Commercial mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises		1,040,555		—		1,040,555		—
State and municipal obligations		945,723		—		945,723		—
Small Business Administration loan-backed securities		310,112		—		310,112		—
Corporate securities		26,509		—		26,509		—
Total securities available for sale		4,320,593		—		4,320,593		—
Mortgage servicing rights		89,795		—		—		89,795
SBA servicing asset		6,028		—		—		6,028
	$	4,778,953	$	—	$	4,683,130	$	95,823
Liabilities
Derivative financial instruments	$	879,855	$	—	$	879,855	$	—

December 31, 2023:
Assets
Derivative financial instruments	$	172,939	$	—	$	172,939	$	—
Mortgage loans held for sale		50,888		—		50,888		—
Trading securities		31,321		—		31,321		—
Securities available for sale:
U.S. Treasuries		73,890		—		73,890		—
U.S. Government agencies		224,706		—		224,706		—
Residential mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises		1,558,306		—		1,558,306		—
Residential collateralized mortgage-obligations issued by U.S. government
agencies or sponsored enterprises		527,422		—		527,422		—
Commercial mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises		1,024,170		—		1,024,170		—
State and municipal obligations		977,461		—		977,461		—
Small Business Administration loan-backed securities		371,686		—		371,686		—
Corporate securities		26,747		—		26,747		—
Total securities available for sale		4,784,388		—		4,784,388		—
Mortgage servicing rights		85,164		—		—		85,164
SBA servicing asset		5,952		—		—		5,952
	$	5,130,652	$	—	$	5,039,536	$	91,116
Liabilities
Derivative financial instruments	$	804,486	$	—	$	804,486	$	—

Schedule of amounts of assets and liabilities measured at fair value on a nonrecurring basis


			Quoted Prices
			In Active		Significant
			Markets		Other		Significant
			for Identical		Observable		Unobservable
			Assets		Inputs		Inputs
(Dollars in thousands)	Fair Value		(Level 1)		(Level 2)		(Level 3)
December 31, 2024:
OREO	$	2,154	$	—	$	—	$	2,154
Bank properties held for sale		3,268		—		—		3,268
Individually evaluated loans		71,112		—		—		71,112
December 31, 2023:
OREO	$	837	$	—	$	—	$	837
Bank properties held for sale		12,401		—		—		12,401
Individually evaluated loans		73,518		—		—		73,518

Schedule of estimated fair value, and related carrying amount, of the Company's financial instruments


	Carrying		Fair
(Dollars in thousands)	Amount		Value		Level 1		Level 2		Level 3
December 31, 2024
Financial assets:
Cash and cash equivalents	$	1,392,067	$	1,392,067	$	1,392,067	$	—	$	—
Trading securities		102,932		102,932		—		102,932		—
Investment securities		6,798,876		6,378,734		187,266		6,155,120		36,348
Loans held for sale		279,426		281,662		—		281,662		—
Loans, net of allowance for credit losses		33,437,647		32,448,618		—		—		32,448,618
Accrued interest receivable		163,402		163,402		—		25,035		138,367
Mortgage servicing rights		89,795		89,795		—		—		89,795
SBA servicing asset		6,028		6,028		—		—		6,028
Interest rate swap – non-designated hedge		160,407		160,407		—		160,407		—
Other derivative financial instruments (mortgage banking related)		1,083		1,083		—		1,083		—
Financial liabilities:
Deposits
Noninterest-bearing		10,192,117		10,192,117		—		10,192,117		—
Interest-bearing other than time deposits		23,703,027		23,703,027		—		23,703,027		—
Time deposits		4,165,722		4,145,687		—		4,145,687		—
Federal funds purchased and securities sold under agreements to repurchase		514,912		514,912		—		514,912		—
Corporate and subordinated debentures		391,534		377,616		—		377,616		—
Other borrowings		—		—		—		—		—
Accrued interest payable		40,739		40,739		—		40,739		—
Interest rate swap – non-designated hedge		878,046		878,046		—		878,046		—
Other derivative financial instruments (mortgage banking related)		1,809		1,809		—		1,809		—
December 31, 2023
Financial assets:
Cash and cash equivalents	$	998,877	$	998,877	$	998,877	$	—	$	—
Trading securities		31,321		31,321		—		31,321		—
Investment securities		7,463,871		7,061,167		192,043		6,869,124		—
Loans held for sale		50,888		50,888		—		50,888		—
Loans, net of allowance for credit losses		31,931,916		30,709,513		—		—		30,709,513
Accrued interest receivable		154,400		154,400		—		26,706		127,694
Mortgage servicing rights		85,164		85,164		—		—		85,164
SBA servicing asset		5,952		5,952		—		—		5,952
Interest rate swap – non-designated hedge		169,180		169,180		—		169,180		—
Other derivative financial instruments (mortgage banking related)		3,759		3,759		—		3,759		—
Financial liabilities:
Deposits
Noninterest-bearing		10,649,274		10,649,274		—		10,649,274		—
Interest-bearing other than time deposits		22,149,682		22,149,682		—		22,149,682		—
Time deposits		4,249,953		4,208,498		—		4,208,498		—
Federal funds purchased and securities sold under agreements to repurchase		489,185		489,185		—		489,185		—
Corporate and subordinated debentures		391,904		388,909		—		388,909		—
Other borrowings		100,000		100,000		—		100,000		—
Accrued interest payable		56,808		56,808		—		56,808		—
Interest rate swap – non-designated hedge		803,539		803,539		—		803,539		—
Other derivative financial instruments (mortgage banking related)		947		947		—		947		—

Schedule of reconciliation of the beginning and ending balances of Level 3 assets, comprised of Mortgage Servicing Rights, SBA servicing asset and liabilities recorded at fair value on a recurring basis


(Dollars in thousands)	MSRs
Fair value, January 1, 2024	$	85,164
Servicing assets that resulted from transfers of financial assets		9,431
Changes in fair value due to valuation inputs or assumptions		4,126
Changes in fair value due to decay		(8,926)
Fair value, December 31, 2024	$	89,795

Fair value, January 1, 2023	$	86,610
Servicing assets that resulted from transfers of financial assets		8,444
Changes in fair value due to valuation inputs or assumptions		(1,350)
Changes in fair value due to decay		(8,540)
Fair value, December 31, 2023	$	85,164

Schedule of reconciliation of the beginning and ending balances of Level 3 assets, comprised of Mortgage Servicing Rights, SBA servicing asset and liabilities recorded at fair value on a recurring basis


(Dollars in thousands)	SBA Servicing Asset
Fair value, January 1, 2024	$	5,952
Servicing assets that resulted from transfers of financial assets		2,064
Changes in fair value due to decay		(2,207)
Changes in fair value due to valuation inputs or assumptions		219
Fair value, December 31, 2024	$	6,028

Beginning Balance, June 30, 2022	$	6,068
Servicing assets that resulted from transfers of financial assets		1,621
Changes in fair value due to decay		(2,244)
Changes in fair value due to valuation inputs or assumptions		507
Fair value, December 31, 2023	$	5,952