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: March 31, 2024

☐	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 April 26, 2024 was 150,766,697.

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	9
	Notes to Consolidated Financial Statements	11
	Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	50
	Item 3. Quantitative and Qualitative Disclosures About Market Risk	71
	Item 4. Controls and Procedures	72
PART II. Other Information
	Item 1. Legal Proceedings	73
	Item 1A. Risk Factors	73
	Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	73
	Item 5. Other Information	73
	Item 6. Exhibits	74
	Signatures	75

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
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
CFPB	Consumer Financial Protection Bureau
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
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
Moody's	Moody’s Investors Service
MSRs	Mortgage Servicing Rights
MVE	Market Value of Equity
NAV	Measured at fair value using Net Asset 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
OREO	Other Real Estate Owned
Parent Company	Associated Banc-Corp individually
RAP	Retirement Account Plan - the Corporation's noncontributory defined benefit retirement plan

3

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
ROCET1	Return on Common Equity Tier 1
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

	Mar 31, 2024		Dec 31, 2023
(In thousands, except share and per share data)	(Unaudited)		(Audited)
Assets
Cash and due from banks	$	429,859	$	484,384
Interest-bearing deposits in other financial institutions	420,114		425,089
Federal funds sold and securities purchased under agreements to resell	1,610		14,350
AFS investment securities, at fair value	3,724,148		3,600,892
HTM investment securities, net, at amortized cost	3,832,967		3,860,160
Equity securities	19,571		41,651
FHLB and Federal Reserve Bank stocks, at cost	173,968		229,171
Residential loans held for sale	52,414		33,011
Commercial loans held for sale	—		90,303
Loans	29,494,263		29,216,218
Allowance for loan losses	(356,006)		(351,094)
Loans, net	29,138,257		28,865,124
Tax credit and other investments	255,252		258,067
Premises and equipment, net	367,618		372,978
Bank and corporate owned life insurance	685,089		682,649
Goodwill	1,104,992		1,104,992
Other intangible assets, net	38,268		40,471
Mortgage servicing rights, net	85,226		84,390
Interest receivable	167,092		169,569
Other assets	640,638		658,604
Total assets	$	41,137,084	$	41,015,855
Liabilities and stockholders' equity
Noninterest-bearing demand deposits	$	6,254,135	$	6,119,956
Interest-bearing deposits	27,459,023		27,326,093
Total deposits	33,713,158		33,446,049
Short-term funding	765,671		326,780
FHLB advances	1,333,411		1,940,194
Other long-term funding	536,055		541,269
Allowance for unfunded commitments	31,776		34,776
Accrued expenses and other liabilities	588,341		552,814
Total liabilities	$	36,968,412	$	36,841,882
Stockholders’ equity
Preferred equity	$	194,112	$	194,112
Common equity
Common stock	$	1,752	$	1,752
Surplus	1,708,652		1,714,822
Retained earnings	2,991,571		2,946,805
Accumulated other comprehensive (loss)	(209,881)		(171,096)
Treasury stock, at cost	(517,533)		(512,421)
Total common equity	3,974,561		3,979,861
Total stockholders’ equity	4,168,673		4,173,973
Total liabilities and stockholders’ equity	$	41,137,084	$	41,015,855
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	175,216,409		175,216,409
Common shares outstanding	150,738,678		151,036,674

Numbers may not sum due to rounding.

See accompanying notes to consolidated financial statements.

5

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP

Consolidated Statements of Income (Unaudited)

	Three Months Ended Mar 31,
(In thousands, except per share data)	2024		2023
Interest income
Interest and fees on loans	$	454,472	$	391,320
Interest and dividends on investment securities
Taxable	46,548		30,142
Tax-exempt	14,774		16,025
Other interest	7,595		5,329
Total interest income	523,388		442,817
Interest expense
Interest on deposits	226,231		109,422
Interest on federal funds purchased and securities sold under agreements to repurchase	2,863		3,143
Interest on other short-term funding	4,708		—
Interest on FHLB advances	21,671		49,960
Interest on long-term funding	10,058		6,281
Total interest expense	265,530		168,807
Net interest income	257,858		274,010
Provision for credit losses	24,001		17,971
Net interest income after provision for credit losses	233,857		256,039
Noninterest income
Wealth management fees	21,694		20,189
Service charges and deposit account fees	12,439		12,994
Card-based fees	11,267		10,586
Other fee-based revenue	4,402		4,276
Capital markets, net	4,050		5,083
Mortgage banking, net	2,662		3,545
Bank and corporate owned life insurance	2,570		2,664
Asset (losses) gains, net	(306)		263
Investment securities gains, net	3,879		51
Other	2,327		2,422
Total noninterest income	64,985		62,073
Noninterest expense
Personnel	119,395		116,420
Technology	26,200		23,598
Occupancy	13,633		15,063
Business development and advertising	6,517		5,849
Equipment	4,599		4,930
Legal and professional	4,672		3,857
Loan and foreclosure costs	1,979		1,138
FDIC assessment	13,946		6,875
Other intangible amortization	2,203		2,203
Other	4,513		7,479
Total noninterest expense	197,657		187,412
Income before income taxes	101,185		130,700
Income tax expense	20,016		27,340
Net income	81,169		103,360
Preferred stock dividends	2,875		2,875
Net income available to common equity	$	78,294	$	100,485
Earnings per common share
Basic	$	0.52	$	0.67
Diluted	$	0.52	$	0.66
Average common shares outstanding
Basic	149,855		149,763
Diluted	151,292		151,128

Numbers may not sum due to rounding.

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 Mar 31,
($ in thousands)	2024		2023
Net income	$	81,169	$	103,360
Other comprehensive income (loss), net of tax
AFS investment securities
Net unrealized (losses) gains	(29,889)		36,478
Amortization of net unrealized losses on AFS securities transferred to HTM securities	2,060		2,267
Reclassification adjustment for net losses realized in net income	197		—
Income tax benefit (expense)	6,885		(9,892)
Other comprehensive (loss) income on AFS securities	(20,746)		28,853
Cash flow hedge derivatives
Net unrealized (losses) gains	(19,461)		13,763
Reclassification adjustment for net losses realized in net income	4,823		1,262
Income tax (expense)	(1,688)		(4,694)
Other comprehensive (loss) income on cash flow hedge derivatives	(16,326)		10,331
Defined benefit pension and postretirement obligations
Amortization of prior service cost	(72)		(81)
Amortization of actuarial (gain) loss	(7)		30
Income tax (expense) benefit	(1,633)		79
Other comprehensive (loss) income on pension and postretirement obligations	(1,712)		27
Total other comprehensive (loss) income	(38,785)		39,211
Comprehensive income	$	42,384	$	142,571

Numbers may not sum due to rounding.

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, 2023	$	194,112	$	1,752	$	1,714,822	$	2,946,805	$	(171,096)	$	(512,421)	$	4,173,973
Comprehensive income:
Net income	—		—		—		81,169		—		—		81,169
Other comprehensive (loss)	—		—		—		—		(38,785)		—		(38,785)
Comprehensive income													42,384
Common stock issued:
Stock-based compensation plans, net	—		—		(13,839)		—		—		17,749		3,910
Purchase of treasury stock, open market purchases	—		—		—		—		—		(18,289)		(18,289)
Purchase of treasury stock, stock-based compensation plans	—		—		—		—		—		(4,572)		(4,572)
Cash dividends:
Common stock, $0.22 per share	—		—		—		(33,527)		—		—		(33,527)
Preferred stock(a)	—		—		—		(2,875)		—		—		(2,875)
Stock-based compensation expense, net	—		—		7,669		—		—		—		7,669
Balance, March 31, 2024	$	194,112	$	1,752	$	1,708,652	$	2,991,571	$	(209,881)	$	(517,533)	$	4,168,673

Numbers may not sum due to rounding.

(a) Series E, $0.3671875 per share; and Series F, $0.3515625 per share.

(In thousands, except per share data)	Preferred Equity		Common Stock		Surplus		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Treasury Stock		Total
Balance, December 31, 2022	$	194,112	$	1,752	$	1,712,733	$	2,904,882	$	(272,799)	$	(525,190)	$	4,015,490
Comprehensive income:
Net income	—		—		—		103,360		—		—		103,360
Other comprehensive income	—		—		—		—		39,211		—		39,211
Comprehensive income													142,571
Common stock issued:
Stock-based compensation plans, net	—		—		(12,612)		—		—		14,379		1,766
Purchase of treasury stock, stock-based compensation plans	—		—		—		—		—		(5,362)		(5,362)
Cash dividends:
Common stock, $0.21 per share	—		—		—		(32,013)		—		—		(32,013)
Preferred stock(a)	—		—		—		(2,875)		—		—		(2,875)
Stock-based compensation expense, net	—		—		6,086		—		—		—		6,086
Balance, March 31, 2023	$	194,112	$	1,752	$	1,706,206	$	2,973,354	$	(233,588)	$	(516,173)	$	4,125,663

Numbers may not sum due to rounding.

(a) Series E, $0.3671875 per share; and Series F, $0.3515625 per share.

See accompanying notes to consolidated financial statements.

8

Item 1. Financial Statements Continued:

ASSOCIATED BANC-CORP

Consolidated Statements of Cash Flows (Unaudited)

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Cash flows from operating activities
Net income	$	81,169	$	103,360
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	24,001		17,971
Depreciation and amortization	12,352		11,425
Change in MSRs valuation	(1,646)		1,857
Amortization of other intangible assets	2,203		2,203
Amortization and accretion on earning assets, funding, and other, net	10,673		338
Net amortization of tax credit investments	8,990		8,574
(Gains) on sales of investment securities, net	(3,857)		—
Asset losses (gains), net	306		(263)
(Gains) loss on mortgage banking activities, net	(22)		251
Mortgage loans originated and acquired for sale	(105,394)		(69,254)
Proceeds from sales of mortgage loans held for sale	91,026		54,652
Changes in certain assets and liabilities:
Decrease (increase) in interest receivable	2,477		(7,955)
Increase in interest payable	15,590		14,775
(Decrease) in expense payable	(30,827)		(52,396)
Increase (decrease) in net derivative position	35,008		(42,403)
Net change in other assets and other liabilities	12,453		4,336
Net cash provided by operating activities	154,500		47,470
Cash flows from investing activities
Net (increase) in loans	(222,656)		(414,268)
Purchases of:
AFS securities	(341,275)		(681,386)
HTM securities	—		(41,524)
FHLB and Federal Reserve Bank stocks and equity securities	(16,585)		(56,892)
Proceeds from:
Sales of AFS securities	9,472		—
Sale of FHLB and Federal Reserve Bank stocks and equity securities	98,005		15,765
Prepayments, calls, and maturities of AFS securities	176,266		79,746
Prepayments, calls, and maturities of HTM securities	28,026		33,053
Sales, prepayments, calls, and maturities of other assets	4,337		10,115
Premises, equipment, and software	(8,500)		(13,898)
Net change in tax credit and alternative investments	(2,409)		(7,033)
Net cash (used in) investing activities	(275,320)		(1,076,322)
Cash flows from financing activities
Net increase in deposits	267,109		695,723
Net increase (decrease) in short-term funding	438,891		(379,329)
Net (decrease) increase in short-term FHLB advances	(602,000)		660,000
Repayment of long-term FHLB advances	(664)		(507)
Proceeds from long-term FHLB advances	619		115
Proceeds from issuance of long-term funding	—		292,740
(Repayment) of finance lease principal	(22)		(21)
Proceeds from issuance of common stock for stock-based compensation plans	3,910		1,766
Purchase of treasury stock, open market purchases	(18,289)		—
Purchase of treasury stock, stock-based compensation plans	(4,572)		(5,362)
Cash dividends on common stock	(33,527)		(32,013)
Cash dividends on preferred stock	(2,875)		(2,875)
Net cash provided by financing activities	48,580		1,230,238
Net (decrease) increase in cash and cash equivalents	(72,239)		201,385
Cash and cash equivalents at beginning of period	923,823		621,455
Cash and cash equivalents at end of period(a)	$	851,583	$	822,840

Numbers may not sum due to rounding.

(a) No restricted cash due to the Federal Reserve reducing the required reserve ratio to zero.

9

ASSOCIATED BANC-CORP

Consolidated Statements of Cash Flows (Unaudited)

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Supplemental disclosures of cash flow information
Cash paid for interest	$	249,660	$	153,760
Cash paid for income and franchise taxes	1,995		1,086
Loans and bank premises transferred to OREO	577		3,599
Capitalized mortgage servicing rights	877		474
Loans transferred (from) into held for sale from (into) portfolio, net	(86,096)		94
Fair value adjustments on hedged long-term FHLB advances and subordinated debt	10,210		(10,724)
Fair value adjustments on foreign currency exchange forwards	2,708		(341)
Fair value adjustment on cash flow hedges	(16,326)		10,331

10

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 2023 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 and Parent Company 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 sum 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 2023 Annual Report on Form 10-K.

New Accounting Pronouncements Adopted

Standard	Description	Date of adoption	Effect on financial statements
ASU 2023-02 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method	The amendments in this update permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. A reporting entity may make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing to apply the proportional amortization method at the reporting entity level or to individual investments. The amendments in this update also remove certain guidance for Qualified Affordable Housing Project investments and require the application of the delayed equity contribution guidance to all tax equity investments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and must be applied on either a modified retrospective or a retrospective basis. Early adoption is permitted in any interim period, however if adopted in an interim period the entity shall adopt the amendments in this update as of the beginning of the fiscal year that includes the interim period.	1st Quarter 2024	The Corporation has determined the impact on its results of operation, financial position, liquidity, and disclosures is immaterial.

11

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 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures	The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted.	Fiscal year 2024 and interim periods beginning in 1st quarter 2025	The Corporation is currently evaluating the impact on its disclosures.
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures	The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and are to be applied on a prospective basis. Early adoption is permitted.	1st Quarter 2025	The Corporation is currently evaluating the impact on its disclosures.

Note 3 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 Mar 31,
($ in thousands, except per share data)	2024		2023
Net income	$	81,169	$	103,360
Preferred stock dividends	(2,875)		(2,875)
Net income available to common equity	$	78,294	$	100,485
Common shareholder dividends	(33,407)		(31,808)
Unvested share-based payment awards	(120)		(205)
Undistributed earnings	$	44,767	$	68,472
Undistributed earnings allocated to common shareholders	$	44,524	$	68,086
Undistributed earnings allocated to unvested share-based payment awards	242		386
Undistributed earnings	$	44,767	$	68,472
Basic
Distributed earnings to common shareholders	$	33,407	$	31,808
Undistributed earnings allocated to common shareholders	44,524		68,086
Total common shareholders earnings, basic	$	77,932	$	99,894
Diluted
Distributed earnings to common shareholders	$	33,407	$	31,808
Undistributed earnings allocated to common shareholders	44,524		68,086
Total common shareholders earnings, diluted	$	77,932	$	99,894
Weighted average common shares outstanding	149,855		149,763
Effect of dilutive common stock awards	1,436		1,365
Diluted weighted average common shares outstanding	151,292		151,128
Basic earnings per common share	$	0.52	$	0.67
Diluted earnings per common share	$	0.52	$	0.66

12

Approximately 2 million anti-dilutive common stock options were excluded from the earnings per common share calculations for both the three months ended March 31, 2024 and 2023.

Note 4 Stock-Based Compensation

The fair values of stock options and restricted stock awards 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 2017 Incentive Compensation Plan and the 2020 Incentive Compensation Plan, expenses related to stock options and restricted stock awards 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 three months ended March 31, 2024 is presented below:

Stock Options	Shares(a)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value(a)
Outstanding at December 31, 2023	3,792	$	21.25	4.26 years	$	5,834
Exercised	179	17.27
Outstanding at March 31, 2024	3,613	$	21.45	4.08 years	$	5,299
Options Exercisable at March 31, 2024	3,613	$	21.45	4.08 years	$	5,299

(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 three months ended March 31, 2024, the intrinsic value of stock options exercised was approximately $722,000, compared to approximately $219,000 for the three months ended March 31, 2023. For the three months ended March 31, 2024, the total fair value of stock options vested was approximately $489,000 compared to approximately $955,000 for the three months ended March 31, 2023.

The Corporation also has issued time-based and performance-based restricted stock awards under the 2017 Incentive Compensation Plan and subsequent 2020 Incentive Compensation Plan. Performance 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 awards activity for the three months ended March 31, 2024:

Restricted Stock	Shares(a)	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2023	2,349	$	21.20
Granted	802	21.00
Vested	631	24.39
Forfeited	4	22.05
Outstanding at March 31, 2024	2,516	$	21.33

(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 awards granted during 2023 and 2024 will cliff-vest after the three year performance period has ended. Service-based restricted stock awards granted during 2023 and 2024 will generally vest ratably over a period of four years. Expense for restricted stock awards of $8 million was recorded for the three months ended March 31, 2024, compared to $6 million for the three months ended March 31, 2023. Included in compensation expense for the first three months of 2024 was $3 million of expense for the accelerated vesting of restricted stock awards granted to retirement eligible colleagues. The Corporation had $30 million of unrecognized compensation costs related to restricted stock awards at March 31, 2024 that are expected to be recognized over the remaining requisite service periods that extend predominately through the first quarter of 2028.

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 awards. 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.

13

Note 5 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 March 31, 2024 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,985	$	—	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	83,823		1		(2,995)		80,830
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		221		(156,880)		1,090,998
GNMA	2,219,058		6,114		(10,658)		2,214,513
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		—		(1,595)		17,008
GNMA	159,523		—		(7,291)		152,232
Asset backed securities:
FFELP	130,196		22		(1,065)		129,154
SBA	916		1		(28)		890
Other debt securities	3,000		—		(35)		2,965
Total AFS investment securities	$	3,902,762	$	6,359	$	(184,973)	$	3,724,148
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	1,676,275		2,292		(154,833)		1,523,734
Residential mortgage-related securities:
FNMA/FHLMC	930,148		26,023		(184,227)		771,944
GNMA	48,043		24		(3,609)		44,457
Private-label	341,153		9,399		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		12,068		(162,450)		628,928
GNMA	57,114		338		(7,270)		50,183
Total HTM investment securities	$	3,833,043	$	50,145	$	(581,903)	$	3,301,284

14

The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,984	$	—	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	94,008		23		(2,214)		91,817
Residential mortgage-related securities:
FNMA/FHLMC	1,274,052		294		(153,552)		1,120,794
GNMA	2,021,242		24,254		(2,822)		2,042,675
Commercial mortgage-related securities:
FNMA/FHLMC	18,691		—		(1,755)		16,937
GNMA	161,928		—		(7,135)		154,793
Asset backed securities:
FFELP	135,832		5		(1,862)		133,975
SBA	1,077		2		(28)		1,051
Other debt securities	3,000		—		(50)		2,950
Total AFS investment securities	$	3,749,814	$	24,579	$	(173,501)	$	3,600,892
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	1,682,473		5,638		(134,053)		1,554,059
Residential mortgage-related securities:
FNMA/FHLMC	941,973		27,007		(164,587)		804,393
GNMA	48,979		92		(2,901)		46,170
Private-label	345,083		9,796		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		12,699		(160,781)		632,914
GNMA	59,733		386		(7,500)		52,619
Total HTM investment securities	$	3,860,235	$	55,619	$	(535,230)	$	3,380,624

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 March 31, 2024, are shown below:

	AFS					HTM
($ in thousands)	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Due in one year or less	$	1,915	$	1,902		$	11,061	$	11,011
Due after one year through five years	47,142		42,470			58,092		57,522
Due after five years through ten years	50,863		48,613			166,954		162,309
Due after ten years	26,888		26,368			1,441,167		1,293,862
Total debt securities	126,808		119,353			1,677,274		1,524,703
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		1,090,998			930,148		771,944
GNMA	2,219,058		2,214,513			48,043		44,457
Private-label	—		—			341,153		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		17,008			779,310		628,928
GNMA	159,523		152,232			57,114		50,183
Asset backed securities:
FFELP	130,196		129,154			—		—
SBA	916		890			—		—
Total investment securities	$	3,902,762	$	3,724,148		$	3,833,043	$	3,301,284
Ratio of fair value to amortized cost			95.4		%			86.1		%

15

On a quarterly basis, the Corporation refreshes the credit quality of each HTM security. The following table summarizes the credit quality indicators of HTM securities at amortized cost at March 31, 2024:

($ in thousands)	AAA		AA		A		Not Rated		Total
U.S. Treasury securities	$	999	$	—	$	—	$	—	$	999
Obligations of state and political subdivisions (municipal securities)	768,220		901,215		5,685		1,154		1,676,275
Residential mortgage-related securities:
FNMA/FHLMC	930,148		—		—		—		930,148
GNMA	48,043		—		—		—		48,043
Private-label	341,153		—		—		—		341,153
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		—		—		—		779,310
GNMA	57,114		—		—		—		57,114
Total HTM securities	$	2,924,988	$	901,215	$	5,685	$	1,154	$	3,833,043

The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2023:

($ in thousands)	AAA		AA		A		Not Rated		Total
U.S. Treasury securities	$	999	$	—	$	—	$	—	$	999
Obligations of state and political subdivisions (municipal securities)	760,329		915,303		5,687		1,155		1,682,473
Residential mortgage-related securities:
FNMA/FHLMC	941,973		—		—		—		941,973
GNMA	48,979		—		—		—		48,979
Private-label	345,083		—		—		—		345,083
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		—		—		—		780,995
GNMA	59,733		—		—		—		59,733
Total HTM securities	$	2,938,090	$	915,303	$	5,687	$	1,155	$	3,860,235

The following table summarizes gross realized gains and losses on AFS securities, the gain on sale and net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three months ended March 31, 2024 and 2023:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Gross realized (losses) on AFS securities	$	(197)	$	—
Gain on sale and net write-up (down) of equity securities	4,076		51
Investment securities gains (losses), net	$	3,879	$	51
Proceeds from sales of AFS investment securities	$	9,472	$	—

During the first quarter of 2024, the Corporation sold its remaining Visa Class B restricted shares at a gain of $4 million.

Investment securities with a carrying value of $1.5 billion and $1.6 billion at March 31, 2024 and December 31, 2023, respectively, were pledged as required to secure certain deposits or for other purposes.

Accrued interest receivable on HTM securities totaled $16 million and $18 million at March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable on AFS securities totaled $16 million and $15 million at March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets.

The allowance for credit losses on HTM securities was approximately $76,000 at March 31, 2024 and approximately $75,000 at December 31, 2023, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The Corporation also 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 15% of losses and, as a result, no allowance for credit losses has been recorded related to these securities.

16

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 March 31, 2024:

	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
U.S. Treasury securities	—	$	—	$	—	1	$	(4,427)	$	35,558	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	27	(218)		13,847		108	(2,777)		64,217		(2,995)		78,064
Residential mortgage-related securities:
FNMA/FHLMC	24	(694)		31,375		71	(156,185)		1,045,343		(156,880)		1,076,718
GNMA	59	(7,016)		1,122,930		10	(3,643)		105,462		(10,658)		1,228,391
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,595)		17,008		(1,595)		17,008
GNMA	1	(337)		13,668		30	(6,954)		138,564		(7,291)		152,232
Asset backed securities:
FFELP	2	(116)		40,177		12	(949)		75,411		(1,065)		115,588
SBA	—	—		—		5	(28)		677		(28)		677
Other debt securities	1	(7)		993		2	(28)		1,972		(35)		2,965
Total	114	$	(8,388)	$	1,222,990	240	$	(176,585)	$	1,484,212	$	(184,973)	$	2,707,201
HTM investment securities
U.S. Treasury securities	—	$	—	$	—	1	$	(30)	$	969	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	287	(2,536)		324,576		653	(152,297)		916,225		(154,833)		1,240,801
Residential mortgage-related securities:
FNMA/FHLMC	5	(40)		3,489		113	(184,186)		768,182		(184,227)		771,671
GNMA	6	(99)		8,674		79	(3,511)		34,346		(3,609)		43,020
Private-label	—	—		—		18	(69,484)		281,069		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	1	(263)		8,003		44	(162,187)		620,926		(162,450)		628,928
GNMA	—	—		—		13	(7,270)		50,183		(7,270)		50,183
Total	299	$	(2,938)	$	344,741	921	$	(578,965)	$	2,671,899	$	(581,903)	$	3,016,640

17

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, 2023:

	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
U.S. Treasury securities	—	$	—	$	—	1	$	(4,083)	$	35,902	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	41	(347)		23,762		92	(1,867)		53,022		(2,214)		76,784
Residential mortgage-related securities:
FNMA/FHLMC	18	(333)		22,870		71	(153,219)		1,080,337		(153,552)		1,103,207
GNMA	13	(924)		156,847		5	(1,898)		26,643		(2,822)		183,490
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,755)		16,937		(1,755)		16,937
GNMA	9	(3,160)		103,055		22	(3,975)		51,738		(7,135)		154,793
Asset backed securities:
FFELP	—	—		—		14	(1,862)		125,339		(1,862)		125,339
SBA	—	—		—		5	(28)		761		(28)		761
Other debt securities	1	(9)		991		2	(42)		1,958		(50)		2,950
Total	82	$	(4,773)	$	307,527	213	$	(168,728)	$	1,392,635	$	(173,501)	$	1,700,162
HTM investment securities
U.S. Treasury securities	—	$	—	$	—	1	$	(36)	$	963	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	182	(1,535)		180,270		537	(132,518)		792,940		(134,053)		973,210
Residential mortgage-related securities:
FNMA/FHLMC	20	(511)		30,323		94	(164,076)		771,042		(164,587)		801,365
GNMA	2	(17)		2,128		78	(2,884)		34,626		(2,901)		36,754
Private-label	—	—		—		18	(65,372)		289,507		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	1	(121)		8,144		44	(160,660)		624,770		(160,781)		632,914
GNMA	—	—		—		13	(7,500)		52,619		(7,500)		52,619
Total	205	$	(2,184)	$	220,865	785	$	(533,046)	$	2,566,468	$	(535,230)	$	2,787,333

The Corporation reviews the AFS investment securities portfolio on a quarterly basis to monitor its credit exposure. A determination as to whether a security’s decline in fair value is the result of credit risk takes into consideration numerous factors and the relative significance of any single factor can vary by security. Some factors the Corporation may consider in this impairment analysis include the extent to which the security has been in an unrealized loss position, the change in security rating, financial condition and near-term prospects of the issuer, as well as the security and industry specific economic conditions.

Based on the Corporation’s evaluation, management does not believe any unrealized losses at March 31, 2024 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions. As of March 31, 2024, 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.

FHLB and Federal Reserve Bank stocks: The Corporation is required to maintain Federal Reserve Bank stock and FHLB stock as a member bank of both the Federal Reserve System and the FHLB, and in amounts as required by these institutions. These equity securities are “restricted” in that they can only be sold back to the respective institutions or another member institution at par. Therefore, they are less liquid than other marketable equity securities and their fair value is equal to amortized cost. The Corporation had FHLB stock of $86 million and $143 million at March 31, 2024 and December 31, 2023, respectively. The Corporation had Federal Reserve Bank stock of $88 million and $87 million at March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable on FHLB stock totaled $2 million and $4 million at March 31, 2024 and December 31, 2023, respectively. There was approximately $921,000 of accrued interest receivable on Federal Reserve Bank Stock at March 31, 2024 and none at December 31, 2023. Accrued interest receivable on both FHLB stock and Federal Reserve Bank stock is included in interest receivable on the consolidated balance sheets.

18

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 CRA Qualified Investment mutual funds and other mutual funds. The Corporation had equity securities with readily determinable fair values of $7 million at both March 31, 2024 and December 31, 2023.

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 $13 million and $35 million at March 31, 2024 and December 31, 2023, respectively. During the first quarter of 2024, the Corporation sold all of its remaining Visa Class B restricted shares.

Note 6 Loans

The period end loan composition was as follows:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commercial and industrial	$	9,858,329	$	9,731,555
Commercial real estate — owner occupied	1,095,894		1,061,700
Commercial and business lending	10,954,223		10,793,255
Commercial real estate — investor	5,035,195		5,124,245
Real estate construction	2,287,041		2,271,398
Commercial real estate lending	7,322,237		7,395,644
Total commercial	18,276,460		18,188,898
Residential mortgage	7,868,180		7,864,891
Auto finance	2,471,257		2,256,162
Home equity	619,764		628,526
Other consumer	258,603		277,740
Total consumer	11,217,802		11,027,319
Total loans	$	29,494,263	$	29,216,218

Accrued interest receivable on loans totaled $133 million at March 31, 2024, and $132 million at December 31, 2023, and is included in interest receivable on the consolidated balance sheets. Interest accrued but not received is reversed against interest income when a loan is placed on nonaccrual.

19

The following table presents loans by credit quality indicator by origination year at March 31, 2024:

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	279	$	1,732,197	$	318,587	$	1,758,151	$	2,806,636	$	1,701,638	$	380,164	$	774,950	$	9,472,322
Special mention	—		14,287		—		13,305		24,216		27,909		3,392		865		83,973
Substandard	434		23,288		44,013		2,283		82,394		59,491		17,184		1,138		229,791
Nonaccrual	3,157		—		2,938		12,629		14,495		17,599		—		24,582		72,243
Commercial and industrial	$	3,869	$	1,769,772	$	365,538	$	1,786,369	$	2,927,740	$	1,806,637	$	400,739	$	801,535	$	9,858,329
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	11,455	$	56,257	$	196,065	$	191,357	$	234,852	$	133,883	$	218,224	$	1,042,093
Special mention	—		94		—		—		—		—		—		—		94
Substandard	—		950		2,667		18,003		2,083		12,376		8,423		7,114		51,616
Nonaccrual	—		—		722		1,368		—		—		—		—		2,090
Commercial real estate - owner occupied	$	—	$	12,500	$	59,646	$	215,436	$	193,440	$	247,228	$	142,306	$	225,339	$	1,095,894
Commercial and business lending:
Risk rating:
Pass	$	279	$	1,743,652	$	374,844	$	1,954,216	$	2,997,992	$	1,936,490	$	514,047	$	993,174	$	10,514,415
Special mention	—		14,381		—		13,305		24,216		27,909		3,392		865		84,068
Substandard	434		24,239		46,680		20,286		84,477		71,867		25,606		8,252		281,408
Nonaccrual	3,157		—		3,659		13,997		14,495		17,599		—		24,582		74,333
Commercial and business lending	$	3,869	$	1,782,272	$	425,184	$	2,001,805	$	3,121,180	$	2,053,865	$	543,045	$	1,026,873	$	10,954,223
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	131,383	$	196,066	$	1,162,643	$	1,274,328	$	1,014,759	$	418,534	$	550,600	$	4,748,313
Special mention	—		502		—		—		22,494		9,238		—		35,614		67,848
Substandard	—		—		38,662		94,918		33,540		25,949		975		6,293		200,338
Nonaccrual	—		—		—		—		—		—		—		18,697		18,697
Commercial real estate - investor	$	—	$	131,886	$	234,727	$	1,257,561	$	1,330,362	$	1,049,946	$	419,509	$	611,204	$	5,035,195
Real estate construction:
Risk rating:
Pass	$	—	$	24,266	$	58,519	$	474,768	$	1,177,598	$	494,047	$	45,034	$	12,792	$	2,287,023
Nonaccrual	—		—		—		—		—		—		—		18		18
Real estate construction	$	—	$	24,266	$	58,519	$	474,768	$	1,177,598	$	494,047	$	45,034	$	12,810	$	2,287,041
Commercial real estate lending:
Risk rating:
Pass	$	—	$	155,649	$	254,585	$	1,637,410	$	2,451,926	$	1,508,806	$	463,568	$	563,392	$	7,035,336
Special mention	—		502		—		—		22,494		9,238		—		35,614		67,848
Substandard	—		—		38,662		94,918		33,540		25,949		975		6,293		200,338
Nonaccrual	—		—		—		—		—		—		—		18,715		18,715
Commercial real estate lending	$	—	$	156,151	$	293,246	$	1,732,329	$	2,507,960	$	1,543,993	$	464,543	$	624,014	$	7,322,237
Total commercial:
Risk rating:
Pass	$	279	$	1,899,301	$	629,429	$	3,591,627	$	5,449,918	$	3,445,296	$	977,615	$	1,556,566	$	17,549,751
Special mention	—		14,883		—		13,305		46,710		37,146		3,392		36,480		151,916
Substandard	434		24,239		85,342		115,205		118,017		97,816		26,582		14,545		481,745
Nonaccrual	3,157		—		3,659		13,997		14,495		17,599		—		43,297		93,047
Total commercial	$	3,869	$	1,938,423	$	718,430	$	3,734,133	$	5,629,140	$	3,597,858	$	1,007,588	$	1,650,888	$	18,276,460

20

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	23,550	$	396,223	$	1,657,013	$	2,086,129	$	1,389,566	$	2,244,891	$	7,797,372
Special mention	—		—		—		—		—		—		—		94		94
Substandard	—		—		—		467		92		—		—		199		759
Nonaccrual	—		—		877		1,264		10,501		9,712		8,575		39,026		69,954
Residential mortgage	$	—	$	—	$	24,427	$	397,954	$	1,667,606	$	2,095,841	$	1,398,141	$	2,284,210	$	7,868,180
Auto finance:
Risk rating:
Pass	$	—	$	—	$	384,126	$	1,133,964	$	874,922	$	68,423	$	137	$	352	$	2,461,925
Special mention	—		—		—		634		1,398		117		—		—		2,148
Substandard	—		—		—		26		—		—		—		—		26
Nonaccrual	—		—		21		1,682		4,898		554		—		2		7,158
Auto finance	$	—	$	—	$	384,147	$	1,136,306	$	881,218	$	69,094	$	137	$	354	$	2,471,257
Home equity:
Risk rating:
Pass	$	3,830	$	514,998	$	21	$	1,508	$	29,539	$	5,949	$	2,278	$	56,995	$	611,286
Special mention	17		53		—		46		38		—		—		175		312
Substandard	—		—		—		9		—		—		—		56		65
Nonaccrual	505		76		31		—		671		141		120		7,061		8,100
Home equity	$	4,352	$	515,127	$	51	$	1,563	$	30,248	$	6,090	$	2,398	$	64,286	$	619,764
Other consumer:
Risk rating:
Pass	$	75	$	186,540	$	1,489	$	4,995	$	2,823	$	1,474	$	781	$	57,722	$	255,824
Special mention	3		850		—		14		24		6		7		3		904
Substandard	—		1,788		—		—		—		—		—		—		1,788
Nonaccrual	4		61		—		9		7		—		—		11		87
Other consumer	$	82	$	189,238	$	1,489	$	5,018	$	2,854	$	1,480	$	788	$	57,735	$	258,603
Total consumer:
Risk rating:
Pass	$	3,905	$	701,538	$	409,186	$	1,536,690	$	2,564,297	$	2,161,975	$	1,392,762	$	2,359,959	$	11,126,407
Special mention	20		904		—		694		1,459		123		7		272		3,459
Substandard	—		1,788		—		502		92		—		—		255		2,637
Nonaccrual	509		137		928		2,955		16,077		10,407		8,695		46,100		85,299
Total consumer	$	4,434	$	704,365	$	410,115	$	1,540,841	$	2,581,926	$	2,172,506	$	1,401,464	$	2,406,586	$	11,217,802
Total loans:
Risk rating:
Pass	$	4,184	$	2,600,839	$	1,038,615	$	5,128,316	$	8,014,215	$	5,607,272	$	2,370,376	$	3,916,525	$	28,676,159
Special mention	20		15,787		—		13,999		48,169		37,270		3,399		36,752		155,375
Substandard	434		26,026		85,342		115,707		118,109		97,816		26,582		14,800		484,383
Nonaccrual	3,666		137		4,588		16,952		30,572		28,007		8,695		89,396		178,346
Total loans	$	8,303	$	2,642,788	$	1,128,545	$	5,274,974	$	8,211,066	$	5,770,365	$	2,409,052	$	4,057,474	$	29,494,263

