10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended: June 30, 2026

or

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from             to

Commission file number: 001-31343

Associated Banc-Corp

(Exact name of registrant as specified in its charter)

Wisconsin	39-1098068
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

433 Main Street
Green Bay,	Wisconsin	54301
(Address of principal executive offices)		(Zip Code)

(920) 491-7500

(Registrant’s telephone number, including area code)

(not applicable)

(Former name, former address and former fiscal year, if changed since last report)

Securities Registered Pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol(s)	Name of each exchange on which registered
Common stock, par value $0.01 per share	ASB	New York Stock Exchange
Depositary Shrs, each representing 1/40th intrst in a shr of 5.875% Non-Cum. Perp Pref Stock, Srs E	ASB PrE	New York Stock Exchange
Depositary Shrs, each representing 1/40th intrst in a shr of 5.625% Non-Cum. Perp Pref Stock, Srs F	ASB PrF	New York Stock Exchange
6.625% Fixed-Rate Reset Subordinated Notes due 2033	ASBA	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes  ☑        No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes  ☑        No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☑	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes  ☐        No  ☑

APPLICABLE ONLY TO CORPORATE ISSUERS:

The number of shares outstanding of registrant’s common stock, par value $0.01 per share, at July 31, 2026 was 188,849,659.

1

ASSOCIATED BANC-CORP

Table of Contents

		Page
PART I. Financial Information
	Item 1. Financial Statements (Unaudited):	5
	Consolidated Balance Sheets	5
	Consolidated Statements of Income	6
	Consolidated Statements of Comprehensive Income	7
	Consolidated Statements of Changes in Stockholders’ Equity	8
	Consolidated Statements of Cash Flows	10
	Notes to Consolidated Financial Statements	12
	Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	54
	Item 3. Quantitative and Qualitative Disclosures About Market Risk	78
	Item 4. Controls and Procedures	79
PART II. Other Information
	Item 1. Legal Proceedings	80
	Item 1A. Risk Factors	80
	Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	80
	Item 5. Other Information	80
	Item 6. Exhibits	81
	Signatures	82

2

ASSOCIATED BANC-CORP

Commonly Used Terms

The following listing provides a reference of common acronyms, abbreviations, and other defined terms used throughout the document:

ACLL	Allowance for Credit Losses on Loans
AFS	Available for Sale
ALCO	Asset / Liability Committee
AOCI	Accumulated Other Comprehensive Income
American National	American National Corporation
ASC	Accounting Standards Codification
ASU	Accounting Standards Update
the Bank	Associated Bank, National Association
Basel III	International framework established by the Basel Committee on Banking Supervision for the regulation of capital and liquidity
bp	basis point(s)
BTFP	Bank Term Funding Program
CDs	Certificates of Deposit
CDIs	Core Deposit Intangibles
CECL	Current Expected Credit Losses
CET1	Common Equity Tier 1
Corporation / our	Associated Banc-Corp collectively with all of its subsidiaries and affiliates
CRA	Community Reinvestment Act
CRE	Commercial Real Estate
EAR	Earnings at Risk
ERC	Enterprise Risk Committee of the Corporation's Board of Directors
Exchange Act	Securities Exchange Act of 1934, as amended
FASB	Financial Accounting Standards Board
FDIC	Federal Deposit Insurance Corporation
Federal Reserve	Board of Governors of the Federal Reserve System
FFELP	Federal Family Education Loan Program
FHLB	Federal Home Loan Bank
FHLMC	Federal Home Loan Mortgage Corporation
FICO	Fair Isaac Corporation, provider of a broad-based risk score to aid in credit decisions
FNMA	Federal National Mortgage Association
FTEs	Full-time equivalent employees
FTP	Funds Transfer Pricing
GAAP	Generally Accepted Accounting Principles
GNMA	Government National Mortgage Association
GSE	Government-Sponsored Enterprise
HTM	Held to Maturity
LTV	Loan-to-Value
Merger Agreement	Agreement and Plan of Merger dated November 30, 2025
Moody's	Moody’s Investors Service
MSRs	Mortgage Servicing Rights
MVE	Market Value of Equity
NAV	Net Asset Value measured at fair value per share (or its equivalent) as a practical expedient
Net Free Funds	Noninterest-bearing sources of funds
NPAs	Nonperforming Assets
OCI	Other Comprehensive Income

3

OREO	Other Real Estate Owned
Parent Company	Associated Banc-Corp individually
PCD	Purchased Credit-Deteriorated
PSL	Purchased Seasoned Loans
QTD	Quarter-to-date
RAP	Retirement Account Plan - the Corporation's noncontributory defined benefit retirement plan
Repurchase Agreements	Securities sold under agreements to repurchase
Restricted Stock Awards	Restricted common stock and restricted common stock units to certain key employees
Retirement Eligible Colleagues	Colleagues whose retirement meets the early retirement or normal retirement definitions under the applicable equity compensation plan
Rev Loan(s)	Revolving loans
SBA	Small Business Administration
SEC	U.S. Securities and Exchange Commission
Series E Preferred Stock	The Corporation's 5.875% Non-Cumulative Perpetual Preferred Stock, Series E, liquidation preference $1,000 per share
Series F Preferred Stock	The Corporation's 5.625% Non-Cumulative Perpetual Preferred Stock, Series F, liquidation preference $1,000 per share
SOFR	Secured Overnight Finance Rate
YTD	Year-to-Date

4

PART I - FINANCIAL INFORMATION
ITEM 1.	Financial Statements:

ASSOCIATED BANC-CORP

Consolidated Balance Sheets

	Jun 30, 2026		Dec 31, 2025
(in thousands, except share and per share data)	(Unaudited)		(Audited)
Assets
Cash and due from banks	$	548,057	$	574,698
Interest-bearing deposits in other financial institutions	1,268,379		1,144,123
Federal funds sold and securities purchased under agreements to resell	14,355		1,400
AFS investment securities, net, at fair value	6,366,586		5,397,563
HTM investment securities, net, at amortized cost	3,510,726		3,602,519
Equity securities	29,960		26,060
Regulatory stocks, at cost	329,436		252,514
Residential loans held for sale	94,490		72,499
Commercial loans held for sale	15,000		—
Loans	36,467,040		31,163,614
Allowance for loan losses	(443,729)		(378,068)
Loans, net	36,023,311		30,785,546
Tax credit and other investments	235,536		236,657
Premises and equipment, net	449,003		381,624
Bank and corporate owned life insurance	717,116		694,452
Goodwill	1,147,081		1,104,992
Other intangible assets, net	116,953		22,849
Mortgage servicing rights, net	87,683		86,337
Interest receivable	181,916		161,118
Other assets	676,918		657,645
Total assets	$	51,812,506	$	45,202,596
Liabilities and stockholders' equity
Noninterest-bearing demand deposits	$	6,908,338	$	6,126,632
Interest-bearing deposits	33,022,917		29,425,976
Total deposits	39,931,255		35,552,608
Federal funds purchased and securities sold under agreements to repurchase	529,276		307,864
FHLB advances	4,574,681		3,268,094
Senior and subordinated debt	591,080		594,276
Allowance for unfunded commitments	50,744		41,276
Accrued expenses and other liabilities	497,347		463,131
Total liabilities	$	46,174,383	$	40,227,249
Stockholders' equity
Preferred equity	$	194,112	$	194,112
Common equity
Common stock	$	2,120	$	1,890
Surplus	2,648,846		2,050,410
Retained earnings	3,378,406		3,226,756
Accumulated other comprehensive loss	(79,593)		(7,566)
Treasury stock, at cost	(505,768)		(490,255)
Total common equity	5,444,011		4,781,235
Total stockholders' equity	5,638,123		4,975,347
Total liabilities and stockholders' equity	$	51,812,506	$	45,202,596
Preferred shares authorized (par value $1.00 per share)	750,000		750,000
Preferred shares issued and outstanding	200,000		200,000
Common shares authorized (par value $0.01 per share)	250,000,000		250,000,000
Common shares issued	211,991,791		189,016,409
Common shares outstanding	188,718,072		165,979,940

See accompanying notes to consolidated financial statements.

5

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP

Consolidated Statements of Income (Unaudited)

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands, except per share data)	2026		2025		2026		2025
Interest income
Interest and fees on loans	$	506,528	$	447,781	$	933,516	$	881,080
Interest and dividends on investment securities
Taxable	88,347		71,174		164,023		140,962
Tax-exempt	13,725		13,902		27,463		27,858
Other interest	14,694		12,679		26,335		21,921
Total interest income	623,294		545,536		1,151,337		1,071,821
Interest expense
Interest on deposits	203,765		197,656		379,038		406,796
Interest on federal funds purchased and securities sold under agreements to repurchase	4,085		2,004		7,818		5,626
Interest on FHLB advances	35,052		34,889		66,621		50,979
Interest on senior and subordinated debt	10,163		10,700		20,326		21,785
Interest on other interest-bearing liabilities	190		287		306		695
Total interest expense	253,255		245,536		474,109		485,881
Net interest income	370,039		300,000		677,228		585,940
Provision for credit losses	19,388		17,996		30,389		30,999
Net interest income after provision for credit losses	350,651		282,004		646,839		554,941
Noninterest income
Wealth management fees	26,217		23,025		51,435		45,522
Service charges and deposit account fees	15,863		13,147		29,916		25,961
Card-based fees	14,161		11,200		25,740		21,642
Other fee-based revenue	5,758		4,995		10,623		10,245
Capital markets, net	7,476		5,765		14,018		10,110
Mortgage banking, net	2,777		4,213		8,888		8,035
Loss on mortgage portfolio sale	—		—		—		(6,976)
Bank and corporate owned life insurance	4,615		4,135		8,430		9,339
Asset gains (losses), net	789		(1,735)		1,629		(2,613)
Investment securities gains, net	35		7		6		11
Other	2,707		2,226		5,571		4,477
Total noninterest income	80,398		66,977		156,256		125,754
Noninterest expense
Personnel	161,168		126,994		296,341		250,890
Technology	32,867		26,508		62,603		53,646
Occupancy	14,091		12,644		27,817		28,025
Business development and advertising	8,548		7,748		16,374		14,134
Equipment	5,423		4,494		11,033		9,021
Legal and professional	17,454		6,674		24,176		12,757
Loan and foreclosure costs	1,552		2,705		3,259		5,299
FDIC assessment	10,595		9,708		19,432		20,144
Other intangible amortization	6,894		2,203		9,096		4,405
Other	13,290		9,674		20,914		21,648
Total noninterest expense	271,882		209,352		491,045		419,971
Income before income taxes	159,167		139,629		312,050		260,724
Income tax expense	35,603		28,399		68,850		47,808
Net income	123,564		111,230		243,200		212,916
Preferred stock dividends	2,875		2,875		5,750		5,750
Net income available to common equity	$	120,689	$	108,355	$	237,450	$	207,166
Earnings per common share
Basic	$	0.64	$	0.65	$	1.34	$	1.25
Diluted	$	0.63	$	0.65	$	1.33	$	1.24
Average common shares outstanding
Basic	188,084		164,936		176,654		165,081
Diluted	189,899		166,343		178,402		166,506

Numbers may not recalculate due to rounding conventions.

See accompanying notes to consolidated financial statements.

6

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP

Consolidated Statements of Comprehensive Income (Unaudited)

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Net income	$	123,564	$	111,230	$	243,200	$	212,916
Other comprehensive (loss) income, net of tax
Investment securities
Net unrealized (losses) gains	(36,846)		21,317		(73,377)		53,149
Amortization of net unrealized losses on AFS securities transferred to HTM securities	1,901		2,059		3,590		3,986
Income tax benefit (expense)	8,717		(5,830)		17,407		(14,251)
Other comprehensive (loss) income on investment securities	(26,228)		17,545		(52,380)		42,884
Cash flow hedge derivatives
Net unrealized (losses) gains	(6,506)		1,264		(14,418)		8,532
Reclassification adjustment for net (gains) losses realized in net income	(597)		1,437		(1,343)		2,555
Income tax (expense) benefit	(1,709)		650		(3,792)		2,668
Other comprehensive (loss) income on cash flow hedge derivatives	(8,812)		3,352		(19,553)		13,755
Defined benefit pension and postretirement obligations
Amortization of prior service cost	(63)		(63)		(126)		(126)
Net actuarial gain	—		—		—		4,770
Amortization of actuarial loss	—		(4)		—		(8)
Income tax benefit (expense)	15		17		31		(1,157)
Other comprehensive (loss) income on pension and postretirement obligations	(48)		(50)		(95)		3,480
Total other comprehensive (loss) income	(35,088)		20,847		(72,027)		60,119
Comprehensive income	$	88,476	$	132,076	$	171,173	$	273,035

Numbers may not recalculate due to rounding conventions.

See accompanying notes to consolidated financial statements.

7

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP

Consolidated Statements of Changes in Stockholders’ Equity (Unaudited)

(in thousands, except per share data)	Preferred Equity		Common Stock		Surplus		Retained Earnings		Accumulated Other Comprehensive  Loss		Treasury Stock		Total
Balance, December 31, 2025	$	194,112	$	1,890	$	2,050,410	$	3,226,756	$	(7,566)	$	(490,255)	$	4,975,347
Comprehensive income:
Net income	—		—		—		119,635		—		—		119,635
Other comprehensive loss	—		—		—		—		(36,939)		—		(36,939)
Comprehensive income													82,696
Common stock issued:
Stock-based compensation plans, net	—		—		(5,126)		—		—		12,247		7,121
Purchase of treasury stock, open market purchases	—		—		—		—		—		(25,202)		(25,202)
Purchase of treasury stock, stock-based compensation plans	—		—		—		—		—		(6,377)		(6,377)
Cash dividends:
Common stock(a)	—		—		—		(40,058)		—		—		(40,058)
Preferred stock(b)	—		—		—		(2,875)		—		—		(2,875)
Stock-based compensation expense, net	—		—		7,220		—		—		—		7,220
Balance, March 31, 2026	$	194,112	$	1,890	$	2,052,504	$	3,303,458	$	(44,505)	$	(509,587)	$	4,997,872
Comprehensive income:
Net income	—		—		—		123,564		—		—		123,564
Other comprehensive loss	—		—		—		—		(35,088)		—		(35,088)
Comprehensive income													88,476
Common stock issued:
American National acquisition	—		230		593,914		—		—		—		594,144
Stock-based compensation plans, net	—		—		(1,360)		—		—		4,472		3,112
Purchase of treasury stock, stock-based compensation plans	—		—		—		—		—		(653)		(653)
Cash dividends:
Common stock(a)	—		—		—		(45,741)		—		—		(45,741)
Preferred stock(b)	—		—		—		(2,875)		—		—		(2,875)
Stock-based compensation expense, net	—		—		3,788		—		—		—		3,788
Balance, June 30, 2026	$	194,112	$	2,120	$	2,648,846	$	3,378,406	$	(79,593)	$	(505,768)	$	5,638,123

(a) Common stock dividends of $0.24 per share.

(b) Preferred stock dividends for Series E of $0.3671875 per share and for Series F of $0.3515625 per share.

8

(in thousands, except per share data)	Preferred Equity		Common Stock		Surplus		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Treasury Stock		Total
Balance, December 31, 2024	$	194,112	$	1,890	$	2,047,349	$	2,919,252	$	(74,416)	$	(482,626)	$	4,605,562
Comprehensive income:
Net income	—		—		—		101,687		—		—		101,687
Other comprehensive income	—		—		—		—		39,272		—		39,272
Comprehensive income													140,959
Common stock issued:
Public common stock offering	—		—		(52)		—		—		—		(52)
Stock-based compensation plans, net	—		—		(14,297)		—		—		16,489		2,192
Purchase of treasury stock, open market purchases	—		—		—		—		—		(22,292)		(22,292)
Purchase of treasury stock, stock-based compensation plans	—		—		—		—		—		(5,816)		(5,816)
Cash dividends:
Common stock(a)	—		—		—		(38,538)		—		—		(38,538)
Preferred stock(b)	—		—		—		(2,875)		—		—		(2,875)
Stock-based compensation expense, net	—		—		7,419		—		—		—		7,419
Balance, March 31, 2025	$	194,112	$	1,890	$	2,040,419	$	2,979,526	$	(35,144)	$	(494,246)	$	4,686,558
Comprehensive income:
Net income	—		—		—		111,230		—		—		111,230
Other comprehensive income	—		—		—		—		20,847		—		20,847
Comprehensive income													132,076
Common stock issued:
Stock-based compensation plans, net	—		—		543		—		—		(449)		94
Purchase of treasury stock, stock-based compensation plans	—		—		—		—		—		(93)		(93)
Cash dividends:
Common stock(a)	—		—		—		(38,498)		—		—		(38,498)
Preferred stock(b)	—		—		—		(2,875)		—		—		(2,875)
Stock-based compensation expense, net	—		—		3,518		—		—		—		3,518
Balance, June 30, 2025	$	194,112	$	1,890	$	2,044,481	$	3,049,383	$	(14,297)	$	(494,788)	$	4,780,781

Numbers may not recalculate due to rounding conventions.
(a) Common stock dividends of $0.23 per share.

(b) Preferred stock dividends for Series E of $0.3671875 per share and for Series F of $0.3515625 per share.

See accompanying notes to consolidated financial statements.

9

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP
Consolidated Statements of Cash Flows (Unaudited)

	Six Months Ended Jun 30,
(in thousands)	2026		2025
Cash flows from operating activities
Net income	$	243,200	$	212,916
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	30,389		30,999
Depreciation and amortization	24,824		26,006
Change in MSRs valuation	(86)		1,632
Amortization of other intangible assets	9,096		4,405
Amortization and accretion on earning assets, funding, and other, net	15,062		18,278
Net amortization of tax credit investments	17,146		17,058
Loss on sales of investment securities, net	4		—
Asset (gains) losses, net	(1,629)		2,613
Loss (gain) on mortgage banking activities, net	911		(683)
Loss on mortgage portfolio sale	—		6,976
Net periodic pension benefit	(12,308)		(12,372)
Mortgage loans originated for sale	(367,223)		(273,947)
Proceeds from sales of mortgage loans held for sale	352,641		238,557
Changes in certain assets and liabilities:
Increase in interest receivable	(898)		(854)
Increase in BOLI/COLI cash surrender value	(8,430)		(9,339)
Decrease in net income tax position	34,744		49,335
Increase (decrease) in interest payable	1,610		(3,681)
Decrease in expense payable	(53,437)		(11,116)
Decrease (increase) in net derivative position	16,624		(50,962)
Net change in other assets and other liabilities	40,720		(6,184)
Net cash provided by operating activities	342,960		239,637
Cash flows from investing activities
Net increase in loans	(1,593,324)		(865,086)
Purchases of:
AFS securities	(1,815,271)		(910,262)
HTM securities	—		(994)
Regulatory stocks and equity securities	(130,630)		(177,712)
Proceeds from:
Sales of AFS securities	995,830		—
Sales of HTM securities	1,221		—
Sales of regulatory stocks and equity securities	53,765		76,535
Prepayments, calls, and maturities of AFS securities	772,971		504,380
Prepayments, calls, and maturities of HTM securities	92,018		69,279
Sales, prepayments, calls, and maturities of other assets	9,756		7,813
Sale of mortgage portfolio	—		564,375
Premises, equipment, and software	(21,046)		(18,046)
Net change in tax credit and alternative investments	(12,499)		(14,903)
Net cash received from the American National acquisition	220,898		—
Net cash used in investing activities	(1,426,311)		(764,621)
Cash flows from financing activities
Net decrease in deposits	(166,364)		(500,869)
Net increase (decrease) in short-term funding	207,090		(394,784)
Net increase in short-term FHLB advances	1,417,750		2,220,000
Repayment of long-term FHLB advances	(151,007)		(400,065)
Proceeds from long-term FHLB advances	—		200,000
Repayment of finance lease principal	—		(45)
Repayment of long-term funding	—		(250,000)
Proceeds from issuance of common stock for stock-based compensation plans	10,233		2,286
Purchase of treasury stock, open market purchases	(25,202)		(22,292)
Purchase of treasury stock, stock-based compensation plans	(7,030)		(5,910)
Cash dividends on common stock	(85,799)		(77,036)
Cash dividends on preferred stock	(5,750)		(5,750)
Payments for other financing activities	—		(52)
Net cash provided by financing activities	1,193,921		765,485
Net increase in cash and cash equivalents	110,570		240,501
Cash and cash equivalents at beginning of period	1,720,221		1,019,604
Cash and cash equivalents at end of period	$	1,830,791	$	1,260,105

Numbers may not recalculate due to rounding conventions.

10

ASSOCIATED BANC-CORP

Consolidated Statements of Cash Flows

	Six Months Ended Jun 30,
(in thousands)	2026		2025
Supplemental disclosures of cash flow information
Cash paid for interest	$	469,929	$	488,277
Issuance of common stock as consideration for the American National acquisition	594,144		—
Assets acquired from the American National acquisition	5,228,544		—
Liabilities assumed from the American National acquisition	4,634,400		—

See accompanying notes to consolidated financial statements.

11

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP

Notes to Consolidated Financial Statements

These interim consolidated financial statements have been prepared according to the rules and regulations of the SEC and, therefore, certain information and footnote disclosures normally presented in accordance with GAAP have been omitted or abbreviated. The information contained on the consolidated financial statements and footnotes in Associated Banc-Corp's 2025 Annual Report on Form 10-K should be referred to in connection with the reading of these unaudited interim consolidated financial statements.

Note 1 Basis of Presentation

In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the financial position, results of operations and comprehensive income, changes in stockholders’ equity, and cash flows of the Corporation for the periods presented, and all such adjustments are of a normal recurring nature. The consolidated financial statements include the accounts of all subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year.

In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. The determination of the ACLL is particularly susceptible to significant change. Management has evaluated subsequent events for potential recognition or disclosure.

Within the tables presented, certain columns and rows may not recalculate due to the use of rounded numbers for disclosure purposes.

Note 2 Summary of Significant Accounting Policies

The accounting and reporting policies of the Corporation conform to U.S. GAAP and to general practice within the financial services industry. A discussion of these policies can be found in Note 1 Summary of Significant Accounting Policies included in the Corporation’s 2025 Annual Report on Form 10-K, except for new accounting pronouncements adopted, as discussed below.

New Accounting Pronouncements Adopted

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2025-08 Financial Instruments-Credit Losses (Topic 326)	The amendments in this update expand the gross-up approach for initial recognition and measurement of acquired financial assets to purchased seasoned loans.	Early adopted effective April 1, 2026 on a prospective basis, as permitted by the standard	The Corporation early adopted this standard and applied it in the purchase accounting for the acquisition of American National. The ASU expands the gross-up approach to certain acquired non-PCD loans that qualify as purchased seasoned loans, including loans acquired in a business combination, resulting in the acquisition-date allowance for credit losses being added to the loans’ initial amortized cost basis rather than recognized as a Day 1 provision for credit losses. Refer to Note 3 for additional information.

12

Future Accounting Pronouncements

The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review.

Standard	Description	Date of Anticipated Adoption	Effect on Financial Statements
ASU 2024-03 Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40)	The amendments in this update require a public business entity to disclose specific information about certain costs and expenses in the notes to its financial statements for interim and annual reporting periods. The objective of the disclosure requirements is to provide disaggregated information about a public business entity's expenses to help investors (a) better understand the entity's performance, (b) better assess the entity's prospects for future cash flows, and (c) compare an entity's performance over time and with that of other entities.	Annual period ending December 31, 2027 and subsequent interim periods	The Corporation is currently evaluating the impact on its disclosures.
ASU 2025-06 Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)	The amendments in this update simplify the capitalization guidance by removing all references to prescriptive and sequential software development stages to align with the shift to incremental and iterative software development methods.	Interim period ending March 31, 2028 and subsequent periods	The Corporation is currently evaluating the impact on its disclosures.

Note 3 Business Combinations

On April 1, 2026, the Corporation completed its previously announced acquisition of American National pursuant to the terms of the Merger Agreement by and between the Corporation and American National.

Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) immediately following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.

At the effective time of the merger, 100% of the outstanding shares of voting common stock and non-voting common stock of American National outstanding immediately prior to the effective time of the merger, other than certain shares held by the Corporation or American National, were converted into the right to receive an aggregate 22,975,382 shares of common stock of the Corporation. This represented 36.250 shares of the Corporation's common stock for each share of outstanding common stock of American National, with cash paid in lieu of fractional shares. Total consideration for the acquisition was $594.1 million valued at the acquisition date fair value of $25.86 per share.

American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets. As a result of the acquisition, the Corporation increased its deposit market share and will deliver its products and services to an expanded client base across attractive Midwest markets.

The acquisition of American National has been accounted for as a business combination using the acquisition method of accounting in accordance with FASB ASC Topic 805, Business Combinations. Accordingly, assets acquired and liabilities assumed were recorded at fair value as of the acquisition date. Fair value estimates related to the assets and liabilities from American National are subject to adjustment for up to one year after the closing date of the acquisition as additional information becomes available. The purchase consideration allocation is considered preliminary as certain estimates related to the assets acquired and liabilities assumed are subject to continuing refinement. Valuations subject to refinement include, but are not limited to, loans, certain deposits, certain other assets, and the core deposit intangible asset.

13

The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the effective date of the American National acquisition.

(in thousands)	April 1, 2026
Total Consideration	$	594,144
Assets
Cash and cash equivalents	$	220,898
Investment securities	989,925
Loans, net	3,716,472
Other intangible assets(a)	103,200
Other assets	155,960
Total assets	$	5,186,455
Liabilities
Deposits	$	4,544,700
Other liabilities	89,700
Total liabilities	$	4,634,400
Fair value of net assets acquired	$	552,055
Goodwill	$	42,089
(a) Core deposit intangibles

The goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Corporation with the former operations of American National. None of the goodwill is deductible for income tax purposes as the acquisition was accounted for as a tax-free exchange.

The Corporation engaged an independent, third-party valuation specialist to assist in the valuation of certain assets acquired and liabilities assumed from the business combination. The following valuation techniques were used in the valuation:

Investment securities: The fair value of AFS investment securities and equity securities was determined utilizing quoted prices in an active market, if available, or an external third party broker opinion of the market value.

Loans, net: Fair values of loans were based on a discounted cash flow methodology that considered factors including the type of loan, related collateral, credit quality status, fixed or variable interest rate, term of loan, amortization status and current discount rates. For the non-credit (interest and liquidity) premium, loans were grouped together according to similar characteristics when applying various valuation techniques. For the credit discount, loans were also grouped based on whether they had more than insignificant deterioration in credit since origination. Purchased loans and leases that reflect a more-than-insignificant deterioration of credit from origination are considered purchase credit deteriorated (PCD) assets. All other loans acquired were deemed purchased seasoned loans (non-PCD). The initial estimate of expected credit losses, excluding credit card loans, was recognized in the ACLL on the date of acquisition using the same methodology as other loans and leases held-for-investment.

The following table includes the fair value and unpaid principal balance of the acquired loans and leases:

(in thousands)	Unpaid principal balance		Premium (Discount)		Loans and leases		Allowance for credit losses on loans		Loans and leases, net
Non-PCD loans	$	3,185,647	$	2,692	$	3,188,339	$	(28,263)	$	3,160,076
PCD Loans	615,403		(19,495)		595,908		(39,512)		556,396
Total	$	3,801,050	$	(16,803)	$	3,784,247	$	(67,775)	$	3,716,472

Core Deposit Intangibles: This intangible asset represents the value of the relationships with deposit customers. The fair value was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative cost of funds, and the interest costs associated with customer deposits. The CDIs will be amortized utilizing the sum of years digits basis.

14

Time Deposits: The fair value for time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered to the contractual interest rates on such time deposits.

The Corporation's operating results include operating results from American National for the three months ended June 30, 2026. Due to the integration of operating activities into those of the Corporation, bifurcation and reporting of revenues and net income from the former American National operations is impracticable. In addition, such amounts would require significant estimates related to the proper allocation of merger cost savings that cannot be objectively made. The following table presents merger related costs, and the line item that these costs are included in on the consolidated statement of income, for the three and six months ended June 30, 2026. Additional transaction and integration costs will be expensed in future periods as incurred.

(in thousands)	Three Months Ended June 30, 2026		Six Months Ended Jun 30, 2026
Personnel	$	13,364	$	13,364
Technology	781		781
Occupancy	23		103
Business development and advertising	417		654
Equipment	98		98
Legal and professional	9,569		10,253
Other	217		223
Total	$	24,469	$	25,476

Pro Forma Financial Information

The following unaudited pro forma summary presents consolidated information of the Corporation as if the American National acquisition had occurred on January 1, 2025. The amounts do not reflect anticipated operating cost savings, revenue enhancements, or other synergies expected to result from the acquisition. Actual results may differ from the unaudited pro forma information presented.

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(Unaudited) (in thousands)	2026		2025		2026		2025
Net interest income and noninterest income	$	447,151	$	415,810	$	881,852	$	807,328
Net income	141,691		120,532		263,217		212,961

The pro forma adjustments include the effect of excluding acquisition-related expenses of $25.5 million for the six months ended June 30, 2026 and included such expenses in the first half of 2025. These adjustments also include adjusting amortization and accretion of fair value marks on acquired loans, investments, deposits, intangibles, other assets/liabilities, and the effect of income taxes.

Note 4 Earnings Per Common Share

Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards). Presented below are the calculations for basic and diluted earnings per common share:

15

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands, except per share data)	2026		2025		2026		2025
Net income	$	123,564	$	111,230	$	243,200	$	212,916
Preferred stock dividends	(2,875)		(2,875)		(5,750)		(5,750)
Net income available to common equity	120,689		108,355		237,450		207,166
Common shareholder dividends	(45,634)		(38,304)		(85,577)		(76,636)
Unvested share-based payment awards	(107)		(194)		(223)		(399)
Undistributed earnings	$	74,948	$	69,857	$	151,650	$	130,131
Undistributed earnings allocated to common shareholders	$	74,769	$	69,501	$	151,203	$	129,500
Undistributed earnings allocated to unvested share-based payment awards	179		356		447		630
Undistributed earnings	$	74,948	$	69,857	$	151,650	$	130,131
Basic
Distributed earnings to common shareholders	$	45,634	$	38,304	$	85,577	$	76,636
Undistributed earnings allocated to common shareholders	74,769		69,501		151,203		129,500
Total common shareholders earnings, basic	$	120,403	$	107,805	$	236,780	$	206,137
Diluted
Distributed earnings to common shareholders	$	45,634	$	38,304	$	85,577	$	76,636
Undistributed earnings allocated to common shareholders	74,769		69,501		151,203		129,500
Total common shareholders earnings, diluted	$	120,403	$	107,805	$	236,780	$	206,137
Weighted average common shares outstanding	188,084		164,936		176,654		165,081
Effect of dilutive common stock awards	1,815		1,407		1,748		1,425
Diluted weighted average common shares outstanding	189,899		166,343		178,402		166,506
Basic earnings per common share	$	0.64	$	0.65	$	1.34	$	1.25
Diluted earnings per common share	$	0.63	$	0.65	$	1.33	$	1.24

Excluded from the earnings per common share calculations were nominal amounts and 1.4 million anti-dilutive common stock options for the three months ended June 30, 2026 and 2025, respectively, and nominal amounts and 1.2 million anti-dilutive common stock options for the six months ended June 30, 2026 and 2025, respectively.

Note 5 Stock-Based Compensation

The fair values of stock options and restricted stock are amortized as compensation expense on a straight-line basis over the vesting period of the grants. For colleagues who meet the definition of retirement eligible under the 2020 Incentive Compensation Plan and 2025 Equity Incentive Plan (collectively, the Incentive Plans), expenses related to stock options and restricted stock grants are fully recognized on the date the colleague meets the definition of normal or early retirement. Compensation expense recognized is included in personnel expense on the consolidated statements of income.

A summary of the Corporation’s stock option activity for the six months ended June 30, 2026 is presented below:

Stock Options	Shares(a)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value(a)
Outstanding at December 31, 2025	1,460	$	22.71	2.52 years	$	4,483
Exercised	444	23.78
Outstanding at June 30, 2026	1,016	$	22.24	2.43 years	$	8,658
Options Exercisable at June 30, 2026	1,016	$	22.24	2.43 years	$	8,658

(a) In thousands

Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock option. For the six months ended June 30, 2026, the intrinsic value of stock options exercised was $2.3 million, compared to $0.4 million for the six months ended June 30, 2025. All stock options were vested as of December 31, 2025.

16

The Corporation has issued service-based and performance-based restricted stock grants, in the form of awards and units, under the Incentive Plans. Service-based awards are contingent upon continued employment or meeting the requirements for retirement. Performance-based awards are based on performance goals determined by the Compensation and Benefits Committee of the Corporation's Board of Directors, with vesting ranging from a minimum of 0% to a maximum of 150% of the target award. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date.

The following table summarizes information about the Corporation’s restricted stock activity for the six months ended June 30, 2026:

Restricted Stock	Shares(a)	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2025	2,372	$	22.02
Granted	897	26.49
Vested	849	22.01
Forfeited	47	24.42
Outstanding at June 30, 2026	2,373	$	23.66

(a) In thousands

The Corporation amortizes the expense related to restricted stock awards as compensation expense over the vesting period specified in the grant's award agreement. Performance-based restricted stock granted during 2025 and 2026 will cliff-vest after the three year performance period has ended. Service-based restricted stock granted during 2025 and 2026 will generally vest ratably over a period of four years. Expense for restricted stock of $11.2 million and $11.3 million was recorded for the six months ended June 30, 2026 and June 30, 2025, respectively. Included in compensation expense for the accelerated vesting of restricted stock granted to retirement eligible colleagues was $4.2 million and $4.4 million of expense in the first six months of 2026 and 2025, respectively. The Corporation had $28.1 million of unrecognized compensation costs related to restricted stock at June 30, 2026 that are expected to be recognized over the remaining requisite service periods that extend through the first quarter of 2030.

The Corporation has the ability to issue shares from treasury or new shares upon the exercise of stock options or the granting of restricted stock. The Board of Directors has authorized management to repurchase shares of the Corporation’s common stock, to be made available for issuance in connection with the Corporation’s employee incentive plans and for other corporate purposes. The repurchase of shares, if any, will be based on market and investment opportunities, capital levels, growth prospects, and regulatory constraints. Such repurchases may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchase programs, or similar facilities.

17

Note 6 Investment Securities

Investment securities are designated as AFS, HTM, or equity on the consolidated balance sheets. The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	7,342	$	4	$	(106)	$	7,240
Residential mortgage-related securities:
FNMA/FHLMC	142,709		815		(6,236)		137,288
GNMA	5,518,890		2,481		(29,723)		5,491,648
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		—		(4,659)		410,221
GNMA	111,910		—		(5,066)		106,844
Asset backed securities:
FFELP	89,197		1		(986)		88,212
SBA	120,221		387		(538)		120,070
Other debt securities(a)	6,750		—		(1,687)		5,063
Total AFS investment securities	$	6,411,899	$	3,688	$	(49,001)	$	6,366,586
HTM investment securities
U.S. Treasury securities	$	997	$	5	$	—	$	1,002
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,797		(124,874)		1,468,604
Residential mortgage-related securities:
FNMA/FHLMC	790,729		39		(130,031)		660,737
GNMA	37,215		18		(2,607)		34,626
Private-label	292,007		—		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	757,723		—		(113,423)		644,300
GNMA	40,423		—		(4,334)		36,089
Total HTM investment securities	$	3,510,775	$	1,859	$	(420,816)	$	3,091,818

(a)Unrealized losses includes allowance for credit losses

18

The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	3,063	$	1	$	(20)	$	3,044
Residential mortgage-related securities:
FNMA/FHLMC	134,142		1,214		(5,493)		129,863
GNMA	5,000,015		40,067		(253)		5,039,829
Commercial mortgage-related securities:
FNMA/FHLMC	17,959		—		(1,001)		16,958
GNMA	113,374		—		(3,818)		109,556
Asset backed securities:
FFELP	95,977		19		(950)		95,046
SBA	283		—		(14)		269
Other debt securities	3,000		—		(2)		2,998
Total AFS investment securities	$	5,367,813	$	41,301	$	(11,551)	$	5,397,563
HTM investment securities
U.S. Treasury securities	$	996	$	19	$	—	$	1,015
Obligations of state and political subdivisions (municipal securities)	1,628,088		3,070		(123,856)		1,507,302
Residential mortgage-related securities:
FNMA/FHLMC	823,630		165		(127,333)		696,462
GNMA	39,123		82		(2,321)		36,884
Private-label	302,817		—		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	763,370		—		(113,004)		650,366
GNMA	44,552		152		(4,566)		40,138
Total HTM investment securities	$	3,602,576	$	3,488	$	(415,070)	$	3,190,994

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The expected maturities of AFS and HTM securities at June 30, 2026, are shown below:

	AFS					HTM
(in thousands)	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Due in one year or less	$	3,750	$	2,063		$	820,235	$	818,331
Due after one year through five years	7,739		7,655			825		779
Due after five years through ten years	—		—			8,078		7,932
Due after ten years	2,603		2,585			763,540		642,564
Total municipal, U.S. Treasury and other debt securities	14,092		12,303			1,592,678		1,469,606
Residential mortgage-related securities:
FNMA/FHLMC	142,709		137,288			790,729		660,737
GNMA	5,518,890		5,491,648			37,215		34,626
Private-label	—		—			292,007		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		410,221			757,723		644,300
GNMA	111,910		106,844			40,423		36,089
Asset backed securities:
FFELP	89,197		88,212			—		—
SBA	120,221		120,070			—		—
Total investment securities	$	6,411,899	$	6,366,586		$	3,510,775	$	3,091,818
Ratio of fair value to amortized cost			99.3		%			88.1		%

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The following table summarizes gross realized gains and losses on AFS securities, the gain or loss on sale and fair value adjustment of equity securities, and proceeds from the sale of AFS investment securities:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Gross losses on HTM securities	$	—	$	—	$	(4)	$	—
Fair value adjustment of equity securities	35		7		10		11
Investment securities (losses) gains, net	$	35	$	7	$	6	$	11

Investment securities with a carrying value of $1.0 billion at June 30, 2026 and $1.2 billion December 31, 2025, respectively, were pledged as required to secure certain deposits or for other purposes.

Accrued interest receivable on HTM securities totaled $17.2 million and $17.7 million at June 30, 2026 and December 31, 2025, respectively. Accrued interest receivable on AFS securities totaled $25.1 million and $23.0 million at June 30, 2026 and December 31, 2025, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets.

The Corporation holds U.S. Treasury, municipal, and mortgage-related securities issued by the U.S. government or a GSE which are backed by the full faith and credit of the U.S. government and private-label residential mortgage-related securities that have credit enhancement which covers the first 16% of losses and, as a result, no allowance for credit losses has been recorded related to these securities.

There was a nominal allowance for credit losses on HTM securities at June 30, 2026 and $0.1 million at December 31, 2025, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The allowance for credit losses on AFS securities was $1.7 million at June 30, 2026 and zero at December 31, 2025, attributable to a corporate bond acquired through the recent acquisition of American National, included in other debt securities and AFS investment securities, net, at fair value on the consolidated balance sheets.

The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2026:

	Less than 12 months					12 months or more					Total
(in thousands)	Number of Securities	Unrealized Losses		Fair Value		Number of Securities	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	4	$	(99)	$	4,176	1	$	(7)	$	243	$	(106)	$	4,419
Residential mortgage-related securities:
FNMA/FHLMC	34	(604)		47,975		5	(5,632)		44,189		(6,236)		92,164
GNMA	236	(29,685)		4,396,013		2	(38)		1,901		(29,723)		4,397,914
Commercial mortgage-related securities:
FNMA/FHLMC	11	(3,780)		393,331		1	(879)		16,889		(4,659)		410,220
GNMA	—	—		—		15	(5,066)		106,844		(5,066)		106,844
Asset backed securities:
FFELP	2	(75)		30,893		12	(911)		51,501		(986)		82,394
SBA	6	(526)		89,501		2	(12)		183		(538)		89,684
Other debt securities(a)	3	(1,687)		4,062		—	—		—		(1,687)		4,062
Total	296	$	(36,456)	$	4,965,951	38	$	(12,545)	$	221,750	$	(49,001)	$	5,187,701
HTM investment securities
Obligations of state and political subdivisions (municipal securities)	327	$	(6,876)	$	500,662	407	$	(117,998)	$	615,514	$	(124,874)	$	1,116,176
Residential mortgage-related securities:
FNMA/FHLMC	15	(127)		15,968		100	(129,904)		637,637		(130,031)		653,605
GNMA	4	(60)		5,330		79	(2,547)		26,571		(2,607)		31,901
Private-label	—	—		—		18	(45,547)		246,460		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	2	(536)		26,155		43	(112,887)		618,145		(113,423)		644,300
GNMA	—	—		—		13	(4,334)		36,088		(4,334)		36,088
Total	348	$	(7,599)	$	548,115	660	$	(413,217)	$	2,180,415	$	(420,816)	$	2,728,530

(a)Unrealized losses includes allowance for credit losses

20

For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2025:

	Less than 12 months					12 months or more					Total
(in thousands)	Number of Securities	Unrealized Losses		Fair Value		Number of Securities	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	—	$	—	$	—	2	$	(20)	$	863	$	(20)	$	863
Residential mortgage-related securities:
FNMA/FHLMC	12	(95)		14,155		12	(5,398)		56,215		(5,493)		70,370
GNMA	16	(232)		143,734		3	(21)		2,674		(253)		146,408
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,001)		16,958		(1,001)		16,958
GNMA	—	—		—		15	(3,818)		109,556		(3,818)		109,556
Asset backed securities:
FFELP	2	(152)		33,239		12	(798)		55,565		(950)		88,804
SBA	—	—		—		2	(14)		231		(14)		231
Other debt securities	2	(2)		1,998		—	—		—		(2)		1,998
Total	32	$	(481)	$	193,126	47	$	(11,070)	$	242,062	$	(11,551)	$	435,188
HTM investment securities
Obligations of state and political subdivisions (municipal securities)	81	$	(2,978)	$	89,826	543	$	(120,878)	$	842,485	$	(123,856)	$	932,311
Residential mortgage-related securities:
FNMA/FHLMC	1	—		30		102	(127,333)		676,915		(127,333)		676,945
GNMA	—	—		—		80	(2,321)		30,237		(2,321)		30,237
Private-label	—	—		—		18	(43,990)		258,827		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	2	(470)		26,287		43	(112,534)		624,079		(113,004)		650,366
GNMA	—	—		—		13	(4,566)		40,138		(4,566)		40,138
Total	84	$	(3,448)	$	116,143	799	$	(411,622)	$	2,472,681	$	(415,070)	$	2,588,824

On a quarterly basis, the Corporation refreshes the credit quality of each HTM security. The Company monitors the credit quality of HTM securities through credit ratings provided by S&P and Moody’s. Investment grade securities are rated BBB- or higher by S&P, or Baa3 or higher by Moody’s, and are generally considered by the rating agencies and market participants to be of low credit risk. As of June 30, 2026 and December 31, 2025, the Corporation's HTM portfolio contained all investment grade securities except for securities that were not rated which were individually reviewed noting no credit quality issues.

Based on the Corporation’s evaluation, management does not believe any unrealized losses at June 30, 2026 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions, except as disclosed above. As of June 30, 2026, the Corporation does not intend to sell, nor does it believe that it will be required to sell, the securities in an unrealized loss position before recovery of their amortized cost basis.

Regulatory stocks: The Corporation had FHLB stock of $215.0 million and $154.4 million at June 30, 2026 and December 31, 2025, respectively. The Corporation had Federal Reserve Bank stock of $114.4 million and $98.1 million at June 30, 2026 and December 31, 2025, respectively.

Accrued interest receivable on FHLB stock totaled $4.1 million at June 30, 2026 and $2.8 million at December 31, 2025. There was no accrued interest receivable on Federal Reserve Bank Stock at both June 30, 2026 and December 31, 2025. Accrued interest receivable on both FHLB stock and Federal Reserve Bank stock is included in interest receivable on the consolidated balance sheets.

21

Equity Securities

Equity securities with readily determinable fair values: The Corporation's portfolio of equity securities with readily determinable fair values is primarily comprised of mutual funds. The Corporation had equity securities with readily determinable fair values of $15.0 million and $11.1 million at June 30, 2026 and December 31, 2025, respectively.

Equity securities without readily determinable fair values: The Corporation's portfolio of equity securities without readily determinable fair values primarily consists of an investment in a private loan fund. The Corporation had equity securities without readily determinable fair values carried at $15.0 million at both June 30, 2026 and December 31, 2025.

Note 7 Loans

The period end loan composition was as follows:

(in thousands)	Jun 30, 2026		Dec 31, 2025
Commercial and industrial	$	13,750,175	$	11,799,757
Commercial real estate — owner occupied	1,575,445		1,186,324
Commercial and business lending	15,325,620		12,986,081
Commercial real estate — investor	6,492,950		5,246,030
Real estate construction	2,546,186		1,994,642
Commercial real estate lending	9,039,136		7,240,672
Total commercial	24,364,756		20,226,753
Residential mortgage	6,808,398		6,793,957
Auto finance	4,044,416		3,106,498
Home equity	826,343		713,271
Other consumer	423,127		323,135
Total consumer	12,102,284		10,936,861
Total loans	$	36,467,040	$	31,163,614

Accrued interest receivable on loans totaled $135.4 million at June 30, 2026 and $117.6 million at December 31, 2025, and is included in interest receivable on the consolidated balance sheets. The amount of accrued interest reversed was $0.4 million for the three months ended June 30, 2026 and $0.8 million for the six months ended June 30, 2026, compared to $0.5 million for the three months ended June 30, 2025 and $1.1 million for the six months ended June 30, 2025.

22

The following table presents loans by credit quality indicator by origination year at June 30, 2026:

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2026		2025		2024		2023		2022		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	3,199	$	2,741,443	$	2,328,388	$	3,787,950	$	1,722,490	$	982,648	$	840,913	$	738,339	$	13,142,171
Special mention	—		22,708		626		26,761		24,508		9,346		5,458		72,581		161,988
Substandard	668		94,753		38,835		33,522		32,732		12,846		130,614		58,326		401,628
Nonaccrual	20		635		2,160		27,179		4,617		4,506		474		4,817		44,388
Commercial and industrial	$	3,887	$	2,859,539	$	2,370,009	$	3,875,412	$	1,784,347	$	1,009,346	$	977,459	$	874,063	$	13,750,175
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	182,249	$	129,676	$	247,821	$	199,462	$	146,763	$	197,576	$	380,833	$	1,484,380
Special mention	—		1,363		—		4,713		5,016		2,059		90		5,980		19,221
Substandard	—		11,913		1,886		2,097		14,611		14,693		47		23,342		68,589
Nonaccrual	—		—		—		1,797		—		—		524		934		3,255
Commercial real estate - owner occupied	$	—	$	195,525	$	131,562	$	256,428	$	219,089	$	163,515	$	198,237	$	411,089	$	1,575,445
Commercial and business lending:
Risk rating:
Pass	$	3,199	$	2,923,692	$	2,458,064	$	4,035,771	$	1,921,952	$	1,129,411	$	1,038,489	$	1,119,172	$	14,626,551
Special mention	—		24,071		626		31,474		29,524		11,405		5,548		78,561		181,209
Substandard	668		106,666		40,721		35,619		47,343		27,539		130,661		81,668		470,217
Nonaccrual	20		635		2,160		28,976		4,617		4,506		998		5,751		47,643
Commercial and business lending	$	3,887	$	3,055,064	$	2,501,571	$	4,131,840	$	2,003,436	$	1,172,861	$	1,175,696	$	1,285,152	$	15,325,620
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	695,209	$	1,061,877	$	1,762,223	$	662,819	$	438,221	$	679,245	$	844,791	$	6,144,385
Special mention	—		633		33,369		5,553		3,066		48,292		58,136		29,885		178,934
Substandard	—		21,867		10,855		12,186		24,000		5,783		54,229		29,527		158,447
Nonaccrual	—		698		—		793		—		—		7,914		1,779		11,184
Commercial real estate - investor	$	—	$	718,407	$	1,106,101	$	1,780,755	$	689,885	$	492,296	$	799,524	$	905,982	$	6,492,950
Real estate construction:
Risk rating:
Pass	$	—	$	219,286	$	161,036	$	541,782	$	872,017	$	152,821	$	3,414	$	6,963	$	1,957,319
Special mention	—		2,663		—		—		15,405		—		75,656		—		93,724
Substandard	—		25,497		80,123		105,451		7,685		34,493		238,920		—		492,169
Nonaccrual	—		2,913		—		—		—		38		—		23		2,974
Real estate construction	$	—	$	250,359	$	241,159	$	647,233	$	895,107	$	187,352	$	317,990	$	6,986	$	2,546,186
Commercial real estate lending:
Risk rating:
Pass	$	—	$	914,495	$	1,222,913	$	2,304,005	$	1,534,836	$	591,042	$	682,659	$	851,754	$	8,101,704
Special mention	—		3,296		33,369		5,553		18,471		48,292		133,792		29,885		272,658
Substandard	—		47,364		90,978		117,637		31,685		40,276		293,149		29,527		650,616
Nonaccrual	—		3,611		—		793		—		38		7,914		1,802		14,158
Commercial real estate lending	$	—	$	968,766	$	1,347,260	$	2,427,988	$	1,584,992	$	679,648	$	1,117,514	$	912,968	$	9,039,136
Total commercial:
Risk rating:
Pass	$	3,199	$	3,838,187	$	3,680,977	$	6,339,776	$	3,456,788	$	1,720,453	$	1,721,148	$	1,970,926	$	22,728,255
Special mention	—		27,367		33,995		37,027		47,995		59,697		139,340		108,446		453,867
Substandard	668		154,030		131,699		153,256		79,028		67,815		423,810		111,195		1,120,833
Nonaccrual	20		4,246		2,160		29,769		4,617		4,544		8,912		7,553		61,801
Total commercial	$	3,887	$	4,023,830	$	3,848,831	$	6,559,828	$	3,588,428	$	1,852,509	$	2,293,210	$	2,198,120	$	24,364,756

23

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2026		2025		2024		2023		2022		Prior		Total
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	176,272	$	309,720	$	254,049	$	438,829	$	1,461,192	$	4,090,505	$	6,730,567
Special mention	—		—		—		315		—		—		—		188		503
Substandard	—		—		5,355		—		572		366		454		246		6,993
Nonaccrual	—		—		—		2,054		4,408		7,680		11,041		45,152		70,335
Residential mortgage	$	—	$	—	$	181,627	$	312,089	$	259,029	$	446,875	$	1,472,687	$	4,136,091	$	6,808,398
Auto finance:
Risk rating:
Pass	$	—	$	—	$	856,927	$	1,398,649	$	867,078	$	498,862	$	351,555	$	57,048	$	4,030,119
Special mention	—		—		84		1,032		581		868		625		134		3,324
Nonaccrual	—		—		393		1,686		2,058		3,351		3,083		402		10,973
Auto finance	$	—	$	—	$	857,404	$	1,401,367	$	869,717	$	503,081	$	355,263	$	57,584	$	4,044,416
Home equity:
Risk rating:
Pass	$	11,561	$	726,750	$	1,158	$	5,253	$	3,937	$	4,886	$	21,268	$	55,324	$	818,576
Special mention	78		102		—		—		130		—		39		914		1,185
Nonaccrual	272		317		—		102		151		159		1,025		4,828		6,582
Home equity	$	11,911	$	727,169	$	1,158	$	5,355	$	4,218	$	5,045	$	22,332	$	61,066	$	826,343
Other consumer:
Risk rating:
Pass	$	84	$	260,894	$	36,667	$	44,583	$	18,197	$	10,311	$	5,627	$	43,888	$	420,167
Special mention	1		885		—		17		62		47		45		9		1,065
Substandard	—		1,633		—		—		—		—		—		—		1,633
Nonaccrual	—		47		—		60		47		41		53		14		262
Other consumer	$	85	$	263,459	$	36,667	$	44,660	$	18,306	$	10,399	$	5,725	$	43,911	$	423,127
Total consumer:
Risk rating:
Pass	$	11,645	$	987,644	$	1,071,024	$	1,758,205	$	1,143,261	$	952,888	$	1,839,642	$	4,246,765	$	11,999,429
Special mention	79		987		84		1,364		773		915		709		1,245		6,077
Substandard	—		1,633		5,355		—		572		366		454		246		8,626
Nonaccrual	272		364		393		3,902		6,664		11,231		15,202		50,396		88,152
Total consumer	$	11,996	$	990,628	$	1,076,856	$	1,763,471	$	1,151,270	$	965,400	$	1,856,007	$	4,298,652	$	12,102,284
Total loans:
Risk rating:
Pass	$	14,844	$	4,825,831	$	4,752,001	$	8,097,981	$	4,600,049	$	2,673,341	$	3,560,790	$	6,217,691	$	34,727,684
Special mention	79		28,354		34,079		38,391		48,768		60,612		140,049		109,691		459,944
Substandard	668		155,663		137,054		153,256		79,600		68,181		424,264		111,441		1,129,459
Nonaccrual	292		4,610		2,553		33,671		11,281		15,775		24,114		57,949		149,953
Total loans	$	15,883	$	5,014,458	$	4,925,687	$	8,323,299	$	4,739,698	$	2,817,909	$	4,149,217	$	6,496,772	$	36,467,040

(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.

24

The following table presents loans by credit quality indicator by origination year at December 31, 2025:

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	503	$	1,920,351	$	3,886,880	$	2,097,760	$	1,133,873	$	1,238,941	$	521,793	$	471,834	$	11,271,432
Special mention	—		11,139		3,024		311		13,774		5,849		24,971		293		59,361
Substandard	7,290		65,451		60,593		78,773		22,126		162,841		70,231		1,771		461,786
Nonaccrual	1,473		—		25		7,153		—		—		—		—		7,178
Commercial and industrial	$	9,266	$	1,996,941	$	3,950,522	$	2,183,997	$	1,169,773	$	1,407,631	$	616,995	$	473,898	$	11,799,757
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	2,957	$	241,141	$	180,867	$	141,254	$	167,496	$	157,837	$	201,588	$	1,093,140
Special mention	—		—		—		11,620		5,432		—		—		1,242		18,294
Substandard	—		13,445		7,478		14,001		15,635		1,691		11,929		10,508		74,687
Nonaccrual	—		—		203		—		—		—		—		—		203
Commercial real estate - owner occupied	$	—	$	16,402	$	248,822	$	206,488	$	162,321	$	169,187	$	169,766	$	213,338	$	1,186,324
Commercial and business lending:
Risk rating:
Pass	$	503	$	1,923,308	$	4,128,021	$	2,278,627	$	1,275,127	$	1,406,437	$	679,630	$	673,422	$	12,364,572
Special mention	—		11,139		3,024		11,931		19,206		5,849		24,971		1,535		77,655
Substandard	7,290		78,896		68,071		92,774		37,761		164,532		82,160		12,279		536,473
Nonaccrual	1,473		—		228		7,153		—		—		—		—		7,381
Commercial and business lending	$	9,266	$	2,013,343	$	4,199,344	$	2,390,485	$	1,332,094	$	1,576,818	$	786,761	$	687,236	$	12,986,081
Commercial real estate - investor:
Risk rating:
Pass	$	3,195	$	185,825	$	1,842,395	$	776,187	$	503,511	$	711,947	$	432,442	$	503,468	$	4,955,775
Special mention	—		—		40,067		11,135		14,809		58,523		26,964		5,007		156,505
Substandard	—		—		24,090		1,446		7,741		70,608		17,633		3,921		125,439
Nonaccrual	—		—		—		546		—		7,765		—		—		8,311
Commercial real estate - investor	$	3,195	$	185,825	$	1,906,552	$	789,314	$	526,061	$	848,843	$	477,039	$	512,396	$	5,246,030
Real estate construction:
Risk rating:
Pass	$	—	$	33,847	$	359,610	$	720,429	$	223,239	$	175,056	$	2,991	$	5,768	$	1,520,940
Special mention	—		—		20,611		—		—		51,262		—		—		71,873
Substandard	—		—		122,320		42,511		48,980		187,874		—		—		401,685
Nonaccrual	—		—		—		—		—		—		—		144		144
Real estate construction	$	—	$	33,847	$	502,541	$	762,940	$	272,219	$	414,192	$	2,991	$	5,912	$	1,994,642
Commercial real estate lending:
Risk rating:
Pass	$	3,195	$	219,672	$	2,202,005	$	1,496,616	$	726,750	$	887,003	$	435,433	$	509,236	$	6,476,715
Special mention	—		—		60,678		11,135		14,809		109,785		26,964		5,007		228,378
Substandard	—		—		146,410		43,957		56,721		258,482		17,633		3,921		527,124
Nonaccrual	—		—		—		546		—		7,765		—		144		8,455
Commercial real estate lending	$	3,195	$	219,672	$	2,409,093	$	1,552,254	$	798,280	$	1,263,035	$	480,030	$	518,308	$	7,240,672

25

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Total commercial:
Risk rating:
Pass	$	3,698	$	2,142,980	$	6,330,026	$	3,775,243	$	2,001,877	$	2,293,440	$	1,115,063	$	1,182,658	$	18,841,287
Special mention	—		11,139		63,702		23,066		34,015		115,634		51,935		6,542		306,033
Substandard	7,290		78,896		214,481		136,731		94,482		423,014		99,793		16,200		1,063,597
Nonaccrual	1,473		—		228		7,699		—		7,765		—		144		15,836
Total commercial	$	12,461	$	2,233,015	$	6,608,437	$	3,942,739	$	2,130,374	$	2,839,853	$	1,266,791	$	1,205,544	$	20,226,753
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	253,364	$	238,787	$	480,076	$	1,488,335	$	1,499,223	$	2,764,379	$	6,724,164
Substandard	—		—		—		580		292		129		300		—		1,301
Nonaccrual	—		—		2,425		3,102		5,101		13,141		8,985		35,738		68,492
Residential mortgage	$	—	$	—	$	255,789	$	242,469	$	485,469	$	1,501,605	$	1,508,508	$	2,800,117	$	6,793,957
Auto finance:
Risk rating:
Pass	$	—	$	—	$	1,287,267	$	842,838	$	551,549	$	388,064	$	26,402	$	2	$	3,096,122
Special mention	—		—		295		325		814		621		50		—		2,105
Nonaccrual	—		—		559		1,356		2,811		3,255		290		—		8,271
Auto finance	$	—	$	—	$	1,288,121	$	844,519	$	555,174	$	391,940	$	26,742	$	2	$	3,106,498
Home equity:
Risk rating:
Pass	$	15,259	$	623,853	$	855	$	2,188	$	2,728	$	20,514	$	4,733	$	49,793	$	704,664
Special mention	315		52		—		119		190		104		—		368		833
Nonaccrual	1,038		173		2		221		333		1,016		414		5,615		7,774
Home equity	$	16,612	$	624,078	$	857	$	2,528	$	3,251	$	21,634	$	5,147	$	55,776	$	713,271
Other consumer:
Risk rating:
Pass	$	529	$	255,490	$	13,159	$	4,070	$	1,990	$	958	$	264	$	43,575	$	319,506
Special mention	12		1,139		27		—		5		9		—		20		1,200
Substandard	—		2,374		—		—		—		—		—		—		2,374
Nonaccrual	2		35		—		3		12		—		2		3		55
Other consumer	$	543	$	259,038	$	13,186	$	4,073	$	2,007	$	967	$	266	$	43,598	$	323,135
Total consumer:
Risk rating:
Pass	$	15,788	$	879,343	$	1,554,645	$	1,087,883	$	1,036,343	$	1,897,871	$	1,530,622	$	2,857,749	$	10,844,456
Special mention	327		1,191		322		444		1,009		734		50		388		4,138
Substandard	—		2,374		—		580		292		129		300		—		3,675
Nonaccrual	1,040		208		2,986		4,682		8,257		17,412		9,691		41,356		84,592
Total consumer	$	17,155	$	883,116	$	1,557,953	$	1,093,589	$	1,045,901	$	1,916,146	$	1,540,663	$	2,899,493	$	10,936,861
Total loans:
Risk rating:
Pass	$	19,486	$	3,022,323	$	7,884,671	$	4,863,126	$	3,038,220	$	4,191,311	$	2,645,685	$	4,040,407	$	29,685,743
Special mention	327		12,330		64,024		23,510		35,024		116,368		51,985		6,930		310,171
Substandard	7,290		81,270		214,481		137,311		94,774		423,143		100,093		16,200		1,067,272
Nonaccrual	2,513		208		3,214		12,381		8,257		25,177		9,691		41,500		100,428
Total loans	$	29,616	$	3,116,131	$	8,166,390	$	5,036,328	$	3,176,275	$	4,755,999	$	2,807,454	$	4,105,037	$	31,163,614

(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.

26

The following table presents gross charge offs by origination year for the six months ended June 30, 2026:

			Gross Charge Offs by Origination Year
(in thousands)	Rev Loans Amortized Cost Basis		2026		2025		2024		2023		2022		Prior		Total
Commercial and industrial	$	13,356	$	135	$	160	$	254	$	712	$	425	$	6,191	$	21,233
Commercial real estate-owner occupied	—		—		—		—		—		—		—		—
Commercial and business lending	13,356		135		160		254		712		425		6,191		21,233
Commercial real estate-investor	—		—		—		—		—		—		2,710		2,710
Real estate construction	—		—		—		—		—		—		—		—
Commercial real estate lending	—		—		—		—		—		—		2,710		2,710
Total commercial	13,356		135		160		254		712		425		8,901		23,943
Residential mortgage	—		—		6		57		66		24		107		260
Auto finance	—		110		1,125		1,135		1,547		1,742		179		5,838
Home equity	1		—		60		—		2		13		16		92
Other consumer	4,150		10		100		30		26		12		31		4,359
Total consumer	4,151		120		1,291		1,222		1,641		1,791		333		10,549
Total gross charge offs	$	17,507	$	255	$	1,451	$	1,476	$	2,353	$	2,216	$	9,234	$	34,492

The following table presents gross charge offs by origination year for the year ended December 31, 2025:

			Gross Charge Offs by Origination Year
(in thousands)	Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Commercial and industrial	$	5,424	$	831	$	627	$	3,555	$	3,799	$	379	$	—	$	14,615
Commercial real estate-owner occupied	—		—		—		113		—		—		—		113
Commercial and business lending	5,424		831		627		3,668		3,799		379		—		14,728
Commercial real estate-investor	—		—		8,356		184		12,666		—		—		21,206
Real estate construction	—		—		—		—		—		—		—		—
Commercial real estate lending	—		—		8,356		184		12,666		—		—		21,206
Total commercial	5,424		831		8,983		3,852		16,465		379		—		35,934
Residential mortgage	—		—		115		209		320		74		430		1,148
Auto finance	—		432		1,699		2,804		3,384		433		—		8,752
Home equity	—		—		—		26		5		5		380		416
Other consumer	8,194		18		85		63		63		224		56		8,703
Total consumer	8,194		450		1,899		3,102		3,772		736		866		19,019
Total gross charge offs	$	13,618	$	1,281	$	10,882	$	6,954	$	20,237	$	1,115	$	866	$	54,953

Factors that are important to managing overall credit quality are sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, and appropriate policies for ACLL, nonaccrual loans, and charge offs.

For commercial loans, management has determined the pass credit quality indicator to include credits exhibiting acceptable financial statements, cash flow, and leverage. If any risk exists, it is mitigated by the loan structure, collateral, monitoring, or control. For consumer loans, performing loans include credits performing in accordance with the original contractual terms.

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Special mention credits have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit or in the credit position at some future date. Accruing loan modifications could be pass or special mention, depending on the risk rating on the loan. Substandard loans are considered inadequately protected by the current sound worth and paying capacity of the obligor or the collateral pledged, if any. These loans have a well-defined weakness, or weaknesses, which may jeopardize liquidation of the debt, and are characterized by the distinct possibility the Corporation will sustain some loss if the deficiencies are not corrected. Commercial loan relationships over $0.5 million in nonaccrual status, or that otherwise do not share similar risk characteristics with other loans, including those for which a debt restructuring is probable, are evaluated individually for expected credit losses. Commercial loans classified as special mention, substandard, and nonaccrual are reviewed at a minimum on a quarterly basis, while pass credits, which are performing rated credits, are generally reviewed on an annual basis or more frequently if the loan renewal is less than one year or if otherwise warranted.

27

The recorded investment of consumer loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $19.4 million and $20.1 million at June 30, 2026 and December 31, 2025, respectively.

