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)
March 31, 2026:
Assets
Derivative financial instruments		$	191,332		$	—		$	191,332		$	—
Mortgage loans held for sale			48,094			—			48,094			—
Trading securities			117,590			—			117,590			—
Securities available for sale:
Residential mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises			1,849,098			—			1,849,098			—
Residential collateralized mortgage-obligations issued by U.S. government
agencies or sponsored enterprises			2,104,555			—			2,104,555			—
Commercial mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises			970,311			—			970,311			—
State and municipal obligations			1,041,195			—			1,041,195			—
Small Business Administration loan-backed securities			543,485			—			543,485			—
Corporate securities			21,704			—			21,704			—
Total securities available for sale			6,530,348			—			6,530,348			—
Mortgage servicing rights			90,018			—			—			90,018
SBA servicing asset			5,176			—			—			5,176
		$	6,982,558		$	—		$	6,887,364		$	95,194
Liabilities
Derivative financial instruments		$	562,406		$	—		$	562,406		$	—

December 31, 2025:
Assets
Derivative financial instruments		$	222,886		$	—		$	222,886		$	—
Mortgage loans held for sale			61,400			—			61,400			—
Trading securities			110,183			—			110,183			—
Securities available for sale:
Residential mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises			1,698,108			—			1,698,108			—
Residential collateralized mortgage-obligations issued by U.S. government
agencies or sponsored enterprises			2,185,584			—			2,185,584			—
Commercial mortgage-backed securities issued by U.S. government
agencies or sponsored enterprises			832,449			—			832,449			—
State and municipal obligations			1,007,412			—			1,007,412			—
Small Business Administration loan-backed securities			568,433			—			568,433			—
Corporate securities			21,770			—			21,770			—
Total securities available for sale			6,313,756			—			6,313,756			—
Mortgage servicing rights			84,032			—			—			84,032
SBA servicing asset			5,512			—			—			5,512
		$	6,797,769		$	—		$	6,708,225		$	89,544
Liabilities
Derivative financial instruments		$	554,748		$	—		$	554,748		$	—

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

(Dollars in thousands)

Fair Value

(Level 1)

(Level 2)

(Level 3)

March 31, 2026:

OREO

$

26,061

$

—

$

—

$

26,061

Individually evaluated loans

268,343

—

268,343

December 31, 2025:

OREO

$

8,771

$

—

$

—

$

8,771

Individually evaluated loans

328,452

—

328,452

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
March 31, 2026
Financial assets:
Cash and cash equivalents		$	2,867,082		$	2,867,082		$	2,867,082		$	—		$	—
Trading securities			117,590			117,590			—			117,590			—
Investment securities			8,908,521			8,585,410			272,804			8,214,486			98,120
Loans held for sale			327,935			330,177			—			330,177			—
Loans, net of allowance for credit losses			48,910,901			47,966,971			—			—			47,966,971
Accrued interest receivable			239,877			239,877			—			37,007			202,870
Mortgage servicing rights			90,018			90,018			—			—			90,018
SBA servicing asset			5,176			5,176			—			—			5,176
Interest rate swap – non-designated hedge			189,355			189,355			—			189,355			—
Other derivative financial instruments (mortgage banking related)			1,977			1,977			—			1,977			—
Financial liabilities:
Deposits
Noninterest-bearing			13,650,799			13,650,799			—			13,650,799			—
Interest-bearing other than time deposits			34,975,162			34,975,162			—			34,975,162			—
Time deposits			7,249,702			7,234,725			—			7,234,725			—
Federal funds purchased and securities sold under agreements to repurchase			643,386			643,386			—			643,386			—
Corporate and subordinated debentures			696,642			676,337			—			676,337			—
Accrued interest payable			46,748			46,748			—			46,748			—
Interest rate swap – non-designated hedge			560,264			560,264			—			560,264			—
Other derivative financial instruments (mortgage banking related)			2,142			2,142			—			2,142			—
December 31, 2025
Financial assets:
Cash and cash equivalents		$	3,172,483		$	3,172,483		$	3,172,483		$	—		$	—
Trading securities			110,183			110,183			—			110,183			—
Investment securities			8,715,214			8,400,034			274,730			8,046,606			78,698
Loans held for sale			345,343			348,381			—			348,381			—
Loans, net of allowance for credit losses			48,013,330			47,378,022			—			—			47,378,022
Accrued interest receivable			233,265			233,265			—			35,302			197,963
Mortgage servicing rights			84,032			84,032			—			—			84,032
SBA servicing asset			5,512			5,512			—			—			5,512
Interest rate swap – non-designated hedge			221,835			221,835			—			221,835			—
Other derivative financial instruments (mortgage banking related)			1,051			1,051			—			1,051			—
Financial liabilities:
Deposits
Noninterest-bearing			13,375,697			13,375,697			—			13,375,697			—
Interest-bearing other than time deposits			34,410,867			34,410,867			—			34,410,867			—
Time deposits			7,359,233			7,347,648			—			7,347,648			—
Federal funds purchased and securities sold under agreements to repurchase			618,215			618,215			—			618,215			—
Corporate and subordinated debentures			696,536			683,772			—			683,772			—
Accrued interest payable			48,972			48,972			—			48,972			—
Interest rate swap – non-designated hedge			554,433			554,433			—			554,433			—
Other derivative financial instruments (mortgage banking related)			315			315			—			315			—

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, 2026		$	84,032
Servicing assets that resulted from transfers of financial assets			1,627
Changes in fair value due to valuation inputs or assumptions			6,564
Changes in fair value due to decay			(2,205)
Fair value, March 31, 2026		$	90,018

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, 2026		$	5,512
Servicing assets that resulted from transfers of financial assets			156
Changes in fair value due to decay			(502)
Changes in fair value due to valuation inputs or assumptions			10
Fair value, March 31, 2026		$	5,176