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

21

The following table presents loans by credit quality indicator by origination year at December 31, 2023:

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	1,380	$	1,693,249	$	1,736,617	$	2,877,173	$	1,824,362	$	398,046	$	383,695	$	449,006	$	9,362,149
Special mention	—		21,779		4,017		46,610		8,525		3,529		—		25,341		109,801
Substandard	804		81,924		10,515		39,748		47,279		17,732		94		291		197,582
Nonaccrual	6,414		—		13,317		14,188		33,891		627		—		—		62,022
Commercial and industrial	$	8,598	$	1,796,951	$	1,764,466	$	2,977,719	$	1,914,057	$	419,934	$	383,789	$	474,638	$	9,731,555
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	15,393	$	204,039	$	188,003	$	239,218	$	136,535	$	135,730	$	92,339	$	1,011,259
Special mention	—		271		—		—		6,150		2,635		—		1,293		10,349
Substandard	—		292		14,735		2,791		6,416		8,537		3,086		2,841		38,699
Nonaccrual	—		—		1,394		—		—		—		—		—		1,394
Commercial real estate - owner occupied	$	—	$	15,957	$	220,168	$	190,794	$	251,783	$	147,708	$	138,816	$	96,473	$	1,061,700
Commercial and business lending:
Risk rating:
Pass	$	1,380	$	1,708,642	$	1,940,657	$	3,065,177	$	2,063,580	$	534,581	$	519,426	$	541,345	$	10,373,408
Special mention	—		22,050		4,017		46,610		14,675		6,164		—		26,634		120,150
Substandard	804		82,216		25,250		42,539		53,695		26,269		3,180		3,132		236,281
Nonaccrual	6,414		—		14,710		14,188		33,891		627		—		—		63,416
Commercial and business lending	$	8,598	$	1,812,909	$	1,984,635	$	3,168,514	$	2,165,840	$	567,642	$	522,606	$	571,111	$	10,793,255
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	155,109	$	1,263,866	$	1,247,434	$	1,080,425	$	471,371	$	358,996	$	239,230	$	4,816,433
Special mention	—		502		4,248		25,474		26,208		—		29,772		6,014		92,218
Substandard	—		—		106,002		69,584		15,000		983		—		24,025		215,595
Commercial real estate - investor	$	—	$	155,611	$	1,374,116	$	1,342,492	$	1,121,633	$	472,355	$	388,768	$	269,269	$	5,124,245
Real estate construction:
Risk rating:
Pass	$	—	$	23,307	$	422,277	$	1,176,608	$	547,825	$	87,680	$	5,740	$	7,954	$	2,271,392
Nonaccrual	—		—		—		—		—		—		—		6		6
Real estate construction	$	—	$	23,307	$	422,277	$	1,176,608	$	547,825	$	87,680	$	5,740	$	7,960	$	2,271,398
Commercial real estate lending:
Risk rating:
Pass	$	—	$	178,416	$	1,686,143	$	2,424,042	$	1,628,250	$	559,052	$	364,737	$	247,184	$	7,087,824
Special mention	—		502		4,248		25,474		26,208		—		29,772		6,014		92,218
Substandard	—		—		106,002		69,584		15,000		983		—		24,025		215,595
Nonaccrual	—		—		—		—		—		—		—		6		6
Commercial real estate lending	$	—	$	178,918	$	1,796,393	$	2,519,100	$	1,669,458	$	560,035	$	394,508	$	277,230	$	7,395,644

22

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Total commercial:
Risk rating:
Pass	$	1,380	$	1,887,058	$	3,626,800	$	5,489,219	$	3,691,830	$	1,093,633	$	884,162	$	788,529	$	17,461,232
Special mention	—		22,552		8,265		72,084		40,882		6,164		29,772		32,648		212,368
Substandard	804		82,216		131,253		112,123		68,695		27,253		3,180		27,157		451,876
Nonaccrual	6,414		—		14,710		14,188		33,891		627		—		6		63,422
Total commercial	$	8,598	$	1,991,827	$	3,781,028	$	5,687,614	$	3,835,298	$	1,127,677	$	917,114	$	848,341	$	18,188,898
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	352,321	$	1,617,409	$	2,110,577	$	1,414,186	$	647,778	$	1,650,542	$	7,792,813
Special mention	—		—		—		—		—		—		95		57		152
Substandard	—		—		490		93		—		—		174		26		784
Nonaccrual	—		—		1,425		9,567		9,259		10,397		6,628		33,865		71,142
Residential mortgage	$	—	$	—	$	354,236	$	1,627,070	$	2,119,836	$	1,424,583	$	654,675	$	1,684,490	$	7,864,891
Auto finance:
Risk rating:
Pass	$	—	$	—	$	1,218,820	$	952,839	$	75,209	$	163	$	456	$	132	$	2,247,618
Special mention	—		—		619		1,850		205		—		—		—		2,674
Substandard	—		—		—		73		—		—		—		—		73
Nonaccrual	—		—		1,032		4,332		430		—		3		—		5,797
Auto finance	$	—	$	—	$	1,220,471	$	959,094	$	75,844	$	163	$	458	$	132	$	2,256,162
Home equity:
Risk rating:
Pass	$	8,703	$	521,000	$	1,678	$	29,863	$	6,084	$	2,327	$	4,891	$	53,350	$	619,192
Special mention	179		200		—		87		—		29		15		378		708
Substandard	10		75		10		—		—		—		33		—		118
Nonaccrual	1,302		160		29		495		132		144		368		7,180		8,508
Home equity	$	10,195	$	521,434	$	1,717	$	30,445	$	6,217	$	2,500	$	5,308	$	60,907	$	628,526
Other consumer:
Risk rating:
Pass	$	121	$	196,632	$	6,419	$	3,732	$	2,658	$	1,127	$	460	$	64,121	$	275,149
Special mention	26		843		9		—		3		20		—		6		881
Substandard	—		1,582		—		—		—		—		—		—		1,582
Nonaccrual	27		71		10		1		6		2		8		29		128
Other consumer	$	174	$	199,129	$	6,438	$	3,733	$	2,668	$	1,149	$	468	$	64,156	$	277,740
Total consumer:
Risk rating:
Pass	$	8,824	$	717,632	$	1,579,238	$	2,603,843	$	2,194,529	$	1,417,802	$	653,584	$	1,768,145	$	10,934,773
Special mention	205		1,043		628		1,936		208		49		110		441		4,416
Substandard	10		1,656		500		166		—		—		207		26		2,556
Nonaccrual	1,330		231		2,496		14,396		9,827		10,544		7,007		41,073		85,574
Total consumer	$	10,369	$	720,563	$	1,582,862	$	2,620,341	$	2,204,564	$	1,428,395	$	660,909	$	1,809,685	$	11,027,319
Total loans:
Risk rating:
Pass	$	10,204	$	2,604,690	$	5,206,038	$	8,093,062	$	5,886,359	$	2,511,435	$	1,537,747	$	2,556,674	$	28,396,005
Special mention	205		23,595		8,893		74,020		41,091		6,213		29,882		33,089		216,784
Substandard	814		83,872		131,753		112,289		68,695		27,253		3,387		27,183		454,432
Nonaccrual	7,744		231		17,206		28,584		43,718		11,170		7,007		41,080		148,997
Total loans	$	18,966	$	2,712,389	$	5,363,890	$	8,307,956	$	6,039,862	$	2,556,071	$	1,578,023	$	2,658,026	$	29,216,218

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

23

The following table presents gross charge offs by origination year for the three months ended March 31, 2024:

			Gross Charge Offs by Origination Year
($ in thousands)	Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Commercial and industrial	$	1,024	$	—	$	125	$	553	$	17,724	$	3	$	—	$	19,429
Commercial real estate-owner occupied	—		—		—		—		—		—		3		3
Commercial and business lending	1,024		—		125		553		17,724		3		3		19,432
Total commercial	1,024		—		125		553		17,724		3		3		19,432
Residential mortgage	—		—		40		—		—		2		47		89
Auto finance	—		—		767		1,675		158		—		—		2,600
Home equity	93		—		—		—		—		—		15		108
Other consumer	1,688		—		15		8		17		28		34		1,790
Total consumer	1,782		—		822		1,683		175		30		95		4,586
Total gross charge offs	$	2,806	$	—	$	947	$	2,236	$	17,899	$	33	$	98	$	24,018

The following table presents gross charge offs by origination year for the year ended December 31, 2023:

			Gross Charge Offs by Origination Year
($ in thousands)	Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Commercial and industrial	$	4,130	$	717	$	9,594	$	25,270	$	5,958	$	—	$	18	$	45,687
Commercial real estate-owner occupied	—		—		—		—		—		25		—		25
Commercial and business lending	4,130		717		9,594		25,270		5,958		25		18		45,713
Commercial real estate-investor	—		—		—		—		—		—		252		252
Real estate construction	—		—		—		—		—		—		25		25
Commercial real estate lending	—		—		—		—		—		—		277		277
Total commercial	4,130		717		9,594		25,270		5,958		25		295		45,989
Residential mortgage	—		2		32		42		148		5		723		952
Auto finance	—		795		4,524		626		—		5		—		5,950
Home equity	53		21		3		31		—		22		294		424
Other consumer	4,884		—		72		124		131		72		170		5,453
Total consumer	4,937		818		4,630		823		279		105		1,187		12,779
Total gross charge offs	$	9,068	$	1,535	$	14,224	$	26,093	$	6,237	$	130	$	1,482	$	58,768

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 warrant specific attention from management. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit. 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 net worth and paying capacity of the obligor or the collateral pledged. These loans generally 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. Management has determined commercial loan relationships in nonaccrual status, and commercial and consumer loan relationships with their terms restructured in a loan modification, meet the criteria to be individually evaluated. 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.

24

The following table presents loans by past due status at March 31, 2024:

	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	$	9,785,140	$	371	$	150	$	426	$	72,243	$	9,858,329
Commercial real estate - owner occupied	1,093,804		—		—		—		2,090		1,095,894
Commercial and business lending	10,878,944		371		150		426		74,333		10,954,223
Commercial real estate - investor	4,997,335		—		19,164		—		18,697		5,035,195
Real estate construction	2,285,763		1,260		—		—		18		2,287,041
Commercial real estate lending	7,283,098		1,260		19,164		—		18,715		7,322,237
Total commercial	18,162,042		1,631		19,314		426		93,047		18,276,460
Residential mortgage	7,788,322		9,808		94		—		69,954		7,868,180
Auto finance	2,451,552		10,373		2,148		26		7,158		2,471,257
Home equity	608,821		2,506		312		24		8,100		619,764
Other consumer	254,313		1,298		963		1,942		87		258,603
Total consumer	11,103,009		23,985		3,517		1,992		85,299		11,217,802
Total loans	$	29,265,051	$	25,617	$	22,831	$	2,417	$	178,346	$	29,494,263

(a) Of the total nonaccrual loans, $98 million, or 55%, were current with respect to payment at March 31, 2024.

(b) No interest income was recognized on nonaccrual loans for the three months ended March 31, 2024. In addition, there were $20 million of nonaccrual loans for which there was no related ACLL at March 31, 2024.

The following table presents loans by past due status at December 31, 2023:

	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	$	9,663,587	$	5,374	$	191	$	380	$	62,022	$	9,731,555
Commercial real estate - owner occupied	1,059,948		—		358		—		1,394		1,061,700
Commercial and business lending	10,723,536		5,374		549		380		63,416		10,793,255
Commercial real estate - investor	5,086,117		—		18,697		19,432		—		5,124,245
Real estate construction	2,271,392		—		—		—		6		2,271,398
Commercial real estate lending	7,357,509		—		18,697		19,432		6		7,395,644
Total commercial	18,081,044		5,374		19,246		19,812		63,422		18,188,898
Residential mortgage	7,780,304		13,294		152		—		71,142		7,864,891
Auto finance	2,232,906		14,712		2,674		73		5,797		2,256,162
Home equity	615,810		3,500		708		—		8,508		628,526
Other consumer	273,644		1,233		932		1,803		128		277,740
Total consumer	10,902,664		32,739		4,467		1,876		85,574		11,027,319
Total loans	$	28,983,708	$	38,113	$	23,712	$	21,689	$	148,997	$	29,216,218

(a) Of the total nonaccrual loans, $80 million, or 53%, were current with respect to payment at December 31, 2023.

(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2023. In addition, there were $23 million of nonaccrual loans for which there was no related ACLL at December 31, 2023.

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 during the three months ended March 31, 2024 and March 31, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at March 31, 2024.

	Interest Rate Concession
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Commercial and industrial	$	159	$	47
Auto	46		61
Home equity	—		31
Other consumer	534		498
Total loans modified	$	739	$	637

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	Term Extension
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Residential mortgage	$	—	$	209
Total loans modified	$	—	$	209

	Combination - Interest Rate Concession and Term Extension
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Residential mortgage	$	643	$	165
Home equity	31		93
Total loans modified	$	674	$	258

The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans as of March 31, 2024 and March 31, 2023:

	Interest Rate Concession
	Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
Loan Type	March 31, 2024		March 31, 2023
Commercial and industrial	(16)	%	(16)	%
Residential mortgage	3	%	—	%
Auto	(9)	%	(2)	%
Home equity	(3)	%	1	%
Other consumer	(21)	%	(20)	%
Weighted average of total loans modified	(9)	%	(17)	%

(a) Due to market conditions, some interest rate concessions on floating rate loans may involve an increase in rate that was lower in comparison to the rate of increase for floating rate loans not modified.

	Term Extension
	Financial Effect, Weighted Average Term Increase(a)
Loan Type	March 31, 2024	March 31, 2023
Residential mortgage	158 months	26 months
Home equity	64 months	0 months
Weighted average of total loans modified	153 months	26 months

(a) During the three months ended March 31, 2024 and March 31, 2023, term extensions changed the weighted average term on modified loans from 254 to 407 months and 334 to 360 months, 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 March 31, 2024:

	Payment Status (Amortized Cost Basis)
($ in thousands)	Current		30-89 Days Past Due		90+ Days Past Due		Nonaccrual
Commercial and industrial	$	377	$	—	$	—	$	—
Residential mortgage	345		—		—		991
Auto	63		3		—		11
Home equity	135		47		—		139
Other consumer	1,487		—		—		—
Total loans modified	$	2,407	$	50	$	—	$	1,141

The following table depicts the performance of loans that have been modified in the three months ended March 31, 2023:

	Payment Status (Amortized Cost Basis)
($ in thousands)	Current		30-89 Days Past Due		90+ Days Past Due		Nonaccrual
Commercial and industrial	$	47	$	—	$	—	$	—
Residential mortgage	126		—		—		248
Auto	61		—		—		—
Home equity	31		—		—		93
Other consumer	498		—		—		—
Total loans modified	$	763	$	—	$	—	$	341

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The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous twelve months and subsequently had a payment default during the three months ended March 31, 2024:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
($ in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Auto	$	11	$	—	$	—
Total loans modified	$	11	$	—	$	—

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous three months and subsequently had a payment default during the three months ended March 31, 2023:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
($ in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Home equity	$	—	$	—	$	60
Total loans modified	$	—	$	—	$	60

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 March 31, 2024 was the Moody's baseline scenario from February 2024, which was reviewed against the March 2024 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 11 for additional information on the change in the allowance for unfunded commitments.

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The following table presents a summary of the changes in the ACLL by portfolio segment for the three months ended March 31, 2024:

($ in thousands)	Dec 31, 2023		Charge offs		Recoveries		Net Charge offs		Provision for credit losses		Mar 31, 2024		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	128,263	$	(19,429)	$	791	$	(18,638)	$	23,202	$	132,826
Commercial real estate — owner occupied	10,610		(3)		5		2		1,768		12,381
Commercial and business lending	138,873		(19,432)		796		(18,636)		24,970		145,207
Commercial real estate — investor	67,858		—		—		—		4,137		71,995
Real estate construction	53,554		—		30		30		(4,281)		49,303
Commercial real estate lending	121,412		—		30		30		(144)		121,298
Total commercial	260,285		(19,432)		826		(18,606)		24,826		266,506
Residential mortgage	37,808		(89)		27		(62)		(1,831)		35,915
Auto finance	24,961		(2,600)		506		(2,094)		3,248		26,114
Home equity	15,403		(108)		319		211		(874)		14,740
Other consumer	12,638		(1,790)		252		(1,537)		1,630		12,731
Total consumer	90,809		(4,586)		1,104		(3,482)		2,174		89,501
Total loans	$	351,094	$	(24,018)	$	1,930	$	(22,088)	$	27,000	$	356,006
Allowance for unfunded commitments
Commercial and industrial	$	13,319	$	—	$	—	$	—	$	(757)	$	12,562
Commercial real estate — owner occupied	149		—		—		—		15		164
Commercial and business lending	13,468		—		—		—		(742)		12,725
Commercial real estate — investor	480		—		—		—		37		517
Real estate construction	17,024		—		—		—		(2,103)		14,921
Commercial real estate lending	17,504		—		—		—		(2,066)		15,438
Total commercial	30,972		—		—		—		(2,808)		28,164
Home equity	2,629		—		—		—		(316)		2,313
Other consumer	1,174		—		—		—		124		1,298
Total consumer	3,803		—		—		—		(192)		3,612
Total loans	$	34,776	$	—	$	—	$	—	$	(3,000)	$	31,776
Allowance for credit losses on loans
Commercial and industrial	$	141,582	$	(19,429)	$	791	$	(18,638)	$	22,445	$	145,388	1.47	%
Commercial real estate — owner occupied	10,759		(3)		5		2		1,783		12,544		1.14	%
Commercial and business lending	152,341		(19,432)		796		(18,636)		24,227		157,933		1.44	%
Commercial real estate — investor	68,338		—		—		—		4,174		72,512		1.44	%
Real estate construction	70,578		—		30		30		(6,383)		64,225		2.81	%
Commercial real estate lending	138,916		—		30		30		(2,209)		136,737		1.87	%
Total commercial	291,257		(19,432)		826		(18,606)		22,018		294,669		1.61	%
Residential mortgage	37,808		(89)		27		(62)		(1,831)		35,915		0.46	%
Auto finance	24,961		(2,600)		506		(2,094)		3,248		26,114		1.06	%
Home equity	18,032		(108)		319		211		(1,190)		17,054		2.75	%
Other consumer	13,812		(1,790)		252		(1,537)		1,755		14,029		5.43	%
Total consumer	94,613		(4,586)		1,104		(3,482)		1,982		93,112		0.83	%
Total loans	$	385,870	$	(24,018)	$	1,930	$	(22,088)	$	24,000	$	387,782	1.31	%

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The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2023:

($ in thousands)	Dec 31, 2022		Charge offs		Recoveries		Net Charge offs		Provision for credit losses		Dec 31, 2023		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	119,076	$	(45,687)	$	3,015	$	(42,672)	$	51,859	$	128,263
Commercial real estate — owner occupied	9,475		(25)		11		(15)		1,150		10,610
Commercial and business lending	128,551		(45,713)		3,026		(42,687)		53,009		138,873
Commercial real estate — investor	54,398		(252)		3,016		2,763		10,697		67,858
Real estate construction	45,589		(25)		80		55		7,910		53,554
Commercial real estate lending	99,986		(277)		3,095		2,819		18,607		121,412
Total commercial	228,538		(45,989)		6,121		(39,868)		71,616		260,285
Residential mortgage	38,298		(952)		541		(411)		(79)		37,808
Auto finance	19,619		(5,950)		1,241		(4,709)		10,051		24,961
Home equity	14,875		(424)		1,262		837		(310)		15,403
Other consumer	11,390		(5,453)		978		(4,475)		5,723		12,638
Total consumer	84,182		(12,779)		4,021		(8,758)		15,384		90,809
Total loans	$	312,720	$	(58,768)	$	10,142	$	(48,626)	$	87,000	$	351,094
Allowance for unfunded commitments
Commercial and industrial	$	12,997	$	—	$	—	$	—	$	321	$	13,319
Commercial real estate — owner occupied	103		—		—		—		46		149
Commercial and business lending	13,101		—		—		—		367		13,468
Commercial real estate — investor	710		—		—		—		(230)		480
Real estate construction	20,583		—		—		—		(3,558)		17,024
Commercial real estate lending	21,292		—		—		—		(3,788)		17,504
Total commercial	34,393		—		—		—		(3,421)		30,972
Home equity	2,699		—		—		—		(70)		2,629
Other consumer	1,683		—		—		—		(509)		1,174
Total consumer	4,382		—		—		—		(579)		3,803
Total loans	$	38,776	$	—	$	—	$	—	$	(4,000)	$	34,776
Allowance for credit losses on loans
Commercial and industrial	$	132,073	$	(45,687)	$	3,015	$	(42,672)	$	52,181	$	141,582	1.45	%
Commercial real estate — owner occupied	9,579		(25)		11		(15)		1,195		10,759		1.01	%
Commercial and business lending	141,652		(45,713)		3,026		(42,687)		53,376		152,341		1.41	%
Commercial real estate — investor	55,108		(252)		3,016		2,763		10,467		68,338		1.33	%
Real estate construction	66,171		(25)		80		55		4,351		70,578		3.11	%
Commercial real estate lending	121,279		(277)		3,095		2,819		14,819		138,916		1.88	%
Total commercial	262,931		(45,989)		6,121		(39,868)		68,195		291,257		1.60	%
Residential mortgage	38,298		(952)		541		(411)		(79)		37,808		0.48	%
Auto finance	19,619		(5,950)		1,241		(4,709)		10,051		24,961		1.11	%
Home equity	17,574		(424)		1,262		837		(380)		18,032		2.87	%
Other consumer	13,073		(5,453)		978		(4,475)		5,214		13,812		4.97	%
Total consumer	88,565		(12,779)		4,021		(8,758)		14,805		94,613		0.86	%
Total loans	$	351,496	$	(58,768)	$	10,142	$	(48,626)	$	83,000	$	385,870	1.32	%

Note 7 Goodwill and Other Intangible Assets

Goodwill

Goodwill is not amortized but is instead subject to impairment tests on at least an annual basis, and more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

The Corporation conducted its most recent annual impairment testing in May 2023, utilizing a qualitative assessment. Factors that management considered in this assessment included macroeconomic conditions, industry and market considerations, overall financial performance of the Corporation and each reporting unit (both current and projected), changes in management strategy, and changes in the composition or carrying amount of net assets. In addition, management considered the changes in both the Corporation's common stock price and in the KBW Nasdaq Regional Banking Index (KRX), as well as the Corporation's earnings per common share trend over the past year. Based on these assessments, management concluded that it is

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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 2023 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in 2023 or the first three months of 2024.

The Corporation had goodwill of $1.1 billion at both March 31, 2024 and December 31, 2023.

Core Deposit Intangibles

The Corporation has CDIs which are amortized. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:

($ in thousands)	Three Months Ended March 31, 2024		Year Ended Dec 31, 2023
Core deposit intangibles
Gross carrying amount at the beginning of period	$	88,109	$	88,109
Accumulated amortization	(49,841)		(47,638)
Net book value	$	38,268	$	40,471
Amortization during the period	$	2,203	$	8,811

Mortgage Servicing Rights

The Corporation sells residential mortgage loans in the secondary market and typically retains the right to service the loans sold. MSRs are not traded in active markets. As a result, a cash flow model is used to determine fair value. Key assumptions and estimates, including projected prepayment speeds, assumed servicing costs, ancillary income, costs to service delinquent loans, costs of foreclosure, and discount rates with option-adjusted spreads, are used in measuring the fair value of the MSRs asset. These assumptions are considered significant unobservable inputs. See Note 11 for a discussion of the recourse provisions on sold residential mortgage loans. See Note 12 which further discusses fair value measurement relative to the MSRs asset.

A summary of changes in the balance of the MSRs asset under the fair value measurement method for the three months ended March 31, 2024 and the year ended December 31, 2023 is as follows:

($ in thousands)	Three Months Ended March 31, 2024			Year Ended Dec 31, 2023
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$	84,390		$	77,351
Additions	877			3,564
Paydowns	(1,687)			(7,185)
Valuation:
Change in fair value model assumptions	—			8,881
Changes in fair value of asset	1,646			1,778
Mortgage servicing rights at end of period	$	85,226		$	84,390
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)(a)	$	6,349,049		$	7,364,492
Mortgage servicing rights to servicing portfolio(a)	1.34		%	1.15		%

(a) During the fourth quarter of 2023, the Corporation transferred $969 million of residential mortgages into held for sale and subsequently sold them for $844 million. After sale, the servicing was retained for a short period until full servicing was transferred to the purchaser in January 2024.

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 March 31, 2024. 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 amortization expense for CDIs and decay for MSRs:

($ in thousands)	Core Deposit Intangibles		Mortgage Servicing Rights
Nine months ended December 31, 2024	$	6,608	$	6,930
2025	8,811		11,133
2026	8,811		11,013
2027	8,811		10,506
2028	3,485		9,628
2029	1,681		8,614
Beyond 2029	61		27,402
Total estimated amortization expense and MSRs decay	$	38,268	$	85,226

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Note 8 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)	Mar 31, 2024		Dec 31, 2023
Short-term funding
Federal funds purchased	$	175,135	$	220,160
Securities sold under agreements to repurchase	90,536		106,620
Federal funds purchased and securities sold under agreements to repurchase	265,671		326,780
BTFP funding	500,000		—
Total short-term funding	$	765,671	$	326,780
Long-term funding
Corporation subordinated notes, at par	$	550,000	$	550,000
Discount and capitalized costs	(7,468)		(7,748)
Subordinated debt fair value hedge(a)	(6,838)		(1,366)
Finance leases	361		383
Total long-term funding	$	536,055	$	541,269
Total short and long-term funding, excluding FHLB advances	$	1,301,726	$	868,049
FHLB advances
Short-term FHLB advances	$	138,000	$	740,000
Long-term FHLB advances	1,209,862		1,209,907
FHLB advances fair value hedge(a)	(14,451)		(9,713)
Total FHLB advances	$	1,333,411	$	1,940,194
Total short and long-term funding	$	2,635,137	$	2,808,243

(a) For additional information on the fair value hedges, see Note 9.

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 March 31, 2024, the Corporation had pledged securities valued at 215% 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 as of March 31, 2024 and December 31, 2023 are presented in the following table:

	Overnight and Continuous
($ in thousands)	Mar 31, 2024		Dec 31, 2023
Repurchase agreements
Agency mortgage-related securities	$	90,536	$	106,620

Long-Term Funding

Subordinated Notes 

In November 2014, the Corporation issued $250 million of 10-year subordinated notes, due January 2025, and callable October 2024. The subordinated notes have a fixed coupon interest rate of 4.25% and were issued at a discount.

In February 2023, the Corporation issued $300 million of 10-year subordinated notes, due March 1, 2033 and redeemable (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). 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.

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Finance Leases

Finance leases are used in conjunction with branch operations. See Note 16 for additional disclosure regarding the Corporation’s leases.

Note 9 Derivative and Hedging Activities

The Corporation is exposed to certain risk arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, foreign currency, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates and/or foreign currency exchange rates. The Corporation's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation's known or expected cash receipts and its known or expected cash payments principally related to the Corporation's assets.

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 $89 million and $93 million of investment securities as collateral at March 31, 2024 and December 31, 2023, respectively. Cash is often pledged as collateral for derivatives that are not centrally cleared. The Corporation had no required cash collateral at March 31, 2024, compared to $5 million at December 31, 2023.

To qualify for hedge accounting, a hedging relationship must be highly effective at mitigating the risk associated with the exposure being hedged. The Corporation performs effectiveness assessments of its derivative financial instruments prospectively at inception and both prospectively and retrospectively quarterly thereafter. The initial prospective assessment is performed on a quantitative basis unless the hedging relationship meets certain conditions, and subsequent assessments are performed on a quantitative basis unless certain conditions are met where a qualitative basis may be used. If it is determined that a derivative financial instrument is not highly effective at hedging the designated exposure, hedge accounting is discontinued.

Federal regulations require the Corporation to clear all compound SOFR interest rate swaps through a clearing house, if possible. For derivatives cleared through central clearing houses, the variation margin payments are legally characterized as daily settlements of the derivative rather than collateral. The Corporation's clearing agent for interest rate derivative contracts that are centrally cleared through the Chicago Mercantile Exchange and the London Clearing House settles the variation margin daily. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting and financial reporting purposes. Depending on the net position, the fair value is reported in other assets or accrued expenses and other liabilities on the consolidated balance sheets. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument.

Fair Value Hedges of Interest Rate Risk

The Corporation is exposed to changes in the fair value of its fixed-rate debt due to changes in benchmark interest rates. The Corporation uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rates. Interest rate swaps designated as fair value hedges involve receiving payment of fixed-rate amounts from a counterparty in exchange for the Corporation paying variable-rate payments over the life of the agreements without the exchange of the underlying notional amount.

For derivatives designated and that qualify as fair value hedges, as allowed under U.S. GAAP, the Corporation applied the "shortcut" method of accounting, which permits the assumption of perfect effectiveness. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest expense. These items, along with the net interest from the derivative, are reported in the same income statement line as the fixed-rate debt expense.

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Fair Value Hedges of Foreign Currency Exchange Rate Risk

The Corporation is exposed to changes in the fair value of its foreign currency denominated loans due to changes in foreign currency exchange rates. The Corporation uses foreign currency exchange forward contracts to manage its exposure to changes in fair value on these foreign currency denominated loans.

To assess effectiveness of the foreign currency exchange forward contracts, the Corporation has elected to utilize the critical terms match method. Under the critical terms match method, if the hedging relationship meets certain criteria, it allows the Corporation to assume that the hedging relationship is perfectly effective, eliminating the quantitative aspect of assessing effectiveness. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in capital markets, net.

Cash Flow Hedges of Interest Rate Risk

The Corporation is exposed to variability in cash flows on its floating rate assets due to changes in benchmark interest rates. The Corporation uses interest rate swaps to hedge certain forecasted transactions for the variability in cash flows attributable to the contractually specified interest rate in order to add stability to net interest income and to manage its exposure to interest rate movements. Interest rate swaps designated as cash flow hedges involve receiving fixed-rate amounts from a counterparty in exchange for the Corporation making variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. These items, along with the net interest from the derivative, are reported in the same income statement line as the interest income from the floating-rate assets.

To assess effectiveness of interest rate swaps, the Corporation performs a quantitative analysis using a period by period regression method. When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income (loss) and are subsequently reclassified to interest income as interest payments are made on such variable rate loans.

Derivatives to Accommodate Customer Needs

The Corporation facilitates customer borrowing activity by entering into various derivative contracts which are designated as free standing derivative contracts. Free standing derivative products are entered into primarily for the benefit of commercial customers seeking to manage their exposures to interest rate risk and foreign currency. These derivative contracts are not designated against specific assets and liabilities on the consolidated balance sheets or forecasted transactions and, therefore, do not qualify for hedge accounting treatment. Such derivative contracts are carried at fair value in other assets and accrued expenses and other liabilities on the consolidated balance sheets with changes in the fair value recorded as a component of capital markets, net, and typically include interest rate-related instruments (swaps and caps) and foreign currency exchange forwards. See Note 10 for additional information and disclosures on balance sheet offsetting.

Interest rate-related and other instruments: The Corporation provides interest rate risk management services to commercial customers, primarily interest rate swaps and caps. The Corporation’s market risk from unfavorable movements in interest rates related to these derivative contracts is generally economically hedged by concurrently entering into offsetting derivative contracts. The offsetting derivative contracts have identical notional values, terms, and indices, except in rare circumstances where the indices are not identical which creates a negligible basis mismatch. The Corporation also enters into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans as either a participant or a lead bank. The risk participation agreements entered into by the Corporation as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution.

Foreign currency exchange forwards: The Corporation provides foreign currency exchange services to customers, primarily forward contracts. The Corporation's customers enter into a foreign currency exchange forward with the Corporation as a means for them to mitigate exchange rate risk. The Corporation mitigates its risk by then entering into an offsetting foreign currency exchange derivative contract.

Mortgage Derivatives

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 values of these commitments are recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net on the consolidated statements of income.

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Interest rate-related instruments for MSRs hedge: The fair value of the Corporation's MSRs asset changes in response to changes in primary mortgage loan rates and other assumptions. To mitigate the earnings volatility caused by changes in the fair value of MSRs, the Corporation designates certain financial instruments as an economic hedge. Changes in the fair value of these instruments are generally expected to partially offset changes in the fair value of MSRs and are recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net on the consolidated statements of income.

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 as of March 31, 2024 and December 31, 2023. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of March 31, 2024 and December 31, 2023. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets.

	Mar 31, 2024								Dec 31, 2023
	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	$	1,350,000	$	2,164	$	1,750,000	$	10,685	$	2,300,000	$	8,075	$	550,000	$	930
Foreign currency exchange forwards	147,695		624		263,335		230		231,566		632		189,212		2,946
Total designated as hedging instruments			2,788				10,915				8,707				3,876
Not designated as hedging instruments:
Interest rate-related and other instruments	3,770,832		113,337		6,262,958		222,303		3,603,513		111,623		6,528,471		195,662
Foreign currency exchange forwards	115,002		5,276		88,602		4,956		87,526		2,954		135,654		2,746
Mortgage banking(a)	49,808		666		98,000		222		29,490		439		51,500		673
Total not designated as hedging instruments			119,279				227,482				115,016				199,082
Gross derivatives before netting			122,067				238,397				123,723				202,958
Less: Legally enforceable master netting agreements			6,463				6,463				18,234				18,234
Less: Cash collateral pledged/received			55,681				—				35,855				—
Total derivative instruments, after netting			$	59,923			$	231,934			$	69,634			$	184,724

(a) The notional amount of the mortgage derivative asset includes interest rate lock commitments, while the notional amount of the mortgage derivative liability includes 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)	March 31, 2024				December 31, 2023
Other long-term funding	$	(543,162)	$	6,838	$	(548,634)	$	1,366
FHLB advances	(585,549)		14,451		(590,287)		9,713
Total	$	(1,128,711)	$	21,289	$	(1,138,921)	$	11,079

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At March 31, 2024 and December 31, 2023, the carrying amount excluded for foreign currency denominated loans was $411 million and $421 million, respectively.

The Corporation terminated its $500 million fair value hedge during the fourth quarter of 2019. At March 31, 2024, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $260 million and is included in loans on the consolidated balance sheets. This amount includes $1 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 for the three months ended March 31, 2024 and 2023:

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value and Cash Flow Hedging Relationships
	Three months ended Mar 31,
	2024				2023
($ in thousands)	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)	$	(4,863)	$	5,322	$	(1,321)	$	2,515
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items	(40)		(10,210)		(59)		10,724
Derivatives designated as hedging instruments(a)	(4,823)		15,532		(1,262)		(8,209)

(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 Mar 31,
	2024		2023
($ in thousands)	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	$	—	$	—
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items	(9,070)		1,802
Derivatives designated as hedging instruments	9,070		(1,802)

The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the three months ended March 31, 2024 and 2023:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivative(a)	$	(19,461)	$	13,763
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)	4,823		1,262

(a) The entirety of gains (losses) recognized in OCI as well as the losses 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 $12 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 March 31, 2024. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 38 months as of March 31, 2024.