The following table presents loans by past due status at June 30, 2026:

	Accruing
(in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90+ Days Past Due		Nonaccrual(a)(b)		Total
Commercial and industrial	$	13,694,693	$	834	$	9,834	$	426	$	44,388	$	13,750,175
Commercial real estate - owner occupied	1,571,158		893		—		139		3,255		1,575,445
Commercial and business lending	15,265,851		1,727		9,834		565		47,643		15,325,620
Commercial real estate - investor	6,478,677		1,839		1,250		—		11,184		6,492,950
Real estate construction	2,541,775		581		856		—		2,974		2,546,186
Commercial real estate lending	9,020,452		2,420		2,106		—		14,158		9,039,136
Total commercial	24,286,303		4,147		11,940		565		61,801		24,364,756
Residential mortgage	6,724,029		13,531		503		—		70,335		6,808,398
Auto finance	4,013,076		17,043		3,324		—		10,973		4,044,416
Home equity	815,225		3,351		1,185		—		6,582		826,343
Other consumer(c)	418,154		1,899		1,089		1,723		262		423,127
Total consumer	11,970,484		35,824		6,101		1,723		88,152		12,102,284
Total loans	$	36,256,787	$	39,971	$	18,041	$	2,288	$	149,953	$	36,467,040

(a) Of the total nonaccrual loans, $78.9 million, or 53%, were current with respect to payment at June 30, 2026.

(b) No interest income was recognized on nonaccrual loans for the three and six months ended June 30, 2026. In addition, there were $18.2 million of nonaccrual loans for which there was no related ACLL at June 30, 2026.

(c) Past due portions exclude guaranteed student loans.

The following table presents loans by past due status at December 31, 2025:

	Accruing
(in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90+ Days  Past Due		Nonaccrual(a)(b)		Total
Commercial and industrial	$	11,789,526	$	2,153	$	530	$	370	$	7,178	$	11,799,757
Commercial real estate - owner occupied	1,186,087		—		34		—		203		1,186,324
Commercial and business lending	12,975,613		2,153		564		370		7,381		12,986,081
Commercial real estate - investor	5,218,314		14,148		5,257		—		8,311		5,246,030
Real estate construction	1,994,381		117		—		—		144		1,994,642
Commercial real estate lending	7,212,695		14,265		5,257		—		8,455		7,240,672
Total commercial	20,188,308		16,418		5,821		370		15,836		20,226,753
Residential mortgage	6,712,330		13,135		—		—		68,492		6,793,957
Auto finance	3,081,782		14,340		2,105		—		8,271		3,106,498
Home equity	701,719		2,945		833		—		7,774		713,271
Other consumer(c)	317,932		1,473		1,231		2,444		55		323,135
Total consumer	10,813,763		31,893		4,169		2,444		84,592		10,936,861
Total loans	$	31,002,071	$	48,311	$	9,990	$	2,814	$	100,428	$	31,163,614

(a) Of the total nonaccrual loans, $31.2 million, or 31%, were current with respect to payment at December 31, 2025.

(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2025. In addition, there were $14.6 million of nonaccrual loans for which there was no related ACLL at December 31, 2025

(c) Past due portions exclude guaranteed student loans.

Loan Modifications

The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at June 30, 2026 and June 30, 2025.

	Interest Rate Concession
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Commercial and industrial	$	120	$	154	$	273	$	294
Other consumer	727		737		1,330		1,529
Total loans modified	$	847	$	891	$	1,603	$	1,823

28

	Term Extension
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Residential mortgage	$	553	$	305	$	1,059	$	305

	Combination - Interest Rate Concession and Term Extension
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Residential mortgage	$	1,137	$	591	$	3,463	$	2,094
Home equity	37		67		88		125
Total loans modified	$	1,174	$	658	$	3,551	$	2,219

The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans.

	Interest Rate Concession
	Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
Loan Type	2026		2025		2026		2025
Commercial and industrial	(22)	%	(23)	%	(22)	%	(24)	%
Residential mortgage	—	%	2	%	1	%	1	%
Home equity	(2)	%	—	%	(2)	%	(2)	%
Other consumer	(22)	%	(21)	%	(21)	%	(21)	%
Weighted average of total loans modified	(9)	%	(10)	%	(6)	%	(8)	%

(a) Some interest rate concessions may involve an increase in rate that was lower in comparison to prevailing market rates.

	Term Extension
	Financial Effect, Weighted Average Term Increase(a)
	Three Months Ended Jun 30,		Six Months Ended Jun 30,
Loan Type	2026	2025	2026	2025
Residential mortgage	115 months	165 months	107 months	152 months
Home equity	240 months	60 months	131 months	60 months
Weighted average of total loans modified	118 months	158 months	107 months	147 months

(a) During the three months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 300 to 418 months and 268 to 426 months, respectively. During the six months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 305 to 412 months and 267 to 414, respectively.

The Corporation closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2026:

	Payment Status (Amortized Cost Basis)
(in thousands)	Current		30-89 Days Past Due		90+ Days Past Due
Commercial and industrial	$	367	$	—	$	—
Residential mortgage	6,509		943		1,183
Home equity	239		—		27
Other consumer	2,055		—		—
Total loans modified	$	9,170	$	943	$	1,210

29

The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2025:

	Payment Status (Amortized Cost Basis)
(in thousands)	Current		30-89 Days Past Due		90+ Days Past Due
Commercial and industrial	$	431	$	—	$	—
Residential mortgage	3,406		605		702
Home equity	288		31		—
Other consumer	2,303		—		—
Total loans modified	$	6,427	$	635	$	702

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession for loans that were modified in the previous twelve months and subsequently had a payment default during the six months ended June 30, 2026:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
(in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Residential mortgage	$	—	$	—	$	303

None of the loans modified in the previous twelve months subsequently had a payment default during the six months ended June 30, 2025.

The nature and extent of the impairment of modified loans, including those which have experienced a subsequent payment default, are considered in the determination of an appropriate level of the ACLL.

Allowance for Credit Losses on Loans

The ACLL is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the ACLL represents management’s estimate of an amount appropriate to provide for expected lifetime credit losses in the loan portfolio at the balance sheet date. The expected lifetime credit losses are the product of multiplying the Corporation's estimates of probability of default, loss given default, and the individual loan level exposure at default on an undiscounted basis. A main factor in the determination of the ACLL is the economic forecast. The forecast the Corporation used for June 30, 2026 was the Moody's baseline scenario from May 2026, which was reviewed against the June 2026 baseline scenario with no material updates made, over a two-year reasonable and supportable period with straight-line reversion to the historical losses over the second year of the period. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit). See Note 12 for additional information on the change in the allowance for unfunded commitments.

30

The following table presents a summary of the changes in the ACLL by portfolio segment for the six months ended June 30, 2026:

(in thousands)	Dec 31, 2025		Provision for loan losses recorded at acquisition		Allowance for PCD loans acquired		Allowance for PSL acquired		Charge offs		Recoveries		Net (Charge offs) Recoveries		Provision for Credit Losses		Jun 30, 2026		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	168,636	$	294	$	19,514	$	5,086	$	(21,233)	$	893	$	(20,340)	$	29,105	$	202,295
Commercial real estate — owner occupied	11,327		—		2,516		1,198		—		—		—		(1,887)		13,154
Commercial and business lending	179,963		294		22,030		6,284		(21,233)		893		(20,340)		27,218		215,449
Commercial real estate — investor	58,243		—		11,640		7,590		(2,710)		500		(2,210)		(10,475)		64,788
Real estate construction	46,595		—		3,459		3,298		—		4		4		6,065		59,421
Commercial real estate lending	104,838		—		15,099		10,888		(2,710)		504		(2,206)		(4,410)		124,209
Total commercial	284,801		294		37,129		17,172		(23,943)		1,397		(22,546)		22,808		339,658
Residential mortgage	33,644		—		790		1,028		(260)		211		(49)		39		35,452
Auto finance	27,470		—		1,346		7,241		(5,838)		2,487		(3,351)		2,059		34,765
Home equity	16,343		—		174		2,058		(92)		782		690		(765)		18,500
Other consumer	15,810		103		73		764		(4,359)		1,104		(3,255)		1,859		15,354
Total consumer	93,267		103		2,383		11,091		(10,549)		4,584		(5,965)		3,192		104,071
Total loans	$	378,068	$	397	$	39,512	$	28,263	$	(34,492)	$	5,981	$	(28,511)	$	26,000	$	443,729
Allowance for unfunded commitments
Commercial and industrial	$	18,698	$	—	$	1,300	$	689	$	—	$	—	$	—	$	(1,650)	$	19,037
Commercial real estate — owner occupied	132		—		18		21		—		—		—		78		249
Commercial and business lending	18,830		—		1,318		710		—		—		—		(1,572)		19,286
Commercial real estate — investor	499		—		102		28		—		—		—		281		910
Real estate construction	17,947		—		2,169		901		—		—		—		5,243		26,260
Commercial real estate lending	18,446		—		2,271		929		—		—		—		5,524		27,170
Total commercial	37,276		—		3,589		1,639		—		—		—		3,952		46,456
Home equity	2,406		—		8		207		—		—		—		49		2,670
Other consumer	1,594		—		—		25		—		—		—		(1)		1,618
Total consumer	4,000		—		8		232		—		—		—		48		4,288
Total loans	$	41,276	$	—	$	3,597	$	1,871	$	—	$	—	$	—	$	4,000	$	50,744
Allowance for credit losses on loans
Commercial and industrial	$	187,334	$	294	$	20,814	$	5,775	$	(21,233)	$	893	$	(20,340)	$	27,455	$	221,332	1.61	%
Commercial real estate — owner occupied	11,459		—		2,534		1,219		—		—		—		(1,809)		13,403		0.85	%
Commercial and business lending	198,793		294		23,348		6,994		(21,233)		893		(20,340)		25,646		234,735		1.53	%
Commercial real estate — investor	58,742		—		11,742		7,618		(2,710)		500		(2,210)		(10,194)		65,698		1.01	%
Real estate construction	64,542		—		5,628		4,199		—		4		4		11,308		85,681		3.37	%
Commercial real estate lending	123,284		—		17,370		11,817		(2,710)		504		(2,206)		1,114		151,379		1.67	%
Total commercial	322,077		294		40,718		18,811		(23,943)		1,397		(22,546)		26,760		386,114		1.58	%
Residential mortgage	33,644		—		790		1,028		(260)		211		(49)		39		35,452		0.52	%
Auto finance	27,470		—		1,346		7,241		(5,838)		2,487		(3,351)		2,059		34,765		0.86	%
Home equity	18,749		—		182		2,265		(92)		782		690		(716)		21,170		2.56	%
Other consumer	17,404		103		73		789		(4,359)		1,104		(3,255)		1,858		16,972		4.01	%
Total consumer	97,267		103		2,391		11,323		(10,549)		4,584		(5,965)		3,240		108,359		0.90	%
Total loans	$	419,344	$	397	$	43,109	$	30,134	$	(34,492)	$	5,981	$	(28,511)	$	30,000	$	494,473	1.36	%

31

The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2025:

(in thousands)	Dec 31, 2024		Charge offs		Recoveries		Net (Charge offs) Recoveries		Provision for Credit Losses		Dec 31, 2025		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	136,596	$	(14,615)	$	8,357	$	(6,258)	$	38,298	$	168,636
Commercial real estate — owner occupied	9,417		(113)		—		(113)		2,023		11,327
Commercial and business lending	146,013		(14,728)		8,357		(6,371)		40,321		179,963
Commercial real estate — investor	71,547		(21,206)		2,985		(18,221)		4,917		58,243
Real estate construction	51,499		—		154		154		(5,058)		46,595
Commercial real estate lending	123,046		(21,206)		3,139		(18,067)		(141)		104,838
Total commercial	269,060		(35,934)		11,496		(24,438)		40,180		284,801
Residential mortgage	32,576		(1,148)		615		(533)		1,601		33,644
Auto finance	28,467		(8,752)		3,029		(5,723)		4,726		27,470
Home equity	16,620		(416)		999		583		(860)		16,343
Other consumer	16,823		(8,703)		1,837		(6,866)		5,853		15,810
Total consumer	94,486		(19,019)		6,480		(12,539)		11,320		93,267
Total loans	$	363,545	$	(54,953)	$	17,976	$	(36,977)	$	51,500	$	378,068
Allowance for unfunded commitments
Commercial and industrial	$	14,456	$	—	$	—	$	—	$	4,242	$	18,698
Commercial real estate — owner occupied	151		—		—		—		(19)		132
Commercial and business lending	14,607		—		—		—		4,223		18,830
Commercial real estate — investor	578		—		—		—		(79)		499
Real estate construction	19,591		—		—		—		(1,644)		17,947
Commercial real estate lending	20,169		—		—		—		(1,723)		18,446
Total commercial	34,776		—		—		—		2,500		37,276
Home equity	2,465		—		—		—		(59)		2,406
Other consumer	1,535		—		—		—		59		1,594
Total consumer	4,000		—		—		—		—		4,000
Total loans	$	38,776	$	—	$	—	$	—	$	2,500	$	41,276
Allowance for credit losses on loans
Commercial and industrial	$	151,052	$	(14,615)	$	8,357	$	(6,258)	$	42,540	$	187,334	1.59	%
Commercial real estate — owner occupied	9,568		(113)		—		(113)		2,004		11,459		0.97	%
Commercial and business lending	160,620		(14,728)		8,357		(6,371)		44,544		198,793		1.53	%
Commercial real estate — investor	72,125		(21,206)		2,985		(18,221)		4,838		58,742		1.12	%
Real estate construction	71,090		—		154		154		(6,702)		64,542		3.24	%
Commercial real estate lending	143,215		(21,206)		3,139		(18,067)		(1,864)		123,284		1.70	%
Total commercial	303,835		(35,934)		11,496		(24,438)		42,680		322,077		1.59	%
Residential mortgage	32,576		(1,148)		615		(533)		1,601		33,644		0.50	%
Auto finance	28,467		(8,752)		3,029		(5,723)		4,726		27,470		0.88	%
Home equity	19,085		(416)		999		583		(919)		18,749		2.63	%
Other consumer	18,358		(8,703)		1,837		(6,866)		5,912		17,404		5.39	%
Total consumer	98,486		(19,019)		6,480		(12,539)		11,320		97,267		0.89	%
Total loans	$	402,322	$	(54,953)	$	17,976	$	(36,977)	$	54,000	$	419,344	1.35	%

Note 8 Goodwill and Other Intangible Assets

Goodwill

The Corporation conducted its most recent annual impairment testing in May 2026, utilizing a qualitative assessment. Based on this assessment, management concluded that it is more likely than not that the estimated fair value exceeded the carrying value (including goodwill) for each reporting unit. Therefore, a step one quantitative analysis was not required. There have been no events since the May 2026 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in the first six months of 2025 or 2026.

The Corporation added $42.1 million goodwill related to the American National acquisition in the second quarter of 2026. The Corporation had goodwill of $1.1 billion at both June 30, 2026 and December 31, 2025.

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Core Deposit Intangibles

The Corporation has CDIs which are amortized. CDI recorded as part of the American National acquisition is amortized over ten years using the sum of digits method while prior acquisitions are amortized under the straight line method. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:

(in thousands)	Six Months Ended Jun 30, 2026		Year Ended Dec 31, 2025
Core deposit intangibles
Gross carrying amount at the beginning of period	$	88,109	$	88,109
Additions during the period	103,200		—
Accumulated amortization	(74,356)		(65,260)
Net book value	$	116,953	$	22,849
Amortization during the period	$	9,096	$	8,811

Mortgage Servicing Rights

A summary of changes in the balance of the MSRs asset under the fair value measurement method is as follows:

(in thousands)	Six Months Ended Jun 30, 2026			Year Ended Dec 31, 2025
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$	86,337		$	87,683
Additions	6,159			8,716
Decay	(4,899)			(8,621)
Valuation:
Changes in fair value of asset	86			(1,441)
Mortgage servicing rights at end of period	$	87,683		$	86,337
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)	$	6,160,254		$	6,191,012
Mortgage servicing rights to servicing portfolio	1.42		%	1.39		%

The projections of amortization expense for CDIs and decay for MSRs are based on existing asset balances, the current interest rate environment, and prepayment speeds as of June 30, 2026. The actual expense the Corporation recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements, and events or circumstances that indicate the carrying amount of an asset may not be recoverable. The following table shows the estimated future yearly amortization expense for CDIs and decay for MSRs:

(in thousands)	Core Deposit Intangibles		Mortgage Servicing Rights
Six Months Ended December 31, 2026	$	13,788	$	4,817
2027	26,167		11,601
2028	18,965		11,838
2029	15,285		11,189
2030	11,788		10,214
2031	9,851		9,123
Beyond 2031	21,109		28,901
Total estimated amortization expense and MSRs decay(a)	$	116,953	$	87,683

(a) Includes the decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns.

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Note 9 Short and Long-Term Funding

The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year):

(in thousands)	June 30, 2026		December 31, 2025
Short-term funding
Federal funds purchased	$	473,905	$	260,070
Securities sold under agreements to repurchase	55,371		47,794
Federal funds purchased and securities sold under agreements to repurchase	$	529,276	$	307,864
Long-term funding
Corporation senior notes, at par	$	300,000	$	300,000
Corporation subordinated notes, at par	300,000		300,000
Discount and capitalized costs	(6,895)		(7,484)
Subordinated debt fair value hedge(a)	(2,025)		1,760
Total long-term funding	$	591,080	$	594,276
Total short and long-term funding, excluding FHLB advances	$	1,120,356	$	902,140
FHLB advances
Short-term FHLB advances	$	4,315,000	$	2,855,250
Long-term FHLB advances	263,115		414,122
FHLB advances fair value hedge(a)	(3,434)		(1,278)
Total FHLB advances	$	4,574,681	$	3,268,094
Total short and long-term funding	$	5,695,037	$	4,170,234

(a) For additional information on the fair value hedges, see Note 10.

Securities Sold Under Agreements to Repurchase

The Corporation enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Corporation may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Corporation to repurchase the assets. The obligation to repurchase the securities is reflected as a liability on the Corporation’s consolidated balance sheets, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts (i.e., there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities).

The Corporation utilizes repurchase agreements to facilitate the needs of its customers. The fair value of securities pledged to secure repurchase agreements may decline. At June 30, 2026, the Corporation had pledged securities valued at 202% of the gross outstanding balance of repurchase agreements to manage this risk.

The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets is presented in the following table:

	Overnight and Continuous
(in thousands)	June 30, 2026		December 31, 2025
Repurchase agreements
Agency mortgage-related securities	$	55,371	$	47,794

Long-Term Funding

Senior Notes

In August 2024, the Corporation issued $300.0 million in aggregate principal amount of 6.455% Fixed Rate / Floating Rate Senior Notes due August 29, 2030. During the period from, and including, August 29, 2024, to, but excluding, August 29, 2029, the senior notes will have a fixed coupon interest rate of 6.455% per annum, payable semi-annually in arrears. During the period from, and including, August 29, 2029, to, but excluding, the maturity date, the senior notes will have a floating rate per annum equal to Compounded SOFR, as defined in the Global Note issued in connection with the senior notes, plus 3.030%, payable quarterly in arrears. Prior to August 29, 2029, the Corporation may, at its option, redeem the senior notes, in whole or in part, at any time and from time to time, by paying the redemption price, as defined in the Global Note issued in connection with the senior notes, plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. On August 29, 2029, the Corporation may at its option, redeem the senior notes, in whole, but not in part, by paying the aggregate principal amount of the notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. At any time and from time to time on or after July 30, 2030 (30 days prior to the maturity date), the Corporation may, at its option,

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redeem the senior notes in whole or in part by paying the aggregate principal amount of the senior notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. The senior notes were issued at a discount.

Subordinated Notes 

In February 2023, the Corporation issued $300.0 million of 10-year subordinated notes, due March 1, 2033 and redeemable in whole or in part at the Corporation's option (i) on the reset date of March 1, 2028 and any interest payment date thereafter, (ii) at any time on or after the three month period prior to the maturity date, and (iii) upon the occurrence of a Regulatory Capital Treatment Event, as defined in the Global Note issued in connection with the subordinated notes. The subordinated notes have a fixed coupon interest rate of 6.625% until the reset date, after which the rate will be equal to the Five-Year U.S. Treasury Rate as of the reset date plus 2.812% per annum. The notes were issued at a discount.

FHLB Advances

Under agreements with the FHLB of Chicago, FHLB advances are secured by pledging qualifying collateral of the subsidiary bank (such as residential mortgage loans, residential mortgage loans held for sale, home equity loans, CRE loans, and investment securities). The FHLB advances had maturity or call dates ranging from 2026 through 2031 at June 30, 2026.

Note 10 Derivative and Hedging Activities

The Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future known and uncertain cash amounts, the value of which are determined by interest and currency rates as well as other economic conditions.

At inception, the Corporation designates the derivative contract as either a fair value hedge (i.e., a hedge of the fair value of a recognized asset or liability), a cash flow hedge (i.e., a hedge of the variability of cash flows to be received or paid related to a recognized asset or liability), or a non-designated hedge. The hedge accounting methodologies applied for fair value, cash flow, and non-designated hedges are described in the Derivative and Hedging Activities note in the Corporation's 2025 Annual Report on Form 10-K.

The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. The Corporation is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. To mitigate the counterparty risk, contracts generally contain language outlining collateral pledging requirements for each counterparty. For non-centrally cleared derivatives, collateral must be posted when the market value exceeds certain mutually agreed upon threshold limits. Securities and cash are often pledged as collateral. The Corporation pledged $73.8 million and $79.4 million of investment securities as collateral at June 30, 2026, and December 31, 2025, respectively. Cash is often pledged or received as collateral for derivatives that are not centrally cleared. The Corporation's cash collateral pledged was $3.5 million at June 30, 2026 and $11.8 million at December 31, 2025. For fair value information and disclosures and for the Corporation's accounting policy for derivative and hedging activities, see the Fair Value Measurements and Summary of Significant Accounting Policies notes in the Corporation's 2025 Annual Report on Form 10-K.

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The following table presents the total notional amounts and gross fair values of the Corporation's derivatives, as well as the balance sheet netting adjustments:

	Jun 30, 2026								Dec 31, 2025
	Asset				Liability				Asset				Liability
(in thousands)	Notional Amount		Fair Value		Notional Amount		Fair Value		Notional Amount		Fair Value		Notional Amount		Fair Value
Designated as hedging instruments:
Interest rate-related instruments(a)	$	1,150,000	$	1,435	$	1,650,000	$	6,737	$	2,425,000	$	10,517	$	25,000	$	1
Foreign currency exchange forwards	48,307		1,355		269,686		303		280,159		757		38,384		194
Total designated as hedging instruments			2,790				7,040				11,274				195
Not designated as hedging instruments:
Interest rate-related and other instruments	5,496,857		61,693		6,553,249		111,446		4,775,818		66,787		7,072,274		108,631
Foreign currency exchange forwards	65,014		440		13,535		198		48,904		1,731		43,787		1,517
Mortgage banking(b)	68,998		1,432		141,000		397		39,998		814		107,000		444
Total not designated as hedging instruments			63,565				112,041				69,332				110,592
Gross derivatives before netting			66,355				119,081				80,606				110,787
Less: Legally enforceable master netting agreements			9,343				9,343				12,839				12,839
Less: Cash collateral pledged/received			17,769				720				10,343				8,334
Total derivative instruments, after netting			$	39,243			$	109,018			$	57,424			$	89,614

(a) The notional amounts of the interest rate-related instruments designated as hedging instruments include forward starting interest rate swaps. As of June 30, 2026, this includes swaps with an effective dates of November 1, 2026 to December 1, 2026 that had an asset notational and fair value of $100.0 million and $0.2 million, respectively, and a liability notional amount and fair value of $250.0 million and $1.5 million, respectively. As of December 31, 2025, the Corporation did not have any forward starting interest rate-swaps.
(b) The mortgage derivative asset includes interest rate lock commitments, while the mortgage derivative liability includes forward commitments. Given the fair value position as of June 30, 2026, the fair value of the mortgage derivative asset included $1.4 million of interest rate lock commitments and the derivative liability included $0.4 million of forward commitments. Given the fair value position as of December 31, 2025, the fair value of the mortgage derivative asset included $0.8 million of interest rate lock commitments and the derivative liability included $0.4 million of forward commitments.

The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges:

	Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included
	Carrying Amount of the Hedged Assets/(Liabilities)(a)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		Carrying Amount of the Hedged Assets/(Liabilities)(a)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
(in thousands)	Jun 30, 2026				Dec 31, 2025
Other long-term funding	$	(297,975)	$	2,025	$	(301,760)	$	(1,760)
FHLB Advances	(196,566)		3,434		(198,722)		1,278
Total	$	(494,541)	$	5,459	$	(500,482)	$	(482)

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At June 30, 2026 and December 31, 2025, the carrying amount excluded for foreign currency denominated loans was $318.0 million and $318.5 million, respectively.

The Corporation terminated its $500.0 million fair value hedge during the fourth quarter of 2019. At June 30, 2026, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $151.4 million and is included in loans on the consolidated balance sheets. This amount includes $0.7 million of hedging adjustments on the discontinued hedging relationships, which are not presented in the table above.

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The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income:

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value and Cash Flow Hedging Relationships
	Three Months Ended Jun 30,								Six Months Ended Jun 30,
	2026				2025				2026				2025
(in thousands)	Interest Income		Interest (Expense)		Interest Income		Interest (Expense)		Interest Income		Interest (Expense)		Interest Income		Interest (Expense)
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded(a)	$	565	$	(380)	$	(1,464)	$	(1,942)	$	1,169	$	(777)	$	(2,614)	$	(4,160)
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items	(31)		2,952		(27)		(4,099)		(174)		5,942		(58)		(11,096)
Derivatives designated as hedging instruments(a)	597		(3,332)		(1,437)		2,158		1,343		(6,719)		(2,555)		6,936

(a) Includes net settlements on the derivatives.

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value Hedging Relationships
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
	2026		2025		2026		2025
(in thousands)	Capital Markets, Net		Capital Markets, Net		Capital Markets, Net		Capital Markets, Net
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded	$	51	$	—	$	53	$	1
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items	(13,163)		19,542		(18,086)		20,095
Derivatives designated as hedging instruments	13,214		(19,542)		18,139		(20,093)

The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss):

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivatives(a)	$	(6,506)	$	1,264	$	(14,418)	$	8,532
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)	(597)		1,437		(1,343)		2,555

(a) The entirety of gains (losses) recognized in OCI as well as those reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness.

Amounts reported in accumulated other comprehensive income (loss) related to cash flow hedge derivatives are reclassified to interest income as interest payments are made on the hedged variable interest rate assets. The Corporation estimates that $3.1 million will be reclassified as a decrease to interest income over the next 12 months. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, or the addition of other hedges subsequent to June 30, 2026. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 41 months as of June 30, 2026.

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The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income:

	Consolidated Statements of Income Category of Gain / (Loss)  Recognized in Income	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)		2026		2025		2026		2025
Derivative instruments
Interest rate-related and other instruments — customer and mirror, net	Capital markets, net	$	(1)	$	(42)	$	(31)	$	(90)
Interest rate-related instruments — MSRs hedge	Mortgage banking, net	(420)		(308)		(219)		1,158
Foreign currency exchange forwards	Capital markets, net	202		(1,075)		642		(575)
Interest rate lock commitments (mortgage)	Mortgage banking, net	595		933		617		1,594
Forward commitments (mortgage)	Mortgage banking, net	(1,339)		(779)		46		(1,616)

Note 11 Balance Sheet Offsetting

Interest Rate-Related Instruments and Foreign Exchange Forwards (“Interest and Foreign Exchange Agreements”)

The Corporation is permitted to present derivative receivables and derivative payables with the same counterparty and the related cash collateral receivables and payables on a net basis on the consolidated balance sheets when a legally enforceable master netting agreement exists. The Corporation has elected to net such balances where it has determined that the specified conditions are met.

The Corporation uses master netting agreements to mitigate counterparty credit risk in these transactions, including derivative contracts. A master netting agreement is a single agreement with a counterparty that permits multiple transactions governed by that agreement to be terminated or accelerated and settled through a single payment in a single currency in the event of a default (e.g., bankruptcy, failure to make a required payment or securities transfer, or failure to deliver collateral or margin when due).

Typical master netting agreements for these types of transactions also contain a collateral/margin agreement that provides for a security interest in, or title transfer of, securities or cash collateral/margin to the party that has the right to demand margin (the "demanding party"). The collateral/margin agreement typically requires a party to transfer collateral/margin to the demanding party with a value equal to the amount of the margin deficit on a net basis across all transactions governed by the master netting agreement, less any threshold. The collateral/margin agreement grants to the demanding party, upon default by the counterparty, the right to offset any amounts payable by the counterparty against any posted collateral or the cash equivalent of any posted collateral/margin. It also grants to the demanding party the right to liquidate collateral/margin and to apply the proceeds to an amount payable by the counterparty.

For additional information on the Corporation’s derivative and hedging activities, see the Derivative and Hedging Activities note in the Corporation's 2025 Annual Report on Form 10-K.

The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Liabilities Offset		Cash Collateral Received				Security Collateral Received		Net Amount
Derivative assets
June 30, 2026	$	48,451	$	(9,343)	$	(17,769)	$	21,339	$	(17,912)	$	3,427
December 31, 2025	42,468		(12,839)		(10,343)		19,286		(18,131)		1,155

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Assets Offset		Cash Collateral Pledged				Security Collateral Pledged		Net  Amount
Derivative liabilities
June 30, 2026	$	15,109	$	(9,343)	$	(720)	$	5,046	$	—	$	5,046
December 31, 2025	23,006		(12,839)		(8,334)		1,833		—		1,833

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Note 12 Commitments, Off-Balance Sheet Arrangements, and Legal Proceedings

The Corporation utilizes a variety of financial instruments in the normal course of business to meet the financial needs of its customers and to manage its own exposure to fluctuations in interest rates. These financial instruments include lending-related and other commitments (see below) as well as derivative instruments (see Note 10). The following is a summary of lending-related commitments:

(in thousands)	Jun 30, 2026		Dec 31, 2025
Commitments to extend credit(a), excluding commitments to originate residential mortgage loans held for sale(b)	$	13,006,388	$	11,872,816
Commercial letters of credit(a)	589		425
Standby letters of credit(c)	252,770		222,047

(a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at June 30, 2026 or December 31, 2025.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2.4 million at June 30, 2026 and $2.2 million at December 31, 2025, as an estimate of the fair value of these financial instruments.

Lending-related Commitments

As a financial services provider, the Corporation routinely enters into commitments to extend credit. Such commitments are subject to the same credit policies and approval process accorded to loans made by the Corporation, with each customer’s creditworthiness evaluated on a case-by-case basis. The commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to these financial instruments is represented by the contractual amount of those instruments. The amount of collateral obtained, if deemed necessary by the Corporation upon extension of credit, is based on management’s credit evaluation of the customer. Since a significant portion of commitments to extend credit are subject to specific restrictive loan covenants or may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. An allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded commitments (including unfunded loan commitments and letters of credit).

The following table presents a summary of the changes in the allowance for unfunded commitments:

(in thousands)	Six Months Ended Jun 30, 2026		Year Ended Dec 31, 2025
Allowance for unfunded commitments
Balance at beginning of period	$	41,276	$	38,776
Initial allowance for PCD unfunded commitments	3,597		—
Initial allowance for purchased seasoned unfunded commitments	1,871		—
Provision for unfunded commitments	4,000		2,500
Balance at end of period	$	50,744	$	41,276

Lending-related commitments include commitments to extend credit, commitments to originate residential mortgage loans held for sale, commercial letters of credit, and standby letters of credit. Commitments to extend credit are legally binding agreements to lend to customers at predetermined interest rates, as long as there is no violation of any condition established in the contracts. Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments is recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s derivative and hedging activity is further described in Note 10. Commercial and standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party, while standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party.

Other Commitments

The Corporation invests in qualified affordable housing projects, historic projects, new market projects, and opportunity zone funds for the purpose of community reinvestment and obtaining tax credits and other tax benefits. Return on the Corporation's investment in these projects and funds comes in the form of the tax credits and tax losses that pass through to the Corporation.

The aggregate carrying value of investments in qualified affordable housing and historic projects at June 30, 2026 was $161.3 million, compared to $174.3 million at December 31, 2025, included in tax credit and other investments on the consolidated balance sheets. The Corporation's remaining investments accounted for under the proportional amortization method totaled $160.0 million at June 30, 2026 and $172.2 million at December 31, 2025.

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Under the proportional amortization method, the Corporation amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. The following table summarizes income tax credits, other income tax benefits, and investment amortization generated from the Corporation's investments in these projects, which are recognized as a component within income tax expense on the consolidated statements of income and included in the change in net income tax position and amortization of tax credit investments on the consolidated statements of cash flows:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Income tax credits and other income tax benefits recognized	$	10,406	$	10,772	$	19,543	$	20,230
Amortization expense	8,692		8,369		17,146		17,058

The Corporation’s unfunded contributions relating to investments in qualified affordable housing and historic projects are recorded in accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s remaining unfunded contributions totaled $22.5 million at June 30, 2026 and $22.8 million at December 31, 2025.

For the three and six months ended June 30, 2026 and 2025, the Corporation recorded impairment of $0.9 million related to qualified affordable housing investments and historic tax credits which was recognized through asset gains (losses), net on the consolidated statements of income and included in the net change in other assets and liabilities on the consolidated statements of cash flows.

The Corporation has principal investment commitments to provide capital-based financing to private companies through either direct investment in specific companies or through investment funds and partnerships. The timing of future cash requirements to fund such principal investment commitments is generally dependent on the investment cycle, whereby privately held companies are funded by private equity investors and ultimately sold, merged, or taken public through an initial public offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The timing of future cash requirements to fund these pools is dependent upon loan demand, which can vary over time. The aggregate carrying value of these investments was $74.3 million at June 30, 2026 and $62.3 million at December 31, 2025, included in tax credit and other investments on the consolidated balance sheets.

Legal Proceedings

The Corporation is party to various pending and threatened claims and legal proceedings arising in the normal course of business activities, some of which involve claims for substantial amounts. Although there can be no assurance as to the ultimate outcomes, the Corporation believes it has meritorious defenses to the claims asserted against it in its currently outstanding matters and intends to continue to defend itself vigorously with respect to such legal proceedings. The Corporation will consider settlement of cases when, in management’s judgment, it is in the best interests of the Corporation and its shareholders.

Management believes that the legal proceedings currently pending against it should not have a material adverse effect on the Corporation’s consolidated financial condition. However, in light of the uncertainties involved in such proceedings, there is no assurance that the ultimate resolution of these matters will not significantly exceed the reserves the Corporation has currently accrued or that a matter will not have material reputational or other qualitative consequences. As a result, the outcome of a particular matter may be material to the Corporation’s operating results for a particular period, depending on, among other factors, the size of the loss or liability imposed and the level of the Corporation’s income for that period.

Mortgage Repurchase Reserve

The Corporation sells residential mortgage loans to investors in the normal course of business. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages originated under the Corporation's usual underwriting procedures, and are most often sold on a nonrecourse basis, primarily to the GSEs. The Corporation’s agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold, related to credit information, loan documentation, collateral, and insurability. Subsequent to being sold, if a material underwriting deficiency or documentation defect is discovered, the Corporation may be obligated to repurchase the loan or reimburse the GSEs for losses incurred (collectively, “make whole requests”). The make whole requests and any related risk of loss under the representations and warranties are largely driven by borrower performance. The Corporation also sells qualifying residential mortgage loans guaranteed by U.S. government agencies into GNMA pools.

As a result of make whole requests, the Corporation has repurchased loans with aggregate principal balances of $2.9 million and $3.5 million for the six months ended June 30, 2026 and the year ended December 31, 2025, respectively. There were no loss reimbursement and settlement claims paid in the six months ended June 30, 2026 or for the year ended December 31, 2025. Make whole requests since January 1, 2025 generally arose from loans originated since January 1, 2022 with balances totaling $4.3 billion at the time of sale, consisting primarily of loans sold to GSEs. As of June 30, 2026, $2.0 billion of those loans originated since January 1, 2022 remain outstanding.

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The balance in the mortgage repurchase reserve at the balance sheet date reflects the estimated amount of potential loss the Corporation could incur from repurchasing a loan, as well as loss reimbursements, indemnifications, and other settlement resolutions. The mortgage repurchase reserve, included in accrued expenses and other liabilities on the consolidated balance sheets, was $0.4 million at June 30, 2026 and $0.3 million at December 31, 2025.

The Corporation may also sell residential mortgage loans with limited recourse (limited in that the recourse period ends prior to the loan’s maturity, usually after certain time and/or loan paydown criteria have been met), whereby repurchase could be required if the loan had defined delinquency issues during the limited recourse periods. At June 30, 2026 and December 31, 2025, there were $12.2 million and $11.4 million, respectively, of residential mortgage loans sold with such recourse risk. There have been limited instances and immaterial historical losses on repurchases for recourse under the limited recourse criteria.

The Corporation has a subordinate position to the FHLB in the credit risk on residential mortgage loans it sold to the FHLB Mortgage Partnership Finance Traditional program in exchange for a monthly credit enhancement fee. At June 30, 2026 and December 31, 2025, there were $365.8 million and $273.4 million, respectively, of such residential mortgage loans with credit risk recourse, upon which there have been immaterial historical losses to the Corporation.

Note 13 Fair Value Measurements

Fair value represents the estimated price at which an orderly transaction to sell an asset or to transfer a liability would take place between market participants at the measurement date under current market conditions (i.e., an exit price concept).

The valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis are described in the Fair Value Measurements note in the Corporation’s 2025 Annual Report on Form 10-K, as well as Note 3 Business Combinations.

41

The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments, aggregated by the level in the fair value hierarchy within which those measurements fall:

	Jun 30, 2026
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	548,057	$	548,057	$	548,057	$	—	$	—
Interest-bearing deposits in other financial institutions	1,268,379		1,268,379		1,268,379		—		—
Federal funds sold and securities purchased under agreements to resell	14,355		14,355		14,355		—		—
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)	7,240		7,240		—		7,240		—
Residential mortgage-related securities:
FNMA / FHLMC	137,288		137,288		—		137,288		—
GNMA	5,491,648		5,491,648		—		5,491,648		—
Commercial mortgage-related securities:
FNMA / FHLMC	410,221		410,221		—		410,221		—
GNMA	106,844		106,844		—		106,844		—
Asset backed securities:
FFELP	88,212		88,212		—		88,212		—
SBA	120,070		120,070		—		120,070		—
Other debt securities(b)	5,063		5,063		—		3,000		2,063
Total AFS investment securities	6,366,586		6,366,586		—		6,364,523		2,063
HTM investment securities:
U.S. Treasury securities	997		1,002		1,002		—		—
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,468,604		—		1,468,604		—
Residential mortgage-related securities:
FNMA / FHLMC	790,729		660,737		—		660,737		—
GNMA	37,215		34,626		—		34,626		—
Private-label	292,007		246,460		—		246,460		—
Commercial mortgage-related securities:
FNMA / FHLMC	757,723		644,300		—		644,300		—
GNMA	40,423		36,089		—		36,089		—
Total HTM investment securities	3,510,775		3,091,818		1,002		3,090,816		—
Equity securities:
Equity securities	14,960		14,960		14,960		—		—
Equity securities at NAV	15,000		15,000
Total equity securities	29,960		29,960
Regulatory stocks	329,436		329,436		—		329,436		—
Residential loans held for sale	94,490		94,490		—		94,490		—
Commercial loans held for sale	15,000		15,000		—		15,000		—
Loans, net	35,976,291		35,021,793		—		—		35,021,793
Bank and corporate owned life insurance	717,116		717,116		—		717,116		—
Mortgage servicing rights, net	87,683		87,683		—		—		87,683
Interest rate-related instruments designated as hedging instruments(a)	1,435		1,435		—		1,435		—
Foreign currency exchange forwards designated as hedging instruments(a)	1,355		1,355		—		1,355		—
Interest rate-related and other instruments not designated as hedging instruments(a)	61,693		61,693		—		61,693		—
Foreign currency exchange forwards not designated as hedging instruments(a)	440		440		—		440		—
Interest rate lock commitments to originate residential mortgage loans held for sale	1,432		1,432		—		—		1,432
Total selected assets at fair value	$	49,024,483	$	47,651,028	$	1,846,753	$	10,676,304	$	35,112,971

(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

(b) The quantifiable unobservable input for fair value measurement of the Level 3 classified security is externally developed.

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	Jun 30, 2026
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Brokered CDs	$	3,933,787	$	3,923,505	$	—	$	3,923,505	$	—
Other time deposits	4,782,343		4,771,175		—		4,771,175		—
Federal funds purchased and securities sold under agreements to repurchase	529,276		529,276		529,276		—		—
FHLB advances	4,574,681		4,568,111		—		4,568,111		—
Senior and subordinated debt	591,080		589,506		—		589,506		—
Standby letters of credit(a)	2,365		2,365		—		2,365		—
Interest rate-related instruments designated as hedging instruments(b)	6,737		6,737		—		6,737		—
Foreign currency exchange forwards designated as hedging instruments(b)	303		303		—		303		—
Interest rate-related and other instruments not designated as hedging instruments(b)	111,446		111,446		—		111,446		—
Foreign currency exchange forwards not designated as hedging instruments(b)	198		198		—		198		—
Forward commitments to sell residential mortgage loans	397		397		—		—		397
Total selected liabilities at fair value	$	14,532,613	$	14,503,019	$	529,276	$	13,973,346	$	397

(a) The commitment on standby letters of credit was $252.8 million at June 30, 2026. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

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	Dec 31, 2025
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	574,698	$	574,698	$	574,698	$	—	$	—
Interest-bearing deposits in other financial institutions	1,144,123		1,144,123		1,144,123		—		—
Federal funds sold and securities purchased under agreements to resell	1,400		1,400		1,400		—		—
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)	3,044		3,044		—		3,044		—
Residential mortgage-related securities:
FNMA / FHLMC	129,863		129,863		—		129,863		—
GNMA	5,039,829		5,039,829		—		5,039,829		—
Commercial mortgage-related securities:
FNMA / FHLMC	16,958		16,958		—		16,958		—
GNMA	109,556		109,556		—		109,556		—
Asset backed securities:
FFELP	95,046		95,046		—		95,046		—
SBA	269		269		—		269		—
Other debt securities	2,998		2,998		—		2,998		—
Total AFS investment securities	5,397,563		5,397,563		—		5,397,563		—
HTM investment securities:
U.S. Treasury securities	996		1,015		1,015		—		—
Obligations of state and political subdivisions (municipal securities)	1,628,088		1,507,302		—		1,507,302		—
Residential mortgage-related securities:
FNMA / FHLMC	823,630		696,462		—		696,462		—
GNMA	39,123		36,884		—		36,884		—
Private-label	302,817		258,827		—		258,827		—
Commercial mortgage-related securities:
FNMA / FHLMC	763,370		650,366		—		650,366		—
GNMA	44,552		40,138		—		40,138		—
Total HTM investment securities	3,602,576		3,190,994		1,015		3,189,979		—
Equity securities:
Equity securities	11,060		11,060		11,060		—		—
Equity securities at NAV	15,000		15,000
Total equity securities	26,060		26,060
Regulatory stocks	252,514		252,514		—		252,514		—
Residential loans held for sale	72,499		72,499		—		72,499		—
Loans, net	30,766,886		29,970,788		—		—		29,970,788
Bank and corporate owned life insurance	694,452		694,452		—		694,452		—
Mortgage servicing rights, net	86,337		86,337		—		—		86,337
Interest rate-related instruments designated as hedging instruments(a)	10,517		10,517		—		10,517		—
Foreign currency exchange forwards designated as hedging instruments(a)	757		757		—		757		—
Interest rate-related and other instruments not designated as hedging instruments(a)	66,787		66,787		—		66,787		—
Foreign currency exchange forwards not designated as hedging instruments(a)	1,731		1,731		—		1,731		—
Interest rate lock commitments to originate residential mortgage loans held for sale	814		814		—		—		814
Total selected assets at fair value	$	42,699,714	$	41,492,034	$	1,732,296	$	9,686,799	$	30,057,939

(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

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	Dec 31, 2025
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Brokered CDs	$	3,795,133	$	3,791,245	$	—	$	3,791,245	$	—
Other time deposits	4,041,178		4,035,549		—		4,035,549		—
Federal funds purchased and securities sold under agreements to repurchase	307,864		307,864		307,864		—		—
FHLB advances	3,268,094		3,267,836		—		3,267,836		—
Senior and subordinated debt	594,276		598,141		—		598,141		—
Standby letters of credit(a)	2,225		2,225		—		2,225		—
Interest rate-related instruments designated as hedging instruments(b)	1		1		—		1		—
Foreign currency exchange forwards designated as hedging instruments(b)	194		194		—		194		—
Interest rate-related and other instruments not designated as hedging instruments(b)	108,631		108,631		—		108,631		—
Foreign currency exchange forwards not designated as hedging instruments(b)	1,517		1,517		—		1,517		—
Forward commitments to sell residential mortgage loans	444		444		—		—		444
Total selected liabilities at fair value	$	12,119,557	$	12,113,647	$	307,864	$	11,805,339	$	444

(a) The commitment on standby letters of credit was $222.0 million at December 31, 2025. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

The table below presents a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage derivatives measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy:

(in thousands)	Interest rate lock commitments to originate residential mortgage loans held for sale		Forward commitments to sell residential mortgage loans
Balance December 31, 2024	$	327	$	(254)
New production	13,435		(3,998)
Closed loans / settlements	(13,690)		2,738
Other	742		1,958
Change in mortgage derivative	487		698
Balance December 31, 2025	814		444
New production	7,629		(2,240)
Closed loans / settlements	(6,308)		2,910
Other	(703)		(717)
Change in mortgage derivative	618		(47)
Balance June 30, 2026	$	1,432	$	397

Refer to Note 8 for a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage servicing rights measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy.

The following table presents a rollforward of the fair value of Level 3 equity securities that are measured under the measurement alternative, and the related adjustments recorded during the periods presented for those securities with observable price changes:

(in thousands)
Fair value as of December 31, 2024	$	72
Purchases	14
Sales	(23)
Transfers out of level 3	(63)
Fair value as of December 31, 2025	$	—

The Corporation did not have any activity for Level 3 equity securities for the six months ended June 30, 2026.

The Corporation acquired a Level 3 AFS debt security upon the acquisition of American National on April 1, 2026. The security was valued at $2.1 million and no related adjustments to fair value have been recorded as of June 30, 2026.

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The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall:

		Fair Value
(in thousands)	Fair Value Hierarchy	June 30, 2026		December 31, 2025
Assets
Individually evaluated loans	Level 3	$	48,296	$	18,659
OREO(a)	Level 2	1,397		770

(a) These assets are held at lower of its carrying amount or fair value less cost to sell. Assets included here are those that were adjusted to fair value less cost to sell during the period.

The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements:

June 30, 2026	Valuation Technique	Significant Unobservable Input	Range of Inputs			Weighted Average Input Applied
Mortgage servicing rights	Discounted cash flow	Option adjusted spread	5%	-	8%	5%
Mortgage servicing rights	Discounted cash flow	Constant prepayment rate	—%	-	100%	8%
Individually evaluated loans	Discounted cash flow	Discount factor	45%	-	45%	45%
Individually evaluated loans	Market approach	Appraisal / Cost to sell	44%	-	80%	53%
Interest rate lock commitments to originate residential mortgage loans held for sale	Discounted cash flow	Closing ratio	70%	-	100%	92%

Note 14 Retirement Plans

The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefit allocations are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. As part of acquisition-related integration activities, employees who become eligible for participation in the RAP are generally provided service credit for their employment with the acquired institution for eligibility and vesting purposes.

The Corporation also provides legacy healthcare access to a limited group of retired employees from a previous acquisition in the Postretirement Plan. There are no other active retiree healthcare plans.

The components of net periodic pension benefit and net periodic cost for the RAP and Postretirement Plan were as follows:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
RAP
Service cost	$	869	$	810	$	1,737	$	1,619
Interest cost	2,749		2,814		5,499		5,628
Expected return on plan assets	(9,772)		(9,809)		(19,544)		(19,619)
Amortization of prior service credit	(44)		(44)		(89)		(89)
Total net periodic pension benefit	$	(6,198)	$	(6,230)	$	(12,397)	$	(12,460)
Postretirement Plan
Interest cost	$	22	$	26	$	43	$	53
Amortization of prior service credit	(19)		(19)		(38)		(38)
Amortization of actuarial loss	—		4		—		8
Total net periodic cost	$	3	$	12	$	6	$	23

The components of net periodic pension benefit and net periodic cost, other than the service cost component, are included in the other noninterest expense caption of the consolidated statements of income. The service cost component is included in the personnel noninterest expense caption of the consolidated statements of income.

The Corporation’s funding policy is to pay at least the minimum amount required by federal law and regulations, with consideration given to the maximum funding amounts allowed. The Corporation regularly reviews the funding of its RAP. There were no contributions during the six months ended June 30, 2026 or 2025.

Note 15 Segment Reporting

The Corporation is managed through operating segments based on our internal structure and management process, which is how we assess performance and allocate resources to the segments. Certain operating segments have been aggregated into our three reportable segments where the nature of the products and services, the type of customer, and the distribution of those products and services are similar. The three reportable segments are Corporate and Commercial Specialty; Community, Consumer, and

46

Business; and Risk Management and Shared Services. A description of the products and services and the related customers for each reportable segment can be found in the Segment Reporting note in the Corporation’s 2025 Annual Report on Form 10-K.

Effective beginning the first quarter of 2026, the Corporation made adjustments to both its FTP and expense allocation of shared services to its reportable segments to better align with how management assesses performance and allocates resources. These changes consisted of updates to the FTP methodology, including revisions to the funding curve and deposit assumptions; reassignment of certain branch locations based on the primary business activities supported by those branches; and revisions to the allocation of shared service expenses. The Corporation has recast prior period segment information to conform to the current period presentation.

The financial information of the Corporation’s segments disclosed below has been compiled utilizing the accounting policies described in the Corporation’s 2025 Annual Report on Form 10-K with certain exceptions based on internal management accounting policies. The significant exceptions are as follows:

The Corporation allocates certain net interest income, the provision for credit losses, certain noninterest expenses, and income taxes to each operating segment. Allocation methodologies are subject to periodic adjustment as the internal management accounting system is revised, the interest rate environment evolves, and business or product lines within the segments change. Also, because the development and application of these methodologies is a dynamic process, the financial results presented may be periodically reviewed.

The Corporation allocates certain net interest income using an internal FTP methodology that charges users of funds (assets, primarily loans) and credits providers of funds (liabilities, primarily deposits) based on the funding curve, maturity, prepayment, and other characteristics of the assets and liabilities. This allocation is reflected as net intersegment interest income (expense) in the accompanying tables.

The provision for credit losses is allocated to segments based on the expected long-term annual net charge off rates attributable to the credit risk of loans managed by the segment during the period. In contrast, the level of the consolidated provision for credit losses is determined based on an ACLL model using methodologies described in the Corporation’s 2025 Annual Report on Form 10-K.

The net effect of the above allocations is recorded within the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's consolidated financial information.

Indirect expenses incurred by the Corporation's centralized support functions - including facilities, information technology, finance, and corporate risk management - are allocated to reportable segments based on actual usage, such as transaction volumes or FTEs, as well as other relevant drivers that reflect consumption of those services. Because these allocations are based on estimated activity levels, individual period results may reflect variability in the distribution of indirect expenses among segments. Certain corporate-level expenses, including acquisition-related costs, integration expenses, and gains or losses on the disposition of branches or business units, are not allocated and remain in the Risk Management and Shared Services segment. These allocations are reflected as allocated indirect expense in the accompanying tables.

Income tax expense (benefit) is allocated to segments based on the Corporation’s estimated effective tax rate, with certain segments adjusted for any tax-exempt income or non-deductible expenses.

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Financial information about the Corporation’s segments is presented below:

	Three Months Ended June 30, 2026
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income	$	267,324	$	86,481	$	16,234	$	370,039
Net intersegment interest (expense) income	(105,641)		136,046		(30,405)		—
Net interest income (expense)	161,683		222,527		(14,171)		370,039
Noninterest income	15,648		56,437		8,313		80,398
Total income (expense) before provision	177,331		278,964		(5,858)		450,437
Provision for credit losses	21,287		6,456		(8,355)		19,388
Total income after provision	156,044		272,508		2,497		431,049
Noninterest expense
Personnel	24,595		65,456		71,117		161,168
Technology(a)	1,293		13,853		17,721		32,867
Occupancy(a)	255		8,405		5,431		14,091
Business development and advertising	1,128		839		6,581		8,548
Equipment(a)	6		2,319		3,098		5,423
Legal and professional	272		1,478		15,704		17,454
Loan and foreclosure costs	233		1,296		23		1,552
FDIC assessment	—		—		10,595		10,595
Other intangible amortization	—		—		6,894		6,894
Other noninterest expense	1,087		10,376		1,827		13,290
Allocated indirect expense (income)	29,531		70,523		(100,054)		—
Total noninterest expense	58,400		174,545		38,937		271,882
Net income (loss) before income taxes	97,644		97,963		(36,440)		159,167
Income tax expense	17,567		20,676		(2,640)		35,603
Net income (loss)	$	80,077	$	77,287	$	(33,800)	$	123,564
Loans	$	21,736,674	$	14,231,238	$	499,128	$	36,467,040
Allocated goodwill	556,343		590,738		—		1,147,081
Total assets	22,552,085		15,452,018		13,808,403		51,812,506

(a) A portion of total depreciation expense of $0.2 million, $6.3 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

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	Three Months Ended June 30, 2025
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income (expense)	$	242,978	$	68,871	$	(11,849)	$	300,000
Net intersegment interest (expense) income	(107,337)		143,478		(36,141)		—
Net interest income (expense)	135,641		212,349		(47,990)		300,000
Noninterest income	11,984		51,481		3,512		66,977
Total income (expense) before provision	147,625		263,830		(44,478)		366,977
Provision for credit losses	20,369		6,363		(8,736)		17,996
Total income (expense) after provision	127,256		257,467		(35,742)		348,981
Noninterest expense
Personnel	20,149		56,641		50,204		126,994
Technology(a)	842		12,903		12,763		26,508
Occupancy(a)	190		7,386		5,068		12,644
Business development and advertising	1,252		968		5,528		7,748
Equipment(a)	6		2,301		2,187		4,494
Legal and professional	221		529		5,924		6,674
Loan and foreclosure costs	261		1,171		1,273		2,705
FDIC assessment	—		—		9,708		9,708
Other intangible amortization	—		—		2,203		2,203
Other noninterest expense	934		8,024		716		9,674
Allocated indirect expense (income)	32,166		63,408		(95,574)		—
Total noninterest expense	56,021		153,331		—		209,352
Net income (loss) before income taxes	71,236		104,137		(35,744)		139,629
Income tax expense (benefit)	13,211		21,869		(6,681)		28,399
Net income (loss)	$	58,025	$	82,268	$	(29,063)	$	111,230
Loans	$	17,617,892	$	12,531,178	$	458,535	$	30,607,605
Allocated goodwill	525,836		579,156		—		1,104,992
Total assets	17,907,721		13,043,969		13,042,039		43,993,729

a) A portion of total depreciation expense of $0.1 million, $5.9 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

49

	Six Months Ended Jun 30, 2026
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income	$	498,429	$	154,917	$	23,882	$	677,228
Net intersegment interest (expense) income	(208,353)		266,076		(57,723)		—
Net interest income (expense)	290,076		420,993		(33,841)		677,228
Noninterest income	29,540		112,380		14,336		156,256
Total income (expense) before provision	319,616		533,373		(19,505)		833,484
Provision for credit losses	41,947		13,391		(24,949)		30,389
Total income after provision	277,669		519,982		5,444		803,095
Noninterest expense
Personnel	48,145		130,410		117,786		296,341
Technology(a)	2,116		27,978		32,509		62,603
Occupancy(a)	473		16,756		10,588		27,817
Business development and advertising	2,097		1,527		12,750		16,374
Equipment(a)	12		4,395		6,626		11,033
Legal and professional	529		2,160		21,487		24,176
Loan and foreclosure costs	721		2,236		302		3,259
FDIC assessment	—		—		19,432		19,432
Other intangible amortization	—		—		9,096		9,096
Other noninterest expense	1,808		18,058		1,048		20,914
Allocated indirect expense (income)	52,230		127,110		(179,340)		—
Total noninterest expense	108,131		330,630		52,284		491,045
Net income (loss) before income taxes	169,538		189,352		(46,840)		312,050
Income tax expense (benefit)	30,825		39,868		(1,843)		68,850
Net income (loss)	$	138,713	$	149,484	$	(44,997)	$	243,200

(a) A portion of total depreciation expense of $0.3 million, $12.5 million, and $11.9 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

50

	Six Months Ended Jun 30, 2025
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income (expense)	$	470,263	$	131,367	$	(15,690)	$	585,940
Net intersegment interest (expense) income	(203,557)		288,856		(85,299)		—
Net interest income (expense)	266,706		420,223		(100,989)		585,940
Noninterest income	24,887		100,560		307		125,754
Total income (expense) before provision	291,593		520,783		(100,682)		711,694
Provision for credit losses	39,382		12,434		(20,817)		30,999
Total income (expense) after provision	252,211		508,349		(79,865)		680,695
Noninterest expense
Personnel	41,475		116,513		92,902		250,890
Technology(a)	1,432		25,947		26,267		53,646
Occupancy(a)	336		15,820		11,869		28,025
Business development and advertising	2,186		1,805		10,143		14,134
Equipment(a)	12		4,331		4,678		9,021
Legal and professional	422		1,343		10,992		12,757
Loan and foreclosure costs	1,071		2,516		1,712		5,299
FDIC assessment	—		—		20,144		20,144
Other intangible amortization	—		—		4,405		4,405
Other noninterest expense	1,714		15,427		4,507		21,648
Allocated indirect expense (income)	63,505		124,114		(187,619)		—
Total noninterest expense	112,155		307,816		—		419,971
Net income (loss) before income taxes	140,056		200,533		(79,865)		260,724
Income tax expense (benefit)	25,997		42,112		(20,301)		47,808
Net income (loss)	$	114,059	$	158,421	$	(59,564)	$	212,916

(a) A portion of total depreciation expense of $0.1 million, $11.8 million, and $14.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and

Risk Management and Shared Services segments, respectively, is included in this expense caption.

Expenses included within the other noninterest expense line of the segment information above relate to the remaining segment expenses including office expense and card issuance costs. None of the individual expense categories rise to the level of significance for the segment; however, they are utilized in determining the profit or loss measure for each segment.

The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to U.S. GAAP. As a result, reportable segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, the information presented is not indicative of how the segments would perform if they operated as independent entities.

The chief operating decision maker for each of the segments is the President and Chief Executive Officer of the Corporation. For the Corporate and Commercial Specialty and Community, Consumer and Business segments, the chief operating decision maker utilizes net interest income, net income and average total loans and deposits in allocating resources for each segment predominantly in the annual budget and forecasting process. The chief operating decision maker considers budget-to-actual variances on a monthly basis for both profit measures when making decisions about allocating capital and personnel to the segments. Based on the reviews of these two segments and other company-wide initiatives, the chief operating decision maker is informed about allocation of resources to the Risk Management and Shared Services segment.

51

Note 16 Accumulated Other Comprehensive Income (Loss)

The following table summarizes the components of accumulated other comprehensive income (loss) at June 30, 2026 and 2025, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):

(in thousands)	Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2025	$	(2,456)	$	12,894	$	(18,003)	$	(7,566)
Other comprehensive loss before reclassifications	(73,377)		—		—		(73,377)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities	3,590		—		—		3,590
Other assets / accrued expenses and other liabilities	—		(14,418)		—		(14,418)
Interest expense	—		(1,343)		—		(1,343)
Personnel expense	—		—		(126)		(126)
Income tax benefit (expense)	17,407		(3,792)		31		13,647
Net other comprehensive loss during period	(52,380)		(19,553)		(95)		(72,027)
Balance June 30, 2026	$	(54,836)	$	(6,659)	$	(18,098)	$	(79,593)
Balance December 31, 2024	$	(48,993)	$	(1,268)	$	(24,154)	$	(74,416)
Other comprehensive income before reclassifications	53,149		—		4,770		57,919
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities	3,986		—		—		3,986
Other assets / accrued expenses and other liabilities	—		8,532		—		8,532
Interest income	—		2,555		—		2,555
Personnel expense	—		—		(126)		(126)
Other expense	—		—		(8)		(8)
Income tax (expense) benefit	(14,251)		2,668		(1,157)		(12,740)
Net other comprehensive income during period	42,884		13,755		3,480		60,119
Balance June 30, 2025	$	(6,109)	$	12,487	$	(20,674)	$	(14,297)

52

(in thousands)	AFS Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive (Loss) Income
Balance March 31, 2026	$	(28,608)	$	2,153	$	(18,050)	$	(44,505)
Other comprehensive loss before reclassifications	(36,846)		—		—		(36,846)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities	1,901		—		—		1,901
Other assets / accrued expenses and other liabilities	—		(6,506)		—		(6,506)
Interest income	—		(597)		—		(597)
Personnel expense	—		—		(63)		(63)
Income tax benefit (expense)	8,717		(1,709)		15		7,023
Net other comprehensive loss during period	(26,228)		(8,812)		(48)		(35,088)
Balance June 30, 2026	$	(54,836)	$	(6,659)	$	(18,098)	$	(79,593)
Balance March 31, 2025	$	(23,655)	$	9,135	$	(20,624)	$	(35,144)
Other comprehensive income before reclassifications	21,317		—		—		21,317
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities	2,059		—		—		2,059
Other assets / accrued expenses and other liabilities	—		1,264		—		1,264
Interest income	—		1,437		—		1,437
Personnel expense	—		—		(63)		(63)
Other expense	—		—		(4)		(4)
Income tax (expense) benefit	(5,830)		650		17		(5,164)
Net other comprehensive income (loss) during period	17,545		3,352		(50)		20,847
Balance June 30, 2025	$	(6,109)	$	12,487	$	(20,674)	$	(14,297)

53

ITEM 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

Special Note Regarding Forward-Looking Statements

This report contains statements that may constitute forward-looking statements within the meaning of the safe-harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, such as statements other than historical facts contained or incorporated by reference into this report. These forward-looking statements include statements with respect to the Corporation’s financial condition, results of operations, plans, objectives, future performance and business, including statements preceded by, followed by or that include the words “believes,” “expects,” or “anticipates,” references to estimates or similar expressions. Future filings by the Corporation with the SEC, and future statements other than historical facts contained in written material, press releases and oral statements issued by, or on behalf of the Corporation may also constitute forward-looking statements.

All forward-looking statements contained in this report or which may be contained in future statements made for or on behalf of the Corporation are based upon information available at the time the statement is made and the Corporation assumes no obligation to update any forward-looking statements, except as required by federal securities law. Forward-looking statements are subject to significant risks and uncertainties, and the Corporation’s actual results may differ materially from the expected results discussed in such forward-looking statements. Factors that might cause actual results to differ from the results discussed in forward-looking statements include, but are not limited to, the risk factors in Item 1A, Risk Factors, in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2025, and as may be described from time to time in the Corporation’s subsequent SEC filings.

Overview

The following discussion and analysis is presented to assist in the understanding and evaluation of the Corporation’s financial condition and results of operations. It is intended to complement the unaudited consolidated financial statements, footnotes, and supplemental financial data appearing elsewhere in this Quarterly Report on Form 10-Q and should be read in conjunction therewith. Management continually evaluates strategic acquisition opportunities and various other strategic alternatives that could involve the sale or acquisition of branches or other assets, or the consolidation or creation of subsidiaries. Within the tables presented, certain columns and rows may not recalculate due to the use of rounded numbers for disclosure purposes.

Performance Summary

•Average loans of $33.6 billion increased $3.3 billion, or 11%, from the first six months of 2025, driven primarily by the American National acquisition and continued organic growth in commercial and business lending portfolio.

•Average deposits of $37.8 billion increased $3.3 billion, or 9%, from the first six months of 2025, primarily due to the American National acquisition, as well as organic growth in noninterest bearing demand, savings and other time deposits, partially offset by a decrease in brokered CDs.

•Net interest income of $677.2 million increased $91.3 million, or 16%, from the first six months of 2025, and net interest margin was 3.10%, compared to 3.01% for the first six months of 2025. The increases in net interest income and net interest margin were driven by the acquisition of American National in the second quarter of 2026 as well as organic growth in commercial and business lending alongside a mix shift in deposits to lower cost products.

•Provision for credit losses was $30.4 million compared to $31.0 million for the first six months of 2025, driven by nominal credit movement coupled with general macroeconomic trends. Provision for credit losses was relatively unchanged from the first six months of 2025, as credit losses associated with acquired seasoned loans were largely reflected through purchase accounting following the adoption of ASU 2025-08.

•Noninterest income of $156.3 million increased $30.5 million, or 24%, from the first six months of 2025, primarily due to higher wealth management fees and capital markets revenue in addition to the absence of a nonrecurring loss on mortgage portfolio sale recognized in the first quarter of 2025 in connection with the completion of balance sheet repositioning announced in the fourth quarter of 2024.

•Noninterest expense of $491.0 million increased $71.1 million, or 17%, from the first six months of 2025, primarily driven by increases in expenses related to the American National acquisition.

54

Table 1 Summary Results of Operations: Trends

	YTD						Quarter ended
(Dollars in thousands, except per share data)	Jun 30, 2026			Jun 30, 2025			Jun 30, 2026			Mar 31, 2026			Dec 31, 2025			Sep 30, 2025			Jun 30, 2025
Net income	$	243,200		$	212,916		$	123,564		$	119,635		$	137,129		$	124,732		$	111,230
Net income available to common equity	237,450			207,166			120,689			116,760			134,254			121,857			108,355
Earnings per common share - basic	1.34			1.25			0.64			0.70			0.81			0.73			0.65
Earnings per common share - diluted	1.33			1.24			0.63			0.70			0.80			0.73			0.65
Dividend payout ratio(a)	35.82		%	36.80		%	37.50		%	34.29		%	29.63		%	31.51%			35.38		%
Book value / share(b)							28.85			29.04			28.81			28.17			27.67
Tangible book value (TBV) / share(b)(c)							22.15			22.23			22.01			21.36			20.84
Performance ratios
Return on average assets(d)	1.02		%	1.00		%	0.97		%	1.08		%	1.23		%	1.12		%	1.03		%
Return on average tangible assets(c)(d)	1.07		%	1.04		%	1.03		%	1.12		%	1.27		%	1.17		%	1.07		%
Return on average equity(d)	9.22		%	9.17		%	8.81		%	9.69		%	11.09		%	10.26		%	9.43		%
Return on average tangible common equity (ROATCE)(c)(d)	12.54		%	12.66		%	12.12		%	13.03		%	15.04		%	14.02		%	12.96		%
Efficiency ratios (expense / revenue)
Fully tax-equivalent efficiency ratio	57.26		%	57.70		%	58.30		%	56.03		%	55.21		%	54.77		%	55.81		%
Adjusted efficiency ratio(c)	54.23		%	57.15		%	52.91		%	55.77		%	55.15		%	54.77		%	55.81		%

(a) Ratio is based upon basic earnings per common share.

(b) Based on period end common shares outstanding.

(c) This is a non-GAAP financial measure. See Table 19 Non-GAAP Measures for a reconciliation to GAAP financial measures.

(d) This ratio is annualized.

55

Income Statement Analysis

Net Interest Income

Table 2 Net Interest Income Analysis

	Six Months Ended Jun 30,
	2026					2025(a)
(Dollars in thousands)	Average Balance		Interest Income / Expense		Average Yield / Rate	Average Balance		Interest Income / Expense		Average Yield / Rate
Assets
Earning assets
Loans(b)(c)
Commercial and industrial	$	12,485,064	$	369,755	5.97%	$	10,783,368	$	349,740	6.54%
Commercial real estate—owner occupied	1,385,167		37,968		5.53%	1,127,535		32,214		5.76%
Commercial and business lending	13,870,231		407,723		5.93%	11,910,904		381,954		6.46%
Commercial real estate—investor	5,893,380		177,285		6.06%	5,499,334		178,658		6.55%
Real estate construction	2,233,900		74,468		6.72%	1,884,065		67,829		7.26%
Commercial real estate lending	8,127,280		251,753		6.24%	7,383,399		246,486		6.73%
Total commercial	21,997,511		659,476		6.04%	19,294,303		628,440		6.57%
Residential mortgage	6,874,603		130,603		3.80%	7,144,851		131,818		3.69%
Auto finance	3,587,435		100,736		5.66%	2,889,190		80,332		5.61%
Home equity	763,919		24,788		6.49%	662,509		24,150		7.29%
Other consumer	365,077		18,892		10.44%	311,691		17,417		11.27%
Total consumer	11,591,034		275,019		4.76%	11,008,241		253,717		4.62%
Total loans	33,588,545		934,495		5.60%	30,302,544		882,157		5.86%
Investments
Taxable securities	7,615,581		164,023		4.31%	6,489,135		140,962		4.34%
Tax-exempt securities(b)	1,975,205		34,763		3.52%	2,010,403		35,264		3.51%
Other short-term investments	1,154,975		26,335		4.60%	878,929		21,921		5.03%
Total investments	10,745,761		225,121		4.19%	9,378,467		198,147		4.23%
Total earning assets and related interest income	44,334,306		$	1,159,616	5.26%	39,681,011		$	1,080,304	5.48%
Other assets, net	3,810,263					3,346,515
Total assets	$	48,144,569				$	43,027,526
Liabilities and stockholders' equity
Interest-bearing liabilities
Interest-bearing deposits
Savings	$	5,791,146	$	37,505	1.31%	$	5,192,835	$	35,068	1.36%
Interest-bearing demand	8,305,614		71,397		1.73%	7,856,593		87,915		2.26%
Money market	6,855,912		80,215		2.36%	6,033,999		78,255		2.62%
Network transaction deposits	1,898,760		34,961		3.71%	1,845,974		40,278		4.40%
Brokered CDs	3,808,685		75,298		3.99%	4,201,955		94,711		4.55%
Other time deposits	4,592,267		79,662		3.50%	3,740,683		70,569		3.80%
Total interest-bearing deposits	31,252,384		379,038		2.45%	28,872,038		406,796		2.84%
Federal funds purchased and securities sold under agreements to repurchase	442,876		7,818		3.56%	297,963		5,626		3.81%
FHLB advances	3,558,141		66,621		3.78%	2,413,352		50,979		4.26%
Senior and subordinated debt	593,292		20,326		6.85%	609,788		21,785		7.15%
Other interest-bearing liabilities	13,835		306		4.46%	24,683		695		5.68%
Total funding	4,608,144		95,071		4.15%	3,345,786		79,085		4.76%
Total interest-bearing liabilities and related interest expense	35,860,528		$	474,109	2.67%	32,217,824		$	485,881	3.04%
Noninterest-bearing demand deposits	6,533,624					5,644,554
Other liabilities	431,445					483,247
Stockholders’ equity	5,318,972					4,681,901
Total liabilities and stockholders’ equity	$	48,144,569				$	43,027,526
Interest rate spread					2.59%					2.44%
Net free funds					0.51%					0.57%
Fully tax-equivalent net interest income and net interest margin			$	685,507	3.10%			$	594,423	3.01%
Fully tax-equivalent adjustment			(8,279)					(8,483)
Net interest income			$	677,228				$	585,940

(a) Prior period has been adjusted to conform with current period presentation.
(b) The yield on tax-exempt loans and securities is computed on a fully tax-equivalent basis using a tax rate of 21%.

(c) Loans held for sale have been included in the average balances.

56

Table 2 Net Interest Income Analysis

	Three Months Ended,
	Jun 30, 2026					Mar 31, 2026					Jun 30, 2025(a)
(Dollars in thousands)	Average Balance		Interest Income / Expense		Average Yield / Rate	Average Balance		Interest Income / Expense		Average Yield / Rate	Average Balance		Interest Income / Expense		Average Yield / Rate
Assets
Earning assets
Loans(b)(c)
Commercial and industrial	$	13,185,643	$	197,248	6.00%	$	11,776,702	$	172,507	5.94%	$	10,981,221	$	179,955	6.57%
Commercial real estate—owner occupied	1,577,489		22,000		5.59%	1,190,708		15,968		5.44%	1,114,054		16,014		5.77%
Commercial and business lending	14,763,132		219,248		5.96%	12,967,410		188,475		5.89%	12,095,274		195,969		6.50%
Commercial real estate—investor	6,502,707		99,131		6.11%	5,277,283		78,154		6.01%	5,582,333		91,569		6.58%
Real estate construction	2,410,500		40,425		6.73%	2,055,338		34,043		6.72%	1,869,708		33,883		7.27%
Commercial real estate lending	8,913,207		139,556		6.28%	7,332,621		112,197		6.21%	7,452,041		125,452		6.75%
Total commercial	23,676,339		358,804		6.08%	20,300,031		300,672		6.01%	19,547,316		321,421		6.59%
Residential mortgage	6,916,754		65,963		3.81%	6,831,984		64,640		3.78%	7,034,607		64,995		3.70%
Auto finance	4,044,290		58,768		5.83%	3,125,504		41,969		5.45%	2,933,161		41,156		5.63%
Home equity	817,378		13,096		6.41%	709,865		11,692		6.60%	667,339		12,098		7.25%
Other consumer	415,476		10,388		10.03%	314,118		8,504		10.98%	309,578		8,644		11.20%
Total consumer	12,193,898		148,215		4.87%	10,981,471		126,805		4.65%	10,944,685		126,893		4.64%
Total loans	35,870,237		507,019		5.67%	31,281,502		427,477		5.53%	30,492,001		448,313		5.89%
Investments
Taxable securities	8,153,435		88,347		4.33%	7,071,751		75,676		4.28%	6,578,690		71,174		4.33%
Tax-exempt securities(b)	1,971,946		17,373		3.52%	1,978,501		17,389		3.52%	2,004,725		17,598		3.51%
Other short-term investments	1,291,636		14,694		4.56%	1,016,795		11,641		4.64%	999,294		12,679		5.09%
Total investments	11,417,017		120,414		4.22%	10,067,047		104,706		4.17%	9,582,709		101,451		4.24%
Total earning assets and related interest income	47,287,254		$	627,433	5.32%	41,348,549		$	532,183	5.20%	40,074,710		$	549,764	5.50%
Other assets, net	3,948,588					3,670,399					3,345,353
Total assets	$	51,235,842				$	45,018,948				$	43,420,063
Liabilities and stockholders' equity
Interest-bearing liabilities
Interest-bearing deposits
Savings	$	6,046,605	$	19,815	1.31%	$	5,532,848	$	17,690	1.30%	$	5,222,869	$	17,139	1.32%
Interest-bearing demand	8,720,180		37,161		1.71%	7,886,442		34,236		1.76%	7,683,402		42,485		2.22%
Money market	7,641,652		45,976		2.41%	6,061,442		34,239		2.29%	5,988,947		38,695		2.59%
Network transaction deposits	1,879,876		17,459		3.73%	1,917,854		17,502		3.70%	1,843,998		20,211		4.40%
Brokered CDs	4,085,995		40,487		3.97%	3,528,294		34,811		4.00%	4,089,844		45,418		4.45%
Other time deposits	4,945,821		42,867		3.48%	4,234,785		36,795		3.52%	3,725,205		33,707		3.63%
Total interest-bearing deposits	33,320,129		203,765		2.45%	29,161,665		175,273		2.44%	28,554,266		197,656		2.78%
Federal funds purchased and securities sold under agreements to repurchase	460,414		4,085		3.56%	425,142		3,732		3.56%	220,872		2,004		3.64%
FHLB advances	3,733,950		35,052		3.77%	3,380,379		31,570		3.79%	3,221,749		34,889		4.34%
Senior and subordinated debt	592,195		10,163		6.86%	594,401		10,163		6.84%	592,399		10,700		7.22%
Other interest-bearing liabilities	16,430		190		4.64%	11,212		116		4.18%	17,844		287		6.45%
Total funding	4,802,989		49,490		4.13%	4,411,134		45,581		4.18%	4,052,863		47,880		4.74%
Total interest-bearing liabilities and related interest expense	38,123,118		$	253,255	2.66%	33,572,799		$	220,854	2.67%	32,607,129		$	245,536	3.02%
Noninterest-bearing demand deposits	7,062,098					5,999,278					5,648,935
Other liabilities	422,642					440,344					431,338
Stockholders’ equity	5,627,984					5,006,527					4,732,661
Total liabilities and stockholders’ equity	$	51,235,842				$	45,018,948				$	43,420,063
Interest rate spread					2.65%					2.53%					2.48%
Net free funds					0.52%					0.50%					0.56%
Fully tax-equivalent net interest income and net interest margin			$	374,178	3.17%			$	311,329	3.03%			$	304,228	3.04%
Fully tax-equivalent adjustment			(4,139)					(4,139)					(4,228)
Net interest income			$	370,039				$	307,190				$	300,000

(a) Prior period has been adjusted to conform with current period presentation.
(b) The yield on tax-exempt loans and securities is computed on a fully tax-equivalent basis using a tax rate of 21%.

(c) Loans held for sale have been included in the average balances.

57

Notable Contributions to the Change in Net Interest Income

•Fully tax-equivalent net interest income and net interest income increased $91.1 million and $91.3 million, or 15% and 16%, as compared to the first six months of 2025, respectively. The average yield on earning assets decreased 22 bp and the cost of interest-bearing liabilities decreased 37 bp from the first six months of 2025. The increase in net interest income was primarily driven by growth in average earning assets resulting from the American National acquisition in the second quarter of 2026. In addition, asset yields benefited from a continued focus to shift the asset mix away from lower-yielding residential mortgages toward higher-yielding commercial loans, while rates paid on interest-bearing liabilities decreased alongside a mix shift in deposits to lower cost products. See sections Interest Rate Risk and Quantitative and Qualitative Disclosures about Market Risk for a discussion of interest rate risk and market risk.

•Average earning assets increased $4.7 billion, or 12%, from the first six months of 2025. Average loans increased $3.3 billion, or 11%, from the first six months of 2025, driven by loans acquired from American National as well as increases in commercial and industrial, auto finance, and real estate construction loans, partially offset by a decrease in residential mortgage loans as a result of the completion of the Corporation's mortgage portfolio sale in the first quarter of 2025 as part of the balance sheet repositioning announced in the fourth quarter of 2024. Average investments increased $1.4 billion, or 15%, from the first six months of 2025 due to the American National acquisition.

•    Average interest-bearing liabilities increased $3.6 billion, or 11%, compared to the first six months of 2025. Average interest-bearing deposits increased $2.4 billion, or 8% from the first six months of 2025. This was primarily driven by the acquisition of American National along with increases in other time deposits and savings, partially offset by a decrease in brokered CDs. Average total funding increased $1.3 billion, or 38%, from the first six months of 2025, primarily driven by an increase in FHLB advances to prepare for and execute the acquisition of American National and fund continued loan growth. Average noninterest-bearing demand deposits increased $889.1 million, or 16%, driven by deposits acquired from the American National acquisition and organic growth from the first six months of 2025.

Provision for Credit Losses

The provision for credit losses is predominantly a function of the Corporation’s reserving methodology and judgments as to other qualitative and quantitative factors used to determine the appropriate level of the ACLL, which focuses on changes in the size and character of the loan portfolio, changes in levels of individually evaluated and other nonaccrual loans, historical losses and delinquencies in each portfolio category, the risk inherent in specific loans, concentrations of loans to specific borrowers or industries, existing economic conditions and economic forecasts, the fair value of underlying collateral, and other factors which could affect potential credit losses. See additional discussion under the sections titled Loans, Credit Risk, Nonperforming Assets, and Allowance for Credit Losses on Loans.

Noninterest Income

Table 3 Noninterest Income

	Six months ended						Three months ended										Changes vs
(Dollars in thousands, except as noted)	Jun 30, 2026		Jun 30, 2025		YTD % Change		Jun 30, 2026		Mar 31, 2026		Dec 31, 2025		Sep 30, 2025		Jun 30, 2025		Mar 31, 2026		Jun 30, 2025
Wealth management fees	$	51,435	$	45,522	13	%	$	26,217	$	25,219	$	25,742	$	25,315	$	23,025	4	%	14	%
Service charges and deposit account fees	29,916		25,961		15	%	15,863		14,054		13,827		13,861		13,147		13	%	21	%
Card-based fees	25,740		21,642		19	%	14,161		11,579		12,679		12,308		11,200		22	%	26	%
Other fee-based revenue	10,623		10,245		4	%	5,758		4,862		5,557		5,414		4,995		18	%	15	%
Capital markets, net	14,018		10,110		39	%	7,476		6,543		11,175		10,764		5,765		14	%	30	%
Mortgage banking, net	8,888		8,035		11	%	2,777		6,111		2,926		3,541		4,213		(55)	%	(34)	%
Loss on mortgage portfolio sale	—		(6,976)		(100)	%	—		—		—		—		—		—	%	—	%
Bank and corporate owned life insurance	8,430		9,339		(10)	%	4,615		3,816		3,804		4,051		4,135		21	%	12	%
Asset gains (losses), net	1,629		(2,613)		N/M		789		840		838		3,340		(1,735)		(6)	%	N/M
Investment securities gains, net	6		11		(45)	%	35		(28)		37		1		7		N/M		N/M
Other	5,571		$	4,477	24	%	2,707		2,861		2,799		2,670		2,226		(5)	%	22	%
Total noninterest income	$	156,256	$	125,754	24	%	$	80,398	$	75,857	$	79,384	$	81,265	$	66,977	6	%	20	%
Assets under management, at market value(a)							17,009		15,708		16,132		16,178		15,537		8	%	9	%

N/M = Not meaningful
(a) In millions. Excludes assets held in brokerage accounts.

58

Notable Contributions to the Change in Noninterest Income

•Wealth management fees increased $5.9 million from the first six months of 2025, primarily due to increased assets under management.

•Service charges and deposit account fees increased $4.0 million from the first six months of 2025, due to an increase in overdraft and business demand deposit account fees.

•Card-based fees increased $4.1 million from the first six months of 2025, primarily due to commercial loan charges and interchange fee income.

•Capital markets, net increased $3.9 million from the first six months of 2025, primarily from increased syndication fees and interest rate swaps.

•Loss on mortgage portfolio sale decreased $7.0 million from the first six months of 2025, due to the balance sheet repositioning completed during the first quarter of 2025.

•Asset gains (losses), net increased $4.2 million from the first six months of 2025, due to changes in deferred compensation, partially offset by losses on leases.

Noninterest Expense

Table 4 Noninterest Expense

	Six months ended								Three months ended															QTD % Change vs
(Dollars in thousands)	Jun 30, 2026			Jun 30, 2025			YTD % Change		Jun 30, 2026			Mar 31, 2026			Dec 31, 2025			Sep 30, 2025			Jun 30, 2025			Mar 31, 2026		Jun 30, 2025
Personnel	$	296,341		$	250,890		18	%	$	161,168		$	135,172		$	135,130		$	135,703		$	126,994		19	%	27	%
Technology	62,603			53,646			17	%	32,867			29,736			28,641			28,590			26,508			11	%	24	%
Occupancy	27,817			28,025			(1)	%	14,091			13,725			14,229			12,757			12,644			3	%	11	%
Business development and advertising	16,374			14,134			16	%	8,548			7,827			9,118			8,362			7,748			9	%	10	%
Equipment	11,033			9,021			22	%	5,423			5,610			6,888			4,368			4,494			(3)	%	21	%
Legal and professional	24,176			12,757			90	%	17,454			6,721			5,945			5,232			6,674			160	%	162	%
Loan and foreclosure costs	3,259			5,299			(38)	%	1,552			1,707			1,327			1,638			2,705			(9)	%	(43)	%
FDIC assessment	19,432			20,144			(4)	%	10,595			8,837			6,589			9,980			9,708			20	%	9	%
Other intangible amortization	9,096			4,405			106	%	6,894			2,203			2,203			2,203			2,203			N/M		N/M
Other	20,914			21,648			(3)	%	13,290			7,625			9,396			7,369			9,674			74	%	37	%
Total noninterest expense	$	491,045		$	419,971		17	%	$	271,882		$	219,163		$	219,466		$	216,202		$	209,352		24	%	30	%
Average FTEs excluding overtime	4,129			3,993			3	%	4,321			3,934			3,919			3,982			3,980			10	%	9	%
Annualized noninterest expense / average assets	2.06		%	1.97		%			2.13		%	1.97		%	1.96		%	1.95		%	1.93		%

Notable Contributions to the Change in Noninterest Expense

•Personnel expense increased $45.5 million from the first six months of 2025, driven by nonrecurring increases in severance and retention bonuses paired with ongoing increased salaries and annual incentive accruals primarily from the American National acquisition, and elevated health care benefit costs.

•Technology expense increased $9.0 million from the first six months of 2025, driven by an increase in subscription costs.

•Business development and advertising increased $2.2 million from the first six months of 2025, driven by marketing and advertising activities.

•Legal and professional expense increased $11.4 million from the first six months of 2025, primarily due to nonrecurring expenses related to the American National acquisition.

•Loan and foreclosure costs decreased $2.0 million from the first six months of 2025, due to recoveries on foreclosure costs due to sales of OREO properties in the first half of 2026.

•Other intangible amortization increased $4.4 million from the first six months of 2025, due to additional amortization related to core deposit intangibles recognized as part of the American National acquisition.

59

Income Taxes

The Corporation records income tax expense during interim periods based on the best estimate of the full year's effective tax rate as adjusted for discrete items, if any, taken into account in the relevant interim period. Each quarter, the Corporation updates its estimate of the annual effective tax rate and the effect of any change in the estimated rate is recorded on a cumulative basis. The Corporation recognized income tax expense of $68.9 million for the six months ended June 30, 2026, compared to income tax expense of $47.8 million for the six months ended June 30, 2025. The Corporation's effective tax rate from continuing operations was 22.06% and 18.34% for the six months ended June 30, 2026, and 2025, respectively. The increase in income tax expense of $21.0 million and higher effective tax rate during the first six months of 2026 as compared to the same period of 2025 were primarily due to the net impact of several discrete items from 2025 that resulted in the release of a portion of the valuation allowance, which did not reoccur in 2026. Additionally, the Corporation recognized higher net income before tax for the six months ended June 30, 2026, which reduced the relative impact of any recurring favorable rate drivers.

Income tax expense recorded on the consolidated statements of income involves the interpretation and application of certain accounting pronouncements and federal and state tax laws and regulations.

The Corporation is subject to examination by various taxing authorities. Examination by taxing authorities may impact the amount of tax expense and/or the reserve for uncertainty in income taxes if their interpretations differ from those of management, based on their judgments about information available to them at the time of their examinations.

60

Balance Sheet Analysis

•At June 30, 2026, total assets were $51.8 billion, up $6.6 billion, or 15%, from December 31, 2025.

◦Cash and due from banks were $548.1 million at June 30, 2026, down $26.6 million, or 5%, from December 31, 2025. Interest bearing deposits in other financial institutions were $1.3 billion at June 30, 2026, up $124.3 million, or 11%, from December 31, 2025. See the Consolidated Statements of Cash Flows for detailed information on those fluctuations.

◦Available for sale investment securities were $6.4 billion at June 30, 2026, up $969.0 million or 18%, from December 31, 2025. Changes were primarily driven by the acquisition, sale, and reinvestment of the proceeds of the investment securities from the American National acquisition. See Note 3 Business Combinations and Note 6 Investment Securities of the notes to consolidated financial statements for additional detail.

◦Regulatory stocks of $329.4 million at June 30, 2026 were up $76.9 million, or 30%, from December 31, 2025 due to increases in FHLB advances in preparation for and execution of the the American National acquisition requiring additional purchases of FHLB stock.

◦Loans of $36.5 billion at June 30, 2026 were up $5.3 billion, or 17%, from December 31, 2025 primarily due to the American National acquisition and continued organic growth in the commercial and industrial loan portfolio. See Note 3 Business Combinations and Note 7 Loans of the notes to consolidated financial statements and Table 5 Period End Loan Composition below for additional detail.

◦Premise and equipment of $449.0 million at June 30, 2026, up $67.4 million, or 18% from December 31, 2025, primarily due to the American National acquisition. See Note 3 Business Combinations of the notes to consolidated financial statements for additional detail.

•At June 30, 2026, total liabilities were $46.2 billion, up $5.9 billion, or 15%, from December 31, 2025.

◦Total deposits of $39.9 billion at June 30, 2026 were up $4.4 billion or 12%, from December 31, 2025. The increase was primarily due to deposits assumed from the American National acquisition. See Note 3 Business Combinations of the notes to consolidated financial statements for additional detail.

◦Federal funds purchased and securities sold under agreements to repurchase was $529.3 million at June 30, 2026, up $221.4 million, or 72%, from December 31, 2025. FHLB advances of $4.6 billion at June 30, 2026 were up $1.3 billion, or 40%, from December 31, 2025. These increases were driven by the Corporation's need for additional funding to fund the loan growth in the first half of 2026 as well as execution of the American National acquisition. See Note 9 Short and Long-Term Funding of the notes to consolidated financial statements for additional details.

•At June 30, 2026, the loans to deposits ratio was 91.32%, up from 87.65% at December 31, 2025.

•At June 30, 2026, total stockholders' equity was $5.6 billion, up $662.8 million, or 13%, from December 31, 2025 primarily due to the issuance of additional shares of the Corporation's common stock in connection with the acquisition of American National.

61

Loans

Table 5 Period End Loan Composition

	Jun 30, 2026				Mar 31, 2026				Dec 31, 2025				Sep 30, 2025				Jun 30, 2025
(Dollars in thousands)	Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total
Commercial and industrial	$	13,750,175	38	%	$	12,339,597	39	%	$	11,799,757	38	%	$	11,567,651	37	%	$	11,281,964	37	%
Commercial real estate — owner occupied	1,575,445		4	%	1,193,778		4	%	1,186,324		4	%	1,149,939		4	%	1,101,501		4	%
Commercial and business lending	15,325,620		42	%	13,533,375		43	%	12,986,081		42	%	12,717,590		41	%	12,383,465		40	%
Commercial real estate — investor	6,492,950		18	%	5,266,584		16	%	5,246,030		17	%	5,369,441		17	%	5,370,422		18	%
Real estate construction	2,546,186		7	%	2,117,479		7	%	1,994,642		6	%	1,958,766		6	%	1,950,267		6	%
Commercial real estate lending	9,039,136		25	%	7,384,063		23	%	7,240,672		23	%	7,328,207		24	%	7,320,689		24	%
Total commercial	24,364,756		67	%	20,917,438		66	%	20,226,753		65	%	20,045,797		65	%	19,704,154		64	%
Residential mortgage	6,808,398		19	%	6,727,734		21	%	6,793,957		22	%	6,858,285		22	%	6,949,387		23	%
Auto finance	4,044,416		11	%	3,136,334		10	%	3,106,498		10	%	3,041,644		10	%	2,969,495		10	%
Home equity	826,343		2	%	706,075		2	%	713,271		2	%	698,112		2	%	676,208		2	%
Other consumer	423,127		1	%	310,583		1	%	323,135		1	%	308,126		1	%	308,361		1	%
Total consumer	12,102,284		33	%	10,880,726		34	%	10,936,861		35	%	10,906,167		35	%	10,903,451		36	%
Total loans	$	36,467,040	100	%	$	31,798,164	100	%	$	31,163,614	100	%	$	30,951,964	100	%	$	30,607,605	100	%

The Corporation has long-term guidelines relative to the proportion of Commercial and Business, CRE, and Consumer loans within the overall loan portfolio. Furthermore, certain sub-asset classes within the respective portfolios are further defined and dollar limitations are placed on these sub-portfolios. These guidelines and limits are reviewed quarterly and approved annually by the ERC. These guidelines and limits are designed to create balance and diversification within the loan portfolios.

62

The Corporation’s loan distribution and interest rate sensitivity as of June 30, 2026 are summarized in the following table:

Table 6 Loan Distribution and Interest Rate Sensitivity

(Dollars in thousands)	Within 1 Year(a)		1-5 Years		5-15 Years		Over 15 Years		Total		% of Total
Fixed rate
Commercial and industrial	$	4,840,849	$	1,396,539	$	342,031	$	35	$	6,579,454	18	%
Commercial real estate — owner occupied	160,187		397,749		125,816		6,931		690,683		2	%
Commercial and business lending	5,001,036		1,794,288		467,847		6,966		7,270,137		20	%
Commercial real estate — investor	697,252		654,378		94,312		5,232		1,451,174		4	%
Real estate construction	410,812		113,475		10,903		6,935		542,125		1	%
Commercial real estate lending	1,108,064		767,853		105,215		12,167		1,993,299		5	%
Total commercial	6,109,100		2,562,141		573,062		19,133		9,263,436		25	%
Residential mortgage	22,691		74,371		302,290		3,953,549		4,352,901		12	%
Auto finance	22,074		2,310,151		1,712,191		—		4,044,416		11	%
Home equity	1,099		6,308		23,844		6,995		38,246		—	%
Other consumer	7,684		75,135		61,436		4,315		148,570		—	%
Total consumer	53,548		2,465,965		2,099,761		3,964,859		8,584,133		23	%
Total fixed rate loans	$	6,162,648	$	5,028,106	$	2,672,823	$	3,983,992	$	17,847,569	48	%
Floating or adjustable rate
Commercial and industrial	$	7,046,167	$	114,620	$	972	$	8,962	$	7,170,721	20	%
Commercial real estate — owner occupied	789,238		94,747		777		—		884,762		2	%
Commercial and business lending	7,835,405		209,367		1,749		8,962		8,055,483		22	%
Commercial real estate — investor	4,786,443		250,962		3,759		612		5,041,776		14	%
Real estate construction	1,981,142		22,919		—		—		2,004,061		6	%
Commercial real estate lending	6,767,585		273,881		3,759		612		7,045,837		20	%
Total commercial	14,602,990		483,248		5,508		9,574		15,101,320		42	%
Residential mortgage	221,237		1,035,531		1,198,674		55		2,455,497		7	%
Home equity	754,144		33,600		316		37		788,097		2	%
Other consumer	274,557		—		—		—		274,557		1	%
Total consumer	1,249,938		1,069,131		1,198,990		92		3,518,151		10	%
Total floating or adjustable rate loans	$	15,852,928	$	1,552,379	$	1,204,498	$	9,666	$	18,619,471	52	%
Total loans	$	22,015,576	$	6,580,485	$	3,877,321	$	3,993,658	$	36,467,040	100	%

(a) Demand loans, past due loans, overdrafts, and credit cards are reported in the “Within 1 Year” category.

At June 30, 2026, $24.8 billion, or 68%, of the loans outstanding and $21.2 billion, or 87%, of the commercial loans outstanding were floating rate, adjustable rate, re-pricing within one year, or maturing within one year.

Credit Risk

An active credit risk management process is used for commercial loans to ensure that sound and consistent credit decisions are made. Credit risk is controlled by detailed underwriting procedures, comprehensive loan administration, and periodic review of borrowers’ outstanding loans and commitments. Borrower relationships are formally reviewed and graded on an ongoing basis for early identification of potential problems. Further analysis by customer, industry, and geographic location is performed to monitor trends, financial performance, and concentrations. See Note 7 Loans of the notes to consolidated financial statements for additional information on managing overall credit quality.

The loan portfolio is widely diversified by types of borrowers, industry groups, and market areas primarily within the Corporation's lending footprint. Significant loan concentrations are considered to exist when there are amounts loaned to numerous borrowers engaged in similar activities that would cause them to be similarly impacted by economic or other conditions. At June 30, 2026, no significant concentrations existed in the Corporation’s portfolio in excess of 10% of total loan exposure.

Commercial and business lending: The commercial and business lending classification primarily includes commercial loans to large corporations, middle market companies, small businesses, and asset-based lending and equipment financing.

63

Table 7 Largest Commercial and Industrial Industry Group Exposures, by NAICS Subsector

Jun 30, 2026	NAICS Subsector	Outstanding Balance		Total Exposure		% of Total Loan Exposure
(Dollars in thousands)
Utilities(a)	221	$	3,253,512	$	4,249,681	9	%
Real Estate(b)	531	2,616,999		4,137,227		8	%
Credit Intermediation and Related Activities(c)	522	1,039,948		1,583,471		3	%
Merchant Wholesalers, Durable Goods	423	737,268		1,213,733		2	%

(a) 72% of the total utilities exposure comes from renewable energy sources (wind, solar, hydroelectric, and geothermal).

(b) 63% of the total real estate exposure comes from REIT lines.

(c) 71% of credit intermediation and related activities exposure comes from mortgage warehouse lines.

The remaining commercial and industrial portfolio is spread over a diverse range of industries, none of which exceed 2% of total loan exposure.

The CRE-owner occupied portfolio is spread over a diverse range of industries, none of which exceed 2% of total loan exposure.

The credit risk related to commercial and business lending is largely influenced by general economic conditions and the resulting impact on a borrower’s operations or on the value of underlying collateral, if any.

Commercial real estate - investor: Commercial real estate - investor is comprised of loans secured by various non-owner occupied or investor income producing property types.

Table 8 Largest Commercial Real Estate - Investor Property Type Exposures

Jun 30, 2026	% of Total Loan Exposure		% of Total Commercial Real Estate - Investor Loan Exposure
Multi-Family	5	%	37	%
Industrial	3	%	24	%
Office	2	%	16	%

The remaining commercial real estate - investor portfolio is spread over various other property types, none of which exceed 2% of total loan exposure.

Credit risk is managed in a similar manner to commercial and business lending by employing sound underwriting guidelines, lending primarily to borrowers in local markets and businesses, periodically evaluating the underlying collateral, and formally reviewing the borrower’s financial soundness and relationship on an ongoing basis.

Real estate construction: Real estate construction loans are primarily short-term or interim loans that provide financing for the acquisition or development of commercial income properties, multi-family projects, or residential development, both single family and condominium. Real estate construction loans are made to developers and project managers who are generally well known to the Corporation and have prior successful project experience. The credit risk associated with real estate construction loans is generally confined to specific geographic areas but is also influenced by general economic conditions. The Corporation controls the credit risk on these types of loans by making loans in familiar markets to developers, reviewing the merits of individual projects, controlling loan structure, and monitoring project progress and construction advances.

Table 9 Largest Real Estate Construction Property Type Exposures

Jun 30, 2026	% of Total Loan Exposure		% of Total Real Estate Construction Loan Exposure
Multi-Family	5	%	50	%

The remaining real estate construction portfolio is spread over various other property types, none of which exceed 2% of total loan exposure.

The Corporation’s current lending standards for CRE and real estate construction lending are determined by property type and specifically address many criteria, including: maximum loan amounts, maximum LTV, requirements for pre-leasing and/or presales, minimum borrower equity, and maximum loan-to-cost. Currently, the maximum standard for LTV is 80%, with lower limits established for certain higher risk types, such as raw land that has a 50% LTV maximum. Certain loans acquired through business combinations may not adhere to these underwriting standards. The Corporation’s LTV guidelines are in compliance with regulatory supervisory limits. In most cases, for real estate construction loans, the loan amounts include interest reserves, which are built into the loans and sized to fund loan payments through construction and lease up and/or sell out.

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Residential mortgages: Residential mortgage loans are primarily first-lien home mortgages with a maximum loan-to-collateral value without credit enhancement (e.g. private mortgage insurance) of 80%. The residential mortgage portfolio is focused primarily in the Corporation's six-state branch footprint, with approximately 94% of the outstanding loan balances in the Corporation's branch footprint at June 30, 2026. The rates on adjustable rate mortgages adjust based upon the movement in the underlying index which is then added to a margin and rounded to the nearest 0.125%. That result is then subjected to any periodic caps to produce the borrower's interest rate for the coming term. Adjustable rate mortgages are typically offered with an initial fixed rate term of 5, 7 or 10 years.

The Corporation generally retains certain fixed-rate residential real estate mortgages in its loan portfolio, including retail and private banking jumbo mortgages and CRA-related mortgages. As part of management’s historical practice of originating and servicing residential mortgage loans, generally the Corporation’s 30-year, agency conforming, fixed-rate residential real estate mortgage loans have been sold in the secondary market with servicing rights retained. Subject to management’s analysis of the current interest rate environment, among other market factors, the Corporation may choose to retain mortgage loan production on its balance sheet.

The Corporation’s underwriting and risk-based pricing guidelines for residential mortgage loans include minimum borrower FICO score and maximum LTV of the property securing the loan. Residential mortgage products generally are underwritten using FHLMC and FNMA secondary marketing guidelines.

Home equity: Home equity consists of both home equity lines of credit and closed-end home equity loans. The Corporation’s credit risk monitoring guidelines for home equity are based on an ongoing review of loan delinquency status, as well as a quarterly review of FICO score deterioration and property devaluation. The Corporation does not routinely obtain appraisals on performing loans to update LTV ratios after origination; however, the Corporation monitors the local housing markets by reviewing the various home price indices and incorporates the impact of the changing market conditions in its ongoing credit monitoring process. For junior lien home equity loans, the Corporation is unable to track the performance of the first lien loan if it does not own or service the first lien loan. However, the Corporation obtains a refreshed FICO score on a quarterly basis and monitors this as part of its assessment of the home equity portfolio.

The Corporation’s underwriting and risk-based pricing guidelines for home equity lines of credit and loans consist of a combination of both borrower FICO score and the original cumulative LTV against the property securing the loan. Currently, the Corporation's policy sets the maximum acceptable LTV at 90%. Certain loans acquired through business combinations may not adhere to these underwriting standards. The Corporation's current home equity line of credit offering is priced based on floating rate indices and generally allows 10 years of interest-only payments followed by a 20-year amortization of the outstanding balance. The loans in the Corporation's portfolio generally have an original term of 20 years with principal and interest payments required.

Indirect Auto: The Corporation currently purchases retail auto sales contracts via a network of approved auto dealerships across 22 states throughout the Northeast, Mid-Atlantic, Midwest, and Great Plains regions of the United States. The auto dealerships finance the sale of automobiles as the initial lender and then assign the contracts to the Corporation pursuant to dealer agreements. The Corporation’s underwriting and pricing guidelines are based on a dual risk grade derived from a combination of FICO auto score and proprietary internal custom score. Minimum grade and FICO score standards ensure the credit risk is appropriately managed to the Corporation’s risk appetite. Further, the grade influences loan-specific parameters such as vehicle age, term, LTV, loan amount, mileage, payment and debt service thresholds, and pricing. Maximum loan terms offered are 84 months on select grades with vehicle age, mileage, and other limitations in place to qualify. The program is designed to capture primarily prime and super prime contracts.

Other consumer: Other consumer consists of credit cards, recreational vehicles, revolving credit plans, and student loans. Credit risk for other consumer loans is influenced by general economic conditions, the characteristics of individual borrowers, and the nature of the loan collateral. Risks of loss are generally on smaller average balances per loan spread over many borrowers. Once charged off, there is usually less opportunity for recovery of these smaller consumer loans. Credit risk is primarily controlled by reviewing the creditworthiness of the borrowers, monitoring payment histories, and taking appropriate collateral and guarantee positions.

Nonperforming Assets

Management is committed to a proactive nonaccrual and problem loan identification philosophy. This philosophy is implemented through the ongoing monitoring and review of all pools of risk in the loan portfolio to ensure that problem loans are identified quickly and the risk of loss is minimized. Table 10 provides detailed information regarding NPAs, which include nonaccrual loans, OREO, and repossessed assets, and also includes information on accruing loans past due and restructured loans:

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Table 10 Nonperforming Assets

(Dollars in thousands)	Jun 30, 2026			Mar 31, 2026			Dec 31, 2025			Sep 30, 2025			Jun 30, 2025
Nonperforming assets
Commercial and industrial	$	44,388		$	19,606		$	7,178		$	12,802		$	6,945
Commercial real estate — owner occupied	3,255			34			203			203			—
Commercial and business lending	47,643			19,640			7,381			13,006			6,945
Commercial real estate — investor	11,184			8,078			8,311			7,333			15,805
Real estate construction	2,974			25			144			145			146
Commercial real estate lending	14,158			8,103			8,455			7,478			15,950
Total commercial	61,801			27,743			15,836			20,484			22,895
Residential mortgage	70,335			66,890			68,492			69,093			73,817
Auto finance	10,973			8,888			8,271			8,218			8,004
Home equity	6,582			6,950			7,774			8,299			8,201
Other consumer	262			110			55			85			82
Total consumer	88,152			82,838			84,592			85,696			90,104
Total nonaccrual loans	149,953			110,581			100,428			106,179			112,999
Commercial real estate owned	28,856			25,530			25,530			27,203			31,629
Residential real estate owned	2,690			3,692			2,414			1,816			1,687
Bank properties real estate owned(a)	2,506			3,312			72			249			972
OREO	34,052			32,534			28,016			29,268			34,287
Repossessed assets	1,293			806			757			789			882
Total nonperforming assets	$	185,298		$	143,921		$	129,201		$	136,236		$	148,169
Accruing loans past due 90 days or more
Commercial	$	565		$	385		$	370		$	395		$	12,123
Consumer(b)	1,723			2,105			2,444			2,297			2,038
Total accruing loans past due 90 days or more	$	2,288		$	2,490		$	2,814		$	2,692		$	14,160
Restructured loans (accruing)
Commercial	$	367		$	461		$	458		$	458		$	431
Consumer	5,888			5,849			5,584			4,280			3,630
Total restructured loans (accruing)	$	6,255		$	6,310		$	6,042		$	4,738		$	4,061
Nonaccrual restructured loans (included in nonaccrual loans)	$	5,068		$	4,424		$	3,472		$	3,899		$	3,704
Ratios
Nonaccrual loans to total loans	0.41		%	0.35		%	0.32		%	0.34		%	0.37		%
NPAs to total loans plus OREO and repossessed assets	0.51		%	0.45		%	0.41		%	0.44		%	0.48		%
NPAs to total assets	0.36		%	0.32		%	0.29		%	0.31		%	0.34		%
Allowance for credit losses on loans to nonaccrual loans	329.75		%	384.36		%	417.56		%	390.49		%	364.42		%
Accruing loans 30-89 days past due
Commercial and industrial	$	10,668		$	24,253		$	2,683		$	1,071		$	2,593
Commercial real estate — owner occupied	893			345			34			—			5,628
Commercial and business lending	11,561			24,598			2,717			1,071			8,221
Commercial real estate — investor	3,089			33,487			19,405			14,190			1,042
Real estate construction	1,437			—			117			21			90
Commercial real estate lending	4,526			33,487			19,522			14,211			1,132
Total commercial	16,087			58,085			22,239			15,282			9,353
Residential mortgage	14,034			7,755			13,135			12,684			8,744
Auto finance	20,367			14,549			16,445			14,013			13,149
Home equity	4,536			2,742			3,779			4,265			4,338
Other consumer(b)	2,988			2,173			2,704			2,728			2,578
Total consumer	41,925			27,219			36,063			33,689			28,810
Total accruing loans 30-89 days past due	$	58,012		$	85,304		$	58,302		$	48,971		$	38,163

(a) Primarily closed branches and other bank operated real estate facilities, pending disposition.

(b) Excluding guaranteed student loans.

Nonaccrual loans: Nonaccrual loans are considered to be one indicator of potential future loan losses. See Note 7 Loans of the notes to consolidated financial statements for additional nonaccrual loan disclosures. See also sections Credit Risk and Allowance for Credit Losses on Loans.

OREO: Management actively seeks to ensure OREO properties held are monitored to minimize the Corporation’s risk of loss.

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Accruing loans past due 90 days or more: Loans past due 90 days or more but still accruing interest are classified as such where the underlying loans are both well-secured (the collateral value is sufficient to cover principal and accrued interest) and are in the process of collection.

Restructured loans: Loans are considered restructured loans if concessions have been granted to borrowers that are experiencing financial difficulty. See also Note 7 Loans of the notes to consolidated financial statements for additional restructured loans disclosures.

Allowance for Credit Losses on Loans

Credit risks within the loan portfolio are inherently different for each loan type. Credit risk is controlled and monitored through the use of lending standards, a thorough review of potential borrowers, and ongoing review of loan payment performance. Active asset quality administration, including early problem loan identification and timely resolution of problems, aids in the management of credit risk and the minimization of loan losses. Credit risk management for each loan type is discussed in the section entitled Credit Risk. See Note 7 Loans of the notes to consolidated financial statements for additional disclosures on the ACLL.

To assess the appropriateness of the ACLL, the Corporation focuses on the evaluation of many factors, including but not limited to: evaluation of facts and issues related to specific loans, management’s ongoing review and grading of the loan portfolio, credit report refreshes, consideration of historical loan loss and delinquency experience on each portfolio category, trends in past due and nonaccrual loans, the risk characteristics of the various classifications of loan segments, changes in the size and character of the loan portfolio, concentrations of loans to specific borrowers or industries, existing economic conditions and economic forecasts, the fair value of underlying collateral, funding assumptions on lines, and other qualitative and quantitative factors which could affect potential credit losses. The forecast the Corporation used for June 30, 2026 was the Moody's baseline scenario from May 2026, which was reviewed against the June 2026 baseline scenario with no material updates made, over a two year reasonable and supportable period with straight-line reversion to historical losses over the second year of the period. Assessing these factors involves significant judgment. Because each of the criteria used is subject to change, the ACLL is not necessarily indicative of the trend of future credit losses on loans in any particular segment. Therefore, management considers the ACLL a critical accounting estimate, see section Critical Accounting Estimates in the Corporation's 2025 Annual Report on Form 10-K for additional information on the ACLL. See section Nonperforming Assets for a detailed discussion on asset quality. See also Note 7 Loans of the notes to consolidated financial statements for additional ACLL disclosures. Table 5 provides information on loan growth and period end loan composition, Table 10 provides additional information regarding NPAs, and Table 11 and Table 12 provide additional information regarding activity in the ACLL.

The loan segmentation used in calculating the ACLL at June 30, 2026 and December 31, 2025 was generally comparable. The methodology to calculate the ACLL consists of the following components: a valuation allowance estimate is established for commercial and consumer loans determined by the Corporation to be individually evaluated, using discounted cash flows, estimated fair value of underlying collateral, and/or other data available. Loans are segmented for criticized loan pools by loan type as well as for non-criticized loan pools by loan type, primarily based on risk rating rates after considering loan type, historical loss and delinquency experience, credit quality, and industry classifications. Loans that have been criticized are considered to have a higher risk of default than non-criticized loans, as circumstances were present to support the lower loan grade, warranting higher loss factors. Additionally, management allocates ACLL to absorb losses that may not be provided for by the other components due to qualitative factors evaluated by management, such as limitations within the credit risk grading process, known current economic or business conditions that may not yet show in trends, industry or other concentrations with current issues that impose higher inherent risks than are reflected in the loss factors, and other relevant considerations. The total allowance is available to absorb losses from any segment of the loan portfolio.

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Table 11 Allowance for Credit Losses on Loans

	YTD				Quarter Ended
(Dollars in thousands)	Jun 30, 2026		Jun 30, 2025		Jun 30, 2026			Mar 31, 2026			Dec 31, 2025			Sep 30, 2025			Jun 30, 2025
Allowance for loan losses
Balance at beginning of period	$	378,068	$	363,545	$	385,756		$	378,068		$	378,341		$	376,515		$	371,348
Provision for loan losses recorded at acquisition	397		—		397			—			—			—			—
Initial allowance for PCD loans	39,512		—		39,512			—			—			—			—
Initial allowance for PSL	28,263		—		28,263			—			—			—			—
Provision for loan losses	26,000		34,500		13,000			13,000			2,000			15,000			18,000
Charge offs	(34,492)		(32,062)		(26,282)			(8,210)			(7,636)			(15,254)			(18,348)
Recoveries	5,981		10,531		3,083			2,898			5,363			2,081			5,515
Net charge offs	(28,511)		(21,531)		(23,199)			(5,312)			(2,273)			(13,173)			(12,833)
Balance at end of period	$	443,729	$	376,515	$	443,729		$	385,756		$	378,068		$	378,341		$	376,515
Allowance for unfunded commitments
Balance at beginning of period	$	41,276	$	38,776	$	39,276		$	41,276		$	36,276		$	35,276		$	35,276
Initial allowance for PCD unfunded commitments	3,597		—		3,597			—			—			—			—
Initial allowance for purchased seasoned unfunded commitments	1,871		—		1,871			—			—			—			—
Provision for unfunded commitments	4,000		(3,500)		6,000			(2,000)			5,000			1,000			—
Balance at end of period	$	50,744	$	35,276	$	50,744		$	39,276		$	41,276		$	36,276		$	35,276
Allowance for credit losses on loans	$	494,473	$	411,791	$	494,473		$	425,032		$	419,344		$	414,618		$	411,791
Provision for credit losses on loans	30,397		31,000		19,397			11,000			7,000			16,000			18,000
Net (charge offs) recoveries
Commercial and industrial	$	(20,340)	$	(6,552)	$	(17,604)		$	(2,736)		$	1,524		$	(1,230)		$	(1,826)
Commercial real estate — owner occupied	—		—		—			—			(113)			—			—
Commercial and business lending	(20,340)		(6,552)		(17,604)			(2,736)			1,411			(1,230)			(1,826)
Commercial real estate — investor	(2,210)		(9,385)		(2,710)			500			94			(8,930)			(8,493)
Real estate construction	4		150		2			2			2			2			121
Commercial real estate lending	(2,206)		(9,235)		(2,708)			502			96			(8,928)			(8,372)
Total commercial	(22,546)		(15,787)		(20,312)			(2,234)			1,507			(10,158)			(10,198)
Residential mortgage	(49)		(105)		(197)			148			(197)			(231)			(302)
Auto finance	(3,351)		(2,208)		(1,508)			(1,843)			(2,010)			(1,505)			(689)
Home equity	690		526		251			439			2			56			237
Other consumer	(3,255)		(3,957)		(1,433)			(1,822)			(1,575)			(1,336)			(1,881)
Total consumer	(5,965)		(5,744)		(2,887)			(3,078)			(3,780)			(3,015)			(2,636)
Total net charge offs	$	(28,511)	$	(21,531)	$	(23,199)		$	(5,312)		$	(2,273)		$	(13,173)		$	(12,833)
Ratios
Allowance for credit losses on loans to total loans					1.36		%	1.34		%	1.35		%	1.34		%	1.35		%
Allowance for credit losses on loans to net charge offs (annualized)	8.6x		9.5x		5.3x			19.7x			46.5x			7.9x			8.0x
Loan evaluation method for ACLL
Individually evaluated for impairment					$	18,624		$	19,919		$	2,992		$	4,518		$	—
Collectively evaluated for impairment					475,849			405,113			416,352			410,100			411,791
Total ACLL					$	494,473		$	425,032		$	419,344		$	414,618		$	411,791
Loan balance
Individually evaluated for impairment					$	65,645		$	59,321		$	21,651		$	19,282		$	21,431
Collectively evaluated for impairment					36,401,395			31,738,843			31,141,963			30,932,683			30,586,174
Total loan balance					$	36,467,040		$	31,798,164		$	31,163,614		$	30,951,964		$	30,607,605

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Table 12 Annualized Net (Charge Offs) Recoveries to Average Loans

	YTD		Quarter Ended
(In basis points)	Jun 30, 2026	Jun 30, 2025	Jun 30, 2026	Mar 31, 2026	Dec 31, 2025	Sep 30, 2025	Jun 30, 2025
Net (charge offs) recoveries
Commercial and industrial	(33)	(12)	(54)	(9)	5	(4)	(7)
Commercial real estate — owner occupied	—	—	—	—	(4)	—	—
Commercial and business lending	(30)	(11)	(48)	(9)	4	(4)	(6)
Commercial real estate — investor	(8)	(34)	(17)	4	1	(67)	(61)
Real estate construction	—	2	—	—	—	—	3
Commercial real estate lending	(5)	(25)	(12)	3	1	(49)	(45)
Total commercial	(21)	(16)	(34)	(4)	3	(20)	(21)
Residential mortgage	—	—	(1)	1	(1)	(1)	(2)
Auto finance	(19)	(15)	(15)	(24)	(26)	(20)	(9)
Home equity	18	16	12	25	—	3	14
Other consumer	(180)	(256)	(138)	(235)	(200)	(173)	(244)
Total consumer	(10)	(11)	(9)	(11)	(14)	(11)	(10)
Total net charge offs	(17)	(14)	(26)	(7)	(3)	(17)	(17)

Notable Contributions to the Change in the Allowance for Credit Losses on Loans

•Total nonaccrual loans increased $49.5 million, or 49%, from December 31, 2025, and increased $37.0 million, or 33%, from June 30, 2025. The increase from December 31, 2025 was primarily driven by an organic increase in commercial and industrial and auto finance lending, partially offset by decreases in home equity and residential mortgage lending. Additionally, nonaccrual loans acquired from American National contributed to the increase. The increase from June 30, 2025 was primarily driven by nonaccrual loans acquired from American National. There were also organic increases in commercial and industrial and auto finance lending, partially offset by decreases in CRE - investor, residential mortgage, and home equity lending. See Note 7 Loans of the notes to consolidated financial statements and Table 10 for additional disclosures on the changes in asset quality.

•YTD net charge offs increased $7.0 million from June 30, 2025, primarily driven by net charge offs of loans acquired from American National. See Table 11 and Table 12 for additional information on the activity in the ACLL.

Management believes the level of ACLL to be appropriate at June 30, 2026.

Deposits and Customer Funding

The following table summarizes the composition of our deposits and customer funding:

Table 13 Period End Deposit and Customer Funding Composition

	Jun 30, 2026				Mar 31, 2026				Dec 31, 2025				Sep 30, 2025				Jun 30, 2025
(Dollars in thousands)	Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total
Noninterest-bearing demand	$	6,908,338	17	%	$	6,125,067	17	%	$	6,126,632	17	%	$	5,906,251	17	%	$	5,782,487	17	%
Savings	6,171,614		15	%	5,660,641		16	%	5,471,870		15	%	5,380,574		15	%	5,291,674		15	%
Interest-bearing demand	8,697,879		22	%	7,964,665		22	%	7,823,362		22	%	7,791,861		22	%	7,490,772		22	%
Money market	7,614,164		19	%	6,188,045		17	%	6,139,438		17	%	5,785,871		17	%	5,915,867		17	%
Network transaction deposits	1,823,130		5	%	1,746,518		5	%	2,154,995		6	%	2,013,964		6	%	1,792,362		5	%
Brokered CDs	3,933,787		10	%	3,562,752		10	%	3,795,133		11	%	3,956,517		11	%	4,072,048		12	%
Other time deposits	4,782,343		12	%	4,484,077		13	%	4,041,178		11	%	4,046,815		12	%	3,802,356		11	%
Total deposits	$	39,931,255	100	%	$	35,731,765	100	%	$	35,552,608	100	%	$	34,881,853	100	%	$	34,147,565	100	%
Other customer funding(a)	55,371				42,372				47,794				64,570				75,440
Total deposits and other customer funding	$	39,986,626			$	35,774,137			$	35,600,402			$	34,946,423			$	34,223,005
Less: Total network transaction deposits and brokered CDs	5,756,917				5,309,270				5,950,128				5,970,481				5,864,410
Core customer deposits(b) and other customer funding	$	34,229,709			$	30,464,867			$	29,650,274			$	28,975,941			$	28,358,595
Time deposits of more than $250,000	1,073,890				956,299				834,309				832,718				775,107

(a) Includes repurchase agreements.

(b) This is a non-GAAP financial measure. See Table 19 Non-GAAP Measures for a reconciliation to GAAP financial measures.

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•Total deposits, which are the Corporation's largest source of funds, increased $4.4 billion, or 12% from December 31, 2025, and increased $5.8 billion, or 17%, from June 30, 2025. The increases from December 31, 2025 and June 30, 2025, were driven by the American National acquisition causing increases in all deposit categories, except network transaction deposits and brokered CD's, respectively.

•Estimated uninsured and uncollateralized deposits, excluding intercompany deposits, were 26.5% of total deposits at both June 30, 2026 and December 31, 2025, while it was 24.8% at June 30, 2025.

Liquidity

The objective of liquidity risk management is to ensure that the Corporation has the ability to generate sufficient cash or cash equivalents in a timely and cost-effective manner to satisfy the cash flow requirements of depositors and borrowers and to meet its other commitments as they become due. The Corporation’s liquidity risk management process is designed to identify, measure, and manage the Corporation’s funding and liquidity risk to meet its daily funding needs in the ordinary course of business, as well as to address expected and unexpected changes in its funding requirements. The Corporation engages in various activities to manage its liquidity risk, including diversifying its funding sources, stress testing, and holding readily-marketable assets which can be used as a source of liquidity, if needed.

The Corporation performs dynamic scenario analysis in accordance with industry best practices. Measures have been established to ensure the Corporation has sufficient high quality short-term liquidity to meet cash flow requirements under stressed scenarios. In addition, the Corporation also reviews static measures such as deposit funding as a percent of total assets and liquid asset levels. Strong capital ratios, credit quality, and core earnings are also essential to maintaining cost effective access to wholesale funding markets. At June 30, 2026, the Corporation was in compliance with its internal liquidity objectives and had sufficient asset-based liquidity to meet its obligations even under a stressed scenario.

The Corporation maintains diverse and readily available liquidity sources, including:

•Lines of credit with the Federal Reserve Bank and FHLB, which require eligible loan and investment collateral to be pledged. Based on the amount of collateral pledged, the FHLB established a collateral value from which the Bank may draw advances, and issue letters of credit in favor of public fund depositors, against the collateral. As of June 30, 2026, the Bank had $5.3 billion available for future funding. The Federal Reserve Bank also establishes a collateral value of assets to support borrowings from the discount window. As of June 30, 2026, the Bank had $6.4 billion available for discount window borrowings.

•Issuances by the Parent Company; the Corporation maintains on file with the SEC a universal shelf registration statement, under which the Parent Company may offer the following securities, either separately or in units: debt securities, preferred stock, depositary shares, common stock, and warrants.

•Bank issuances; the Bank may also issue institutional CDs, network transaction deposits, and brokered CDs.

•Global Bank Note Program issuances; the Bank has implemented a program pursuant to which it may offer up to $2.0 billion aggregate principal amount of its unsecured senior and subordinated notes.

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The following table presents secured and total available liquidity sources, estimated uninsured and uncollateralized deposits (excluding intercompany deposits), and coverage of estimated uninsured and uncollateralized deposits.

Table 14 Liquidity Sources and Uninsured Deposit Coverage Ratio

(Dollars in thousands)	Jun 30, 2026			Mar 31, 2026			Dec 31, 2025			Sep 30, 2025			Jun 30, 2025
Federal Reserve Bank balance	$	1,265,738		$	915,691		$	1,139,401		$	799,991		$	735,876
Available FHLB Chicago capacity	5,330,837			5,574,246			6,221,495			5,943,747			5,026,154
Available Federal Reserve Bank discount window capacity	6,387,365			6,506,759			6,443,766			5,725,892			5,441,186
Funding available within one business day(a)	12,983,940			12,996,696			13,804,662			12,469,630			11,203,216
Available federal funds lines	1,967,000			1,981,000			1,846,000			1,419,000			1,729,000
Available brokered deposits capacity(b)	2,014,958			1,529,791			823,055			697,898			734,649
Unsecured debt capacity(c)	1,000,000			1,000,000			1,000,000			1,000,000			1,000,000
Total available liquidity	$	17,965,898		$	17,507,487		$	17,473,717		$	15,586,528		$	14,666,865
Uninsured and uncollateralized deposits	$	10,590,229		$	9,178,436		$	9,432,066		$	8,697,563		$	8,469,167
Coverage ratio of uninsured and uncollateralized deposits with secured funding available within one business day	123		%	142		%	146		%	143		%	132		%
Coverage ratio of uninsured and uncollateralized deposits with total funding	170		%	191		%	185		%	179		%	173		%

(a) Estimated based on normal course of operations with indicated institution.

(b) Availability based on internal policy limitations. The Corporation includes outstanding deposits that have received a primary purpose exemption in the brokered deposit classification as they have similar funding characteristics and risk as brokered deposits.

(c) Estimated availability based on the Corporation's current internal funding considerations.

Based on contractual obligations and ongoing operations, the Corporation's sources of liquidity are sufficient to meet present and future liquidity needs. See Table 17 for information about the Corporation's contractual obligations and other commitments. See section Deposits and Customer Funding for information about uninsured deposits and concentrations.

Credit ratings impact the Corporation's ability to issue debt securities and the cost to borrow money. Adverse changes in credit ratings impact not only the ability to raise funds in the capital markets but also the cost of these funds. For additional information regarding risks related to adverse changes in our credit ratings, see Part I, Item 1A, Risk Factors in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2025.

For the six months ended June 30, 2026, net cash provided by operating and financing activities was $343.0 million and $1.2 billion, respectively, while investing activities used net cash of $1.4 billion, for a net increase in cash and cash equivalents of $110.6 million since year-end 2025. At June 30, 2026, assets of $51.8 billion increased $6.6 billion, or 15%, from year-end 2025. On the funding side, deposits of $39.9 billion increased $4.4 billion, or 12% from year-end 2025, short-term funding increased $221.4 million, or 72%, and FHLB advances increased $1.3 billion or 40%.

For the six months ended June 30, 2025, net cash provided by operating and financing activities was $239.6 million and $765.5 million, respectively, while investing activities used net cash of $764.6 million, for a net increase in cash and cash equivalents of $240.5 million since year-end 2024. At June 30, 2025, assets of $44.0 billion increased $970.7 million, or 2%, from year-end 2024. On the funding side, deposits of $34.1 billion decreased $500.9 million, or 1%, from year-end 2024, short-term funding decreased $394.8 million, or 84%, and FHLB advances increased $2.0 billion, or 109%.

Quantitative and Qualitative Disclosures about Market Risk

Market risk and interest rate risk are managed centrally. Market risk is the potential for loss arising from adverse changes in the fair value of fixed-income securities, equity securities, other earning assets, and derivative financial instruments as a result of changes in interest rates or other factors. Interest rate risk is the potential for reduced net interest income resulting from adverse changes in the level of interest rates. As a financial institution that engages in transactions involving an array of financial products, the Corporation is exposed to both market risk and interest rate risk. In addition to market risk, interest rate risk is measured and managed through a number of methods. The Corporation uses financial modeling simulation techniques that measure the sensitivity of future earnings due to changing rate environments to measure interest rate risk.

Policies established by the Corporation’s ALCO and approved by the Board of Directors are intended to limit these risks. The Board has delegated day-to-day responsibility for managing market and interest rate risk to ALCO. The primary objectives of market risk management are to minimize any adverse effect that changes in market risk factors may have on net interest income and to offset the risk of price changes for certain assets recorded at fair value.

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Interest Rate Risk

The primary goal of interest rate risk management is to control exposure to interest rate risk within policy limits approved by the Board of Directors. These limits and guidelines reflect the Corporation's risk appetite for interest rate risk over both short-term and long-term horizons.

The major sources of the Corporation's non-trading interest rate risk are timing differences in the maturity and re-pricing characteristics of assets and liabilities, changes in the shape of the yield curve, and the potential exercise of explicit or embedded options. We measure these risks and their impact by identifying and quantifying exposures through the use of sophisticated simulation and valuation models which are employed by management to understand interest rate sensitive EAR and MVE at risk. The Corporation’s interest rate risk profile is such that, generally, a higher yield curve adds to income while a lower yield curve has a negative impact on earnings. The Corporation's EAR profile is asset sensitive at June 30, 2026.

For further discussion of the Corporation's interest rate risk and corresponding key assumptions, see the Interest Rate Risk section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included in the Corporation’s 2025 Annual Report on Form 10-K.

The sensitivity analysis included below is measured as a percentage change in EAR due to gradual moves in benchmark interest rates from a baseline scenario over 12 months. We evaluate the sensitivity using: 1) a dynamic forecast incorporating expected growth in the balance sheet, and 2) a static forecast where the current balance sheet is held constant.

While a gradual shift in interest rates was used in this analysis to provide an estimate of exposure under a probable scenario, an instantaneous shift in interest rates would have a more significant impact. No EAR breaches occurred during the first six months of 2026.

Table 15 Estimated % Change in Rate Sensitive Earnings at Risk Over 12 Months

	Jun 30, 2026				Dec 31, 2025
	Dynamic Forecast		Static Forecast		Dynamic Forecast		Static Forecast
Gradual Rate Change
100 bp increase in interest rates	1.9	%	1.8	%	1.5	%	2.0	%
200 bp increase in interest rates	3.7	%	3.4	%	2.8	%	3.9	%
100 bp decrease in interest rates	(1.2)	%	(1.0)	%	(0.8)	%	(1.4)	%
200 bp decrease in interest rates	(2.6)	%	(2.4)	%	(2.2)	%	(3.4)	%

At June 30, 2026, the MVE profile indicates a decrease in net balance sheet value due to instantaneous upward changes in rates and an increase in net balance sheet value due to instantaneous downward changes in rates.