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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 for the three months ended March 31, 2024 and 2023:

	Consolidated Statements of Income Category of Gain / (Loss)  Recognized in Income	Three Months Ended Mar 31,
($ in thousands)		2024		2023
Derivative instruments
Interest rate-related and other instruments — customer and mirror, net	Capital markets, net	$	(71)	$	(70)
Interest rate-related instruments — MSRs hedge	Mortgage banking, net	(2,937)		2,521
Foreign currency exchange forwards	Capital markets, net	746		228
Interest rate lock commitments (mortgage)	Mortgage banking, net	227		252
Forward commitments (mortgage)	Mortgage banking, net	451		(395)

Note 10 Balance Sheet Offsetting

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

The Corporation enters into interest rate-related instruments to facilitate the interest rate risk management strategies of commercial customers and foreign exchange forwards to manage customers' exposure to fluctuating foreign exchange rates. The Corporation typically mitigates these risks by entering into equal and offsetting agreements with highly rated third-party financial institutions, though in rare circumstances the agreements are not perfectly equal and offsetting, which creates a negligible basis mismatch. The Corporation is party to master netting arrangements with some of its financial institution counterparties that create single net settlements of all legal claims or obligations to pay or receive the net amount of settlement of the individual interest and foreign exchange agreements. Collateral, usually in the form of investment securities and cash, is posted by the counterparty with net liability positions in accordance with contract thresholds. Derivatives subject to a legally enforceable master netting agreement are reported with assets and liabilities offset resulting in a net position which is further offset by any cash collateral, and is reported in other assets and accrued expenses and other liabilities on the face of the consolidated balance sheets. For disclosure purposes, the net position on the consolidated balance sheets can be further netted down by investment securities collateral received or pledged. See Note 9 for additional information on the Corporation’s derivative and hedging activities.

The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of March 31, 2024 and December 31, 2023. 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 this table:

	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
March 31, 2024	$	102,956	$	(6,463)	$	(55,681)	$	40,812	$	(32,683)	$	8,129
December 31, 2023	87,075		(18,234)		(35,855)		32,985		(32,985)		—
	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
March 31, 2024	$	17,172	$	(6,463)	$	—	$	10,709	$	—	$	10,709
December 31, 2023	18,767		(18,234)		—		533		—		533

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Note 11 Commitments, Off-Balance Sheet Arrangements, Legal Proceedings, and Regulatory Matters

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 9). The following is a summary of lending-related commitments:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)	$	10,828,869	$	11,170,147
Commercial letters of credit(a)	4,580		3,697
Standby letters of credit(c)	230,396		212,029

(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 March 31, 2024 or December 31, 2023.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 9.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2 million at both March 31, 2024 and December 31, 2023, 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)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Allowance for unfunded commitments
Balance at beginning of period	$	34,776	$	38,776
Provision for unfunded commitments	(3,000)		(4,000)
Balance at end of period	$	31,776	$	34,776

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 9. 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, and deferral or elimination of capital gain recognition for tax purposes. The aggregate carrying value of these investments at March 31, 2024 was $215 million, compared to $219 million at December 31, 2023, included in tax credit and other investments on the consolidated balance sheets. The Corporation utilizes the proportional amortization method to account for investments in qualified affordable housing projects.

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 Corporation recognized additional income tax expense attributable to the amortization of investments in qualified affordable housing projects of $9 million for both the three months ended March 31, 2024 and

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March 31, 2023. The Corporation's remaining investment in qualified affordable housing projects accounted for under the proportional amortization method totaled $212 million at March 31, 2024 and $215 million at December 31, 2023.

The Corporation’s unfunded equity 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 equity contributions totaled $31 million at March 31, 2024 and $27 million at December 31, 2023. Additionally, at March 31, 2024, the Corporation also invests in a private SBA loan fund, recorded in equity securities on the consolidated balance sheets, the purpose of which is to identify CRA qualifying loans within a target region, which has a remaining unfunded equity contribution of $3 million.

For the three months ended March 31, 2024 and the year ended December 31, 2023, the Corporation did not record any impairment related to qualified affordable housing investments.

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 offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The Corporation also invests in loan pools that support CRA loans. 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 $40 million at both March 31, 2024 and December 31, 2023, 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.

On at least a quarterly basis, the Corporation assesses its liabilities and contingencies in connection with all pending or threatened claims and litigation, utilizing the most recent information available. On a matter by matter basis, an accrual for loss is established for those matters which the Corporation believes it is probable that a loss may be incurred and that the amount of such loss can be reasonably estimated. Once established, each accrual is adjusted as appropriate to reflect any subsequent developments. Accordingly, management’s estimate will change from time to time, and actual losses may be more or less than the current estimate. For matters where a loss is not probable, or the amount of the loss cannot be estimated, no accrual is established.

Resolution of legal claims is inherently unpredictable, and in many legal proceedings various factors exacerbate this inherent unpredictability, including where the damages sought are unsubstantiated or indeterminate, it is unclear whether a case brought as a class action will be allowed to proceed on that basis, discovery is not complete, the proceeding is not yet in its final stages, the matters present legal uncertainties, there are significant facts in dispute, there are a large number of parties (including where it is uncertain how liability, if any, will be shared among multiple defendants), or there is a wide range of potential results.

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.

Regulatory Matters

A variety of consumer products, including mortgage and deposit products, and certain fees and charges related to such products, have come under increased regulatory scrutiny. It is possible that regulatory authorities could bring enforcement actions, including civil money penalties, or take other actions against the Corporation in regard to these consumer products. The Bank could also determine of its own accord, or be required by regulators, to refund or otherwise make remediation payments to customers in connection with these products, fees and charges. It is not possible at this time for management to assess the probability of a material adverse outcome or reasonably estimate the amount of any potential loss related to such matters.

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In recent consent orders with financial institutions, the CFPB has asserted that certain overdraft charges constitute “unfair and abusive acts and practices.” In certain instances, these financial institutions have agreed to make restitution to customers and to pay civil money penalties. Included in the practices that the CFPB has asserted are “unfair and abusive” are 1) overdraft fees on transactions that had a sufficient balance at the time authorized but then later settled with an insufficient balance (“APSN Fees”), and 2) repeat insufficient funds fees on transactions resubmitted for payment after they were initially declined (“Representment Fees”). In light of these orders, the Corporation has undertaken a review of its current and past practices regarding APSN Fees and Representment Fees. Such review could result in changes to our overdraft fee policies, which would reduce our fee income in future periods and which could also result in a decision to make remediation payments to current and past customers who incurred such fees. The Corporation’s financial results may be materially impacted in any period in which the Corporation determines to make any such remediation payments. In addition to the review described above, the Corporation received an arbitration request in July 2023 which, among other things, sought to recover APSN Fees and Representment Fees on behalf of approximately 1,400 current and former deposit customers of the Corporation (the “arbitration request”). After mediation of the arbitration request, a settlement of up to $2.1 million including attorneys' fees was concluded in February 2024.

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 $1 million and $5 million for the three months ended March 31, 2024 and the year ended December 31, 2023, respectively. There were no loss reimbursement and settlement claims paid in the three months ended March 31, 2024 or for the year ended December 31, 2023. Make whole requests since January 1, 2023 generally arose from loans originated since January 1, 2021 with such balances totaling $3.9 billion at the time of sale, consisting primarily of loans sold to GSEs. As of March 31, 2024, $3.3 billion of those loans originated since January 1, 2021 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 approximately $704,000 at March 31, 2024 and $835,000 at December 31, 2023.

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 both March 31, 2024 and December 31, 2023, there were $15 million 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. The Corporation resumed selling loans to the FHLB with such credit risk retention in February 2024, but prior to that, had not sold any loans with this credit risk retention since February 2005. At March 31, 2024 and December 31, 2023, there were $37 million and $16 million, respectively, of such residential mortgage loans with credit risk recourse, upon which there have been immaterial historical losses to the Corporation.

Note 12 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 2023 Annual Report on Form 10-K.

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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 as of March 31, 2024 and December 31, 2023, aggregated by the level in the fair value hierarchy within which those measurements fall:

	Mar 31, 2024
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	429,859	$	429,859	$	429,859	$	—	$	—
Interest-bearing deposits in other financial institutions	420,114		420,114		420,114		—		—
Federal funds sold and securities purchased under agreements to resell	1,610		1,610		1,610		—		—
AFS investment securities:
U.S. Treasury securities	35,558		35,558		35,558		—		—
Obligations of state and political subdivisions (municipal securities)	80,830		80,830		—		80,830		—
Residential mortgage-related securities:
FNMA / FHLMC	1,090,998		1,090,998		—		1,090,998		—
GNMA	2,214,513		2,214,513		—		2,214,513		—
Commercial mortgage-related securities:
FNMA / FHLMC	17,008		17,008		—		17,008		—
GNMA	152,232		152,232		—		152,232		—
Asset backed securities:
FFELP	129,154		129,154		—		129,154		—
SBA	890		890		—		890		—
Other debt securities	2,965		2,965		—		2,965		—
Total AFS investment securities	3,724,148		3,724,148		35,558		3,688,590		—
HTM investment securities:
U.S. Treasury securities	999		969		969		—		—
Obligations of state and political subdivisions (municipal securities), net	1,676,199		1,523,658		—		1,523,658		—
Residential mortgage-related securities:
FNMA / FHLMC	930,148		771,944		—		771,944		—
GNMA	48,043		44,457		—		44,457		—
Private-label	341,153		281,069		—		281,069		—
Commercial mortgage-related securities:
FNMA / FHLMC	779,310		628,928		—		628,928		—
GNMA	57,114		50,183		—		50,183		—
Total HTM investment securities, net	3,832,967		3,301,209		969		3,300,239		—
Equity securities:
Equity securities	7,071		7,071		6,966		—		105
Equity securities at NAV	12,500		12,500
Total equity securities	19,571		19,571
FHLB and Federal Reserve Bank stocks	173,968		173,968		—		173,968		—
Residential loans held for sale	52,414		52,414		—		52,414		—
Loans, net	29,138,257		27,739,448		—		—		27,739,448
Bank and corporate owned life insurance	685,089		685,089		—		685,089		—
Mortgage servicing rights, net	85,226		85,226		—		—		85,226
Interest rate-related instruments designated as hedging instruments(a)	2,164		2,164		—		2,164		—
Foreign currency exchange forwards designated as hedging instruments(a)	624		624		—		624		—
Interest rate-related and other instruments not designated as hedging instruments(a)	113,337		113,337		—		113,337		—
Foreign currency exchange forwards not designated as hedging instruments(a)	5,276		5,276		—		5,276		—
Interest rate lock commitments to originate residential mortgage loans held for sale	666		666		—		—		666
Total selected assets at fair value	$	38,685,290	$	36,754,723	$	895,077	$	8,021,701	$	27,825,445

(a) Figures are presented gross before netting. See Note 9 and Note 10 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.

40

	Mar 31, 2024
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Noninterest-bearing demand	$	6,254,135	$	6,254,135	$	—	$	—	$	6,254,135
Savings	5,124,639		5,124,639		—		—		5,124,639
Interest-bearing demand	8,747,127		8,747,127		—		—		8,747,127
Money market	6,721,674		6,721,674		—		—		6,721,674
Brokered CDs(a)	3,931,230		3,931,230		—		3,931,230		—
Other time deposits(a)	2,934,352		2,934,352		—		2,934,352		—
Total deposits	33,713,158		33,713,158		—		6,865,582		26,847,575
Short-term funding:
Federal funds purchased and securities sold under agreements to repurchase	265,671		265,661		—		265,661		—
BTFP funding	500,000		497,959		—		497,959		—
Total short-term funding	765,671		763,620		—		763,620		—
FHLB advances	1,333,411		1,320,280		—		1,320,280		—
Other long-term funding	536,055		517,009		—		517,009		—
Standby letters of credit(b)	2,347		2,347		—		2,347		—
Interest rate-related instruments designated as hedging instruments(c)	10,685		10,685		—		10,685		—
Foreign currency exchange forwards designated as hedging instruments(c)	230		230		—		230		—
Interest rate-related and other instruments not designated as hedging instruments(c)	222,303		222,303		—		222,303		—
Foreign currency exchange forwards not designated as hedging instruments(c)	4,956		4,956		—		4,956		—
Forward commitments to sell residential mortgage loans	222		222		—		—		222
Total selected liabilities at fair value	$	36,589,039	$	36,554,811	$	—	$	9,707,013	$	26,847,797

(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.
(b) The commitment on standby letters of credit was $230 million at March 31, 2024. See Note 11 for additional information on the standby letters of credit and for information on    the fair value of lending-related commitments.
(c) Figures are presented gross before netting. See Note 9 and Note 10 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.

41

	Dec 31, 2023
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	484,384	$	484,384	$	484,384	$	—	$	—
Interest-bearing deposits in other financial institutions	425,089		425,089		425,089		—		—
Federal funds sold and securities purchased under agreements to resell	14,350		14,350		14,350		—		—
AFS investment securities:
U.S. Treasury securities	35,902		35,902		35,902		—		—
Obligations of state and political subdivisions (municipal securities)	91,817		91,817		—		91,817		—
Residential mortgage-related securities:
FNMA / FHLMC	1,120,794		1,120,794		—		1,120,794		—
GNMA	2,042,675		2,042,675		—		2,042,675		—
Commercial mortgage-related securities:
FNMA / FHLMC	16,937		16,937		—		16,937		—
GNMA	154,793		154,793		—		154,793		—
Asset backed securities:
FFELP	133,975		133,975		—		133,975		—
SBA	1,051		1,051		—		1,051		—
Other debt securities	2,950		2,950		—		2,950		—
Total AFS investment securities	3,600,892		3,600,892		35,902		3,564,990		—
HTM investment securities:
U.S. Treasury securities	999		963		963		—		—
Obligations of state and political subdivisions (municipal securities), net	1,682,398		1,553,984		—		1,553,984		—
Residential mortgage-related securities:
FNMA / FHLMC	941,973		804,393		—		804,393		—
GNMA	48,979		46,170		—		46,170		—
Private-label	345,083		289,507		—		289,507		—
Commercial mortgage-related securities:
FNMA / FHLMC	780,995		632,914		—		632,914		—
GNMA	59,733		52,619		—		52,619		—
Total HTM investment securities, net	3,860,160		3,380,550		963		3,379,586		—
Equity securities:
Equity securities	31,651		31,651		6,883		—		24,769
Equity securities at NAV	10,000		10,000
Total equity securities	41,651		41,651
FHLB and Federal Reserve Bank stocks	229,171		229,171		—		229,171		—
Residential loans held for sale	33,011		33,011		—		33,011		—
Commercial loans held for sale	90,303		90,303		—		90,303		—
Loans, net	28,865,124		27,371,086		—		—		27,371,086
Bank and corporate owned life insurance	682,649		682,649		—		682,649		—
Mortgage servicing rights, net	84,390		84,390		—		—		84,390
Interest rate-related instruments designated as hedging instruments(a)	8,075		8,075		—		8,075		—
Foreign currency exchange forwards designated as hedging instruments(a)	632		632		—		632		—
Interest rate-related and other instruments not designated as hedging instruments(a)	111,623		111,623		—		111,623		—
Foreign currency exchange forwards not designated as hedging instruments(a)	2,954		2,954		—		2,954		—
Interest rate lock commitments to originate residential mortgage loans held for sale	439		439		—		—		439
Total selected assets at fair value	$	38,534,897	$	36,561,249	$	967,570	$	8,102,995	$	27,480,684

(a) Figures are presented gross before netting. See Note 9 and Note 10 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.

42

	Dec 31, 2023
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Noninterest-bearing demand	$	6,119,956	$	6,119,956	$	—	$	—	$	6,119,956
Savings	4,835,701		4,835,701		—		—		4,835,701
Interest-bearing demand	8,843,967		8,843,967		—		—		8,843,967
Money market	6,330,453		6,330,453		—		—		6,330,453
Brokered CDs(a)	4,447,479		4,447,479		—		4,447,479		—
Other time deposits(a)	2,868,494		2,868,494		—		2,868,494		—
Total deposits	33,446,049		33,446,049		—		7,315,973		26,130,076
Federal funds purchased and securities sold under agreements to repurchase	326,780		326,757		—		326,757		—
FHLB advances	1,940,194		1,944,600		—		1,944,600		—
Other long-term funding	541,269		534,983		—		534,983		—
Standby letters of credit(b)	2,157		2,157		—		2,157		—
Interest rate-related instruments designated as hedging instruments(c)	930		930		—		930		—
Foreign currency exchange forwards designated as hedging instruments(c)	2,946		2,946		—		2,946		—
Interest rate-related and other instruments not designated as hedging instruments(c)	195,662		195,662		—		195,662		—
Foreign currency exchange forwards not designated as hedging instruments(c)	2,746		2,746		—		2,746		—
Forward commitments to sell residential mortgage loans	673		673		—		—		673
Total selected liabilities at fair value	$	36,459,407	$	36,457,504	$	—	$	10,326,755	$	26,130,749

(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.

(b) The commitment on standby letters of credit was $212 million at December 31, 2023. See Note 11 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

(c) Figures are presented gross before netting. See Note 9 and Note 10 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 three months ended March 31, 2024 and the year ended December 31, 2023, for the Corporation's mortgage derivatives measured 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		Total
Balance December 31, 2022	$	86	$	46	$	40
New production	6,557		(1,816)		8,373
Closed loans / settlements	(4,171)		2,494		(6,665)
Other	(2,033)		(51)		(1,982)
Change in mortgage derivative	352		627		(274)
Balance December 31, 2023	$	439	$	673	$	(234)
New production	$	1,820	$	(590)	$	2,409
Closed loans / settlements	(1,546)		188		(1,734)
Other	(46)		(49)		3
Change in mortgage derivative	227		(451)		678
Balance March 31, 2024	$	666	$	222	$	444

The following table presents a rollforward of the fair value of Level 3 equity securities, for the three months ended March 31, 2024 and the year ended December 31, 2023, 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, 2022	$	19,225
Gains recognized in investment securities gains, net	5,861
Purchases	11
Sales	(329)
Fair value as of December 31, 2023	$	24,769
Gains recognized in investment securities gains, net	$	4,054
Purchases	8
Sales	(28,725)
Fair value as of March 31, 2024	$	105

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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:

($ in thousands)	Fair Value Hierarchy	Fair Value		Consolidated Statements of Income Category of Adjustment Recognized in Income	Adjustment Recognized on the Consolidated Statements of Income(a)
March 31, 2024
Assets
Individually evaluated loans	Level 3	$	67,625	Provision for credit losses	$	22,305
OREO(b)	Level 2	102		Other noninterest expense / provision for credit losses(c)	21
December 31, 2023
Assets
Individually evaluated loans	Level 3	$	47,221	Provision for credit losses	$	45,709
OREO(b)	Level 2	3,139		Other noninterest expense / provision for credit losses(c)	2,532
Equity securities without readily determinable fair values	Level 3	24,671		Investment securities gains (losses), net	5,785

(a) Includes the YTD impact on the consolidated statements of income.

(b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value and is therefore not included in the table.

(c) When a property's value is written down at the time it is transferred to OREO, the charge off is booked to the provision for credit losses. When a property is already in OREO and subsequently written down, the charge off is booked to other noninterest expense.

Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a nonrecurring basis include the fair value analysis in the goodwill impairment test as well as intangible assets and other nonfinancial long-lived assets measured at fair value for the purpose of impairment assessment.

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

March 31, 2024	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%	6%
Individually evaluated loans	Appraisals / Discounted cash flow	Collateral / Discount factor	11%	-	56%	52%
Interest rate lock commitments to originate residential mortgage loans held for sale	Discounted cash flow	Closing Ratio	25%	-	100%	86%

Note 13 Retirement Plans

The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet the eligibility requirements. The benefits are based primarily on years of service and the employee’s eligible compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Retirement plans of acquired entities are typically merged into the RAP depending on the terms of the merger agreement, and, as applicable, credit is usually applied to employees for years of service at the acquired institution for vesting and eligibility purposes.

The Corporation also provides 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.

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The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three months ended March 31, 2024 and 2023 were as follows:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
RAP
Service cost	$	874	$	796
Interest cost	2,719		2,686
Expected return on plan assets	(8,650)		(8,202)
Amortization of prior service cost	(53)		(63)
Amortization of actuarial loss	—		37
Total net periodic pension cost	$	(5,111)	$	(4,746)
Postretirement Plan
Interest cost	$	18	$	20
Amortization of prior service cost	(19)		(19)
Amortization of actuarial (gain)	(7)		(7)
Total net periodic benefit cost	$	(8)	$	(7)

The components of net periodic pension cost and net periodic benefit cost, other than the service cost component, are included in the line item other of noninterest expense on the consolidated statements of income. The service cost components are included in personnel on 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 2023 or the three months ended March 31, 2024.

Note 14 Segment Reporting

The Corporation utilizes a risk-based internal profitability measurement system to provide strategic business unit reporting. The profitability measurement system is based on internal management methodologies designed to produce consistent results and reflect the underlying economics of the units. Certain strategic business units have been combined for segment information reporting purposes 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. The financial information of the Corporation’s segments has been compiled utilizing the accounting policies described in the Corporation’s 2023 Annual Report on Form 10-K, with certain exceptions. The more significant of these exceptions are described herein.

The reportable segment results are presented based on the Corporation's internal management accounting process. 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, reported segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in previously reported segment financial data. Additionally, the information presented is not indicative of how the segments would perform if they operated as independent entities.

To determine financial performance of each segment, the Corporation allocates FTP assignments, the provision for credit losses, certain noninterest expenses, income taxes, and equity to each 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 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 maturity, prepayment and/or re-pricing characteristics of the assets and liabilities. The net effect of this allocation is offset in the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's net interest income. The net FTP 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 the methodologies described in the Corporation’s 2023 Annual Report on Form 10-K. The net effect of the credit provision is recorded in Risk Management and Shared Services. Indirect

45

expenses incurred by certain centralized support areas are allocated to segments based on actual usage (for example, volume measurements) and other criteria. Certain types of administrative expense and bank-wide expense accruals (including, when applicable, amortization of CDIs and other intangible assets associated with acquisitions, acquisition-related costs, and asset gains on disposed business units) are generally not allocated to segments. Income taxes are 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. Equity is allocated to the segments based on regulatory capital requirements and in proportion to an assessment of the inherent risks associated with the business of the segment (including interest, credit and operating risk).

A brief description of each business segment is presented below. A more in-depth discussion of these segments can be found in the Segment Reporting note in the Corporation’s 2023 Annual Report on Form 10-K.

The Corporate and Commercial Specialty segment serves a wide range of customers including larger businesses, developers, not-for-profits, municipalities, and financial institutions by providing lending and deposit solutions as well as the support to deliver, fund, and manage such banking solutions. In addition, this segment provides a variety of investment, fiduciary, and retirement planning products and services to individuals and small to mid-sized businesses. The Community, Consumer, and Business segment serves individuals, as well as small and mid-sized businesses, by providing lending and deposit solutions. The Risk Management and Shared Services segment includes key shared operational functions and also includes residual revenue and expenses, representing the difference between actual amounts incurred and the amounts allocated to operating segments, including interest rate risk residuals (FTP mismatches) and credit risk and provision residuals (long-term credit charge mismatches).

Information about the Corporation’s segments is presented below:

	Corporate and Commercial Specialty
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	242,931	$	219,123
Net intersegment interest (expense)	(93,736)		(80,980)
Segment net interest income	149,195		138,143
Noninterest income	34,422		32,717
Total revenue	183,617		170,860
Provision for credit losses	15,428		13,782
Noninterest expense	66,350		62,119
Income before income taxes	101,839		94,960
Income tax expense	21,081		17,726
Net income	$	80,758	$	77,234
Allocated goodwill	$	525,836	$	525,836

	Community, Consumer, and Business
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	58,192	$	80,284
Net intersegment interest income	130,159		88,079
Segment net interest income	188,351		168,363
Noninterest income	24,494		25,947
Total revenue	212,845		194,310
Provision for credit losses	6,825		6,758
Noninterest expense	110,490		111,735
Income before income taxes	95,530		75,817
Income tax expense	20,062		15,922
Net income	$	75,468	$	59,895
Allocated goodwill	$	579,156	$	579,156

46

	Risk Management and Shared Services
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest (loss)	$	(43,266)	$	(25,397)
Net intersegment (expense)	(36,422)		(7,099)
Segment net interest (loss)	(79,688)		(32,496)
Noninterest income	6,068		3,409
Total revenue	(73,620)		(29,087)
Provision for credit losses	1,747		(2,568)
Noninterest expense	20,817		13,558
(Loss) before income taxes	(96,184)		(40,077)
Income tax (benefit)	(21,127)		(6,307)
Net (loss)	$	(75,058)	$	(33,770)
Allocated goodwill	$	—	$	—

	Consolidated Total
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	257,858	$	274,010
Net intersegment interest income	—		—
Segment net interest income	257,858		274,010
Noninterest income	64,985		62,073
Total revenue	322,842		336,083
Provision for credit losses	24,001		17,971
Noninterest expense	197,657		187,412
Income before income taxes	101,185		130,700
Income tax expense	20,016		27,340
Net income	$	81,169	$	103,360
Allocated goodwill	$	1,104,992	$	1,104,992

47

Note 15 Accumulated Other Comprehensive Income (Loss)

The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2024 and 2023, including changes during the preceding three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):

($ in thousands)	AFS Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2023	$	(148,641)	$	3,080	$	(25,535)	$	(171,096)
Other comprehensive (loss) before reclassifications	(29,889)		—		—		(29,889)
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities losses, net	197		—		—		197
HTM investment securities, net, at amortized cost(a)	2,060		—		—		2,060
Other assets / accrued expenses and other liabilities	—		(19,461)		—		(19,461)
Interest income	—		4,823		—		4,823
Personnel expense	—		—		(72)		(72)
Other expense	—		—		(7)		(7)
Income tax benefit (expense)	6,885		(1,688)		(1,633)		3,564
Net other comprehensive (loss) during period	(20,746)		(16,326)		(1,712)		(38,785)
Balance March 31, 2024	$	(169,388)	$	(13,246)	$	(27,247)	$	(209,881)
Balance December 31, 2022	$	(233,192)	$	3,360	$	(42,968)	$	(272,799)
Other comprehensive income before reclassifications	36,478		—		—		36,478
Amounts reclassified from accumulated other comprehensive income (loss):
HTM investment securities, net, at amortized cost(a)	2,267		—		—		2,267
Other assets / accrued expenses and other liabilities	—		13,763		—		13,763
Interest income	—		1,262		—		1,262
Personnel expense	—		—		(81)		(81)
Other expense	—		—		30		30
Income tax (expense) benefit	(9,892)		(4,694)		79		(14,507)
Net other comprehensive income during period	28,853		10,331		27		39,211
Balance March 31, 2023	$	(204,339)	$	13,691	$	(42,940)	$	(233,588)

(a) Amortization of net unrealized losses on AFS securities transferred to HTM securities.

Note 16 Leases

The Corporation has operating leases for retail and corporate offices, land, and equipment. The Corporation also has a finance lease for retail and corporate offices.

These leases have original terms of 1 year or longer with remaining maturities up to 39 years, some of which include options to extend the lease term. An analysis of the lease options has been completed and any purchase options or optional periods that the Corporation is reasonably likely to extend have been included in the capitalization.

The discount rate used to capitalize the operating leases is the Corporation's FHLB borrowing rate on the date of lease commencement. When determining the rate to discount specific lease obligations, the repayment period and term are considered.

Operating and finance lease costs and cash flows resulting from these leases are presented below:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Operating lease costs	$	1,545	$	1,464
Finance lease costs	23		23
Operating lease cash flows	1,844		1,828
Finance lease cash flows	23		22

48

The right-of-use asset and lease liability by lease classifications on the consolidated balance sheets were as follows:

($ in thousands)	Consolidated Balance Sheets Category	Mar 31, 2024		Dec 31, 2023
Operating lease right-of-use asset	Premises and equipment	$	23,310	$	24,712
Finance lease right-of-use asset	Other assets	347		368
Operating lease liability	Accrued expenses and other liabilities	25,813		27,311
Finance lease liability	Other long-term funding	361		383

The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows:

	Mar 31, 2024					Dec 31, 2023
($ in thousands)	Lease payments		Weighted-average lease term (in years)	Weighted-average discount rate		Lease payments		Weighted-average lease term (in years)	Weighted-average discount rate
Operating leases
Retail and corporate offices	$	24,223	5.61	3.14	%	$	25,729	5.76	3.12	%
Land	3,846		6.87	3.49	%	4,050		6.98	3.48	%
Equipment	408		2.25	4.62	%	408		2.50	4.62	%
Total operating leases	$	28,476	5.73	3.21	%	$	30,187	5.88	3.19	%
Finance leases
Retail and corporate offices	$	370	4.00	1.32	%	$	394	4.25	1.32	%
Total finance leases	$	370	4.00	1.32	%	$	394	4.25	1.32	%

Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows:

($ in thousands)	Operating Leases		Finance Leases		Total Leases
Nine months ended December 31, 2024	$	4,828	$	69	$	4,898
2025	5,629		93		5,721
2026	5,023		93		5,116
2027	4,312		93		4,404
2028	3,428		23		3,451
Beyond 2028	5,257		—		5,257
Total lease payments	$	28,476	$	370	$	28,847
Less: interest	2,663		9		2,673
Present value of lease payments	$	25,813	$	361	$	26,174

As of March 31, 2024 and December 31, 2023, additional operating leases, primarily retail and corporate offices, that had not yet commenced totaled $6 million and $3 million, respectively. The leases that had not yet commenced as of March 31, 2024 will commence between May 2024 and April 2025 with lease terms of 1 year to 11 years.

49

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, 2023, 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 sum due to the use of rounded numbers for disclosure purposes.

Performance Summary

•Average loans of $29.4 billion increased $523 million, or 2%, from the first three months of 2023, driven primarily by increases in auto finance and real estate construction loans, partially offset by a decrease in residential mortgage loans.

•Average deposits of $33.3 billion increased $3.4 billion, or 11%, from the first three months of 2023, driven primarily by increases in brokered CDs and other time deposits, partially offset by decreases in noninterest bearing demand and money market deposits.

•Net interest income of $258 million decreased $16 million, or 6%, from the first three months of 2023, and net interest margin was 2.79% compared to 3.07% for the first three months of 2023. The decreases in net interest income and net interest margin were driven by increases in interest bearing liabilities outpacing the increase in earning assets and higher costs associated with those interest bearing liabilities.

•Provision for credit losses was $24 million, compared to a provision of $18 million for the first three months of 2023, driven by a mix of portfolio loan growth, nominal credit movement, and general macroeconomic trends.

•Noninterest income of $65 million increased $3 million, or 5%, from the first three months of 2023, driven by an increase in investment securities gains (losses), net primarily as a result of the sale of the Corporation's remaining Visa B shares in the first quarter of 2024, as well as higher wealth management fees.

•Noninterest expense of $198 million increased $10 million, or 5%, from the first three months of 2023, primarily driven by an increase in FDIC expense related to the special assessment.

50

Table 1 Summary Results of Operations: Trends

	Three months ended
($ in thousands, except per share data)	Mar 31, 2024			Dec 31, 2023		Sep 30, 2023			Jun 30, 2023			Mar 31, 2023
Net income (loss)	$	81,169		$	(90,806)	$	83,248		$	87,154		$	103,360
Net income (loss) available to common equity	78,294			(93,681)		80,373			84,279			100,485
Earnings (loss) per common share - basic	0.52			(0.63)		0.53			0.56			0.67
Earnings (loss) per common share - diluted	0.52			(0.62)		0.53			0.56			0.66
Effective tax rate	19.78		%	N/M		18.92		%	21.26		%	20.92		%

51

Table 2 Net Interest Income Analysis

	Three Months Ended,
	Mar 31, 2024					Dec 31, 2023					Mar 31, 2023
($ 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(a)(b)(c)
Commercial and business lending	$	10,816,255	$	194,090	7.22%	$	10,820,214	$	193,808	7.11%	$	10,616,026	$	167,174	6.39%
Commercial real estate lending	7,389,962		138,850		7.56%	7,397,809		138,437		7.42%	7,251,193		119,087		6.66%
Total commercial	18,206,217		332,940		7.35%	18,218,024		332,245		7.24%	17,867,219		286,262		6.50%
Residential mortgage	7,896,956		68,787		3.48%	8,691,258		76,035		3.50%	8,584,528		70,711		3.30%
Auto finance	2,373,720		32,603		5.52%	2,138,536		29,221		5.42%	1,490,115		16,458		4.48%
Other retail	892,128		20,661		9.28%	904,618		21,026		9.27%	903,956		18,494		8.23%
Total loans	29,369,022		454,991		6.22%	29,952,435		458,527		6.08%	28,845,818		391,925		5.49%
Investment securities
Taxable	5,517,023		46,727		3.39%	5,344,578		41,809		3.13%	4,912,416		30,142		2.45%
Tax-exempt(a)	2,133,352		18,024		3.38%	2,209,662		19,244		3.48%	2,329,519		20,192		3.47%
Other short-term investments	576,782		8,311		5.80%	767,256		10,418		5.39%	493,061		5,329		4.37%
Investments and other	8,227,158		73,062		3.55%	8,321,495		71,471		3.43%	7,734,996		55,664		2.88%
Total earning assets	37,596,179		$	528,053	5.64%	38,273,931		$	529,998	5.51%	36,580,814		$	447,589	4.94%
Other assets, net	3,173,027					3,056,772					3,026,251
Total assets	$	40,769,206				$	41,330,703				$	39,607,065
Liabilities and stockholders' equity
Interest-bearing liabilities
Interest-bearing deposits
Savings	$	4,928,031	$	21,747	1.77%	$	4,861,913	$	20,334	1.66%	$	4,664,624	$	9,859	0.86%
Interest-bearing demand	7,490,119		49,990		2.68%	7,156,151		47,277		2.62%	6,814,487		29,918		1.78%
Money market	6,116,604		47,306		3.11%	6,121,105		47,110		3.05%	7,536,393		41,637		2.24%
Network transaction deposits	1,651,937		22,205		5.41%	1,616,719		22,034		5.41%	1,147,089		12,825		4.53%
Time deposits	7,198,315		84,983		4.75%	6,264,621		72,121		4.57%	2,362,260		15,182		2.61%
Total interest-bearing deposits	27,385,005		226,231		3.32%	26,020,510		208,875		3.18%	22,524,853		109,422		1.97%
Federal funds purchased and securities sold under agreements to repurchase	263,979		2,863		4.36%	347,204		3,734		4.27%	429,780		3,143		2.97%
Other short-term funding	449,999		5,603		5.01%	—		—		—%	17,339		—		0.01%
FHLB advances	1,540,247		21,671		5.66%	3,467,433		49,171		5.63%	4,254,532		49,960		4.76%
Long-term funding	539,106		10,058		7.46%	531,155		10,185		7.67%	408,175		6,281		6.16%
Total short and long-term funding	2,793,331		40,194		5.78%	4,345,793		63,090		5.77%	5,109,826		59,384		4.71%
Total interest-bearing liabilities	30,178,337		$	266,425	3.55%	30,366,302		$	271,965	3.55%	27,634,679		$	168,807	2.48%
Noninterest-bearing demand deposits	5,882,052					6,171,240					7,340,219
Other liabilities	527,437					672,597					570,166
Stockholders’ equity	4,181,381					4,120,564					4,062,001
Total liabilities and stockholders’ equity	$	40,769,206				$	41,330,703				$	39,607,065
Interest rate spread					2.09%					1.96%					2.46%
Net free funds					0.70%					0.73%					0.61%
Fully tax-equivalent net interest income and net interest margin			$	261,628	2.79%			$	258,033	2.69%			$	278,782	3.07%
Fully tax-equivalent adjustment			3,770					4,630					4,772
Net interest income			$	257,858				$	253,403				$	274,010

(a) The yield on tax-exempt loans and securities is computed on a fully tax-equivalent basis using a tax rate of 21% and is net of the effects of certain disallowed interest deductions.

(b) Nonaccrual loans and loans held for sale have been included in the average balances.
(c) Interest income includes amortization of net deferred loan origination costs and net accreted purchase loan discount.