Table 16 Market Value of Equity Sensitivity

	Jun 30, 2026		Dec 31, 2025
Instantaneous Rate Change
100 bp increase in interest rates	(4.8)	%	(5.2)	%
200 bp increase in interest rates	(10.6)	%	(11.8)	%
100 bp decrease in interest rates	2.5	%	2.3	%
200 bp decrease in interest rates	2.2	%	1.4	%

Since MVE measures the discounted present value of cash flows over the estimated lives of instruments, the change in MVE does not directly correlate to the degree that earnings would be impacted over a shorter time horizon (i.e., the current year). Further, MVE does not take into account factors such as future balance sheet growth, changes in product mix, changes in yield curve relationships, and changes in product spreads that could mitigate the adverse impact of changes in interest rates.

The above EAR and MVE measures do not include all actions that management may undertake to manage this risk in response to anticipated changes in interest rates.

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Contractual Obligations, Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities

The following table summarizes significant contractual obligations and other commitments at June 30, 2026, at those amounts contractually due to the recipient, including any unamortized premiums or discounts, hedge basis adjustments, or other similar carrying value adjustments.

Table 17 Contractual Obligations and Other Commitments

(in thousands)	One Year or Less		One to Three Years		Three to Five Years		Over Five Years		Total
Time deposits	$	8,500,693	$	195,624	$	19,761	$	52	$	8,716,130
Federal funds purchased and securities sold under agreements to repurchase	529,276		—		—		—		529,276
FHLB advances	4,368,275		204,249		2,157		—		4,574,681
Senior and subordinated debt	—		—		298,547		292,533		591,080
Operating leases	5,853		10,098		7,342		16,544		39,837
Total	$	13,404,097	$	409,971	$	327,807	$	309,129	$	14,451,004

The Corporation also has obligations under its derivatives, lending-related commitments, and retirement plans as described in Note 10 Derivative and Hedging Activities, Note 12 Commitments, Off-Balance Sheet Arrangements, and Legal Proceedings, and Note 14 Retirement Plans of the notes to consolidated financial statements, respectively. Further discussion of the nature of federal funds purchased and securities sold under agreements to repurchase, FHLB advances, and senior and subordinated debt is included in Note 9 Short and Long-Term Funding of the notes to consolidated financial statements.

Capital

Management actively reviews capital strategies for the Corporation and each of its subsidiaries in light of perceived business risks, future growth opportunities, industry standards, and compliance with regulatory requirements. The assessment of overall capital adequacy depends on a variety of factors, including asset quality, liquidity, stability of earnings, changing competitive forces, economic conditions in markets served, and strength of management. At June 30, 2026, the capital ratios of the Corporation and its banking subsidiaries were in excess of regulatory minimum requirements. The Corporation’s capital ratios are summarized in the following table.

Compliance with regulatory minimum capital requirements is a tool used in assessing the Corporation's capital adequacy, but not determinative of how the Corporation would fare under extreme stress. Factors that may affect the adequacy of the Corporation's capital include the inherent limitations of fair value estimates and the assumptions thereof, the inherent limitations of the regulatory risk-weights assigned to various asset types, the inherent limitations of accounting classifications of certain investments and the effect on their measurement, external macroeconomic conditions and their effects on capital and the Corporation's ability to raise capital or refinance capital commitments, and the extent of steps taken by state or federal government authorities in periods of extreme stress.

For additional information regarding the potential for additional regulation and supervision, see Part I, Item 1A, Risk Factors in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2025.

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Table 18 Capital Ratios

	YTD				Quarter Ended
(Dollars in thousands)	Jun 30, 2026		Jun 30, 2025		Jun 30, 2026			Mar 31, 2026			Dec 31, 2025			Sep 30, 2025			Jun 30, 2025
Risk-based capital(a)
CET1(b)					$	4,304,915		$	3,744,610		$	3,683,711		$	3,584,712		$	3,493,316
Tier 1 capital					4,499,027			3,938,722			3,877,823			3,778,824			3,687,428
Total capital					5,259,164			4,657,925			4,593,079			4,488,957			4,394,367
Total risk-weighted assets					41,108,330			35,773,810			35,125,680			34,688,358			34,241,408
CET1 capital ratio(b)					10.47		%	10.47		%	10.49		%	10.33		%	10.20		%
Tier 1 capital ratio					10.94		%	11.01		%	11.04		%	10.89		%	10.77		%
Total capital ratio					12.79		%	13.02		%	13.08		%	12.94		%	12.83		%
Tier 1 leverage ratio					8.99		%	8.98		%	8.96		%	8.81		%	8.72		%
Selected equity and performance ratios
Total stockholders’ equity / total assets					10.88		%	10.96		%	11.01		%	10.95		%	10.87		%
Average stockholders' equity / average assets	11.05	%	10.88	%	10.98		%	11.12		%	11.05		%	10.95		%	10.90		%
Tangible common equity / tangible assets (TCE Ratio)(c)					8.27		%	8.27		%	8.29		%	8.18		%	8.06		%

(a) The Federal Reserve establishes regulatory capital requirements, including well-capitalized standards, for the Corporation. The regulatory capital requirements effective for the Corporation follow Basel III, subject to certain transition provisions.

(b) The Corporation is not classified as an advanced approaches holding company as defined by the Federal Reserve. As such, the Corporation has elected to be subject to the AOCI-related adjustments when calculating CET1 capital which allows the Corporation to opt-out of the requirement to include most components of AOCI in CET1 capital.

(c) This is a non-GAAP financial measure. See Table 19 Non-GAAP Measures for a reconciliation to GAAP financial measures.

See Part II, Item 2, Unregistered Sales of Equity Securities and Use of Proceeds, for information on the shares repurchased during the second quarter of 2026.

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Non-GAAP Measures

Table 19 Non-GAAP Measures

	YTD				Quarter Ended
(Dollars in thousands)	Jun 30, 2026		Jun 30, 2025		Jun 30, 2026		Mar 31, 2026		Dec 31, 2025		Sep 30, 2025		Jun 30, 2025
Tangible common equity reconciliation
Common equity					$	5,444,011	$	4,803,760	$	4,781,235	$	4,674,186	$	4,586,669
Less: Goodwill and other intangible assets, net					1,264,034		1,125,639		1,127,842		1,130,044		1,132,247
Tangible common equity for TBV / share and TCE Ratio					$	4,179,977	$	3,678,121	$	3,653,393	$	3,544,142	$	3,454,422
Tangible assets reconciliation
Total assets					$	51,812,506	$	45,593,740	$	45,202,596	$	44,455,863	$	43,993,729
Less: Goodwill and other intangible assets, net					1,264,034		1,125,639		1,127,842		1,130,044		1,132,247
Tangible assets for TCE Ratio					$	50,548,472	$	44,468,101	$	44,074,754	$	43,325,819	$	42,861,482
Average tangible common equity reconciliation
Average common equity	$	5,124,860	$	4,487,789	$	5,433,872	$	4,812,415	$	4,713,445	$	4,627,038	$	4,538,549
Less: Average goodwill and other intangible assets, net	1,197,702		1,134,600		1,267,876		1,126,748		1,129,055		1,131,385		1,133,627
Average tangible common equity for ROATCE	$	3,927,158	$	3,353,189	$	4,165,996	$	3,685,667	$	3,584,390	$	3,495,653	$	3,404,922
Average tangible assets reconciliation
Average total assets	$	48,144,569	$	43,027,526	$	51,235,842	$	45,018,948	$	44,402,771	$	44,015,203	$	43,420,063
Less: Average goodwill and other intangible assets, net	1,197,702		1,134,600		1,267,876		1,126,748		1,129,055		1,131,385		1,133,627
Average tangible assets for return on average tangible assets	$	46,946,867	$	41,892,926	$	49,967,966	$	43,892,200	$	43,273,716	$	42,883,818	$	42,286,436
Adjusted net income reconciliation
Net income	$	243,200	$	212,916	$	123,564	$	119,635	$	137,129	$	124,732	$	111,230
Other intangible amortization, net of tax	6,822		3,304		5,170		1,652		1,652		1,652		1,652
Adjusted net income for return on average tangible assets	$	250,022	$	216,220	$	128,734	$	121,287	$	138,781	$	126,384	$	112,882
Adjusted net income available to common equity reconciliation
Net income available to common equity	$	237,450	$	207,166	$	120,689	$	116,760	$	134,254	$	121,857	$	108,355
Other intangible amortization, net of tax	6,822		3,304		5,170		1,652		1,652		1,652		1,652
Adjusted net income available to common equity for ROATCE	$	244,272	$	210,470	$	125,859	$	118,412	$	135,906	$	123,509	$	110,007
Period end core customer deposits reconciliation
Total deposits					$	39,931,255	$	35,731,765	$	35,552,608	$	34,881,853	$	34,147,565
Less: Network transaction deposits					1,823,130		1,746,518		2,154,995		2,013,964		1,792,362
Less: Brokered CDs					3,933,787		3,562,752		3,795,133		3,956,517		4,072,048
Core customer deposits					$	34,174,338	$	30,422,495	$	29,602,480	$	28,911,371	$	28,283,155
Average core customer deposits reconciliation
Average total deposits	$	37,786,008	$	34,516,592	$	40,382,227	$	35,160,943	$	35,628,917	$	34,705,887	$	34,203,201
Less: Average network transaction deposits	1,898,760		1,845,974		1,879,876		1,917,854		2,090,587		1,933,659		1,843,998
Less: Average brokered CDs	3,808,685		4,201,955		4,085,995		3,528,294		3,998,012		3,916,329		4,089,844
Average core customer deposits	$	32,078,563	$	28,468,663	$	34,416,356	$	29,714,795	$	29,540,318	$	28,855,899	$	28,269,359
Total expense for efficiency ratios reconciliation
Noninterest expense	$	491,045	$	419,971	$	271,882	$	219,163	$	219,466	$	216,202	$	209,352
Less: Other intangible amortization	9,096		4,405		6,894		2,203		2,203		2,203		2,203
Total expense for fully tax-equivalent efficiency ratio	481,949		415,566		264,988		216,960		217,263		213,999		207,149
Less: Acquisition costs(a)	25,476		—		24,469		1,007		252		—		—
Total expense for adjusted efficiency ratio	$	456,473	$	415,566	$	240,519	$	215,953	$	217,011	$	213,999	$	207,149
Total revenue for efficiency ratios reconciliation
Net interest income	$	677,228	$	585,940	$	370,039	$	307,190	$	309,981	$	305,222	$	300,000
Noninterest income	156,256		125,754		80,398		75,857		79,384		81,265		66,977
Less: Investment securities (losses) gains, net	6		11		35		(28)		37		1		7
Fully tax-equivalent adjustment	8,279		8,483		4,139		4,139		4,196		4,222		4,228
Total revenue for fully tax-equivalent efficiency ratio	841,757		720,166		454,541		387,214		393,524		390,708		371,198
Less: Announced initiatives(b)	—		(6,976)		—		—		—		—		—
Total revenue for adjusted efficiency ratio	$	841,757	$	727,142	$	454,541	$	387,214	$	393,524	$	390,708	$	371,198

(a) During the fourth quarter of 2025, the Corporation entered into a definitive agreement to acquire American National. The acquisition was completed on April 1, 2026. These costs, incurred in connection with the acquisition, represent nonrecurring costs.

(b) Announced initiatives include the loss on mortgage portfolio sale as a result of balance sheet repositioning that the Corporation announced in the fourth quarter of 2024.

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Sequential Quarter Results

The Corporation reported net income of $123.6 million for the second quarter of 2026, compared to a net income of $119.6 million for the first quarter of 2026. Net income available to common equity was $120.7 million for the second quarter of 2026, or $0.64 and $0.63 for basic and diluted earnings per common share, respectively. Comparatively, the net income available to common equity for the first quarter of 2026 was $116.8 million, or $0.70 for both basic and diluted earnings per common share.

Fully tax-equivalent net interest income for the second quarter of 2026 was $374.2 million, $62.8 million, or 20%, higher than the first quarter of 2026. The increase in net interest income was driven by growth in average earning assets resulting from the American National acquisition, along with an improved interest rate spread. The net interest margin in the second quarter of 2026 and first quarter of 2026 were 3.17% and 3.03%, respectively.

Average earning assets increased $5.9 billion, or 14%, to $47.3 billion in the second quarter of 2026. Driven by the acquisition of American National's loan portfolio and continued organic growth in commercial and industrial lending, average loans increased $4.6 billion, or 15%. On the funding side, average total interest-bearing deposits increased $4.2 billion, or 14%, primarily driven by the acquisition of American National along with organic increases in all deposit types except for network transaction deposits and money market.

The provision for credit losses was $19.4 million for the second quarter of 2026 and $11.0 million for the first quarter of 2026. This was due to an increase in our allowance for unfunded commitments; and general macroeconomic trends. See discussion under sections: Provision for Credit Losses, Nonperforming Assets, and Allowance for Credit Losses on Loans.

Noninterest income for the second quarter of 2026 was $80.4 million, up $4.5 million, or 6% from the first quarter of 2026. This is due to an increase in income from card-based fees and service charges and deposit account fees, partially offset by a decrease in mortgage banking income.

Noninterest expense for the second quarter of 2026 was $271.9 million, up $52.7 million, or 24% from the first quarter of 2026. This was primarily driven by increases in expenses related to the American National acquisition.

For the second quarter of 2026, the Corporation recognized income tax expense of $35.6 million, compared to an income tax expense of $33.2 million for the first quarter of 2026. The increase in expense from the first quarter of 2026 was primarily attributable to an increase in net income from the American National acquisition.

Comparable Quarter Results

The Corporation reported net income of $123.6 million for the second quarter of 2026, compared to net income of $111.2 million for the second quarter of 2025. Net income available to common equity was $120.7 million for the second quarter of 2026, or $0.64 and $0.63 for basic and diluted earnings per common share, respectively. Comparatively, net income available to common equity for the second quarter of 2025 was $108.4 million, or $0.65 for both basic and diluted earnings per common share.

Fully tax-equivalent net interest income for the second quarter of 2026 was $374.2 million, $70.0 million, or 23%, higher than the second quarter of 2025. The net interest margin between the comparable quarters was up 13 bp, to 3.17% in the second quarter of 2026 from the second quarter of 2025. The increase in net interest income was primarily driven by growth in average earning assets resulting from the American National acquisition, along with an improved interest rate spread.

Average earning assets increased $7.2 billion, or 18%, to $47.3 billion in the second quarter of 2026. Average loans increased $5.4 billion, or 18% and average investments increased $1.8 billion, or 19%, primarily due to the American National transaction and continued organic growth in commercial and industrial lending. On the funding side, average interest-bearing deposits increased $4.8 billion, or 17%, from the second quarter of 2025, primarily due to the American National acquisition. Average short and long-term funding increased $750.1 million, or 19%, primarily due to increases in federal funds purchased and securities sold under repurchase agreements and short term FHLB advances driven by the Corporation's need for additional funding to continue to fund the loan growth as well as execution of the American National acquisition.

The provision for credit losses was $19.4 million for the second quarter of 2026, compared to a provision of $18.0 million for the second quarter of 2025. This was due to loan growth, continued nominal credit movement in the portfolio, and general macroeconomic conditions. See discussion under sections: Provision for Credit Losses, Nonperforming Assets, and Allowance for Credit Losses on Loans.

Noninterest income for the second quarter of 2026 was $80.4 million, up $13.4 million, or 20%, compared to the second quarter of 2025. This is due to an increase in income from wealth management fees, card-based fees, and service charges and deposit account fees, and partially offset by a decrease in mortgage banking income.

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Noninterest expense for the second quarter of 2026 was $271.9 million, up $62.5 million, or 30%, from the second quarter of 2025, driven by nonrecurring expenses related to the American National transaction and increases in personnel expense related to increases in annual incentive accruals and health care costs and technology costs.

The Corporation recognized income tax expense of $35.6 million for the second quarter of 2026, compared to income tax expense of $28.4 million for the second quarter of 2025. The increase was due the net effect of several discrete items with favorable tax rate impacts in the second quarter of 2025 that did not reoccur, as well as an increase in net income in the second quarter of 2026.

Segment Review

The reportable segments are Corporate and Commercial Specialty; Community, Consumer and Business; and Risk Management and Shared Services. The financial information of the Corporation’s segments was compiled utilizing the accounting policies described in the Corporation’s 2025 Annual Report on Form 10-K and Note 15 Segment Reporting of the notes to consolidated financial statements.

Table 20 Selected Segment Financial Data

	Three Months Ended Jun 30,					Six Months Ended Jun 30,
(Dollars in thousands)	2026		2025		% Change	2026		2025		% Change
Corporate and Commercial Specialty
Total revenue	$	177,331	$	147,625	20%	$	319,616	$	291,593	10%
Provision for credit losses	21,287		20,369		5%	41,947		39,382		7%
Noninterest expense	58,400		56,021		4%	108,131		112,155		(4)%
Income tax expense	17,567		13,211		33%	30,825		25,997		19%
Net income	80,077		58,025		38%	138,713		114,059		22%
Average earning assets	21,167,443		17,501,224		21%	19,689,554		17,253,366		14%
Average loans	21,160,951		17,483,645		21%	19,680,150		17,241,671		14%
Average deposits	8,907,099		6,921,336		29%	7,928,845		7,082,223		12%
Community, Consumer, and Business
Total revenue	$	278,964	$	263,830	6%	$	533,373	$	520,783	2%
Provision for credit losses	6,456		6,363		1%	13,391		12,434		8%
Noninterest expense	174,545		153,331		14%	330,630		307,816		7%
Income tax expense	20,676		21,869		(5)%	39,868		42,112		(5)%
Net income	77,287		82,268		(6)%	149,484		158,421		(6)%
Average earning assets	14,263,119		12,533,452		14%	13,478,556		12,591,669		7%
Average loans	14,259,708		12,530,041		14%	13,475,145		12,588,258		7%
Average deposits	24,622,409		21,185,516		16%	23,409,579		21,239,541		10%
Risk Management and Shared Services
Total net revenue	$	(5,858)	$	(44,478)	(87)%	$	(19,505)	$	(100,682)	(81)%
Provision for credit losses	(8,355)		(8,736)		(4)%	(24,949)		(20,817)		20%
Noninterest expense	38,937		—		N/M	52,284		—		N/M
Income tax benefit	(2,640)		(6,681)		(60)%	(1,843)		(20,301)		(91)%
Net loss	(33,800)		(29,063)		16%	(44,997)		(59,564)		(24)%
Average earning assets	11,856,692		10,040,034		18%	11,166,195		9,835,976		14%
Average loans	449,578		478,315		(6)%	433,250		472,615		(8)%
Average deposits	6,852,719		6,096,349		12%	6,447,584		6,194,828		4%

N/M = Not meaningful

Notable Changes in Segment Financial Data

Corporate and Commercial Specialty

•Net income increased $24.7 million from the six months ended June 30, 2025, attributable to growth in commercial and business lending as well as the inclusion of operating results from the recent acquisition of American National.

•Average earning assets and average loans increased $2.4 billion and compared to the six months ended June 30, 2025, primarily driven by the acquisition of American National and continued organic growth in commercial and industrial lending.

77

•Average deposits increased $846.6 million from the six months ended June 30, 2025 due to increases in all major deposit types primarily through the acquisition of American National.

Community, Consumer, and Business

•Average earning assets and average loans both increased by $886.9 million from the six months ended June 30, 2025, driven by the acquisition of American National loans with the majority being auto finance loans.

•Average deposits increased $2.2 billion from the six months ended June 30, 2025, driven by increases in all deposit types through the acquisition of American National and organic core customer deposit growth.

Risk Management and Shared Services

•Total net revenue increased $81.2 million from the six months ended June 30, 2025, due to an increase in direct interest income due to the increased AFS securities acquired from American National and additional FTP expense being allocated to the other segments based on their related funding mixes.

•Average earning assets increased $1.3 billion from the six months ended June 30, 2025, due to an increase to the Corporation's the investment portfolio following the American National acquisition.

Critical Accounting Estimates

In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. The determination of the ACLL is particularly susceptible to significant change. A discussion of these estimates can be found in the Critical Accounting Estimates section in Management's Discussion and Analysis of Financial Condition and Results of Operations included in the Corporation’s 2025 Annual Report on Form 10-K. There have been no changes in the Corporation's application of critical accounting estimates since December 31, 2025.

Recent Developments

On July 28, 2026, the Corporation’s Board of Directors declared a regular quarterly cash dividend of $0.24 per common share, payable on September 15, 2026, to shareholders of record at the close of business on September 1, 2026.

The Board of Directors also declared a regular quarterly cash dividend of $0.3671875 per depositary share on Associated's 5.875% Perpetual Preferred Stock, Series E, payable on September 15, 2026 to the shareholders of record at the close of business on September 1, 2026.

The Board of Directors also declared a regular quarterly cash dividend of $0.3515625 per depositary share on Associated's 5.625% Perpetual Preferred Stock, Series F, payable on September 15, 2026 to the shareholders of record at the close of business on September 1, 2026.

ITEM 3.     Quantitative and Qualitative Disclosures About Market Risk

Information required by this item is set forth in Item 2 under the captions Quantitative and Qualitative Disclosures about Market Risk and Interest Rate Risk.

78

ITEM 4.     Controls and Procedures

The Corporation maintains disclosure controls and procedures as required under Rule 13a-15 promulgated under the Securities Exchange Act that are designed to ensure that information required to be disclosed in the Corporation's Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to the Corporation’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

As of June 30, 2026, the Corporation’s management carried out an evaluation, under the supervision and with the participation of the Corporation’s Chief Executive Officer and Chief Financial Officer, of the effectiveness of its disclosure controls and procedures. Based on the foregoing, its Chief Executive Officer and Chief Financial Officer concluded that the Corporation’s disclosure controls and procedures were effective as of June 30, 2026.

On April 1, 2026, the Corporation completed its acquisition of American National. The Corporation is in the process of integrating the acquired operations, business processes and systems into its overall internal control environment and has begun to extend its oversight and monitoring activities to include the acquired operations. Management's evaluation of internal control over financial reporting as of June 30, 2026 did not include an assessment of the internal controls over financial reporting of American National. The Corporation expects to continue evaluating and integrating American National into the Corporation's internal control environment in connection with the planned conversion of systems and operations.

Other than the integration activities associated with the American National acquisition, there were no changes were made to the Corporation’s internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) during the last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Corporation’s internal control over financial reporting.

79

PART II - OTHER INFORMATION

ITEM 1. Legal Proceedings

The information required by this item is set forth in Part I, Item 1 under Note 12 Commitments, Off-Balance Sheet Arrangements, and Legal Proceedings of the notes to consolidated financial statements.

ITEM 1A. Risk Factors

There have been no material changes in the Risk Factors described in the Corporation’s 2025 Annual Report on Form 10-K.

ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds

During the second quarter of 2026, the Corporation repurchased $0.7 million of common stock, all of which were related to tax withholding on equity compensation. The repurchase details are presented in the table below:

Common Stock Purchases

	Total Number  of Shares Purchased(a)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs(b)
Period
April 1, 2026 - April 30, 2026	2,614	$	26.74	—
May 1, 2026 - May 31, 2026	17,840	28.21		—
June 1, 2026 - June 30, 2026	2,935	27.54		—
Total	23,389	$	27.96	—	6,950,375

(a) During the second quarter of 2026, the Corporation repurchased 23,389 shares for minimum tax withholding settlements on equity compensation. These purchases do not count against the maximum value of shares remaining available for purchase under the Board of Directors' 2021 and 2026 authorization.

(b) On January 27 and April 28, 2026, the Board of Directors authorized the repurchase of up to $100 million each of the Corporation's common stock. This repurchase authorization was in addition to the authority remaining under the previous program. At June 30, 2026, there remained $213.9 million authorized to be repurchased in the aggregate. Approximately 7.0 million shares of common stock remained available to be repurchased under this Board authorization given the closing share price on June 30, 2026.

Repurchases under Board authorized repurchase programs are subject to any necessary regulatory approvals and other limitations and may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchases, or similar facilities.

ITEM 5. Other Information

During the three months ended June 30, 2026, no director or "officer" of the Corporation adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

80

ITEM 6. Exhibits

(a)    Exhibits:

Exhibit (31.1), Certification Under Section 302 of Sarbanes-Oxley by Andrew J. Harmening, Chief Executive Officer.

Exhibit (31.2), Certification Under Section 302 of Sarbanes-Oxley by Derek S. Meyer, Chief Financial Officer.

Exhibit (32), Certification by the Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of Sarbanes-Oxley.

Exhibit (101), Interactive data files pursuant to Rule 405 of Regulation S-T: (i) Unaudited Consolidated Balance Sheets, (ii) Unaudited Consolidated Statements of Income, (iii) Unaudited Consolidated Statements of Comprehensive Income, (iv) Unaudited Consolidated Statements of Changes in Stockholders’ Equity, (v) Unaudited Consolidated Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements.

Exhibit (104), The cover page from the Corporation's Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 has been formatted in Inline XBRL (Inline Extensible Business Reporting Language) and contained in Exhibits in 101.

81

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ASSOCIATED BANC-CORP
	(Registrant)
Date: August 4, 2026	/s/ Andrew J. Harmening
	Andrew J. Harmening
	President and Chief Executive Officer
Date: August 4, 2026	/s/ Derek S. Meyer
	Derek S. Meyer
	Chief Financial Officer
Date: August 4, 2026	/s/ Ryan J. Beld
	Ryan J. Beld
	Chief Accounting Officer

82

EX-31.1

Exhibit 31.1

CERTIFICATION UNDER SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

CERTIFICATIONS

I, Andrew J. Harmening, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Associated Banc-Corp;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 4, 2026	/s/ Andrew J. Harmening
	Andrew J. Harmening
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION UNDER SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

CERTIFICATIONS

I, Derek S. Meyer, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Associated Banc-Corp;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 4, 2026	/s/ Derek S. Meyer
	Derek S. Meyer
	Chief Financial Officer

EX-32

Exhibit 32

Certification by the Chief Executive Officer and Chief Financial

Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant

to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of Associated Banc-Corp, a Wisconsin corporation (the “Company”), does hereby certify that:

1. The accompanying Quarterly Report of the Company on Form 10-Q for the quarter ended June 30, 2026 (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Andrew J. Harmening

Andrew J. Harmening

Chief Executive Officer

August 4, 2026

/s/ Derek S. Meyer

Derek S. Meyer

Chief Financial Officer

August 4, 2026

XML

Document and Entity Information - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2026	Jul. 31, 2026
Entity Information [Line Items]
Document Type	10-Q	10-Q
Document Quarterly Report		true
Document Period End Date		Jun. 30, 2026
Document Transition Report		false
Entity File Number		001-31343
Entity Registrant Name	Associated Banc-Corp	Associated Banc-Corp
Entity Incorporation, State or Country Code		WI
Entity Address, Address Line One		433 Main Street
Entity Address, City or Town		Green Bay,
Entity Address, State or Province		WI
Entity Tax Identification Number		39-1098068
Entity Address, Postal Zip Code		54301
City Area Code		920
Local Phone Number		491-7500
Entity Current Reporting Status		Yes
Entity Interactive Data Current		Yes
Entity Filer Category		Large Accelerated Filer
Entity Emerging Growth Company		false
Entity Small Business		false
Entity Shell Company		false
Entity Common Stock, Shares Outstanding			188,849,659
Entity Central Index Key		0000007789
Amendment Flag		false
Document Fiscal Year Focus		2026
Document Fiscal Period Focus		Q2
Current Fiscal Year End Date		--12-31
Document Information [Line Items]
Amendment Flag		false
The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security		Common stock, par value $0.01 per share
Trading Symbol		ASB
Security Exchange Name		NYSE
The New York Stock Exchange | Two Thousand Twenty Three Subordinated Notes [Member]
Entity Information [Line Items]
Title of 12(b) Security		6.625% Fixed-Rate Reset Subordinated Notes due 2033
Trading Symbol		ASBA
Security Exchange Name		NYSE
Series E Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security		Depositary Shrs, each representing 1/40th intrst in a shr of 5.875% Non-Cum. Perp Pref Stock, Srs E
Trading Symbol		ASB PrE
Security Exchange Name		NYSE
Series F Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security		Depositary Shrs, each representing 1/40th intrst in a shr of 5.625% Non-Cum. Perp Pref Stock, Srs F
Trading Symbol		ASB PrF
Security Exchange Name		NYSE

XML

Consolidated Balance Sheets - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Assets [Abstract]
Cash and Due from Banks	$ 548,057,000	$ 574,698,000
Interest-Bearing Deposits in Banks and Other Financial Institutions	1,268,379,000	1,144,123,000
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	14,355,000	1,400,000
Debt Securities, Available-for-Sale	6,366,586,000	5,397,563,000
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	3,510,726,000	3,602,519,000
Equity Securities, FV-NI and without Readily Determinable Fair Value	29,960,000	26,060,000
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	329,436,000	252,514,000
Loans and Leases Receivable, Net of Deferred Income	36,467,040,000	31,163,614,000
Loans and Leases Receivable, Allowance	(443,729,000)	(378,068,000)
Loans and Leases Receivable, Net Amount	36,023,311,000	30,785,546,000
Other Short-Term Investments	235,536,000	236,657,000
Property, Plant and Equipment, Net	449,003,000	381,624,000
Life Insurance, Corporate or Bank Owned, Amount	717,116,000	694,452,000
Goodwill	1,147,081,000	1,104,992,000
Intangible Assets, Net (Excluding Goodwill)	116,953,000	22,849,000
Servicing Asset at Fair Value, Amount	87,683,000	86,337,000
Interest Receivable	181,916,000	161,118,000
Other Assets	676,918,000	657,645,000
Assets, Total	51,812,506,000	45,202,596,000
Liabilities and Equity [Abstract]
Noninterest-Bearing Domestic Deposit, Demand	6,908,338,000	6,126,632,000
Interest-Bearing Deposit Liabilities, Domestic	33,022,917,000	29,425,976,000
Deposits, Total	39,931,255,000	35,552,608,000
Short-Term Debt	529,276,000	307,864,000
Federal Home Loan Bank, Advance, Branch of FHLBank, Amount	4,574,681,000	3,268,094,000
Other Long-Term Debt	591,080,000	594,276,000
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	50,744,000	41,276,000
Other Liabilities	497,347,000	463,131,000
Liabilities, Total	46,174,383,000	40,227,249,000
Equity, Attributable to Parent [Abstract]
Preferred Stock, Including Additional Paid in Capital	194,112,000	194,112,000
Common Stock, Value, Issued	2,120,000	1,890,000
Additional Paid in Capital, Common Stock	2,648,846,000	2,050,410,000
Retained Earnings (Accumulated Deficit)	3,378,406,000	3,226,756,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(79,593,000)	(7,566,000)
Treasury Stock, Value	(505,768,000)	(490,255,000)
Total Common Equity	5,444,011,000	4,781,235,000
Equity, Attributable to Parent, Total	5,638,123,000	4,975,347,000
Liabilities and Equity, Total	$ 51,812,506,000	$ 45,202,596,000
Preferred Stock, Shares Authorized	750,000	750,000
Preferred Stock, Shares Issued	200,000	200,000
Common Stock, Shares Authorized	250,000,000	250,000,000
Common Stock, Shares, Issued	211,991,791	189,016,409
Common Stock, Shares, Outstanding	188,718,072	165,979,940
Preferred Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Residential Mortgage [Member]
Assets [Abstract]
Financing Receivable, Held-for-Sale	$ 94,490,000	$ 72,499,000
Loans and Leases Receivable, Net of Deferred Income	6,808,398,000	6,793,957,000
Liabilities and Equity [Abstract]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	400,000	300,000
Commercial Loan
Assets [Abstract]
Financing Receivable, Held-for-Sale	$ 15,000,000	$ 0

XML

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2026	Dec. 31, 2025
Preferred Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01

XML

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Interest and Dividend Income, Operating [Abstract]
Interest and Fee Income, Loans and Leases	$ 506,528	$ 447,781	$ 933,516	$ 881,080
Interest and Dividend Income, Securities, by Taxable Status [Abstract]
Interest Income, Securities, Operating, Taxable	88,347	71,174	164,023	140,962
Interest Income, Securities, Operating, Tax Exempt	13,725	13,902	27,463	27,858
Other Interest and Dividend Income	14,694	12,679	26,335	21,921
Interest and Dividend Income, Operating, Total	623,294	545,536	1,151,337	1,071,821
Interest Expense, Operating and Nonoperating [Abstract]
Interest Expense, Deposits	203,765	197,656	379,038	406,796
Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase	4,085	2,004	7,818	5,626
Interest Expense, Other Short-Term Borrowings	190	287	306	695
Interest on FHLB Funding	35,052	34,889	66,621	50,979
Interest Expense, Long-Term Debt	10,163	10,700	20,326	21,785
Interest Expense, Operating and Nonoperating, Total	253,255	245,536	474,109	485,881
Interest Income (Expense), Operating, Total	370,039	300,000	677,228	585,940
Provision for Loan, Lease, and Other Losses	19,388	17,996	30,389	30,999
Interest Income (Expense), after Provision for Loan Loss, Total	350,651	282,004	646,839	554,941
Noninterest Income [Abstract]
Capital Market Fees Net	7,476	5,765	14,018	10,110
Fees and Commissions, Mortgage Banking and Servicing	2,777	4,213	8,888	8,035
Gain (Loss) on Sale of Mortgage Loans	0	0	0	(6,976)
Bank Owned Life Insurance Income	4,615	4,135	8,430	9,339
Gain (Loss) on Disposition of Assets	789	(1,735)	1,629	(2,613)
Debt Securities, Available-for-Sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	35	7	6	11
Noninterest Income, Other Operating Income	2,707	2,226	5,571	4,477
Noninterest Income, Total	80,398	66,977	156,256	125,754
Noninterest Expense [Abstract]
Labor and Related Expense	161,168	126,994	296,341	250,890
Information Technology and Data Processing	32,867	26,508	62,603	53,646
Occupancy, Net	14,091	12,644	27,817	28,025
Marketing and Advertising Expense	8,548	7,748	16,374	14,134
Equipment Expense	5,423	4,494	11,033	9,021
Professional Fees	17,454	6,674	24,176	12,757
Payments of Financing Costs	1,552	2,705	3,259	5,299
Federal Deposit Insurance Corporation Premium Expense	10,595	9,708	19,432	20,144
Amortization of Intangible Assets	6,894	2,203	9,096	4,405
Other Noninterest Expense	13,290	9,674	20,914	21,648
Noninterest Expense, Total	271,882	209,352	491,045	419,971
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	159,167	139,629	312,050	260,724
Income Tax Expense (Benefit)	35,603	28,399	68,850	47,808
Net Income (Loss) Attributable to Parent, Total	123,564	111,230	243,200	212,916
Preferred Stock Dividends and Other Adjustments	2,875	2,875	5,750	5,750
Net Income (Loss) Available to Common Stockholders, Basic, Total	$ 120,689	$ 108,355	$ 237,450	$ 207,166
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 0.64	$ 0.65	$ 1.34	$ 1.25
Earnings Per Share, Diluted	$ 0.63	$ 0.65	$ 1.33	$ 1.24
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic	188,084	164,936	176,654	165,081
Weighted Average Number of Shares Outstanding, Diluted	189,899	166,343	178,402	166,506
Fiduciary and Trust [Member]
Noninterest Income [Abstract]
Noninterest Income In Scope of Topic 606	$ 26,217	$ 23,025	$ 51,435	$ 45,522
Deposit Account [Member]
Noninterest Income [Abstract]
Noninterest Income In Scope of Topic 606	15,863	13,147	29,916	25,961
Credit and Debit Card [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606	14,161	11,200	25,740	21,642
Financial Service, Other [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606	$ 5,758	$ 4,995	$ 10,623	$ 10,245

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 123,564	$ 111,230	$ 243,200	$ 212,916
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract]
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	(36,846)	21,317	(73,377)	53,149
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	1,901	2,059	3,590	3,986
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax	8,717	(5,830)	17,407	(14,251)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax, Total	(26,228)	17,545	(52,380)	42,884
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(6,506)	1,264	(14,418)	8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(597)	1,437	(1,343)	2,555
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(1,709)	650	(3,792)	2,668
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(8,812)	3,352	(19,553)	13,755
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(63)	(63)	(126)	(126)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	0	0	0	4,770
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	0	(4)	0	(8)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	15	17	31	(1,157)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total	(48)	(50)	(95)	3,480
Other Comprehensive Income (Loss), Net of Tax, Total	(35,088)	20,847	(72,027)	60,119
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 88,476	$ 132,076	$ 171,173	$ 273,035

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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Board Authorized Purchase Program [Member]	Series E Preferred Stock	Series F Preferred Stock	Performance/Service Based RSAs, RSA,	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common	Treasury Stock, Common Board Authorized Purchase Program [Member]	Treasury Stock, Common Performance/Service Based RSAs, RSA,
Beginning balance at Dec. 31, 2024	$ 4,605,562					$ 194,112	$ 1,890	$ 2,047,349	$ 2,919,252	$ (74,416)	$ (482,626)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	101,687								101,687
Other Comprehensive Income (Loss), Net of Tax	39,272									39,272
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	140,959
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Stock Issued During Period, Value, New Issues	(52)							(52)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	2,192							(14,297)			16,489
Treasury Stock, Value, Acquired, Cost Method		$ (22,292)			$ (5,816)							$ (22,292)	$ (5,816)
Dividends [Abstract]
Dividends, Common Stock, Cash	(38,538)								(38,538)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	$ 7,419							7,419
Common Stock, Dividends, Per Share, Cash Paid	$ 0.23
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625
Ending balance at Mar. 31, 2025	$ 4,686,558					194,112	1,890	2,040,419	2,979,526	(35,144)	(494,246)
Beginning balance at Dec. 31, 2024	4,605,562					194,112	1,890	2,047,349	2,919,252	(74,416)	(482,626)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	212,916								212,916
Other Comprehensive Income (Loss), Net of Tax	60,119									60,119
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	273,035
Ending balance at Jun. 30, 2025	4,780,781					194,112	1,890	2,044,481	3,049,383	(14,297)	(494,788)
Beginning balance at Mar. 31, 2025	4,686,558					194,112	1,890	2,040,419	2,979,526	(35,144)	(494,246)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	111,230								111,230
Other Comprehensive Income (Loss), Net of Tax	20,847									20,847
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	132,076
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	94							543			(449)
Treasury Stock, Value, Acquired, Cost Method					(93)								(93)
Dividends [Abstract]
Dividends, Common Stock, Cash	(38,498)								(38,498)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	$ 3,518							3,518
Common Stock, Dividends, Per Share, Cash Paid	$ 0.23
Preferred Stock, Dividends, Per Share, Cash Paid			0.3671875	0.3515625
Ending balance at Jun. 30, 2025	$ 4,780,781					194,112	1,890	2,044,481	3,049,383	(14,297)	(494,788)
Beginning balance at Dec. 31, 2025	4,975,347					194,112	1,890	2,050,410	3,226,756	(7,566)	(490,255)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	119,635								119,635
Other Comprehensive Income (Loss), Net of Tax	(36,939)									(36,939)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	82,696
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	7,121							(5,126)			12,247
Treasury Stock, Value, Acquired, Cost Method		$ (25,202)			(6,377)							$ (25,202)	(6,377)
Dividends [Abstract]
Dividends, Common Stock, Cash	(40,058)								(40,058)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	$ 7,220							7,220
Common Stock, Dividends, Per Share, Cash Paid	$ 0.24
Preferred Stock, Dividends, Per Share, Cash Paid			0.3671875	0.3515625
Ending balance at Mar. 31, 2026	$ 4,997,872					194,112	1,890	2,052,504	3,303,458	(44,505)	(509,587)
Beginning balance at Dec. 31, 2025	4,975,347					194,112	1,890	2,050,410	3,226,756	(7,566)	(490,255)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	243,200								243,200
Other Comprehensive Income (Loss), Net of Tax	(72,027)									(72,027)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	171,173
Ending balance at Jun. 30, 2026	5,638,123					194,112	2,120	2,648,846	3,378,406	(79,593)	(505,768)
Beginning balance at Mar. 31, 2026	4,997,872					194,112	1,890	2,052,504	3,303,458	(44,505)	(509,587)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	123,564								123,564
Other Comprehensive Income (Loss), Net of Tax	(35,088)									(35,088)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	88,476
Stock Issued During Period, Value, Acquisitions	594,144						230	593,914
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	3,112							(1,360)			4,472
Treasury Stock, Value, Acquired, Cost Method					$ (653)								$ (653)
Dividends [Abstract]
Dividends, Common Stock, Cash	(45,741)								(45,741)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	$ 3,788							3,788
Common Stock, Dividends, Per Share, Cash Paid	$ 0.24
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625
Ending balance at Jun. 30, 2026	$ 5,638,123					$ 194,112	$ 2,120	$ 2,648,846	$ 3,378,406	$ (79,593)	$ (505,768)

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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025
Series E Preferred Stock
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.3671875	$ 0.3671875	$ 0.3671875	$ 0.3671875
Series F Preferred Stock
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.3515625	$ 0.3515625	$ 0.3515625	$ 0.3515625

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss)	$ 123,564	$ 119,635	$ 111,230	$ 101,687	$ 243,200	$ 212,916
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Provision for Loan, Lease, and Other Losses	19,388		17,996		30,389	30,999
Depreciation					24,824	26,006
Mortgage Servicing Rights (MSR) Impairment (Recovery)					(86)	1,632
Amortization of Intangible Assets	6,894		2,203		9,096	4,405
Accretion (Amortization) of Discounts and Premiums, Investments					15,062	18,278
Other Depreciation and Amortization					17,146	17,058
Marketable Securities, Gain (Loss)					4	0
Gain (Loss) on Disposition of Assets	(789)		1,735		(1,629)	2,613
(Gain) loss on mortgage banking activities, net					911	(683)
Gain (Loss) on Sale of Mortgage Loans	0		0		0	6,976
Increase (Decrease) in Obligation, Pension Benefits					(12,308)	(12,372)
Payment for Origination and Purchase, Loan, Held-for-Sale					(367,223)	(273,947)
Proceeds from Sale, Loan, Mortgage, Held-for-Sale					352,641	238,557
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Increase (Decrease) in Accrued Interest Receivable, Net					(898)	(854)
Decrease in net income tax position					34,744	49,335
Increase (Decrease) in Interest Payable, Net					1,610	(3,681)
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities					(53,437)	(11,116)
Increase (Decrease) in Derivative Assets and Liabilities					16,624	(50,962)
Increase (Decrease) in Other Noncurrent Assets					(8,430)	(9,339)
Increase (Decrease) in Other Operating Assets and Liabilities, Net					40,720	(6,184)
Net Cash Provided by (Used in) Operating Activities, Total					342,960	239,637
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments for (Proceeds from) Loans and Leases					(1,593,324)	(865,086)
Payment for Investing Activity [Abstract]
Payments to Acquire Debt Securities, Available-for-Sale					(1,815,271)	(910,262)
Payments to Acquire Held-to-Maturity Securities					0	(994)
Payments to Acquire Federal Home Loan Bank Stock					(130,630)	(177,712)
Proceeds from Investing Activity [Abstract]
Proceeds from Sale of Debt Securities, Available-for-Sale					995,830	0
Proceeds from Sale of Held-to-Maturity Securities					1,221	0
Proceeds from Sale of Federal Home Loan Bank Stock					53,765	76,535
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale					772,971	504,380
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities					92,018	69,279
Proceeds from Sale and Maturity of Other Investments					9,756	7,813
Proceeds from Sale of Mortgage Portfolio					0	564,375
Payments for (Proceeds from) Productive Assets					(21,046)	(18,046)
Net Change in Tax Credit Investments					(12,499)	(14,903)
Net cash received from the American National acquisition					220,898	0
Net Cash Provided by (Used in) Investing Activities, Total					(1,426,311)	(764,621)
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Increase (Decrease) in Deposits					(166,364)	(500,869)
Proceeds from (Repayments of) Short-Term Debt					207,090	(394,784)
Increase (Decrease) in Loans from Federal Home Loan Banks					1,417,750	2,220,000
Payments of FHLBank Borrowings, Financing Activities					(151,007)	(400,065)
Proceeds from FHLBank Borrowings, Financing Activities					0	200,000
Finance Lease, Principal Payments					0	(45)
Repayments of Senior Debt					0	(250,000)
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised					10,233	2,286
Payments of Ordinary Dividends, Common Stock					(85,799)	(77,036)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock					(5,750)	(5,750)
Proceeds from (Payment for) Other Financing Activity					0	(52)
Net Cash Provided by (Used in) Financing Activities, Total					1,193,921	765,485
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total					110,570	240,501
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance		1,720,221		1,019,604	1,720,221	1,019,604	$ 1,019,604
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	1,830,791		1,260,105		1,830,791	1,260,105	1,720,221
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity					469,929	488,277
Stock Issued					594,144	0
Fair Value of Assets Acquired					5,228,544	0
Liabilities Assumed					4,634,400	0
Servicing Asset at Fair Value, Additions					6,159		$ 8,716
Board Authorized Purchase Program [Member]
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Payments for Repurchase of Common Stock					(25,202)	(22,292)
Performance/Service Based RSAs, RSA,
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Payments for Repurchase of Common Stock					(7,030)	(5,910)
Retained Earnings [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss)	$ 123,564	$ 119,635	$ 111,230	$ 101,687	$ 243,200	$ 212,916

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Basis of Presentation

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the financial position, results of operations and comprehensive income, changes in stockholders’ equity, and cash flows of the Corporation for the periods presented, and all such adjustments are of a normal recurring nature. The consolidated financial statements include the accounts of all subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year.

In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. The determination of the ACLL is particularly susceptible to significant change. Management has evaluated subsequent events for potential recognition or disclosure.

Within the tables presented, certain columns and rows may not recalculate due to the use of rounded numbers for disclosure purposes.

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Business Combinations, Asset Acquisitions, Transaction between Entities under Common Control, and Joint Venture Formation

6 Months Ended

Jun. 30, 2026

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Business Combination

Business Combinations On April 1, 2026, the Corporation completed its previously announced acquisition of American National pursuant to the terms of the Merger Agreement by and between the Corporation and American National.

Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) immediately following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.

At the effective time of the merger, 100% of the outstanding shares of voting common stock and non-voting common stock of American National outstanding immediately prior to the effective time of the merger, other than certain shares held by the Corporation or American National, were converted into the right to receive an aggregate 22,975,382 shares of common stock of the Corporation. This represented 36.250 shares of the Corporation's common stock for each share of outstanding common stock of American National, with cash paid in lieu of fractional shares. Total consideration for the acquisition was $594.1 million valued at the acquisition date fair value of $25.86 per share.

American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets. As a result of the acquisition, the Corporation increased its deposit market share and will deliver its products and services to an expanded client base across attractive Midwest markets.

The acquisition of American National has been accounted for as a business combination using the acquisition method of accounting in accordance with FASB ASC Topic 805, Business Combinations. Accordingly, assets acquired and liabilities assumed were recorded at fair value as of the acquisition date. Fair value estimates related to the assets and liabilities from American National are subject to adjustment for up to one year after the closing date of the acquisition as additional information becomes available. The purchase consideration allocation is considered preliminary as certain estimates related to the assets acquired and liabilities assumed are subject to continuing refinement. Valuations subject to refinement include, but are not limited to, loans, certain deposits, certain other assets, and the core deposit intangible asset.

The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the effective date of the American National acquisition.

(in thousands)	April 1, 2026
Total Consideration	$	594,144
Assets
Cash and cash equivalents	$	220,898
Investment securities	989,925
Loans, net	3,716,472
Other intangible assets(a)	103,200
Other assets	155,960
Total assets	$	5,186,455
Liabilities
Deposits	$	4,544,700
Other liabilities	89,700
Total liabilities	$	4,634,400
Fair value of net assets acquired	$	552,055
Goodwill	$	42,089
(a) Core deposit intangibles

The goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Corporation with the former operations of American National. None of the goodwill is deductible for income tax purposes as the acquisition was accounted for as a tax-free exchange.

The Corporation engaged an independent, third-party valuation specialist to assist in the valuation of certain assets acquired and liabilities assumed from the business combination. The following valuation techniques were used in the valuation:

Investment securities: The fair value of AFS investment securities and equity securities was determined utilizing quoted prices in an active market, if available, or an external third party broker opinion of the market value.

Loans, net: Fair values of loans were based on a discounted cash flow methodology that considered factors including the type of loan, related collateral, credit quality status, fixed or variable interest rate, term of loan, amortization status and current discount rates. For the non-credit (interest and liquidity) premium, loans were grouped together according to similar characteristics when applying various valuation techniques. For the credit discount, loans were also grouped based on whether they had more than insignificant deterioration in credit since origination. Purchased loans and leases that reflect a more-than-insignificant deterioration of credit from origination are considered purchase credit deteriorated (PCD) assets. All other loans acquired were deemed purchased seasoned loans (non-PCD). The initial estimate of expected credit losses, excluding credit card loans, was recognized in the ACLL on the date of acquisition using the same methodology as other loans and leases held-for-investment.

The following table includes the fair value and unpaid principal balance of the acquired loans and leases:

(in thousands)	Unpaid principal balance		Premium (Discount)		Loans and leases		Allowance for credit losses on loans		Loans and leases, net
Non-PCD loans	$	3,185,647	$	2,692	$	3,188,339	$	(28,263)	$	3,160,076
PCD Loans	615,403		(19,495)		595,908		(39,512)		556,396
Total	$	3,801,050	$	(16,803)	$	3,784,247	$	(67,775)	$	3,716,472

Core Deposit Intangibles: This intangible asset represents the value of the relationships with deposit customers. The fair value was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative cost of funds, and the interest costs associated with customer deposits. The CDIs will be amortized utilizing the sum of years digits basis.

Time Deposits: The fair value for time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered to the contractual interest rates on such time deposits.

The Corporation's operating results include operating results from American National for the three months ended June 30, 2026. Due to the integration of operating activities into those of the Corporation, bifurcation and reporting of revenues and net income from the former American National operations is impracticable. In addition, such amounts would require significant estimates related to the proper allocation of merger cost savings that cannot be objectively made. The following table presents merger related costs, and the line item that these costs are included in on the consolidated statement of income, for the three and six months ended June 30, 2026. Additional transaction and integration costs will be expensed in future periods as incurred.

(in thousands)	Three Months Ended June 30, 2026		Six Months Ended Jun 30, 2026
Personnel	$	13,364	$	13,364
Technology	781		781
Occupancy	23		103
Business development and advertising	417		654
Equipment	98		98
Legal and professional	9,569		10,253
Other	217		223
Total	$	24,469	$	25,476

Pro Forma Financial Information

The following unaudited pro forma summary presents consolidated information of the Corporation as if the American National acquisition had occurred on January 1, 2025. The amounts do not reflect anticipated operating cost savings, revenue enhancements, or other synergies expected to result from the acquisition. Actual results may differ from the unaudited pro forma information presented.

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(Unaudited) (in thousands)	2026		2025		2026		2025
Net interest income and noninterest income	$	447,151	$	415,810	$	881,852	$	807,328
Net income	141,691		120,532		263,217		212,961

The pro forma adjustments include the effect of excluding acquisition-related expenses of $25.5 million for the six months ended June 30, 2026 and included such expenses in the first half of 2025. These adjustments also include adjusting amortization and accretion of fair value marks on acquired loans, investments, deposits, intangibles, other assets/liabilities, and the effect of income taxes.

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2026

Accounting Standards Update and Change in Accounting Principle [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

The accounting and reporting policies of the Corporation conform to U.S. GAAP and to general practice within the financial services industry. A discussion of these policies can be found in Note 1 Summary of Significant Accounting Policies included in the Corporation’s 2025 Annual Report on Form 10-K, except for new accounting pronouncements adopted, as discussed below.

New Accounting Pronouncements Adopted

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2025-08 Financial Instruments-Credit Losses (Topic 326)	The amendments in this update expand the gross-up approach for initial recognition and measurement of acquired financial assets to purchased seasoned loans.	Early adopted effective April 1, 2026 on a prospective basis, as permitted by the standard	The Corporation early adopted this standard and applied it in the purchase accounting for the acquisition of American National. The ASU expands the gross-up approach to certain acquired non-PCD loans that qualify as purchased seasoned loans, including loans acquired in a business combination, resulting in the acquisition-date allowance for credit losses being added to the loans’ initial amortized cost basis rather than recognized as a Day 1 provision for credit losses. Refer to Note 3 for additional information.

Future Accounting Pronouncements

The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review.

Standard	Description	Date of Anticipated Adoption	Effect on Financial Statements
ASU 2024-03 Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40)	The amendments in this update require a public business entity to disclose specific information about certain costs and expenses in the notes to its financial statements for interim and annual reporting periods. The objective of the disclosure requirements is to provide disaggregated information about a public business entity's expenses to help investors (a) better understand the entity's performance, (b) better assess the entity's prospects for future cash flows, and (c) compare an entity's performance over time and with that of other entities.	Annual period ending December 31, 2027 and subsequent interim periods	The Corporation is currently evaluating the impact on its disclosures.
ASU 2025-06 Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)	The amendments in this update simplify the capitalization guidance by removing all references to prescriptive and sequential software development stages to align with the shift to incremental and iterative software development methods.	Interim period ending March 31, 2028 and subsequent periods	The Corporation is currently evaluating the impact on its disclosures.

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Earnings Per Common Share

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Earnings Per Common Share

Earnings Per Common Share

Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards). Presented below are the calculations for basic and diluted earnings per common share:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands, except per share data)	2026		2025		2026		2025
Net income	$	123,564	$	111,230	$	243,200	$	212,916
Preferred stock dividends	(2,875)		(2,875)		(5,750)		(5,750)
Net income available to common equity	120,689		108,355		237,450		207,166
Common shareholder dividends	(45,634)		(38,304)		(85,577)		(76,636)
Unvested share-based payment awards	(107)		(194)		(223)		(399)
Undistributed earnings	$	74,948	$	69,857	$	151,650	$	130,131
Undistributed earnings allocated to common shareholders	$	74,769	$	69,501	$	151,203	$	129,500
Undistributed earnings allocated to unvested share-based payment awards	179		356		447		630
Undistributed earnings	$	74,948	$	69,857	$	151,650	$	130,131
Basic
Distributed earnings to common shareholders	$	45,634	$	38,304	$	85,577	$	76,636
Undistributed earnings allocated to common shareholders	74,769		69,501		151,203		129,500
Total common shareholders earnings, basic	$	120,403	$	107,805	$	236,780	$	206,137
Diluted
Distributed earnings to common shareholders	$	45,634	$	38,304	$	85,577	$	76,636
Undistributed earnings allocated to common shareholders	74,769		69,501		151,203		129,500
Total common shareholders earnings, diluted	$	120,403	$	107,805	$	236,780	$	206,137
Weighted average common shares outstanding	188,084		164,936		176,654		165,081
Effect of dilutive common stock awards	1,815		1,407		1,748		1,425
Diluted weighted average common shares outstanding	189,899		166,343		178,402		166,506
Basic earnings per common share	$	0.64	$	0.65	$	1.34	$	1.25
Diluted earnings per common share	$	0.63	$	0.65	$	1.33	$	1.24

Excluded from the earnings per common share calculations were nominal amounts and 1.4 million anti-dilutive common stock options for the three months ended June 30, 2026 and 2025, respectively, and nominal amounts and 1.2 million anti-dilutive common stock options for the six months ended June 30, 2026 and 2025, respectively.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The fair values of stock options and restricted stock are amortized as compensation expense on a straight-line basis over the vesting period of the grants. For colleagues who meet the definition of retirement eligible under the 2020 Incentive Compensation Plan and 2025 Equity Incentive Plan (collectively, the Incentive Plans), expenses related to stock options and restricted stock grants are fully recognized on the date the colleague meets the definition of normal or early retirement. Compensation expense recognized is included in personnel expense on the consolidated statements of income.

A summary of the Corporation’s stock option activity for the six months ended June 30, 2026 is presented below:

Stock Options	Shares(a)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value(a)
Outstanding at December 31, 2025	1,460	$	22.71	2.52 years	$	4,483
Exercised	444	23.78
Outstanding at June 30, 2026	1,016	$	22.24	2.43 years	$	8,658
Options Exercisable at June 30, 2026	1,016	$	22.24	2.43 years	$	8,658

(a) In thousands

Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock option. For the six months ended June 30, 2026, the intrinsic value of stock options exercised was $2.3 million, compared to $0.4 million for the six months ended June 30, 2025. All stock options were vested as of December 31, 2025.

The Corporation has issued service-based and performance-based restricted stock grants, in the form of awards and units, under the Incentive Plans. Service-based awards are contingent upon continued employment or meeting the requirements for retirement. Performance-based awards are based on performance goals determined by the Compensation and Benefits Committee of the Corporation's Board of Directors, with vesting ranging from a minimum of 0% to a maximum of 150% of the target award. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date.

The following table summarizes information about the Corporation’s restricted stock activity for the six months ended June 30, 2026:

Restricted Stock	Shares(a)	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2025	2,372	$	22.02
Granted	897	26.49
Vested	849	22.01
Forfeited	47	24.42
Outstanding at June 30, 2026	2,373	$	23.66

(a) In thousands

The Corporation amortizes the expense related to restricted stock awards as compensation expense over the vesting period specified in the grant's award agreement. Performance-based restricted stock granted during 2025 and 2026 will cliff-vest after the three year performance period has ended. Service-based restricted stock granted during 2025 and 2026 will generally vest ratably over a period of four years. Expense for restricted stock of $11.2 million and $11.3 million was recorded for the six months ended June 30, 2026 and June 30, 2025, respectively. Included in compensation expense for the accelerated vesting of restricted stock granted to retirement eligible colleagues was $4.2 million and $4.4 million of expense in the first six months of 2026 and 2025, respectively. The Corporation had $28.1 million of unrecognized compensation costs related to restricted stock at June 30, 2026 that are expected to be recognized over the remaining requisite service periods that extend through the first quarter of 2030.

The Corporation has the ability to issue shares from treasury or new shares upon the exercise of stock options or the granting of restricted stock. The Board of Directors has authorized management to repurchase shares of the Corporation’s common stock, to be made available for issuance in connection with the Corporation’s employee incentive plans and for other corporate purposes. The repurchase of shares, if any, will be based on market and investment opportunities, capital levels, growth prospects, and regulatory constraints. Such repurchases may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchase programs, or similar facilities.

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Investment Securities

6 Months Ended

Jun. 30, 2026

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

Investment Securities

Investment securities are designated as AFS, HTM, or equity on the consolidated balance sheets. The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	7,342	$	4	$	(106)	$	7,240
Residential mortgage-related securities:
FNMA/FHLMC	142,709		815		(6,236)		137,288
GNMA	5,518,890		2,481		(29,723)		5,491,648
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		—		(4,659)		410,221
GNMA	111,910		—		(5,066)		106,844
Asset backed securities:
FFELP	89,197		1		(986)		88,212
SBA	120,221		387		(538)		120,070
Other debt securities(a)	6,750		—		(1,687)		5,063
Total AFS investment securities	$	6,411,899	$	3,688	$	(49,001)	$	6,366,586
HTM investment securities
U.S. Treasury securities	$	997	$	5	$	—	$	1,002
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,797		(124,874)		1,468,604
Residential mortgage-related securities:
FNMA/FHLMC	790,729		39		(130,031)		660,737
GNMA	37,215		18		(2,607)		34,626
Private-label	292,007		—		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	757,723		—		(113,423)		644,300
GNMA	40,423		—		(4,334)		36,089
Total HTM investment securities	$	3,510,775	$	1,859	$	(420,816)	$	3,091,818

(a)Unrealized losses includes allowance for credit losses

The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	3,063	$	1	$	(20)	$	3,044
Residential mortgage-related securities:
FNMA/FHLMC	134,142		1,214		(5,493)		129,863
GNMA	5,000,015		40,067		(253)		5,039,829
Commercial mortgage-related securities:
FNMA/FHLMC	17,959		—		(1,001)		16,958
GNMA	113,374		—		(3,818)		109,556
Asset backed securities:
FFELP	95,977		19		(950)		95,046
SBA	283		—		(14)		269
Other debt securities	3,000		—		(2)		2,998
Total AFS investment securities	$	5,367,813	$	41,301	$	(11,551)	$	5,397,563
HTM investment securities
U.S. Treasury securities	$	996	$	19	$	—	$	1,015
Obligations of state and political subdivisions (municipal securities)	1,628,088		3,070		(123,856)		1,507,302
Residential mortgage-related securities:
FNMA/FHLMC	823,630		165		(127,333)		696,462
GNMA	39,123		82		(2,321)		36,884
Private-label	302,817		—		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	763,370		—		(113,004)		650,366
GNMA	44,552		152		(4,566)		40,138
Total HTM investment securities	$	3,602,576	$	3,488	$	(415,070)	$	3,190,994

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The expected maturities of AFS and HTM securities at June 30, 2026, are shown below:

	AFS					HTM
(in thousands)	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Due in one year or less	$	3,750	$	2,063		$	820,235	$	818,331
Due after one year through five years	7,739		7,655			825		779
Due after five years through ten years	—		—			8,078		7,932
Due after ten years	2,603		2,585			763,540		642,564
Total municipal, U.S. Treasury and other debt securities	14,092		12,303			1,592,678		1,469,606
Residential mortgage-related securities:
FNMA/FHLMC	142,709		137,288			790,729		660,737
GNMA	5,518,890		5,491,648			37,215		34,626
Private-label	—		—			292,007		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		410,221			757,723		644,300
GNMA	111,910		106,844			40,423		36,089
Asset backed securities:
FFELP	89,197		88,212			—		—
SBA	120,221		120,070			—		—
Total investment securities	$	6,411,899	$	6,366,586		$	3,510,775	$	3,091,818
Ratio of fair value to amortized cost			99.3		%			88.1		%

The following table summarizes gross realized gains and losses on AFS securities, the gain or loss on sale and fair value adjustment of equity securities, and proceeds from the sale of AFS investment securities:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Gross losses on HTM securities	$	—	$	—	$	(4)	$	—
Fair value adjustment of equity securities	35		7		10		11
Investment securities (losses) gains, net	$	35	$	7	$	6	$	11

Investment securities with a carrying value of $1.0 billion at June 30, 2026 and $1.2 billion December 31, 2025, respectively, were pledged as required to secure certain deposits or for other purposes.

Accrued interest receivable on HTM securities totaled $17.2 million and $17.7 million at June 30, 2026 and December 31, 2025, respectively. Accrued interest receivable on AFS securities totaled $25.1 million and $23.0 million at June 30, 2026 and December 31, 2025, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets.

The Corporation holds U.S. Treasury, municipal, and mortgage-related securities issued by the U.S. government or a GSE which are backed by the full faith and credit of the U.S. government and private-label residential mortgage-related securities that have credit enhancement which covers the first 16% of losses and, as a result, no allowance for credit losses has been recorded related to these securities.

There was a nominal allowance for credit losses on HTM securities at June 30, 2026 and $0.1 million at December 31, 2025, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The allowance for credit losses on AFS securities was $1.7 million at June 30, 2026 and zero at December 31, 2025, attributable to a corporate bond acquired through the recent acquisition of American National, included in other debt securities and AFS investment securities, net, at fair value on the consolidated balance sheets.

The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2026:

	Less than 12 months					12 months or more					Total
(in thousands)	Number of Securities	Unrealized Losses		Fair Value		Number of Securities	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	4	$	(99)	$	4,176	1	$	(7)	$	243	$	(106)	$	4,419
Residential mortgage-related securities:
FNMA/FHLMC	34	(604)		47,975		5	(5,632)		44,189		(6,236)		92,164
GNMA	236	(29,685)		4,396,013		2	(38)		1,901		(29,723)		4,397,914
Commercial mortgage-related securities:
FNMA/FHLMC	11	(3,780)		393,331		1	(879)		16,889		(4,659)		410,220
GNMA	—	—		—		15	(5,066)		106,844		(5,066)		106,844
Asset backed securities:
FFELP	2	(75)		30,893		12	(911)		51,501		(986)		82,394
SBA	6	(526)		89,501		2	(12)		183		(538)		89,684
Other debt securities(a)	3	(1,687)		4,062		—	—		—		(1,687)		4,062
Total	296	$	(36,456)	$	4,965,951	38	$	(12,545)	$	221,750	$	(49,001)	$	5,187,701
HTM investment securities
Obligations of state and political subdivisions (municipal securities)	327	$	(6,876)	$	500,662	407	$	(117,998)	$	615,514	$	(124,874)	$	1,116,176
Residential mortgage-related securities:
FNMA/FHLMC	15	(127)		15,968		100	(129,904)		637,637		(130,031)		653,605
GNMA	4	(60)		5,330		79	(2,547)		26,571		(2,607)		31,901
Private-label	—	—		—		18	(45,547)		246,460		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	2	(536)		26,155		43	(112,887)		618,145		(113,423)		644,300
GNMA	—	—		—		13	(4,334)		36,088		(4,334)		36,088
Total	348	$	(7,599)	$	548,115	660	$	(413,217)	$	2,180,415	$	(420,816)	$	2,728,530

(a)Unrealized losses includes allowance for credit losses

For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2025:

	Less than 12 months					12 months or more					Total
(in thousands)	Number of Securities	Unrealized Losses		Fair Value		Number of Securities	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	—	$	—	$	—	2	$	(20)	$	863	$	(20)	$	863
Residential mortgage-related securities:
FNMA/FHLMC	12	(95)		14,155		12	(5,398)		56,215		(5,493)		70,370
GNMA	16	(232)		143,734		3	(21)		2,674		(253)		146,408
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,001)		16,958		(1,001)		16,958
GNMA	—	—		—		15	(3,818)		109,556		(3,818)		109,556
Asset backed securities:
FFELP	2	(152)		33,239		12	(798)		55,565		(950)		88,804
SBA	—	—		—		2	(14)		231		(14)		231
Other debt securities	2	(2)		1,998		—	—		—		(2)		1,998
Total	32	$	(481)	$	193,126	47	$	(11,070)	$	242,062	$	(11,551)	$	435,188
HTM investment securities
Obligations of state and political subdivisions (municipal securities)	81	$	(2,978)	$	89,826	543	$	(120,878)	$	842,485	$	(123,856)	$	932,311
Residential mortgage-related securities:
FNMA/FHLMC	1	—		30		102	(127,333)		676,915		(127,333)		676,945
GNMA	—	—		—		80	(2,321)		30,237		(2,321)		30,237
Private-label	—	—		—		18	(43,990)		258,827		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	2	(470)		26,287		43	(112,534)		624,079		(113,004)		650,366
GNMA	—	—		—		13	(4,566)		40,138		(4,566)		40,138
Total	84	$	(3,448)	$	116,143	799	$	(411,622)	$	2,472,681	$	(415,070)	$	2,588,824

On a quarterly basis, the Corporation refreshes the credit quality of each HTM security. The Company monitors the credit quality of HTM securities through credit ratings provided by S&P and Moody’s. Investment grade securities are rated BBB- or higher by S&P, or Baa3 or higher by Moody’s, and are generally considered by the rating agencies and market participants to be of low credit risk. As of June 30, 2026 and December 31, 2025, the Corporation's HTM portfolio contained all investment grade securities except for securities that were not rated which were individually reviewed noting no credit quality issues.

Based on the Corporation’s evaluation, management does not believe any unrealized losses at June 30, 2026 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions, except as disclosed above. As of June 30, 2026, the Corporation does not intend to sell, nor does it believe that it will be required to sell, the securities in an unrealized loss position before recovery of their amortized cost basis.

Regulatory stocks: The Corporation had FHLB stock of $215.0 million and $154.4 million at June 30, 2026 and December 31, 2025, respectively. The Corporation had Federal Reserve Bank stock of $114.4 million and $98.1 million at June 30, 2026 and December 31, 2025, respectively.

Accrued interest receivable on FHLB stock totaled $4.1 million at June 30, 2026 and $2.8 million at December 31, 2025. There was no accrued interest receivable on Federal Reserve Bank Stock at both June 30, 2026 and December 31, 2025. Accrued interest receivable on both FHLB stock and Federal Reserve Bank stock is included in interest receivable on the consolidated balance sheets.

Equity Securities

Equity securities with readily determinable fair values: The Corporation's portfolio of equity securities with readily determinable fair values is primarily comprised of mutual funds. The Corporation had equity securities with readily determinable fair values of $15.0 million and $11.1 million at June 30, 2026 and December 31, 2025, respectively.

Equity securities without readily determinable fair values: The Corporation's portfolio of equity securities without readily determinable fair values primarily consists of an investment in a private loan fund. The Corporation had equity securities without readily determinable fair values carried at $15.0 million at both June 30, 2026 and December 31, 2025

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Loans

6 Months Ended

Jun. 30, 2026

Receivables [Abstract]

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

Loans

The period end loan composition was as follows:

(in thousands)	Jun 30, 2026		Dec 31, 2025
Commercial and industrial	$	13,750,175	$	11,799,757
Commercial real estate — owner occupied	1,575,445		1,186,324
Commercial and business lending	15,325,620		12,986,081
Commercial real estate — investor	6,492,950		5,246,030
Real estate construction	2,546,186		1,994,642
Commercial real estate lending	9,039,136		7,240,672
Total commercial	24,364,756		20,226,753
Residential mortgage	6,808,398		6,793,957
Auto finance	4,044,416		3,106,498
Home equity	826,343		713,271
Other consumer	423,127		323,135
Total consumer	12,102,284		10,936,861
Total loans	$	36,467,040	$	31,163,614

Accrued interest receivable on loans totaled $135.4 million at June 30, 2026 and $117.6 million at December 31, 2025, and is included in interest receivable on the consolidated balance sheets. The amount of accrued interest reversed was $0.4 million for the three months ended June 30, 2026 and $0.8 million for the six months ended June 30, 2026, compared to $0.5 million for the three months ended June 30, 2025 and $1.1 million for the six months ended June 30, 2025.

The following table presents loans by credit quality indicator by origination year at June 30, 2026:

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2026		2025		2024		2023		2022		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	3,199	$	2,741,443	$	2,328,388	$	3,787,950	$	1,722,490	$	982,648	$	840,913	$	738,339	$	13,142,171
Special mention	—		22,708		626		26,761		24,508		9,346		5,458		72,581		161,988
Substandard	668		94,753		38,835		33,522		32,732		12,846		130,614		58,326		401,628
Nonaccrual	20		635		2,160		27,179		4,617		4,506		474		4,817		44,388
Commercial and industrial	$	3,887	$	2,859,539	$	2,370,009	$	3,875,412	$	1,784,347	$	1,009,346	$	977,459	$	874,063	$	13,750,175
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	182,249	$	129,676	$	247,821	$	199,462	$	146,763	$	197,576	$	380,833	$	1,484,380
Special mention	—		1,363		—		4,713		5,016		2,059		90		5,980		19,221
Substandard	—		11,913		1,886		2,097		14,611		14,693		47		23,342		68,589
Nonaccrual	—		—		—		1,797		—		—		524		934		3,255
Commercial real estate - owner occupied	$	—	$	195,525	$	131,562	$	256,428	$	219,089	$	163,515	$	198,237	$	411,089	$	1,575,445
Commercial and business lending:
Risk rating:
Pass	$	3,199	$	2,923,692	$	2,458,064	$	4,035,771	$	1,921,952	$	1,129,411	$	1,038,489	$	1,119,172	$	14,626,551
Special mention	—		24,071		626		31,474		29,524		11,405		5,548		78,561		181,209
Substandard	668		106,666		40,721		35,619		47,343		27,539		130,661		81,668		470,217
Nonaccrual	20		635		2,160		28,976		4,617		4,506		998		5,751		47,643
Commercial and business lending	$	3,887	$	3,055,064	$	2,501,571	$	4,131,840	$	2,003,436	$	1,172,861	$	1,175,696	$	1,285,152	$	15,325,620
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	695,209	$	1,061,877	$	1,762,223	$	662,819	$	438,221	$	679,245	$	844,791	$	6,144,385
Special mention	—		633		33,369		5,553		3,066		48,292		58,136		29,885		178,934
Substandard	—		21,867		10,855		12,186		24,000		5,783		54,229		29,527		158,447
Nonaccrual	—		698		—		793		—		—		7,914		1,779		11,184
Commercial real estate - investor	$	—	$	718,407	$	1,106,101	$	1,780,755	$	689,885	$	492,296	$	799,524	$	905,982	$	6,492,950
Real estate construction:
Risk rating:
Pass	$	—	$	219,286	$	161,036	$	541,782	$	872,017	$	152,821	$	3,414	$	6,963	$	1,957,319
Special mention	—		2,663		—		—		15,405		—		75,656		—		93,724
Substandard	—		25,497		80,123		105,451		7,685		34,493		238,920		—		492,169
Nonaccrual	—		2,913		—		—		—		38		—		23		2,974
Real estate construction	$	—	$	250,359	$	241,159	$	647,233	$	895,107	$	187,352	$	317,990	$	6,986	$	2,546,186
Commercial real estate lending:
Risk rating:
Pass	$	—	$	914,495	$	1,222,913	$	2,304,005	$	1,534,836	$	591,042	$	682,659	$	851,754	$	8,101,704
Special mention	—		3,296		33,369		5,553		18,471		48,292		133,792		29,885		272,658
Substandard	—		47,364		90,978		117,637		31,685		40,276		293,149		29,527		650,616
Nonaccrual	—		3,611		—		793		—		38		7,914		1,802		14,158
Commercial real estate lending	$	—	$	968,766	$	1,347,260	$	2,427,988	$	1,584,992	$	679,648	$	1,117,514	$	912,968	$	9,039,136
Total commercial:
Risk rating:
Pass	$	3,199	$	3,838,187	$	3,680,977	$	6,339,776	$	3,456,788	$	1,720,453	$	1,721,148	$	1,970,926	$	22,728,255
Special mention	—		27,367		33,995		37,027		47,995		59,697		139,340		108,446		453,867
Substandard	668		154,030		131,699		153,256		79,028		67,815		423,810		111,195		1,120,833
Nonaccrual	20		4,246		2,160		29,769		4,617		4,544		8,912		7,553		61,801
Total commercial	$	3,887	$	4,023,830	$	3,848,831	$	6,559,828	$	3,588,428	$	1,852,509	$	2,293,210	$	2,198,120	$	24,364,756

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2026		2025		2024		2023		2022		Prior		Total
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	176,272	$	309,720	$	254,049	$	438,829	$	1,461,192	$	4,090,505	$	6,730,567
Special mention	—		—		—		315		—		—		—		188		503
Substandard	—		—		5,355		—		572		366		454		246		6,993
Nonaccrual	—		—		—		2,054		4,408		7,680		11,041		45,152		70,335
Residential mortgage	$	—	$	—	$	181,627	$	312,089	$	259,029	$	446,875	$	1,472,687	$	4,136,091	$	6,808,398
Auto finance:
Risk rating:
Pass	$	—	$	—	$	856,927	$	1,398,649	$	867,078	$	498,862	$	351,555	$	57,048	$	4,030,119
Special mention	—		—		84		1,032		581		868		625		134		3,324
Nonaccrual	—		—		393		1,686		2,058		3,351		3,083		402		10,973
Auto finance	$	—	$	—	$	857,404	$	1,401,367	$	869,717	$	503,081	$	355,263	$	57,584	$	4,044,416
Home equity:
Risk rating:
Pass	$	11,561	$	726,750	$	1,158	$	5,253	$	3,937	$	4,886	$	21,268	$	55,324	$	818,576
Special mention	78		102		—		—		130		—		39		914		1,185
Nonaccrual	272		317		—		102		151		159		1,025		4,828		6,582
Home equity	$	11,911	$	727,169	$	1,158	$	5,355	$	4,218	$	5,045	$	22,332	$	61,066	$	826,343
Other consumer:
Risk rating:
Pass	$	84	$	260,894	$	36,667	$	44,583	$	18,197	$	10,311	$	5,627	$	43,888	$	420,167
Special mention	1		885		—		17		62		47		45		9		1,065
Substandard	—		1,633		—		—		—		—		—		—		1,633
Nonaccrual	—		47		—		60		47		41		53		14		262
Other consumer	$	85	$	263,459	$	36,667	$	44,660	$	18,306	$	10,399	$	5,725	$	43,911	$	423,127
Total consumer:
Risk rating:
Pass	$	11,645	$	987,644	$	1,071,024	$	1,758,205	$	1,143,261	$	952,888	$	1,839,642	$	4,246,765	$	11,999,429
Special mention	79		987		84		1,364		773		915		709		1,245		6,077
Substandard	—		1,633		5,355		—		572		366		454		246		8,626
Nonaccrual	272		364		393		3,902		6,664		11,231		15,202		50,396		88,152
Total consumer	$	11,996	$	990,628	$	1,076,856	$	1,763,471	$	1,151,270	$	965,400	$	1,856,007	$	4,298,652	$	12,102,284
Total loans:
Risk rating:
Pass	$	14,844	$	4,825,831	$	4,752,001	$	8,097,981	$	4,600,049	$	2,673,341	$	3,560,790	$	6,217,691	$	34,727,684
Special mention	79		28,354		34,079		38,391		48,768		60,612		140,049		109,691		459,944
Substandard	668		155,663		137,054		153,256		79,600		68,181		424,264		111,441		1,129,459
Nonaccrual	292		4,610		2,553		33,671		11,281		15,775		24,114		57,949		149,953
Total loans	$	15,883	$	5,014,458	$	4,925,687	$	8,323,299	$	4,739,698	$	2,817,909	$	4,149,217	$	6,496,772	$	36,467,040

(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.

The following table presents loans by credit quality indicator by origination year at December 31, 2025:

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	503	$	1,920,351	$	3,886,880	$	2,097,760	$	1,133,873	$	1,238,941	$	521,793	$	471,834	$	11,271,432
Special mention	—		11,139		3,024		311		13,774		5,849		24,971		293		59,361
Substandard	7,290		65,451		60,593		78,773		22,126		162,841		70,231		1,771		461,786
Nonaccrual	1,473		—		25		7,153		—		—		—		—		7,178
Commercial and industrial	$	9,266	$	1,996,941	$	3,950,522	$	2,183,997	$	1,169,773	$	1,407,631	$	616,995	$	473,898	$	11,799,757
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	2,957	$	241,141	$	180,867	$	141,254	$	167,496	$	157,837	$	201,588	$	1,093,140
Special mention	—		—		—		11,620		5,432		—		—		1,242		18,294
Substandard	—		13,445		7,478		14,001		15,635		1,691		11,929		10,508		74,687
Nonaccrual	—		—		203		—		—		—		—		—		203
Commercial real estate - owner occupied	$	—	$	16,402	$	248,822	$	206,488	$	162,321	$	169,187	$	169,766	$	213,338	$	1,186,324
Commercial and business lending:
Risk rating:
Pass	$	503	$	1,923,308	$	4,128,021	$	2,278,627	$	1,275,127	$	1,406,437	$	679,630	$	673,422	$	12,364,572
Special mention	—		11,139		3,024		11,931		19,206		5,849		24,971		1,535		77,655
Substandard	7,290		78,896		68,071		92,774		37,761		164,532		82,160		12,279		536,473
Nonaccrual	1,473		—		228		7,153		—		—		—		—		7,381
Commercial and business lending	$	9,266	$	2,013,343	$	4,199,344	$	2,390,485	$	1,332,094	$	1,576,818	$	786,761	$	687,236	$	12,986,081
Commercial real estate - investor:
Risk rating:
Pass	$	3,195	$	185,825	$	1,842,395	$	776,187	$	503,511	$	711,947	$	432,442	$	503,468	$	4,955,775
Special mention	—		—		40,067		11,135		14,809		58,523		26,964		5,007		156,505
Substandard	—		—		24,090		1,446		7,741		70,608		17,633		3,921		125,439
Nonaccrual	—		—		—		546		—		7,765		—		—		8,311
Commercial real estate - investor	$	3,195	$	185,825	$	1,906,552	$	789,314	$	526,061	$	848,843	$	477,039	$	512,396	$	5,246,030
Real estate construction:
Risk rating:
Pass	$	—	$	33,847	$	359,610	$	720,429	$	223,239	$	175,056	$	2,991	$	5,768	$	1,520,940
Special mention	—		—		20,611		—		—		51,262		—		—		71,873
Substandard	—		—		122,320		42,511		48,980		187,874		—		—		401,685
Nonaccrual	—		—		—		—		—		—		—		144		144
Real estate construction	$	—	$	33,847	$	502,541	$	762,940	$	272,219	$	414,192	$	2,991	$	5,912	$	1,994,642
Commercial real estate lending:
Risk rating:
Pass	$	3,195	$	219,672	$	2,202,005	$	1,496,616	$	726,750	$	887,003	$	435,433	$	509,236	$	6,476,715
Special mention	—		—		60,678		11,135		14,809		109,785		26,964		5,007		228,378
Substandard	—		—		146,410		43,957		56,721		258,482		17,633		3,921		527,124
Nonaccrual	—		—		—		546		—		7,765		—		144		8,455
Commercial real estate lending	$	3,195	$	219,672	$	2,409,093	$	1,552,254	$	798,280	$	1,263,035	$	480,030	$	518,308	$	7,240,672

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Total commercial:
Risk rating:
Pass	$	3,698	$	2,142,980	$	6,330,026	$	3,775,243	$	2,001,877	$	2,293,440	$	1,115,063	$	1,182,658	$	18,841,287
Special mention	—		11,139		63,702		23,066		34,015		115,634		51,935		6,542		306,033
Substandard	7,290		78,896		214,481		136,731		94,482		423,014		99,793		16,200		1,063,597
Nonaccrual	1,473		—		228		7,699		—		7,765		—		144		15,836
Total commercial	$	12,461	$	2,233,015	$	6,608,437	$	3,942,739	$	2,130,374	$	2,839,853	$	1,266,791	$	1,205,544	$	20,226,753
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	253,364	$	238,787	$	480,076	$	1,488,335	$	1,499,223	$	2,764,379	$	6,724,164
Substandard	—		—		—		580		292		129		300		—		1,301
Nonaccrual	—		—		2,425		3,102		5,101		13,141		8,985		35,738		68,492
Residential mortgage	$	—	$	—	$	255,789	$	242,469	$	485,469	$	1,501,605	$	1,508,508	$	2,800,117	$	6,793,957
Auto finance:
Risk rating:
Pass	$	—	$	—	$	1,287,267	$	842,838	$	551,549	$	388,064	$	26,402	$	2	$	3,096,122
Special mention	—		—		295		325		814		621		50		—		2,105
Nonaccrual	—		—		559		1,356		2,811		3,255		290		—		8,271
Auto finance	$	—	$	—	$	1,288,121	$	844,519	$	555,174	$	391,940	$	26,742	$	2	$	3,106,498
Home equity:
Risk rating:
Pass	$	15,259	$	623,853	$	855	$	2,188	$	2,728	$	20,514	$	4,733	$	49,793	$	704,664
Special mention	315		52		—		119		190		104		—		368		833
Nonaccrual	1,038		173		2		221		333		1,016		414		5,615		7,774
Home equity	$	16,612	$	624,078	$	857	$	2,528	$	3,251	$	21,634	$	5,147	$	55,776	$	713,271
Other consumer:
Risk rating:
Pass	$	529	$	255,490	$	13,159	$	4,070	$	1,990	$	958	$	264	$	43,575	$	319,506
Special mention	12		1,139		27		—		5		9		—		20		1,200
Substandard	—		2,374		—		—		—		—		—		—		2,374
Nonaccrual	2		35		—		3		12		—		2		3		55
Other consumer	$	543	$	259,038	$	13,186	$	4,073	$	2,007	$	967	$	266	$	43,598	$	323,135
Total consumer:
Risk rating:
Pass	$	15,788	$	879,343	$	1,554,645	$	1,087,883	$	1,036,343	$	1,897,871	$	1,530,622	$	2,857,749	$	10,844,456
Special mention	327		1,191		322		444		1,009		734		50		388		4,138
Substandard	—		2,374		—		580		292		129		300		—		3,675
Nonaccrual	1,040		208		2,986		4,682		8,257		17,412		9,691		41,356		84,592
Total consumer	$	17,155	$	883,116	$	1,557,953	$	1,093,589	$	1,045,901	$	1,916,146	$	1,540,663	$	2,899,493	$	10,936,861
Total loans:
Risk rating:
Pass	$	19,486	$	3,022,323	$	7,884,671	$	4,863,126	$	3,038,220	$	4,191,311	$	2,645,685	$	4,040,407	$	29,685,743
Special mention	327		12,330		64,024		23,510		35,024		116,368		51,985		6,930		310,171
Substandard	7,290		81,270		214,481		137,311		94,774		423,143		100,093		16,200		1,067,272
Nonaccrual	2,513		208		3,214		12,381		8,257		25,177		9,691		41,500		100,428
Total loans	$	29,616	$	3,116,131	$	8,166,390	$	5,036,328	$	3,176,275	$	4,755,999	$	2,807,454	$	4,105,037	$	31,163,614

(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.

The following table presents gross charge offs by origination year for the six months ended June 30, 2026:

			Gross Charge Offs by Origination Year
(in thousands)	Rev Loans Amortized Cost Basis		2026		2025		2024		2023		2022		Prior		Total
Commercial and industrial	$	13,356	$	135	$	160	$	254	$	712	$	425	$	6,191	$	21,233
Commercial real estate-owner occupied	—		—		—		—		—		—		—		—
Commercial and business lending	13,356		135		160		254		712		425		6,191		21,233
Commercial real estate-investor	—		—		—		—		—		—		2,710		2,710
Real estate construction	—		—		—		—		—		—		—		—
Commercial real estate lending	—		—		—		—		—		—		2,710		2,710
Total commercial	13,356		135		160		254		712		425		8,901		23,943
Residential mortgage	—		—		6		57		66		24		107		260
Auto finance	—		110		1,125		1,135		1,547		1,742		179		5,838
Home equity	1		—		60		—		2		13		16		92
Other consumer	4,150		10		100		30		26		12		31		4,359
Total consumer	4,151		120		1,291		1,222		1,641		1,791		333		10,549
Total gross charge offs	$	17,507	$	255	$	1,451	$	1,476	$	2,353	$	2,216	$	9,234	$	34,492

The following table presents gross charge offs by origination year for the year ended December 31, 2025:

			Gross Charge Offs by Origination Year
(in thousands)	Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Commercial and industrial	$	5,424	$	831	$	627	$	3,555	$	3,799	$	379	$	—	$	14,615
Commercial real estate-owner occupied	—		—		—		113		—		—		—		113
Commercial and business lending	5,424		831		627		3,668		3,799		379		—		14,728
Commercial real estate-investor	—		—		8,356		184		12,666		—		—		21,206
Real estate construction	—		—		—		—		—		—		—		—
Commercial real estate lending	—		—		8,356		184		12,666		—		—		21,206
Total commercial	5,424		831		8,983		3,852		16,465		379		—		35,934
Residential mortgage	—		—		115		209		320		74		430		1,148
Auto finance	—		432		1,699		2,804		3,384		433		—		8,752
Home equity	—		—		—		26		5		5		380		416
Other consumer	8,194		18		85		63		63		224		56		8,703
Total consumer	8,194		450		1,899		3,102		3,772		736		866		19,019
Total gross charge offs	$	13,618	$	1,281	$	10,882	$	6,954	$	20,237	$	1,115	$	866	$	54,953

Factors that are important to managing overall credit quality are sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, and appropriate policies for ACLL, nonaccrual loans, and charge offs.

For commercial loans, management has determined the pass credit quality indicator to include credits exhibiting acceptable financial statements, cash flow, and leverage. If any risk exists, it is mitigated by the loan structure, collateral, monitoring, or control. For consumer loans, performing loans include credits performing in accordance with the original contractual terms.

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Special mention credits have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit or in the credit position at some future date. Accruing loan modifications could be pass or special mention, depending on the risk rating on the loan. Substandard loans are considered inadequately protected by the current sound worth and paying capacity of the obligor or the collateral pledged, if any. These loans have a well-defined weakness, or weaknesses, which may jeopardize liquidation of the debt, and are characterized by the distinct possibility the Corporation will sustain some loss if the deficiencies are not corrected. Commercial loan relationships over $0.5 million in nonaccrual status, or that otherwise do not share similar risk characteristics with other loans, including those for which a debt restructuring is probable, are evaluated individually for expected credit losses. Commercial loans classified as special mention, substandard, and nonaccrual are reviewed at a minimum on a quarterly basis, while pass credits, which are performing rated credits, are generally reviewed on an annual basis or more frequently if the loan renewal is less than one year or if otherwise warranted.

The recorded investment of consumer loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $19.4 million and $20.1 million at June 30, 2026 and December 31, 2025, respectively.

The following table presents loans by past due status at June 30, 2026:

	Accruing
(in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90+ Days Past Due		Nonaccrual(a)(b)		Total
Commercial and industrial	$	13,694,693	$	834	$	9,834	$	426	$	44,388	$	13,750,175
Commercial real estate - owner occupied	1,571,158		893		—		139		3,255		1,575,445
Commercial and business lending	15,265,851		1,727		9,834		565		47,643		15,325,620
Commercial real estate - investor	6,478,677		1,839		1,250		—		11,184		6,492,950
Real estate construction	2,541,775		581		856		—		2,974		2,546,186
Commercial real estate lending	9,020,452		2,420		2,106		—		14,158		9,039,136
Total commercial	24,286,303		4,147		11,940		565		61,801		24,364,756
Residential mortgage	6,724,029		13,531		503		—		70,335		6,808,398
Auto finance	4,013,076		17,043		3,324		—		10,973		4,044,416
Home equity	815,225		3,351		1,185		—		6,582		826,343
Other consumer(c)	418,154		1,899		1,089		1,723		262		423,127
Total consumer	11,970,484		35,824		6,101		1,723		88,152		12,102,284
Total loans	$	36,256,787	$	39,971	$	18,041	$	2,288	$	149,953	$	36,467,040

(a) Of the total nonaccrual loans, $78.9 million, or 53%, were current with respect to payment at June 30, 2026.

(b) No interest income was recognized on nonaccrual loans for the three and six months ended June 30, 2026. In addition, there were $18.2 million of nonaccrual loans for which there was no related ACLL at June 30, 2026.

(c) Past due portions exclude guaranteed student loans.

The following table presents loans by past due status at December 31, 2025:

	Accruing
(in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90+ Days  Past Due		Nonaccrual(a)(b)		Total
Commercial and industrial	$	11,789,526	$	2,153	$	530	$	370	$	7,178	$	11,799,757
Commercial real estate - owner occupied	1,186,087		—		34		—		203		1,186,324
Commercial and business lending	12,975,613		2,153		564		370		7,381		12,986,081
Commercial real estate - investor	5,218,314		14,148		5,257		—		8,311		5,246,030
Real estate construction	1,994,381		117		—		—		144		1,994,642
Commercial real estate lending	7,212,695		14,265		5,257		—		8,455		7,240,672
Total commercial	20,188,308		16,418		5,821		370		15,836		20,226,753
Residential mortgage	6,712,330		13,135		—		—		68,492		6,793,957
Auto finance	3,081,782		14,340		2,105		—		8,271		3,106,498
Home equity	701,719		2,945		833		—		7,774		713,271
Other consumer(c)	317,932		1,473		1,231		2,444		55		323,135
Total consumer	10,813,763		31,893		4,169		2,444		84,592		10,936,861
Total loans	$	31,002,071	$	48,311	$	9,990	$	2,814	$	100,428	$	31,163,614

(a) Of the total nonaccrual loans, $31.2 million, or 31%, were current with respect to payment at December 31, 2025.

(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2025. In addition, there were $14.6 million of nonaccrual loans for which there was no related ACLL at December 31, 2025

(c) Past due portions exclude guaranteed student loans.

Loan Modifications

The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at June 30, 2026 and June 30, 2025.

	Interest Rate Concession
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Commercial and industrial	$	120	$	154	$	273	$	294
Other consumer	727		737		1,330		1,529
Total loans modified	$	847	$	891	$	1,603	$	1,823

	Term Extension
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Residential mortgage	$	553	$	305	$	1,059	$	305

	Combination - Interest Rate Concession and Term Extension
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Residential mortgage	$	1,137	$	591	$	3,463	$	2,094
Home equity	37		67		88		125
Total loans modified	$	1,174	$	658	$	3,551	$	2,219

The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans.

	Interest Rate Concession
	Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
Loan Type	2026		2025		2026		2025
Commercial and industrial	(22)	%	(23)	%	(22)	%	(24)	%
Residential mortgage	—	%	2	%	1	%	1	%
Home equity	(2)	%	—	%	(2)	%	(2)	%
Other consumer	(22)	%	(21)	%	(21)	%	(21)	%
Weighted average of total loans modified	(9)	%	(10)	%	(6)	%	(8)	%

(a) Some interest rate concessions may involve an increase in rate that was lower in comparison to prevailing market rates.

	Term Extension
	Financial Effect, Weighted Average Term Increase(a)
	Three Months Ended Jun 30,		Six Months Ended Jun 30,
Loan Type	2026	2025	2026	2025
Residential mortgage	115 months	165 months	107 months	152 months
Home equity	240 months	60 months	131 months	60 months
Weighted average of total loans modified	118 months	158 months	107 months	147 months

(a) During the three months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 300 to 418 months and 268 to 426 months, respectively. During the six months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 305 to 412 months and 267 to 414, respectively.

The Corporation closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2026:

	Payment Status (Amortized Cost Basis)
(in thousands)	Current		30-89 Days Past Due		90+ Days Past Due
Commercial and industrial	$	367	$	—	$	—
Residential mortgage	6,509		943		1,183
Home equity	239		—		27
Other consumer	2,055		—		—
Total loans modified	$	9,170	$	943	$	1,210

The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2025:

	Payment Status (Amortized Cost Basis)
(in thousands)	Current		30-89 Days Past Due		90+ Days Past Due
Commercial and industrial	$	431	$	—	$	—
Residential mortgage	3,406		605		702
Home equity	288		31		—
Other consumer	2,303		—		—
Total loans modified	$	6,427	$	635	$	702

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession for loans that were modified in the previous twelve months and subsequently had a payment default during the six months ended June 30, 2026:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
(in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Residential mortgage	$	—	$	—	$	303

None of the loans modified in the previous twelve months subsequently had a payment default during the six months ended June 30, 2025.

The nature and extent of the impairment of modified loans, including those which have experienced a subsequent payment default, are considered in the determination of an appropriate level of the ACLL.

Allowance for Credit Losses on Loans

The ACLL is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the ACLL represents management’s estimate of an amount appropriate to provide for expected lifetime credit losses in the loan portfolio at the balance sheet date. The expected lifetime credit losses are the product of multiplying the Corporation's estimates of probability of default, loss given default, and the individual loan level exposure at default on an undiscounted basis. A main factor in the determination of the ACLL is the economic forecast. The forecast the Corporation used for June 30, 2026 was the Moody's baseline scenario from May 2026, which was reviewed against the June 2026 baseline scenario with no material updates made, over a two-year reasonable and supportable period with straight-line reversion to the historical losses over the second year of the period. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit). See Note 12 for additional information on the change in the allowance for unfunded commitments.

The following table presents a summary of the changes in the ACLL by portfolio segment for the six months ended June 30, 2026:

(in thousands)	Dec 31, 2025		Provision for loan losses recorded at acquisition		Allowance for PCD loans acquired		Allowance for PSL acquired		Charge offs		Recoveries		Net (Charge offs) Recoveries		Provision for Credit Losses		Jun 30, 2026		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	168,636	$	294	$	19,514	$	5,086	$	(21,233)	$	893	$	(20,340)	$	29,105	$	202,295
Commercial real estate — owner occupied	11,327		—		2,516		1,198		—		—		—		(1,887)		13,154
Commercial and business lending	179,963		294		22,030		6,284		(21,233)		893		(20,340)		27,218		215,449
Commercial real estate — investor	58,243		—		11,640		7,590		(2,710)		500		(2,210)		(10,475)		64,788
Real estate construction	46,595		—		3,459		3,298		—		4		4		6,065		59,421
Commercial real estate lending	104,838		—		15,099		10,888		(2,710)		504		(2,206)		(4,410)		124,209
Total commercial	284,801		294		37,129		17,172		(23,943)		1,397		(22,546)		22,808		339,658
Residential mortgage	33,644		—		790		1,028		(260)		211		(49)		39		35,452
Auto finance	27,470		—		1,346		7,241		(5,838)		2,487		(3,351)		2,059		34,765
Home equity	16,343		—		174		2,058		(92)		782		690		(765)		18,500
Other consumer	15,810		103		73		764		(4,359)		1,104		(3,255)		1,859		15,354
Total consumer	93,267		103		2,383		11,091		(10,549)		4,584		(5,965)		3,192		104,071
Total loans	$	378,068	$	397	$	39,512	$	28,263	$	(34,492)	$	5,981	$	(28,511)	$	26,000	$	443,729
Allowance for unfunded commitments
Commercial and industrial	$	18,698	$	—	$	1,300	$	689	$	—	$	—	$	—	$	(1,650)	$	19,037
Commercial real estate — owner occupied	132		—		18		21		—		—		—		78		249
Commercial and business lending	18,830		—		1,318		710		—		—		—		(1,572)		19,286
Commercial real estate — investor	499		—		102		28		—		—		—		281		910
Real estate construction	17,947		—		2,169		901		—		—		—		5,243		26,260
Commercial real estate lending	18,446		—		2,271		929		—		—		—		5,524		27,170
Total commercial	37,276		—		3,589		1,639		—		—		—		3,952		46,456
Home equity	2,406		—		8		207		—		—		—		49		2,670
Other consumer	1,594		—		—		25		—		—		—		(1)		1,618
Total consumer	4,000		—		8		232		—		—		—		48		4,288
Total loans	$	41,276	$	—	$	3,597	$	1,871	$	—	$	—	$	—	$	4,000	$	50,744
Allowance for credit losses on loans
Commercial and industrial	$	187,334	$	294	$	20,814	$	5,775	$	(21,233)	$	893	$	(20,340)	$	27,455	$	221,332	1.61	%
Commercial real estate — owner occupied	11,459		—		2,534		1,219		—		—		—		(1,809)		13,403		0.85	%
Commercial and business lending	198,793		294		23,348		6,994		(21,233)		893		(20,340)		25,646		234,735		1.53	%
Commercial real estate — investor	58,742		—		11,742		7,618		(2,710)		500		(2,210)		(10,194)		65,698		1.01	%
Real estate construction	64,542		—		5,628		4,199		—		4		4		11,308		85,681		3.37	%
Commercial real estate lending	123,284		—		17,370		11,817		(2,710)		504		(2,206)		1,114		151,379		1.67	%
Total commercial	322,077		294		40,718		18,811		(23,943)		1,397		(22,546)		26,760		386,114		1.58	%
Residential mortgage	33,644		—		790		1,028		(260)		211		(49)		39		35,452		0.52	%
Auto finance	27,470		—		1,346		7,241		(5,838)		2,487		(3,351)		2,059		34,765		0.86	%
Home equity	18,749		—		182		2,265		(92)		782		690		(716)		21,170		2.56	%
Other consumer	17,404		103		73		789		(4,359)		1,104		(3,255)		1,858		16,972		4.01	%
Total consumer	97,267		103		2,391		11,323		(10,549)		4,584		(5,965)		3,240		108,359		0.90	%
Total loans	$	419,344	$	397	$	43,109	$	30,134	$	(34,492)	$	5,981	$	(28,511)	$	30,000	$	494,473	1.36	%

The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2025:

(in thousands)	Dec 31, 2024		Charge offs		Recoveries		Net (Charge offs) Recoveries		Provision for Credit Losses		Dec 31, 2025		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	136,596	$	(14,615)	$	8,357	$	(6,258)	$	38,298	$	168,636
Commercial real estate — owner occupied	9,417		(113)		—		(113)		2,023		11,327
Commercial and business lending	146,013		(14,728)		8,357		(6,371)		40,321		179,963
Commercial real estate — investor	71,547		(21,206)		2,985		(18,221)		4,917		58,243
Real estate construction	51,499		—		154		154		(5,058)		46,595
Commercial real estate lending	123,046		(21,206)		3,139		(18,067)		(141)		104,838
Total commercial	269,060		(35,934)		11,496		(24,438)		40,180		284,801
Residential mortgage	32,576		(1,148)		615		(533)		1,601		33,644
Auto finance	28,467		(8,752)		3,029		(5,723)		4,726		27,470
Home equity	16,620		(416)		999		583		(860)		16,343
Other consumer	16,823		(8,703)		1,837		(6,866)		5,853		15,810
Total consumer	94,486		(19,019)		6,480		(12,539)		11,320		93,267
Total loans	$	363,545	$	(54,953)	$	17,976	$	(36,977)	$	51,500	$	378,068
Allowance for unfunded commitments
Commercial and industrial	$	14,456	$	—	$	—	$	—	$	4,242	$	18,698
Commercial real estate — owner occupied	151		—		—		—		(19)		132
Commercial and business lending	14,607		—		—		—		4,223		18,830
Commercial real estate — investor	578		—		—		—		(79)		499
Real estate construction	19,591		—		—		—		(1,644)		17,947
Commercial real estate lending	20,169		—		—		—		(1,723)		18,446
Total commercial	34,776		—		—		—		2,500		37,276
Home equity	2,465		—		—		—		(59)		2,406
Other consumer	1,535		—		—		—		59		1,594
Total consumer	4,000		—		—		—		—		4,000
Total loans	$	38,776	$	—	$	—	$	—	$	2,500	$	41,276
Allowance for credit losses on loans
Commercial and industrial	$	151,052	$	(14,615)	$	8,357	$	(6,258)	$	42,540	$	187,334	1.59	%
Commercial real estate — owner occupied	9,568		(113)		—		(113)		2,004		11,459		0.97	%
Commercial and business lending	160,620		(14,728)		8,357		(6,371)		44,544		198,793		1.53	%
Commercial real estate — investor	72,125		(21,206)		2,985		(18,221)		4,838		58,742		1.12	%
Real estate construction	71,090		—		154		154		(6,702)		64,542		3.24	%
Commercial real estate lending	143,215		(21,206)		3,139		(18,067)		(1,864)		123,284		1.70	%
Total commercial	303,835		(35,934)		11,496		(24,438)		42,680		322,077		1.59	%
Residential mortgage	32,576		(1,148)		615		(533)		1,601		33,644		0.50	%
Auto finance	28,467		(8,752)		3,029		(5,723)		4,726		27,470		0.88	%
Home equity	19,085		(416)		999		583		(919)		18,749		2.63	%
Other consumer	18,358		(8,703)		1,837		(6,866)		5,912		17,404		5.39	%
Total consumer	98,486		(19,019)		6,480		(12,539)		11,320		97,267		0.89	%
Total loans	$	402,322	$	(54,953)	$	17,976	$	(36,977)	$	54,000	$	419,344	1.35	%

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Goodwill and Other Intangible Assets

6 Months Ended

Jun. 30, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Goodwill

The Corporation conducted its most recent annual impairment testing in May 2026, utilizing a qualitative assessment. Based on this assessment, management concluded that it is more likely than not that the estimated fair value exceeded the carrying value (including goodwill) for each reporting unit. Therefore, a step one quantitative analysis was not required. There have been no events since the May 2026 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in the first six months of 2025 or 2026.

The Corporation added $42.1 million goodwill related to the American National acquisition in the second quarter of 2026. The Corporation had goodwill of $1.1 billion at both June 30, 2026 and December 31, 2025.

Core Deposit Intangibles

The Corporation has CDIs which are amortized. CDI recorded as part of the American National acquisition is amortized over ten years using the sum of digits method while prior acquisitions are amortized under the straight line method. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:

(in thousands)	Six Months Ended Jun 30, 2026		Year Ended Dec 31, 2025
Core deposit intangibles
Gross carrying amount at the beginning of period	$	88,109	$	88,109
Additions during the period	103,200		—
Accumulated amortization	(74,356)		(65,260)
Net book value	$	116,953	$	22,849
Amortization during the period	$	9,096	$	8,811

Mortgage Servicing Rights

A summary of changes in the balance of the MSRs asset under the fair value measurement method is as follows:

(in thousands)	Six Months Ended Jun 30, 2026			Year Ended Dec 31, 2025
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$	86,337		$	87,683
Additions	6,159			8,716
Decay	(4,899)			(8,621)
Valuation:
Changes in fair value of asset	86			(1,441)
Mortgage servicing rights at end of period	$	87,683		$	86,337
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)	$	6,160,254		$	6,191,012
Mortgage servicing rights to servicing portfolio	1.42		%	1.39		%

The projections of amortization expense for CDIs and decay for MSRs are based on existing asset balances, the current interest rate environment, and prepayment speeds as of June 30, 2026. The actual expense the Corporation recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements, and events or circumstances that indicate the carrying amount of an asset may not be recoverable. The following table shows the estimated future yearly amortization expense for CDIs and decay for MSRs:

(in thousands)	Core Deposit Intangibles		Mortgage Servicing Rights
Six Months Ended December 31, 2026	$	13,788	$	4,817
2027	26,167		11,601
2028	18,965		11,838
2029	15,285		11,189
2030	11,788		10,214
2031	9,851		9,123
Beyond 2031	21,109		28,901
Total estimated amortization expense and MSRs decay(a)	$	116,953	$	87,683

(a) Includes the decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns.

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Short and Long-Term Funding

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Short and Long-Term Funding

Short and Long-Term Funding

The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year):

(in thousands)	June 30, 2026		December 31, 2025
Short-term funding
Federal funds purchased	$	473,905	$	260,070
Securities sold under agreements to repurchase	55,371		47,794
Federal funds purchased and securities sold under agreements to repurchase	$	529,276	$	307,864
Long-term funding
Corporation senior notes, at par	$	300,000	$	300,000
Corporation subordinated notes, at par	300,000		300,000
Discount and capitalized costs	(6,895)		(7,484)
Subordinated debt fair value hedge(a)	(2,025)		1,760
Total long-term funding	$	591,080	$	594,276
Total short and long-term funding, excluding FHLB advances	$	1,120,356	$	902,140
FHLB advances
Short-term FHLB advances	$	4,315,000	$	2,855,250
Long-term FHLB advances	263,115		414,122
FHLB advances fair value hedge(a)	(3,434)		(1,278)
Total FHLB advances	$	4,574,681	$	3,268,094
Total short and long-term funding	$	5,695,037	$	4,170,234

(a) For additional information on the fair value hedges, see Note 10.

Securities Sold Under Agreements to Repurchase

The Corporation enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Corporation may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Corporation to repurchase the assets. The obligation to repurchase the securities is reflected as a liability on the Corporation’s consolidated balance sheets, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts (i.e., there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities).

The Corporation utilizes repurchase agreements to facilitate the needs of its customers. The fair value of securities pledged to secure repurchase agreements may decline. At June 30, 2026, the Corporation had pledged securities valued at 202% of the gross outstanding balance of repurchase agreements to manage this risk.

The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets is presented in the following table:

	Overnight and Continuous
(in thousands)	June 30, 2026		December 31, 2025
Repurchase agreements
Agency mortgage-related securities	$	55,371	$	47,794

Long-Term Funding

Senior Notes

In August 2024, the Corporation issued $300.0 million in aggregate principal amount of 6.455% Fixed Rate / Floating Rate Senior Notes due August 29, 2030. During the period from, and including, August 29, 2024, to, but excluding, August 29, 2029, the senior notes will have a fixed coupon interest rate of 6.455% per annum, payable semi-annually in arrears. During the period from, and including, August 29, 2029, to, but excluding, the maturity date, the senior notes will have a floating rate per annum equal to Compounded SOFR, as defined in the Global Note issued in connection with the senior notes, plus 3.030%, payable quarterly in arrears. Prior to August 29, 2029, the Corporation may, at its option, redeem the senior notes, in whole or in part, at any time and from time to time, by paying the redemption price, as defined in the Global Note issued in connection with the senior notes, plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. On August 29, 2029, the Corporation may at its option, redeem the senior notes, in whole, but not in part, by paying the aggregate principal amount of the notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. At any time and from time to time on or after July 30, 2030 (30 days prior to the maturity date), the Corporation may, at its option,

redeem the senior notes in whole or in part by paying the aggregate principal amount of the senior notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. The senior notes were issued at a discount.

Subordinated Notes 

In February 2023, the Corporation issued $300.0 million of 10-year subordinated notes, due March 1, 2033 and redeemable in whole or in part at the Corporation's option (i) on the reset date of March 1, 2028 and any interest payment date thereafter, (ii) at any time on or after the three month period prior to the maturity date, and (iii) upon the occurrence of a Regulatory Capital Treatment Event, as defined in the Global Note issued in connection with the subordinated notes. The subordinated notes have a fixed coupon interest rate of 6.625% until the reset date, after which the rate will be equal to the Five-Year U.S. Treasury Rate as of the reset date plus 2.812% per annum. The notes were issued at a discount.

FHLB Advances

Under agreements with the FHLB of Chicago, FHLB advances are secured by pledging qualifying collateral of the subsidiary bank (such as residential mortgage loans, residential mortgage loans held for sale, home equity loans, CRE loans, and investment securities). The FHLB advances had maturity or call dates ranging from 2026 through 2031 at June 30, 2026.

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Derivative and Hedging Activities

6 Months Ended

Jun. 30, 2026

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

Derivative and Hedging Activities

The Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future known and uncertain cash amounts, the value of which are determined by interest and currency rates as well as other economic conditions.

At inception, the Corporation designates the derivative contract as either a fair value hedge (i.e., a hedge of the fair value of a recognized asset or liability), a cash flow hedge (i.e., a hedge of the variability of cash flows to be received or paid related to a recognized asset or liability), or a non-designated hedge. The hedge accounting methodologies applied for fair value, cash flow, and non-designated hedges are described in the Derivative and Hedging Activities note in the Corporation's 2025 Annual Report on Form 10-K.

The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. The Corporation is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. To mitigate the counterparty risk, contracts generally contain language outlining collateral pledging requirements for each counterparty. For non-centrally cleared derivatives, collateral must be posted when the market value exceeds certain mutually agreed upon threshold limits. Securities and cash are often pledged as collateral. The Corporation pledged $73.8 million and $79.4 million of investment securities as collateral at June 30, 2026, and December 31, 2025, respectively. Cash is often pledged or received as collateral for derivatives that are not centrally cleared. The Corporation's cash collateral pledged was $3.5 million at June 30, 2026 and $11.8 million at December 31, 2025. For fair value information and disclosures and for the Corporation's accounting policy for derivative and hedging activities, see the Fair Value Measurements and Summary of Significant Accounting Policies notes in the Corporation's 2025 Annual Report on Form 10-K.

The following table presents the total notional amounts and gross fair values of the Corporation's derivatives, as well as the balance sheet netting adjustments:

	Jun 30, 2026								Dec 31, 2025
	Asset				Liability				Asset				Liability
(in thousands)	Notional Amount		Fair Value		Notional Amount		Fair Value		Notional Amount		Fair Value		Notional Amount		Fair Value
Designated as hedging instruments:
Interest rate-related instruments(a)	$	1,150,000	$	1,435	$	1,650,000	$	6,737	$	2,425,000	$	10,517	$	25,000	$	1
Foreign currency exchange forwards	48,307		1,355		269,686		303		280,159		757		38,384		194
Total designated as hedging instruments			2,790				7,040				11,274				195
Not designated as hedging instruments:
Interest rate-related and other instruments	5,496,857		61,693		6,553,249		111,446		4,775,818		66,787		7,072,274		108,631
Foreign currency exchange forwards	65,014		440		13,535		198		48,904		1,731		43,787		1,517
Mortgage banking(b)	68,998		1,432		141,000		397		39,998		814		107,000		444
Total not designated as hedging instruments			63,565				112,041				69,332				110,592
Gross derivatives before netting			66,355				119,081				80,606				110,787
Less: Legally enforceable master netting agreements			9,343				9,343				12,839				12,839
Less: Cash collateral pledged/received			17,769				720				10,343				8,334
Total derivative instruments, after netting			$	39,243			$	109,018			$	57,424			$	89,614

(a) The notional amounts of the interest rate-related instruments designated as hedging instruments include forward starting interest rate swaps. As of June 30, 2026, this includes swaps with an effective dates of November 1, 2026 to December 1, 2026 that had an asset notational and fair value of $100.0 million and $0.2 million, respectively, and a liability notional amount and fair value of $250.0 million and $1.5 million, respectively. As of December 31, 2025, the Corporation did not have any forward starting interest rate-swaps.
(b) The mortgage derivative asset includes interest rate lock commitments, while the mortgage derivative liability includes forward commitments. Given the fair value position as of June 30, 2026, the fair value of the mortgage derivative asset included $1.4 million of interest rate lock commitments and the derivative liability included $0.4 million of forward commitments. Given the fair value position as of December 31, 2025, the fair value of the mortgage derivative asset included $0.8 million of interest rate lock commitments and the derivative liability included $0.4 million of forward commitments.

The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges:

	Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included
	Carrying Amount of the Hedged Assets/(Liabilities)(a)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		Carrying Amount of the Hedged Assets/(Liabilities)(a)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
(in thousands)	Jun 30, 2026				Dec 31, 2025
Other long-term funding	$	(297,975)	$	2,025	$	(301,760)	$	(1,760)
FHLB Advances	(196,566)		3,434		(198,722)		1,278
Total	$	(494,541)	$	5,459	$	(500,482)	$	(482)

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At June 30, 2026 and December 31, 2025, the carrying amount excluded for foreign currency denominated loans was $318.0 million and $318.5 million, respectively.

The Corporation terminated its $500.0 million fair value hedge during the fourth quarter of 2019. At June 30, 2026, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $151.4 million and is included in loans on the consolidated balance sheets. This amount includes $0.7 million of hedging adjustments on the discontinued hedging relationships, which are not presented in the table above.

The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income:

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value and Cash Flow Hedging Relationships
	Three Months Ended Jun 30,								Six Months Ended Jun 30,
	2026				2025				2026				2025
(in thousands)	Interest Income		Interest (Expense)		Interest Income		Interest (Expense)		Interest Income		Interest (Expense)		Interest Income		Interest (Expense)
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded(a)	$	565	$	(380)	$	(1,464)	$	(1,942)	$	1,169	$	(777)	$	(2,614)	$	(4,160)
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items	(31)		2,952		(27)		(4,099)		(174)		5,942		(58)		(11,096)
Derivatives designated as hedging instruments(a)	597		(3,332)		(1,437)		2,158		1,343		(6,719)		(2,555)		6,936

(a) Includes net settlements on the derivatives.

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value Hedging Relationships
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
	2026		2025		2026		2025
(in thousands)	Capital Markets, Net		Capital Markets, Net		Capital Markets, Net		Capital Markets, Net
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded	$	51	$	—	$	53	$	1
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items	(13,163)		19,542		(18,086)		20,095
Derivatives designated as hedging instruments	13,214		(19,542)		18,139		(20,093)

The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss):

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivatives(a)	$	(6,506)	$	1,264	$	(14,418)	$	8,532
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)	(597)		1,437		(1,343)		2,555

(a) The entirety of gains (losses) recognized in OCI as well as those reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness.

Amounts reported in accumulated other comprehensive income (loss) related to cash flow hedge derivatives are reclassified to interest income as interest payments are made on the hedged variable interest rate assets. The Corporation estimates that $3.1 million will be reclassified as a decrease to interest income over the next 12 months. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, or the addition of other hedges subsequent to June 30, 2026. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 41 months as of June 30, 2026.

The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income:

	Consolidated Statements of Income Category of Gain / (Loss)  Recognized in Income	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)		2026		2025		2026		2025
Derivative instruments
Interest rate-related and other instruments — customer and mirror, net	Capital markets, net	$	(1)	$	(42)	$	(31)	$	(90)
Interest rate-related instruments — MSRs hedge	Mortgage banking, net	(420)		(308)		(219)		1,158
Foreign currency exchange forwards	Capital markets, net	202		(1,075)		642		(575)
Interest rate lock commitments (mortgage)	Mortgage banking, net	595		933		617		1,594
Forward commitments (mortgage)	Mortgage banking, net	(1,339)		(779)		46		(1,616)

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Balance Sheet Offsetting

6 Months Ended

Jun. 30, 2026

Offsetting [Abstract]

Additional Financial Information Disclosure [Text Block]

Balance Sheet Offsetting

Interest Rate-Related Instruments and Foreign Exchange Forwards (“Interest and Foreign Exchange Agreements”)

The Corporation is permitted to present derivative receivables and derivative payables with the same counterparty and the related cash collateral receivables and payables on a net basis on the consolidated balance sheets when a legally enforceable master netting agreement exists. The Corporation has elected to net such balances where it has determined that the specified conditions are met.

The Corporation uses master netting agreements to mitigate counterparty credit risk in these transactions, including derivative contracts. A master netting agreement is a single agreement with a counterparty that permits multiple transactions governed by that agreement to be terminated or accelerated and settled through a single payment in a single currency in the event of a default (e.g., bankruptcy, failure to make a required payment or securities transfer, or failure to deliver collateral or margin when due).

Typical master netting agreements for these types of transactions also contain a collateral/margin agreement that provides for a security interest in, or title transfer of, securities or cash collateral/margin to the party that has the right to demand margin (the "demanding party"). The collateral/margin agreement typically requires a party to transfer collateral/margin to the demanding party with a value equal to the amount of the margin deficit on a net basis across all transactions governed by the master netting agreement, less any threshold. The collateral/margin agreement grants to the demanding party, upon default by the counterparty, the right to offset any amounts payable by the counterparty against any posted collateral or the cash equivalent of any posted collateral/margin. It also grants to the demanding party the right to liquidate collateral/margin and to apply the proceeds to an amount payable by the counterparty.

For additional information on the Corporation’s derivative and hedging activities, see the Derivative and Hedging Activities note in the Corporation's 2025 Annual Report on Form 10-K.

The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Liabilities Offset		Cash Collateral Received				Security Collateral Received		Net Amount
Derivative assets
June 30, 2026	$	48,451	$	(9,343)	$	(17,769)	$	21,339	$	(17,912)	$	3,427
December 31, 2025	42,468		(12,839)		(10,343)		19,286		(18,131)		1,155

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Assets Offset		Cash Collateral Pledged				Security Collateral Pledged		Net  Amount
Derivative liabilities
June 30, 2026	$	15,109	$	(9,343)	$	(720)	$	5,046	$	—	$	5,046
December 31, 2025	23,006		(12,839)		(8,334)		1,833		—		1,833

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Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters

Commitments, Off-Balance Sheet Arrangements, and Legal Proceedings

The Corporation utilizes a variety of financial instruments in the normal course of business to meet the financial needs of its customers and to manage its own exposure to fluctuations in interest rates. These financial instruments include lending-related and other commitments (see below) as well as derivative instruments (see Note 10). The following is a summary of lending-related commitments:

(in thousands)	Jun 30, 2026		Dec 31, 2025
Commitments to extend credit(a), excluding commitments to originate residential mortgage loans held for sale(b)	$	13,006,388	$	11,872,816
Commercial letters of credit(a)	589		425
Standby letters of credit(c)	252,770		222,047

(a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at June 30, 2026 or December 31, 2025.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2.4 million at June 30, 2026 and $2.2 million at December 31, 2025, as an estimate of the fair value of these financial instruments.

Lending-related Commitments

As a financial services provider, the Corporation routinely enters into commitments to extend credit. Such commitments are subject to the same credit policies and approval process accorded to loans made by the Corporation, with each customer’s creditworthiness evaluated on a case-by-case basis. The commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to these financial instruments is represented by the contractual amount of those instruments. The amount of collateral obtained, if deemed necessary by the Corporation upon extension of credit, is based on management’s credit evaluation of the customer. Since a significant portion of commitments to extend credit are subject to specific restrictive loan covenants or may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. An allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded commitments (including unfunded loan commitments and letters of credit).

The following table presents a summary of the changes in the allowance for unfunded commitments:

(in thousands)	Six Months Ended Jun 30, 2026		Year Ended Dec 31, 2025
Allowance for unfunded commitments
Balance at beginning of period	$	41,276	$	38,776
Initial allowance for PCD unfunded commitments	3,597		—
Initial allowance for purchased seasoned unfunded commitments	1,871		—
Provision for unfunded commitments	4,000		2,500
Balance at end of period	$	50,744	$	41,276

Lending-related commitments include commitments to extend credit, commitments to originate residential mortgage loans held for sale, commercial letters of credit, and standby letters of credit. Commitments to extend credit are legally binding agreements to lend to customers at predetermined interest rates, as long as there is no violation of any condition established in the contracts. Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments is recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s derivative and hedging activity is further described in Note 10. Commercial and standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party, while standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party.

Other Commitments

The Corporation invests in qualified affordable housing projects, historic projects, new market projects, and opportunity zone funds for the purpose of community reinvestment and obtaining tax credits and other tax benefits. Return on the Corporation's investment in these projects and funds comes in the form of the tax credits and tax losses that pass through to the Corporation.

The aggregate carrying value of investments in qualified affordable housing and historic projects at June 30, 2026 was $161.3 million, compared to $174.3 million at December 31, 2025, included in tax credit and other investments on the consolidated balance sheets. The Corporation's remaining investments accounted for under the proportional amortization method totaled $160.0 million at June 30, 2026 and $172.2 million at December 31, 2025.

Under the proportional amortization method, the Corporation amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. The following table summarizes income tax credits, other income tax benefits, and investment amortization generated from the Corporation's investments in these projects, which are recognized as a component within income tax expense on the consolidated statements of income and included in the change in net income tax position and amortization of tax credit investments on the consolidated statements of cash flows:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Income tax credits and other income tax benefits recognized	$	10,406	$	10,772	$	19,543	$	20,230
Amortization expense	8,692		8,369		17,146		17,058

The Corporation’s unfunded contributions relating to investments in qualified affordable housing and historic projects are recorded in accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s remaining unfunded contributions totaled $22.5 million at June 30, 2026 and $22.8 million at December 31, 2025.

For the three and six months ended June 30, 2026 and 2025, the Corporation recorded impairment of $0.9 million related to qualified affordable housing investments and historic tax credits which was recognized through asset gains (losses), net on the consolidated statements of income and included in the net change in other assets and liabilities on the consolidated statements of cash flows.

The Corporation has principal investment commitments to provide capital-based financing to private companies through either direct investment in specific companies or through investment funds and partnerships. The timing of future cash requirements to fund such principal investment commitments is generally dependent on the investment cycle, whereby privately held companies are funded by private equity investors and ultimately sold, merged, or taken public through an initial public offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The timing of future cash requirements to fund these pools is dependent upon loan demand, which can vary over time. The aggregate carrying value of these investments was $74.3 million at June 30, 2026 and $62.3 million at December 31, 2025, included in tax credit and other investments on the consolidated balance sheets.

Legal Proceedings

The Corporation is party to various pending and threatened claims and legal proceedings arising in the normal course of business activities, some of which involve claims for substantial amounts. Although there can be no assurance as to the ultimate outcomes, the Corporation believes it has meritorious defenses to the claims asserted against it in its currently outstanding matters and intends to continue to defend itself vigorously with respect to such legal proceedings. The Corporation will consider settlement of cases when, in management’s judgment, it is in the best interests of the Corporation and its shareholders.

Management believes that the legal proceedings currently pending against it should not have a material adverse effect on the Corporation’s consolidated financial condition. However, in light of the uncertainties involved in such proceedings, there is no assurance that the ultimate resolution of these matters will not significantly exceed the reserves the Corporation has currently accrued or that a matter will not have material reputational or other qualitative consequences. As a result, the outcome of a particular matter may be material to the Corporation’s operating results for a particular period, depending on, among other factors, the size of the loss or liability imposed and the level of the Corporation’s income for that period.

Mortgage Repurchase Reserve

The Corporation sells residential mortgage loans to investors in the normal course of business. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages originated under the Corporation's usual underwriting procedures, and are most often sold on a nonrecourse basis, primarily to the GSEs. The Corporation’s agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold, related to credit information, loan documentation, collateral, and insurability. Subsequent to being sold, if a material underwriting deficiency or documentation defect is discovered, the Corporation may be obligated to repurchase the loan or reimburse the GSEs for losses incurred (collectively, “make whole requests”). The make whole requests and any related risk of loss under the representations and warranties are largely driven by borrower performance. The Corporation also sells qualifying residential mortgage loans guaranteed by U.S. government agencies into GNMA pools.

As a result of make whole requests, the Corporation has repurchased loans with aggregate principal balances of $2.9 million and $3.5 million for the six months ended June 30, 2026 and the year ended December 31, 2025, respectively. There were no loss reimbursement and settlement claims paid in the six months ended June 30, 2026 or for the year ended December 31, 2025. Make whole requests since January 1, 2025 generally arose from loans originated since January 1, 2022 with balances totaling $4.3 billion at the time of sale, consisting primarily of loans sold to GSEs. As of June 30, 2026, $2.0 billion of those loans originated since January 1, 2022 remain outstanding.

The balance in the mortgage repurchase reserve at the balance sheet date reflects the estimated amount of potential loss the Corporation could incur from repurchasing a loan, as well as loss reimbursements, indemnifications, and other settlement resolutions. The mortgage repurchase reserve, included in accrued expenses and other liabilities on the consolidated balance sheets, was $0.4 million at June 30, 2026 and $0.3 million at December 31, 2025.

The Corporation may also sell residential mortgage loans with limited recourse (limited in that the recourse period ends prior to the loan’s maturity, usually after certain time and/or loan paydown criteria have been met), whereby repurchase could be required if the loan had defined delinquency issues during the limited recourse periods. At June 30, 2026 and December 31, 2025, there were $12.2 million and $11.4 million, respectively, of residential mortgage loans sold with such recourse risk. There have been limited instances and immaterial historical losses on repurchases for recourse under the limited recourse criteria.

The Corporation has a subordinate position to the FHLB in the credit risk on residential mortgage loans it sold to the FHLB Mortgage Partnership Finance Traditional program in exchange for a monthly credit enhancement fee. At June 30, 2026 and December 31, 2025, there were $365.8 million and $273.4 million, respectively, of such residential mortgage loans with credit risk recourse, upon which there have been immaterial historical losses to the Corporation.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2026

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Fair value represents the estimated price at which an orderly transaction to sell an asset or to transfer a liability would take place between market participants at the measurement date under current market conditions (i.e., an exit price concept).

The valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis are described in the Fair Value Measurements note in the Corporation’s 2025 Annual Report on Form 10-K, as well as Note 3 Business Combinations.

The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments, aggregated by the level in the fair value hierarchy within which those measurements fall:

	Jun 30, 2026
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	548,057	$	548,057	$	548,057	$	—	$	—
Interest-bearing deposits in other financial institutions	1,268,379		1,268,379		1,268,379		—		—
Federal funds sold and securities purchased under agreements to resell	14,355		14,355		14,355		—		—
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)	7,240		7,240		—		7,240		—
Residential mortgage-related securities:
FNMA / FHLMC	137,288		137,288		—		137,288		—
GNMA	5,491,648		5,491,648		—		5,491,648		—
Commercial mortgage-related securities:
FNMA / FHLMC	410,221		410,221		—		410,221		—
GNMA	106,844		106,844		—		106,844		—
Asset backed securities:
FFELP	88,212		88,212		—		88,212		—
SBA	120,070		120,070		—		120,070		—
Other debt securities(b)	5,063		5,063		—		3,000		2,063
Total AFS investment securities	6,366,586		6,366,586		—		6,364,523		2,063
HTM investment securities:
U.S. Treasury securities	997		1,002		1,002		—		—
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,468,604		—		1,468,604		—
Residential mortgage-related securities:
FNMA / FHLMC	790,729		660,737		—		660,737		—
GNMA	37,215		34,626		—		34,626		—
Private-label	292,007		246,460		—		246,460		—
Commercial mortgage-related securities:
FNMA / FHLMC	757,723		644,300		—		644,300		—
GNMA	40,423		36,089		—		36,089		—
Total HTM investment securities	3,510,775		3,091,818		1,002		3,090,816		—
Equity securities:
Equity securities	14,960		14,960		14,960		—		—
Equity securities at NAV	15,000		15,000
Total equity securities	29,960		29,960
Regulatory stocks	329,436		329,436		—		329,436		—
Residential loans held for sale	94,490		94,490		—		94,490		—
Commercial loans held for sale	15,000		15,000		—		15,000		—
Loans, net	35,976,291		35,021,793		—		—		35,021,793
Bank and corporate owned life insurance	717,116		717,116		—		717,116		—
Mortgage servicing rights, net	87,683		87,683		—		—		87,683
Interest rate-related instruments designated as hedging instruments(a)	1,435		1,435		—		1,435		—
Foreign currency exchange forwards designated as hedging instruments(a)	1,355		1,355		—		1,355		—
Interest rate-related and other instruments not designated as hedging instruments(a)	61,693		61,693		—		61,693		—
Foreign currency exchange forwards not designated as hedging instruments(a)	440		440		—		440		—
Interest rate lock commitments to originate residential mortgage loans held for sale	1,432		1,432		—		—		1,432
Total selected assets at fair value	$	49,024,483	$	47,651,028	$	1,846,753	$	10,676,304	$	35,112,971

(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

(b) The quantifiable unobservable input for fair value measurement of the Level 3 classified security is externally developed.