52

Notable Contributions to the Change in Net Interest Income

•Fully tax-equivalent net interest income and net interest income were $17 million, or 6%, and $16 million, or 6%, lower than the first three months of 2023, respectively. Since March 31, 2023, the Federal Reserve increased the federal funds target interest rate 50 bp, which contributed to the yield on earning assets increasing by 70 bp and the cost of interest-bearing liabilities increasing 107 bp from the first three months of 2023. See sections Interest Rate Risk and Quantitative and Qualitative Disclosures about Market Risk for a discussion of interest rate risk and market risk.

•Average loans increased $523 million, or 2%, from the first three months of 2023, and average investments and other short-term investments increased $492 million, or 6%, from the first three months of 2023.

•    Average interest-bearing liabilities increased $2.5 billion, or 9%, compared to the first three months of 2023. Average interest-bearing deposits increased $4.9 billion, or 22%, from the first three months of 2023, primarily driven by increases in time deposits, interest-bearing demand deposits, network transaction deposits, and savings deposits, partially offset by a decrease in money market deposits. Average noninterest-bearing demand deposits decreased $1.5 billion, or 20%, versus the first three months of 2023. Average FHLB advances decreased $2.7 billion, or 64%, from the first three months of 2023, partially offset by an increase in other short-term funding related to utilizing the BTFP.

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. The forecast the Corporation used for March 31, 2024 was the Moody's baseline scenario from February 2024, which was reviewed against the March 2024 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. 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

	Three months ended										Changes vs
($ in thousands, except as noted)	Mar 31, 2024		Dec 31, 2023		Sep 30, 2023		Jun 30, 2023		Mar 31, 2023		Dec 31, 2023		Mar 31, 2023
Wealth management fees	$	21,694	$	21,003	$	20,828	$	20,483	$	20,189	3	%	7	%
Service charges and deposit account fees	12,439		10,815		12,864		12,372		12,994		15	%	(4)	%
Card-based fees	11,267		11,528		11,510		11,396		10,586		(2)	%	6	%
Other fee-based revenue	4,402		4,019		4,509		4,465		4,276		10	%	3	%
Total fee-based revenue	49,802		47,365		49,710		48,715		48,045		5	%	4	%
Capital markets, net	4,050		9,106		5,368		5,093		5,083		(56)	%	(20)	%
Mortgage banking, net	2,662		1,615		6,501		7,768		3,545		65	%	(25)	%
Loss on mortgage portfolio sale	—		(136,239)		—		—		—		(100)	%	N/M
Bank and corporate owned life insurance	2,570		3,383		2,047		2,172		2,664		(24)	%	(4)	%
Other	2,327		2,850		2,339		2,080		2,422		(18)	%	(4)	%
Subtotal	61,411		(71,919)		65,965		65,827		61,758		N/M		(1)	%
Asset gains (losses), net	(306)		(136)		625		(299)		263		125	%	N/M
Investment securities gains (losses), net	3,879		(58,958)		(11)		14		51		N/M		N/M
Total noninterest income (loss)	$	64,985	$	(131,013)	$	66,579	$	65,543	$	62,073	N/M		5	%
Mortgage loans originated for sale during period	$	105,394	$	112,365	$	115,075	$	99,141	$	69,254	(6)	%	52	%
Mortgage loan settlements during period	91,026		957,450		103,452		96,514		54,652		(90)	%	67	%
Assets under management, at market value(a)	14,171		13,545		12,543		12,995		12,412		5	%	14	%

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

53

Notable Contributions to the Change in Noninterest Income

•Wealth management fees increased $2 million from the first three months of 2023, mainly driven by increased assets under management.

•Investment securities gains (losses), net increased $4 million from the first three months of 2023, as a result of the sale of the Corporation's remaining Visa B shares.

Noninterest Expense

Table 4 Noninterest Expense

	Three months ended										Change vs
($ in thousands)	Mar 31, 2024		Dec 31, 2023		Sep 30, 2023		Jun 30, 2023		Mar 31, 2023		Dec 31, 2023		Mar 31, 2023
Personnel	$	119,395	$	120,686	$	117,159	$	114,089	$	116,420	(1)	%	3	%
Technology	26,200		28,027		26,172		24,220		23,598		(7)	%	11	%
Occupancy	13,633		14,429		14,125		13,587		15,063		(6)	%	(9)	%
Business development and advertising	6,517		8,350		7,100		7,106		5,849		(22)	%	11	%
Equipment	4,599		4,742		5,016		4,975		4,930		(3)	%	(7)	%
Legal and professional	4,672		6,762		4,461		4,831		3,857		(31)	%	21	%
Loan and foreclosure costs	1,979		585		2,049		1,635		1,138		N/M		74	%
FDIC assessment	13,946		41,497		9,150		9,550		6,875		(66)	%	103	%
Other intangible amortization	2,203		2,203		2,203		2,203		2,203		—	%	—	%
Other	4,513		12,110		8,771		8,476		7,479		(63)	%	(40)	%
Total noninterest expense	$	197,657	$	239,391	$	196,205	$	190,673	$	187,412	(17)	%	5	%
Average FTEs(a)	4,070		4,130		4,220		4,227		4,219		(1)	%	(4)	%

(a) Average FTEs without overtime

Notable Contributions to the Change in Noninterest Expense

•Personnel expense increased $3 million from the first three months of 2023, largely as a result of increased fringe benefit expense.

•Technology expense increased $3 million from the first three months of 2023, driven by digital investments tied to our strategic initiatives.

•FDIC expense increased $7 million from the first three months of 2023, primarily driven by the special assessment applied to the Corporation and other banks relating to the FDIC's increased estimated loss attributable to the protection of depositors at Silicon Valley Bank and Signature Bank.

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 $20 million for the three months ended March 31, 2024, compared to income tax expense of $27 million for the three months ended March 31, 2023. The Corporation's effective tax rate from continuing operations was 19.78% and 20.92% for the three months ended March 31, 2024, and 2023, respectively. The decreases in income tax expense and effective tax rate during the first three months of 2024 were primarily driven by a decrease in pretax income partially offset by an increase in nondeductible expenses. The Corporation expects a full year effective tax rate of 19 to 21%, assuming no change in the statutory corporate tax rate.

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.

54

Balance Sheet Analysis

•At March 31, 2024, total assets were $41.1 billion, up $121 million from December 31, 2023, and up $435 million, or 1%, from March 31, 2023.

•Interest bearing deposits in other financial institutions were $420 million at March 31, 2024, down $5 million, or 1%, from December 31, 2023, and down $91 million, or 18%, from March 31, 2023.

•AFS investment securities, at fair value were $3.7 billion at March 31, 2024, up $123 million, or 3%, from December 31, 2023, and up $343 million, or 10%, from March 31, 2023. HTM investment securities, net, at amortized cost were $3.8 billion at March 31, 2024, down $27 million, or 1%, from December 31, 2023, and down $134 million, or 3%, from March 31, 2023. Additionally, FHLB and Federal Reserve Bank stocks, at cost were $174 million, down $55 million, or 24%, from December 31, 2023 and down $157 million, or 48%, from March 31, 2023, as a result of the paydown of FHLB advances. See Note 5 Investment Securities of the notes to consolidated financial statements for additional details.

•Loans of $29.5 billion at March 31, 2024 were up $278 million, or 1%, from December 31, 2023, and up $287 million, or 1%, from March 31, 2023. See Note 6 Loans of the notes to consolidated financial statements for additional details.

•At March 31, 2024, total deposits of $33.7 billion were up $267 million, or 1%, from December 31, 2023, and were up $3.4 billion, or 11%, from March 31, 2023. See section Deposits and Customer Funding for additional information on deposits.

•Federal funds purchased and securities sold under agreements to repurchase were $266 million at March 31, 2024, down $61 million, or 19%, from December 31, 2023, and up $57 million, or 27%, from March 31, 2023. See Note 8 Short and Long-Term Funding of the notes to consolidated financial statements for additional details.

•FHLB advances were $1.3 billion at March 31, 2024, down $607 million, or 31%, from December 31, 2023, and down $3.7 billion, or 73%, from March 31, 2023. BTFP funding was $500 million at March 31, 2024, which was used to pay down FHLB advances during the quarter. See Note 8 Short and Long-Term Funding of the notes to consolidated financial statements for additional details.

Loans

Table 5 Period End Loan Composition

	Mar 31, 2024				Dec 31, 2023				Sep 30, 2023				Jun 30, 2023				Mar 31, 2023
($ in thousands)	Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total
Commercial and industrial	$	9,858,329	33	%	$	9,731,555	33	%	$	10,099,068	33	%	$	10,055,487	34	%	$	9,869,781	34	%
Commercial real estate — owner occupied	1,095,894		4	%	1,061,700		4	%	1,054,969		3	%	1,058,237		4	%	1,050,236		4	%
Commercial and business lending	10,954,223		37	%	10,793,255		37	%	11,154,037		37	%	11,113,724		37	%	10,920,017		37	%
Commercial real estate — investor	5,035,195		17	%	5,124,245		18	%	5,218,980		17	%	5,312,928		18	%	5,094,249		17	%
Real estate construction	2,287,041		8	%	2,271,398		8	%	2,130,719		7	%	2,009,060		7	%	2,147,070		7	%
Commercial real estate lending	7,322,237		25	%	7,395,644		25	%	7,349,699		24	%	7,321,988		25	%	7,241,318		25	%
Total commercial	18,276,460		62	%	18,188,898		62	%	18,503,736		61	%	18,435,711		62	%	18,161,335		62	%
Residential mortgage	7,868,180		27	%	7,864,891		27	%	8,782,645		29	%	8,746,345		29	%	8,605,164		29	%
Auto finance	2,471,257		8	%	2,256,162		8	%	2,007,164		7	%	1,777,974		6	%	1,551,538		5	%
Home equity	619,764		2	%	628,526		2	%	623,650		2	%	615,506		2	%	609,787		2	%
Other consumer	258,603		1	%	277,740		1	%	275,993		1	%	273,367		1	%	279,248		1	%
Total consumer	11,217,802		38	%	11,027,319		38	%	11,689,451		39	%	11,413,193		38	%	11,045,737		38	%
Total loans	$	29,494,263	100	%	$	29,216,218	100	%	$	30,193,187	100	%	$	29,848,904	100	%	$	29,207,072	100	%

The Corporation has long-term guidelines relative to the proportion of Commercial and Business, CRE, and Consumer loan commitments within the overall loan portfolio, with each targeted to represent 30 to 40% of the overall loan portfolio. The targeted long-term guidelines were unchanged during 2023 and the first three months of 2024. 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 Enterprise Risk Committee of the Corporation’s Board of Directors. These guidelines and limits are designed to create balance and diversification within the loan portfolios.

55

The Corporation’s loan distribution and interest rate sensitivity as of March 31, 2024 are summarized in the following table:

Table 6 Loan Distribution and Interest Rate Sensitivity

($ in thousands)	Within 1 Year(a)		1-5 Years		5-15 Years		Over 15 Years		Total		% of Total
Commercial and industrial	$	8,836,304	$	686,351	$	326,893	$	8,780	$	9,858,329	33	%
Commercial real estate — owner occupied	679,920		293,112		122,863		—		1,095,894		4	%
Commercial real estate — investor	4,677,835		292,300		65,061		—		5,035,195		17	%
Real estate construction	2,244,789		32,646		1,766		7,840		2,287,041		8	%
Commercial - adjustable	11,232,462		36,821		3,538		—		11,272,820		38	%
Commercial - fixed	5,206,386		1,267,588		513,045		16,620		7,003,640		24	%
Residential mortgage - adjustable	203,699		602,574		1,549,413		295		2,355,982		8	%
Residential mortgage - fixed	4,712		72,493		499,394		4,935,599		5,512,198		19	%
Auto finance	651		1,075,501		1,395,104		—		2,471,257		8	%
Home equity	565,196		10,358		34,966		9,245		619,764		2	%
Other consumer	194,771		32,113		20,666		11,052		258,603		1	%
Total loans	$	17,407,877	$	3,097,448	$	4,016,126	$	4,972,812	$	29,494,263	100	%
Fixed-rate	$	5,220,674	$	2,456,672	$	2,463,175	$	4,972,517	$	15,113,038	51	%
Floating or adjustable rate	12,187,203		640,776		1,552,950		295		14,381,225		49	%
Total	$	17,407,877	$	3,097,448	$	4,016,126	$	4,972,812	$	29,494,263	100	%

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

At March 31, 2024, $19.6 billion, or 66%, of the loans outstanding and $16.5 billion, or 90%, 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 are performed to monitor trends, financial performance, and concentrations. See Note 6 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 March 31, 2024, 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 and equipment financing.

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

March 31, 2024	NAICS Subsector	Outstanding Balance		Total Exposure		% of Total Loan Exposure
($ in thousands)
Real Estate(a)	531	$	1,768,102	$	3,292,974	8	%
Utilities(b)	221	2,584,397		3,190,718		8	%
Credit Intermediation and Related Activities(c)	522	786,948		1,741,721		4	%
Merchant Wholesalers, Durable Goods	423	453,915		931,764		2	%

(a) Includes REIT lines.

(b) 59% of the total utilities exposure comes from renewable energy sources (wind, solar, hydroelectric, and geothermal).

(c) Includes 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.

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Commercial real estate - investor: CRE-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

March 31, 2024	% of Total Loan Exposure		% of Total Commercial Real Estate - Investor Loan Exposure
Multi-Family	4	%	33	%
Industrial	3	%	25	%
Office	3	%	21	%

The remaining CRE-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

March 31, 2024	% of Total Loan Exposure		% of Total Real Estate Construction Loan Exposure
Multi-Family	5	%	49	%
Industrial	2	%	23	%

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. 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.

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 three-state branch footprint, with approximately 88% of the outstanding loan balances in the Corporation's branch footprint at March 31, 2024. 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. Most of the adjustable rate mortgages have an initial fixed rate term of 3, 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.

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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%. 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 16 states throughout the Northeast, Mid-Atlantic, and Midwestern 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. Over time, the Corporation expects roughly 60% of originations to be secured by used vehicles.

Other consumer: Other consumer consists of student loans, short-term personal installment loans, and credit cards. Credit risk for student loans, short-term personal installment loans, and credit cards 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.

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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:

Table 10 Nonperforming Assets

($ in thousands)	Mar 31, 2024			Dec 31, 2023			Sep 30, 2023			Jun 30, 2023			Mar 31, 2023
Nonperforming assets
Commercial and industrial	$	72,243		$	62,022		$	74,812		$	34,907		$	22,735
Commercial real estate — owner occupied	2,090			1,394			3,936			1,444			1,478
Commercial and business lending	74,333			63,416			78,748			36,352			24,213
Commercial real estate — investor	18,697			—			10,882			22,068			25,122
Real estate construction	18			6			103			125			178
Commercial real estate lending	18,715			6			10,985			22,193			25,300
Total commercial	93,047			63,422			89,732			58,544			49,513
Residential mortgage	69,954			71,142			66,153			61,718			58,274
Auto finance	7,158			5,797			4,533			3,065			2,436
Home equity	8,100			8,508			7,917			7,788			7,246
Other consumer	87			128			222			163			100
Total consumer	85,299			85,574			78,826			72,733			68,056
Total nonaccrual loans	178,346			148,997			168,558			131,278			117,569
Commercial real estate owned	914			914			1,062			1,062			3,071
Residential real estate owned	920			1,290			989			870			2,987
Bank properties real estate owned(a)	6,603			8,301			6,400			5,643			9,125
OREO	8,437			10,506			8,452			7,575			15,184
Repossessed assets	1,241			919			658			348			92
Total nonperforming assets	$	188,025		$	160,421		$	177,668		$	139,201		$	132,845
Accruing loans past due 90 days or more
Commercial	$	426		$	19,812		$	441		$	366		$	323
Consumer	1,992			1,876			1,715			1,360			1,380
Total accruing loans past due 90 days or more	$	2,417		$	21,689		$	2,156		$	1,726		$	1,703
Restructured loans (accruing)
Commercial	$	377		$	306		$	234		$	168		$	47
Consumer	2,080			2,414			1,855			1,271			716
Total restructured loans (accruing)	$	2,457		$	2,719		$	2,089		$	1,439		$	763
Nonaccrual restructured loans (included in nonaccrual loans)	$	1,141		$	805		$	961		$	796		$	341
Ratios
Nonaccrual loans to total loans	0.60		%	0.51		%	0.56		%	0.44		%	0.40		%
NPAs to total loans plus OREO and repossessed assets	0.64		%	0.55		%	0.59		%	0.47		%	0.45		%
NPAs to total assets	0.46		%	0.39		%	0.43		%	0.34		%	0.33		%
Allowance for credit losses on loans to nonaccrual loans	217.43		%	258.98		%	225.78		%	287.20		%	311.48		%

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Table 10 Nonperforming Assets (continued)

($ in thousands)	Mar 31, 2024		Dec 31, 2023		Sep 30, 2023		Jun 30, 2023		Mar 31, 2023
Accruing loans 30-89 days past due
Commercial and industrial	$	521	$	5,565	$	1,507	$	12,005	$	4,239
Commercial real estate — owner occupied	—		358		1,877		1,484		2,955
Commercial and business lending	521		5,923		3,384		13,489		7,195
Commercial real estate — investor	19,164		18,697		10,121		—		—
Real estate construction	1,260		—		10		76		—
Commercial real estate lending	20,424		18,697		10,131		76		—
Total commercial	20,945		24,619		13,515		13,565		7,195
Residential mortgage	9,903		13,446		11,652		8,961		7,626
Auto finance	12,521		17,386		16,688		11,429		8,640
Home equity	2,819		4,208		3,687		4,030		4,113
Other consumer	2,260		2,166		1,880		2,025		1,723
Total consumer	27,503		37,205		33,908		26,444		22,102
Total accruing loans 30-89 days past due	$	48,448	$	61,825	$	47,422	$	40,008	$	29,297

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

Nonaccrual loans: Nonaccrual loans are considered to be one indicator of potential future loan losses. See Note 6 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.

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 6 Loans of the notes to consolidated financial statements for additional restructured loans disclosures.

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

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 6 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 March 31, 2024 was the Moody's baseline scenario from February 2024, which was reviewed against the March 2024 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 for additional information on the ACLL. See section Nonperforming Assets for a detailed discussion on asset quality. See also Note 6 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 March 31, 2024 and December 31, 2023 was generally comparable. The methodology to calculate the ACLL consists of the following components: a valuation allowance estimate is established for

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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.

Table 11 Allowance for Credit Losses on Loans

	Quarter Ended
($ in thousands)	Mar 31, 2024			Dec 31, 2023			Sep 30, 2023			Jun 30, 2023			Mar 31, 2023
Allowance for loan losses
Balance at beginning of period	$	351,094		$	345,795		$	338,750		$	326,432		$	312,720
Provision for loan losses	27,000			21,000			25,500			23,500			17,000
Charge offs	(24,018)			(17,878)			(20,535)			(14,855)			(5,501)
Recoveries	1,930			2,177			2,079			3,674			2,212
Net (charge offs) recoveries	(22,088)			(15,701)			(18,455)			(11,181)			(3,289)
Balance at end of period	$	356,006		$	351,094		$	345,795		$	338,750		$	326,432
Allowance for unfunded commitments
Balance at beginning of period	$	34,776		$	34,776		$	38,276		$	39,776		$	38,776
Provision for unfunded commitments	(3,000)			—			(3,500)			(1,500)			1,000
Balance at end of period	$	31,776		$	34,776		$	34,776		$	38,276		$	39,776
Allowance for credit losses on loans	$	387,782		$	385,870		$	380,571		$	377,027		$	366,208
Provision for credit losses on loans	24,000			21,000			22,000			22,000			18,000
Net loan (charge offs) recoveries
Commercial and industrial	(18,638)			(13,178)			(16,558)			(11,177)			(1,759)
Commercial real estate — owner occupied	2			(22)			2			3			3
Commercial and business lending	(18,636)			(13,200)			(16,556)			(11,174)			(1,756)
Commercial real estate — investor	—			216			272			2,276			—
Real estate construction	30			38			18			(18)			18
Commercial real estate lending	30			253			290			2,257			18
Total commercial	(18,606)			(12,947)			(16,266)			(8,917)			(1,738)
Residential mortgage	(62)			(53)			(22)			(283)			(53)
Auto finance	(2,094)			(1,436)			(1,269)			(1,048)			(957)
Home equity	211			185			128			183			340
Other consumer	(1,537)			(1,450)			(1,027)			(1,117)			(881)
Total consumer	(3,482)			(2,754)			(2,189)			(2,264)			(1,550)
Total net (charge offs) recoveries	$	(22,088)		$	(15,701)		$	(18,455)		$	(11,181)		$	(3,289)
Ratios
Allowance for credit losses on loans to total loans	1.31		%	1.32		%	1.26		%	1.26		%	1.25		%
Allowance for credit losses on loans to net charge offs (annualized)	4.4x			6.2x			5.2x			8.4x			27.5x
Loan evaluation method for ACLL
Individually evaluated for impairment	$	25,335		$	15,492		$	11,033		$	12,268		$	11,585
Collectively evaluated for impairment	362,447			370,378			369,538			364,759			354,623
Total ACLL	$	387,782		$	385,870		$	380,571		$	377,027		$	366,208
Loan balance
Individually evaluated for impairment	$	92,960		$	62,712		$	86,195		$	58,109		$	48,934
Collectively evaluated for impairment	29,401,303			29,153,505			30,106,993			29,790,795			29,158,138
Total loan balance	$	29,494,263		$	29,216,218		$	30,193,187		$	29,848,904		$	29,207,072

N/M = Not Meaningful

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Table 12 Annualized Net (Charge Offs) Recoveries(a)

	Quarter Ended
(In basis points)	Mar 31, 2024	Dec 31, 2023	Sep 30, 2023	Jun 30, 2023	Mar 31, 2023
Net loan (charge offs) recoveries
Commercial and industrial	(77)	(54)	(66)	(46)	(7)
Commercial real estate — owner occupied	—	(1)	—	—	—
Commercial and business lending	(69)	(48)	(60)	(41)	(7)
Commercial real estate — investor	—	2	2	18	—
Real estate construction	1	1	—	—	—
Commercial real estate lending	—	1	2	12	—
Total commercial	(41)	(28)	(35)	(20)	(4)
Residential mortgage	—	—	—	(1)	—
Auto finance	(35)	(27)	(27)	(25)	(26)
Home equity	14	12	8	12	22
Other consumer	(232)	(208)	(148)	(163)	(125)
Total consumer	(13)	(9)	(7)	(8)	(6)
Total net (charge offs) recoveries	(30)	(21)	(25)	(15)	(5)

(a) Annualized ratio of net charge offs to average loans by loan type.

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

•Total loans increased $278 million, or 1%, from December 31, 2023, and increased $287 million, or 1%, from March 31, 2023. The increase from December 31, 2023 was primarily due to growth in auto finance and commercial and business lending, partially offset by a decrease in CRE - investor lending. The increase from March 31, 2023 was driven by growth in auto finance and real estate construction lending, partially offset by a decrease in residential mortgage lending resulting from the Corporation's strategic initiatives. See also Note 6 Loans of the notes to consolidated financial statements for additional information on loans.

•Total nonaccrual loans increased $29 million, or 20%, from December 31, 2023, and increased $61 million, or 52%, from March 31, 2023. The increase from December 31, 2023 was driven by increases in nonaccrual loans within CRE-investor lending and commercial and industrial lending. The increase from March 31, 2023 was primarily due to increases in nonaccrual loans within commercial and industrial lending and residential mortgage lending, partially offset by a decrease in CRE-investor lending. See Note 6 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 $19 million from March 31, 2023, primarily driven by an increase in net charge offs within commercial and industrial lending. 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 March 31, 2024.

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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

	Mar 31, 2024				Dec 31, 2023				Sep 30, 2023				Jun 30, 2023				Mar 31, 2023
($ in thousands)	Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total
Noninterest-bearing demand	$	6,254,135	19	%	$	6,119,956	18	%	$	6,422,994	20	%	$	6,565,666	21	%	$	7,328,689	24	%
Savings	5,124,639		15	%	4,835,701		14	%	4,836,735		15	%	4,777,415		15	%	4,730,472		16	%
Interest-bearing demand	8,747,127		26	%	8,843,967		26	%	7,528,154		23	%	7,037,959		22	%	6,977,121		23	%
Money market	6,721,674		20	%	6,330,453		19	%	7,268,506		23	%	7,521,930		23	%	8,357,625		28	%
Brokered CDs	3,931,230		12	%	4,447,479		13	%	3,351,399		10	%	3,818,325		12	%	1,185,565		4	%
Other time deposits	2,934,352		9	%	2,868,494		9	%	2,715,538		8	%	2,293,114		7	%	1,752,351		6	%
Total deposits	$	33,713,158	100	%	$	33,446,049	100	%	$	32,123,326	100	%	$	32,014,409	100	%	$	30,331,824	100	%
Other customer funding(a)	90,536				106,620				151,644				170,873				226,258
Total deposits and other customer funding	$	33,803,694			$	33,552,669			$	32,274,971			$	32,185,282			$	30,558,081
Network transaction deposits(b)	$	1,792,820			$	1,566,139			$	1,649,389			$	1,600,619			$	1,273,420
Net deposits and other customer funding(c)	28,079,644				27,539,051				27,274,183				26,766,338				28,099,096
Time deposits of more than $250,000	543,469				522,626				533,853				465,446				345,169

(a) Includes repurchase agreements and commercial paper.
(b) Included above in interest-bearing demand and money market.
(c) Total deposits and other customer funding, excluding brokered CDs and network transaction deposits.

•Total deposits, which are the Corporation's largest source of funds, increased $267 million, or 1%, from December 31, 2023, and increased $3.4 billion, or 11%, from March 31, 2023, the latter primarily due to increases in brokered CDs, interest-bearing demand, other time deposits, network transaction deposits and savings, partially offset by decreases in money market and noninterest-bearing demand.

•Estimated uninsured and uncollateralized deposits, excluding intercompany deposits, were 22.9% of total deposits at March 31, 2024, compared to 22.7% at December 31, 2023 and 26.2% at March 31, 2023.

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 percentage 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 March 31, 2024, 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 March 31, 2024, the Bank had $7.0 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 March 31, 2024, the Bank had $1.4 billion available for discount window borrowings.

•A $200 million Parent Company commercial paper program, of which there was none outstanding as of March 31, 2024.

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•Dividends and service fees from subsidiaries, as well as the proceeds from issuance of capital, which are also funding sources for the Parent Company.

•Acquisition related equity issuances by the Parent Company; the Corporation has filed a shelf registration statement with the SEC under which the Parent Company may, from time to time, offer shares of the Corporation’s common stock in connection with acquisitions of businesses, assets, or securities of other companies.

•Other 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 from time to time offer up to $2.0 billion aggregate principal amount of its unsecured senior and subordinated notes.

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

($ in thousands)	Mar 31, 2024			Dec 31, 2023			Sep 30, 2023			Jun 30, 2023			Mar 31, 2023
Federal Reserve Bank balance	$	419,554		$	421,848		$	314,287		$	178,983		$	504,169
Available FHLB Chicago capacity	7,035,768			5,985,385			5,377,628			5,148,360			3,453,813
Available Federal Reserve Bank discount window capacity	1,438,992			1,433,655			1,335,938			1,635,140			1,799,453
Available BTFP capacity	—			522,465			618,829			633,817			644,915
Funding available within one business day(a)	8,894,314			8,363,353			7,646,682			7,596,300			6,402,351
Available federal funds lines	1,670,000			1,550,000			2,518,000			2,623,000			2,773,000
Available brokered deposits capacity(b)	446,513			138,512			1,240,488			761,301			3,646,393
Unsecured debt capacity(c)	1,000,000			1,000,000			1,000,000			1,000,000			1,000,000
Total available liquidity	$	12,010,827		$	11,051,865		$	12,405,170		$	11,980,601		$	13,821,744
Uninsured and uncollateralized deposits	$	7,710,911		$	7,586,047		$	7,269,248		$	7,081,826		$	7,938,690
Coverage ratio of uninsured and uncollateralized deposits with secured funding available within one business day	115		%	110		%	105		%	107		%	81		%
Coverage ratio of uninsured and uncollateralized deposits with total funding	156		%	146		%	171		%	169		%	174		%

(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) Availability based on internal policy limitations.

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 II, Item 1A, Risk Factors.

For the three months ended March 31, 2024, net cash provided by operating and financing activities was $155 million and $49 million, respectively, while net cash used in investing activities was $275 million, for a net decrease in cash and cash equivalents of $72 million since year-end 2023. At March 31, 2024, assets of $41.1 billion increased $121 million from year-end 2023. On the funding side, deposits of $33.7 billion increased $267 million, or 1%, from year-end 2023, short-term funding increased $439 million, or 134%, and FHLB advances decreased $607 million, or 31%.

For the three months ended March 31, 2023, net cash provided by operating and financing activities was $47 million and $1.2 billion, respectively, while net cash used in investing activities was $1.1 billion, for a net increase in cash and cash equivalents of $201 million since year-end 2022. At March 31, 2023, assets of $40.7 billion increased $1.3 billion, or 3%, from year-end 2022, primarily due to increases in AFS Securities, loan growth and cash balances. On the funding side, deposits of $30.3 billion increased $696 million, or 2%, from year-end 2022, FHLB advances increased $666 million, or 15%, and other long-term funding increased $296 million, or 119%, the latter due to the issuance of subordinated debt.

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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.

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 March 31, 2024.

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 2023 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 three months of 2024.

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

	Mar 31, 2024				Dec 31, 2023
	Dynamic Forecast		Static Forecast		Dynamic Forecast		Static Forecast
Gradual Rate Change
100 bp increase in interest rates	1.7	%	1.6	%	1.9	%	2.2	%
200 bp increase in interest rates	3.2	%	3.1	%	3.8	%	4.3	%
100 bp decrease in interest rates	(1.0)	%	(1.0)	%	(1.3)	%	(1.5)	%
200 bp decrease in interest rates	(1.9)	%	(1.8)	%	(2.6)	%	(3.1)	%

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At March 31, 2024, 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

	Mar 31, 2024		Dec 31, 2023
Instantaneous Rate Change
100 bp increase in interest rates	(9.5)	%	(10.1)	%
200 bp increase in interest rates	(19.0)	%	(20.1)	%
100 bp decrease in interest rates	9.1	%	9.7	%
200 bp decrease in interest rates	17.4	%	18.5	%

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 MVE measure in the 200 bp increase in interest rates scenario is outside of the policy limit, which has been reported to the Corporation's Board.

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.

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

The following table summarizes significant contractual obligations and other commitments at March 31, 2024, 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)	Note Reference	One Year or Less		One to Three Years		Three to Five Years		Over Five Years		Total
Time deposits		$	6,744,548	$	103,594	$	17,435	$	5	$	6,865,582
Short-term funding	8	765,671		—		—		—		765,671
FHLB advances	8	138,000		997,989		196,981		440		1,333,411
Other long-term funding	8	249,913		180		92		285,869		536,055
Operating leases	16	5,578		9,367		6,875		3,994		25,813
Total		$	7,903,710	$	1,111,130	$	221,383	$	290,308	$	9,526,532

The Corporation also has obligations under its derivatives, lending-related commitments, and retirement plans as described in Note 9 Derivative and Hedging Activities, Note 11 Commitments, Off-Balance Sheet Arrangements, Legal Proceedings, and Regulatory Matters, and Note 13 Retirement Plans of the notes to consolidated financial statements, respectively. Further discussion of the nature of each obligation is included in the referenced note to the 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 March 31, 2024, 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, 2023.

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Table 18 Capital Ratios

	Quarter Ended
($ in thousands)	Mar 31, 2024			Dec 31, 2023			Sep 30, 2023			Jun 30, 2023			Mar 31, 2023
Risk-based capital(a)
CET1	$	3,088,613		$	3,074,938		$	3,197,445		$	3,143,131		$	3,085,618
Tier 1 capital	3,282,725			3,269,050			3,391,557			3,337,243			3,279,730
Total capital	3,957,879			3,997,205			4,103,998			4,051,096			3,990,606
Total risk-weighted assets	32,753,344			32,732,710			33,497,484			33,143,953			32,645,966
Modified CECL transitional amount	22,425			44,851			44,851			44,851			44,851
CET1 capital ratio	9.43		%	9.39		%	9.55		%	9.48		%	9.45		%
Tier 1 capital ratio	10.02		%	9.99		%	10.12		%	10.07		%	10.05		%
Total capital ratio	12.08		%	12.21		%	12.25		%	12.22		%	12.22		%
Tier 1 leverage ratio	8.24		%	8.06		%	8.42		%	8.40		%	8.46		%
Selected equity and performance ratios
Total stockholders’ equity / total assets	10.13		%	10.18		%	9.91		%	10.00		%	10.14		%
Dividend payout ratio(b)	42.31		%	N/M			39.62		%	37.50		%	31.34		%
Return on average assets	0.80		%	(0.87)		%	0.80		%	0.86		%	1.06		%
Annualized noninterest expense / average assets	1.95		%	2.30		%	1.90		%	1.89		%	1.92		%

N/M = Not Meaningful
(a) The Federal Reserve establishes regulatory capital requirements, including well-capitalized standards for the Corporation. The Corporation follows Basel III, subject to certain
    transition provisions. These regulatory capital measurements are used by management, regulators, investors, and analysts to assess, monitor, and compare the quality and
    composition of the Corporation's capital with the capital of other financial services companies.
(b) Ratio is based upon basic earnings per common share.

See Part II, Item 2, Unregistered Sales of Equity Securities and Use of Proceeds, for information on the shares repurchased during the first quarter of 2024.

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Non-GAAP Measures

Table 19 Non-GAAP Measures

	Quarter Ended
($ in thousands)	Mar 31, 2024			Dec 31, 2023			Sep 30, 2023			Jun 30, 2023			Mar 31, 2023
Selected equity and performance ratios(a)(b)(c)
Tangible common equity / tangible assets	7.08		%	7.11		%	6.88		%	6.94		%	7.03		%
Return on average equity	7.81		%	(8.74)		%	7.99		%	8.47		%	10.32		%
Return on average tangible common equity	11.31		%	(13.13)		%	11.67		%	12.38		%	15.26		%
Return on average CET1	10.27		%	(11.85)		%	10.08		%	10.88		%	13.38		%
Return on average tangible assets	0.84		%	(0.88)		%	0.84		%	0.90		%	1.11		%
Average stockholders' equity / average assets	10.26		%	9.97		%	10.06		%	10.18		%	10.26		%
Tangible common equity reconciliation(a)
Common equity	$	3,974,561		$	3,979,861		$	3,933,531		$	3,928,762		$	3,931,551
Goodwill and other intangible assets, net	(1,143,261)			(1,145,464)			(1,147,666)			(1,149,869)			(1,152,072)
Tangible common equity	$	2,831,300		$	2,834,398		$	2,785,865		$	2,778,893		$	2,779,480
Tangible assets reconciliation(a)
Total assets	$	41,137,084		$	41,015,855		$	41,637,381		$	41,219,473		$	40,702,519
Goodwill and other intangible assets, net	(1,143,261)			(1,145,464)			(1,147,666)			(1,149,869)			(1,152,072)
Tangible assets	$	39,993,824		$	39,870,392		$	40,489,715		$	40,069,604		$	39,550,448
Average tangible common equity and average CET1 reconciliation(a)
Common equity	$	3,987,269		$	3,926,452		$	3,937,940		$	3,934,949		$	3,867,890
Goodwill and other intangible assets, net	(1,144,588)			(1,146,677)			(1,148,951)			(1,151,039)			(1,153,173)
Tangible common equity	2,842,681			2,779,775			2,788,989			2,783,910			2,714,716
Modified CECL transitional amount	22,425			44,851			44,851			44,851			44,851
Accumulated other comprehensive loss	188,067			286,402			302,043			251,624			258,827
Deferred tax assets, net	12,303			26,580			27,694			27,714			28,157
Average CET1	$	3,065,475		$	3,137,608		$	3,163,577		$	3,108,099		$	3,046,551
Average tangible assets reconciliation(a)
Total assets	$	40,769,206		$	41,330,703		$	41,075,980		$	40,558,311		$	39,607,065
Goodwill and other intangible assets, net	(1,144,588)			(1,146,677)			(1,148,951)			(1,151,039)			(1,153,173)
Tangible assets	$	39,624,617		$	40,184,026		$	39,927,029		$	39,407,273		$	38,453,892
Adjusted net income reconciliation(b)
Net income	$	81,169		$	(90,806)		$	83,248		$	87,154		$	103,360
Other intangible amortization, net of tax	1,652			1,652			1,652			1,652			1,652
Adjusted net income	$	82,821		$	(89,154)		$	84,900		$	88,806		$	105,012
Adjusted net income available to common equity reconciliation(b)
Net income available to common equity	$	78,294		$	(93,681)		$	80,373		$	84,279		$	100,485
Other intangible amortization, net of tax	1,652			1,652			1,652			1,652			1,652
Adjusted net income available to common equity	$	79,946		$	(92,029)		$	82,025		$	85,931		$	102,137
End of period core customer deposits reconciliation
Total deposits	$	33,713,158		$	33,446,049		$	32,123,326		$	32,014,409		$	30,331,824
Network transaction deposits	(1,792,820)			(1,566,139)			(1,649,389)			(1,600,619)			(1,273,420)
Brokered CDs	(3,931,230)			(4,447,479)			(3,351,399)			(3,818,325)			(1,185,565)
Core customer deposits	$	27,989,108		$	27,432,431		$	27,122,539		$	26,595,465		$	27,872,839
Efficiency ratio reconciliation(d)
Federal Reserve efficiency ratio	61.03		%	132.01		%	60.06		%	58.49		%	56.07		%
Fully tax-equivalent adjustment	(0.71)		%	(3.29)		%	(0.89)		%	(0.85)		%	(0.79)		%
Other intangible amortization	(0.69)		%	(1.21)		%	(0.69)		%	(0.68)		%	(0.66)		%
Fully tax-equivalent efficiency ratio	59.63		%	127.54		%	58.50		%	56.96		%	54.64		%

(a) Tangible common equity and tangible assets exclude goodwill and other intangible assets, net.

(b) Adjusted net income and adjusted net income available to common equity, which are used in the calculation of return on average tangible assets and return on average tangible common equity, respectively, add back other intangible amortization, net of tax.

(c) These capital measurements are used by management, regulators, investors, and analysts to assess, monitor, and compare the quality and composition of our capital with the capital of other financial services companies.

(d) The efficiency ratio as defined by the Federal Reserve guidance is noninterest expense (which includes the provision for unfunded commitments) divided by the sum of net interest income plus noninterest income, excluding investment securities gains (losses), net. The fully tax-equivalent efficiency ratio is noninterest expense (which includes the provision for unfunded commitments), excluding other intangible amortization, divided by the sum of fully tax-equivalent net interest income plus noninterest income, excluding investment securities gains (losses), net.

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Sequential Quarter Results

The Corporation reported net income of $81 million for the first quarter of 2024, compared to net loss of $91 million for the fourth quarter of 2023, due to the balance sheet repositioning executed in the fourth quarter of 2023. Net income available to common equity was $78 million for the first quarter of 2024, or $0.52 for both basic and diluted earnings per common share. Comparatively, net loss available to common equity for the fourth quarter of 2023 was $94 million, or a loss of $0.63 for basic and $0.62 for diluted earnings per common share (see Table 1).

Fully tax-equivalent net interest income for the first quarter of 2024 was $262 million, $4 million, or 1%, higher than the fourth quarter of 2023. The net interest margin in the first quarter of 2024 was up 10 bp to 2.79%. The increases in net interest income and net interest margin were due to a full quarter of benefit from the balance sheet repositioning announced during the fourth quarter of 2023. Average earning assets decreased $678 million, or 2%, to $37.6 billion in the first quarter of 2024. Average loans decreased $583 million, or 2%, driven primarily by a decrease in residential mortgages and partially offset by growth in auto finance. On the funding side, average total interest-bearing deposits increased $1.4 billion, or 5%, due to increases in time deposits, interest-bearing demand, savings, and network transaction deposits, partially offset by a decrease in money market. Average FHLB advances decreased $1.9 billion, or 56%, due to deposit growth, paydowns with the proceeds of the mortgage portfolio sale in the fourth quarter of 2023, and the utilization of the BTFP (see Table 2).

The provision for credit losses was $24 million for the first quarter of 2024 and $21 million for the fourth quarter of 2023 (see Table 11). See discussion under sections: Provision for Credit Losses, Nonperforming Assets, and Allowance for Credit Losses on Loans.

Noninterest income for the first quarter of 2024 was $65 million, up $196 million from the fourth quarter of 2023, primarily due to one-time items related to the balance sheet repositioning announced in the fourth quarter of 2023 (see Table 3).

Noninterest expense for the first quarter of 2024 was $198 million, down $42 million, or 17%, from the fourth quarter of 2023, driven primarily by the FDIC special assessment (see Table 4).

For the first quarter of 2024, the Corporation recognized income tax expense of $20 million, compared to income tax benefit of $47 million for the fourth quarter of 2023. See section Income Taxes for a detailed discussion on income taxes.

Segment Review

As discussed in Note 14 Segment Reporting of the notes to consolidated financial statements, the Corporation’s reportable segments have been determined based upon its internal profitability reporting system, which is organized by strategic business unit. Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer, and the distribution of those products and services are similar. The reportable segments are Corporate and Commercial Specialty; Community, Consumer and Business; and Risk Management and Shared Services.

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Table 20 Selected Segment Financial Data

	Three Months Ended Mar 31,
($ in thousands)	2024			2023			% Change
Corporate and Commercial Specialty
Total revenue	$	183,617		$	170,860		7%
Provision for credit losses	15,428			13,782			12%
Noninterest expense	66,350			62,119			7%
Income tax expense	21,081			17,726			19%
Net income	80,758			77,234			5%
Average earning assets	17,643,512			17,106,092			3%
Average loans	17,638,414			17,090,623			3%
Average deposits	9,313,790			9,692,711			(4)%
Average allocated capital (Average CET1)(a)	1,711,227			1,704,400			—%
Return on average allocated capital(a)	18.98		%	18.38		%	60 bp
Community, Consumer, and Business
Total revenue	$	212,845		$	194,310		10%
Provision for credit losses	6,825			6,758			1%
Noninterest expense	110,490			111,735			(1)%
Income tax expense	20,062			15,922			26%
Net income	75,468			59,895			26%
Average earning assets	11,169,320			11,253,794			(1)%
Average loans	11,169,320			11,253,794			(1)%
Average deposits	18,091,904			18,121,871			—%
Average allocated capital (Average CET1)(a)	736,489			711,504			4%
Return on average allocated capital(a)	41.21		%	34.14		%	N/M
Risk Management and Shared Services
Total revenue	$	(73,620)		$	(29,087)		153%
Provision for credit losses	1,747			(2,568)			N/M
Noninterest expense	20,817			13,558			54%
Income tax (benefit)	(21,127)			(6,307)			N/M
Net (loss)	(75,058)			(33,770)			122%
Average earning assets	8,783,348			8,220,928			7%
Average loans	561,288			501,401			12%
Average deposits	5,861,362			2,050,490			186%
Average allocated capital (Average CET1)(a)	617,759			630,647			(2)%
Return on average allocated capital(a)	(50.74)		%	(23.57)		%	N/M
Consolidated Total
Total revenue	$	322,842		$	336,083		(4)%
Return on average allocated capital(a)	10.27		%	13.38		%	N/M

N//M = Not meaningful

(a) The Federal Reserve establishes capital adequacy requirements for the Corporation, including CET1. For segment reporting purposes, the ROCET1 reflects return on average allocated CET1. The ROCET1 for the Risk Management and Shared Services segment and the Consolidated Total is inclusive of the annualized effect of the preferred stock
dividends.

Notable Changes in Segment Financial Data

The Corporate and Commercial Specialty segment consists of lending and deposit solutions to larger businesses, developers, not-for-profits, municipalities, and financial institutions, and the support to deliver, fund, and manage such banking solutions. In addition, this segment provides a variety of investment, fiduciary, and retirement planning products and services to individuals and small to mid-sized businesses.

•Total revenue increased $13 million from the three months ended March 31, 2023, primarily attributable to higher loan volumes and interest rates driving net interest income higher.

•Noninterest expense increased $4 million from the three months ended March 31, 2023, primarily due to higher personnel costs and allocated corporate overhead.

•Average loans increased $548 million from the three months ended March 31, 2023, primarily driven by growth in commercial and business lending and CRE lending.

70

•Average deposits decreased $379 million from the three months ended March 31, 2023, driven by decreases in noninterest-bearing demand deposits and money market deposits, partially offset by an increase in interest-bearing demand deposits.

The Community, Consumer, and Business segment consists of lending and deposit solutions to individuals and small to mid-sized businesses.

•Total revenue increased $19 million from the three months ended March 31, 2023, primarily attributable to receiving net FTP credit for providing funding for the Corporation and higher interest rates.

The Risk Management and Shared Services segment includes key shared Corporate functions, Parent Company activity, intersegment eliminations, and residual revenues and expenses.

•Total revenue decreased $45 million from the three months ended March 31, 2023, primarily driven by increased interest expense as a result of holding more brokered CDs and other short term funding.

•Provision for credit losses increased $4 million from the three months ended March 31, 2023, driven by loan growth, nominal credit movement, and general macroeconomic trends.

•Noninterest expense increased $7 million from the three months ended March 31, 2023, driven by the FDIC special assessment.

•Average earning assets increased $562 million from the three months ended March 31, 2023, primarily driven by higher balances of AFS investment securities in the portfolio.

•Average deposits increased $3.8 billion from the three months ended March 31, 2023, primarily driven by increases in brokered CDs and network deposits.

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 2023 Annual Report on Form 10-K. There have been no changes in the Corporation's application of critical accounting estimates since December 31, 2023.

Recent Developments

On April 30, 2024, the Corporation’s Board of Directors declared a regular quarterly cash dividend of $0.22 per common share, payable on June 17, 2024 to shareholders of record at the close of business on June 3, 2024. The Board of Directors also declared a regular quarterly cash dividend of $0.3671875 per depositary share on Associated's 5.875% Series E Perpetual Preferred Stock, payable on June 17, 2024 to shareholders of record at the close of business on June 3, 2024. The Board of Directors also declared a regular quarterly cash dividend of $0.3515625 per depositary share on Associated's 5.625% Series F Perpetual Preferred Stock, payable on June 17, 2024 to shareholders of record at the close of business on June 3, 2024.

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.

71

ITEM 4.     Controls and Procedures

The Corporation maintains disclosure controls and procedures as required under Rule 13a-15 promulgated under the Securities Exchange Act of 1934, as amended, 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 March 31, 2024, 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 March 31, 2024.

No changes were made to the Corporation’s internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act of 1934) during the last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Corporation’s internal control over financial reporting.

72

PART II - OTHER INFORMATION

ITEM 1. Legal Proceedings

The information required by this item is set forth in Part I, Item 1 under Note 11 Commitments, Off-Balance Sheet Arrangements, Legal Proceedings, and Regulatory Matters 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 2023 Annual Report on Form 10-K.

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

During the first quarter of 2024, the Corporation repurchased $23 million of common stock, including $18 million of open market purchases and $5 million of repurchases 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
January 1, 2024 - January 31, 2024	—	$	—	—
February 1, 2024 - February 29, 2024	1,043,080	20.27		900,000
March 1, 2024 - March 31, 2024	83,219	20.68		—
Total	1,126,299	$	20.30	900,000	2,852,467

(a) During the first quarter of 2024, the Corporation repurchased 226,299 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' authorization.

(b) At March 31, 2024, there remained $61 million authorized to be repurchased under the Board of Directors' 2021 $100 million authorization. The maximum number of shares that may yet be purchased under this authorization is based on the closing share price on March 31, 2024.

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 March 31, 2024, 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.

73

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 March 31, 2024 has been formatted in Inline XBRL (Inline Extensible Business Reporting Language) and contained in Exhibits in 101.

74

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: April 30, 2024	/s/ Andrew J. Harmening
	Andrew J. Harmening
	President and Chief Executive Officer
Date: April 30, 2024	/s/ Derek S. Meyer
	Derek S. Meyer
	Chief Financial Officer
Date: April 30, 2024	/s/ Tammy C. Stadler
	Tammy C. Stadler
	Chief Accounting Officer

75

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: April 30, 2024	/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: April 30, 2024	/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 March 31, 2024 (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

April 30, 2024

/s/ Derek S. Meyer

Derek S. Meyer

Chief Financial Officer

April 30, 2024

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2024	Apr. 26, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-31343
Entity Registrant Name	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		150,766,697
Entity Central Index Key	0000007789
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
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
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 ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
AFS investment securities, at fair value	$ 3,724,148	$ 3,600,892
HTM investment securities, net, at amortized cost	3,832,967	3,860,160
Equity Securities, FV-NI and without Readily Determinable Fair Value	19,571	41,651
FHLB and Federal Reserve Bank stocks, at cost	173,968	229,171
Residential loans held for sale	52,414	33,011
Commercial loans held for sale	0	90,303
Loans	29,494,263	29,216,218
Allowance for loan losses	(356,006)	(351,094)
Tax credit and other investments	255,252	258,067
Premises and equipment, net	367,618	372,978
Goodwill	1,104,992	1,104,992
Other intangible assets, net	38,268	40,471
Mortgage servicing rights, net	85,226	84,390
Interest receivable	167,092	169,569
Other assets	640,638	658,604
Total assets	41,137,084	41,015,855
Liabilities and stockholders' equity
Noninterest-bearing demand deposits	6,254,135	6,119,956
Interest-bearing deposits	27,459,023	27,326,093
Total deposits	33,713,158	33,446,049
Short-Term Debt	765,671	326,780
FHLB advances	1,333,411	1,940,194
Allowance for unfunded commitments	31,776	34,776
Accrued expenses and other liabilities	588,341	552,814
Total liabilities	36,968,412	36,841,882
Stockholders’ equity
Preferred equity	194,112	194,112
Common stock	1,752	1,752
Surplus	1,708,652	1,714,822
Retained earnings	2,991,571	2,946,805
Accumulated other comprehensive (loss)	(209,881)	(171,096)
Treasury stock, at cost	(517,533)	(512,421)
Total common equity	3,974,561	3,979,861
Total stockholders’ equity	4,168,673	4,173,973
Total liabilities and stockholders’ equity	$ 41,137,084	$ 41,015,855
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	175,216,409	175,216,409
Common shares outstanding	150,738,678	151,036,674
Preferred shares, par value	$ 1.00	$ 1.00
Common shares, par value	$ 0.01	$ 0.01
Fair Value, Inputs, Level 1
Assets
Cash and Due from Banks	$ 429,859	$ 484,384
Interest-bearing deposits in other financial institutions	420,114	425,089
Federal funds sold and securities purchased under agreements to resell	1,610	14,350
Fair Value, Inputs, Level 2
Assets
Bank and corporate owned life insurance	685,089	682,649
Liabilities and stockholders' equity
FHLB advances	1,333,411	1,940,194
Other long-term funding	536,055	541,269
Fair Value, Inputs, Level 3
Assets
Loans, net	$ 29,138,257	$ 28,865,124

XML

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Preferred shares, par value	$ 1.00	$ 1.00
Common shares, par value	$ 0.01	$ 0.01

XML

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income
Interest and fees on loans	$ 454,472	$ 391,320
Interest and dividends on investment securities
Taxable	46,548	30,142
Tax-exempt	14,774	16,025
Other interest	7,595	5,329
Total interest income	523,388	442,817
Interest expense
Interest on deposits	226,231	109,422
Interest on federal funds purchased and securities sold under agreements to repurchase	2,863	3,143
Interest on other short-term funding	4,708	0
Interest on FHLB advances	21,671	49,960
Interest on long-term funding	10,058	6,281
Total interest expense	265,530	168,807
Net interest income	257,858	274,010
Provision for credit losses	24,001	17,971
Net interest income after provision for credit losses	233,857	256,039
Noninterest income
Capital markets, net	4,050	5,083
Mortgage banking, net	2,662	3,545
Bank and corporate owned life insurance	2,570	2,664
Asset (losses) gains, net	(306)	263
Investment securities gains, net	3,879	51
Other	2,327	2,422
Noninterest Income, Total	64,985	62,073
Noninterest expense
Personnel	119,395	116,420
Technology	26,200	23,598
Occupancy	13,633	15,063
Business development and advertising	6,517	5,849
Equipment	4,599	4,930
Legal and professional	4,672	3,857
Loan and foreclosure costs	1,979	1,138
FDIC assessment	13,946	6,875
Other intangible amortization	2,203	2,203
Other	4,513	7,479
Total noninterest expense	197,657	187,412
Income before income taxes	101,185	130,700
Income tax expense	20,016	27,340
Net income	81,169	103,360
Preferred stock dividends	2,875	2,875
Net income available to common equity	$ 78,294	$ 100,485
Earnings per common share
Basic	$ 0.52	$ 0.67
Diluted	$ 0.52	$ 0.66
Average common shares outstanding
Basic	149,855	149,763
Diluted	151,292	151,128
Wealth management fees
Noninterest income
Noninterest Income In Scope of Topic 606	$ 21,694	$ 20,189
Service charges and deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606	12,439	12,994
Card-based fees
Noninterest income
Card-based fees	11,267	10,586
Other fee-based revenue
Noninterest income
Card-based fees	$ 4,402	$ 4,276

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 81,169	$ 103,360
AFS investment securities
Net unrealized (losses) gains	(29,889)	36,478
Amortization of net unrealized losses on AFS securities transferred to HTM securities	2,060	2,267
Reclassification adjustment for net losses realized in net income	197	0
Income tax benefit (expense)	6,885	(9,892)
Other comprehensive (loss) income on AFS securities	(20,746)	28,853
Cash flow hedge derivatives
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(19,461)	13,763
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,823	1,262
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(1,688)	(4,694)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(16,326)	10,331
Defined benefit pension and postretirement obligations
Amortization of prior service cost	(72)	(81)
Amortization of actuarial (gain) loss	(7)	30
Income tax (expense) benefit	(1,633)	79
Other comprehensive (loss) income on pension and postretirement obligations	(1,712)	27
Total other comprehensive (loss) income	(38,785)	39,211
Comprehensive income	$ 42,384	$ 142,571

XML

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	Preferred Equity	Common Stock	Surplus	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss)	Treasury Stock, Common	Treasury Stock, Common Board Authorized Purchase Program [Member]	Treasury Stock, Common Performance/Service Based RSAs, RSA,
Beginning balance at Dec. 31, 2022	$ 4,015,490				$ 194,112	$ 1,752	$ 1,712,733	$ 2,904,882	$ (272,799)	$ (525,190)
Comprehensive income:
Net income	103,360							103,360
Net other comprehensive (loss) during period	39,211								39,211
Comprehensive income	142,571
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	1,766						(12,612)	0		14,379
Purchase of treasury stock,	(5,362)											$ (5,362)
Cash dividends:
Common stock	(32,013)							(32,013)
Preferred stock(a)	(2,875)							(2,875)
Stock-based compensation expense, net	6,086						6,086
Ending balance at Mar. 31, 2023	4,125,663				194,112	1,752	1,706,206	2,973,354	(233,588)	(516,173)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625
Beginning balance at Dec. 31, 2023	4,173,973				194,112	1,752	1,714,822	2,946,805	(171,096)	(512,421)
Comprehensive income:
Net income	81,169							81,169
Net other comprehensive (loss) during period	(38,785)								(38,785)
Comprehensive income	42,384
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	3,910						(13,839)			17,749
Purchase of treasury stock,	(4,572)	$ (18,289)									$ (18,289)	$ (4,572)
Cash dividends:
Common stock	(33,527)							(33,527)
Preferred stock(a)	(2,875)							(2,875)
Stock-based compensation expense, net	7,669						7,669
Ending balance at Mar. 31, 2024	$ 4,168,673				$ 194,112	$ 1,752	$ 1,708,652	$ 2,991,571	$ (209,881)	$ (517,533)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Cash flows from operating activities
Net income	$ 81,169	$ 103,360
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	24,001	17,971
Depreciation and amortization	12,352	11,425
Change in MSRs valuation	(1,646)	1,857
Amortization of other intangible assets	2,203	2,203
Amortization and accretion on earning assets, funding, and other, net	10,673	338
Net amortization of tax credit investments	8,990	8,574
(Gains) on sales of investment securities, net	(3,857)	0
Asset losses (gains), net	306	(263)
(Gains) loss on mortgage banking activities, net	(22)	251
Mortgage loans originated and acquired for sale	(105,394)	(69,254)
Proceeds from sales of mortgage loans held for sale	91,026	54,652
Changes in certain assets and liabilities:
Decrease (increase) in interest receivable	2,477	(7,955)
Increase in interest payable	15,590	14,775
(Decrease) in expense payable	(30,827)	(52,396)
Increase (decrease) in net derivative position	35,008	(42,403)
Net change in other assets and other liabilities	12,453	4,336
Net cash provided by operating activities	154,500	47,470
Cash flows from investing activities
Net (increase) in loans	(222,656)	(414,268)
Purchases of:
AFS securities	(341,275)	(681,386)
HTM securities	0	(41,524)
FHLB and Federal Reserve Bank stocks and equity securities	(16,585)	(56,892)
Proceeds from:
Sales of AFS securities	9,472	0
Sale of FHLB and Federal Reserve Bank stocks and equity securities	98,005	15,765
Prepayments, calls, and maturities of AFS securities	176,266	79,746
Prepayments, calls, and maturities of HTM securities	28,026	33,053
Sales, prepayments, calls, and maturities of other assets	4,337	10,115
Premises, equipment, and software	(8,500)	(13,898)
Net change in tax credit and alternative investments	(2,409)	(7,033)
Net cash (used in) investing activities	(275,320)	(1,076,322)
Cash flows from financing activities
Net increase in deposits	267,109	695,723
Net increase (decrease) in short-term funding	438,891	(379,329)
Net (decrease) increase in short-term FHLB advances	(602,000)	660,000
Repayment of long-term FHLB advances	(664)	(507)
Proceeds from long-term FHLB advances	619	115
Proceeds from issuance of long-term funding	0	292,740
(Repayment) of finance lease principal	(22)	(21)
Proceeds from issuance of common stock for stock-based compensation plans	3,910	1,766
Cash dividends on common stock	(33,527)	(32,013)
Cash dividends on preferred stock	(2,875)	(2,875)
Net cash provided by financing activities	48,580	1,230,238
Net (decrease) increase in cash and cash equivalents	(72,239)	201,385
Cash and cash equivalents at beginning of period	923,823	621,455	$ 621,455
Cash and cash equivalents at end of period(a)	851,583	822,840	923,823
Supplemental disclosures of cash flow information
Cash paid for interest	249,660	153,760
Cash paid for income and franchise taxes	1,995	1,086
Loans and bank premises transferred to OREO	577	3,599
Capitalized mortgage servicing rights	877	474	$ 3,564
Loans transferred (from) into held for sale from (into) portfolio, net	(86,096)	94
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(16,326)	10,331
Board Authorized Purchase Program [Member]
Cash flows from financing activities
Purchase of treasury stock, open market purchases	(18,289)	0
Other Assets [Member]
Supplemental disclosures of cash flow information
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	2,708	(341)
Other Liabilities [Member]
Supplemental disclosures of cash flow information
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	10,210	(10,724)
Performance/Service Based RSAs, RSA,
Cash flows from financing activities
Purchase of treasury stock, open market purchases	(4,572)	(5,362)
Retained Earnings [Member]
Cash flows from operating activities
Net income	$ 81,169	$ 103,360

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Basis of Presentation

3 Months Ended

Mar. 31, 2024

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 and Parent Company 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 sum due to the use of rounded numbers for disclosure purposes.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

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 2023 Annual Report on Form 10-K.

New Accounting Pronouncements Adopted

Standard	Description	Date of adoption	Effect on financial statements
ASU 2023-02 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method	The amendments in this update permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. A reporting entity may make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing to apply the proportional amortization method at the reporting entity level or to individual investments. The amendments in this update also remove certain guidance for Qualified Affordable Housing Project investments and require the application of the delayed equity contribution guidance to all tax equity investments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and must be applied on either a modified retrospective or a retrospective basis. Early adoption is permitted in any interim period, however if adopted in an interim period the entity shall adopt the amendments in this update as of the beginning of the fiscal year that includes the interim period.	1st Quarter 2024	The Corporation has determined the impact on its results of operation, financial position, liquidity, and disclosures is immaterial.

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 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures	The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted.	Fiscal year 2024 and interim periods beginning in 1st quarter 2025	The Corporation is currently evaluating the impact on its disclosures.
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures	The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and are to be applied on a prospective basis. Early adoption is permitted.	1st Quarter 2025	The Corporation is currently evaluating the impact on its disclosures.

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Earnings Per Common Share

3 Months Ended

Mar. 31, 2024

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 Mar 31,
($ in thousands, except per share data)	2024		2023
Net income	$	81,169	$	103,360
Preferred stock dividends	(2,875)		(2,875)
Net income available to common equity	$	78,294	$	100,485
Common shareholder dividends	(33,407)		(31,808)
Unvested share-based payment awards	(120)		(205)
Undistributed earnings	$	44,767	$	68,472
Undistributed earnings allocated to common shareholders	$	44,524	$	68,086
Undistributed earnings allocated to unvested share-based payment awards	242		386
Undistributed earnings	$	44,767	$	68,472
Basic
Distributed earnings to common shareholders	$	33,407	$	31,808
Undistributed earnings allocated to common shareholders	44,524		68,086
Total common shareholders earnings, basic	$	77,932	$	99,894
Diluted
Distributed earnings to common shareholders	$	33,407	$	31,808
Undistributed earnings allocated to common shareholders	44,524		68,086
Total common shareholders earnings, diluted	$	77,932	$	99,894
Weighted average common shares outstanding	149,855		149,763
Effect of dilutive common stock awards	1,436		1,365
Diluted weighted average common shares outstanding	151,292		151,128
Basic earnings per common share	$	0.52	$	0.67
Diluted earnings per common share	$	0.52	$	0.66

Approximately 2 million anti-dilutive common stock options were excluded from the earnings per common share calculations for both the three months ended March 31, 2024 and 2023.

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The fair values of stock options and restricted stock awards 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 2017 Incentive Compensation Plan and the 2020 Incentive Compensation Plan, expenses related to stock options and restricted stock awards 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 three months ended March 31, 2024 is presented below:

Stock Options	Shares(a)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value(a)
Outstanding at December 31, 2023	3,792	$	21.25	4.26 years	$	5,834
Exercised	179	17.27
Outstanding at March 31, 2024	3,613	$	21.45	4.08 years	$	5,299
Options Exercisable at March 31, 2024	3,613	$	21.45	4.08 years	$	5,299

(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 three months ended March 31, 2024, the intrinsic value of stock options exercised was approximately $722,000, compared to approximately $219,000 for the three months ended March 31, 2023. For the three months ended March 31, 2024, the total fair value of stock options vested was approximately $489,000 compared to approximately $955,000 for the three months ended March 31, 2023.

The Corporation also has issued time-based and performance-based restricted stock awards under the 2017 Incentive Compensation Plan and subsequent 2020 Incentive Compensation Plan. Performance 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 awards activity for the three months ended March 31, 2024:

Restricted Stock	Shares(a)	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2023	2,349	$	21.20
Granted	802	21.00
Vested	631	24.39
Forfeited	4	22.05
Outstanding at March 31, 2024	2,516	$	21.33

(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 awards granted during 2023 and 2024 will cliff-vest after the three year performance period has ended. Service-based restricted stock awards granted during 2023 and 2024 will generally vest ratably over a period of four years. Expense for restricted stock awards of $8 million was recorded for the three months ended March 31, 2024, compared to $6 million for the three months ended March 31, 2023. Included in compensation expense for the first three months of 2024 was $3 million of expense for the accelerated vesting of restricted stock awards granted to retirement eligible colleagues. The Corporation had $30 million of unrecognized compensation costs related to restricted stock awards at March 31, 2024 that are expected to be recognized over the remaining requisite service periods that extend predominately through the first quarter of 2028.

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 awards. 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

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Investment Securities

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 March 31, 2024 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,985	$	—	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	83,823		1		(2,995)		80,830
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		221		(156,880)		1,090,998
GNMA	2,219,058		6,114		(10,658)		2,214,513
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		—		(1,595)		17,008
GNMA	159,523		—		(7,291)		152,232
Asset backed securities:
FFELP	130,196		22		(1,065)		129,154
SBA	916		1		(28)		890
Other debt securities	3,000		—		(35)		2,965
Total AFS investment securities	$	3,902,762	$	6,359	$	(184,973)	$	3,724,148
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	1,676,275		2,292		(154,833)		1,523,734
Residential mortgage-related securities:
FNMA/FHLMC	930,148		26,023		(184,227)		771,944
GNMA	48,043		24		(3,609)		44,457
Private-label	341,153		9,399		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		12,068		(162,450)		628,928
GNMA	57,114		338		(7,270)		50,183
Total HTM investment securities	$	3,833,043	$	50,145	$	(581,903)	$	3,301,284

The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,984	$	—	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	94,008		23		(2,214)		91,817
Residential mortgage-related securities:
FNMA/FHLMC	1,274,052		294		(153,552)		1,120,794
GNMA	2,021,242		24,254		(2,822)		2,042,675
Commercial mortgage-related securities:
FNMA/FHLMC	18,691		—		(1,755)		16,937
GNMA	161,928		—		(7,135)		154,793
Asset backed securities:
FFELP	135,832		5		(1,862)		133,975
SBA	1,077		2		(28)		1,051
Other debt securities	3,000		—		(50)		2,950
Total AFS investment securities	$	3,749,814	$	24,579	$	(173,501)	$	3,600,892
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	1,682,473		5,638		(134,053)		1,554,059
Residential mortgage-related securities:
FNMA/FHLMC	941,973		27,007		(164,587)		804,393
GNMA	48,979		92		(2,901)		46,170
Private-label	345,083		9,796		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		12,699		(160,781)		632,914
GNMA	59,733		386		(7,500)		52,619
Total HTM investment securities	$	3,860,235	$	55,619	$	(535,230)	$	3,380,624

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 March 31, 2024, are shown below:

	AFS					HTM
($ in thousands)	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Due in one year or less	$	1,915	$	1,902		$	11,061	$	11,011
Due after one year through five years	47,142		42,470			58,092		57,522
Due after five years through ten years	50,863		48,613			166,954		162,309
Due after ten years	26,888		26,368			1,441,167		1,293,862
Total debt securities	126,808		119,353			1,677,274		1,524,703
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		1,090,998			930,148		771,944
GNMA	2,219,058		2,214,513			48,043		44,457
Private-label	—		—			341,153		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		17,008			779,310		628,928
GNMA	159,523		152,232			57,114		50,183
Asset backed securities:
FFELP	130,196		129,154			—		—
SBA	916		890			—		—
Total investment securities	$	3,902,762	$	3,724,148		$	3,833,043	$	3,301,284
Ratio of fair value to amortized cost			95.4		%			86.1		%

On a quarterly basis, the Corporation refreshes the credit quality of each HTM security. The following table summarizes the credit quality indicators of HTM securities at amortized cost at March 31, 2024:

($ in thousands)	AAA		AA		A		Not Rated		Total
U.S. Treasury securities	$	999	$	—	$	—	$	—	$	999
Obligations of state and political subdivisions (municipal securities)	768,220		901,215		5,685		1,154		1,676,275
Residential mortgage-related securities:
FNMA/FHLMC	930,148		—		—		—		930,148
GNMA	48,043		—		—		—		48,043
Private-label	341,153		—		—		—		341,153
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		—		—		—		779,310
GNMA	57,114		—		—		—		57,114
Total HTM securities	$	2,924,988	$	901,215	$	5,685	$	1,154	$	3,833,043

The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2023:

($ in thousands)	AAA		AA		A		Not Rated		Total
U.S. Treasury securities	$	999	$	—	$	—	$	—	$	999
Obligations of state and political subdivisions (municipal securities)	760,329		915,303		5,687		1,155		1,682,473
Residential mortgage-related securities:
FNMA/FHLMC	941,973		—		—		—		941,973
GNMA	48,979		—		—		—		48,979
Private-label	345,083		—		—		—		345,083
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		—		—		—		780,995
GNMA	59,733		—		—		—		59,733
Total HTM securities	$	2,938,090	$	915,303	$	5,687	$	1,155	$	3,860,235

The following table summarizes gross realized gains and losses on AFS securities, the gain on sale and net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three months ended March 31, 2024 and 2023:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Gross realized (losses) on AFS securities	$	(197)	$	—
Gain on sale and net write-up (down) of equity securities	4,076		51
Investment securities gains (losses), net	$	3,879	$	51
Proceeds from sales of AFS investment securities	$	9,472	$	—

During the first quarter of 2024, the Corporation sold its remaining Visa Class B restricted shares at a gain of $4 million.

Investment securities with a carrying value of $1.5 billion and $1.6 billion at March 31, 2024 and December 31, 2023, respectively, were pledged as required to secure certain deposits or for other purposes.

Accrued interest receivable on HTM securities totaled $16 million and $18 million at March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable on AFS securities totaled $16 million and $15 million at March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets.

The allowance for credit losses on HTM securities was approximately $76,000 at March 31, 2024 and approximately $75,000 at December 31, 2023, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The Corporation also 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 15% of losses and, as a result, no allowance for credit losses has been recorded related to these securities.