	Jun 30, 2026
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Brokered CDs	$	3,933,787	$	3,923,505	$	—	$	3,923,505	$	—
Other time deposits	4,782,343		4,771,175		—		4,771,175		—
Federal funds purchased and securities sold under agreements to repurchase	529,276		529,276		529,276		—		—
FHLB advances	4,574,681		4,568,111		—		4,568,111		—
Senior and subordinated debt	591,080		589,506		—		589,506		—
Standby letters of credit(a)	2,365		2,365		—		2,365		—
Interest rate-related instruments designated as hedging instruments(b)	6,737		6,737		—		6,737		—
Foreign currency exchange forwards designated as hedging instruments(b)	303		303		—		303		—
Interest rate-related and other instruments not designated as hedging instruments(b)	111,446		111,446		—		111,446		—
Foreign currency exchange forwards not designated as hedging instruments(b)	198		198		—		198		—
Forward commitments to sell residential mortgage loans	397		397		—		—		397
Total selected liabilities at fair value	$	14,532,613	$	14,503,019	$	529,276	$	13,973,346	$	397

(a) The commitment on standby letters of credit was $252.8 million at June 30, 2026. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

	Dec 31, 2025
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	574,698	$	574,698	$	574,698	$	—	$	—
Interest-bearing deposits in other financial institutions	1,144,123		1,144,123		1,144,123		—		—
Federal funds sold and securities purchased under agreements to resell	1,400		1,400		1,400		—		—
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)	3,044		3,044		—		3,044		—
Residential mortgage-related securities:
FNMA / FHLMC	129,863		129,863		—		129,863		—
GNMA	5,039,829		5,039,829		—		5,039,829		—
Commercial mortgage-related securities:
FNMA / FHLMC	16,958		16,958		—		16,958		—
GNMA	109,556		109,556		—		109,556		—
Asset backed securities:
FFELP	95,046		95,046		—		95,046		—
SBA	269		269		—		269		—
Other debt securities	2,998		2,998		—		2,998		—
Total AFS investment securities	5,397,563		5,397,563		—		5,397,563		—
HTM investment securities:
U.S. Treasury securities	996		1,015		1,015		—		—
Obligations of state and political subdivisions (municipal securities)	1,628,088		1,507,302		—		1,507,302		—
Residential mortgage-related securities:
FNMA / FHLMC	823,630		696,462		—		696,462		—
GNMA	39,123		36,884		—		36,884		—
Private-label	302,817		258,827		—		258,827		—
Commercial mortgage-related securities:
FNMA / FHLMC	763,370		650,366		—		650,366		—
GNMA	44,552		40,138		—		40,138		—
Total HTM investment securities	3,602,576		3,190,994		1,015		3,189,979		—
Equity securities:
Equity securities	11,060		11,060		11,060		—		—
Equity securities at NAV	15,000		15,000
Total equity securities	26,060		26,060
Regulatory stocks	252,514		252,514		—		252,514		—
Residential loans held for sale	72,499		72,499		—		72,499		—
Loans, net	30,766,886		29,970,788		—		—		29,970,788
Bank and corporate owned life insurance	694,452		694,452		—		694,452		—
Mortgage servicing rights, net	86,337		86,337		—		—		86,337
Interest rate-related instruments designated as hedging instruments(a)	10,517		10,517		—		10,517		—
Foreign currency exchange forwards designated as hedging instruments(a)	757		757		—		757		—
Interest rate-related and other instruments not designated as hedging instruments(a)	66,787		66,787		—		66,787		—
Foreign currency exchange forwards not designated as hedging instruments(a)	1,731		1,731		—		1,731		—
Interest rate lock commitments to originate residential mortgage loans held for sale	814		814		—		—		814
Total selected assets at fair value	$	42,699,714	$	41,492,034	$	1,732,296	$	9,686,799	$	30,057,939

(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

	Dec 31, 2025
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Brokered CDs	$	3,795,133	$	3,791,245	$	—	$	3,791,245	$	—
Other time deposits	4,041,178		4,035,549		—		4,035,549		—
Federal funds purchased and securities sold under agreements to repurchase	307,864		307,864		307,864		—		—
FHLB advances	3,268,094		3,267,836		—		3,267,836		—
Senior and subordinated debt	594,276		598,141		—		598,141		—
Standby letters of credit(a)	2,225		2,225		—		2,225		—
Interest rate-related instruments designated as hedging instruments(b)	1		1		—		1		—
Foreign currency exchange forwards designated as hedging instruments(b)	194		194		—		194		—
Interest rate-related and other instruments not designated as hedging instruments(b)	108,631		108,631		—		108,631		—
Foreign currency exchange forwards not designated as hedging instruments(b)	1,517		1,517		—		1,517		—
Forward commitments to sell residential mortgage loans	444		444		—		—		444
Total selected liabilities at fair value	$	12,119,557	$	12,113,647	$	307,864	$	11,805,339	$	444

(a) The commitment on standby letters of credit was $222.0 million at December 31, 2025. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

The table below presents a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage derivatives measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy:

(in thousands)	Interest rate lock commitments to originate residential mortgage loans held for sale		Forward commitments to sell residential mortgage loans
Balance December 31, 2024	$	327	$	(254)
New production	13,435		(3,998)
Closed loans / settlements	(13,690)		2,738
Other	742		1,958
Change in mortgage derivative	487		698
Balance December 31, 2025	814		444
New production	7,629		(2,240)
Closed loans / settlements	(6,308)		2,910
Other	(703)		(717)
Change in mortgage derivative	618		(47)
Balance June 30, 2026	$	1,432	$	397

Refer to Note 8 for a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage servicing rights measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy.

The following table presents a rollforward of the fair value of Level 3 equity securities that are measured under the measurement alternative, and the related adjustments recorded during the periods presented for those securities with observable price changes:

(in thousands)
Fair value as of December 31, 2024	$	72
Purchases	14
Sales	(23)
Transfers out of level 3	(63)
Fair value as of December 31, 2025	$	—

The Corporation did not have any activity for Level 3 equity securities for the six months ended June 30, 2026.

The Corporation acquired a Level 3 AFS debt security upon the acquisition of American National on April 1, 2026. The security was valued at $2.1 million and no related adjustments to fair value have been recorded as of June 30, 2026.

The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall:

		Fair Value
(in thousands)	Fair Value Hierarchy	June 30, 2026		December 31, 2025
Assets
Individually evaluated loans	Level 3	$	48,296	$	18,659
OREO(a)	Level 2	1,397		770

(a) These assets are held at lower of its carrying amount or fair value less cost to sell. Assets included here are those that were adjusted to fair value less cost to sell during the period.

The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements:

June 30, 2026	Valuation Technique	Significant Unobservable Input	Range of Inputs			Weighted Average Input Applied
Mortgage servicing rights	Discounted cash flow	Option adjusted spread	5%	-	8%	5%
Mortgage servicing rights	Discounted cash flow	Constant prepayment rate	—%	-	100%	8%
Individually evaluated loans	Discounted cash flow	Discount factor	45%	-	45%	45%
Individually evaluated loans	Market approach	Appraisal / Cost to sell	44%	-	80%	53%
Interest rate lock commitments to originate residential mortgage loans held for sale	Discounted cash flow	Closing ratio	70%	-	100%	92%

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Retirement Plans

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

Retirement Plans

Retirement Plans

The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefit allocations are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. As part of acquisition-related integration activities, employees who become eligible for participation in the RAP are generally provided service credit for their employment with the acquired institution for eligibility and vesting purposes.

The Corporation also provides legacy healthcare access to a limited group of retired employees from a previous acquisition in the Postretirement Plan. There are no other active retiree healthcare plans.

The components of net periodic pension benefit and net periodic cost for the RAP and Postretirement Plan were as follows:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
RAP
Service cost	$	869	$	810	$	1,737	$	1,619
Interest cost	2,749		2,814		5,499		5,628
Expected return on plan assets	(9,772)		(9,809)		(19,544)		(19,619)
Amortization of prior service credit	(44)		(44)		(89)		(89)
Total net periodic pension benefit	$	(6,198)	$	(6,230)	$	(12,397)	$	(12,460)
Postretirement Plan
Interest cost	$	22	$	26	$	43	$	53
Amortization of prior service credit	(19)		(19)		(38)		(38)
Amortization of actuarial loss	—		4		—		8
Total net periodic cost	$	3	$	12	$	6	$	23

The components of net periodic pension benefit and net periodic cost, other than the service cost component, are included in the other noninterest expense caption of the consolidated statements of income. The service cost component is included in the personnel noninterest expense caption of the consolidated statements of income.

The Corporation’s funding policy is to pay at least the minimum amount required by federal law and regulations, with consideration given to the maximum funding amounts allowed. The Corporation regularly reviews the funding of its RAP. There were no contributions during the six months ended June 30, 2026 or 2025.

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Segment Reporting

3 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting

The Corporation is managed through operating segments based on our internal structure and management process, which is how we assess performance and allocate resources to the segments. Certain operating segments have been aggregated into our three reportable segments where the nature of the products and services, the type of customer, and the distribution of those products and services are similar. The three reportable segments are Corporate and Commercial Specialty; Community, Consumer, and

Business; and Risk Management and Shared Services. A description of the products and services and the related customers for each reportable segment can be found in the Segment Reporting note in the Corporation’s 2025 Annual Report on Form 10-K.

Effective beginning the first quarter of 2026, the Corporation made adjustments to both its FTP and expense allocation of shared services to its reportable segments to better align with how management assesses performance and allocates resources. These changes consisted of updates to the FTP methodology, including revisions to the funding curve and deposit assumptions; reassignment of certain branch locations based on the primary business activities supported by those branches; and revisions to the allocation of shared service expenses. The Corporation has recast prior period segment information to conform to the current period presentation.

The financial information of the Corporation’s segments disclosed below has been compiled utilizing the accounting policies described in the Corporation’s 2025 Annual Report on Form 10-K with certain exceptions based on internal management accounting policies. The significant exceptions are as follows:

The Corporation allocates certain net interest income, the provision for credit losses, certain noninterest expenses, and income taxes to each operating segment. Allocation methodologies are subject to periodic adjustment as the internal management accounting system is revised, the interest rate environment evolves, and business or product lines within the segments change. Also, because the development and application of these methodologies is a dynamic process, the financial results presented may be periodically reviewed.

The Corporation allocates certain net interest income using an internal FTP methodology that charges users of funds (assets, primarily loans) and credits providers of funds (liabilities, primarily deposits) based on the funding curve, maturity, prepayment, and other characteristics of the assets and liabilities. This allocation is reflected as net intersegment interest income (expense) in the accompanying tables.

The provision for credit losses is allocated to segments based on the expected long-term annual net charge off rates attributable to the credit risk of loans managed by the segment during the period. In contrast, the level of the consolidated provision for credit losses is determined based on an ACLL model using methodologies described in the Corporation’s 2025 Annual Report on Form 10-K.

The net effect of the above allocations is recorded within the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's consolidated financial information.

Indirect expenses incurred by the Corporation's centralized support functions - including facilities, information technology, finance, and corporate risk management - are allocated to reportable segments based on actual usage, such as transaction volumes or FTEs, as well as other relevant drivers that reflect consumption of those services. Because these allocations are based on estimated activity levels, individual period results may reflect variability in the distribution of indirect expenses among segments. Certain corporate-level expenses, including acquisition-related costs, integration expenses, and gains or losses on the disposition of branches or business units, are not allocated and remain in the Risk Management and Shared Services segment. These allocations are reflected as allocated indirect expense in the accompanying tables.

Income tax expense (benefit) is allocated to segments based on the Corporation’s estimated effective tax rate, with certain segments adjusted for any tax-exempt income or non-deductible expenses.

Financial information about the Corporation’s segments is presented below:

	Three Months Ended June 30, 2026
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income	$	267,324	$	86,481	$	16,234	$	370,039
Net intersegment interest (expense) income	(105,641)		136,046		(30,405)		—
Net interest income (expense)	161,683		222,527		(14,171)		370,039
Noninterest income	15,648		56,437		8,313		80,398
Total income (expense) before provision	177,331		278,964		(5,858)		450,437
Provision for credit losses	21,287		6,456		(8,355)		19,388
Total income after provision	156,044		272,508		2,497		431,049
Noninterest expense
Personnel	24,595		65,456		71,117		161,168
Technology(a)	1,293		13,853		17,721		32,867
Occupancy(a)	255		8,405		5,431		14,091
Business development and advertising	1,128		839		6,581		8,548
Equipment(a)	6		2,319		3,098		5,423
Legal and professional	272		1,478		15,704		17,454
Loan and foreclosure costs	233		1,296		23		1,552
FDIC assessment	—		—		10,595		10,595
Other intangible amortization	—		—		6,894		6,894
Other noninterest expense	1,087		10,376		1,827		13,290
Allocated indirect expense (income)	29,531		70,523		(100,054)		—
Total noninterest expense	58,400		174,545		38,937		271,882
Net income (loss) before income taxes	97,644		97,963		(36,440)		159,167
Income tax expense	17,567		20,676		(2,640)		35,603
Net income (loss)	$	80,077	$	77,287	$	(33,800)	$	123,564
Loans	$	21,736,674	$	14,231,238	$	499,128	$	36,467,040
Allocated goodwill	556,343		590,738		—		1,147,081
Total assets	22,552,085		15,452,018		13,808,403		51,812,506

(a) A portion of total depreciation expense of $0.2 million, $6.3 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

	Three Months Ended June 30, 2025
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income (expense)	$	242,978	$	68,871	$	(11,849)	$	300,000
Net intersegment interest (expense) income	(107,337)		143,478		(36,141)		—
Net interest income (expense)	135,641		212,349		(47,990)		300,000
Noninterest income	11,984		51,481		3,512		66,977
Total income (expense) before provision	147,625		263,830		(44,478)		366,977
Provision for credit losses	20,369		6,363		(8,736)		17,996
Total income (expense) after provision	127,256		257,467		(35,742)		348,981
Noninterest expense
Personnel	20,149		56,641		50,204		126,994
Technology(a)	842		12,903		12,763		26,508
Occupancy(a)	190		7,386		5,068		12,644
Business development and advertising	1,252		968		5,528		7,748
Equipment(a)	6		2,301		2,187		4,494
Legal and professional	221		529		5,924		6,674
Loan and foreclosure costs	261		1,171		1,273		2,705
FDIC assessment	—		—		9,708		9,708
Other intangible amortization	—		—		2,203		2,203
Other noninterest expense	934		8,024		716		9,674
Allocated indirect expense (income)	32,166		63,408		(95,574)		—
Total noninterest expense	56,021		153,331		—		209,352
Net income (loss) before income taxes	71,236		104,137		(35,744)		139,629
Income tax expense (benefit)	13,211		21,869		(6,681)		28,399
Net income (loss)	$	58,025	$	82,268	$	(29,063)	$	111,230
Loans	$	17,617,892	$	12,531,178	$	458,535	$	30,607,605
Allocated goodwill	525,836		579,156		—		1,104,992
Total assets	17,907,721		13,043,969		13,042,039		43,993,729

a) A portion of total depreciation expense of $0.1 million, $5.9 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

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Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2026

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The following table summarizes the components of accumulated other comprehensive income (loss) at June 30, 2026 and 2025, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):

(in thousands)	Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2025	$	(2,456)	$	12,894	$	(18,003)	$	(7,566)
Other comprehensive loss before reclassifications	(73,377)		—		—		(73,377)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities	3,590		—		—		3,590
Other assets / accrued expenses and other liabilities	—		(14,418)		—		(14,418)
Interest expense	—		(1,343)		—		(1,343)
Personnel expense	—		—		(126)		(126)
Income tax benefit (expense)	17,407		(3,792)		31		13,647
Net other comprehensive loss during period	(52,380)		(19,553)		(95)		(72,027)
Balance June 30, 2026	$	(54,836)	$	(6,659)	$	(18,098)	$	(79,593)
Balance December 31, 2024	$	(48,993)	$	(1,268)	$	(24,154)	$	(74,416)
Other comprehensive income before reclassifications	53,149		—		4,770		57,919
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities	3,986		—		—		3,986
Other assets / accrued expenses and other liabilities	—		8,532		—		8,532
Interest income	—		2,555		—		2,555
Personnel expense	—		—		(126)		(126)
Other expense	—		—		(8)		(8)
Income tax (expense) benefit	(14,251)		2,668		(1,157)		(12,740)
Net other comprehensive income during period	42,884		13,755		3,480		60,119
Balance June 30, 2025	$	(6,109)	$	12,487	$	(20,674)	$	(14,297)

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Subsequent Events

3 Months Ended

Jun. 30, 2026

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On April 1, 2026, the Corporation completed its previously announced acquisition of American National pursuant to the terms of the Merger Agreement by and between Associated and American National.

Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.

At the effective time of the merger, the outstanding shares of voting common stock and non-voting common stock of American National outstanding immediately prior to the effective time of the merger, other than certain shares held by the Corporation or American National, were converted into the right to receive an aggregate 22,975,382 shares of common stock of the Corporation. This represented 36.250 shares of the Corporation's common stock for each share of outstanding common stock of American National; with cash paid in lieu of fractional shares. Total consideration for the acquisition was 594.1 million valued at the acquisition date fair value of 25.86 per share.

American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets. As a result of the acquisition, the Corporation will increase its deposit market share and deliver its products and services to an expanded client base across attractive Midwest markets. As of March 31, 2026, American National had total assets of 5.2 billion, total loans of 3.8 billion and total deposits of 4.5 billion.

The acquisition of American National will be accounted for as a business combination using the acquisition method of accounting in accordance with FASB ASC Topic 805, Business Combinations, which requires assets acquired and liabilities assumed to be recognized at fair value as of the acquisition date. Due to the timing of the acquisition, the initial accounting for the acquisition has not been completed. The Corporation expects to finalize the valuation and complete the purchase price allocation as soon as practicable.

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Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2026

Accounting Standards Update and Change in Accounting Principle [Abstract]

Future Accounting Pronouncements

Future Accounting Pronouncements

The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review.

Standard	Description	Date of Anticipated Adoption	Effect on Financial Statements
ASU 2024-03 Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40)	The amendments in this update require a public business entity to disclose specific information about certain costs and expenses in the notes to its financial statements for interim and annual reporting periods. The objective of the disclosure requirements is to provide disaggregated information about a public business entity's expenses to help investors (a) better understand the entity's performance, (b) better assess the entity's prospects for future cash flows, and (c) compare an entity's performance over time and with that of other entities.	Annual period ending December 31, 2027 and subsequent interim periods	The Corporation is currently evaluating the impact on its disclosures.
ASU 2025-06 Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)	The amendments in this update simplify the capitalization guidance by removing all references to prescriptive and sequential software development stages to align with the shift to incremental and iterative software development methods.	Interim period ending March 31, 2028 and subsequent periods	The Corporation is currently evaluating the impact on its disclosures.

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Business Combinations, Asset Acquisitions, Transaction between Entities under Common Control, and Joint Venture Formation (Tables)

6 Months Ended

Apr. 01, 2026

Jun. 30, 2026

Business Combination [Abstract]

Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]

The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the effective date of the American National acquisition.

(in thousands)	April 1, 2026
Total Consideration	$	594,144
Assets
Cash and cash equivalents	$	220,898
Investment securities	989,925
Loans, net	3,716,472
Other intangible assets(a)	103,200
Other assets	155,960
Total assets	$	5,186,455
Liabilities
Deposits	$	4,544,700
Other liabilities	89,700
Total liabilities	$	4,634,400
Fair value of net assets acquired	$	552,055
Goodwill	$	42,089
(a) Core deposit intangibles

Schedule Of Financing Receivables Purchased Seasoned Loans [Table Text Block]

The following table includes the fair value and unpaid principal balance of the acquired loans and leases:

(in thousands)	Unpaid principal balance		Premium (Discount)		Loans and leases		Allowance for credit losses on loans		Loans and leases, net
Non-PCD loans	$	3,185,647	$	2,692	$	3,188,339	$	(28,263)	$	3,160,076
PCD Loans	615,403		(19,495)		595,908		(39,512)		556,396
Total	$	3,801,050	$	(16,803)	$	3,784,247	$	(67,775)	$	3,716,472

Business Combination, Separately Recognized Transaction [Table Text Block]

The following table presents merger related costs, and the line item that these costs are included in on the consolidated statement of income, for the three and six months ended June 30, 2026. Additional transaction and integration costs will be expensed in future periods as incurred.

(in thousands)	Three Months Ended June 30, 2026		Six Months Ended Jun 30, 2026
Personnel	$	13,364	$	13,364
Technology	781		781
Occupancy	23		103
Business development and advertising	417		654
Equipment	98		98
Legal and professional	9,569		10,253
Other	217		223
Total	$	24,469	$	25,476

Business Combination, Pro Forma Information [Table Text Block]

Pro Forma Financial Information

The following unaudited pro forma summary presents consolidated information of the Corporation as if the American National acquisition had occurred on January 1, 2025. The amounts do not reflect anticipated operating cost savings, revenue enhancements, or other synergies expected to result from the acquisition. Actual results may differ from the unaudited pro forma information presented.

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(Unaudited) (in thousands)	2026		2025		2026		2025
Net interest income and noninterest income	$	447,151	$	415,810	$	881,852	$	807,328
Net income	141,691		120,532		263,217		212,961

Business Combination, Pro Forma Information, Nonrecurring Adjustment [Table Text Block]

The pro forma adjustments include the effect of excluding acquisition-related expenses of $25.5 million for the six months ended June 30, 2026 and included such expenses in the first half of 2025. These adjustments also include adjusting amortization and accretion of fair value marks on acquired loans, investments, deposits, intangibles, other assets/liabilities, and the effect of income taxes.

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Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Calculations for basic and diluted earnings per common share

Presented below are the calculations for basic and diluted earnings per common share:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands, except per share data)	2026		2025		2026		2025
Net income	$	123,564	$	111,230	$	243,200	$	212,916
Preferred stock dividends	(2,875)		(2,875)		(5,750)		(5,750)
Net income available to common equity	120,689		108,355		237,450		207,166
Common shareholder dividends	(45,634)		(38,304)		(85,577)		(76,636)
Unvested share-based payment awards	(107)		(194)		(223)		(399)
Undistributed earnings	$	74,948	$	69,857	$	151,650	$	130,131
Undistributed earnings allocated to common shareholders	$	74,769	$	69,501	$	151,203	$	129,500
Undistributed earnings allocated to unvested share-based payment awards	179		356		447		630
Undistributed earnings	$	74,948	$	69,857	$	151,650	$	130,131
Basic
Distributed earnings to common shareholders	$	45,634	$	38,304	$	85,577	$	76,636
Undistributed earnings allocated to common shareholders	74,769		69,501		151,203		129,500
Total common shareholders earnings, basic	$	120,403	$	107,805	$	236,780	$	206,137
Diluted
Distributed earnings to common shareholders	$	45,634	$	38,304	$	85,577	$	76,636
Undistributed earnings allocated to common shareholders	74,769		69,501		151,203		129,500
Total common shareholders earnings, diluted	$	120,403	$	107,805	$	236,780	$	206,137
Weighted average common shares outstanding	188,084		164,936		176,654		165,081
Effect of dilutive common stock awards	1,815		1,407		1,748		1,425
Diluted weighted average common shares outstanding	189,899		166,343		178,402		166,506
Basic earnings per common share	$	0.64	$	0.65	$	1.34	$	1.25
Diluted earnings per common share	$	0.63	$	0.65	$	1.33	$	1.24

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

A summary of the Corporation’s stock option activity for the six months ended June 30, 2026 is presented below:

Stock Options	Shares(a)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value(a)
Outstanding at December 31, 2025	1,460	$	22.71	2.52 years	$	4,483
Exercised	444	23.78
Outstanding at June 30, 2026	1,016	$	22.24	2.43 years	$	8,658
Options Exercisable at June 30, 2026	1,016	$	22.24	2.43 years	$	8,658

(a) In thousands

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

The following table summarizes information about the Corporation’s restricted stock activity for the six months ended June 30, 2026:

Restricted Stock	Shares(a)	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2025	2,372	$	22.02
Granted	897	26.49
Vested	849	22.01
Forfeited	47	24.42
Outstanding at June 30, 2026	2,373	$	23.66

(a) In thousands

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Investment Securities (Tables)

6 Months Ended

Jun. 30, 2026

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	7,342	$	4	$	(106)	$	7,240
Residential mortgage-related securities:
FNMA/FHLMC	142,709		815		(6,236)		137,288
GNMA	5,518,890		2,481		(29,723)		5,491,648
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		—		(4,659)		410,221
GNMA	111,910		—		(5,066)		106,844
Asset backed securities:
FFELP	89,197		1		(986)		88,212
SBA	120,221		387		(538)		120,070
Other debt securities(a)	6,750		—		(1,687)		5,063
Total AFS investment securities	$	6,411,899	$	3,688	$	(49,001)	$	6,366,586
HTM investment securities
U.S. Treasury securities	$	997	$	5	$	—	$	1,002
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,797		(124,874)		1,468,604
Residential mortgage-related securities:
FNMA/FHLMC	790,729		39		(130,031)		660,737
GNMA	37,215		18		(2,607)		34,626
Private-label	292,007		—		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	757,723		—		(113,423)		644,300
GNMA	40,423		—		(4,334)		36,089
Total HTM investment securities	$	3,510,775	$	1,859	$	(420,816)	$	3,091,818

(a)Unrealized losses includes allowance for credit losses

The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	3,063	$	1	$	(20)	$	3,044
Residential mortgage-related securities:
FNMA/FHLMC	134,142		1,214		(5,493)		129,863
GNMA	5,000,015		40,067		(253)		5,039,829
Commercial mortgage-related securities:
FNMA/FHLMC	17,959		—		(1,001)		16,958
GNMA	113,374		—		(3,818)		109,556
Asset backed securities:
FFELP	95,977		19		(950)		95,046
SBA	283		—		(14)		269
Other debt securities	3,000		—		(2)		2,998
Total AFS investment securities	$	5,367,813	$	41,301	$	(11,551)	$	5,397,563
HTM investment securities
U.S. Treasury securities	$	996	$	19	$	—	$	1,015
Obligations of state and political subdivisions (municipal securities)	1,628,088		3,070		(123,856)		1,507,302
Residential mortgage-related securities:
FNMA/FHLMC	823,630		165		(127,333)		696,462
GNMA	39,123		82		(2,321)		36,884
Private-label	302,817		—		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	763,370		—		(113,004)		650,366
GNMA	44,552		152		(4,566)		40,138
Total HTM investment securities	$	3,602,576	$	3,488	$	(415,070)	$	3,190,994

Debt Securities, Held-to-Maturity [Table Text Block]

The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	7,342	$	4	$	(106)	$	7,240
Residential mortgage-related securities:
FNMA/FHLMC	142,709		815		(6,236)		137,288
GNMA	5,518,890		2,481		(29,723)		5,491,648
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		—		(4,659)		410,221
GNMA	111,910		—		(5,066)		106,844
Asset backed securities:
FFELP	89,197		1		(986)		88,212
SBA	120,221		387		(538)		120,070
Other debt securities(a)	6,750		—		(1,687)		5,063
Total AFS investment securities	$	6,411,899	$	3,688	$	(49,001)	$	6,366,586
HTM investment securities
U.S. Treasury securities	$	997	$	5	$	—	$	1,002
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,797		(124,874)		1,468,604
Residential mortgage-related securities:
FNMA/FHLMC	790,729		39		(130,031)		660,737
GNMA	37,215		18		(2,607)		34,626
Private-label	292,007		—		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	757,723		—		(113,423)		644,300
GNMA	40,423		—		(4,334)		36,089
Total HTM investment securities	$	3,510,775	$	1,859	$	(420,816)	$	3,091,818

(a)Unrealized losses includes allowance for credit losses

The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	$	3,063	$	1	$	(20)	$	3,044
Residential mortgage-related securities:
FNMA/FHLMC	134,142		1,214		(5,493)		129,863
GNMA	5,000,015		40,067		(253)		5,039,829
Commercial mortgage-related securities:
FNMA/FHLMC	17,959		—		(1,001)		16,958
GNMA	113,374		—		(3,818)		109,556
Asset backed securities:
FFELP	95,977		19		(950)		95,046
SBA	283		—		(14)		269
Other debt securities	3,000		—		(2)		2,998
Total AFS investment securities	$	5,367,813	$	41,301	$	(11,551)	$	5,397,563
HTM investment securities
U.S. Treasury securities	$	996	$	19	$	—	$	1,015
Obligations of state and political subdivisions (municipal securities)	1,628,088		3,070		(123,856)		1,507,302
Residential mortgage-related securities:
FNMA/FHLMC	823,630		165		(127,333)		696,462
GNMA	39,123		82		(2,321)		36,884
Private-label	302,817		—		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	763,370		—		(113,004)		650,366
GNMA	44,552		152		(4,566)		40,138
Total HTM investment securities	$	3,602,576	$	3,488	$	(415,070)	$	3,190,994

Investments Classified by Contractual Maturity Date [Table Text Block]

The expected maturities of AFS and HTM securities at June 30, 2026, are shown below:

	AFS					HTM
(in thousands)	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Due in one year or less	$	3,750	$	2,063		$	820,235	$	818,331
Due after one year through five years	7,739		7,655			825		779
Due after five years through ten years	—		—			8,078		7,932
Due after ten years	2,603		2,585			763,540		642,564
Total municipal, U.S. Treasury and other debt securities	14,092		12,303			1,592,678		1,469,606
Residential mortgage-related securities:
FNMA/FHLMC	142,709		137,288			790,729		660,737
GNMA	5,518,890		5,491,648			37,215		34,626
Private-label	—		—			292,007		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	414,880		410,221			757,723		644,300
GNMA	111,910		106,844			40,423		36,089
Asset backed securities:
FFELP	89,197		88,212			—		—
SBA	120,221		120,070			—		—
Total investment securities	$	6,411,899	$	6,366,586		$	3,510,775	$	3,091,818
Ratio of fair value to amortized cost			99.3		%			88.1		%

Schedule of Realized Gain (Loss) [Table Text Block]

The following table summarizes gross realized gains and losses on AFS securities, the gain or loss on sale and fair value adjustment of equity securities, and proceeds from the sale of AFS investment securities:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Gross losses on HTM securities	$	—	$	—	$	(4)	$	—
Fair value adjustment of equity securities	35		7		10		11
Investment securities (losses) gains, net	$	35	$	7	$	6	$	11

Schedule of Unrealized Loss on Investments [Table Text Block]

The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2026:

	Less than 12 months					12 months or more					Total
(in thousands)	Number of Securities	Unrealized Losses		Fair Value		Number of Securities	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	4	$	(99)	$	4,176	1	$	(7)	$	243	$	(106)	$	4,419
Residential mortgage-related securities:
FNMA/FHLMC	34	(604)		47,975		5	(5,632)		44,189		(6,236)		92,164
GNMA	236	(29,685)		4,396,013		2	(38)		1,901		(29,723)		4,397,914
Commercial mortgage-related securities:
FNMA/FHLMC	11	(3,780)		393,331		1	(879)		16,889		(4,659)		410,220
GNMA	—	—		—		15	(5,066)		106,844		(5,066)		106,844
Asset backed securities:
FFELP	2	(75)		30,893		12	(911)		51,501		(986)		82,394
SBA	6	(526)		89,501		2	(12)		183		(538)		89,684
Other debt securities(a)	3	(1,687)		4,062		—	—		—		(1,687)		4,062
Total	296	$	(36,456)	$	4,965,951	38	$	(12,545)	$	221,750	$	(49,001)	$	5,187,701
HTM investment securities
Obligations of state and political subdivisions (municipal securities)	327	$	(6,876)	$	500,662	407	$	(117,998)	$	615,514	$	(124,874)	$	1,116,176
Residential mortgage-related securities:
FNMA/FHLMC	15	(127)		15,968		100	(129,904)		637,637		(130,031)		653,605
GNMA	4	(60)		5,330		79	(2,547)		26,571		(2,607)		31,901
Private-label	—	—		—		18	(45,547)		246,460		(45,547)		246,460
Commercial mortgage-related securities:
FNMA/FHLMC	2	(536)		26,155		43	(112,887)		618,145		(113,423)		644,300
GNMA	—	—		—		13	(4,334)		36,088		(4,334)		36,088
Total	348	$	(7,599)	$	548,115	660	$	(413,217)	$	2,180,415	$	(420,816)	$	2,728,530

(a)Unrealized losses includes allowance for credit losses

For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2025:

	Less than 12 months					12 months or more					Total
(in thousands)	Number of Securities	Unrealized Losses		Fair Value		Number of Securities	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)	—	$	—	$	—	2	$	(20)	$	863	$	(20)	$	863
Residential mortgage-related securities:
FNMA/FHLMC	12	(95)		14,155		12	(5,398)		56,215		(5,493)		70,370
GNMA	16	(232)		143,734		3	(21)		2,674		(253)		146,408
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,001)		16,958		(1,001)		16,958
GNMA	—	—		—		15	(3,818)		109,556		(3,818)		109,556
Asset backed securities:
FFELP	2	(152)		33,239		12	(798)		55,565		(950)		88,804
SBA	—	—		—		2	(14)		231		(14)		231
Other debt securities	2	(2)		1,998		—	—		—		(2)		1,998
Total	32	$	(481)	$	193,126	47	$	(11,070)	$	242,062	$	(11,551)	$	435,188
HTM investment securities
Obligations of state and political subdivisions (municipal securities)	81	$	(2,978)	$	89,826	543	$	(120,878)	$	842,485	$	(123,856)	$	932,311
Residential mortgage-related securities:
FNMA/FHLMC	1	—		30		102	(127,333)		676,915		(127,333)		676,945
GNMA	—	—		—		80	(2,321)		30,237		(2,321)		30,237
Private-label	—	—		—		18	(43,990)		258,827		(43,990)		258,827
Commercial mortgage-related securities:
FNMA/FHLMC	2	(470)		26,287		43	(112,534)		624,079		(113,004)		650,366
GNMA	—	—		—		13	(4,566)		40,138		(4,566)		40,138
Total	84	$	(3,448)	$	116,143	799	$	(411,622)	$	2,472,681	$	(415,070)	$	2,588,824

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Loans Loans (Tables)

6 Months Ended

Jun. 30, 2026

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

The period end loan composition was as follows:

(in thousands)	Jun 30, 2026		Dec 31, 2025
Commercial and industrial	$	13,750,175	$	11,799,757
Commercial real estate — owner occupied	1,575,445		1,186,324
Commercial and business lending	15,325,620		12,986,081
Commercial real estate — investor	6,492,950		5,246,030
Real estate construction	2,546,186		1,994,642
Commercial real estate lending	9,039,136		7,240,672
Total commercial	24,364,756		20,226,753
Residential mortgage	6,808,398		6,793,957
Auto finance	4,044,416		3,106,498
Home equity	826,343		713,271
Other consumer	423,127		323,135
Total consumer	12,102,284		10,936,861
Total loans	$	36,467,040	$	31,163,614

Financing Receivable Credit Quality Indicators [Table Text Block]

The following table presents loans by credit quality indicator by origination year at June 30, 2026:

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2026		2025		2024		2023		2022		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	3,199	$	2,741,443	$	2,328,388	$	3,787,950	$	1,722,490	$	982,648	$	840,913	$	738,339	$	13,142,171
Special mention	—		22,708		626		26,761		24,508		9,346		5,458		72,581		161,988
Substandard	668		94,753		38,835		33,522		32,732		12,846		130,614		58,326		401,628
Nonaccrual	20		635		2,160		27,179		4,617		4,506		474		4,817		44,388
Commercial and industrial	$	3,887	$	2,859,539	$	2,370,009	$	3,875,412	$	1,784,347	$	1,009,346	$	977,459	$	874,063	$	13,750,175
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	182,249	$	129,676	$	247,821	$	199,462	$	146,763	$	197,576	$	380,833	$	1,484,380
Special mention	—		1,363		—		4,713		5,016		2,059		90		5,980		19,221
Substandard	—		11,913		1,886		2,097		14,611		14,693		47		23,342		68,589
Nonaccrual	—		—		—		1,797		—		—		524		934		3,255
Commercial real estate - owner occupied	$	—	$	195,525	$	131,562	$	256,428	$	219,089	$	163,515	$	198,237	$	411,089	$	1,575,445
Commercial and business lending:
Risk rating:
Pass	$	3,199	$	2,923,692	$	2,458,064	$	4,035,771	$	1,921,952	$	1,129,411	$	1,038,489	$	1,119,172	$	14,626,551
Special mention	—		24,071		626		31,474		29,524		11,405		5,548		78,561		181,209
Substandard	668		106,666		40,721		35,619		47,343		27,539		130,661		81,668		470,217
Nonaccrual	20		635		2,160		28,976		4,617		4,506		998		5,751		47,643
Commercial and business lending	$	3,887	$	3,055,064	$	2,501,571	$	4,131,840	$	2,003,436	$	1,172,861	$	1,175,696	$	1,285,152	$	15,325,620
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	695,209	$	1,061,877	$	1,762,223	$	662,819	$	438,221	$	679,245	$	844,791	$	6,144,385
Special mention	—		633		33,369		5,553		3,066		48,292		58,136		29,885		178,934
Substandard	—		21,867		10,855		12,186		24,000		5,783		54,229		29,527		158,447
Nonaccrual	—		698		—		793		—		—		7,914		1,779		11,184
Commercial real estate - investor	$	—	$	718,407	$	1,106,101	$	1,780,755	$	689,885	$	492,296	$	799,524	$	905,982	$	6,492,950
Real estate construction:
Risk rating:
Pass	$	—	$	219,286	$	161,036	$	541,782	$	872,017	$	152,821	$	3,414	$	6,963	$	1,957,319
Special mention	—		2,663		—		—		15,405		—		75,656		—		93,724
Substandard	—		25,497		80,123		105,451		7,685		34,493		238,920		—		492,169
Nonaccrual	—		2,913		—		—		—		38		—		23		2,974
Real estate construction	$	—	$	250,359	$	241,159	$	647,233	$	895,107	$	187,352	$	317,990	$	6,986	$	2,546,186
Commercial real estate lending:
Risk rating:
Pass	$	—	$	914,495	$	1,222,913	$	2,304,005	$	1,534,836	$	591,042	$	682,659	$	851,754	$	8,101,704
Special mention	—		3,296		33,369		5,553		18,471		48,292		133,792		29,885		272,658
Substandard	—		47,364		90,978		117,637		31,685		40,276		293,149		29,527		650,616
Nonaccrual	—		3,611		—		793		—		38		7,914		1,802		14,158
Commercial real estate lending	$	—	$	968,766	$	1,347,260	$	2,427,988	$	1,584,992	$	679,648	$	1,117,514	$	912,968	$	9,039,136
Total commercial:
Risk rating:
Pass	$	3,199	$	3,838,187	$	3,680,977	$	6,339,776	$	3,456,788	$	1,720,453	$	1,721,148	$	1,970,926	$	22,728,255
Special mention	—		27,367		33,995		37,027		47,995		59,697		139,340		108,446		453,867
Substandard	668		154,030		131,699		153,256		79,028		67,815		423,810		111,195		1,120,833
Nonaccrual	20		4,246		2,160		29,769		4,617		4,544		8,912		7,553		61,801
Total commercial	$	3,887	$	4,023,830	$	3,848,831	$	6,559,828	$	3,588,428	$	1,852,509	$	2,293,210	$	2,198,120	$	24,364,756

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2026		2025		2024		2023		2022		Prior		Total
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	176,272	$	309,720	$	254,049	$	438,829	$	1,461,192	$	4,090,505	$	6,730,567
Special mention	—		—		—		315		—		—		—		188		503
Substandard	—		—		5,355		—		572		366		454		246		6,993
Nonaccrual	—		—		—		2,054		4,408		7,680		11,041		45,152		70,335
Residential mortgage	$	—	$	—	$	181,627	$	312,089	$	259,029	$	446,875	$	1,472,687	$	4,136,091	$	6,808,398
Auto finance:
Risk rating:
Pass	$	—	$	—	$	856,927	$	1,398,649	$	867,078	$	498,862	$	351,555	$	57,048	$	4,030,119
Special mention	—		—		84		1,032		581		868		625		134		3,324
Nonaccrual	—		—		393		1,686		2,058		3,351		3,083		402		10,973
Auto finance	$	—	$	—	$	857,404	$	1,401,367	$	869,717	$	503,081	$	355,263	$	57,584	$	4,044,416
Home equity:
Risk rating:
Pass	$	11,561	$	726,750	$	1,158	$	5,253	$	3,937	$	4,886	$	21,268	$	55,324	$	818,576
Special mention	78		102		—		—		130		—		39		914		1,185
Nonaccrual	272		317		—		102		151		159		1,025		4,828		6,582
Home equity	$	11,911	$	727,169	$	1,158	$	5,355	$	4,218	$	5,045	$	22,332	$	61,066	$	826,343
Other consumer:
Risk rating:
Pass	$	84	$	260,894	$	36,667	$	44,583	$	18,197	$	10,311	$	5,627	$	43,888	$	420,167
Special mention	1		885		—		17		62		47		45		9		1,065
Substandard	—		1,633		—		—		—		—		—		—		1,633
Nonaccrual	—		47		—		60		47		41		53		14		262
Other consumer	$	85	$	263,459	$	36,667	$	44,660	$	18,306	$	10,399	$	5,725	$	43,911	$	423,127
Total consumer:
Risk rating:
Pass	$	11,645	$	987,644	$	1,071,024	$	1,758,205	$	1,143,261	$	952,888	$	1,839,642	$	4,246,765	$	11,999,429
Special mention	79		987		84		1,364		773		915		709		1,245		6,077
Substandard	—		1,633		5,355		—		572		366		454		246		8,626
Nonaccrual	272		364		393		3,902		6,664		11,231		15,202		50,396		88,152
Total consumer	$	11,996	$	990,628	$	1,076,856	$	1,763,471	$	1,151,270	$	965,400	$	1,856,007	$	4,298,652	$	12,102,284
Total loans:
Risk rating:
Pass	$	14,844	$	4,825,831	$	4,752,001	$	8,097,981	$	4,600,049	$	2,673,341	$	3,560,790	$	6,217,691	$	34,727,684
Special mention	79		28,354		34,079		38,391		48,768		60,612		140,049		109,691		459,944
Substandard	668		155,663		137,054		153,256		79,600		68,181		424,264		111,441		1,129,459
Nonaccrual	292		4,610		2,553		33,671		11,281		15,775		24,114		57,949		149,953
Total loans	$	15,883	$	5,014,458	$	4,925,687	$	8,323,299	$	4,739,698	$	2,817,909	$	4,149,217	$	6,496,772	$	36,467,040

(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.

The following table presents loans by credit quality indicator by origination year at December 31, 2025:

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	503	$	1,920,351	$	3,886,880	$	2,097,760	$	1,133,873	$	1,238,941	$	521,793	$	471,834	$	11,271,432
Special mention	—		11,139		3,024		311		13,774		5,849		24,971		293		59,361
Substandard	7,290		65,451		60,593		78,773		22,126		162,841		70,231		1,771		461,786
Nonaccrual	1,473		—		25		7,153		—		—		—		—		7,178
Commercial and industrial	$	9,266	$	1,996,941	$	3,950,522	$	2,183,997	$	1,169,773	$	1,407,631	$	616,995	$	473,898	$	11,799,757
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	2,957	$	241,141	$	180,867	$	141,254	$	167,496	$	157,837	$	201,588	$	1,093,140
Special mention	—		—		—		11,620		5,432		—		—		1,242		18,294
Substandard	—		13,445		7,478		14,001		15,635		1,691		11,929		10,508		74,687
Nonaccrual	—		—		203		—		—		—		—		—		203
Commercial real estate - owner occupied	$	—	$	16,402	$	248,822	$	206,488	$	162,321	$	169,187	$	169,766	$	213,338	$	1,186,324
Commercial and business lending:
Risk rating:
Pass	$	503	$	1,923,308	$	4,128,021	$	2,278,627	$	1,275,127	$	1,406,437	$	679,630	$	673,422	$	12,364,572
Special mention	—		11,139		3,024		11,931		19,206		5,849		24,971		1,535		77,655
Substandard	7,290		78,896		68,071		92,774		37,761		164,532		82,160		12,279		536,473
Nonaccrual	1,473		—		228		7,153		—		—		—		—		7,381
Commercial and business lending	$	9,266	$	2,013,343	$	4,199,344	$	2,390,485	$	1,332,094	$	1,576,818	$	786,761	$	687,236	$	12,986,081
Commercial real estate - investor:
Risk rating:
Pass	$	3,195	$	185,825	$	1,842,395	$	776,187	$	503,511	$	711,947	$	432,442	$	503,468	$	4,955,775
Special mention	—		—		40,067		11,135		14,809		58,523		26,964		5,007		156,505
Substandard	—		—		24,090		1,446		7,741		70,608		17,633		3,921		125,439
Nonaccrual	—		—		—		546		—		7,765		—		—		8,311
Commercial real estate - investor	$	3,195	$	185,825	$	1,906,552	$	789,314	$	526,061	$	848,843	$	477,039	$	512,396	$	5,246,030
Real estate construction:
Risk rating:
Pass	$	—	$	33,847	$	359,610	$	720,429	$	223,239	$	175,056	$	2,991	$	5,768	$	1,520,940
Special mention	—		—		20,611		—		—		51,262		—		—		71,873
Substandard	—		—		122,320		42,511		48,980		187,874		—		—		401,685
Nonaccrual	—		—		—		—		—		—		—		144		144
Real estate construction	$	—	$	33,847	$	502,541	$	762,940	$	272,219	$	414,192	$	2,991	$	5,912	$	1,994,642
Commercial real estate lending:
Risk rating:
Pass	$	3,195	$	219,672	$	2,202,005	$	1,496,616	$	726,750	$	887,003	$	435,433	$	509,236	$	6,476,715
Special mention	—		—		60,678		11,135		14,809		109,785		26,964		5,007		228,378
Substandard	—		—		146,410		43,957		56,721		258,482		17,633		3,921		527,124
Nonaccrual	—		—		—		546		—		7,765		—		144		8,455
Commercial real estate lending	$	3,195	$	219,672	$	2,409,093	$	1,552,254	$	798,280	$	1,263,035	$	480,030	$	518,308	$	7,240,672

					Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Total commercial:
Risk rating:
Pass	$	3,698	$	2,142,980	$	6,330,026	$	3,775,243	$	2,001,877	$	2,293,440	$	1,115,063	$	1,182,658	$	18,841,287
Special mention	—		11,139		63,702		23,066		34,015		115,634		51,935		6,542		306,033
Substandard	7,290		78,896		214,481		136,731		94,482		423,014		99,793		16,200		1,063,597
Nonaccrual	1,473		—		228		7,699		—		7,765		—		144		15,836
Total commercial	$	12,461	$	2,233,015	$	6,608,437	$	3,942,739	$	2,130,374	$	2,839,853	$	1,266,791	$	1,205,544	$	20,226,753
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	253,364	$	238,787	$	480,076	$	1,488,335	$	1,499,223	$	2,764,379	$	6,724,164
Substandard	—		—		—		580		292		129		300		—		1,301
Nonaccrual	—		—		2,425		3,102		5,101		13,141		8,985		35,738		68,492
Residential mortgage	$	—	$	—	$	255,789	$	242,469	$	485,469	$	1,501,605	$	1,508,508	$	2,800,117	$	6,793,957
Auto finance:
Risk rating:
Pass	$	—	$	—	$	1,287,267	$	842,838	$	551,549	$	388,064	$	26,402	$	2	$	3,096,122
Special mention	—		—		295		325		814		621		50		—		2,105
Nonaccrual	—		—		559		1,356		2,811		3,255		290		—		8,271
Auto finance	$	—	$	—	$	1,288,121	$	844,519	$	555,174	$	391,940	$	26,742	$	2	$	3,106,498
Home equity:
Risk rating:
Pass	$	15,259	$	623,853	$	855	$	2,188	$	2,728	$	20,514	$	4,733	$	49,793	$	704,664
Special mention	315		52		—		119		190		104		—		368		833
Nonaccrual	1,038		173		2		221		333		1,016		414		5,615		7,774
Home equity	$	16,612	$	624,078	$	857	$	2,528	$	3,251	$	21,634	$	5,147	$	55,776	$	713,271
Other consumer:
Risk rating:
Pass	$	529	$	255,490	$	13,159	$	4,070	$	1,990	$	958	$	264	$	43,575	$	319,506
Special mention	12		1,139		27		—		5		9		—		20		1,200
Substandard	—		2,374		—		—		—		—		—		—		2,374
Nonaccrual	2		35		—		3		12		—		2		3		55
Other consumer	$	543	$	259,038	$	13,186	$	4,073	$	2,007	$	967	$	266	$	43,598	$	323,135
Total consumer:
Risk rating:
Pass	$	15,788	$	879,343	$	1,554,645	$	1,087,883	$	1,036,343	$	1,897,871	$	1,530,622	$	2,857,749	$	10,844,456
Special mention	327		1,191		322		444		1,009		734		50		388		4,138
Substandard	—		2,374		—		580		292		129		300		—		3,675
Nonaccrual	1,040		208		2,986		4,682		8,257		17,412		9,691		41,356		84,592
Total consumer	$	17,155	$	883,116	$	1,557,953	$	1,093,589	$	1,045,901	$	1,916,146	$	1,540,663	$	2,899,493	$	10,936,861
Total loans:
Risk rating:
Pass	$	19,486	$	3,022,323	$	7,884,671	$	4,863,126	$	3,038,220	$	4,191,311	$	2,645,685	$	4,040,407	$	29,685,743
Special mention	327		12,330		64,024		23,510		35,024		116,368		51,985		6,930		310,171
Substandard	7,290		81,270		214,481		137,311		94,774		423,143		100,093		16,200		1,067,272
Nonaccrual	2,513		208		3,214		12,381		8,257		25,177		9,691		41,500		100,428
Total loans	$	29,616	$	3,116,131	$	8,166,390	$	5,036,328	$	3,176,275	$	4,755,999	$	2,807,454	$	4,105,037	$	31,163,614

(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.

The following table presents gross charge offs by origination year for the six months ended June 30, 2026:

			Gross Charge Offs by Origination Year
(in thousands)	Rev Loans Amortized Cost Basis		2026		2025		2024		2023		2022		Prior		Total
Commercial and industrial	$	13,356	$	135	$	160	$	254	$	712	$	425	$	6,191	$	21,233
Commercial real estate-owner occupied	—		—		—		—		—		—		—		—
Commercial and business lending	13,356		135		160		254		712		425		6,191		21,233
Commercial real estate-investor	—		—		—		—		—		—		2,710		2,710
Real estate construction	—		—		—		—		—		—		—		—
Commercial real estate lending	—		—		—		—		—		—		2,710		2,710
Total commercial	13,356		135		160		254		712		425		8,901		23,943
Residential mortgage	—		—		6		57		66		24		107		260
Auto finance	—		110		1,125		1,135		1,547		1,742		179		5,838
Home equity	1		—		60		—		2		13		16		92
Other consumer	4,150		10		100		30		26		12		31		4,359
Total consumer	4,151		120		1,291		1,222		1,641		1,791		333		10,549
Total gross charge offs	$	17,507	$	255	$	1,451	$	1,476	$	2,353	$	2,216	$	9,234	$	34,492

The following table presents gross charge offs by origination year for the year ended December 31, 2025:

			Gross Charge Offs by Origination Year
(in thousands)	Rev Loans Amortized Cost Basis		2025		2024		2023		2022		2021		Prior		Total
Commercial and industrial	$	5,424	$	831	$	627	$	3,555	$	3,799	$	379	$	—	$	14,615
Commercial real estate-owner occupied	—		—		—		113		—		—		—		113
Commercial and business lending	5,424		831		627		3,668		3,799		379		—		14,728
Commercial real estate-investor	—		—		8,356		184		12,666		—		—		21,206
Real estate construction	—		—		—		—		—		—		—		—
Commercial real estate lending	—		—		8,356		184		12,666		—		—		21,206
Total commercial	5,424		831		8,983		3,852		16,465		379		—		35,934
Residential mortgage	—		—		115		209		320		74		430		1,148
Auto finance	—		432		1,699		2,804		3,384		433		—		8,752
Home equity	—		—		—		26		5		5		380		416
Other consumer	8,194		18		85		63		63		224		56		8,703
Total consumer	8,194		450		1,899		3,102		3,772		736		866		19,019
Total gross charge offs	$	13,618	$	1,281	$	10,882	$	6,954	$	20,237	$	1,115	$	866	$	54,953

Financing Receivable, Past Due [Table Text Block]

The following table presents loans by past due status at June 30, 2026:

	Accruing
(in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90+ Days Past Due		Nonaccrual(a)(b)		Total
Commercial and industrial	$	13,694,693	$	834	$	9,834	$	426	$	44,388	$	13,750,175
Commercial real estate - owner occupied	1,571,158		893		—		139		3,255		1,575,445
Commercial and business lending	15,265,851		1,727		9,834		565		47,643		15,325,620
Commercial real estate - investor	6,478,677		1,839		1,250		—		11,184		6,492,950
Real estate construction	2,541,775		581		856		—		2,974		2,546,186
Commercial real estate lending	9,020,452		2,420		2,106		—		14,158		9,039,136
Total commercial	24,286,303		4,147		11,940		565		61,801		24,364,756
Residential mortgage	6,724,029		13,531		503		—		70,335		6,808,398
Auto finance	4,013,076		17,043		3,324		—		10,973		4,044,416
Home equity	815,225		3,351		1,185		—		6,582		826,343
Other consumer(c)	418,154		1,899		1,089		1,723		262		423,127
Total consumer	11,970,484		35,824		6,101		1,723		88,152		12,102,284
Total loans	$	36,256,787	$	39,971	$	18,041	$	2,288	$	149,953	$	36,467,040

(a) Of the total nonaccrual loans, $78.9 million, or 53%, were current with respect to payment at June 30, 2026.

(b) No interest income was recognized on nonaccrual loans for the three and six months ended June 30, 2026. In addition, there were $18.2 million of nonaccrual loans for which there was no related ACLL at June 30, 2026.

(c) Past due portions exclude guaranteed student loans.

The following table presents loans by past due status at December 31, 2025:

	Accruing
(in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90+ Days  Past Due		Nonaccrual(a)(b)		Total
Commercial and industrial	$	11,789,526	$	2,153	$	530	$	370	$	7,178	$	11,799,757
Commercial real estate - owner occupied	1,186,087		—		34		—		203		1,186,324
Commercial and business lending	12,975,613		2,153		564		370		7,381		12,986,081
Commercial real estate - investor	5,218,314		14,148		5,257		—		8,311		5,246,030
Real estate construction	1,994,381		117		—		—		144		1,994,642
Commercial real estate lending	7,212,695		14,265		5,257		—		8,455		7,240,672
Total commercial	20,188,308		16,418		5,821		370		15,836		20,226,753
Residential mortgage	6,712,330		13,135		—		—		68,492		6,793,957
Auto finance	3,081,782		14,340		2,105		—		8,271		3,106,498
Home equity	701,719		2,945		833		—		7,774		713,271
Other consumer(c)	317,932		1,473		1,231		2,444		55		323,135
Total consumer	10,813,763		31,893		4,169		2,444		84,592		10,936,861
Total loans	$	31,002,071	$	48,311	$	9,990	$	2,814	$	100,428	$	31,163,614

(a) Of the total nonaccrual loans, $31.2 million, or 31%, were current with respect to payment at December 31, 2025.

(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2025. In addition, there were $14.6 million of nonaccrual loans for which there was no related ACLL at December 31, 2025

(c) Past due portions exclude guaranteed student loans.

Financing Receivable, Modified [Table Text Block]

The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at June 30, 2026 and June 30, 2025.

	Interest Rate Concession
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Commercial and industrial	$	120	$	154	$	273	$	294
Other consumer	727		737		1,330		1,529
Total loans modified	$	847	$	891	$	1,603	$	1,823

	Term Extension
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Residential mortgage	$	553	$	305	$	1,059	$	305

	Combination - Interest Rate Concession and Term Extension
	Amortized Cost
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Residential mortgage	$	1,137	$	591	$	3,463	$	2,094
Home equity	37		67		88		125
Total loans modified	$	1,174	$	658	$	3,551	$	2,219

The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans.

	Interest Rate Concession
	Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
Loan Type	2026		2025		2026		2025
Commercial and industrial	(22)	%	(23)	%	(22)	%	(24)	%
Residential mortgage	—	%	2	%	1	%	1	%
Home equity	(2)	%	—	%	(2)	%	(2)	%
Other consumer	(22)	%	(21)	%	(21)	%	(21)	%
Weighted average of total loans modified	(9)	%	(10)	%	(6)	%	(8)	%

(a) Some interest rate concessions may involve an increase in rate that was lower in comparison to prevailing market rates.

	Term Extension
	Financial Effect, Weighted Average Term Increase(a)
	Three Months Ended Jun 30,		Six Months Ended Jun 30,
Loan Type	2026	2025	2026	2025
Residential mortgage	115 months	165 months	107 months	152 months
Home equity	240 months	60 months	131 months	60 months
Weighted average of total loans modified	118 months	158 months	107 months	147 months

(a) During the three months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 300 to 418 months and 268 to 426 months, respectively. During the six months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 305 to 412 months and 267 to 414, respectively.

Financing Receivable, Modified, Past Due [Table Text Block]

The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2026:

	Payment Status (Amortized Cost Basis)
(in thousands)	Current		30-89 Days Past Due		90+ Days Past Due
Commercial and industrial	$	367	$	—	$	—
Residential mortgage	6,509		943		1,183
Home equity	239		—		27
Other consumer	2,055		—		—
Total loans modified	$	9,170	$	943	$	1,210

The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2025:

	Payment Status (Amortized Cost Basis)
(in thousands)	Current		30-89 Days Past Due		90+ Days Past Due
Commercial and industrial	$	431	$	—	$	—
Residential mortgage	3,406		605		702
Home equity	288		31		—
Other consumer	2,303		—		—
Total loans modified	$	6,427	$	635	$	702

Financing Receivable, Modified, Subsequent Default [Table Text Block]

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession for loans that were modified in the previous twelve months and subsequently had a payment default during the six months ended June 30, 2026:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
(in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Residential mortgage	$	—	$	—	$	303

None of the loans modified in the previous twelve months subsequently had a payment default during the six months ended June 30, 2025.

Financing Receivable, Allowance for Credit Loss [Table Text Block]

The following table presents a summary of the changes in the ACLL by portfolio segment for the six months ended June 30, 2026:

(in thousands)	Dec 31, 2025		Provision for loan losses recorded at acquisition		Allowance for PCD loans acquired		Allowance for PSL acquired		Charge offs		Recoveries		Net (Charge offs) Recoveries		Provision for Credit Losses		Jun 30, 2026		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	168,636	$	294	$	19,514	$	5,086	$	(21,233)	$	893	$	(20,340)	$	29,105	$	202,295
Commercial real estate — owner occupied	11,327		—		2,516		1,198		—		—		—		(1,887)		13,154
Commercial and business lending	179,963		294		22,030		6,284		(21,233)		893		(20,340)		27,218		215,449
Commercial real estate — investor	58,243		—		11,640		7,590		(2,710)		500		(2,210)		(10,475)		64,788
Real estate construction	46,595		—		3,459		3,298		—		4		4		6,065		59,421
Commercial real estate lending	104,838		—		15,099		10,888		(2,710)		504		(2,206)		(4,410)		124,209
Total commercial	284,801		294		37,129		17,172		(23,943)		1,397		(22,546)		22,808		339,658
Residential mortgage	33,644		—		790		1,028		(260)		211		(49)		39		35,452
Auto finance	27,470		—		1,346		7,241		(5,838)		2,487		(3,351)		2,059		34,765
Home equity	16,343		—		174		2,058		(92)		782		690		(765)		18,500
Other consumer	15,810		103		73		764		(4,359)		1,104		(3,255)		1,859		15,354
Total consumer	93,267		103		2,383		11,091		(10,549)		4,584		(5,965)		3,192		104,071
Total loans	$	378,068	$	397	$	39,512	$	28,263	$	(34,492)	$	5,981	$	(28,511)	$	26,000	$	443,729
Allowance for unfunded commitments
Commercial and industrial	$	18,698	$	—	$	1,300	$	689	$	—	$	—	$	—	$	(1,650)	$	19,037
Commercial real estate — owner occupied	132		—		18		21		—		—		—		78		249
Commercial and business lending	18,830		—		1,318		710		—		—		—		(1,572)		19,286
Commercial real estate — investor	499		—		102		28		—		—		—		281		910
Real estate construction	17,947		—		2,169		901		—		—		—		5,243		26,260
Commercial real estate lending	18,446		—		2,271		929		—		—		—		5,524		27,170
Total commercial	37,276		—		3,589		1,639		—		—		—		3,952		46,456
Home equity	2,406		—		8		207		—		—		—		49		2,670
Other consumer	1,594		—		—		25		—		—		—		(1)		1,618
Total consumer	4,000		—		8		232		—		—		—		48		4,288
Total loans	$	41,276	$	—	$	3,597	$	1,871	$	—	$	—	$	—	$	4,000	$	50,744
Allowance for credit losses on loans
Commercial and industrial	$	187,334	$	294	$	20,814	$	5,775	$	(21,233)	$	893	$	(20,340)	$	27,455	$	221,332	1.61	%
Commercial real estate — owner occupied	11,459		—		2,534		1,219		—		—		—		(1,809)		13,403		0.85	%
Commercial and business lending	198,793		294		23,348		6,994		(21,233)		893		(20,340)		25,646		234,735		1.53	%
Commercial real estate — investor	58,742		—		11,742		7,618		(2,710)		500		(2,210)		(10,194)		65,698		1.01	%
Real estate construction	64,542		—		5,628		4,199		—		4		4		11,308		85,681		3.37	%
Commercial real estate lending	123,284		—		17,370		11,817		(2,710)		504		(2,206)		1,114		151,379		1.67	%
Total commercial	322,077		294		40,718		18,811		(23,943)		1,397		(22,546)		26,760		386,114		1.58	%
Residential mortgage	33,644		—		790		1,028		(260)		211		(49)		39		35,452		0.52	%
Auto finance	27,470		—		1,346		7,241		(5,838)		2,487		(3,351)		2,059		34,765		0.86	%
Home equity	18,749		—		182		2,265		(92)		782		690		(716)		21,170		2.56	%
Other consumer	17,404		103		73		789		(4,359)		1,104		(3,255)		1,858		16,972		4.01	%
Total consumer	97,267		103		2,391		11,323		(10,549)		4,584		(5,965)		3,240		108,359		0.90	%
Total loans	$	419,344	$	397	$	43,109	$	30,134	$	(34,492)	$	5,981	$	(28,511)	$	30,000	$	494,473	1.36	%

The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2025:

(in thousands)	Dec 31, 2024		Charge offs		Recoveries		Net (Charge offs) Recoveries		Provision for Credit Losses		Dec 31, 2025		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	136,596	$	(14,615)	$	8,357	$	(6,258)	$	38,298	$	168,636
Commercial real estate — owner occupied	9,417		(113)		—		(113)		2,023		11,327
Commercial and business lending	146,013		(14,728)		8,357		(6,371)		40,321		179,963
Commercial real estate — investor	71,547		(21,206)		2,985		(18,221)		4,917		58,243
Real estate construction	51,499		—		154		154		(5,058)		46,595
Commercial real estate lending	123,046		(21,206)		3,139		(18,067)		(141)		104,838
Total commercial	269,060		(35,934)		11,496		(24,438)		40,180		284,801
Residential mortgage	32,576		(1,148)		615		(533)		1,601		33,644
Auto finance	28,467		(8,752)		3,029		(5,723)		4,726		27,470
Home equity	16,620		(416)		999		583		(860)		16,343
Other consumer	16,823		(8,703)		1,837		(6,866)		5,853		15,810
Total consumer	94,486		(19,019)		6,480		(12,539)		11,320		93,267
Total loans	$	363,545	$	(54,953)	$	17,976	$	(36,977)	$	51,500	$	378,068
Allowance for unfunded commitments
Commercial and industrial	$	14,456	$	—	$	—	$	—	$	4,242	$	18,698
Commercial real estate — owner occupied	151		—		—		—		(19)		132
Commercial and business lending	14,607		—		—		—		4,223		18,830
Commercial real estate — investor	578		—		—		—		(79)		499
Real estate construction	19,591		—		—		—		(1,644)		17,947
Commercial real estate lending	20,169		—		—		—		(1,723)		18,446
Total commercial	34,776		—		—		—		2,500		37,276
Home equity	2,465		—		—		—		(59)		2,406
Other consumer	1,535		—		—		—		59		1,594
Total consumer	4,000		—		—		—		—		4,000
Total loans	$	38,776	$	—	$	—	$	—	$	2,500	$	41,276
Allowance for credit losses on loans
Commercial and industrial	$	151,052	$	(14,615)	$	8,357	$	(6,258)	$	42,540	$	187,334	1.59	%
Commercial real estate — owner occupied	9,568		(113)		—		(113)		2,004		11,459		0.97	%
Commercial and business lending	160,620		(14,728)		8,357		(6,371)		44,544		198,793		1.53	%
Commercial real estate — investor	72,125		(21,206)		2,985		(18,221)		4,838		58,742		1.12	%
Real estate construction	71,090		—		154		154		(6,702)		64,542		3.24	%
Commercial real estate lending	143,215		(21,206)		3,139		(18,067)		(1,864)		123,284		1.70	%
Total commercial	303,835		(35,934)		11,496		(24,438)		42,680		322,077		1.59	%
Residential mortgage	32,576		(1,148)		615		(533)		1,601		33,644		0.50	%
Auto finance	28,467		(8,752)		3,029		(5,723)		4,726		27,470		0.88	%
Home equity	19,085		(416)		999		583		(919)		18,749		2.63	%
Other consumer	18,358		(8,703)		1,837		(6,866)		5,912		17,404		5.39	%
Total consumer	98,486		(19,019)		6,480		(12,539)		11,320		97,267		0.89	%
Total loans	$	402,322	$	(54,953)	$	17,976	$	(36,977)	$	54,000	$	419,344	1.35	%

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Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:

(in thousands)	Six Months Ended Jun 30, 2026		Year Ended Dec 31, 2025
Core deposit intangibles
Gross carrying amount at the beginning of period	$	88,109	$	88,109
Additions during the period	103,200		—
Accumulated amortization	(74,356)		(65,260)
Net book value	$	116,953	$	22,849
Amortization during the period	$	9,096	$	8,811

Schedule of Servicing Assets at Fair Value [Table Text Block]

A summary of changes in the balance of the MSRs asset under the fair value measurement method is as follows:

(in thousands)	Six Months Ended Jun 30, 2026			Year Ended Dec 31, 2025
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$	86,337		$	87,683
Additions	6,159			8,716
Decay	(4,899)			(8,621)
Valuation:
Changes in fair value of asset	86			(1,441)
Mortgage servicing rights at end of period	$	87,683		$	86,337
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)	$	6,160,254		$	6,191,012
Mortgage servicing rights to servicing portfolio	1.42		%	1.39		%

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The following table shows the estimated future yearly amortization expense for CDIs and decay for MSRs:

(in thousands)	Core Deposit Intangibles		Mortgage Servicing Rights
Six Months Ended December 31, 2026	$	13,788	$	4,817
2027	26,167		11,601
2028	18,965		11,838
2029	15,285		11,189
2030	11,788		10,214
2031	9,851		9,123
Beyond 2031	21,109		28,901
Total estimated amortization expense and MSRs decay(a)	$	116,953	$	87,683

(a) Includes the decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns.