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 March 31, 2024:

	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
U.S. Treasury securities	—	$	—	$	—	1	$	(4,427)	$	35,558	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	27	(218)		13,847		108	(2,777)		64,217		(2,995)		78,064
Residential mortgage-related securities:
FNMA/FHLMC	24	(694)		31,375		71	(156,185)		1,045,343		(156,880)		1,076,718
GNMA	59	(7,016)		1,122,930		10	(3,643)		105,462		(10,658)		1,228,391
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,595)		17,008		(1,595)		17,008
GNMA	1	(337)		13,668		30	(6,954)		138,564		(7,291)		152,232
Asset backed securities:
FFELP	2	(116)		40,177		12	(949)		75,411		(1,065)		115,588
SBA	—	—		—		5	(28)		677		(28)		677
Other debt securities	1	(7)		993		2	(28)		1,972		(35)		2,965
Total	114	$	(8,388)	$	1,222,990	240	$	(176,585)	$	1,484,212	$	(184,973)	$	2,707,201
HTM investment securities
U.S. Treasury securities	—	$	—	$	—	1	$	(30)	$	969	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	287	(2,536)		324,576		653	(152,297)		916,225		(154,833)		1,240,801
Residential mortgage-related securities:
FNMA/FHLMC	5	(40)		3,489		113	(184,186)		768,182		(184,227)		771,671
GNMA	6	(99)		8,674		79	(3,511)		34,346		(3,609)		43,020
Private-label	—	—		—		18	(69,484)		281,069		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	1	(263)		8,003		44	(162,187)		620,926		(162,450)		628,928
GNMA	—	—		—		13	(7,270)		50,183		(7,270)		50,183
Total	299	$	(2,938)	$	344,741	921	$	(578,965)	$	2,671,899	$	(581,903)	$	3,016,640

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, 2023:

	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
U.S. Treasury securities	—	$	—	$	—	1	$	(4,083)	$	35,902	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	41	(347)		23,762		92	(1,867)		53,022		(2,214)		76,784
Residential mortgage-related securities:
FNMA/FHLMC	18	(333)		22,870		71	(153,219)		1,080,337		(153,552)		1,103,207
GNMA	13	(924)		156,847		5	(1,898)		26,643		(2,822)		183,490
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,755)		16,937		(1,755)		16,937
GNMA	9	(3,160)		103,055		22	(3,975)		51,738		(7,135)		154,793
Asset backed securities:
FFELP	—	—		—		14	(1,862)		125,339		(1,862)		125,339
SBA	—	—		—		5	(28)		761		(28)		761
Other debt securities	1	(9)		991		2	(42)		1,958		(50)		2,950
Total	82	$	(4,773)	$	307,527	213	$	(168,728)	$	1,392,635	$	(173,501)	$	1,700,162
HTM investment securities
U.S. Treasury securities	—	$	—	$	—	1	$	(36)	$	963	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	182	(1,535)		180,270		537	(132,518)		792,940		(134,053)		973,210
Residential mortgage-related securities:
FNMA/FHLMC	20	(511)		30,323		94	(164,076)		771,042		(164,587)		801,365
GNMA	2	(17)		2,128		78	(2,884)		34,626		(2,901)		36,754
Private-label	—	—		—		18	(65,372)		289,507		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	1	(121)		8,144		44	(160,660)		624,770		(160,781)		632,914
GNMA	—	—		—		13	(7,500)		52,619		(7,500)		52,619
Total	205	$	(2,184)	$	220,865	785	$	(533,046)	$	2,566,468	$	(535,230)	$	2,787,333

The Corporation reviews the AFS investment securities portfolio on a quarterly basis to monitor its credit exposure. A determination as to whether a security’s decline in fair value is the result of credit risk takes into consideration numerous factors and the relative significance of any single factor can vary by security. Some factors the Corporation may consider in this impairment analysis include the extent to which the security has been in an unrealized loss position, the change in security rating, financial condition and near-term prospects of the issuer, as well as the security and industry specific economic conditions.

Based on the Corporation’s evaluation, management does not believe any unrealized losses at March 31, 2024 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions. As of March 31, 2024, 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.

FHLB and Federal Reserve Bank stocks: The Corporation is required to maintain Federal Reserve Bank stock and FHLB stock as a member bank of both the Federal Reserve System and the FHLB, and in amounts as required by these institutions. These equity securities are “restricted” in that they can only be sold back to the respective institutions or another member institution at par. Therefore, they are less liquid than other marketable equity securities and their fair value is equal to amortized cost. The Corporation had FHLB stock of $86 million and $143 million at March 31, 2024 and December 31, 2023, respectively. The Corporation had Federal Reserve Bank stock of $88 million and $87 million at March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable on FHLB stock totaled $2 million and $4 million at March 31, 2024 and December 31, 2023, respectively. There was approximately $921,000 of accrued interest receivable on Federal Reserve Bank Stock at March 31, 2024 and none at December 31, 2023. 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 CRA Qualified Investment mutual funds and other mutual funds. The Corporation had equity securities with readily determinable fair values of $7 million at both March 31, 2024 and December 31, 2023.

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 $13 million and $35 million at March 31, 2024 and December 31, 2023, respectively. During the first quarter of 2024, the Corporation sold all of its remaining Visa Class B restricted shares.

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Loans

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

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

Loans

The period end loan composition was as follows:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commercial and industrial	$	9,858,329	$	9,731,555
Commercial real estate — owner occupied	1,095,894		1,061,700
Commercial and business lending	10,954,223		10,793,255
Commercial real estate — investor	5,035,195		5,124,245
Real estate construction	2,287,041		2,271,398
Commercial real estate lending	7,322,237		7,395,644
Total commercial	18,276,460		18,188,898
Residential mortgage	7,868,180		7,864,891
Auto finance	2,471,257		2,256,162
Home equity	619,764		628,526
Other consumer	258,603		277,740
Total consumer	11,217,802		11,027,319
Total loans	$	29,494,263	$	29,216,218

Accrued interest receivable on loans totaled $133 million at March 31, 2024, and $132 million at December 31, 2023, and is included in interest receivable on the consolidated balance sheets. Interest accrued but not received is reversed against interest income when a loan is placed on nonaccrual.

The following table presents loans by credit quality indicator by origination year at March 31, 2024:

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	279	$	1,732,197	$	318,587	$	1,758,151	$	2,806,636	$	1,701,638	$	380,164	$	774,950	$	9,472,322
Special mention	—		14,287		—		13,305		24,216		27,909		3,392		865		83,973
Substandard	434		23,288		44,013		2,283		82,394		59,491		17,184		1,138		229,791
Nonaccrual	3,157		—		2,938		12,629		14,495		17,599		—		24,582		72,243
Commercial and industrial	$	3,869	$	1,769,772	$	365,538	$	1,786,369	$	2,927,740	$	1,806,637	$	400,739	$	801,535	$	9,858,329
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	11,455	$	56,257	$	196,065	$	191,357	$	234,852	$	133,883	$	218,224	$	1,042,093
Special mention	—		94		—		—		—		—		—		—		94
Substandard	—		950		2,667		18,003		2,083		12,376		8,423		7,114		51,616
Nonaccrual	—		—		722		1,368		—		—		—		—		2,090
Commercial real estate - owner occupied	$	—	$	12,500	$	59,646	$	215,436	$	193,440	$	247,228	$	142,306	$	225,339	$	1,095,894
Commercial and business lending:
Risk rating:
Pass	$	279	$	1,743,652	$	374,844	$	1,954,216	$	2,997,992	$	1,936,490	$	514,047	$	993,174	$	10,514,415
Special mention	—		14,381		—		13,305		24,216		27,909		3,392		865		84,068
Substandard	434		24,239		46,680		20,286		84,477		71,867		25,606		8,252		281,408
Nonaccrual	3,157		—		3,659		13,997		14,495		17,599		—		24,582		74,333
Commercial and business lending	$	3,869	$	1,782,272	$	425,184	$	2,001,805	$	3,121,180	$	2,053,865	$	543,045	$	1,026,873	$	10,954,223
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	131,383	$	196,066	$	1,162,643	$	1,274,328	$	1,014,759	$	418,534	$	550,600	$	4,748,313
Special mention	—		502		—		—		22,494		9,238		—		35,614		67,848
Substandard	—		—		38,662		94,918		33,540		25,949		975		6,293		200,338
Nonaccrual	—		—		—		—		—		—		—		18,697		18,697
Commercial real estate - investor	$	—	$	131,886	$	234,727	$	1,257,561	$	1,330,362	$	1,049,946	$	419,509	$	611,204	$	5,035,195
Real estate construction:
Risk rating:
Pass	$	—	$	24,266	$	58,519	$	474,768	$	1,177,598	$	494,047	$	45,034	$	12,792	$	2,287,023
Nonaccrual	—		—		—		—		—		—		—		18		18
Real estate construction	$	—	$	24,266	$	58,519	$	474,768	$	1,177,598	$	494,047	$	45,034	$	12,810	$	2,287,041
Commercial real estate lending:
Risk rating:
Pass	$	—	$	155,649	$	254,585	$	1,637,410	$	2,451,926	$	1,508,806	$	463,568	$	563,392	$	7,035,336
Special mention	—		502		—		—		22,494		9,238		—		35,614		67,848
Substandard	—		—		38,662		94,918		33,540		25,949		975		6,293		200,338
Nonaccrual	—		—		—		—		—		—		—		18,715		18,715
Commercial real estate lending	$	—	$	156,151	$	293,246	$	1,732,329	$	2,507,960	$	1,543,993	$	464,543	$	624,014	$	7,322,237
Total commercial:
Risk rating:
Pass	$	279	$	1,899,301	$	629,429	$	3,591,627	$	5,449,918	$	3,445,296	$	977,615	$	1,556,566	$	17,549,751
Special mention	—		14,883		—		13,305		46,710		37,146		3,392		36,480		151,916
Substandard	434		24,239		85,342		115,205		118,017		97,816		26,582		14,545		481,745
Nonaccrual	3,157		—		3,659		13,997		14,495		17,599		—		43,297		93,047
Total commercial	$	3,869	$	1,938,423	$	718,430	$	3,734,133	$	5,629,140	$	3,597,858	$	1,007,588	$	1,650,888	$	18,276,460

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	23,550	$	396,223	$	1,657,013	$	2,086,129	$	1,389,566	$	2,244,891	$	7,797,372
Special mention	—		—		—		—		—		—		—		94		94
Substandard	—		—		—		467		92		—		—		199		759
Nonaccrual	—		—		877		1,264		10,501		9,712		8,575		39,026		69,954
Residential mortgage	$	—	$	—	$	24,427	$	397,954	$	1,667,606	$	2,095,841	$	1,398,141	$	2,284,210	$	7,868,180
Auto finance:
Risk rating:
Pass	$	—	$	—	$	384,126	$	1,133,964	$	874,922	$	68,423	$	137	$	352	$	2,461,925
Special mention	—		—		—		634		1,398		117		—		—		2,148
Substandard	—		—		—		26		—		—		—		—		26
Nonaccrual	—		—		21		1,682		4,898		554		—		2		7,158
Auto finance	$	—	$	—	$	384,147	$	1,136,306	$	881,218	$	69,094	$	137	$	354	$	2,471,257
Home equity:
Risk rating:
Pass	$	3,830	$	514,998	$	21	$	1,508	$	29,539	$	5,949	$	2,278	$	56,995	$	611,286
Special mention	17		53		—		46		38		—		—		175		312
Substandard	—		—		—		9		—		—		—		56		65
Nonaccrual	505		76		31		—		671		141		120		7,061		8,100
Home equity	$	4,352	$	515,127	$	51	$	1,563	$	30,248	$	6,090	$	2,398	$	64,286	$	619,764
Other consumer:
Risk rating:
Pass	$	75	$	186,540	$	1,489	$	4,995	$	2,823	$	1,474	$	781	$	57,722	$	255,824
Special mention	3		850		—		14		24		6		7		3		904
Substandard	—		1,788		—		—		—		—		—		—		1,788
Nonaccrual	4		61		—		9		7		—		—		11		87
Other consumer	$	82	$	189,238	$	1,489	$	5,018	$	2,854	$	1,480	$	788	$	57,735	$	258,603
Total consumer:
Risk rating:
Pass	$	3,905	$	701,538	$	409,186	$	1,536,690	$	2,564,297	$	2,161,975	$	1,392,762	$	2,359,959	$	11,126,407
Special mention	20		904		—		694		1,459		123		7		272		3,459
Substandard	—		1,788		—		502		92		—		—		255		2,637
Nonaccrual	509		137		928		2,955		16,077		10,407		8,695		46,100		85,299
Total consumer	$	4,434	$	704,365	$	410,115	$	1,540,841	$	2,581,926	$	2,172,506	$	1,401,464	$	2,406,586	$	11,217,802
Total loans:
Risk rating:
Pass	$	4,184	$	2,600,839	$	1,038,615	$	5,128,316	$	8,014,215	$	5,607,272	$	2,370,376	$	3,916,525	$	28,676,159
Special mention	20		15,787		—		13,999		48,169		37,270		3,399		36,752		155,375
Substandard	434		26,026		85,342		115,707		118,109		97,816		26,582		14,800		484,383
Nonaccrual	3,666		137		4,588		16,952		30,572		28,007		8,695		89,396		178,346
Total loans	$	8,303	$	2,642,788	$	1,128,545	$	5,274,974	$	8,211,066	$	5,770,365	$	2,409,052	$	4,057,474	$	29,494,263

(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, 2023:

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	1,380	$	1,693,249	$	1,736,617	$	2,877,173	$	1,824,362	$	398,046	$	383,695	$	449,006	$	9,362,149
Special mention	—		21,779		4,017		46,610		8,525		3,529		—		25,341		109,801
Substandard	804		81,924		10,515		39,748		47,279		17,732		94		291		197,582
Nonaccrual	6,414		—		13,317		14,188		33,891		627		—		—		62,022
Commercial and industrial	$	8,598	$	1,796,951	$	1,764,466	$	2,977,719	$	1,914,057	$	419,934	$	383,789	$	474,638	$	9,731,555
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	15,393	$	204,039	$	188,003	$	239,218	$	136,535	$	135,730	$	92,339	$	1,011,259
Special mention	—		271		—		—		6,150		2,635		—		1,293		10,349
Substandard	—		292		14,735		2,791		6,416		8,537		3,086		2,841		38,699
Nonaccrual	—		—		1,394		—		—		—		—		—		1,394
Commercial real estate - owner occupied	$	—	$	15,957	$	220,168	$	190,794	$	251,783	$	147,708	$	138,816	$	96,473	$	1,061,700
Commercial and business lending:
Risk rating:
Pass	$	1,380	$	1,708,642	$	1,940,657	$	3,065,177	$	2,063,580	$	534,581	$	519,426	$	541,345	$	10,373,408
Special mention	—		22,050		4,017		46,610		14,675		6,164		—		26,634		120,150
Substandard	804		82,216		25,250		42,539		53,695		26,269		3,180		3,132		236,281
Nonaccrual	6,414		—		14,710		14,188		33,891		627		—		—		63,416
Commercial and business lending	$	8,598	$	1,812,909	$	1,984,635	$	3,168,514	$	2,165,840	$	567,642	$	522,606	$	571,111	$	10,793,255
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	155,109	$	1,263,866	$	1,247,434	$	1,080,425	$	471,371	$	358,996	$	239,230	$	4,816,433
Special mention	—		502		4,248		25,474		26,208		—		29,772		6,014		92,218
Substandard	—		—		106,002		69,584		15,000		983		—		24,025		215,595
Commercial real estate - investor	$	—	$	155,611	$	1,374,116	$	1,342,492	$	1,121,633	$	472,355	$	388,768	$	269,269	$	5,124,245
Real estate construction:
Risk rating:
Pass	$	—	$	23,307	$	422,277	$	1,176,608	$	547,825	$	87,680	$	5,740	$	7,954	$	2,271,392
Nonaccrual	—		—		—		—		—		—		—		6		6
Real estate construction	$	—	$	23,307	$	422,277	$	1,176,608	$	547,825	$	87,680	$	5,740	$	7,960	$	2,271,398
Commercial real estate lending:
Risk rating:
Pass	$	—	$	178,416	$	1,686,143	$	2,424,042	$	1,628,250	$	559,052	$	364,737	$	247,184	$	7,087,824
Special mention	—		502		4,248		25,474		26,208		—		29,772		6,014		92,218
Substandard	—		—		106,002		69,584		15,000		983		—		24,025		215,595
Nonaccrual	—		—		—		—		—		—		—		6		6
Commercial real estate lending	$	—	$	178,918	$	1,796,393	$	2,519,100	$	1,669,458	$	560,035	$	394,508	$	277,230	$	7,395,644

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Total commercial:
Risk rating:
Pass	$	1,380	$	1,887,058	$	3,626,800	$	5,489,219	$	3,691,830	$	1,093,633	$	884,162	$	788,529	$	17,461,232
Special mention	—		22,552		8,265		72,084		40,882		6,164		29,772		32,648		212,368
Substandard	804		82,216		131,253		112,123		68,695		27,253		3,180		27,157		451,876
Nonaccrual	6,414		—		14,710		14,188		33,891		627		—		6		63,422
Total commercial	$	8,598	$	1,991,827	$	3,781,028	$	5,687,614	$	3,835,298	$	1,127,677	$	917,114	$	848,341	$	18,188,898
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	352,321	$	1,617,409	$	2,110,577	$	1,414,186	$	647,778	$	1,650,542	$	7,792,813
Special mention	—		—		—		—		—		—		95		57		152
Substandard	—		—		490		93		—		—		174		26		784
Nonaccrual	—		—		1,425		9,567		9,259		10,397		6,628		33,865		71,142
Residential mortgage	$	—	$	—	$	354,236	$	1,627,070	$	2,119,836	$	1,424,583	$	654,675	$	1,684,490	$	7,864,891
Auto finance:
Risk rating:
Pass	$	—	$	—	$	1,218,820	$	952,839	$	75,209	$	163	$	456	$	132	$	2,247,618
Special mention	—		—		619		1,850		205		—		—		—		2,674
Substandard	—		—		—		73		—		—		—		—		73
Nonaccrual	—		—		1,032		4,332		430		—		3		—		5,797
Auto finance	$	—	$	—	$	1,220,471	$	959,094	$	75,844	$	163	$	458	$	132	$	2,256,162
Home equity:
Risk rating:
Pass	$	8,703	$	521,000	$	1,678	$	29,863	$	6,084	$	2,327	$	4,891	$	53,350	$	619,192
Special mention	179		200		—		87		—		29		15		378		708
Substandard	10		75		10		—		—		—		33		—		118
Nonaccrual	1,302		160		29		495		132		144		368		7,180		8,508
Home equity	$	10,195	$	521,434	$	1,717	$	30,445	$	6,217	$	2,500	$	5,308	$	60,907	$	628,526
Other consumer:
Risk rating:
Pass	$	121	$	196,632	$	6,419	$	3,732	$	2,658	$	1,127	$	460	$	64,121	$	275,149
Special mention	26		843		9		—		3		20		—		6		881
Substandard	—		1,582		—		—		—		—		—		—		1,582
Nonaccrual	27		71		10		1		6		2		8		29		128
Other consumer	$	174	$	199,129	$	6,438	$	3,733	$	2,668	$	1,149	$	468	$	64,156	$	277,740
Total consumer:
Risk rating:
Pass	$	8,824	$	717,632	$	1,579,238	$	2,603,843	$	2,194,529	$	1,417,802	$	653,584	$	1,768,145	$	10,934,773
Special mention	205		1,043		628		1,936		208		49		110		441		4,416
Substandard	10		1,656		500		166		—		—		207		26		2,556
Nonaccrual	1,330		231		2,496		14,396		9,827		10,544		7,007		41,073		85,574
Total consumer	$	10,369	$	720,563	$	1,582,862	$	2,620,341	$	2,204,564	$	1,428,395	$	660,909	$	1,809,685	$	11,027,319
Total loans:
Risk rating:
Pass	$	10,204	$	2,604,690	$	5,206,038	$	8,093,062	$	5,886,359	$	2,511,435	$	1,537,747	$	2,556,674	$	28,396,005
Special mention	205		23,595		8,893		74,020		41,091		6,213		29,882		33,089		216,784
Substandard	814		83,872		131,753		112,289		68,695		27,253		3,387		27,183		454,432
Nonaccrual	7,744		231		17,206		28,584		43,718		11,170		7,007		41,080		148,997
Total loans	$	18,966	$	2,712,389	$	5,363,890	$	8,307,956	$	6,039,862	$	2,556,071	$	1,578,023	$	2,658,026	$	29,216,218

(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 three months ended March 31, 2024:

			Gross Charge Offs by Origination Year
($ in thousands)	Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Commercial and industrial	$	1,024	$	—	$	125	$	553	$	17,724	$	3	$	—	$	19,429
Commercial real estate-owner occupied	—		—		—		—		—		—		3		3
Commercial and business lending	1,024		—		125		553		17,724		3		3		19,432
Total commercial	1,024		—		125		553		17,724		3		3		19,432
Residential mortgage	—		—		40		—		—		2		47		89
Auto finance	—		—		767		1,675		158		—		—		2,600
Home equity	93		—		—		—		—		—		15		108
Other consumer	1,688		—		15		8		17		28		34		1,790
Total consumer	1,782		—		822		1,683		175		30		95		4,586
Total gross charge offs	$	2,806	$	—	$	947	$	2,236	$	17,899	$	33	$	98	$	24,018

The following table presents gross charge offs by origination year for the year ended December 31, 2023:

			Gross Charge Offs by Origination Year
($ in thousands)	Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Commercial and industrial	$	4,130	$	717	$	9,594	$	25,270	$	5,958	$	—	$	18	$	45,687
Commercial real estate-owner occupied	—		—		—		—		—		25		—		25
Commercial and business lending	4,130		717		9,594		25,270		5,958		25		18		45,713
Commercial real estate-investor	—		—		—		—		—		—		252		252
Real estate construction	—		—		—		—		—		—		25		25
Commercial real estate lending	—		—		—		—		—		—		277		277
Total commercial	4,130		717		9,594		25,270		5,958		25		295		45,989
Residential mortgage	—		2		32		42		148		5		723		952
Auto finance	—		795		4,524		626		—		5		—		5,950
Home equity	53		21		3		31		—		22		294		424
Other consumer	4,884		—		72		124		131		72		170		5,453
Total consumer	4,937		818		4,630		823		279		105		1,187		12,779
Total gross charge offs	$	9,068	$	1,535	$	14,224	$	26,093	$	6,237	$	130	$	1,482	$	58,768

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 warrant specific attention from management. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit. 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 net worth and paying capacity of the obligor or the collateral pledged. These loans generally 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. Management has determined commercial loan relationships in nonaccrual status, and commercial and consumer loan relationships with their terms restructured in a loan modification, meet the criteria to be individually evaluated. 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 following table presents loans by past due status at March 31, 2024:

	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	$	9,785,140	$	371	$	150	$	426	$	72,243	$	9,858,329
Commercial real estate - owner occupied	1,093,804		—		—		—		2,090		1,095,894
Commercial and business lending	10,878,944		371		150		426		74,333		10,954,223
Commercial real estate - investor	4,997,335		—		19,164		—		18,697		5,035,195
Real estate construction	2,285,763		1,260		—		—		18		2,287,041
Commercial real estate lending	7,283,098		1,260		19,164		—		18,715		7,322,237
Total commercial	18,162,042		1,631		19,314		426		93,047		18,276,460
Residential mortgage	7,788,322		9,808		94		—		69,954		7,868,180
Auto finance	2,451,552		10,373		2,148		26		7,158		2,471,257
Home equity	608,821		2,506		312		24		8,100		619,764
Other consumer	254,313		1,298		963		1,942		87		258,603
Total consumer	11,103,009		23,985		3,517		1,992		85,299		11,217,802
Total loans	$	29,265,051	$	25,617	$	22,831	$	2,417	$	178,346	$	29,494,263

(a) Of the total nonaccrual loans, $98 million, or 55%, were current with respect to payment at March 31, 2024.

(b) No interest income was recognized on nonaccrual loans for the three months ended March 31, 2024. In addition, there were $20 million of nonaccrual loans for which there was no related ACLL at March 31, 2024.

The following table presents loans by past due status at December 31, 2023:

	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	$	9,663,587	$	5,374	$	191	$	380	$	62,022	$	9,731,555
Commercial real estate - owner occupied	1,059,948		—		358		—		1,394		1,061,700
Commercial and business lending	10,723,536		5,374		549		380		63,416		10,793,255
Commercial real estate - investor	5,086,117		—		18,697		19,432		—		5,124,245
Real estate construction	2,271,392		—		—		—		6		2,271,398
Commercial real estate lending	7,357,509		—		18,697		19,432		6		7,395,644
Total commercial	18,081,044		5,374		19,246		19,812		63,422		18,188,898
Residential mortgage	7,780,304		13,294		152		—		71,142		7,864,891
Auto finance	2,232,906		14,712		2,674		73		5,797		2,256,162
Home equity	615,810		3,500		708		—		8,508		628,526
Other consumer	273,644		1,233		932		1,803		128		277,740
Total consumer	10,902,664		32,739		4,467		1,876		85,574		11,027,319
Total loans	$	28,983,708	$	38,113	$	23,712	$	21,689	$	148,997	$	29,216,218

(a) Of the total nonaccrual loans, $80 million, or 53%, were current with respect to payment at December 31, 2023.

(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2023. In addition, there were $23 million of nonaccrual loans for which there was no related ACLL at December 31, 2023.

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 during the three months ended March 31, 2024 and March 31, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at March 31, 2024.

	Interest Rate Concession
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Commercial and industrial	$	159	$	47
Auto	46		61
Home equity	—		31
Other consumer	534		498
Total loans modified	$	739	$	637

	Term Extension
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Residential mortgage	$	—	$	209
Total loans modified	$	—	$	209

	Combination - Interest Rate Concession and Term Extension
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Residential mortgage	$	643	$	165
Home equity	31		93
Total loans modified	$	674	$	258

The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans as of March 31, 2024 and March 31, 2023:

	Interest Rate Concession
	Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
Loan Type	March 31, 2024		March 31, 2023
Commercial and industrial	(16)	%	(16)	%
Residential mortgage	3	%	—	%
Auto	(9)	%	(2)	%
Home equity	(3)	%	1	%
Other consumer	(21)	%	(20)	%
Weighted average of total loans modified	(9)	%	(17)	%

(a) Due to market conditions, some interest rate concessions on floating rate loans may involve an increase in rate that was lower in comparison to the rate of increase for floating rate loans not modified.

	Term Extension
	Financial Effect, Weighted Average Term Increase(a)
Loan Type	March 31, 2024	March 31, 2023
Residential mortgage	158 months	26 months
Home equity	64 months	0 months
Weighted average of total loans modified	153 months	26 months

(a) During the three months ended March 31, 2024 and March 31, 2023, term extensions changed the weighted average term on modified loans from 254 to 407 months and 334 to 360 months, 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 March 31, 2024:

	Payment Status (Amortized Cost Basis)
($ in thousands)	Current		30-89 Days Past Due		90+ Days Past Due		Nonaccrual
Commercial and industrial	$	377	$	—	$	—	$	—
Residential mortgage	345		—		—		991
Auto	63		3		—		11
Home equity	135		47		—		139
Other consumer	1,487		—		—		—
Total loans modified	$	2,407	$	50	$	—	$	1,141

The following table depicts the performance of loans that have been modified in the three months ended March 31, 2023:

	Payment Status (Amortized Cost Basis)
($ in thousands)	Current		30-89 Days Past Due		90+ Days Past Due		Nonaccrual
Commercial and industrial	$	47	$	—	$	—	$	—
Residential mortgage	126		—		—		248
Auto	61		—		—		—
Home equity	31		—		—		93
Other consumer	498		—		—		—
Total loans modified	$	763	$	—	$	—	$	341

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous twelve months and subsequently had a payment default during the three months ended March 31, 2024:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
($ in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Auto	$	11	$	—	$	—
Total loans modified	$	11	$	—	$	—

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous three months and subsequently had a payment default during the three months ended March 31, 2023:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
($ in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Home equity	$	—	$	—	$	60
Total loans modified	$	—	$	—	$	60

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 March 31, 2024 was the Moody's baseline scenario from February 2024, which was reviewed against the March 2024 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 11 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 three months ended March 31, 2024:

($ in thousands)	Dec 31, 2023		Charge offs		Recoveries		Net Charge offs		Provision for credit losses		Mar 31, 2024		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	128,263	$	(19,429)	$	791	$	(18,638)	$	23,202	$	132,826
Commercial real estate — owner occupied	10,610		(3)		5		2		1,768		12,381
Commercial and business lending	138,873		(19,432)		796		(18,636)		24,970		145,207
Commercial real estate — investor	67,858		—		—		—		4,137		71,995
Real estate construction	53,554		—		30		30		(4,281)		49,303
Commercial real estate lending	121,412		—		30		30		(144)		121,298
Total commercial	260,285		(19,432)		826		(18,606)		24,826		266,506
Residential mortgage	37,808		(89)		27		(62)		(1,831)		35,915
Auto finance	24,961		(2,600)		506		(2,094)		3,248		26,114
Home equity	15,403		(108)		319		211		(874)		14,740
Other consumer	12,638		(1,790)		252		(1,537)		1,630		12,731
Total consumer	90,809		(4,586)		1,104		(3,482)		2,174		89,501
Total loans	$	351,094	$	(24,018)	$	1,930	$	(22,088)	$	27,000	$	356,006
Allowance for unfunded commitments
Commercial and industrial	$	13,319	$	—	$	—	$	—	$	(757)	$	12,562
Commercial real estate — owner occupied	149		—		—		—		15		164
Commercial and business lending	13,468		—		—		—		(742)		12,725
Commercial real estate — investor	480		—		—		—		37		517
Real estate construction	17,024		—		—		—		(2,103)		14,921
Commercial real estate lending	17,504		—		—		—		(2,066)		15,438
Total commercial	30,972		—		—		—		(2,808)		28,164
Home equity	2,629		—		—		—		(316)		2,313
Other consumer	1,174		—		—		—		124		1,298
Total consumer	3,803		—		—		—		(192)		3,612
Total loans	$	34,776	$	—	$	—	$	—	$	(3,000)	$	31,776
Allowance for credit losses on loans
Commercial and industrial	$	141,582	$	(19,429)	$	791	$	(18,638)	$	22,445	$	145,388	1.47	%
Commercial real estate — owner occupied	10,759		(3)		5		2		1,783		12,544		1.14	%
Commercial and business lending	152,341		(19,432)		796		(18,636)		24,227		157,933		1.44	%
Commercial real estate — investor	68,338		—		—		—		4,174		72,512		1.44	%
Real estate construction	70,578		—		30		30		(6,383)		64,225		2.81	%
Commercial real estate lending	138,916		—		30		30		(2,209)		136,737		1.87	%
Total commercial	291,257		(19,432)		826		(18,606)		22,018		294,669		1.61	%
Residential mortgage	37,808		(89)		27		(62)		(1,831)		35,915		0.46	%
Auto finance	24,961		(2,600)		506		(2,094)		3,248		26,114		1.06	%
Home equity	18,032		(108)		319		211		(1,190)		17,054		2.75	%
Other consumer	13,812		(1,790)		252		(1,537)		1,755		14,029		5.43	%
Total consumer	94,613		(4,586)		1,104		(3,482)		1,982		93,112		0.83	%
Total loans	$	385,870	$	(24,018)	$	1,930	$	(22,088)	$	24,000	$	387,782	1.31	%

The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2023:

($ in thousands)	Dec 31, 2022		Charge offs		Recoveries		Net Charge offs		Provision for credit losses		Dec 31, 2023		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	119,076	$	(45,687)	$	3,015	$	(42,672)	$	51,859	$	128,263
Commercial real estate — owner occupied	9,475		(25)		11		(15)		1,150		10,610
Commercial and business lending	128,551		(45,713)		3,026		(42,687)		53,009		138,873
Commercial real estate — investor	54,398		(252)		3,016		2,763		10,697		67,858
Real estate construction	45,589		(25)		80		55		7,910		53,554
Commercial real estate lending	99,986		(277)		3,095		2,819		18,607		121,412
Total commercial	228,538		(45,989)		6,121		(39,868)		71,616		260,285
Residential mortgage	38,298		(952)		541		(411)		(79)		37,808
Auto finance	19,619		(5,950)		1,241		(4,709)		10,051		24,961
Home equity	14,875		(424)		1,262		837		(310)		15,403
Other consumer	11,390		(5,453)		978		(4,475)		5,723		12,638
Total consumer	84,182		(12,779)		4,021		(8,758)		15,384		90,809
Total loans	$	312,720	$	(58,768)	$	10,142	$	(48,626)	$	87,000	$	351,094
Allowance for unfunded commitments
Commercial and industrial	$	12,997	$	—	$	—	$	—	$	321	$	13,319
Commercial real estate — owner occupied	103		—		—		—		46		149
Commercial and business lending	13,101		—		—		—		367		13,468
Commercial real estate — investor	710		—		—		—		(230)		480
Real estate construction	20,583		—		—		—		(3,558)		17,024
Commercial real estate lending	21,292		—		—		—		(3,788)		17,504
Total commercial	34,393		—		—		—		(3,421)		30,972
Home equity	2,699		—		—		—		(70)		2,629
Other consumer	1,683		—		—		—		(509)		1,174
Total consumer	4,382		—		—		—		(579)		3,803
Total loans	$	38,776	$	—	$	—	$	—	$	(4,000)	$	34,776
Allowance for credit losses on loans
Commercial and industrial	$	132,073	$	(45,687)	$	3,015	$	(42,672)	$	52,181	$	141,582	1.45	%
Commercial real estate — owner occupied	9,579		(25)		11		(15)		1,195		10,759		1.01	%
Commercial and business lending	141,652		(45,713)		3,026		(42,687)		53,376		152,341		1.41	%
Commercial real estate — investor	55,108		(252)		3,016		2,763		10,467		68,338		1.33	%
Real estate construction	66,171		(25)		80		55		4,351		70,578		3.11	%
Commercial real estate lending	121,279		(277)		3,095		2,819		14,819		138,916		1.88	%
Total commercial	262,931		(45,989)		6,121		(39,868)		68,195		291,257		1.60	%
Residential mortgage	38,298		(952)		541		(411)		(79)		37,808		0.48	%
Auto finance	19,619		(5,950)		1,241		(4,709)		10,051		24,961		1.11	%
Home equity	17,574		(424)		1,262		837		(380)		18,032		2.87	%
Other consumer	13,073		(5,453)		978		(4,475)		5,214		13,812		4.97	%
Total consumer	88,565		(12,779)		4,021		(8,758)		14,805		94,613		0.86	%
Total loans	$	351,496	$	(58,768)	$	10,142	$	(48,626)	$	83,000	$	385,870	1.32	%

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Goodwill

Goodwill is not amortized but is instead subject to impairment tests on at least an annual basis, and more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

The Corporation conducted its most recent annual impairment testing in May 2023, utilizing a qualitative assessment. Factors that management considered in this assessment included macroeconomic conditions, industry and market considerations, overall financial performance of the Corporation and each reporting unit (both current and projected), changes in management strategy, and changes in the composition or carrying amount of net assets. In addition, management considered the changes in both the Corporation's common stock price and in the KBW Nasdaq Regional Banking Index (KRX), as well as the Corporation's earnings per common share trend over the past year. Based on these assessments, 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 2023 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in 2023 or the first three months of 2024.

The Corporation had goodwill of $1.1 billion at both March 31, 2024 and December 31, 2023.

Core Deposit Intangibles

The Corporation has CDIs which are amortized. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:

($ in thousands)	Three Months Ended March 31, 2024		Year Ended Dec 31, 2023
Core deposit intangibles
Gross carrying amount at the beginning of period	$	88,109	$	88,109
Accumulated amortization	(49,841)		(47,638)
Net book value	$	38,268	$	40,471
Amortization during the period	$	2,203	$	8,811

Mortgage Servicing Rights

The Corporation sells residential mortgage loans in the secondary market and typically retains the right to service the loans sold. MSRs are not traded in active markets. As a result, a cash flow model is used to determine fair value. Key assumptions and estimates, including projected prepayment speeds, assumed servicing costs, ancillary income, costs to service delinquent loans, costs of foreclosure, and discount rates with option-adjusted spreads, are used in measuring the fair value of the MSRs asset. These assumptions are considered significant unobservable inputs. See Note 11 for a discussion of the recourse provisions on sold residential mortgage loans. See Note 12 which further discusses fair value measurement relative to the MSRs asset.

A summary of changes in the balance of the MSRs asset under the fair value measurement method for the three months ended March 31, 2024 and the year ended December 31, 2023 is as follows:

($ in thousands)	Three Months Ended March 31, 2024			Year Ended Dec 31, 2023
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$	84,390		$	77,351
Additions	877			3,564
Paydowns	(1,687)			(7,185)
Valuation:
Change in fair value model assumptions	—			8,881
Changes in fair value of asset	1,646			1,778
Mortgage servicing rights at end of period	$	85,226		$	84,390
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)(a)	$	6,349,049		$	7,364,492
Mortgage servicing rights to servicing portfolio(a)	1.34		%	1.15		%

(a) During the fourth quarter of 2023, the Corporation transferred $969 million of residential mortgages into held for sale and subsequently sold them for $844 million. After sale, the servicing was retained for a short period until full servicing was transferred to the purchaser in January 2024.

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 March 31, 2024. 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 amortization expense for CDIs and decay for MSRs:

($ in thousands)	Core Deposit Intangibles		Mortgage Servicing Rights
Nine months ended December 31, 2024	$	6,608	$	6,930
2025	8,811		11,133
2026	8,811		11,013
2027	8,811		10,506
2028	3,485		9,628
2029	1,681		8,614
Beyond 2029	61		27,402
Total estimated amortization expense and MSRs decay	$	38,268	$	85,226

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Short and Long-Term Funding

3 Months Ended

Mar. 31, 2024

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)	Mar 31, 2024		Dec 31, 2023
Short-term funding
Federal funds purchased	$	175,135	$	220,160
Securities sold under agreements to repurchase	90,536		106,620
Federal funds purchased and securities sold under agreements to repurchase	265,671		326,780
BTFP funding	500,000		—
Total short-term funding	$	765,671	$	326,780
Long-term funding
Corporation subordinated notes, at par	$	550,000	$	550,000
Discount and capitalized costs	(7,468)		(7,748)
Subordinated debt fair value hedge(a)	(6,838)		(1,366)
Finance leases	361		383
Total long-term funding	$	536,055	$	541,269
Total short and long-term funding, excluding FHLB advances	$	1,301,726	$	868,049
FHLB advances
Short-term FHLB advances	$	138,000	$	740,000
Long-term FHLB advances	1,209,862		1,209,907
FHLB advances fair value hedge(a)	(14,451)		(9,713)
Total FHLB advances	$	1,333,411	$	1,940,194
Total short and long-term funding	$	2,635,137	$	2,808,243

(a) For additional information on the fair value hedges, see Note 9.

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 March 31, 2024, the Corporation had pledged securities valued at 215% 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 as of March 31, 2024 and December 31, 2023 are presented in the following table:

	Overnight and Continuous
($ in thousands)	Mar 31, 2024		Dec 31, 2023
Repurchase agreements
Agency mortgage-related securities	$	90,536	$	106,620

Long-Term Funding

Subordinated Notes 

In November 2014, the Corporation issued $250 million of 10-year subordinated notes, due January 2025, and callable October 2024. The subordinated notes have a fixed coupon interest rate of 4.25% and were issued at a discount.

In February 2023, the Corporation issued $300 million of 10-year subordinated notes, due March 1, 2033 and redeemable (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). 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.

Finance Leases

Finance leases are used in conjunction with branch operations. See Note 16 for additional disclosure regarding the Corporation’s leases.

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Derivative and Hedging Activities

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative and Hedging Activities

Derivative and Hedging Activities

The Corporation is exposed to certain risk arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, foreign currency, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates and/or foreign currency exchange rates. The Corporation's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation's known or expected cash receipts and its known or expected cash payments principally related to the Corporation's assets.

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 $89 million and $93 million of investment securities as collateral at March 31, 2024 and December 31, 2023, respectively. Cash is often pledged as collateral for derivatives that are not centrally cleared. The Corporation had no required cash collateral at March 31, 2024, compared to $5 million at December 31, 2023.

To qualify for hedge accounting, a hedging relationship must be highly effective at mitigating the risk associated with the exposure being hedged. The Corporation performs effectiveness assessments of its derivative financial instruments prospectively at inception and both prospectively and retrospectively quarterly thereafter. The initial prospective assessment is performed on a quantitative basis unless the hedging relationship meets certain conditions, and subsequent assessments are performed on a quantitative basis unless certain conditions are met where a qualitative basis may be used. If it is determined that a derivative financial instrument is not highly effective at hedging the designated exposure, hedge accounting is discontinued.

Federal regulations require the Corporation to clear all compound SOFR interest rate swaps through a clearing house, if possible. For derivatives cleared through central clearing houses, the variation margin payments are legally characterized as daily settlements of the derivative rather than collateral. The Corporation's clearing agent for interest rate derivative contracts that are centrally cleared through the Chicago Mercantile Exchange and the London Clearing House settles the variation margin daily. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting and financial reporting purposes. Depending on the net position, the fair value is reported in other assets or accrued expenses and other liabilities on the consolidated balance sheets. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument.

Fair Value Hedges of Interest Rate Risk

The Corporation is exposed to changes in the fair value of its fixed-rate debt due to changes in benchmark interest rates. The Corporation uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rates. Interest rate swaps designated as fair value hedges involve receiving payment of fixed-rate amounts from a counterparty in exchange for the Corporation paying variable-rate payments over the life of the agreements without the exchange of the underlying notional amount.

For derivatives designated and that qualify as fair value hedges, as allowed under U.S. GAAP, the Corporation applied the "shortcut" method of accounting, which permits the assumption of perfect effectiveness. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest expense. These items, along with the net interest from the derivative, are reported in the same income statement line as the fixed-rate debt expense.

Fair Value Hedges of Foreign Currency Exchange Rate Risk

The Corporation is exposed to changes in the fair value of its foreign currency denominated loans due to changes in foreign currency exchange rates. The Corporation uses foreign currency exchange forward contracts to manage its exposure to changes in fair value on these foreign currency denominated loans.

To assess effectiveness of the foreign currency exchange forward contracts, the Corporation has elected to utilize the critical terms match method. Under the critical terms match method, if the hedging relationship meets certain criteria, it allows the Corporation to assume that the hedging relationship is perfectly effective, eliminating the quantitative aspect of assessing effectiveness. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in capital markets, net.

Cash Flow Hedges of Interest Rate Risk

The Corporation is exposed to variability in cash flows on its floating rate assets due to changes in benchmark interest rates. The Corporation uses interest rate swaps to hedge certain forecasted transactions for the variability in cash flows attributable to the contractually specified interest rate in order to add stability to net interest income and to manage its exposure to interest rate movements. Interest rate swaps designated as cash flow hedges involve receiving fixed-rate amounts from a counterparty in exchange for the Corporation making variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. These items, along with the net interest from the derivative, are reported in the same income statement line as the interest income from the floating-rate assets.

To assess effectiveness of interest rate swaps, the Corporation performs a quantitative analysis using a period by period regression method. When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income (loss) and are subsequently reclassified to interest income as interest payments are made on such variable rate loans.

Derivatives to Accommodate Customer Needs

The Corporation facilitates customer borrowing activity by entering into various derivative contracts which are designated as free standing derivative contracts. Free standing derivative products are entered into primarily for the benefit of commercial customers seeking to manage their exposures to interest rate risk and foreign currency. These derivative contracts are not designated against specific assets and liabilities on the consolidated balance sheets or forecasted transactions and, therefore, do not qualify for hedge accounting treatment. Such derivative contracts are carried at fair value in other assets and accrued expenses and other liabilities on the consolidated balance sheets with changes in the fair value recorded as a component of capital markets, net, and typically include interest rate-related instruments (swaps and caps) and foreign currency exchange forwards. See Note 10 for additional information and disclosures on balance sheet offsetting.

Interest rate-related and other instruments: The Corporation provides interest rate risk management services to commercial customers, primarily interest rate swaps and caps. The Corporation’s market risk from unfavorable movements in interest rates related to these derivative contracts is generally economically hedged by concurrently entering into offsetting derivative contracts. The offsetting derivative contracts have identical notional values, terms, and indices, except in rare circumstances where the indices are not identical which creates a negligible basis mismatch. The Corporation also enters into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans as either a participant or a lead bank. The risk participation agreements entered into by the Corporation as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution.

Foreign currency exchange forwards: The Corporation provides foreign currency exchange services to customers, primarily forward contracts. The Corporation's customers enter into a foreign currency exchange forward with the Corporation as a means for them to mitigate exchange rate risk. The Corporation mitigates its risk by then entering into an offsetting foreign currency exchange derivative contract.

Mortgage Derivatives

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 values of these commitments are recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net on the consolidated statements of income.

Interest rate-related instruments for MSRs hedge: The fair value of the Corporation's MSRs asset changes in response to changes in primary mortgage loan rates and other assumptions. To mitigate the earnings volatility caused by changes in the fair value of MSRs, the Corporation designates certain financial instruments as an economic hedge. Changes in the fair value of these instruments are generally expected to partially offset changes in the fair value of MSRs and are recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net on the consolidated statements of income.

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 as of March 31, 2024 and December 31, 2023. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of March 31, 2024 and December 31, 2023. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets.

	Mar 31, 2024								Dec 31, 2023
	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	$	1,350,000	$	2,164	$	1,750,000	$	10,685	$	2,300,000	$	8,075	$	550,000	$	930
Foreign currency exchange forwards	147,695		624		263,335		230		231,566		632		189,212		2,946
Total designated as hedging instruments			2,788				10,915				8,707				3,876
Not designated as hedging instruments:
Interest rate-related and other instruments	3,770,832		113,337		6,262,958		222,303		3,603,513		111,623		6,528,471		195,662
Foreign currency exchange forwards	115,002		5,276		88,602		4,956		87,526		2,954		135,654		2,746
Mortgage banking(a)	49,808		666		98,000		222		29,490		439		51,500		673
Total not designated as hedging instruments			119,279				227,482				115,016				199,082
Gross derivatives before netting			122,067				238,397				123,723				202,958
Less: Legally enforceable master netting agreements			6,463				6,463				18,234				18,234
Less: Cash collateral pledged/received			55,681				—				35,855				—
Total derivative instruments, after netting			$	59,923			$	231,934			$	69,634			$	184,724

(a) The notional amount of the mortgage derivative asset includes interest rate lock commitments, while the notional amount of the mortgage derivative liability includes 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)	March 31, 2024				December 31, 2023
Other long-term funding	$	(543,162)	$	6,838	$	(548,634)	$	1,366
FHLB advances	(585,549)		14,451		(590,287)		9,713
Total	$	(1,128,711)	$	21,289	$	(1,138,921)	$	11,079

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At March 31, 2024 and December 31, 2023, the carrying amount excluded for foreign currency denominated loans was $411 million and $421 million, respectively.

The Corporation terminated its $500 million fair value hedge during the fourth quarter of 2019. At March 31, 2024, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $260 million and is included in loans on the consolidated balance sheets. This amount includes $1 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 for the three months ended March 31, 2024 and 2023:

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value and Cash Flow Hedging Relationships
	Three months ended Mar 31,
	2024				2023
($ in thousands)	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)	$	(4,863)	$	5,322	$	(1,321)	$	2,515
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items	(40)		(10,210)		(59)		10,724
Derivatives designated as hedging instruments(a)	(4,823)		15,532		(1,262)		(8,209)

(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 Mar 31,
	2024		2023
($ in thousands)	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	$	—	$	—
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items	(9,070)		1,802
Derivatives designated as hedging instruments	9,070		(1,802)

The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the three months ended March 31, 2024 and 2023:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivative(a)	$	(19,461)	$	13,763
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)	4,823		1,262

(a) The entirety of gains (losses) recognized in OCI as well as the losses 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 $12 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 March 31, 2024. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 38 months as of March 31, 2024.

The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income for the three months ended March 31, 2024 and 2023:

	Consolidated Statements of Income Category of Gain / (Loss)  Recognized in Income	Three Months Ended Mar 31,
($ in thousands)		2024		2023
Derivative instruments
Interest rate-related and other instruments — customer and mirror, net	Capital markets, net	$	(71)	$	(70)
Interest rate-related instruments — MSRs hedge	Mortgage banking, net	(2,937)		2,521
Foreign currency exchange forwards	Capital markets, net	746		228
Interest rate lock commitments (mortgage)	Mortgage banking, net	227		252
Forward commitments (mortgage)	Mortgage banking, net	451		(395)

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Balance Sheet Offsetting

3 Months Ended

Mar. 31, 2024

Offsetting [Abstract]

Balance Sheet Offsetting

Balance Sheet Offsetting

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

The Corporation enters into interest rate-related instruments to facilitate the interest rate risk management strategies of commercial customers and foreign exchange forwards to manage customers' exposure to fluctuating foreign exchange rates. The Corporation typically mitigates these risks by entering into equal and offsetting agreements with highly rated third-party financial institutions, though in rare circumstances the agreements are not perfectly equal and offsetting, which creates a negligible basis mismatch. The Corporation is party to master netting arrangements with some of its financial institution counterparties that create single net settlements of all legal claims or obligations to pay or receive the net amount of settlement of the individual interest and foreign exchange agreements. Collateral, usually in the form of investment securities and cash, is posted by the counterparty with net liability positions in accordance with contract thresholds. Derivatives subject to a legally enforceable master netting agreement are reported with assets and liabilities offset resulting in a net position which is further offset by any cash collateral, and is reported in other assets and accrued expenses and other liabilities on the face of the consolidated balance sheets. For disclosure purposes, the net position on the consolidated balance sheets can be further netted down by investment securities collateral received or pledged. See Note 9 for additional information on the Corporation’s derivative and hedging activities.

The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of March 31, 2024 and December 31, 2023. 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 this table:

	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
March 31, 2024	$	102,956	$	(6,463)	$	(55,681)	$	40,812	$	(32,683)	$	8,129
December 31, 2023	87,075		(18,234)		(35,855)		32,985		(32,985)		—
	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
March 31, 2024	$	17,172	$	(6,463)	$	—	$	10,709	$	—	$	10,709
December 31, 2023	18,767		(18,234)		—		533		—		533

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

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

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

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

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 9). The following is a summary of lending-related commitments:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)	$	10,828,869	$	11,170,147
Commercial letters of credit(a)	4,580		3,697
Standby letters of credit(c)	230,396		212,029

(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 March 31, 2024 or December 31, 2023.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 9.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2 million at both March 31, 2024 and December 31, 2023, 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)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Allowance for unfunded commitments
Balance at beginning of period	$	34,776	$	38,776
Provision for unfunded commitments	(3,000)		(4,000)
Balance at end of period	$	31,776	$	34,776

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 9. 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, and deferral or elimination of capital gain recognition for tax purposes. The aggregate carrying value of these investments at March 31, 2024 was $215 million, compared to $219 million at December 31, 2023, included in tax credit and other investments on the consolidated balance sheets. The Corporation utilizes the proportional amortization method to account for investments in qualified affordable housing projects.

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 Corporation recognized additional income tax expense attributable to the amortization of investments in qualified affordable housing projects of $9 million for both the three months ended March 31, 2024 and

March 31, 2023. The Corporation's remaining investment in qualified affordable housing projects accounted for under the proportional amortization method totaled $212 million at March 31, 2024 and $215 million at December 31, 2023.

The Corporation’s unfunded equity 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 equity contributions totaled $31 million at March 31, 2024 and $27 million at December 31, 2023. Additionally, at March 31, 2024, the Corporation also invests in a private SBA loan fund, recorded in equity securities on the consolidated balance sheets, the purpose of which is to identify CRA qualifying loans within a target region, which has a remaining unfunded equity contribution of $3 million.

For the three months ended March 31, 2024 and the year ended December 31, 2023, the Corporation did not record any impairment related to qualified affordable housing investments.

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 offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The Corporation also invests in loan pools that support CRA loans. 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 $40 million at both March 31, 2024 and December 31, 2023, 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.

On at least a quarterly basis, the Corporation assesses its liabilities and contingencies in connection with all pending or threatened claims and litigation, utilizing the most recent information available. On a matter by matter basis, an accrual for loss is established for those matters which the Corporation believes it is probable that a loss may be incurred and that the amount of such loss can be reasonably estimated. Once established, each accrual is adjusted as appropriate to reflect any subsequent developments. Accordingly, management’s estimate will change from time to time, and actual losses may be more or less than the current estimate. For matters where a loss is not probable, or the amount of the loss cannot be estimated, no accrual is established.

Resolution of legal claims is inherently unpredictable, and in many legal proceedings various factors exacerbate this inherent unpredictability, including where the damages sought are unsubstantiated or indeterminate, it is unclear whether a case brought as a class action will be allowed to proceed on that basis, discovery is not complete, the proceeding is not yet in its final stages, the matters present legal uncertainties, there are significant facts in dispute, there are a large number of parties (including where it is uncertain how liability, if any, will be shared among multiple defendants), or there is a wide range of potential results.

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.

Regulatory Matters

A variety of consumer products, including mortgage and deposit products, and certain fees and charges related to such products, have come under increased regulatory scrutiny. It is possible that regulatory authorities could bring enforcement actions, including civil money penalties, or take other actions against the Corporation in regard to these consumer products. The Bank could also determine of its own accord, or be required by regulators, to refund or otherwise make remediation payments to customers in connection with these products, fees and charges. It is not possible at this time for management to assess the probability of a material adverse outcome or reasonably estimate the amount of any potential loss related to such matters.

In recent consent orders with financial institutions, the CFPB has asserted that certain overdraft charges constitute “unfair and abusive acts and practices.” In certain instances, these financial institutions have agreed to make restitution to customers and to pay civil money penalties. Included in the practices that the CFPB has asserted are “unfair and abusive” are 1) overdraft fees on transactions that had a sufficient balance at the time authorized but then later settled with an insufficient balance (“APSN Fees”), and 2) repeat insufficient funds fees on transactions resubmitted for payment after they were initially declined (“Representment Fees”). In light of these orders, the Corporation has undertaken a review of its current and past practices regarding APSN Fees and Representment Fees. Such review could result in changes to our overdraft fee policies, which would reduce our fee income in future periods and which could also result in a decision to make remediation payments to current and past customers who incurred such fees. The Corporation’s financial results may be materially impacted in any period in which the Corporation determines to make any such remediation payments. In addition to the review described above, the Corporation received an arbitration request in July 2023 which, among other things, sought to recover APSN Fees and Representment Fees on behalf of approximately 1,400 current and former deposit customers of the Corporation (the “arbitration request”). After mediation of the arbitration request, a settlement of up to $2.1 million including attorneys' fees was concluded in February 2024.

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 $1 million and $5 million for the three months ended March 31, 2024 and the year ended December 31, 2023, respectively. There were no loss reimbursement and settlement claims paid in the three months ended March 31, 2024 or for the year ended December 31, 2023. Make whole requests since January 1, 2023 generally arose from loans originated since January 1, 2021 with such balances totaling $3.9 billion at the time of sale, consisting primarily of loans sold to GSEs. As of March 31, 2024, $3.3 billion of those loans originated since January 1, 2021 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 approximately $704,000 at March 31, 2024 and $835,000 at December 31, 2023.

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 both March 31, 2024 and December 31, 2023, there were $15 million 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. The Corporation resumed selling loans to the FHLB with such credit risk retention in February 2024, but prior to that, had not sold any loans with this credit risk retention since February 2005. At March 31, 2024 and December 31, 2023, there were $37 million and $16 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

3 Months Ended

Mar. 31, 2024

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 2023 Annual Report on Form 10-K.

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 as of March 31, 2024 and December 31, 2023, aggregated by the level in the fair value hierarchy within which those measurements fall:

	Mar 31, 2024
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	429,859	$	429,859	$	429,859	$	—	$	—
Interest-bearing deposits in other financial institutions	420,114		420,114		420,114		—		—
Federal funds sold and securities purchased under agreements to resell	1,610		1,610		1,610		—		—
AFS investment securities:
U.S. Treasury securities	35,558		35,558		35,558		—		—
Obligations of state and political subdivisions (municipal securities)	80,830		80,830		—		80,830		—
Residential mortgage-related securities:
FNMA / FHLMC	1,090,998		1,090,998		—		1,090,998		—
GNMA	2,214,513		2,214,513		—		2,214,513		—
Commercial mortgage-related securities:
FNMA / FHLMC	17,008		17,008		—		17,008		—
GNMA	152,232		152,232		—		152,232		—
Asset backed securities:
FFELP	129,154		129,154		—		129,154		—
SBA	890		890		—		890		—
Other debt securities	2,965		2,965		—		2,965		—
Total AFS investment securities	3,724,148		3,724,148		35,558		3,688,590		—
HTM investment securities:
U.S. Treasury securities	999		969		969		—		—
Obligations of state and political subdivisions (municipal securities), net	1,676,199		1,523,658		—		1,523,658		—
Residential mortgage-related securities:
FNMA / FHLMC	930,148		771,944		—		771,944		—
GNMA	48,043		44,457		—		44,457		—
Private-label	341,153		281,069		—		281,069		—
Commercial mortgage-related securities:
FNMA / FHLMC	779,310		628,928		—		628,928		—
GNMA	57,114		50,183		—		50,183		—
Total HTM investment securities, net	3,832,967		3,301,209		969		3,300,239		—
Equity securities:
Equity securities	7,071		7,071		6,966		—		105
Equity securities at NAV	12,500		12,500
Total equity securities	19,571		19,571
FHLB and Federal Reserve Bank stocks	173,968		173,968		—		173,968		—
Residential loans held for sale	52,414		52,414		—		52,414		—
Loans, net	29,138,257		27,739,448		—		—		27,739,448
Bank and corporate owned life insurance	685,089		685,089		—		685,089		—
Mortgage servicing rights, net	85,226		85,226		—		—		85,226
Interest rate-related instruments designated as hedging instruments(a)	2,164		2,164		—		2,164		—
Foreign currency exchange forwards designated as hedging instruments(a)	624		624		—		624		—
Interest rate-related and other instruments not designated as hedging instruments(a)	113,337		113,337		—		113,337		—
Foreign currency exchange forwards not designated as hedging instruments(a)	5,276		5,276		—		5,276		—
Interest rate lock commitments to originate residential mortgage loans held for sale	666		666		—		—		666
Total selected assets at fair value	$	38,685,290	$	36,754,723	$	895,077	$	8,021,701	$	27,825,445

(a) Figures are presented gross before netting. See Note 9 and Note 10 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.

	Mar 31, 2024
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Noninterest-bearing demand	$	6,254,135	$	6,254,135	$	—	$	—	$	6,254,135
Savings	5,124,639		5,124,639		—		—		5,124,639
Interest-bearing demand	8,747,127		8,747,127		—		—		8,747,127
Money market	6,721,674		6,721,674		—		—		6,721,674
Brokered CDs(a)	3,931,230		3,931,230		—		3,931,230		—
Other time deposits(a)	2,934,352		2,934,352		—		2,934,352		—
Total deposits	33,713,158		33,713,158		—		6,865,582		26,847,575
Short-term funding:
Federal funds purchased and securities sold under agreements to repurchase	265,671		265,661		—		265,661		—
BTFP funding	500,000		497,959		—		497,959		—
Total short-term funding	765,671		763,620		—		763,620		—
FHLB advances	1,333,411		1,320,280		—		1,320,280		—
Other long-term funding	536,055		517,009		—		517,009		—
Standby letters of credit(b)	2,347		2,347		—		2,347		—
Interest rate-related instruments designated as hedging instruments(c)	10,685		10,685		—		10,685		—
Foreign currency exchange forwards designated as hedging instruments(c)	230		230		—		230		—
Interest rate-related and other instruments not designated as hedging instruments(c)	222,303		222,303		—		222,303		—
Foreign currency exchange forwards not designated as hedging instruments(c)	4,956		4,956		—		4,956		—
Forward commitments to sell residential mortgage loans	222		222		—		—		222
Total selected liabilities at fair value	$	36,589,039	$	36,554,811	$	—	$	9,707,013	$	26,847,797

(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.
(b) The commitment on standby letters of credit was $230 million at March 31, 2024. See Note 11 for additional information on the standby letters of credit and for information on    the fair value of lending-related commitments.
(c) Figures are presented gross before netting. See Note 9 and Note 10 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, 2023
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	484,384	$	484,384	$	484,384	$	—	$	—
Interest-bearing deposits in other financial institutions	425,089		425,089		425,089		—		—
Federal funds sold and securities purchased under agreements to resell	14,350		14,350		14,350		—		—
AFS investment securities:
U.S. Treasury securities	35,902		35,902		35,902		—		—
Obligations of state and political subdivisions (municipal securities)	91,817		91,817		—		91,817		—
Residential mortgage-related securities:
FNMA / FHLMC	1,120,794		1,120,794		—		1,120,794		—
GNMA	2,042,675		2,042,675		—		2,042,675		—
Commercial mortgage-related securities:
FNMA / FHLMC	16,937		16,937		—		16,937		—
GNMA	154,793		154,793		—		154,793		—
Asset backed securities:
FFELP	133,975		133,975		—		133,975		—
SBA	1,051		1,051		—		1,051		—
Other debt securities	2,950		2,950		—		2,950		—
Total AFS investment securities	3,600,892		3,600,892		35,902		3,564,990		—
HTM investment securities:
U.S. Treasury securities	999		963		963		—		—
Obligations of state and political subdivisions (municipal securities), net	1,682,398		1,553,984		—		1,553,984		—
Residential mortgage-related securities:
FNMA / FHLMC	941,973		804,393		—		804,393		—
GNMA	48,979		46,170		—		46,170		—
Private-label	345,083		289,507		—		289,507		—
Commercial mortgage-related securities:
FNMA / FHLMC	780,995		632,914		—		632,914		—
GNMA	59,733		52,619		—		52,619		—
Total HTM investment securities, net	3,860,160		3,380,550		963		3,379,586		—
Equity securities:
Equity securities	31,651		31,651		6,883		—		24,769
Equity securities at NAV	10,000		10,000
Total equity securities	41,651		41,651
FHLB and Federal Reserve Bank stocks	229,171		229,171		—		229,171		—
Residential loans held for sale	33,011		33,011		—		33,011		—
Commercial loans held for sale	90,303		90,303		—		90,303		—
Loans, net	28,865,124		27,371,086		—		—		27,371,086
Bank and corporate owned life insurance	682,649		682,649		—		682,649		—
Mortgage servicing rights, net	84,390		84,390		—		—		84,390
Interest rate-related instruments designated as hedging instruments(a)	8,075		8,075		—		8,075		—
Foreign currency exchange forwards designated as hedging instruments(a)	632		632		—		632		—
Interest rate-related and other instruments not designated as hedging instruments(a)	111,623		111,623		—		111,623		—
Foreign currency exchange forwards not designated as hedging instruments(a)	2,954		2,954		—		2,954		—
Interest rate lock commitments to originate residential mortgage loans held for sale	439		439		—		—		439
Total selected assets at fair value	$	38,534,897	$	36,561,249	$	967,570	$	8,102,995	$	27,480,684

(a) Figures are presented gross before netting. See Note 9 and Note 10 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, 2023
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Noninterest-bearing demand	$	6,119,956	$	6,119,956	$	—	$	—	$	6,119,956
Savings	4,835,701		4,835,701		—		—		4,835,701
Interest-bearing demand	8,843,967		8,843,967		—		—		8,843,967
Money market	6,330,453		6,330,453		—		—		6,330,453
Brokered CDs(a)	4,447,479		4,447,479		—		4,447,479		—
Other time deposits(a)	2,868,494		2,868,494		—		2,868,494		—
Total deposits	33,446,049		33,446,049		—		7,315,973		26,130,076
Federal funds purchased and securities sold under agreements to repurchase	326,780		326,757		—		326,757		—
FHLB advances	1,940,194		1,944,600		—		1,944,600		—
Other long-term funding	541,269		534,983		—		534,983		—
Standby letters of credit(b)	2,157		2,157		—		2,157		—
Interest rate-related instruments designated as hedging instruments(c)	930		930		—		930		—
Foreign currency exchange forwards designated as hedging instruments(c)	2,946		2,946		—		2,946		—
Interest rate-related and other instruments not designated as hedging instruments(c)	195,662		195,662		—		195,662		—
Foreign currency exchange forwards not designated as hedging instruments(c)	2,746		2,746		—		2,746		—
Forward commitments to sell residential mortgage loans	673		673		—		—		673
Total selected liabilities at fair value	$	36,459,407	$	36,457,504	$	—	$	10,326,755	$	26,130,749

(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.

(b) The commitment on standby letters of credit was $212 million at December 31, 2023. See Note 11 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

(c) Figures are presented gross before netting. See Note 9 and Note 10 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 three months ended March 31, 2024 and the year ended December 31, 2023, for the Corporation's mortgage derivatives measured 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		Total
Balance December 31, 2022	$	86	$	46	$	40
New production	6,557		(1,816)		8,373
Closed loans / settlements	(4,171)		2,494		(6,665)
Other	(2,033)		(51)		(1,982)
Change in mortgage derivative	352		627		(274)
Balance December 31, 2023	$	439	$	673	$	(234)
New production	$	1,820	$	(590)	$	2,409
Closed loans / settlements	(1,546)		188		(1,734)
Other	(46)		(49)		3
Change in mortgage derivative	227		(451)		678
Balance March 31, 2024	$	666	$	222	$	444

The following table presents a rollforward of the fair value of Level 3 equity securities, for the three months ended March 31, 2024 and the year ended December 31, 2023, 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, 2022	$	19,225
Gains recognized in investment securities gains, net	5,861
Purchases	11
Sales	(329)
Fair value as of December 31, 2023	$	24,769
Gains recognized in investment securities gains, net	$	4,054
Purchases	8
Sales	(28,725)
Fair value as of March 31, 2024	$	105

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:

($ in thousands)	Fair Value Hierarchy	Fair Value		Consolidated Statements of Income Category of Adjustment Recognized in Income	Adjustment Recognized on the Consolidated Statements of Income(a)
March 31, 2024
Assets
Individually evaluated loans	Level 3	$	67,625	Provision for credit losses	$	22,305
OREO(b)	Level 2	102		Other noninterest expense / provision for credit losses(c)	21
December 31, 2023
Assets
Individually evaluated loans	Level 3	$	47,221	Provision for credit losses	$	45,709
OREO(b)	Level 2	3,139		Other noninterest expense / provision for credit losses(c)	2,532
Equity securities without readily determinable fair values	Level 3	24,671		Investment securities gains (losses), net	5,785

(a) Includes the YTD impact on the consolidated statements of income.

(b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value and is therefore not included in the table.

(c) When a property's value is written down at the time it is transferred to OREO, the charge off is booked to the provision for credit losses. When a property is already in OREO and subsequently written down, the charge off is booked to other noninterest expense.

Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a nonrecurring basis include the fair value analysis in the goodwill impairment test as well as intangible assets and other nonfinancial long-lived assets measured at fair value for the purpose of impairment assessment.

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

March 31, 2024	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%	6%
Individually evaluated loans	Appraisals / Discounted cash flow	Collateral / Discount factor	11%	-	56%	52%
Interest rate lock commitments to originate residential mortgage loans held for sale	Discounted cash flow	Closing Ratio	25%	-	100%	86%

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Retirement Plans

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Retirement Plans

Retirement Plans

The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet the eligibility requirements. The benefits are based primarily on years of service and the employee’s eligible compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Retirement plans of acquired entities are typically merged into the RAP depending on the terms of the merger agreement, and, as applicable, credit is usually applied to employees for years of service at the acquired institution for vesting and eligibility purposes.

The Corporation also provides 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 cost and net periodic benefit cost for the RAP and Postretirement Plan for the three months ended March 31, 2024 and 2023 were as follows:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
RAP
Service cost	$	874	$	796
Interest cost	2,719		2,686
Expected return on plan assets	(8,650)		(8,202)
Amortization of prior service cost	(53)		(63)
Amortization of actuarial loss	—		37
Total net periodic pension cost	$	(5,111)	$	(4,746)
Postretirement Plan
Interest cost	$	18	$	20
Amortization of prior service cost	(19)		(19)
Amortization of actuarial (gain)	(7)		(7)
Total net periodic benefit cost	$	(8)	$	(7)

The components of net periodic pension cost and net periodic benefit cost, other than the service cost component, are included in the line item other of noninterest expense on the consolidated statements of income. The service cost components are included in personnel on 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 2023 or the three months ended March 31, 2024.

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Segment Reporting

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting

The Corporation utilizes a risk-based internal profitability measurement system to provide strategic business unit reporting. The profitability measurement system is based on internal management methodologies designed to produce consistent results and reflect the underlying economics of the units. Certain strategic business units have been combined for segment information reporting purposes 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. The financial information of the Corporation’s segments has been compiled utilizing the accounting policies described in the Corporation’s 2023 Annual Report on Form 10-K, with certain exceptions. The more significant of these exceptions are described herein.

The reportable segment results are presented based on the Corporation's internal management accounting process. 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, reported segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in previously reported segment financial data. Additionally, the information presented is not indicative of how the segments would perform if they operated as independent entities.

To determine financial performance of each segment, the Corporation allocates FTP assignments, the provision for credit losses, certain noninterest expenses, income taxes, and equity to each 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 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 maturity, prepayment and/or re-pricing characteristics of the assets and liabilities. The net effect of this allocation is offset in the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's net interest income. The net FTP 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 the methodologies described in the Corporation’s 2023 Annual Report on Form 10-K. The net effect of the credit provision is recorded in Risk Management and Shared Services. Indirect

expenses incurred by certain centralized support areas are allocated to segments based on actual usage (for example, volume measurements) and other criteria. Certain types of administrative expense and bank-wide expense accruals (including, when applicable, amortization of CDIs and other intangible assets associated with acquisitions, acquisition-related costs, and asset gains on disposed business units) are generally not allocated to segments. Income taxes are 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. Equity is allocated to the segments based on regulatory capital requirements and in proportion to an assessment of the inherent risks associated with the business of the segment (including interest, credit and operating risk).

A brief description of each business segment is presented below. A more in-depth discussion of these segments can be found in the Segment Reporting note in the Corporation’s 2023 Annual Report on Form 10-K.

The Corporate and Commercial Specialty segment serves a wide range of customers including larger businesses, developers, not-for-profits, municipalities, and financial institutions by providing lending and deposit solutions as well as the support to deliver, fund, and manage such banking solutions. In addition, this segment provides a variety of investment, fiduciary, and retirement planning products and services to individuals and small to mid-sized businesses. The Community, Consumer, and Business segment serves individuals, as well as small and mid-sized businesses, by providing lending and deposit solutions. The Risk Management and Shared Services segment includes key shared operational functions and also includes residual revenue and expenses, representing the difference between actual amounts incurred and the amounts allocated to operating segments, including interest rate risk residuals (FTP mismatches) and credit risk and provision residuals (long-term credit charge mismatches).

Information about the Corporation’s segments is presented below:

	Corporate and Commercial Specialty
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	242,931	$	219,123
Net intersegment interest (expense)	(93,736)		(80,980)
Segment net interest income	149,195		138,143
Noninterest income	34,422		32,717
Total revenue	183,617		170,860
Provision for credit losses	15,428		13,782
Noninterest expense	66,350		62,119
Income before income taxes	101,839		94,960
Income tax expense	21,081		17,726
Net income	$	80,758	$	77,234
Allocated goodwill	$	525,836	$	525,836

	Community, Consumer, and Business
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	58,192	$	80,284
Net intersegment interest income	130,159		88,079
Segment net interest income	188,351		168,363
Noninterest income	24,494		25,947
Total revenue	212,845		194,310
Provision for credit losses	6,825		6,758
Noninterest expense	110,490		111,735
Income before income taxes	95,530		75,817
Income tax expense	20,062		15,922
Net income	$	75,468	$	59,895
Allocated goodwill	$	579,156	$	579,156

	Risk Management and Shared Services
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest (loss)	$	(43,266)	$	(25,397)
Net intersegment (expense)	(36,422)		(7,099)
Segment net interest (loss)	(79,688)		(32,496)
Noninterest income	6,068		3,409
Total revenue	(73,620)		(29,087)
Provision for credit losses	1,747		(2,568)
Noninterest expense	20,817		13,558
(Loss) before income taxes	(96,184)		(40,077)
Income tax (benefit)	(21,127)		(6,307)
Net (loss)	$	(75,058)	$	(33,770)
Allocated goodwill	$	—	$	—

	Consolidated Total
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	257,858	$	274,010
Net intersegment interest income	—		—
Segment net interest income	257,858		274,010
Noninterest income	64,985		62,073
Total revenue	322,842		336,083
Provision for credit losses	24,001		17,971
Noninterest expense	197,657		187,412
Income before income taxes	101,185		130,700
Income tax expense	20,016		27,340
Net income	$	81,169	$	103,360
Allocated goodwill	$	1,104,992	$	1,104,992

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Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2024

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

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2024 and 2023, including changes during the preceding three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):

($ in thousands)	AFS Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2023	$	(148,641)	$	3,080	$	(25,535)	$	(171,096)
Other comprehensive (loss) before reclassifications	(29,889)		—		—		(29,889)
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities losses, net	197		—		—		197
HTM investment securities, net, at amortized cost(a)	2,060		—		—		2,060
Other assets / accrued expenses and other liabilities	—		(19,461)		—		(19,461)
Interest income	—		4,823		—		4,823
Personnel expense	—		—		(72)		(72)
Other expense	—		—		(7)		(7)
Income tax benefit (expense)	6,885		(1,688)		(1,633)		3,564
Net other comprehensive (loss) during period	(20,746)		(16,326)		(1,712)		(38,785)
Balance March 31, 2024	$	(169,388)	$	(13,246)	$	(27,247)	$	(209,881)
Balance December 31, 2022	$	(233,192)	$	3,360	$	(42,968)	$	(272,799)
Other comprehensive income before reclassifications	36,478		—		—		36,478
Amounts reclassified from accumulated other comprehensive income (loss):
HTM investment securities, net, at amortized cost(a)	2,267		—		—		2,267
Other assets / accrued expenses and other liabilities	—		13,763		—		13,763
Interest income	—		1,262		—		1,262
Personnel expense	—		—		(81)		(81)
Other expense	—		—		30		30
Income tax (expense) benefit	(9,892)		(4,694)		79		(14,507)
Net other comprehensive income during period	28,853		10,331		27		39,211
Balance March 31, 2023	$	(204,339)	$	13,691	$	(42,940)	$	(233,588)

(a) Amortization of net unrealized losses on AFS securities transferred to HTM securities.