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Short and Long-Term Funding (Tables)

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year):

(in thousands)	June 30, 2026		December 31, 2025
Short-term funding
Federal funds purchased	$	473,905	$	260,070
Securities sold under agreements to repurchase	55,371		47,794
Federal funds purchased and securities sold under agreements to repurchase	$	529,276	$	307,864
Long-term funding
Corporation senior notes, at par	$	300,000	$	300,000
Corporation subordinated notes, at par	300,000		300,000
Discount and capitalized costs	(6,895)		(7,484)
Subordinated debt fair value hedge(a)	(2,025)		1,760
Total long-term funding	$	591,080	$	594,276
Total short and long-term funding, excluding FHLB advances	$	1,120,356	$	902,140
FHLB advances
Short-term FHLB advances	$	4,315,000	$	2,855,250
Long-term FHLB advances	263,115		414,122
FHLB advances fair value hedge(a)	(3,434)		(1,278)
Total FHLB advances	$	4,574,681	$	3,268,094
Total short and long-term funding	$	5,695,037	$	4,170,234

(a) For additional information on the fair value hedges, see Note 10.

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]

The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets is presented in the following table:

	Overnight and Continuous
(in thousands)	June 30, 2026		December 31, 2025
Repurchase agreements
Agency mortgage-related securities	$	55,371	$	47,794

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Derivative and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2026

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges:

	Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included
	Carrying Amount of the Hedged Assets/(Liabilities)(a)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		Carrying Amount of the Hedged Assets/(Liabilities)(a)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
(in thousands)	Jun 30, 2026				Dec 31, 2025
Other long-term funding	$	(297,975)	$	2,025	$	(301,760)	$	(1,760)
FHLB Advances	(196,566)		3,434		(198,722)		1,278
Total	$	(494,541)	$	5,459	$	(500,482)	$	(482)

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At June 30, 2026 and December 31, 2025, the carrying amount excluded for foreign currency denominated loans was $318.0 million and $318.5 million, respectively.

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income:

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value and Cash Flow Hedging Relationships
	Three Months Ended Jun 30,								Six Months Ended Jun 30,
	2026				2025				2026				2025
(in thousands)	Interest Income		Interest (Expense)		Interest Income		Interest (Expense)		Interest Income		Interest (Expense)		Interest Income		Interest (Expense)
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded(a)	$	565	$	(380)	$	(1,464)	$	(1,942)	$	1,169	$	(777)	$	(2,614)	$	(4,160)
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items	(31)		2,952		(27)		(4,099)		(174)		5,942		(58)		(11,096)
Derivatives designated as hedging instruments(a)	597		(3,332)		(1,437)		2,158		1,343		(6,719)		(2,555)		6,936

(a) Includes net settlements on the derivatives.

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value Hedging Relationships
	Three Months Ended Jun 30,				Six Months Ended Jun 30,
	2026		2025		2026		2025
(in thousands)	Capital Markets, Net		Capital Markets, Net		Capital Markets, Net		Capital Markets, Net
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded	$	51	$	—	$	53	$	1
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items	(13,163)		19,542		(18,086)		20,095
Derivatives designated as hedging instruments	13,214		(19,542)		18,139		(20,093)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss):

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivatives(a)	$	(6,506)	$	1,264	$	(14,418)	$	8,532
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)	(597)		1,437		(1,343)		2,555

(a) The entirety of gains (losses) recognized in OCI as well as those reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness.

Gain (loss) on derivative instruments not designated as hedging instruments

The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income:

	Consolidated Statements of Income Category of Gain / (Loss)  Recognized in Income	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)		2026		2025		2026		2025
Derivative instruments
Interest rate-related and other instruments — customer and mirror, net	Capital markets, net	$	(1)	$	(42)	$	(31)	$	(90)
Interest rate-related instruments — MSRs hedge	Mortgage banking, net	(420)		(308)		(219)		1,158
Foreign currency exchange forwards	Capital markets, net	202		(1,075)		642		(575)
Interest rate lock commitments (mortgage)	Mortgage banking, net	595		933		617		1,594
Forward commitments (mortgage)	Mortgage banking, net	(1,339)		(779)		46		(1,616)

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Balance Sheet Offsetting (Tables)

6 Months Ended

Jun. 30, 2026

Offsetting [Abstract]

Offsetting Assets [Table Text Block]

The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Liabilities Offset		Cash Collateral Received				Security Collateral Received		Net Amount
Derivative assets
June 30, 2026	$	48,451	$	(9,343)	$	(17,769)	$	21,339	$	(17,912)	$	3,427
December 31, 2025	42,468		(12,839)		(10,343)		19,286		(18,131)		1,155

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Assets Offset		Cash Collateral Pledged				Security Collateral Pledged		Net  Amount
Derivative liabilities
June 30, 2026	$	15,109	$	(9,343)	$	(720)	$	5,046	$	—	$	5,046
December 31, 2025	23,006		(12,839)		(8,334)		1,833		—		1,833

Offsetting Liabilities [Table Text Block]

The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Liabilities Offset		Cash Collateral Received				Security Collateral Received		Net Amount
Derivative assets
June 30, 2026	$	48,451	$	(9,343)	$	(17,769)	$	21,339	$	(17,912)	$	3,427
December 31, 2025	42,468		(12,839)		(10,343)		19,286		(18,131)		1,155

	Gross Amounts Recognized		Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets				Net Amounts Presented on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)			Derivative Assets Offset		Cash Collateral Pledged				Security Collateral Pledged		Net  Amount
Derivative liabilities
June 30, 2026	$	15,109	$	(9,343)	$	(720)	$	5,046	$	—	$	5,046
December 31, 2025	23,006		(12,839)		(8,334)		1,833		—		1,833

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Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

Summary of lending-related and other commitments

The following is a summary of lending-related commitments:

(in thousands)	Jun 30, 2026		Dec 31, 2025
Commitments to extend credit(a), excluding commitments to originate residential mortgage loans held for sale(b)	$	13,006,388	$	11,872,816
Commercial letters of credit(a)	589		425
Standby letters of credit(c)	252,770		222,047

(a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at June 30, 2026 or December 31, 2025.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2.4 million at June 30, 2026 and $2.2 million at December 31, 2025, as an estimate of the fair value of these financial instruments.

Schedule Of Unfunded Commitments [Table Text Block]

The following table presents a summary of the changes in the allowance for unfunded commitments:

(in thousands)	Six Months Ended Jun 30, 2026		Year Ended Dec 31, 2025
Allowance for unfunded commitments
Balance at beginning of period	$	41,276	$	38,776
Initial allowance for PCD unfunded commitments	3,597		—
Initial allowance for purchased seasoned unfunded commitments	1,871		—
Provision for unfunded commitments	4,000		2,500
Balance at end of period	$	50,744	$	41,276

Schedule of income tax credits from qualified affordable housing projects

The following table summarizes income tax credits, other income tax benefits, and investment amortization generated from the Corporation's investments in these projects, which are recognized as a component within income tax expense on the consolidated statements of income and included in the change in net income tax position and amortization of tax credit investments on the consolidated statements of cash flows:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
Income tax credits and other income tax benefits recognized	$	10,406	$	10,772	$	19,543	$	20,230
Amortization expense	8,692		8,369		17,146		17,058

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2026

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments, aggregated by the level in the fair value hierarchy within which those measurements fall:

	Jun 30, 2026
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	548,057	$	548,057	$	548,057	$	—	$	—
Interest-bearing deposits in other financial institutions	1,268,379		1,268,379		1,268,379		—		—
Federal funds sold and securities purchased under agreements to resell	14,355		14,355		14,355		—		—
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)	7,240		7,240		—		7,240		—
Residential mortgage-related securities:
FNMA / FHLMC	137,288		137,288		—		137,288		—
GNMA	5,491,648		5,491,648		—		5,491,648		—
Commercial mortgage-related securities:
FNMA / FHLMC	410,221		410,221		—		410,221		—
GNMA	106,844		106,844		—		106,844		—
Asset backed securities:
FFELP	88,212		88,212		—		88,212		—
SBA	120,070		120,070		—		120,070		—
Other debt securities(b)	5,063		5,063		—		3,000		2,063
Total AFS investment securities	6,366,586		6,366,586		—		6,364,523		2,063
HTM investment securities:
U.S. Treasury securities	997		1,002		1,002		—		—
Obligations of state and political subdivisions (municipal securities)	1,591,681		1,468,604		—		1,468,604		—
Residential mortgage-related securities:
FNMA / FHLMC	790,729		660,737		—		660,737		—
GNMA	37,215		34,626		—		34,626		—
Private-label	292,007		246,460		—		246,460		—
Commercial mortgage-related securities:
FNMA / FHLMC	757,723		644,300		—		644,300		—
GNMA	40,423		36,089		—		36,089		—
Total HTM investment securities	3,510,775		3,091,818		1,002		3,090,816		—
Equity securities:
Equity securities	14,960		14,960		14,960		—		—
Equity securities at NAV	15,000		15,000
Total equity securities	29,960		29,960
Regulatory stocks	329,436		329,436		—		329,436		—
Residential loans held for sale	94,490		94,490		—		94,490		—
Commercial loans held for sale	15,000		15,000		—		15,000		—
Loans, net	35,976,291		35,021,793		—		—		35,021,793
Bank and corporate owned life insurance	717,116		717,116		—		717,116		—
Mortgage servicing rights, net	87,683		87,683		—		—		87,683
Interest rate-related instruments designated as hedging instruments(a)	1,435		1,435		—		1,435		—
Foreign currency exchange forwards designated as hedging instruments(a)	1,355		1,355		—		1,355		—
Interest rate-related and other instruments not designated as hedging instruments(a)	61,693		61,693		—		61,693		—
Foreign currency exchange forwards not designated as hedging instruments(a)	440		440		—		440		—
Interest rate lock commitments to originate residential mortgage loans held for sale	1,432		1,432		—		—		1,432
Total selected assets at fair value	$	49,024,483	$	47,651,028	$	1,846,753	$	10,676,304	$	35,112,971

(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

(b) The quantifiable unobservable input for fair value measurement of the Level 3 classified security is externally developed.

	Jun 30, 2026
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Brokered CDs	$	3,933,787	$	3,923,505	$	—	$	3,923,505	$	—
Other time deposits	4,782,343		4,771,175		—		4,771,175		—
Federal funds purchased and securities sold under agreements to repurchase	529,276		529,276		529,276		—		—
FHLB advances	4,574,681		4,568,111		—		4,568,111		—
Senior and subordinated debt	591,080		589,506		—		589,506		—
Standby letters of credit(a)	2,365		2,365		—		2,365		—
Interest rate-related instruments designated as hedging instruments(b)	6,737		6,737		—		6,737		—
Foreign currency exchange forwards designated as hedging instruments(b)	303		303		—		303		—
Interest rate-related and other instruments not designated as hedging instruments(b)	111,446		111,446		—		111,446		—
Foreign currency exchange forwards not designated as hedging instruments(b)	198		198		—		198		—
Forward commitments to sell residential mortgage loans	397		397		—		—		397
Total selected liabilities at fair value	$	14,532,613	$	14,503,019	$	529,276	$	13,973,346	$	397

(a) The commitment on standby letters of credit was $252.8 million at June 30, 2026. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

	Dec 31, 2025
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	574,698	$	574,698	$	574,698	$	—	$	—
Interest-bearing deposits in other financial institutions	1,144,123		1,144,123		1,144,123		—		—
Federal funds sold and securities purchased under agreements to resell	1,400		1,400		1,400		—		—
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)	3,044		3,044		—		3,044		—
Residential mortgage-related securities:
FNMA / FHLMC	129,863		129,863		—		129,863		—
GNMA	5,039,829		5,039,829		—		5,039,829		—
Commercial mortgage-related securities:
FNMA / FHLMC	16,958		16,958		—		16,958		—
GNMA	109,556		109,556		—		109,556		—
Asset backed securities:
FFELP	95,046		95,046		—		95,046		—
SBA	269		269		—		269		—
Other debt securities	2,998		2,998		—		2,998		—
Total AFS investment securities	5,397,563		5,397,563		—		5,397,563		—
HTM investment securities:
U.S. Treasury securities	996		1,015		1,015		—		—
Obligations of state and political subdivisions (municipal securities)	1,628,088		1,507,302		—		1,507,302		—
Residential mortgage-related securities:
FNMA / FHLMC	823,630		696,462		—		696,462		—
GNMA	39,123		36,884		—		36,884		—
Private-label	302,817		258,827		—		258,827		—
Commercial mortgage-related securities:
FNMA / FHLMC	763,370		650,366		—		650,366		—
GNMA	44,552		40,138		—		40,138		—
Total HTM investment securities	3,602,576		3,190,994		1,015		3,189,979		—
Equity securities:
Equity securities	11,060		11,060		11,060		—		—
Equity securities at NAV	15,000		15,000
Total equity securities	26,060		26,060
Regulatory stocks	252,514		252,514		—		252,514		—
Residential loans held for sale	72,499		72,499		—		72,499		—
Loans, net	30,766,886		29,970,788		—		—		29,970,788
Bank and corporate owned life insurance	694,452		694,452		—		694,452		—
Mortgage servicing rights, net	86,337		86,337		—		—		86,337
Interest rate-related instruments designated as hedging instruments(a)	10,517		10,517		—		10,517		—
Foreign currency exchange forwards designated as hedging instruments(a)	757		757		—		757		—
Interest rate-related and other instruments not designated as hedging instruments(a)	66,787		66,787		—		66,787		—
Foreign currency exchange forwards not designated as hedging instruments(a)	1,731		1,731		—		1,731		—
Interest rate lock commitments to originate residential mortgage loans held for sale	814		814		—		—		814
Total selected assets at fair value	$	42,699,714	$	41,492,034	$	1,732,296	$	9,686,799	$	30,057,939

(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

	Dec 31, 2025
(in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Brokered CDs	$	3,795,133	$	3,791,245	$	—	$	3,791,245	$	—
Other time deposits	4,041,178		4,035,549		—		4,035,549		—
Federal funds purchased and securities sold under agreements to repurchase	307,864		307,864		307,864		—		—
FHLB advances	3,268,094		3,267,836		—		3,267,836		—
Senior and subordinated debt	594,276		598,141		—		598,141		—
Standby letters of credit(a)	2,225		2,225		—		2,225		—
Interest rate-related instruments designated as hedging instruments(b)	1		1		—		1		—
Foreign currency exchange forwards designated as hedging instruments(b)	194		194		—		194		—
Interest rate-related and other instruments not designated as hedging instruments(b)	108,631		108,631		—		108,631		—
Foreign currency exchange forwards not designated as hedging instruments(b)	1,517		1,517		—		1,517		—
Forward commitments to sell residential mortgage loans	444		444		—		—		444
Total selected liabilities at fair value	$	12,119,557	$	12,113,647	$	307,864	$	11,805,339	$	444

(a) The commitment on standby letters of credit was $222.0 million at December 31, 2025. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The table below presents a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage derivatives measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy:

(in thousands)	Interest rate lock commitments to originate residential mortgage loans held for sale		Forward commitments to sell residential mortgage loans
Balance December 31, 2024	$	327	$	(254)
New production	13,435		(3,998)
Closed loans / settlements	(13,690)		2,738
Other	742		1,958
Change in mortgage derivative	487		698
Balance December 31, 2025	814		444
New production	7,629		(2,240)
Closed loans / settlements	(6,308)		2,910
Other	(703)		(717)
Change in mortgage derivative	618		(47)
Balance June 30, 2026	$	1,432	$	397

Equity Securities without Readily Determinable Fair Value [Table Text Block]

The following table presents a rollforward of the fair value of Level 3 equity securities that are measured under the measurement alternative, and the related adjustments recorded during the periods presented for those securities with observable price changes:

(in thousands)
Fair value as of December 31, 2024	$	72
Purchases	14
Sales	(23)
Transfers out of level 3	(63)
Fair value as of December 31, 2025	$	—

The Corporation did not have any activity for Level 3 equity securities for the six months ended June 30, 2026.

Fair Value Measurements, Nonrecurring [Table Text Block]

The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall:

		Fair Value
(in thousands)	Fair Value Hierarchy	June 30, 2026		December 31, 2025
Assets
Individually evaluated loans	Level 3	$	48,296	$	18,659
OREO(a)	Level 2	1,397		770

(a) These assets are held at lower of its carrying amount or fair value less cost to sell. Assets included here are those that were adjusted to fair value less cost to sell during the period.

Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table Text Block]

The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements:

June 30, 2026	Valuation Technique	Significant Unobservable Input	Range of Inputs			Weighted Average Input Applied
Mortgage servicing rights	Discounted cash flow	Option adjusted spread	5%	-	8%	5%
Mortgage servicing rights	Discounted cash flow	Constant prepayment rate	—%	-	100%	8%
Individually evaluated loans	Discounted cash flow	Discount factor	45%	-	45%	45%
Individually evaluated loans	Market approach	Appraisal / Cost to sell	44%	-	80%	53%
Interest rate lock commitments to originate residential mortgage loans held for sale	Discounted cash flow	Closing ratio	70%	-	100%	92%

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Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic pension benefit and net periodic cost for the RAP and Postretirement Plan were as follows:

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
RAP
Service cost	$	869	$	810	$	1,737	$	1,619
Interest cost	2,749		2,814		5,499		5,628
Expected return on plan assets	(9,772)		(9,809)		(19,544)		(19,619)
Amortization of prior service credit	(44)		(44)		(89)		(89)
Total net periodic pension benefit	$	(6,198)	$	(6,230)	$	(12,397)	$	(12,460)
Postretirement Plan
Interest cost	$	22	$	26	$	43	$	53
Amortization of prior service credit	(19)		(19)		(38)		(38)
Amortization of actuarial loss	—		4		—		8
Total net periodic cost	$	3	$	12	$	6	$	23

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Segment Reporting (Tables)

3 Months Ended

6 Months Ended

Jun. 30, 2026

Jun. 30, 2026

Segment Reporting [Abstract]

Selected segment information

Financial information about the Corporation’s segments is presented below:

	Three Months Ended June 30, 2026
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income	$	267,324	$	86,481	$	16,234	$	370,039
Net intersegment interest (expense) income	(105,641)		136,046		(30,405)		—
Net interest income (expense)	161,683		222,527		(14,171)		370,039
Noninterest income	15,648		56,437		8,313		80,398
Total income (expense) before provision	177,331		278,964		(5,858)		450,437
Provision for credit losses	21,287		6,456		(8,355)		19,388
Total income after provision	156,044		272,508		2,497		431,049
Noninterest expense
Personnel	24,595		65,456		71,117		161,168
Technology(a)	1,293		13,853		17,721		32,867
Occupancy(a)	255		8,405		5,431		14,091
Business development and advertising	1,128		839		6,581		8,548
Equipment(a)	6		2,319		3,098		5,423
Legal and professional	272		1,478		15,704		17,454
Loan and foreclosure costs	233		1,296		23		1,552
FDIC assessment	—		—		10,595		10,595
Other intangible amortization	—		—		6,894		6,894
Other noninterest expense	1,087		10,376		1,827		13,290
Allocated indirect expense (income)	29,531		70,523		(100,054)		—
Total noninterest expense	58,400		174,545		38,937		271,882
Net income (loss) before income taxes	97,644		97,963		(36,440)		159,167
Income tax expense	17,567		20,676		(2,640)		35,603
Net income (loss)	$	80,077	$	77,287	$	(33,800)	$	123,564
Loans	$	21,736,674	$	14,231,238	$	499,128	$	36,467,040
Allocated goodwill	556,343		590,738		—		1,147,081
Total assets	22,552,085		15,452,018		13,808,403		51,812,506

(a) A portion of total depreciation expense of $0.2 million, $6.3 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

	Three Months Ended June 30, 2025
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income (expense)	$	242,978	$	68,871	$	(11,849)	$	300,000
Net intersegment interest (expense) income	(107,337)		143,478		(36,141)		—
Net interest income (expense)	135,641		212,349		(47,990)		300,000
Noninterest income	11,984		51,481		3,512		66,977
Total income (expense) before provision	147,625		263,830		(44,478)		366,977
Provision for credit losses	20,369		6,363		(8,736)		17,996
Total income (expense) after provision	127,256		257,467		(35,742)		348,981
Noninterest expense
Personnel	20,149		56,641		50,204		126,994
Technology(a)	842		12,903		12,763		26,508
Occupancy(a)	190		7,386		5,068		12,644
Business development and advertising	1,252		968		5,528		7,748
Equipment(a)	6		2,301		2,187		4,494
Legal and professional	221		529		5,924		6,674
Loan and foreclosure costs	261		1,171		1,273		2,705
FDIC assessment	—		—		9,708		9,708
Other intangible amortization	—		—		2,203		2,203
Other noninterest expense	934		8,024		716		9,674
Allocated indirect expense (income)	32,166		63,408		(95,574)		—
Total noninterest expense	56,021		153,331		—		209,352
Net income (loss) before income taxes	71,236		104,137		(35,744)		139,629
Income tax expense (benefit)	13,211		21,869		(6,681)		28,399
Net income (loss)	$	58,025	$	82,268	$	(29,063)	$	111,230
Loans	$	17,617,892	$	12,531,178	$	458,535	$	30,607,605
Allocated goodwill	525,836		579,156		—		1,104,992
Total assets	17,907,721		13,043,969		13,042,039		43,993,729

a) A portion of total depreciation expense of $0.1 million, $5.9 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

	Six Months Ended Jun 30, 2026
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income	$	498,429	$	154,917	$	23,882	$	677,228
Net intersegment interest (expense) income	(208,353)		266,076		(57,723)		—
Net interest income (expense)	290,076		420,993		(33,841)		677,228
Noninterest income	29,540		112,380		14,336		156,256
Total income (expense) before provision	319,616		533,373		(19,505)		833,484
Provision for credit losses	41,947		13,391		(24,949)		30,389
Total income after provision	277,669		519,982		5,444		803,095
Noninterest expense
Personnel	48,145		130,410		117,786		296,341
Technology(a)	2,116		27,978		32,509		62,603
Occupancy(a)	473		16,756		10,588		27,817
Business development and advertising	2,097		1,527		12,750		16,374
Equipment(a)	12		4,395		6,626		11,033
Legal and professional	529		2,160		21,487		24,176
Loan and foreclosure costs	721		2,236		302		3,259
FDIC assessment	—		—		19,432		19,432
Other intangible amortization	—		—		9,096		9,096
Other noninterest expense	1,808		18,058		1,048		20,914
Allocated indirect expense (income)	52,230		127,110		(179,340)		—
Total noninterest expense	108,131		330,630		52,284		491,045
Net income (loss) before income taxes	169,538		189,352		(46,840)		312,050
Income tax expense (benefit)	30,825		39,868		(1,843)		68,850
Net income (loss)	$	138,713	$	149,484	$	(44,997)	$	243,200

(a) A portion of total depreciation expense of $0.3 million, $12.5 million, and $11.9 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.

	Six Months Ended Jun 30, 2025
(in thousands)	Corporate and Commercial Specialty		Community, Consumer and Business		Risk Management and Shared Services		Consolidated Corporation
Net segment interest income (expense)	$	470,263	$	131,367	$	(15,690)	$	585,940
Net intersegment interest (expense) income	(203,557)		288,856		(85,299)		—
Net interest income (expense)	266,706		420,223		(100,989)		585,940
Noninterest income	24,887		100,560		307		125,754
Total income (expense) before provision	291,593		520,783		(100,682)		711,694
Provision for credit losses	39,382		12,434		(20,817)		30,999
Total income (expense) after provision	252,211		508,349		(79,865)		680,695
Noninterest expense
Personnel	41,475		116,513		92,902		250,890
Technology(a)	1,432		25,947		26,267		53,646
Occupancy(a)	336		15,820		11,869		28,025
Business development and advertising	2,186		1,805		10,143		14,134
Equipment(a)	12		4,331		4,678		9,021
Legal and professional	422		1,343		10,992		12,757
Loan and foreclosure costs	1,071		2,516		1,712		5,299
FDIC assessment	—		—		20,144		20,144
Other intangible amortization	—		—		4,405		4,405
Other noninterest expense	1,714		15,427		4,507		21,648
Allocated indirect expense (income)	63,505		124,114		(187,619)		—
Total noninterest expense	112,155		307,816		—		419,971
Net income (loss) before income taxes	140,056		200,533		(79,865)		260,724
Income tax expense (benefit)	25,997		42,112		(20,301)		47,808
Net income (loss)	$	114,059	$	158,421	$	(59,564)	$	212,916

(a) A portion of total depreciation expense of $0.1 million, $11.8 million, and $14.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and

Risk Management and Shared Services segments, respectively, is included in this expense caption.

Expenses included within the other noninterest expense line of the segment information above relate to the remaining segment expenses including office expense and card issuance costs. None of the individual expense categories rise to the level of significance for the segment; however, they are utilized in determining the profit or loss measure for each segment.

The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to U.S. GAAP. As a result, reportable segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, the information presented is not indicative of how the segments would perform if they operated as independent entities.

The chief operating decision maker for each of the segments is the President and Chief Executive Officer of the Corporation. For the Corporate and Commercial Specialty and Community, Consumer and Business segments, the chief operating decision maker utilizes net interest income, net income and average total loans and deposits in allocating resources for each segment predominantly in the annual budget and forecasting process. The chief operating decision maker considers budget-to-actual variances on a monthly basis for both profit measures when making decisions about allocating capital and personnel to the segments. Based on the reviews of these two segments and other company-wide initiatives, the chief operating decision maker is informed about allocation of resources to the Risk Management and Shared Services segment.

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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

6 Months Ended

Jun. 30, 2026

Jun. 30, 2026

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Summary of activity in accumulated other comprehensive income (loss)

(in thousands)	AFS Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive (Loss) Income
Balance March 31, 2026	$	(28,608)	$	2,153	$	(18,050)	$	(44,505)
Other comprehensive loss before reclassifications	(36,846)		—		—		(36,846)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities	1,901		—		—		1,901
Other assets / accrued expenses and other liabilities	—		(6,506)		—		(6,506)
Interest income	—		(597)		—		(597)
Personnel expense	—		—		(63)		(63)
Income tax benefit (expense)	8,717		(1,709)		15		7,023
Net other comprehensive loss during period	(26,228)		(8,812)		(48)		(35,088)
Balance June 30, 2026	$	(54,836)	$	(6,659)	$	(18,098)	$	(79,593)
Balance March 31, 2025	$	(23,655)	$	9,135	$	(20,624)	$	(35,144)
Other comprehensive income before reclassifications	21,317		—		—		21,317
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities	2,059		—		—		2,059
Other assets / accrued expenses and other liabilities	—		1,264		—		1,264
Interest income	—		1,437		—		1,437
Personnel expense	—		—		(63)		(63)
Other expense	—		—		(4)		(4)
Income tax (expense) benefit	(5,830)		650		17		(5,164)
Net other comprehensive income (loss) during period	17,545		3,352		(50)		20,847
Balance June 30, 2025	$	(6,109)	$	12,487	$	(20,674)	$	(14,297)

The following table summarizes the components of accumulated other comprehensive income (loss) at June 30, 2026 and 2025, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):

(in thousands)	Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2025	$	(2,456)	$	12,894	$	(18,003)	$	(7,566)
Other comprehensive loss before reclassifications	(73,377)		—		—		(73,377)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities	3,590		—		—		3,590
Other assets / accrued expenses and other liabilities	—		(14,418)		—		(14,418)
Interest expense	—		(1,343)		—		(1,343)
Personnel expense	—		—		(126)		(126)
Income tax benefit (expense)	17,407		(3,792)		31		13,647
Net other comprehensive loss during period	(52,380)		(19,553)		(95)		(72,027)
Balance June 30, 2026	$	(54,836)	$	(6,659)	$	(18,098)	$	(79,593)
Balance December 31, 2024	$	(48,993)	$	(1,268)	$	(24,154)	$	(74,416)
Other comprehensive income before reclassifications	53,149		—		4,770		57,919
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities	3,986		—		—		3,986
Other assets / accrued expenses and other liabilities	—		8,532		—		8,532
Interest income	—		2,555		—		2,555
Personnel expense	—		—		(126)		(126)
Other expense	—		—		(8)		(8)
Income tax (expense) benefit	(14,251)		2,668		(1,157)		(12,740)
Net other comprehensive income during period	42,884		13,755		3,480		60,119
Balance June 30, 2025	$	(6,109)	$	12,487	$	(20,674)	$	(14,297)

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Business Combinations - Consideration and Narrative (Details) - American National [Member] $ / shares in Units, $ in Thousands	Apr. 01, 2026 USD ($) $ / shares shares
Business Combination, Consideration Transferred, Equity Interest [Line Items]
Effective Date of Acquisition	Apr. 01, 2026
Business Combination, Name of Acquiree	American National
Business Combination, Control Obtained, Description	Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) immediately following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.
Business Combination, Voting Equity Interest Acquired, Percentage	100.00%
Business Combination, Description of Acquiree	American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets.
Business Combination, Reason for Business Combination	As a result of the acquisition, the Corporation increased its deposit market share and will deliver its products and services to an expanded client base across attractive Midwest markets.
Business Combination, Consideration Transferred, Equity Interest | $	$ 594,100
Business Combination, Price Per Share | $ / shares	$ 25.86
Business Acquisition Equity Consideration Per Share Conversion Ratio	36.250
Stock Issued During Period, Shares, Acquisitions	22,975,382

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Business Combinations - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Apr. 01, 2026	Jun. 30, 2026	Dec. 31, 2025
Business Combination [Line Items]
Goodwill	$ 42,100	$ 1,147,081	$ 1,104,992
American National [Member]
Business Combination [Line Items]
Business Combination, Consideration Transferred	594,144
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent	220,898
Business Combination, Recognized Asset Acquired, Investment in Debt and Equity Securities, Current	989,925
Business Combination, Recognized Asset Acquired, Receivable, Current	3,716,472
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived	103,200
Business Combination, Recognized Asset Acquired, Other Asset, Current	155,960
Business Combination, Recognized Asset Acquired, Asset, Current	5,186,455
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deposits	4,544,700
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent	89,700
Business Combination, Recognized Liability Assumed, Liability	4,634,400
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)	552,055
Goodwill	$ 42,089

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Business Combinations - Schedules of Financing receivables Purchased Seasoned Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Apr. 01, 2026	Dec. 31, 2025
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 36,467,040		$ 31,163,614
American National [Member]
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		$ 3,801,050
Financing Receivable, Unamortized Purchase Premium (Discount)		(16,803)
Financing Receivable, before Allowance for Credit Loss		3,784,247
Financing Receivable, Allowance for Credit Loss		(67,775)
Financing Receivable, after Allowance for Credit Loss		3,716,472
American National [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		615,403
Financing Receivable, Unamortized Purchase Premium (Discount)		(19,495)
Financing Receivable, before Allowance for Credit Loss		595,908
Financing Receivable, Allowance for Credit Loss		(39,512)
Financing Receivable, after Allowance for Credit Loss		556,396
American National [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member]
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		3,185,647
Financing Receivable, Unamortized Purchase Premium (Discount)		2,692
Financing Receivable, before Allowance for Credit Loss		3,188,339
Financing Receivable, Allowance for Credit Loss		(28,263)
Financing Receivable, after Allowance for Credit Loss		$ 3,160,076

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Business Combinations - Transaction Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Business Combination, Separately Recognized Transaction [Line Items]
Labor and Related Expense	$ 161,168	$ 126,994	$ 296,341	$ 250,890
Information Technology and Data Processing	32,867	26,508	62,603	53,646
Occupancy, Net	14,091	12,644	27,817	28,025
Marketing and Advertising Expense	8,548	7,748	16,374	14,134
Equipment Expense	5,423	4,494	11,033	9,021
Professional Fees	17,454	6,674	24,176	12,757
Other Noninterest Expense	13,290	$ 9,674	20,914	$ 21,648
American National [Member]
Business Combination, Separately Recognized Transaction [Line Items]
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed			25,500
American National [Member] | Other Expense [Member]
Business Combination, Separately Recognized Transaction [Line Items]
Labor and Related Expense	13,364		13,364
Information Technology and Data Processing	781		781
Occupancy, Net	23		103
Marketing and Advertising Expense	417		654
Equipment Expense	98		98
Professional Fees	9,569		10,253
Other Noninterest Expense	217		223
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed	$ 24,469		$ 25,476

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Business Combinations - Pro Forma (Details) - American National [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Business Combination, Pro Forma Information [Line Items]
Business Combination, Pro Forma Information, Pro Forma Revenue	$ 447,151	$ 415,810	$ 881,852	$ 807,328
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax	$ 141,691	$ 120,532	263,217	$ 212,961
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed			$ 25,500

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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 123,564	$ 119,635	$ 111,230	$ 101,687	$ 243,200	$ 212,916
Preferred Stock Dividends and Other Adjustments	(2,875)		(2,875)		(5,750)	(5,750)
Net Income (Loss) Available to Common Stockholders, Basic	120,689		108,355		237,450	207,166
Dividends, Common Stock	(45,634)		(38,304)		(85,577)	(76,636)
Unvested Share based Payment Awards	(107)		(194)		(223)	(399)
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	74,769		69,501		151,203	129,500
Undistributed Earnings Allocated To Unvested Share Based Payment Awards	179		356		447	630
Undistributed Earnings, Basic, Total	74,948		69,857		151,650	130,131
Earnings Per Share, Basic [Abstract]
Distributed Earnings	45,634		38,304		85,577	76,636
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	74,769		69,501		151,203	129,500
Common Shareholders Earnings Basic	120,403		107,805		236,780	206,137
Earnings Per Share, Diluted [Abstract]
Distributed Earnings To Common Shareholders Diluted	45,634		38,304		85,577	76,636
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted	74,769		69,501		151,203	129,500
Common Shareholders Earnings Diluted	$ 120,403		$ 107,805		$ 236,780	$ 206,137
Weighted Average Number of Shares Outstanding, Basic	188,084		164,936		176,654	165,081
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements	1,815		1,407		1,748	1,425
Weighted Average Number of Shares Outstanding, Diluted, Total	189,899		166,343		178,402	166,506
Earnings Per Share, Basic	$ 0.64		$ 0.65		$ 1.34	$ 1.25
Earnings Per Share, Diluted	$ 0.63		$ 0.65		$ 1.33	$ 1.24

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Earnings Per Common Share (Details Textuals) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1.4		1.2

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Stock-Based Compensation, Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance	1,460
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period	444
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance	1,016	1,460
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	1,016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 22.71
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	23.78
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	22.24	$ 22.71
Options Exercisable, Weighted Average Exercise Price (in usd per share)	$ 22.24
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	2 years 5 months 4 days	2 years 6 months 7 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	2 years 5 months 4 days	2 years 6 months 7 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 5 months 4 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value, Beginning Balance	$ 4,483
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value, Ending Balance	8,658	$ 4,483
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value	$ 8,658

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Stock-Based Compensation, Restricted Stock Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2026 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance | shares	2,372
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | shares	897
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period | shares	849
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares	47
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance | shares	2,373
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 22.02
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	26.49
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ / shares	22.01
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $ / shares	24.42
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 23.66

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Stock-Based Compensation (Details Textuals) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 2.3	$ 0.4
Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	150.00%
Performance-based Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	3 years	3 years
Service-based Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	4 years	4 years
Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-Based Payment Arrangement, Accelerated Cost	$ 4.2	$ 4.4
Share-Based Payment Arrangement, Expense	11.2	$ 11.3
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 28.1
Remaining requisite service periods, extend through	first quarter of 2030

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Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	$ 6,411,899	$ 5,367,813
Debt Securities, Available-for-Sale	6,366,586	5,397,563
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(49,001)	(11,551)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	3,688	41,301
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,510,775	3,602,576
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	1,859	3,488
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(420,816)	(415,070)
Debt Securities, Held-to-Maturity, Fair Value	3,091,818	3,190,994
Equity securities	15,000	15,000
US Treasury Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	997	996
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	5	19
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	0	0
Debt Securities, Held-to-Maturity, Fair Value	1,002	1,015
US Treasury Securities | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	997	996
Debt Securities, Held-to-Maturity, Fair Value	1,002	1,015
US Treasury Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Fair Value	0	0
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	7,342	3,063
Debt Securities, Available-for-Sale	7,240	3,044
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(106)	(20)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	4	1
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,591,681	1,628,088
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	1,797	3,070
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(124,874)	(123,856)
Debt Securities, Held-to-Maturity, Fair Value	1,468,604	1,507,302
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	7,240	3,044
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,591,681	1,628,088
Debt Securities, Held-to-Maturity, Fair Value	1,468,604	1,507,302
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	7,240	3,044
Debt Securities, Held-to-Maturity, Fair Value	1,468,604	1,507,302
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	0
Debt Securities, Available-for-Sale	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	292,007	302,817
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(45,547)	(43,990)
Debt Securities, Held-to-Maturity, Fair Value	246,460	258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	89,197	95,977
Debt Securities, Available-for-Sale	88,212	95,046
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(986)	(950)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	1	19
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	88,212	95,046
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	88,212	95,046
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	120,221	283
Debt Securities, Available-for-Sale	120,070	269
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(538)	(14)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	387	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	120,070	269
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	120,070	269
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	6,750	3,000
Debt Securities, Available-for-Sale	5,063	2,998
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(1,687)	(2)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	142,709	134,142
Debt Securities, Available-for-Sale	137,288	129,863
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(6,236)	(5,493)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	815	1,214
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	790,729	823,630
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	39	165
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(130,031)	(127,333)
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	137,288	129,863
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	790,729	823,630
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	137,288	129,863
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	414,880	17,959
Debt Securities, Available-for-Sale	410,221	16,958
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(4,659)	(1,001)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	757,723	763,370
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(113,423)	(113,004)
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	410,221	16,958
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	757,723	763,370
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	410,221	16,958
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	5,518,890	5,000,015
Debt Securities, Available-for-Sale	5,491,648	5,039,829
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(29,723)	(253)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	2,481	40,067
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	37,215	39,123
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	18	82
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(2,607)	(2,321)
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	5,491,648	5,039,829
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	37,215	39,123
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	5,491,648	5,039,829
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	111,910	113,374
Debt Securities, Available-for-Sale	106,844	109,556
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(5,066)	(3,818)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	40,423	44,552
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	0	152
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(4,334)	(4,566)
Debt Securities, Held-to-Maturity, Fair Value	36,089	40,138
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	106,844	109,556
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	40,423	44,552
Debt Securities, Held-to-Maturity, Fair Value	36,089	40,138
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale	106,844	109,556
Debt Securities, Held-to-Maturity, Fair Value	$ 36,089	$ 40,138

XML

Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Amortized Cost
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One	$ 3,750
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	7,739
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	0
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10	2,603
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost	14,092
Available for Sale, Total debt securities	6,411,899	$ 5,367,813
Fair Value
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	2,063
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	7,655
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	0
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	2,585
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value	12,303
Available for Sale, Total debt securities	$ 6,366,586	5,397,563
Ratio of Fair Value to Amortized Cost, AFS	99.30%
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One	$ 820,235
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five	825
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10	8,078
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10	763,540
Held to Maturity, Total Debt Securities	1,592,678
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,510,775	3,602,576
Fair Value
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	818,331
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	779
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	7,932
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	642,564
Held to Maturity, Securities, Debt Securities	1,469,606
Debt Securities, Held-to-Maturity, Fair Value	$ 3,091,818	3,190,994
Ratio of Fair Value to Amortized Cost, HTM	88.10%
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Amortized Cost
Available for Sale, Total debt securities	$ 0
Fair Value
Available for Sale, Total debt securities	0
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	292,007	302,817
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	246,460	258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Amortized Cost
Available for Sale, Total debt securities	89,197	95,977
Fair Value
Available for Sale, Total debt securities	88,212	95,046
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	120,221	283
Fair Value
Available for Sale, Total debt securities	120,070	269
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	0
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	142,709	134,142
Fair Value
Available for Sale, Total debt securities	137,288	129,863
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	790,729	823,630
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	414,880	17,959
Fair Value
Available for Sale, Total debt securities	410,221	16,958
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	757,723	763,370
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	5,518,890	5,000,015
Fair Value
Available for Sale, Total debt securities	5,491,648	5,039,829
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	37,215	39,123
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	111,910	113,374
Fair Value
Available for Sale, Total debt securities	106,844	109,556
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	40,423	44,552
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	$ 36,089	$ 40,138

XML

Investment Securities, HTM Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 3,510,775	$ 3,602,576
US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	997	996
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,591,681	1,628,088
Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	790,729	823,630
Residential Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	37,215	39,123
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	292,007	302,817
Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	757,723	763,370
Commercial Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 40,423	$ 44,552

XML

Investment Securities Gain/Loss Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract]
Equity Securities, FV-NI	$ 35	$ 7	$ 10	$ 11
Debt Securities, Realized Gain (Loss)	35	7	6	11
Gross losses on HTM securities	$ 0	$ 0	$ (4)	$ 0

XML

Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Jun. 30, 2026 USD ($) security	Dec. 31, 2025 USD ($) security
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	296	32
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (36,456)	$ (481)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,965,951	$ 193,126
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	38	47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (12,545)	$ (11,070)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	221,750	242,062
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(49,001)	(11,551)
Debt Securities, Available-for-sale, Unrealized Loss Position	5,187,701	435,188
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(7,599)	(3,448)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	548,115	116,143
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(413,217)	(411,622)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	2,180,415	2,472,681
Total unrealized losses on held to maturity securities	(420,816)	(415,070)
Total fair value of unrealized losses on held to maturity securities	$ 2,728,530	$ 2,588,824
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	4	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (99)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,176	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (7)	$ (20)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	243	863
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(106)	(20)
Debt Securities, Available-for-sale, Unrealized Loss Position	4,419	863
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6,876)	(2,978)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	500,662	89,826
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(117,998)	(120,878)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	615,514	842,485
Total unrealized losses on held to maturity securities	(124,874)	(123,856)
Total fair value of unrealized losses on held to maturity securities	1,116,176	932,311
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(45,547)	(43,990)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	246,460	258,827
Total unrealized losses on held to maturity securities	(45,547)	(43,990)
Total fair value of unrealized losses on held to maturity securities	$ 246,460	$ 258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (75)	$ (152)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 30,893	$ 33,239
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	12	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (911)	$ (798)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	51,501	55,565
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(986)	(950)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 82,394	$ 88,804
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	6	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (526)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 89,501	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (12)	$ (14)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	183	231
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(538)	(14)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 89,684	$ 231
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	3	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,687)	$ (2)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,062	$ 1,998
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,687)	(2)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 4,062	$ 1,998
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	34	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (604)	$ (95)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 47,975	$ 14,155
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	5	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (5,632)	$ (5,398)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	44,189	56,215
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(6,236)	(5,493)
Debt Securities, Available-for-sale, Unrealized Loss Position	92,164	70,370
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(127)	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	15,968	30
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(129,904)	(127,333)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	637,637	676,915
Total unrealized losses on held to maturity securities	(130,031)	(127,333)
Total fair value of unrealized losses on held to maturity securities	$ 653,605	$ 676,945
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	11	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (3,780)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 393,331	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (879)	$ (1,001)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	16,889	16,958
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,659)	(1,001)
Debt Securities, Available-for-sale, Unrealized Loss Position	410,220	16,958
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(536)	(470)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	26,155	26,287
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(112,887)	(112,534)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	618,145	624,079
Total unrealized losses on held to maturity securities	(113,423)	(113,004)
Total fair value of unrealized losses on held to maturity securities	$ 644,300	$ 650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	236	16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (29,685)	$ (232)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,396,013	$ 143,734
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (38)	$ (21)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,901	2,674
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(29,723)	(253)
Debt Securities, Available-for-sale, Unrealized Loss Position	4,397,914	146,408
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(60)	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	5,330	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2,547)	(2,321)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	26,571	30,237
Total unrealized losses on held to maturity securities	(2,607)	(2,321)
Total fair value of unrealized losses on held to maturity securities	$ 31,901	$ 30,237
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	15	15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (5,066)	$ (3,818)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	106,844	109,556
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(5,066)	(3,818)
Debt Securities, Available-for-sale, Unrealized Loss Position	106,844	109,556
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(4,334)	(4,566)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	36,088	40,138
Total unrealized losses on held to maturity securities	(4,334)	(4,566)
Total fair value of unrealized losses on held to maturity securities	$ 36,088	$ 40,138
Held to maturity, number of securities, less than 12 months
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	348	84
Held to maturity, number of securities, less than 12 months | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	327	81
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	15	1
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	2	2
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	4	0
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, 12 months or more
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	660	799
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	407	543
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	18	18
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	100	102
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	43	43
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	79	80
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	13	13

XML

Investment Securities (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Investment Securities Information [Line Items]
Debt Instrument, Collateral Amount	$ 1,000,000	$ 1,200,000
Interest Receivable	181,916	161,118
Held to maturity allowance for credit loss	0	(100)
Federal Home Loan Bank Stock	215,000	154,400
Federal Reserve Bank Stock	114,400	98,100
Equity securities with readily determinable fair values, Fair Value	15,000	11,100
Equity securities	15,000	15,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	(1,700)	0
Held-to-maturity Securities [Member]
Investment Securities Information [Line Items]
Interest Receivable	17,200	17,700
Available-for-sale Securities [Member]
Investment Securities Information [Line Items]
Interest Receivable	25,100	23,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Investment Securities Information [Line Items]
Interest Receivable	4,100	2,800
Federal Reserve Bank Stock [Member]
Investment Securities Information [Line Items]
Interest Receivable	0
US Treasury Securities
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	0	0
US States and Political Subdivisions Debt Securities [Member]
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	0	0
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	$ 0	$ 0

XML

Loans Composition (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 36,467,040	$ 31,163,614
Commercial and Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,750,175	11,799,757
Commercial Real Estate Owner Occupied Portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,575,445	1,186,324
Commercial And Business Lending [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	15,325,620	12,986,081
Commercial Real Estate Investor Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,492,950	5,246,030
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,546,186	1,994,642
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	9,039,136	7,240,672
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	24,364,756	20,226,753
Residential Mortgage [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,808,398	6,793,957
Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,044,416	3,106,498
Home Equity Line of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	826,343	713,271
Other Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	423,127	323,135
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 12,102,284	$ 10,936,861

XML

Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 15,883	$ 29,616
Financing Receivable, Revolving	5,014,458	3,116,131
Financing Receivable, Originated in Current Fiscal Year	4,925,687	8,166,390
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,323,299	5,036,328
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,739,698	3,176,275
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,817,909	4,755,999
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,149,217	2,807,454
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,496,772	4,105,037
Financing Receivable, before Allowance for Credit Loss, Total	36,467,040	31,163,614
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	17,507	13,618
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	255	1,281
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1,451	10,882
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	1,476	6,954
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	2,353	20,237
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	2,216	1,115
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	9,234	866
Financing Receivable, Allowance for Credit Loss, Writeoff	34,492	54,953
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,844	19,486
Financing Receivable, Revolving	4,825,831	3,022,323
Financing Receivable, Originated in Current Fiscal Year	4,752,001	7,884,671
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,097,981	4,863,126
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,600,049	3,038,220
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,673,341	4,191,311
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,560,790	2,645,685
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,217,691	4,040,407
Financing Receivable, before Allowance for Credit Loss, Total	34,727,684	29,685,743
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	79	327
Financing Receivable, Revolving	28,354	12,330
Financing Receivable, Originated in Current Fiscal Year	34,079	64,024
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	38,391	23,510
Financing Receivable, Originated Two Years before Latest Fiscal Year	48,768	35,024
Financing Receivable, Originated Three Years before Latest Fiscal Year	60,612	116,368
Financing Receivable, Originated Four Years before Latest Fiscal Year	140,049	51,985
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	109,691	6,930
Financing Receivable, before Allowance for Credit Loss, Total	459,944	310,171
Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	668	7,290
Financing Receivable, Revolving	155,663	81,270
Financing Receivable, Originated in Current Fiscal Year	137,054	214,481
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	153,256	137,311
Financing Receivable, Originated Two Years before Latest Fiscal Year	79,600	94,774
Financing Receivable, Originated Three Years before Latest Fiscal Year	68,181	423,143
Financing Receivable, Originated Four Years before Latest Fiscal Year	424,264	100,093
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	111,441	16,200
Financing Receivable, before Allowance for Credit Loss, Total	1,129,459	1,067,272
Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	292	2,513
Financing Receivable, Revolving	4,610	208
Financing Receivable, Originated in Current Fiscal Year	2,553	3,214
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	33,671	12,381
Financing Receivable, Originated Two Years before Latest Fiscal Year	11,281	8,257
Financing Receivable, Originated Three Years before Latest Fiscal Year	15,775	25,177
Financing Receivable, Originated Four Years before Latest Fiscal Year	24,114	9,691
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	57,949	41,500
Financing Receivable, before Allowance for Credit Loss, Total	149,953	100,428
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,887	12,461
Financing Receivable, Revolving	4,023,830	2,233,015
Financing Receivable, Originated in Current Fiscal Year	3,848,831	6,608,437
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,559,828	3,942,739
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,588,428	2,130,374
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,852,509	2,839,853
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,293,210	1,266,791
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,198,120	1,205,544
Financing Receivable, before Allowance for Credit Loss, Total	24,364,756	20,226,753
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	13,356	5,424
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	135	831
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	160	8,983
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	254	3,852
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	712	16,465
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	425	379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	8,901	0
Financing Receivable, Allowance for Credit Loss, Writeoff	23,943	35,934
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,199	3,698
Financing Receivable, Revolving	3,838,187	2,142,980
Financing Receivable, Originated in Current Fiscal Year	3,680,977	6,330,026
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,339,776	3,775,243
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,456,788	2,001,877
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,720,453	2,293,440
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,721,148	1,115,063
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,970,926	1,182,658
Financing Receivable, before Allowance for Credit Loss, Total	22,728,255	18,841,287
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	27,367	11,139
Financing Receivable, Originated in Current Fiscal Year	33,995	63,702
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	37,027	23,066
Financing Receivable, Originated Two Years before Latest Fiscal Year	47,995	34,015
Financing Receivable, Originated Three Years before Latest Fiscal Year	59,697	115,634
Financing Receivable, Originated Four Years before Latest Fiscal Year	139,340	51,935
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	108,446	6,542
Financing Receivable, before Allowance for Credit Loss, Total	453,867	306,033
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	668	7,290
Financing Receivable, Revolving	154,030	78,896
Financing Receivable, Originated in Current Fiscal Year	131,699	214,481
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	153,256	136,731
Financing Receivable, Originated Two Years before Latest Fiscal Year	79,028	94,482
Financing Receivable, Originated Three Years before Latest Fiscal Year	67,815	423,014
Financing Receivable, Originated Four Years before Latest Fiscal Year	423,810	99,793
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	111,195	16,200
Financing Receivable, before Allowance for Credit Loss, Total	1,120,833	1,063,597
Commercial Portfolio Segment [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	20	1,473
Financing Receivable, Revolving	4,246	0
Financing Receivable, Originated in Current Fiscal Year	2,160	228
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	29,769	7,699
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,617	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,544	7,765
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,912	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,553	144
Financing Receivable, before Allowance for Credit Loss, Total	61,801	15,836
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,887	9,266
Financing Receivable, Revolving	2,859,539	1,996,941
Financing Receivable, Originated in Current Fiscal Year	2,370,009	3,950,522
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,875,412	2,183,997
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,784,347	1,169,773
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,009,346	1,407,631
Financing Receivable, Originated Four Years before Latest Fiscal Year	977,459	616,995
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	874,063	473,898
Financing Receivable, before Allowance for Credit Loss, Total	13,750,175	11,799,757
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	13,356	5,424
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	135	831
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	160	627
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	254	3,555
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	712	3,799
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	425	379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	6,191	0
Financing Receivable, Allowance for Credit Loss, Writeoff	21,233	14,615
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,199	503
Financing Receivable, Revolving	2,741,443	1,920,351
Financing Receivable, Originated in Current Fiscal Year	2,328,388	3,886,880
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,787,950	2,097,760
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,722,490	1,133,873
Financing Receivable, Originated Three Years before Latest Fiscal Year	982,648	1,238,941
Financing Receivable, Originated Four Years before Latest Fiscal Year	840,913	521,793
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	738,339	471,834
Financing Receivable, before Allowance for Credit Loss, Total	13,142,171	11,271,432
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	22,708	11,139
Financing Receivable, Originated in Current Fiscal Year	626	3,024
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	26,761	311
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,508	13,774
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,346	5,849
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,458	24,971
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	72,581	293
Financing Receivable, before Allowance for Credit Loss, Total	161,988	59,361
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	668	7,290
Financing Receivable, Revolving	94,753	65,451
Financing Receivable, Originated in Current Fiscal Year	38,835	60,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	33,522	78,773
Financing Receivable, Originated Two Years before Latest Fiscal Year	32,732	22,126
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,846	162,841
Financing Receivable, Originated Four Years before Latest Fiscal Year	130,614	70,231
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	58,326	1,771
Financing Receivable, before Allowance for Credit Loss, Total	401,628	461,786
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	20	1,473
Financing Receivable, Revolving	635	0
Financing Receivable, Originated in Current Fiscal Year	2,160	25
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	27,179	7,153
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,617	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,506	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	474	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,817	0
Financing Receivable, before Allowance for Credit Loss, Total	44,388	7,178
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	195,525	16,402
Financing Receivable, Originated in Current Fiscal Year	131,562	248,822
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	256,428	206,488
Financing Receivable, Originated Two Years before Latest Fiscal Year	219,089	162,321
Financing Receivable, Originated Three Years before Latest Fiscal Year	163,515	169,187
Financing Receivable, Originated Four Years before Latest Fiscal Year	198,237	169,766
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	411,089	213,338
Financing Receivable, before Allowance for Credit Loss, Total	1,575,445	1,186,324
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	113
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0	113
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	182,249	2,957
Financing Receivable, Originated in Current Fiscal Year	129,676	241,141
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	247,821	180,867
Financing Receivable, Originated Two Years before Latest Fiscal Year	199,462	141,254
Financing Receivable, Originated Three Years before Latest Fiscal Year	146,763	167,496
Financing Receivable, Originated Four Years before Latest Fiscal Year	197,576	157,837
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	380,833	201,588
Financing Receivable, before Allowance for Credit Loss, Total	1,484,380	1,093,140
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	1,363	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,713	11,620
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,016	5,432
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,059	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	90	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,980	1,242
Financing Receivable, before Allowance for Credit Loss, Total	19,221	18,294
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	11,913	13,445
Financing Receivable, Originated in Current Fiscal Year	1,886	7,478
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,097	14,001
Financing Receivable, Originated Two Years before Latest Fiscal Year	14,611	15,635
Financing Receivable, Originated Three Years before Latest Fiscal Year	14,693	1,691
Financing Receivable, Originated Four Years before Latest Fiscal Year	47	11,929
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	23,342	10,508
Financing Receivable, before Allowance for Credit Loss, Total	68,589	74,687
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	203
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,797	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	524	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	934	0
Financing Receivable, before Allowance for Credit Loss, Total	3,255	203
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,887	9,266
Financing Receivable, Revolving	3,055,064	2,013,343
Financing Receivable, Originated in Current Fiscal Year	2,501,571	4,199,344
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,131,840	2,390,485
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,003,436	1,332,094
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,172,861	1,576,818
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,175,696	786,761
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,285,152	687,236
Financing Receivable, before Allowance for Credit Loss, Total	15,325,620	12,986,081
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	13,356	5,424
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	135	831
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	160	627
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	254	3,668
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	712	3,799
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	425	379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	6,191	0
Financing Receivable, Allowance for Credit Loss, Writeoff	21,233	14,728
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,199	503
Financing Receivable, Revolving	2,923,692	1,923,308
Financing Receivable, Originated in Current Fiscal Year	2,458,064	4,128,021
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,035,771	2,278,627
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,921,952	1,275,127
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,129,411	1,406,437
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,038,489	679,630
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,119,172	673,422
Financing Receivable, before Allowance for Credit Loss, Total	14,626,551	12,364,572
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	24,071	11,139
Financing Receivable, Originated in Current Fiscal Year	626	3,024
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	31,474	11,931
Financing Receivable, Originated Two Years before Latest Fiscal Year	29,524	19,206
Financing Receivable, Originated Three Years before Latest Fiscal Year	11,405	5,849
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,548	24,971
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	78,561	1,535
Financing Receivable, before Allowance for Credit Loss, Total	181,209	77,655
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	668	7,290
Financing Receivable, Revolving	106,666	78,896
Financing Receivable, Originated in Current Fiscal Year	40,721	68,071
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35,619	92,774
Financing Receivable, Originated Two Years before Latest Fiscal Year	47,343	37,761
Financing Receivable, Originated Three Years before Latest Fiscal Year	27,539	164,532
Financing Receivable, Originated Four Years before Latest Fiscal Year	130,661	82,160
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	81,668	12,279
Financing Receivable, before Allowance for Credit Loss, Total	470,217	536,473
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	20	1,473
Financing Receivable, Revolving	635	0
Financing Receivable, Originated in Current Fiscal Year	2,160	228
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	28,976	7,153
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,617	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,506	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	998	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,751	0
Financing Receivable, before Allowance for Credit Loss, Total	47,643	7,381
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	3,195
Financing Receivable, Revolving	718,407	185,825
Financing Receivable, Originated in Current Fiscal Year	1,106,101	1,906,552
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,780,755	789,314
Financing Receivable, Originated Two Years before Latest Fiscal Year	689,885	526,061
Financing Receivable, Originated Three Years before Latest Fiscal Year	492,296	848,843
Financing Receivable, Originated Four Years before Latest Fiscal Year	799,524	477,039
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	905,982	512,396
Financing Receivable, before Allowance for Credit Loss, Total	6,492,950	5,246,030
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	8,356
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	184
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	12,666
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	2,710	0
Financing Receivable, Allowance for Credit Loss, Writeoff	2,710	21,206
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	3,195
Financing Receivable, Revolving	695,209	185,825
Financing Receivable, Originated in Current Fiscal Year	1,061,877	1,842,395
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,762,223	776,187
Financing Receivable, Originated Two Years before Latest Fiscal Year	662,819	503,511
Financing Receivable, Originated Three Years before Latest Fiscal Year	438,221	711,947
Financing Receivable, Originated Four Years before Latest Fiscal Year	679,245	432,442
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	844,791	503,468
Financing Receivable, before Allowance for Credit Loss, Total	6,144,385	4,955,775
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	633	0
Financing Receivable, Originated in Current Fiscal Year	33,369	40,067
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,553	11,135
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,066	14,809
Financing Receivable, Originated Three Years before Latest Fiscal Year	48,292	58,523
Financing Receivable, Originated Four Years before Latest Fiscal Year	58,136	26,964
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	29,885	5,007
Financing Receivable, before Allowance for Credit Loss, Total	178,934	156,505
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	21,867	0
Financing Receivable, Originated in Current Fiscal Year	10,855	24,090
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	12,186	1,446
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,000	7,741
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,783	70,608
Financing Receivable, Originated Four Years before Latest Fiscal Year	54,229	17,633
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	29,527	3,921
Financing Receivable, before Allowance for Credit Loss, Total	158,447	125,439
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	698	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	793	546
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	7,765
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,914	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,779	0
Financing Receivable, before Allowance for Credit Loss, Total	11,184	8,311
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	250,359	33,847
Financing Receivable, Originated in Current Fiscal Year	241,159	502,541
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	647,233	762,940
Financing Receivable, Originated Two Years before Latest Fiscal Year	895,107	272,219
Financing Receivable, Originated Three Years before Latest Fiscal Year	187,352	414,192
Financing Receivable, Originated Four Years before Latest Fiscal Year	317,990	2,991
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,986	5,912
Financing Receivable, before Allowance for Credit Loss, Total	2,546,186	1,994,642
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	219,286	33,847
Financing Receivable, Originated in Current Fiscal Year	161,036	359,610
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	541,782	720,429
Financing Receivable, Originated Two Years before Latest Fiscal Year	872,017	223,239
Financing Receivable, Originated Three Years before Latest Fiscal Year	152,821	175,056
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,414	2,991
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,963	5,768
Financing Receivable, before Allowance for Credit Loss, Total	1,957,319	1,520,940
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	2,663	0
Financing Receivable, Originated in Current Fiscal Year	0	20,611
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	15,405	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	51,262
Financing Receivable, Originated Four Years before Latest Fiscal Year	75,656	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss, Total	93,724	71,873
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	25,497	0
Financing Receivable, Originated in Current Fiscal Year	80,123	122,320
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	105,451	42,511
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,685	48,980
Financing Receivable, Originated Three Years before Latest Fiscal Year	34,493	187,874
Financing Receivable, Originated Four Years before Latest Fiscal Year	238,920	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss, Total	492,169	401,685
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	2,913	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	38	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	23	144
Financing Receivable, before Allowance for Credit Loss, Total	2,974	144
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	3,195
Financing Receivable, Revolving	968,766	219,672
Financing Receivable, Originated in Current Fiscal Year	1,347,260	2,409,093
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,427,988	1,552,254
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,584,992	798,280
Financing Receivable, Originated Three Years before Latest Fiscal Year	679,648	1,263,035
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,117,514	480,030
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	912,968	518,308
Financing Receivable, before Allowance for Credit Loss, Total	9,039,136	7,240,672
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	8,356
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	184
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	12,666
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	2,710	0
Financing Receivable, Allowance for Credit Loss, Writeoff	2,710	21,206
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	3,195
Financing Receivable, Revolving	914,495	219,672
Financing Receivable, Originated in Current Fiscal Year	1,222,913	2,202,005
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,304,005	1,496,616
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,534,836	726,750
Financing Receivable, Originated Three Years before Latest Fiscal Year	591,042	887,003
Financing Receivable, Originated Four Years before Latest Fiscal Year	682,659	435,433
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	851,754	509,236
Financing Receivable, before Allowance for Credit Loss, Total	8,101,704	6,476,715
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	3,296	0
Financing Receivable, Originated in Current Fiscal Year	33,369	60,678
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,553	11,135
Financing Receivable, Originated Two Years before Latest Fiscal Year	18,471	14,809
Financing Receivable, Originated Three Years before Latest Fiscal Year	48,292	109,785
Financing Receivable, Originated Four Years before Latest Fiscal Year	133,792	26,964
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	29,885	5,007
Financing Receivable, before Allowance for Credit Loss, Total	272,658	228,378
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	47,364	0
Financing Receivable, Originated in Current Fiscal Year	90,978	146,410
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	117,637	43,957
Financing Receivable, Originated Two Years before Latest Fiscal Year	31,685	56,721
Financing Receivable, Originated Three Years before Latest Fiscal Year	40,276	258,482
Financing Receivable, Originated Four Years before Latest Fiscal Year	293,149	17,633
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	29,527	3,921
Financing Receivable, before Allowance for Credit Loss, Total	650,616	527,124
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	3,611	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	793	546
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	38	7,765
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,914	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,802	144
Financing Receivable, before Allowance for Credit Loss, Total	14,158	8,455
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,996	17,155
Financing Receivable, Revolving	990,628	883,116
Financing Receivable, Originated in Current Fiscal Year	1,076,856	1,557,953
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,763,471	1,093,589
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,151,270	1,045,901
Financing Receivable, Originated Three Years before Latest Fiscal Year	965,400	1,916,146
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,856,007	1,540,663
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,298,652	2,899,493
Financing Receivable, before Allowance for Credit Loss, Total	12,102,284	10,936,861
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	4,151	8,194
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	120	450
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1,291	1,899
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	1,222	3,102
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	1,641	3,772
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	1,791	736
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	333	866
Financing Receivable, Allowance for Credit Loss, Writeoff	10,549	19,019
Consumer Loan [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,645	15,788
Financing Receivable, Revolving	987,644	879,343
Financing Receivable, Originated in Current Fiscal Year	1,071,024	1,554,645
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,758,205	1,087,883
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,143,261	1,036,343
Financing Receivable, Originated Three Years before Latest Fiscal Year	952,888	1,897,871
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,839,642	1,530,622
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,246,765	2,857,749
Financing Receivable, before Allowance for Credit Loss, Total	11,999,429	10,844,456
Consumer Loan [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	79	327
Financing Receivable, Revolving	987	1,191
Financing Receivable, Originated in Current Fiscal Year	84	322
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,364	444
Financing Receivable, Originated Two Years before Latest Fiscal Year	773	1,009
Financing Receivable, Originated Three Years before Latest Fiscal Year	915	734
Financing Receivable, Originated Four Years before Latest Fiscal Year	709	50
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,245	388
Financing Receivable, before Allowance for Credit Loss, Total	6,077	4,138
Consumer Loan [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	1,633	2,374
Financing Receivable, Originated in Current Fiscal Year	5,355	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	580
Financing Receivable, Originated Two Years before Latest Fiscal Year	572	292
Financing Receivable, Originated Three Years before Latest Fiscal Year	366	129
Financing Receivable, Originated Four Years before Latest Fiscal Year	454	300
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	246	0
Financing Receivable, before Allowance for Credit Loss, Total	8,626	3,675
Consumer Loan [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	272	1,040
Financing Receivable, Revolving	364	208
Financing Receivable, Originated in Current Fiscal Year	393	2,986
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,902	4,682
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,664	8,257
Financing Receivable, Originated Three Years before Latest Fiscal Year	11,231	17,412
Financing Receivable, Originated Four Years before Latest Fiscal Year	15,202	9,691
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	50,396	41,356
Financing Receivable, before Allowance for Credit Loss, Total	88,152	84,592
Consumer Loan [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	181,627	255,789
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	312,089	242,469
Financing Receivable, Originated Two Years before Latest Fiscal Year	259,029	485,469
Financing Receivable, Originated Three Years before Latest Fiscal Year	446,875	1,501,605
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,472,687	1,508,508
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,136,091	2,800,117
Financing Receivable, before Allowance for Credit Loss, Total	6,808,398	6,793,957
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	6	115
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	57	209
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	66	320
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	24	74
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	107	430
Financing Receivable, Allowance for Credit Loss, Writeoff	260	1,148
Consumer Loan [Member] | Residential Mortgage [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	176,272	253,364
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	309,720	238,787
Financing Receivable, Originated Two Years before Latest Fiscal Year	254,049	480,076
Financing Receivable, Originated Three Years before Latest Fiscal Year	438,829	1,488,335
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,461,192	1,499,223
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,090,505	2,764,379
Financing Receivable, before Allowance for Credit Loss, Total	6,730,567	6,724,164
Consumer Loan [Member] | Residential Mortgage [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	315
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	188
Financing Receivable, before Allowance for Credit Loss, Total	503
Consumer Loan [Member] | Residential Mortgage [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	5,355	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	580
Financing Receivable, Originated Two Years before Latest Fiscal Year	572	292
Financing Receivable, Originated Three Years before Latest Fiscal Year	366	129
Financing Receivable, Originated Four Years before Latest Fiscal Year	454	300
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	246	0
Financing Receivable, before Allowance for Credit Loss, Total	6,993	1,301
Consumer Loan [Member] | Residential Mortgage [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	2,425
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,054	3,102
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,408	5,101
Financing Receivable, Originated Three Years before Latest Fiscal Year	7,680	13,141
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,041	8,985
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	45,152	35,738
Financing Receivable, before Allowance for Credit Loss, Total	70,335	68,492
Consumer Loan [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	857,404	1,288,121
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,401,367	844,519
Financing Receivable, Originated Two Years before Latest Fiscal Year	869,717	555,174
Financing Receivable, Originated Three Years before Latest Fiscal Year	503,081	391,940
Financing Receivable, Originated Four Years before Latest Fiscal Year	355,263	26,742
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	57,584	2
Financing Receivable, before Allowance for Credit Loss, Total	4,044,416	3,106,498
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	110	432
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1,125	1,699
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	1,135	2,804
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	1,547	3,384
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	1,742	433
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	179	0
Financing Receivable, Allowance for Credit Loss, Writeoff	5,838	8,752
Consumer Loan [Member] | Automobile Loan [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	856,927	1,287,267
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,398,649	842,838
Financing Receivable, Originated Two Years before Latest Fiscal Year	867,078	551,549
Financing Receivable, Originated Three Years before Latest Fiscal Year	498,862	388,064
Financing Receivable, Originated Four Years before Latest Fiscal Year	351,555	26,402
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	57,048	2
Financing Receivable, before Allowance for Credit Loss, Total	4,030,119	3,096,122
Consumer Loan [Member] | Automobile Loan [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	84	295
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,032	325
Financing Receivable, Originated Two Years before Latest Fiscal Year	581	814
Financing Receivable, Originated Three Years before Latest Fiscal Year	868	621
Financing Receivable, Originated Four Years before Latest Fiscal Year	625	50
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	134	0
Financing Receivable, before Allowance for Credit Loss, Total	3,324	2,105
Consumer Loan [Member] | Automobile Loan [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	393	559
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,686	1,356
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,058	2,811
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,351	3,255
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,083	290
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	402	0
Financing Receivable, before Allowance for Credit Loss, Total	10,973	8,271
Consumer Loan [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,911	16,612
Financing Receivable, Revolving	727,169	624,078
Financing Receivable, Originated in Current Fiscal Year	1,158	857
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,355	2,528
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,218	3,251
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,045	21,634
Financing Receivable, Originated Four Years before Latest Fiscal Year	22,332	5,147
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	61,066	55,776
Financing Receivable, before Allowance for Credit Loss, Total	826,343	713,271
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	60	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	26
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	2	5
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	13	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	16	380
Financing Receivable, Allowance for Credit Loss, Writeoff	92	416
Consumer Loan [Member] | Home Equity Line of Credit [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,561	15,259
Financing Receivable, Revolving	726,750	623,853
Financing Receivable, Originated in Current Fiscal Year	1,158	855
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,253	2,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,937	2,728
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,886	20,514
Financing Receivable, Originated Four Years before Latest Fiscal Year	21,268	4,733
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	55,324	49,793
Financing Receivable, before Allowance for Credit Loss, Total	818,576	704,664
Consumer Loan [Member] | Home Equity Line of Credit [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	78	315
Financing Receivable, Revolving	102	52
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	119
Financing Receivable, Originated Two Years before Latest Fiscal Year	130	190
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	104
Financing Receivable, Originated Four Years before Latest Fiscal Year	39	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	914	368
Financing Receivable, before Allowance for Credit Loss, Total	1,185	833
Consumer Loan [Member] | Home Equity Line of Credit [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	272	1,038
Financing Receivable, Revolving	317	173
Financing Receivable, Originated in Current Fiscal Year	0	2
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	102	221
Financing Receivable, Originated Two Years before Latest Fiscal Year	151	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	159	1,016
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,025	414
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,828	5,615
Financing Receivable, before Allowance for Credit Loss, Total	6,582	7,774
Consumer Loan [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	85	543
Financing Receivable, Revolving	263,459	259,038
Financing Receivable, Originated in Current Fiscal Year	36,667	13,186
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44,660	4,073
Financing Receivable, Originated Two Years before Latest Fiscal Year	18,306	2,007
Financing Receivable, Originated Three Years before Latest Fiscal Year	10,399	967
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,725	266
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	43,911	43,598
Financing Receivable, before Allowance for Credit Loss, Total	423,127	323,135
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	4,150	8,194
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	10	18
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	100	85
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	30	63
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	26	63
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	12	224
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	31	56
Financing Receivable, Allowance for Credit Loss, Writeoff	4,359	8,703
Consumer Loan [Member] | Other Consumer [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	84	529
Financing Receivable, Revolving	260,894	255,490
Financing Receivable, Originated in Current Fiscal Year	36,667	13,159
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44,583	4,070
Financing Receivable, Originated Two Years before Latest Fiscal Year	18,197	1,990
Financing Receivable, Originated Three Years before Latest Fiscal Year	10,311	958
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,627	264
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	43,888	43,575
Financing Receivable, before Allowance for Credit Loss, Total	420,167	319,506
Consumer Loan [Member] | Other Consumer [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1	12
Financing Receivable, Revolving	885	1,139
Financing Receivable, Originated in Current Fiscal Year	0	27
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	62	5
Financing Receivable, Originated Three Years before Latest Fiscal Year	47	9
Financing Receivable, Originated Four Years before Latest Fiscal Year	45	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9	20
Financing Receivable, before Allowance for Credit Loss, Total	1,065	1,200
Consumer Loan [Member] | Other Consumer [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	1,633	2,374
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss, Total	1,633	2,374
Consumer Loan [Member] | Other Consumer [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	2
Financing Receivable, Revolving	47	35
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	60	3
Financing Receivable, Originated Two Years before Latest Fiscal Year	47	12
Financing Receivable, Originated Three Years before Latest Fiscal Year	41	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	53	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14	3
Financing Receivable, before Allowance for Credit Loss, Total	$ 262	$ 55

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Loans Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 36,467,040	$ 36,467,040	$ 31,163,614
Financing Receivable, Nonaccrual	149,953	149,953	100,428
Nonaccrual Loans, Current Portion	$ 78,900	$ 78,900	$ 31,200
Percent of current nonaccrual loans	53.00%	53.00%	31.00%
Financing Receivable, Nonaccrual, Interest Income	$ 0	$ 0	$ 0
Financing Receivable, Nonaccrual, No Allowance	18,200	18,200	14,600
Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	13,750,175	13,750,175	11,799,757
Financing Receivable, Nonaccrual	44,388	44,388	7,178
Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,575,445	1,575,445	1,186,324
Financing Receivable, Nonaccrual	3,255	3,255	203
Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	15,325,620	15,325,620	12,986,081
Financing Receivable, Nonaccrual	47,643	47,643	7,381
Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	6,492,950	6,492,950	5,246,030
Financing Receivable, Nonaccrual	11,184	11,184	8,311
Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,546,186	2,546,186	1,994,642
Financing Receivable, Nonaccrual	2,974	2,974	144
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	9,039,136	9,039,136	7,240,672
Financing Receivable, Nonaccrual	14,158	14,158	8,455
Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	24,364,756	24,364,756	20,226,753
Financing Receivable, Nonaccrual	61,801	61,801	15,836
Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	6,808,398	6,808,398	6,793,957
Financing Receivable, Nonaccrual	70,335	70,335	68,492
Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	4,044,416	4,044,416	3,106,498
Financing Receivable, Nonaccrual	10,973	10,973	8,271
Home Equity Line of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	826,343	826,343	713,271
Financing Receivable, Nonaccrual	6,582	6,582	7,774
Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	423,127	423,127	323,135
Financing Receivable, Nonaccrual	262	262	55
Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	12,102,284	12,102,284	10,936,861
Financing Receivable, Nonaccrual	88,152	88,152	84,592
Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	36,256,787	36,256,787	31,002,071
Financial Asset, Not Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	13,694,693	13,694,693	11,789,526
Financial Asset, Not Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,571,158	1,571,158	1,186,087
Financial Asset, Not Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	15,265,851	15,265,851	12,975,613
Financial Asset, Not Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	6,478,677	6,478,677	5,218,314
Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,541,775	2,541,775	1,994,381
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	9,020,452	9,020,452	7,212,695
Financial Asset, Not Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	24,286,303	24,286,303	20,188,308
Financial Asset, Not Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	6,724,029	6,724,029	6,712,330
Financial Asset, Not Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	4,013,076	4,013,076	3,081,782
Financial Asset, Not Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	815,225	815,225	701,719
Financial Asset, Not Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	418,154	418,154	317,932
Financial Asset, Not Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	11,970,484	11,970,484	10,813,763
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	39,971	39,971	48,311
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	834	834	2,153
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	893	893	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,727	1,727	2,153
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,839	1,839	14,148
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	581	581	117
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,420	2,420	14,265
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	4,147	4,147	16,418
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	13,531	13,531	13,135
Financial Asset, 30 to 59 Days Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	17,043	17,043	14,340
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	3,351	3,351	2,945
Financial Asset, 30 to 59 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,899	1,899	1,473
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	35,824	35,824	31,893
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	18,041	18,041	9,990
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	9,834	9,834	530
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	34
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	9,834	9,834	564
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,250	1,250	5,257
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	856	856	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,106	2,106	5,257
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	11,940	11,940	5,821
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	503	503	0
Financial Asset, 60 to 89 Days Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	3,324	3,324	2,105
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,185	1,185	833
Financial Asset, 60 to 89 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,089	1,089	1,231
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	6,101	6,101	4,169
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,288	2,288	2,814
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	426	426	370
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	139	139	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	565	565	370
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	565	565	370
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,723	1,723	2,444
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 1,723	$ 1,723	$ 2,444

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Loans, Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term, Range, From	300 months	268 months	305 months	267 months
Financing Receivable, Modified, Weighted Average Term, Range, To	418 months	426 months	412 months	414 months
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 847	$ 891	$ 1,603	$ 1,823
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(9.00%)	(10.00%)	(6.00%)	(8.00%)
Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	118 months	158 months	107 months	147 months
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,174	$ 658	$ 3,551	$ 2,219
Commercial and Industrial Sector | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 120	$ 154	$ 273	$ 294
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(22.00%)	(23.00%)	(22.00%)	(24.00%)
Residential Mortgage [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	0.00%	2.00%	1.00%	1.00%
Residential Mortgage [Member] | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 553	$ 305	$ 1,059	$ 305
Financing Receivable, Modified, Weighted Average Term Increase from Modification	115 months	165 months	107 months	152 months
Residential Mortgage [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,137	$ 591	$ 3,463	$ 2,094
Home Equity Line of Credit [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(2.00%)	0.00%	(2.00%)	(2.00%)
Home Equity Line of Credit [Member] | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	240 months	60 months	131 months	60 months
Home Equity Line of Credit [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 37	$ 67	$ 88	$ 125
Other Consumer [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 727	$ 737	$ 1,330	$ 1,529
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(22.00%)	(21.00%)	(21.00%)	(21.00%)

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Loans, Modifications in Last 12 Months, Performance - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 9,170	$ 6,427
Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	943	635
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,210	702
Commercial and Industrial Sector | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	367	431
Commercial and Industrial Sector | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0	0
Commercial and Industrial Sector | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0	0
Residential Mortgage [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	6,509	3,406
Residential Mortgage [Member] | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	943	605
Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,183	702
Home Equity Line of Credit [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	239	288
Home Equity Line of Credit [Member] | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0	31
Home Equity Line of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	27	0
Other Consumer [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	2,055	2,303
Other Consumer [Member] | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0	0
Other Consumer [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0

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Loans, Modified, Subsequent Default (Details) - Residential Mortgage [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2026 USD ($)
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 0
Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 303

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Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ 34,492		$ 54,953
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			1,871
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			3,597
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			41,276	$ 38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			4,000		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 50,744		50,744		41,276
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			34,492		54,953
Provision for Loan, Lease, and Other Losses	19,388	$ 17,996	30,389	30,999
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			378,068	363,545	363,545
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			26,000		51,500
Financing Receivable, Allowance for Credit Loss, Ending Balance	443,729		443,729		378,068
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			39,512
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			28,263
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			397
Allowance for Loan Losses [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			168,636	136,596	136,596
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			29,105		38,298
Financing Receivable, Allowance for Credit Loss, Ending Balance	202,295		202,295		168,636
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			19,514
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			5,086
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			294
Allowance for Loan Losses [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			11,327	9,417	9,417
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(1,887)		2,023
Financing Receivable, Allowance for Credit Loss, Ending Balance	13,154		13,154		11,327
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			2,516
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,198
Allowance for Loan Losses [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			179,963	146,013	146,013
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			27,218		40,321
Financing Receivable, Allowance for Credit Loss, Ending Balance	215,449		215,449		179,963
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			22,030
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			6,284
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			294
Allowance for Loan Losses [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			58,243	71,547	71,547
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(10,475)		4,917
Financing Receivable, Allowance for Credit Loss, Ending Balance	64,788		64,788		58,243
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			11,640
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,590
Allowance for Loan Losses [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			46,595	51,499	51,499
Financing Receivable, Allowance for Credit Loss, Writeoff			0		0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			6,065		(5,058)
Financing Receivable, Allowance for Credit Loss, Ending Balance	59,421		59,421		46,595
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			3,459
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			3,298
Allowance for Loan Losses [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			104,838	123,046	123,046
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(4,410)		(141)
Financing Receivable, Allowance for Credit Loss, Ending Balance	124,209		124,209		104,838
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			15,099
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			10,888
Allowance for Loan Losses [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			284,801	269,060	269,060
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			22,808		40,180
Financing Receivable, Allowance for Credit Loss, Ending Balance	339,658		339,658		284,801
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			37,129
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			17,172
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			294
Allowance for Loan Losses [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			33,644	32,576	32,576
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			39		1,601
Financing Receivable, Allowance for Credit Loss, Ending Balance	35,452		35,452		33,644
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			790
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,028
Allowance for Loan Losses [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			27,470	28,467	28,467
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			2,059		4,726
Financing Receivable, Allowance for Credit Loss, Ending Balance	34,765		34,765		27,470
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			1,346
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,241
Allowance for Loan Losses [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			16,343	16,620	16,620
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(765)		(860)
Financing Receivable, Allowance for Credit Loss, Ending Balance	18,500		18,500		16,343
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			174
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			2,058
Allowance for Loan Losses [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			15,810	16,823	16,823
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			1,859		5,853
Financing Receivable, Allowance for Credit Loss, Ending Balance	15,354		15,354		15,810
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			73
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			764
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			103
Allowance for Loan Losses [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			93,267	94,486	94,486
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			3,192		11,320
Financing Receivable, Allowance for Credit Loss, Ending Balance	104,071		104,071		93,267
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			2,383
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			11,091
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			103
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			1,871
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			3,597
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			41,276	38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			4,000		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	50,744		50,744		41,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			689
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			1,300
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			18,698	14,456	14,456
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(1,650)		4,242
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	19,037		19,037		18,698
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			21
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			18
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			132	151	151
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			78		(19)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	249		249		132
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			710
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			1,318
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			18,830	14,607	14,607
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(1,572)		4,223
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	19,286		19,286		18,830
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			28
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			102
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			499	578	578
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			281		(79)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	910		910		499
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			901
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			2,169
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			17,947	19,591	19,591
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			5,243		(1,644)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	26,260		26,260		17,947
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			929
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			2,271
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			18,446	20,169	20,169
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			5,524		(1,723)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	27,170		27,170		18,446
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			1,639
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			3,589
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			37,276	34,776	34,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			3,952		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	46,456		46,456		37,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			207
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			8
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			2,406	2,465	2,465
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			49		(59)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	2,670		2,670		2,406
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			25
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			0
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			1,594	1,535	1,535
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(1)		59
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	1,618		1,618		1,594
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			232
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			8
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			4,000	4,000	4,000
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			48		0
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	4,288		4,288		4,000
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			397
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			419,344	402,322	402,322
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Provision for Loan, Lease, and Other Losses			30,000		54,000
Balance at end of period	$ 494,473		$ 494,473		$ 419,344
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.36%		1.36%		1.35%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 43,109
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			30,134
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		$ (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			294
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			187,334	151,052	151,052
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Provision for Loan, Lease, and Other Losses			27,455		42,540
Balance at end of period	$ 221,332		$ 221,332		$ 187,334
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.61%		1.61%		1.59%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 20,814
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			5,775
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		$ (113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			11,459	9,568	9,568
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Provision for Loan, Lease, and Other Losses			(1,809)		2,004
Balance at end of period	$ 13,403		$ 13,403		$ 11,459
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.85%		0.85%		0.97%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 2,534
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,219
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		$ (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			294
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			198,793	160,620	160,620
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Provision for Loan, Lease, and Other Losses			25,646		44,544
Balance at end of period	$ 234,735		$ 234,735		$ 198,793
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.53%		1.53%		1.53%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 23,348
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			6,994
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		$ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			58,742	72,125	72,125
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Provision for Loan, Lease, and Other Losses			(10,194)		4,838
Balance at end of period	$ 65,698		$ 65,698		$ 58,742
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.01%		1.01%		1.12%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 11,742
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,618
Allowance for Loans Losses and Unfunded Commitments [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		$ 0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			64,542	71,090	71,090
Financing Receivable, Allowance for Credit Loss, Writeoff			0		0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Provision for Loan, Lease, and Other Losses			11,308		(6,702)
Balance at end of period	$ 85,681		$ 85,681		$ 64,542
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	3.37%		3.37%		3.24%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 5,628
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			4,199
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		$ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			123,284	143,215	143,215
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Provision for Loan, Lease, and Other Losses			1,114		(1,864)
Balance at end of period	$ 151,379		$ 151,379		$ 123,284
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.67%		1.67%		1.70%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 17,370
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			11,817
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		$ (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			294
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			322,077	303,835	303,835
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Provision for Loan, Lease, and Other Losses			26,760		42,680
Balance at end of period	$ 386,114		$ 386,114		$ 322,077
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.58%		1.58%		1.59%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 40,718
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			18,811
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		$ (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			33,644	32,576	32,576
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Provision for Loan, Lease, and Other Losses			39		1,601
Balance at end of period	$ 35,452		$ 35,452		$ 33,644
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.52%		0.52%		0.50%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 790
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,028
Allowance for Loans Losses and Unfunded Commitments [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		$ (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			27,470	28,467	28,467
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Provision for Loan, Lease, and Other Losses			2,059		4,726
Balance at end of period	$ 34,765		$ 34,765		$ 27,470
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.86%		0.86%		0.88%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 1,346
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,241
Allowance for Loans Losses and Unfunded Commitments [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		$ (416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			18,749	19,085	19,085
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Provision for Loan, Lease, and Other Losses			(716)		(919)
Balance at end of period	$ 21,170		$ 21,170		$ 18,749
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	2.56%		2.56%		2.63%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 182
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			2,265
Allowance for Loans Losses and Unfunded Commitments [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		$ (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			103
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			17,404	18,358	18,358
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Provision for Loan, Lease, and Other Losses			1,858		5,912
Balance at end of period	$ 16,972		$ 16,972		$ 17,404
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	4.01%		4.01%		5.39%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 73
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			789
Allowance for Loans Losses and Unfunded Commitments [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		$ (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			103
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			97,267	$ 98,486	98,486
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Provision for Loan, Lease, and Other Losses			3,240		11,320
Balance at end of period	$ 108,359		$ 108,359		$ 97,267
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.90%		0.90%		0.89%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 2,391
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			$ 11,323

XML

Loans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Loans Information [Line Items]
Interest Receivable	$ 181,916		$ 181,916		$ 161,118
Financing Receivable, Accrued Interest, Writeoff	400	$ 500	800	$ 1,100
Mortgage Loans in Process of Foreclosure, Amount	19,400		19,400		20,100
Loans and Finance Receivables [Member]
Loans Information [Line Items]
Interest Receivable	$ 135,400		$ 135,400		$ 117,600

XML

Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Summary of core deposit intangibles and other intangibles
Amortization of Intangible Assets	$ 6,894	$ 2,203	$ 9,096	$ 4,405
Core Deposits [Member]
Summary of core deposit intangibles and other intangibles
Finite-Lived Core Deposits, Gross	88,109		88,109		$ 88,109
Additions during the period			103,200
Finite-Lived Intangible Assets, Accumulated Amortization	(74,356)		(74,356)		(65,260)
Finite-Lived Intangible Assets, Net, Total	$ 116,953		116,953		22,849
Amortization of Intangible Assets			$ 9,096		$ 8,811

XML

Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Summary of Changes in MSR [Line Items]
Servicing Asset at Fair Value, Amount, Beginning Balance	$ 86,337	$ 87,683
Servicing Asset at Fair Value, Additions	6,159	8,716
Servicing Asset at Fair Value, Disposals	(4,899)	(8,621)
Servicing Asset at Fair Value, Other Changes in Fair Value	86	(1,441)
Servicing Asset at Fair Value, Amount, Ending Balance	87,683	86,337
Portfolio Of Residential Mortgage Loans Serviced For Others	$ 6,160,254	$ 6,191,012
Mortgage Servicing Rights Net To Servicing Portfolio	1.42%	1.39%

XML

Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Core Deposits [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	$ 13,788
Finite-Lived Intangible Asset, Expected Amortization, Year One	26,167
Finite-Lived Intangible Asset, Expected Amortization, Year Two	18,965
Finite-Lived Intangible Asset, Expected Amortization, Year Three	15,285
Finite-Lived Intangible Asset, Expected Amortization, Year Four	11,788
Finite-Lived Intangible Asset, Expected Amortization, Year Five	9,851
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	21,109
Finite-Lived Intangible Assets, Net, Total	116,953	$ 22,849
Servicing Contracts [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	4,817
Finite-Lived Intangible Asset, Expected Amortization, Year One	11,601
Finite-Lived Intangible Asset, Expected Amortization, Year Two	11,838
Finite-Lived Intangible Asset, Expected Amortization, Year Three	11,189
Finite-Lived Intangible Asset, Expected Amortization, Year Four	10,214
Finite-Lived Intangible Asset, Expected Amortization, Year Five	9,123
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	28,901
Finite-Lived Intangible Assets, Net, Total	$ 87,683

XML

Goodwill and Other Intangible Assets (Details Textuals) - USD ($) $ in Thousands	2 Months Ended	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2026	Jun. 30, 2025	Apr. 01, 2026	Dec. 31, 2025
Goodwill [Line Items]
Goodwill, Impaired, Facts and Circumstances Leading to Impairment	no
Goodwill, Impairment Loss		$ 0	$ 0
Goodwill	$ 1,147,081	$ 1,147,081		$ 42,100	$ 1,104,992
American National [Member]
Goodwill [Line Items]
Goodwill				$ 42,089

XML

Short and Long-Term Funding, Composition (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Short-Term Debt [Abstract]
Federal Funds Purchased	$ 473,905	$ 260,070
Securities Sold under Agreements to Repurchase	55,371	47,794
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Total	529,276	307,864
Debt Instrument [Line Items]
Senior Notes	300,000	300,000
Subordinated Debt	300,000	300,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(6,895)	(7,484)
Long-term Debt	591,080	594,276
TotalShortTermLongTermExcludingFHLB	1,120,356	902,140
Federal Funds Purchased	473,905	260,070
Securities Sold under Agreements to Repurchase	55,371	47,794
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	529,276	307,864
Advance from Federal Home Loan Bank	4,315,000	2,855,250
Long-Term Federal Home Loan Bank Advances	263,115	414,122
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	4,574,681	3,268,094
Debt, Long-Term and Short-Term, Combined Amount	5,695,037	4,170,234
Short-Term Debt	529,276	307,864
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	4,315,000	2,855,250
Long-Term Federal Home Loan Bank Advances	263,115	414,122
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	4,574,681	3,268,094
Debt, Long-Term and Short-Term, Combined Amount	5,695,037	4,170,234
Fair Value Hedging [Member]
Debt Instrument [Line Items]
Subordinated Debt	(2,025)	1,760
Advance from Federal Home Loan Bank	(3,434)	(1,278)
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	$ (3,434)	$ (1,278)

XML

Short and Long-Term Funding (Remaining Contractual Maturity of the Securities Sold Under Agreements to Repurchase) (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Maturity Overnight and on Demand [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	$ 55,371	$ 47,794

XML

Short and Long-Term Funding (Long-term Funding Narrative) (Details Textuals) - USD ($) $ in Thousands								12 Months Ended	60 Months Ended		61 Months Ended
	Mar. 01, 2033	Aug. 29, 2030	Jul. 30, 2030	Aug. 29, 2029	Mar. 01, 2028	Aug. 29, 2024	Feb. 10, 2023	Aug. 28, 2030	Mar. 01, 2033	Aug. 28, 2029	Feb. 29, 2028	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Fair Value of Pledged Securites to Securities Sold under Agreements to Repurchase												202.00%
Senior Notes												$ 300,000	$ 300,000
Debt Instrument, Rate Conversion Date				Aug. 29, 2029
Debt Instrument, Rate Start Date						Aug. 29, 2024
Two Thousand Twenty Four Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Issuance Date Month, Year						August 2024
Senior Notes						$ 300,000
Debt Instrument, Maturity Date Month, Year		Aug. 29, 2030
Debt Instrument, Redemption			Jul. 30, 2030
Interest Added to Compound SOFR, effective floating rate								3.03%
Debt Instrument, Redemption Period, Start Date				Aug. 29, 2029
Debt Instrument, Interest Rate During Period										6.455%
Two Thousand Twenty Three Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date Month, Year							February 2023
Debt Instrument, Maturity Date Month, Year	Mar. 01, 2033
Debt Instrument, Redemption Period, Start Date					Mar. 01, 2028
Junior Subordinated Debentures Issued							$ 300,000
Debt Instrument, Term							10 years
Subordinated Borrowing, Interest Rate											6.625%
Interest Added to UST 5 Year Rate									2.812%

XML

Derivative and Hedging Activities, Derivative Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	$ 100,000
Derivative Liability, Notional Amount	250,000
Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	48,451	$ 42,468
Derivative Liability, Subject to Master Netting Arrangement, before Offset	15,109	23,006
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	9,343	12,839
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	9,343	12,839
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset	17,769	10,343
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	720	8,334
Derivative Asset	21,339	19,286
Derivative Liability	5,046	1,833
Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	66,355	80,606
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	9,343	12,839
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset	17,769	10,343
Derivative Asset	39,243	57,424
Other Liabilities [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	119,081	110,787
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	9,343	12,839
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	720	8,334
Derivative Liability	109,018	89,614
Designated as Hedging Instrument | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	2,790	11,274
Designated as Hedging Instrument | Other Assets [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	1,150,000	2,425,000
Designated as Hedging Instrument | Other Assets [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	48,307	280,159
Designated as Hedging Instrument | Other Liabilities [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	7,040	195
Designated as Hedging Instrument | Other Liabilities [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	1,650,000	25,000
Designated as Hedging Instrument | Other Liabilities [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	269,686	38,384
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	63,565	69,332
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	5,496,857	4,775,818
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	65,014	48,904
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	68,998	39,998
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	112,041	110,592
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	6,553,249	7,072,274
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	13,535	43,787
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	141,000	107,000
Fair Value, Inputs, Level 2
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	200
Derivative Liability, Notional Amount	(1,500)
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	1,432	814
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	1,435	10,517
Derivative Liability	6,737	1
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	61,693	66,787
Derivative Liability	111,446	108,631
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	440	1,731
Derivative Liability	198	1,517
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	1,435	10,517
Derivative Liability	6,737	1
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	1,355	757
Derivative Liability	303	194
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	61,693	66,787
Derivative Liability	111,446	108,631
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Derivative Financial Instruments, Assets [Member]
Derivative Instrument Detail [Abstract]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	1,432	814	$ 327
Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis With Unobservable Inputs - Forward Commitments	(400)	(400)
Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis With Unobservable Inputs - Interest Rate Lock Commitements	1,400	800
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	1,432	814
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Designated as Hedging Instrument | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Derivative Liability	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Derivative Liability	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	1,432	814
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability	$ 397	$ 444

XML

Derivative and Hedging Activities Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	$ (250,000)
Carrying amount excluded for foreign currency loans	318,000	$ 318,500
Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	(494,541)	(500,482)
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	5,459	(482)
Long-Term Debt [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	(297,975)	(301,760)
Long-Term Debt [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	2,025	(1,760)
Federal Home Loan Bank Advances [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	(196,566)	(198,722)
Federal Home Loan Bank Advances [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ 3,434	$ 1,278

XML

Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2020	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability Notional Amount, Terminated			$ 500,000
Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ 565	$ (1,464)		$ 1,169	$ (2,614)
Interest Income [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	(31)	(27)		(174)	(58)
Interest Income [Member] | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	597	(1,437)		1,343	(2,555)
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	(380)	(1,942)		(777)	(4,160)
Interest Expense | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	2,952	(4,099)		5,942	(11,096)
Interest Expense | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	(3,332)	2,158		(6,719)	6,936
Capital Market Fees [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	51	0		53	1
Capital Market Fees [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Foreign Currency Fair Value Hedge	(13,163)	19,542		(18,086)	20,095
Capital Market Fees [Member] | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Foreign Currency Fair Value Hedging Instruments	$ 13,214	$ (19,542)		$ 18,139	$ (20,093)

XML

Derivative and Hedging Activities, Cash Flow Hedge Included in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Cash Flow Hedge Impacts on AOCI [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ (6,506)	$ 1,264	$ (14,418)	$ 8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ (597)	$ 1,437	$ (1,343)	$ 2,555

XML

Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Capital Market Fees [Member] | Interest Rate Related Instruments Customer and Mirror [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (1)	$ (42)	$ (31)	$ (90)
Capital Market Fees [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	202	(1,075)	642	(575)
Mortgage Banking [Member] | Interest Rate-Related Instruments - MSRs Hedge
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(420)	(308)	(219)	1,158
Mortgage Banking [Member] | Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	595	933	617	1,594
Mortgage Banking [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (1,339)	$ (779)	$ 46	$ (1,616)

XML

Derivative and Hedging Activities (Details Textuals) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2020	Jun. 30, 2026	Sep. 30, 2026	Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Additional Collateral, Aggregate Fair Value		$ 73.8		$ 79.4
Derivative collateral right to reclaim cash		3.5		$ 11.8
Derivative Liability Notional Amount, Terminated	$ 500.0
Underlying Hedged Asset, Amortized Cost Basis		$ 151.4
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months			$ 3.1
Maximum Length of Time Hedged in Cash Flow Hedge		41 months
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge		$ 0.7

XML

Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Offsetting Derivative Assets [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	$ 48,451	$ 42,468
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(9,343)	(12,839)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(17,769)	(10,343)
Derivative Asset	21,339	19,286
Derivative Collateral Obligation to Return Collateral	(17,912)	(18,131)
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction	3,427	1,155
Offsetting Derivative Liabilities [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	15,109	23,006
Derivative Liability, Fair Value, Gross Asset	(9,343)	(12,839)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(720)	(8,334)
Derivative Liability	5,046	1,833
Derivative Collateral Right to Reclaim Collateral	0	0
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction	$ 5,046	$ 1,833

XML

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters, Summary of Lending Related and Other Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Other Commitments [Line Items]
Lending Related Commitments, Fair Value	$ 0		$ 0		$ 0
Loans Repurchased Under Make Whole Requests			2,900		3,500
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	50,744		50,744		41,276
Investment Program, Proportional Amortization Method, Elected [Line Items]
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit	10,406	$ 10,772	19,543	$ 20,230
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Lending Related Commitments	13,006,388		13,006,388		11,872,816
Letter of Credit [Member]
Other Commitments [Line Items]
Lending Related Commitments	589		589		425
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Lending Related Commitments	252,770		252,770		222,047
Lines of Credit, Fair Value Disclosure	2,400		2,400		$ 2,200
Affordable Housing Projects and Other [Member]
Other Commitments [Line Items]
Investment Program, Proportional Amortization Method, Applied, Amortization Expense	8,692	8,369	17,146	17,058
Investment Program, Proportional Amortization Method, Elected [Line Items]
Investment Program, Proportional Amortization Method, Applied, Amortization Expense	$ 8,692	$ 8,369	$ 17,146	$ 17,058

XML

Commitment, Changes in the Allowance for Unfunded Commitments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	$ 41,276	$ 38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	4,000	2,500
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration	3,597
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period	1,871
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 50,744	$ 41,276

XML

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Jan. 01, 2022
Other Commitments [Line Items]
Investment Program, Proportional Amortization Method, Elected, Impairment Loss	$ 900,000	$ 900,000		$ 900,000
Loans Repurchased Under Make Whole Requests			$ 2,900,000		$ 3,500,000
Loans Sold To Outside Investors Loss Reimbursement Settlement Paid					0
Make Whole Requests, Loan Origination Date, Majority			Jan. 01, 2022
Loans Sold To Outside Investors Original Amount						$ 4,300,000,000
Loans Sold To Outside Investors Remaining Outstanding Amount	2,000,000,000.0		$ 2,000,000,000.0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	50,744,000		50,744,000		41,276,000
Financing Receivable, before Allowance for Credit Loss	36,467,040,000		36,467,040,000		31,163,614,000
Loss on Sale of Investments					0
Residential Mortgage [Member]
Other Commitments [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	400,000		400,000		300,000
Residential Mortgage [Member] | Recourse
Other Commitments [Line Items]
Financing Receivable, before Allowance for Credit Loss	12,200,000		12,200,000		11,400,000
Residential Mortgage [Member] | Recourse | Credit Risk
Other Commitments [Line Items]
Financing Receivable, before Allowance for Credit Loss	365,800,000		365,800,000		273,400,000
Loss on Sale of Investments			0
Affordable Housing Projects and Other [Member]
Other Commitments [Line Items]
Other Investments	161,300,000		161,300,000		174,300,000
Investment Program, Proportional Amortization Method, Applied, Amortization Expense	8,692,000	$ 8,369,000	17,146,000	$ 17,058,000
Investment, Proportional Amortization Method, Elected, Amount	160,000,000.0		160,000,000.0		172,200,000
Investment Program, Proportional Amortization Method, Elected, Impairment Loss			900,000
Investment Program, Proportional Amortization Method, Elected, Commitment	22,500,000		22,500,000		22,800,000
Loan Pool CRA Investments [Member]
Other Commitments [Line Items]
Other Investments	$ 74,300,000		$ 74,300,000		$ 62,300,000

XML

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	$ 548,057	$ 574,698
Interest-bearing Deposits in Banks and Other Financial Institutions	1,268,379	1,144,123
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	14,355	1,400
Debt Securities, Available-for-Sale	6,366,586	5,397,563
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,510,775	3,602,576
Debt Securities, Held-to-Maturity, Fair Value	3,091,818	3,190,994
Equity Securities, FV-NI and without Readily Determinable Fair Value	29,960	26,060
FHLB and Federal Reserve Bank stocks	329,436	252,514
Loans and Leases Receivable, Net Amount	36,023,311	30,785,546
Life Insurance, Corporate or Bank Owned, Amount	717,116	694,452
Assets	51,812,506	45,202,596
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	6,908,338	6,126,632
Deposits	39,931,255	35,552,608
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	529,276	307,864
Short-Term Debt	529,276	307,864
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	4,574,681	3,268,094
Other Long-Term Debt	591,080	594,276
Liabilities	46,174,383	40,227,249
Standby Letters of Credit [Member]
Liabilities, Fair Value Disclosure
Lending Related Commitments	252,800	222,000
Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	21,339	19,286
Liabilities, Fair Value Disclosure
Derivative Liability	5,046	1,833
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	548,057	574,698
Interest-bearing Deposits in Banks and Other Financial Institutions	1,268,379	1,144,123
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	14,355	1,400
Equity Securities, FV-NI	14,960	11,060
Equity Securities, FV-NI and without Readily Determinable Fair Value	29,960	26,060
FHLB and Federal Reserve Bank stocks	329,436	252,514
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	94,490	72,499
Loan, Held-for-Sale, Fair Value Disclosure	15,000
Loans and Leases Receivable, Net Amount	35,976,291	30,766,886
Loans Receivable, Fair Value Disclosure	35,021,793	29,970,788
Life Insurance, Corporate or Bank Owned, Amount	717,116	694,452
Servicing Asset	87,683	86,337
Assets	49,024,483	42,699,714
Assets, Fair Value Disclosure	47,651,028	41,492,034
Liabilities, Fair Value Disclosure
Brokered CDs, Carrying Amount	3,933,787	3,795,133
Brokered CDs, Fair Value	3,923,505	3,791,245
Time Deposits, at Carrying Value	4,782,343	4,041,178
Time Deposits	4,771,175	4,035,549
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	529,276	307,864
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	529,276	307,864
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	4,574,681	3,268,094
Federal Home Loan Bank Borrowings, Fair Value Disclosure	4,568,111	3,267,836
Other Long-Term Debt	591,080	594,276
Long-term Debt, Fair Value	589,506	598,141
Long-Term Line of Credit	2,365	2,225
Liabilities	14,532,613	12,119,557
Liabilities, Fair Value Disclosure	14,503,019	12,113,647
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,432	814
Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	397	444
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,435	10,517
Liabilities, Fair Value Disclosure
Derivative Liability	6,737	1
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	1,355	757
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	303	194
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	61,693	66,787
Liabilities, Fair Value Disclosure
Derivative Liability	111,446	108,631
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	440	1,731
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	198	1,517
US Treasury Securities
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	997	996
Debt Securities, Held-to-Maturity, Fair Value	1,002	1,015
US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	997	996
Debt Securities, Held-to-Maturity, Fair Value	1,002	1,015
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	7,240	3,044
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,591,681	1,628,088
Debt Securities, Held-to-Maturity, Fair Value	1,468,604	1,507,302
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	7,240	3,044
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,591,681	1,628,088
Debt Securities, Held-to-Maturity, Fair Value	1,468,604	1,507,302
Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	137,288	129,863
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	790,729	823,630
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
Residential Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	5,491,648	5,039,829
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	37,215	39,123
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	137,288	129,863
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	790,729	823,630
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	5,491,648	5,039,829
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	37,215	39,123
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	292,007	302,817
Debt Securities, Held-to-Maturity, Fair Value	246,460	258,827
Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	410,221	16,958
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	757,723	763,370
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
Commercial Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	106,844	109,556
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	40,423	44,552
Debt Securities, Held-to-Maturity, Fair Value	36,089	40,138
Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	410,221	16,958
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	757,723	763,370
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	106,844	109,556
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	40,423	44,552
Debt Securities, Held-to-Maturity, Fair Value	36,089	40,138
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	88,212	95,046
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	88,212	95,046
US Government-sponsored Enterprises Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	120,070	269
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	120,070	269
Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	5,063	2,998
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	6,366,586	5,397,563
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,510,775	3,602,576
Debt Securities, Held-to-Maturity, Fair Value	3,091,818	3,190,994
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	548,057	574,698
Interest-bearing Deposits in Banks and Other Financial Institutions	1,268,379	1,144,123
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	14,355	1,400
Equity Securities, FV-NI	14,960	11,060
FHLB and Federal Reserve Bank stocks	0	0
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure	0
Loans Receivable, Fair Value Disclosure	0	0
Life Insurance, Corporate or Bank Owned, Amount	0	0
Servicing Asset	0	0
Assets, Fair Value Disclosure	1,846,753	1,732,296
Liabilities, Fair Value Disclosure
Brokered CDs, Fair Value	0	0
Time Deposits	0	0
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	529,276	307,864
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Long-Term Line of Credit	0	0
Liabilities, Fair Value Disclosure	529,276	307,864
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	1,002	1,015
Fair Value, Inputs, Level 1 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	1,002	1,015
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	0	0
Interest-bearing Deposits in Banks and Other Financial Institutions	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Equity Securities, FV-NI	0	0
FHLB and Federal Reserve Bank stocks	329,436	252,514
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	94,490	72,499
Loan, Held-for-Sale, Fair Value Disclosure	15,000
Loans Receivable, Fair Value Disclosure	0	0
Life Insurance, Corporate or Bank Owned, Amount	717,116	694,452
Servicing Asset	0	0
Assets, Fair Value Disclosure	10,676,304	9,686,799
Liabilities, Fair Value Disclosure
Brokered CDs, Fair Value	3,923,505	3,791,245
Time Deposits	4,771,175	4,035,549
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	4,568,111	3,267,836
Long-term Debt, Fair Value	589,506	598,141
Long-Term Line of Credit	2,365	2,225
Liabilities, Fair Value Disclosure	13,973,346	11,805,339
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	440	1,731
Liabilities, Fair Value Disclosure
Derivative Liability	198	1,517
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,435	10,517
Liabilities, Fair Value Disclosure
Derivative Liability	6,737	1
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,355	757
Foreign Currency Contract, Asset, Fair Value Disclosure	1,355	757
Liabilities, Fair Value Disclosure
Derivative Liability	303	194
Foreign Currency Contracts, Liability, Fair Value Disclosure	303	194
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	61,693	66,787
Liabilities, Fair Value Disclosure
Derivative Liability	111,446	108,631
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	440	1,731
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	198	1,517
Fair Value, Inputs, Level 2 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	7,240	3,044
Debt Securities, Held-to-Maturity, Fair Value	1,468,604	1,507,302
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	137,288	129,863
Debt Securities, Held-to-Maturity, Fair Value	660,737	696,462
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	5,491,648	5,039,829
Debt Securities, Held-to-Maturity, Fair Value	34,626	36,884
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	246,460	258,827
Fair Value, Inputs, Level 2 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	410,221	16,958
Debt Securities, Held-to-Maturity, Fair Value	644,300	650,366
Fair Value, Inputs, Level 2 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	106,844	109,556
Debt Securities, Held-to-Maturity, Fair Value	36,089	40,138
Fair Value, Inputs, Level 2 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	88,212	95,046
Fair Value, Inputs, Level 2 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	120,070	269
Fair Value, Inputs, Level 2 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	3,000	2,998
Fair Value, Inputs, Level 2 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	6,364,523	5,397,563
Fair Value, Inputs, Level 2 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	3,090,816	3,189,979
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,100
Equity Securities, FV-NI		0	$ 72
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	0	0
Interest-bearing Deposits in Banks and Other Financial Institutions	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Equity Securities, FV-NI	0	0
FHLB and Federal Reserve Bank stocks	0	0
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure	0
Loans Receivable, Fair Value Disclosure	35,021,793	29,970,788
Life Insurance, Corporate or Bank Owned, Amount	0	0
Servicing Asset	87,683	86,337
Assets, Fair Value Disclosure	35,112,971	30,057,939
Liabilities, Fair Value Disclosure
Brokered CDs, Fair Value	0	0
Time Deposits	0	0
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Long-Term Line of Credit	0	0
Liabilities, Fair Value Disclosure	397	444
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,432	814
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	397	444
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,432	814
Fair Value, Inputs, Level 3 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 3 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 3 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,063	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,063	0
Fair Value, Inputs, Level 3 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, NAV [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	$ 15,000	$ 15,000

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Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Equity Securities without Readily Determinable Fair Value [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net		$ (63)
Fair Value, Measurements, Recurring | Derivative Financial Instruments, Assets [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 814	327
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	7,629	13,435
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(6,308)	(13,690)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(703)	742
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	618	487
Ending Balance	1,432	814
Fair Value, Measurements, Recurring | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	444	(254)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	(2,240)	(3,998)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	2,910	2,738
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(717)	1,958
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	(47)	698
Ending Balance	$ 397	$ 444

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Fair Value Measurements Equity Securities Roll Forward (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Equity Securities without Readily Determinable Fair Value [Line Items]
Equity Securities, FV-NI	$ 0	$ 72
Payments to Acquire Equity Securities, FV-NI	14
Proceeds from Sale of Equity Securities, FV-NI	$ 23

XML

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate	$ 1,397	$ 770
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, Individually Evaluated for Impairment	$ 48,296	$ 18,659

XML

Fair Value Measurements Fair Value Unobservable Level 3 Measurements (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024
Derivative Financial Instruments, Assets [Member] | Fair Value, Measurements, Recurring
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis With Unobservable Inputs - Interest Rate Lock Commitements	$ 1,400	$ 800
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	1,432	814	$ 327
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	7,629	13,435
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(6,308)	(13,690)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(703)	742
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	618	487
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	397	444	$ (254)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	(2,240)	(3,998)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	2,910	2,738
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(717)	1,958
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	$ (47)	$ 698
Discounted Cash Flow | Servicing Contracts [Member] | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	5.00%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	0.00%
Discounted Cash Flow | Servicing Contracts [Member] | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	8.00%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	100.00%
Discounted Cash Flow | Servicing Contracts [Member] | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	5.00%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	8.00%
Discounted Cash Flow | Impaired Finance Receivable [Member] | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor	45.00%
Discounted Cash Flow | Impaired Finance Receivable [Member] | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor	45.00%
Discounted Cash Flow | Impaired Finance Receivable [Member] | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor	45.00%
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Interest Rate Lock Commitments, Closing Ratio	70.00%
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Interest Rate Lock Commitments, Closing Ratio	100.00%
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Interest Rate Lock Commitments, Closing Ratio	92.00%
Valuation, Market Approach | Impaired Finance Receivable [Member] | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor	44.00%
Valuation, Market Approach | Impaired Finance Receivable [Member] | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor	80.00%
Valuation, Market Approach | Impaired Finance Receivable [Member] | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor	53.00%

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Retirement Plans, Components of Net Periodic Benefit Cost for the Pension and Postretirement Tables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Pension Plan [Member]
Net period benefit cost for the pension and postretirement plans
Defined Benefit Plan, Service Cost	$ 869	$ 810	$ 1,737	$ 1,619
Defined Benefit Plan, Interest Cost	2,749	2,814	5,499	5,628
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(9,772)	(9,809)	(19,544)	(19,619)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(44)	(44)	(89)	(89)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(6,198)	(6,230)	(12,397)	(12,460)
Other Postretirement Benefits Plan [Member]
Net period benefit cost for the pension and postretirement plans
Defined Benefit Plan, Interest Cost	22	26	43	53
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(19)	(19)	(38)	(38)
Defined Benefit Plan, Amortization of Gain (Loss)	0	4	0	8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ 3	$ 12	$ 6	$ 23

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Retirement Plans (Details Textuals) (Details) - Pension Plan [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Description	The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefit allocations are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. As part of acquisition-related integration activities, employees who become eligible for participation in the RAP are generally provided service credit for their employment with the acquired institution for eligibility and vesting purposes.
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0

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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Apr. 01, 2026	Dec. 31, 2025
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	$ 370,039		$ 300,000		$ 677,228	$ 585,940
Noninterest Income	80,398		66,977		156,256	125,754
Provision for Loan, Lease, and Other Losses	19,388		17,996		30,389	30,999
Noninterest Expense	271,882		209,352		491,045	419,971
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	159,167		139,629		312,050	260,724
Income Tax Expense (Benefit)	35,603		28,399		68,850	47,808
Net Income (Loss) Attributable to Parent, Total	123,564	$ 119,635	111,230	$ 101,687	243,200	212,916
Goodwill	1,147,081				1,147,081		$ 42,100	$ 1,104,992
Interest Income (Expense), after Provision for Loan Loss	350,651		282,004		646,839	554,941
Labor and Related Expense	161,168		126,994		296,341	250,890
Information Technology and Data Processing	32,867		26,508		62,603	53,646
Occupancy, Net	14,091		12,644		27,817	28,025
Marketing and Advertising Expense	8,548		7,748		16,374	14,134
Equipment Expense	5,423		4,494		11,033	9,021
Professional Fees	17,454		6,674		24,176	12,757
Federal Deposit Insurance Corporation Premium Expense	10,595		9,708		19,432	20,144
Amortization of Intangible Assets	6,894		2,203		9,096	4,405
Other Noninterest Expense	13,290		9,674		20,914	21,648
Commercial and business lending	36,467,040				36,467,040			31,163,614
Assets	51,812,506				51,812,506			$ 45,202,596
Gain (Loss) on Sale of Mortgage Loans	0		0		0	(6,976)
Corporate and Commercial Specialty [Member]
Segment Income Statement Data Abstract
A portion of total depreciation Technology expense	200		100		300	100
Community, Consumer and Business [Member]
Segment Income Statement Data Abstract
A portion of total depreciation Occupancy expense	6,300		5,900		12,500	11,800
Risk Management and Shared Services [Member]
Segment Income Statement Data Abstract
A portion of total depreciation Equipment expense	6,000		6,000		11,900	14,000
Operating Segments
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	370,039		300,000		677,228	585,940
Net intersegment interest income (expense)	0		0		0	0
Segment net interest income	370,039		300,000		677,228	585,940
Noninterest Income	80,398		66,977		156,256	125,754
Provision for Loan, Lease, and Other Losses	19,388		17,996		30,389	30,999
Noninterest Expense	271,882		209,352		491,045	419,971
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	159,167		139,629		312,050	260,724
Income Tax Expense (Benefit)	35,603		28,399		68,850	47,808
Net Income (Loss) Attributable to Parent, Total	123,564		111,230		243,200	212,916
Goodwill	1,147,081		1,104,992		1,147,081	1,104,992
Interest Income (Expense), before Provision	450,437		366,977		833,484	711,694
Interest Income (Expense), after Provision for Loan Loss	431,049		348,981		803,095	680,695
Labor and Related Expense	161,168		126,994		296,341	250,890
Information Technology and Data Processing	32,867		26,508		62,603	53,646
Occupancy, Net	14,091		12,644		27,817	28,025
Marketing and Advertising Expense	8,548		7,748		16,374	14,134
Equipment Expense	5,423		4,494		11,033	9,021
Professional Fees	17,454		6,674		24,176	12,757
Payments of Financing Costs	1,552		2,705		3,259	5,299
Federal Deposit Insurance Corporation Premium Expense	10,595		9,708		19,432	20,144
Amortization of Intangible Assets	6,894		2,203		9,096	4,405
Other Noninterest Expense	13,290		9,674		20,914	21,648
Allocated indirect expense	0		0		0	0
Commercial and business lending	36,467,040		30,607,605		36,467,040	30,607,605
Assets	51,812,506		43,993,729		51,812,506	43,993,729
Operating Segments | Corporate and Commercial Specialty [Member]
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	267,324		242,978		498,429	470,263
Net intersegment interest income (expense)	(105,641)		(107,337)		(208,353)	(203,557)
Segment net interest income	161,683		135,641		290,076	266,706
Noninterest Income	15,648		11,984		29,540	24,887
Provision for Loan, Lease, and Other Losses	21,287		20,369		41,947	39,382
Noninterest Expense	58,400		56,021		108,131	112,155
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	97,644		71,236		169,538	140,056
Income Tax Expense (Benefit)	17,567		13,211		30,825	25,997
Net Income (Loss) Attributable to Parent, Total	80,077		58,025		138,713	114,059
Goodwill	556,343		525,836		556,343	525,836
Interest Income (Expense), before Provision	177,331		147,625		319,616	291,593
Interest Income (Expense), after Provision for Loan Loss	156,044		127,256		277,669	252,211
Labor and Related Expense	24,595		20,149		48,145	41,475
Information Technology and Data Processing	1,293		842		2,116	1,432
Occupancy, Net	255		190		473	336
Marketing and Advertising Expense	1,128		1,252		2,097	2,186
Equipment Expense	6		6		12	12
Professional Fees	272		221		529	422
Payments of Financing Costs	233		261		721	1,071
Federal Deposit Insurance Corporation Premium Expense	0		0		0	0
Amortization of Intangible Assets	0		0		0	0
Other Noninterest Expense	1,087		934		1,808	1,714
Allocated indirect expense	29,531		32,166		52,230	63,505
Commercial and business lending	21,736,674		17,617,892		21,736,674	17,617,892
Assets	22,552,085		17,907,721		22,552,085	17,907,721
Operating Segments | Community, Consumer and Business [Member]
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	86,481		68,871		154,917	131,367
Net intersegment interest income (expense)	136,046		143,478		266,076	288,856
Segment net interest income	222,527		212,349		420,993	420,223
Noninterest Income	56,437		51,481		112,380	100,560
Provision for Loan, Lease, and Other Losses	6,456		6,363		13,391	12,434
Noninterest Expense	174,545		153,331		330,630	307,816
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	97,963		104,137		189,352	200,533
Income Tax Expense (Benefit)	20,676		21,869		39,868	42,112
Net Income (Loss) Attributable to Parent, Total	77,287		82,268		149,484	158,421
Goodwill	590,738		579,156		590,738	579,156
Interest Income (Expense), before Provision	278,964		263,830		533,373	520,783
Interest Income (Expense), after Provision for Loan Loss	272,508		257,467		519,982	508,349
Labor and Related Expense	65,456		56,641		130,410	116,513
Information Technology and Data Processing	13,853		12,903		27,978	25,947
Occupancy, Net	8,405		7,386		16,756	15,820
Marketing and Advertising Expense	839		968		1,527	1,805
Equipment Expense	2,319		2,301		4,395	4,331
Professional Fees	1,478		529		2,160	1,343
Payments of Financing Costs	1,296		1,171		2,236	2,516
Federal Deposit Insurance Corporation Premium Expense	0		0		0	0
Amortization of Intangible Assets	0		0		0	0
Other Noninterest Expense	10,376		8,024		18,058	15,427
Allocated indirect expense	70,523		63,408		127,110	124,114
Commercial and business lending	14,231,238		12,531,178		14,231,238	12,531,178
Assets	15,452,018		13,043,969		15,452,018	13,043,969
Operating Segments | Risk Management and Shared Services [Member]
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	16,234		(11,849)		23,882	(15,690)
Net intersegment interest income (expense)	(30,405)		(36,141)		(57,723)	(85,299)
Segment net interest income	(14,171)		(47,990)		(33,841)	(100,989)
Noninterest Income	8,313		3,512		14,336	307
Provision for Loan, Lease, and Other Losses	(8,355)		(8,736)		(24,949)	(20,817)
Noninterest Expense	38,937		0		52,284	0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	(36,440)		(35,744)		(46,840)	(79,865)
Income Tax Expense (Benefit)	(2,640)		(6,681)		(1,843)	(20,301)
Net Income (Loss) Attributable to Parent, Total	(33,800)		(29,063)		(44,997)	(59,564)
Goodwill	0		0		0	0
Interest Income (Expense), before Provision	(5,858)		(44,478)		(19,505)	(100,682)
Interest Income (Expense), after Provision for Loan Loss	2,497		(35,742)		5,444	(79,865)
Labor and Related Expense	71,117		50,204		117,786	92,902
Information Technology and Data Processing	17,721		12,763		32,509	26,267
Occupancy, Net	5,431		5,068		10,588	11,869
Marketing and Advertising Expense	6,581		5,528		12,750	10,143
Equipment Expense	3,098		2,187		6,626	4,678
Professional Fees	15,704		5,924		21,487	10,992
Payments of Financing Costs	23		1,273		302	1,712
Federal Deposit Insurance Corporation Premium Expense	10,595		9,708		19,432	20,144
Amortization of Intangible Assets	6,894		2,203		9,096	4,405
Other Noninterest Expense	1,827		716		1,048	4,507
Allocated indirect expense	(100,054)		(95,574)		(179,340)	(187,619)
Commercial and business lending	499,128		458,535		499,128	458,535
Assets	$ 13,808,403		$ 13,042,039		$ 13,808,403	$ 13,042,039

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Segment Reporting (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Risk Management and Shared Services [Member]
Segment Reporting Information [Line Items]
A portion of total depreciation Equipment expense	$ 6.0	$ 6.0	$ 11.9	$ 14.0
Corporate and Commercial Specialty [Member]
Segment Reporting Information [Line Items]
A portion of total depreciation Technology expense	0.2	0.1	0.3	0.1
Community, Consumer and Business [Member]
Segment Reporting Information [Line Items]
A portion of total depreciation Occupancy expense	$ 6.3	$ 5.9	$ 12.5	$ 11.8

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance		$ (7,566)			$ (7,566)
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	$ (1,901)		$ (2,059)		(3,590)	$ (3,986)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(6,506)		1,264		(14,418)	8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(597)		1,437		(1,343)	2,555
Labor and Related Expense	161,168		126,994		296,341	250,890
Other Comprehensive Income (Loss), Net of Tax	(35,088)	(36,939)	20,847	$ 39,272	(72,027)	60,119
Ending Balance	(79,593)				(79,593)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(28,608)	(2,456)	(23,655)	(48,993)	(2,456)	(48,993)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(36,846)		21,317		(73,377)	53,149
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	1,901		2,059		3,590	3,986
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	0		0		0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0		0		0	0
Labor and Related Expense	0		0		0	0
Other Expenses			0			0
Other Comprehensive Income (Loss), Tax	8,717		(5,830)		17,407	(14,251)
Other Comprehensive Income (Loss), Net of Tax	(26,228)		17,545		(52,380)	42,884
Ending Balance	(54,836)	(28,608)	(6,109)	(23,655)	(54,836)	(6,109)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	2,153	12,894	9,135	(1,268)	12,894	(1,268)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0		0		0	0
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	0		0		0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(6,506)		1,264		(14,418)	8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(597)		1,437		(1,343)	2,555
Labor and Related Expense	0		0		0	0
Other Expenses			0			0
Other Comprehensive Income (Loss), Tax	(1,709)		650		(3,792)	2,668
Other Comprehensive Income (Loss), Net of Tax	(8,812)		3,352		(19,553)	13,755
Ending Balance	(6,659)	2,153	12,487	9,135	(6,659)	12,487
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(18,050)	(18,003)	(20,624)	(24,154)	(18,003)	(24,154)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0		0		0	4,770
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	0		0		0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	0		0		0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0		0		0	0
Labor and Related Expense	63		63		126	126
Other Expenses			(4)			(8)
Other Comprehensive Income (Loss), Tax	15		17		31	(1,157)
Other Comprehensive Income (Loss), Net of Tax	(48)		(50)		(95)	3,480
Ending Balance	(18,098)	(18,050)	(20,674)	(20,624)	(18,098)	(20,674)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(44,505)	(7,566)	(35,144)	(74,416)	(7,566)	(74,416)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(36,846)		21,317		(73,377)	57,919
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	1,901		2,059		3,590	3,986
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(6,506)		1,264		(14,418)	8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(597)		1,437		(1,343)	2,555
Labor and Related Expense	63		63		126	126
Other Expenses			(4)			(8)
Other Comprehensive Income (Loss), Tax	7,023		(5,164)		13,647	(12,740)
Other Comprehensive Income (Loss), Net of Tax	(35,088)	(36,939)	20,847	39,272	(72,027)	60,119
Ending Balance	$ (79,593)	$ (44,505)	$ (14,297)	$ (35,144)	$ (79,593)	$ (14,297)

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Subsequent Events (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Business Combination, Recognized Liability Assumed, Liability [Abstract]
Deposits	$ 39,931,255	$ 35,552,608
Business Combination, Recognized Asset Acquired, Asset [Abstract]
Assets	$ 51,812,506	$ 45,202,596

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Label	Element	Value
Common Stock [Member]
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	22,975,382
BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio	asb_BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio	$ 36.25
Share Price	us-gaap_SharePrice	$ 25.86