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Leases

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Leases

Leases

The Corporation has operating leases for retail and corporate offices, land, and equipment. The Corporation also has a finance lease for retail and corporate offices.

These leases have original terms of 1 year or longer with remaining maturities up to 39 years, some of which include options to extend the lease term. An analysis of the lease options has been completed and any purchase options or optional periods that the Corporation is reasonably likely to extend have been included in the capitalization.

The discount rate used to capitalize the operating leases is the Corporation's FHLB borrowing rate on the date of lease commencement. When determining the rate to discount specific lease obligations, the repayment period and term are considered.

Operating and finance lease costs and cash flows resulting from these leases are presented below:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Operating lease costs	$	1,545	$	1,464
Finance lease costs	23		23
Operating lease cash flows	1,844		1,828
Finance lease cash flows	23		22

The right-of-use asset and lease liability by lease classifications on the consolidated balance sheets were as follows:

($ in thousands)	Consolidated Balance Sheets Category	Mar 31, 2024		Dec 31, 2023
Operating lease right-of-use asset	Premises and equipment	$	23,310	$	24,712
Finance lease right-of-use asset	Other assets	347		368
Operating lease liability	Accrued expenses and other liabilities	25,813		27,311
Finance lease liability	Other long-term funding	361		383

The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows:

	Mar 31, 2024					Dec 31, 2023
($ in thousands)	Lease payments		Weighted-average lease term (in years)	Weighted-average discount rate		Lease payments		Weighted-average lease term (in years)	Weighted-average discount rate
Operating leases
Retail and corporate offices	$	24,223	5.61	3.14	%	$	25,729	5.76	3.12	%
Land	3,846		6.87	3.49	%	4,050		6.98	3.48	%
Equipment	408		2.25	4.62	%	408		2.50	4.62	%
Total operating leases	$	28,476	5.73	3.21	%	$	30,187	5.88	3.19	%
Finance leases
Retail and corporate offices	$	370	4.00	1.32	%	$	394	4.25	1.32	%
Total finance leases	$	370	4.00	1.32	%	$	394	4.25	1.32	%

Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows:

($ in thousands)	Operating Leases		Finance Leases		Total Leases
Nine months ended December 31, 2024	$	4,828	$	69	$	4,898
2025	5,629		93		5,721
2026	5,023		93		5,116
2027	4,312		93		4,404
2028	3,428		23		3,451
Beyond 2028	5,257		—		5,257
Total lease payments	$	28,476	$	370	$	28,847
Less: interest	2,663		9		2,673
Present value of lease payments	$	25,813	$	361	$	26,174

As of March 31, 2024 and December 31, 2023, additional operating leases, primarily retail and corporate offices, that had not yet commenced totaled $6 million and $3 million, respectively. The leases that had not yet commenced as of March 31, 2024 will commence between May 2024 and April 2025 with lease terms of 1 year to 11 years.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Standards Update and Change in Accounting Principle [Abstract]

New Accounting Pronouncements Adopted

New Accounting Pronouncements Adopted

Standard	Description	Date of adoption	Effect on financial statements
ASU 2023-02 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method	The amendments in this update permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. A reporting entity may make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing to apply the proportional amortization method at the reporting entity level or to individual investments. The amendments in this update also remove certain guidance for Qualified Affordable Housing Project investments and require the application of the delayed equity contribution guidance to all tax equity investments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and must be applied on either a modified retrospective or a retrospective basis. Early adoption is permitted in any interim period, however if adopted in an interim period the entity shall adopt the amendments in this update as of the beginning of the fiscal year that includes the interim period.	1st Quarter 2024	The Corporation has determined the impact on its results of operation, financial position, liquidity, and disclosures is immaterial.

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 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures	The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted.	Fiscal year 2024 and interim periods beginning in 1st quarter 2025	The Corporation is currently evaluating the impact on its disclosures.
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures	The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and are to be applied on a prospective basis. Early adoption is permitted.	1st Quarter 2025	The Corporation is currently evaluating the impact on its disclosures.

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Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2024

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 Mar 31,
($ in thousands, except per share data)	2024		2023
Net income	$	81,169	$	103,360
Preferred stock dividends	(2,875)		(2,875)
Net income available to common equity	$	78,294	$	100,485
Common shareholder dividends	(33,407)		(31,808)
Unvested share-based payment awards	(120)		(205)
Undistributed earnings	$	44,767	$	68,472
Undistributed earnings allocated to common shareholders	$	44,524	$	68,086
Undistributed earnings allocated to unvested share-based payment awards	242		386
Undistributed earnings	$	44,767	$	68,472
Basic
Distributed earnings to common shareholders	$	33,407	$	31,808
Undistributed earnings allocated to common shareholders	44,524		68,086
Total common shareholders earnings, basic	$	77,932	$	99,894
Diluted
Distributed earnings to common shareholders	$	33,407	$	31,808
Undistributed earnings allocated to common shareholders	44,524		68,086
Total common shareholders earnings, diluted	$	77,932	$	99,894
Weighted average common shares outstanding	149,855		149,763
Effect of dilutive common stock awards	1,436		1,365
Diluted weighted average common shares outstanding	151,292		151,128
Basic earnings per common share	$	0.52	$	0.67
Diluted earnings per common share	$	0.52	$	0.66

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Summary of company's stock option activities

A summary of the Corporation’s stock option activity for the three months ended March 31, 2024 is presented below:

Stock Options	Shares(a)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value(a)
Outstanding at December 31, 2023	3,792	$	21.25	4.26 years	$	5,834
Exercised	179	17.27
Outstanding at March 31, 2024	3,613	$	21.45	4.08 years	$	5,299
Options Exercisable at March 31, 2024	3,613	$	21.45	4.08 years	$	5,299

(a) In thousands

Summary of restricted stock awards activity (excluding salary shares)

The following table summarizes information about the Corporation’s restricted stock awards activity for the three months ended March 31, 2024:

Restricted Stock	Shares(a)	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2023	2,349	$	21.20
Granted	802	21.00
Vested	631	24.39
Forfeited	4	22.05
Outstanding at March 31, 2024	2,516	$	21.33

(a) In thousands

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Investment Securities (Tables)

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Investment securities available for sale

The amortized cost and fair values of AFS and HTM securities at March 31, 2024 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,985	$	—	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	83,823		1		(2,995)		80,830
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		221		(156,880)		1,090,998
GNMA	2,219,058		6,114		(10,658)		2,214,513
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		—		(1,595)		17,008
GNMA	159,523		—		(7,291)		152,232
Asset backed securities:
FFELP	130,196		22		(1,065)		129,154
SBA	916		1		(28)		890
Other debt securities	3,000		—		(35)		2,965
Total AFS investment securities	$	3,902,762	$	6,359	$	(184,973)	$	3,724,148
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	1,676,275		2,292		(154,833)		1,523,734
Residential mortgage-related securities:
FNMA/FHLMC	930,148		26,023		(184,227)		771,944
GNMA	48,043		24		(3,609)		44,457
Private-label	341,153		9,399		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		12,068		(162,450)		628,928
GNMA	57,114		338		(7,270)		50,183
Total HTM investment securities	$	3,833,043	$	50,145	$	(581,903)	$	3,301,284

The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,984	$	—	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	94,008		23		(2,214)		91,817
Residential mortgage-related securities:
FNMA/FHLMC	1,274,052		294		(153,552)		1,120,794
GNMA	2,021,242		24,254		(2,822)		2,042,675
Commercial mortgage-related securities:
FNMA/FHLMC	18,691		—		(1,755)		16,937
GNMA	161,928		—		(7,135)		154,793
Asset backed securities:
FFELP	135,832		5		(1,862)		133,975
SBA	1,077		2		(28)		1,051
Other debt securities	3,000		—		(50)		2,950
Total AFS investment securities	$	3,749,814	$	24,579	$	(173,501)	$	3,600,892
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	1,682,473		5,638		(134,053)		1,554,059
Residential mortgage-related securities:
FNMA/FHLMC	941,973		27,007		(164,587)		804,393
GNMA	48,979		92		(2,901)		46,170
Private-label	345,083		9,796		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		12,699		(160,781)		632,914
GNMA	59,733		386		(7,500)		52,619
Total HTM investment securities	$	3,860,235	$	55,619	$	(535,230)	$	3,380,624

Investment securities held to maturity

The amortized cost and fair values of AFS and HTM securities at March 31, 2024 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,985	$	—	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	83,823		1		(2,995)		80,830
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		221		(156,880)		1,090,998
GNMA	2,219,058		6,114		(10,658)		2,214,513
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		—		(1,595)		17,008
GNMA	159,523		—		(7,291)		152,232
Asset backed securities:
FFELP	130,196		22		(1,065)		129,154
SBA	916		1		(28)		890
Other debt securities	3,000		—		(35)		2,965
Total AFS investment securities	$	3,902,762	$	6,359	$	(184,973)	$	3,724,148
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	1,676,275		2,292		(154,833)		1,523,734
Residential mortgage-related securities:
FNMA/FHLMC	930,148		26,023		(184,227)		771,944
GNMA	48,043		24		(3,609)		44,457
Private-label	341,153		9,399		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		12,068		(162,450)		628,928
GNMA	57,114		338		(7,270)		50,183
Total HTM investment securities	$	3,833,043	$	50,145	$	(581,903)	$	3,301,284

The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows:

($ in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
AFS investment securities
U.S. Treasury securities	$	39,984	$	—	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	94,008		23		(2,214)		91,817
Residential mortgage-related securities:
FNMA/FHLMC	1,274,052		294		(153,552)		1,120,794
GNMA	2,021,242		24,254		(2,822)		2,042,675
Commercial mortgage-related securities:
FNMA/FHLMC	18,691		—		(1,755)		16,937
GNMA	161,928		—		(7,135)		154,793
Asset backed securities:
FFELP	135,832		5		(1,862)		133,975
SBA	1,077		2		(28)		1,051
Other debt securities	3,000		—		(50)		2,950
Total AFS investment securities	$	3,749,814	$	24,579	$	(173,501)	$	3,600,892
HTM investment securities
U.S. Treasury securities	$	999	$	—	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	1,682,473		5,638		(134,053)		1,554,059
Residential mortgage-related securities:
FNMA/FHLMC	941,973		27,007		(164,587)		804,393
GNMA	48,979		92		(2,901)		46,170
Private-label	345,083		9,796		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		12,699		(160,781)		632,914
GNMA	59,733		386		(7,500)		52,619
Total HTM investment securities	$	3,860,235	$	55,619	$	(535,230)	$	3,380,624

Amortized cost and fair values of investment securities by contractual maturity

The expected maturities of AFS and HTM securities at March 31, 2024, are shown below:

	AFS					HTM
($ in thousands)	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Due in one year or less	$	1,915	$	1,902		$	11,061	$	11,011
Due after one year through five years	47,142		42,470			58,092		57,522
Due after five years through ten years	50,863		48,613			166,954		162,309
Due after ten years	26,888		26,368			1,441,167		1,293,862
Total debt securities	126,808		119,353			1,677,274		1,524,703
Residential mortgage-related securities:
FNMA/FHLMC	1,247,657		1,090,998			930,148		771,944
GNMA	2,219,058		2,214,513			48,043		44,457
Private-label	—		—			341,153		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	18,603		17,008			779,310		628,928
GNMA	159,523		152,232			57,114		50,183
Asset backed securities:
FFELP	130,196		129,154			—		—
SBA	916		890			—		—
Total investment securities	$	3,902,762	$	3,724,148		$	3,833,043	$	3,301,284
Ratio of fair value to amortized cost			95.4		%			86.1		%

Debt Securities, Held-to-maturity, Credit Quality Indicator

The following table summarizes the credit quality indicators of HTM securities at amortized cost at March 31, 2024:

($ in thousands)	AAA		AA		A		Not Rated		Total
U.S. Treasury securities	$	999	$	—	$	—	$	—	$	999
Obligations of state and political subdivisions (municipal securities)	768,220		901,215		5,685		1,154		1,676,275
Residential mortgage-related securities:
FNMA/FHLMC	930,148		—		—		—		930,148
GNMA	48,043		—		—		—		48,043
Private-label	341,153		—		—		—		341,153
Commercial mortgage-related securities:
FNMA/FHLMC	779,310		—		—		—		779,310
GNMA	57,114		—		—		—		57,114
Total HTM securities	$	2,924,988	$	901,215	$	5,685	$	1,154	$	3,833,043

The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2023:

($ in thousands)	AAA		AA		A		Not Rated		Total
U.S. Treasury securities	$	999	$	—	$	—	$	—	$	999
Obligations of state and political subdivisions (municipal securities)	760,329		915,303		5,687		1,155		1,682,473
Residential mortgage-related securities:
FNMA/FHLMC	941,973		—		—		—		941,973
GNMA	48,979		—		—		—		48,979
Private-label	345,083		—		—		—		345,083
Commercial mortgage-related securities:
FNMA/FHLMC	780,995		—		—		—		780,995
GNMA	59,733		—		—		—		59,733
Total HTM securities	$	2,938,090	$	915,303	$	5,687	$	1,155	$	3,860,235

Realized gains and losses and proceeds from sale

The following table summarizes gross realized gains and losses on AFS securities, the gain on sale and net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three months ended March 31, 2024 and 2023:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Gross realized (losses) on AFS securities	$	(197)	$	—
Gain on sale and net write-up (down) of equity securities	4,076		51
Investment securities gains (losses), net	$	3,879	$	51
Proceeds from sales of AFS investment securities	$	9,472	$	—

During the first quarter of 2024, the Corporation sold its remaining Visa Class B restricted shares at a gain of $4 million.

Unrealized losses and fair value of available for sale and held to maturity securities, by investment category and time length

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 March 31, 2024:

	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
U.S. Treasury securities	—	$	—	$	—	1	$	(4,427)	$	35,558	$	(4,427)	$	35,558
Obligations of state and political subdivisions (municipal securities)	27	(218)		13,847		108	(2,777)		64,217		(2,995)		78,064
Residential mortgage-related securities:
FNMA/FHLMC	24	(694)		31,375		71	(156,185)		1,045,343		(156,880)		1,076,718
GNMA	59	(7,016)		1,122,930		10	(3,643)		105,462		(10,658)		1,228,391
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,595)		17,008		(1,595)		17,008
GNMA	1	(337)		13,668		30	(6,954)		138,564		(7,291)		152,232
Asset backed securities:
FFELP	2	(116)		40,177		12	(949)		75,411		(1,065)		115,588
SBA	—	—		—		5	(28)		677		(28)		677
Other debt securities	1	(7)		993		2	(28)		1,972		(35)		2,965
Total	114	$	(8,388)	$	1,222,990	240	$	(176,585)	$	1,484,212	$	(184,973)	$	2,707,201
HTM investment securities
U.S. Treasury securities	—	$	—	$	—	1	$	(30)	$	969	$	(30)	$	969
Obligations of state and political subdivisions (municipal securities)	287	(2,536)		324,576		653	(152,297)		916,225		(154,833)		1,240,801
Residential mortgage-related securities:
FNMA/FHLMC	5	(40)		3,489		113	(184,186)		768,182		(184,227)		771,671
GNMA	6	(99)		8,674		79	(3,511)		34,346		(3,609)		43,020
Private-label	—	—		—		18	(69,484)		281,069		(69,484)		281,069
Commercial mortgage-related securities:
FNMA/FHLMC	1	(263)		8,003		44	(162,187)		620,926		(162,450)		628,928
GNMA	—	—		—		13	(7,270)		50,183		(7,270)		50,183
Total	299	$	(2,938)	$	344,741	921	$	(578,965)	$	2,671,899	$	(581,903)	$	3,016,640

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, 2023:

	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
U.S. Treasury securities	—	$	—	$	—	1	$	(4,083)	$	35,902	$	(4,083)	$	35,902
Obligations of state and political subdivisions (municipal securities)	41	(347)		23,762		92	(1,867)		53,022		(2,214)		76,784
Residential mortgage-related securities:
FNMA/FHLMC	18	(333)		22,870		71	(153,219)		1,080,337		(153,552)		1,103,207
GNMA	13	(924)		156,847		5	(1,898)		26,643		(2,822)		183,490
Commercial mortgage-related securities:
FNMA/FHLMC	—	—		—		1	(1,755)		16,937		(1,755)		16,937
GNMA	9	(3,160)		103,055		22	(3,975)		51,738		(7,135)		154,793
Asset backed securities:
FFELP	—	—		—		14	(1,862)		125,339		(1,862)		125,339
SBA	—	—		—		5	(28)		761		(28)		761
Other debt securities	1	(9)		991		2	(42)		1,958		(50)		2,950
Total	82	$	(4,773)	$	307,527	213	$	(168,728)	$	1,392,635	$	(173,501)	$	1,700,162
HTM investment securities
U.S. Treasury securities	—	$	—	$	—	1	$	(36)	$	963	$	(36)	$	963
Obligations of state and political subdivisions (municipal securities)	182	(1,535)		180,270		537	(132,518)		792,940		(134,053)		973,210
Residential mortgage-related securities:
FNMA/FHLMC	20	(511)		30,323		94	(164,076)		771,042		(164,587)		801,365
GNMA	2	(17)		2,128		78	(2,884)		34,626		(2,901)		36,754
Private-label	—	—		—		18	(65,372)		289,507		(65,372)		289,507
Commercial mortgage-related securities:
FNMA/FHLMC	1	(121)		8,144		44	(160,660)		624,770		(160,781)		632,914
GNMA	—	—		—		13	(7,500)		52,619		(7,500)		52,619
Total	205	$	(2,184)	$	220,865	785	$	(533,046)	$	2,566,468	$	(535,230)	$	2,787,333

XML

Loans Loans (Tables)

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Loan composition

The period end loan composition was as follows:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commercial and industrial	$	9,858,329	$	9,731,555
Commercial real estate — owner occupied	1,095,894		1,061,700
Commercial and business lending	10,954,223		10,793,255
Commercial real estate — investor	5,035,195		5,124,245
Real estate construction	2,287,041		2,271,398
Commercial real estate lending	7,322,237		7,395,644
Total commercial	18,276,460		18,188,898
Residential mortgage	7,868,180		7,864,891
Auto finance	2,471,257		2,256,162
Home equity	619,764		628,526
Other consumer	258,603		277,740
Total consumer	11,217,802		11,027,319
Total loans	$	29,494,263	$	29,216,218

Loans, Credit Quality Indicator by Vintage Year

The following table presents loans by credit quality indicator by origination year at March 31, 2024:

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	279	$	1,732,197	$	318,587	$	1,758,151	$	2,806,636	$	1,701,638	$	380,164	$	774,950	$	9,472,322
Special mention	—		14,287		—		13,305		24,216		27,909		3,392		865		83,973
Substandard	434		23,288		44,013		2,283		82,394		59,491		17,184		1,138		229,791
Nonaccrual	3,157		—		2,938		12,629		14,495		17,599		—		24,582		72,243
Commercial and industrial	$	3,869	$	1,769,772	$	365,538	$	1,786,369	$	2,927,740	$	1,806,637	$	400,739	$	801,535	$	9,858,329
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	11,455	$	56,257	$	196,065	$	191,357	$	234,852	$	133,883	$	218,224	$	1,042,093
Special mention	—		94		—		—		—		—		—		—		94
Substandard	—		950		2,667		18,003		2,083		12,376		8,423		7,114		51,616
Nonaccrual	—		—		722		1,368		—		—		—		—		2,090
Commercial real estate - owner occupied	$	—	$	12,500	$	59,646	$	215,436	$	193,440	$	247,228	$	142,306	$	225,339	$	1,095,894
Commercial and business lending:
Risk rating:
Pass	$	279	$	1,743,652	$	374,844	$	1,954,216	$	2,997,992	$	1,936,490	$	514,047	$	993,174	$	10,514,415
Special mention	—		14,381		—		13,305		24,216		27,909		3,392		865		84,068
Substandard	434		24,239		46,680		20,286		84,477		71,867		25,606		8,252		281,408
Nonaccrual	3,157		—		3,659		13,997		14,495		17,599		—		24,582		74,333
Commercial and business lending	$	3,869	$	1,782,272	$	425,184	$	2,001,805	$	3,121,180	$	2,053,865	$	543,045	$	1,026,873	$	10,954,223
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	131,383	$	196,066	$	1,162,643	$	1,274,328	$	1,014,759	$	418,534	$	550,600	$	4,748,313
Special mention	—		502		—		—		22,494		9,238		—		35,614		67,848
Substandard	—		—		38,662		94,918		33,540		25,949		975		6,293		200,338
Nonaccrual	—		—		—		—		—		—		—		18,697		18,697
Commercial real estate - investor	$	—	$	131,886	$	234,727	$	1,257,561	$	1,330,362	$	1,049,946	$	419,509	$	611,204	$	5,035,195
Real estate construction:
Risk rating:
Pass	$	—	$	24,266	$	58,519	$	474,768	$	1,177,598	$	494,047	$	45,034	$	12,792	$	2,287,023
Nonaccrual	—		—		—		—		—		—		—		18		18
Real estate construction	$	—	$	24,266	$	58,519	$	474,768	$	1,177,598	$	494,047	$	45,034	$	12,810	$	2,287,041
Commercial real estate lending:
Risk rating:
Pass	$	—	$	155,649	$	254,585	$	1,637,410	$	2,451,926	$	1,508,806	$	463,568	$	563,392	$	7,035,336
Special mention	—		502		—		—		22,494		9,238		—		35,614		67,848
Substandard	—		—		38,662		94,918		33,540		25,949		975		6,293		200,338
Nonaccrual	—		—		—		—		—		—		—		18,715		18,715
Commercial real estate lending	$	—	$	156,151	$	293,246	$	1,732,329	$	2,507,960	$	1,543,993	$	464,543	$	624,014	$	7,322,237
Total commercial:
Risk rating:
Pass	$	279	$	1,899,301	$	629,429	$	3,591,627	$	5,449,918	$	3,445,296	$	977,615	$	1,556,566	$	17,549,751
Special mention	—		14,883		—		13,305		46,710		37,146		3,392		36,480		151,916
Substandard	434		24,239		85,342		115,205		118,017		97,816		26,582		14,545		481,745
Nonaccrual	3,157		—		3,659		13,997		14,495		17,599		—		43,297		93,047
Total commercial	$	3,869	$	1,938,423	$	718,430	$	3,734,133	$	5,629,140	$	3,597,858	$	1,007,588	$	1,650,888	$	18,276,460

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	23,550	$	396,223	$	1,657,013	$	2,086,129	$	1,389,566	$	2,244,891	$	7,797,372
Special mention	—		—		—		—		—		—		—		94		94
Substandard	—		—		—		467		92		—		—		199		759
Nonaccrual	—		—		877		1,264		10,501		9,712		8,575		39,026		69,954
Residential mortgage	$	—	$	—	$	24,427	$	397,954	$	1,667,606	$	2,095,841	$	1,398,141	$	2,284,210	$	7,868,180
Auto finance:
Risk rating:
Pass	$	—	$	—	$	384,126	$	1,133,964	$	874,922	$	68,423	$	137	$	352	$	2,461,925
Special mention	—		—		—		634		1,398		117		—		—		2,148
Substandard	—		—		—		26		—		—		—		—		26
Nonaccrual	—		—		21		1,682		4,898		554		—		2		7,158
Auto finance	$	—	$	—	$	384,147	$	1,136,306	$	881,218	$	69,094	$	137	$	354	$	2,471,257
Home equity:
Risk rating:
Pass	$	3,830	$	514,998	$	21	$	1,508	$	29,539	$	5,949	$	2,278	$	56,995	$	611,286
Special mention	17		53		—		46		38		—		—		175		312
Substandard	—		—		—		9		—		—		—		56		65
Nonaccrual	505		76		31		—		671		141		120		7,061		8,100
Home equity	$	4,352	$	515,127	$	51	$	1,563	$	30,248	$	6,090	$	2,398	$	64,286	$	619,764
Other consumer:
Risk rating:
Pass	$	75	$	186,540	$	1,489	$	4,995	$	2,823	$	1,474	$	781	$	57,722	$	255,824
Special mention	3		850		—		14		24		6		7		3		904
Substandard	—		1,788		—		—		—		—		—		—		1,788
Nonaccrual	4		61		—		9		7		—		—		11		87
Other consumer	$	82	$	189,238	$	1,489	$	5,018	$	2,854	$	1,480	$	788	$	57,735	$	258,603
Total consumer:
Risk rating:
Pass	$	3,905	$	701,538	$	409,186	$	1,536,690	$	2,564,297	$	2,161,975	$	1,392,762	$	2,359,959	$	11,126,407
Special mention	20		904		—		694		1,459		123		7		272		3,459
Substandard	—		1,788		—		502		92		—		—		255		2,637
Nonaccrual	509		137		928		2,955		16,077		10,407		8,695		46,100		85,299
Total consumer	$	4,434	$	704,365	$	410,115	$	1,540,841	$	2,581,926	$	2,172,506	$	1,401,464	$	2,406,586	$	11,217,802
Total loans:
Risk rating:
Pass	$	4,184	$	2,600,839	$	1,038,615	$	5,128,316	$	8,014,215	$	5,607,272	$	2,370,376	$	3,916,525	$	28,676,159
Special mention	20		15,787		—		13,999		48,169		37,270		3,399		36,752		155,375
Substandard	434		26,026		85,342		115,707		118,109		97,816		26,582		14,800		484,383
Nonaccrual	3,666		137		4,588		16,952		30,572		28,007		8,695		89,396		178,346
Total loans	$	8,303	$	2,642,788	$	1,128,545	$	5,274,974	$	8,211,066	$	5,770,365	$	2,409,052	$	4,057,474	$	29,494,263

(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, 2023:

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Commercial and industrial:
Risk rating:
Pass	$	1,380	$	1,693,249	$	1,736,617	$	2,877,173	$	1,824,362	$	398,046	$	383,695	$	449,006	$	9,362,149
Special mention	—		21,779		4,017		46,610		8,525		3,529		—		25,341		109,801
Substandard	804		81,924		10,515		39,748		47,279		17,732		94		291		197,582
Nonaccrual	6,414		—		13,317		14,188		33,891		627		—		—		62,022
Commercial and industrial	$	8,598	$	1,796,951	$	1,764,466	$	2,977,719	$	1,914,057	$	419,934	$	383,789	$	474,638	$	9,731,555
Commercial real estate - owner occupied:
Risk rating:
Pass	$	—	$	15,393	$	204,039	$	188,003	$	239,218	$	136,535	$	135,730	$	92,339	$	1,011,259
Special mention	—		271		—		—		6,150		2,635		—		1,293		10,349
Substandard	—		292		14,735		2,791		6,416		8,537		3,086		2,841		38,699
Nonaccrual	—		—		1,394		—		—		—		—		—		1,394
Commercial real estate - owner occupied	$	—	$	15,957	$	220,168	$	190,794	$	251,783	$	147,708	$	138,816	$	96,473	$	1,061,700
Commercial and business lending:
Risk rating:
Pass	$	1,380	$	1,708,642	$	1,940,657	$	3,065,177	$	2,063,580	$	534,581	$	519,426	$	541,345	$	10,373,408
Special mention	—		22,050		4,017		46,610		14,675		6,164		—		26,634		120,150
Substandard	804		82,216		25,250		42,539		53,695		26,269		3,180		3,132		236,281
Nonaccrual	6,414		—		14,710		14,188		33,891		627		—		—		63,416
Commercial and business lending	$	8,598	$	1,812,909	$	1,984,635	$	3,168,514	$	2,165,840	$	567,642	$	522,606	$	571,111	$	10,793,255
Commercial real estate - investor:
Risk rating:
Pass	$	—	$	155,109	$	1,263,866	$	1,247,434	$	1,080,425	$	471,371	$	358,996	$	239,230	$	4,816,433
Special mention	—		502		4,248		25,474		26,208		—		29,772		6,014		92,218
Substandard	—		—		106,002		69,584		15,000		983		—		24,025		215,595
Commercial real estate - investor	$	—	$	155,611	$	1,374,116	$	1,342,492	$	1,121,633	$	472,355	$	388,768	$	269,269	$	5,124,245
Real estate construction:
Risk rating:
Pass	$	—	$	23,307	$	422,277	$	1,176,608	$	547,825	$	87,680	$	5,740	$	7,954	$	2,271,392
Nonaccrual	—		—		—		—		—		—		—		6		6
Real estate construction	$	—	$	23,307	$	422,277	$	1,176,608	$	547,825	$	87,680	$	5,740	$	7,960	$	2,271,398
Commercial real estate lending:
Risk rating:
Pass	$	—	$	178,416	$	1,686,143	$	2,424,042	$	1,628,250	$	559,052	$	364,737	$	247,184	$	7,087,824
Special mention	—		502		4,248		25,474		26,208		—		29,772		6,014		92,218
Substandard	—		—		106,002		69,584		15,000		983		—		24,025		215,595
Nonaccrual	—		—		—		—		—		—		—		6		6
Commercial real estate lending	$	—	$	178,918	$	1,796,393	$	2,519,100	$	1,669,458	$	560,035	$	394,508	$	277,230	$	7,395,644

					Term Loans Amortized Cost Basis by Origination Year(a)
($ in thousands)	Rev Loans Converted to Term(a)		Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Total commercial:
Risk rating:
Pass	$	1,380	$	1,887,058	$	3,626,800	$	5,489,219	$	3,691,830	$	1,093,633	$	884,162	$	788,529	$	17,461,232
Special mention	—		22,552		8,265		72,084		40,882		6,164		29,772		32,648		212,368
Substandard	804		82,216		131,253		112,123		68,695		27,253		3,180		27,157		451,876
Nonaccrual	6,414		—		14,710		14,188		33,891		627		—		6		63,422
Total commercial	$	8,598	$	1,991,827	$	3,781,028	$	5,687,614	$	3,835,298	$	1,127,677	$	917,114	$	848,341	$	18,188,898
Residential mortgage:
Risk rating:
Pass	$	—	$	—	$	352,321	$	1,617,409	$	2,110,577	$	1,414,186	$	647,778	$	1,650,542	$	7,792,813
Special mention	—		—		—		—		—		—		95		57		152
Substandard	—		—		490		93		—		—		174		26		784
Nonaccrual	—		—		1,425		9,567		9,259		10,397		6,628		33,865		71,142
Residential mortgage	$	—	$	—	$	354,236	$	1,627,070	$	2,119,836	$	1,424,583	$	654,675	$	1,684,490	$	7,864,891
Auto finance:
Risk rating:
Pass	$	—	$	—	$	1,218,820	$	952,839	$	75,209	$	163	$	456	$	132	$	2,247,618
Special mention	—		—		619		1,850		205		—		—		—		2,674
Substandard	—		—		—		73		—		—		—		—		73
Nonaccrual	—		—		1,032		4,332		430		—		3		—		5,797
Auto finance	$	—	$	—	$	1,220,471	$	959,094	$	75,844	$	163	$	458	$	132	$	2,256,162
Home equity:
Risk rating:
Pass	$	8,703	$	521,000	$	1,678	$	29,863	$	6,084	$	2,327	$	4,891	$	53,350	$	619,192
Special mention	179		200		—		87		—		29		15		378		708
Substandard	10		75		10		—		—		—		33		—		118
Nonaccrual	1,302		160		29		495		132		144		368		7,180		8,508
Home equity	$	10,195	$	521,434	$	1,717	$	30,445	$	6,217	$	2,500	$	5,308	$	60,907	$	628,526
Other consumer:
Risk rating:
Pass	$	121	$	196,632	$	6,419	$	3,732	$	2,658	$	1,127	$	460	$	64,121	$	275,149
Special mention	26		843		9		—		3		20		—		6		881
Substandard	—		1,582		—		—		—		—		—		—		1,582
Nonaccrual	27		71		10		1		6		2		8		29		128
Other consumer	$	174	$	199,129	$	6,438	$	3,733	$	2,668	$	1,149	$	468	$	64,156	$	277,740
Total consumer:
Risk rating:
Pass	$	8,824	$	717,632	$	1,579,238	$	2,603,843	$	2,194,529	$	1,417,802	$	653,584	$	1,768,145	$	10,934,773
Special mention	205		1,043		628		1,936		208		49		110		441		4,416
Substandard	10		1,656		500		166		—		—		207		26		2,556
Nonaccrual	1,330		231		2,496		14,396		9,827		10,544		7,007		41,073		85,574
Total consumer	$	10,369	$	720,563	$	1,582,862	$	2,620,341	$	2,204,564	$	1,428,395	$	660,909	$	1,809,685	$	11,027,319
Total loans:
Risk rating:
Pass	$	10,204	$	2,604,690	$	5,206,038	$	8,093,062	$	5,886,359	$	2,511,435	$	1,537,747	$	2,556,674	$	28,396,005
Special mention	205		23,595		8,893		74,020		41,091		6,213		29,882		33,089		216,784
Substandard	814		83,872		131,753		112,289		68,695		27,253		3,387		27,183		454,432
Nonaccrual	7,744		231		17,206		28,584		43,718		11,170		7,007		41,080		148,997
Total loans	$	18,966	$	2,712,389	$	5,363,890	$	8,307,956	$	6,039,862	$	2,556,071	$	1,578,023	$	2,658,026	$	29,216,218

(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 three months ended March 31, 2024:

			Gross Charge Offs by Origination Year
($ in thousands)	Rev Loans Amortized Cost Basis		YTD 2024		2023		2022		2021		2020		Prior		Total
Commercial and industrial	$	1,024	$	—	$	125	$	553	$	17,724	$	3	$	—	$	19,429
Commercial real estate-owner occupied	—		—		—		—		—		—		3		3
Commercial and business lending	1,024		—		125		553		17,724		3		3		19,432
Total commercial	1,024		—		125		553		17,724		3		3		19,432
Residential mortgage	—		—		40		—		—		2		47		89
Auto finance	—		—		767		1,675		158		—		—		2,600
Home equity	93		—		—		—		—		—		15		108
Other consumer	1,688		—		15		8		17		28		34		1,790
Total consumer	1,782		—		822		1,683		175		30		95		4,586
Total gross charge offs	$	2,806	$	—	$	947	$	2,236	$	17,899	$	33	$	98	$	24,018

The following table presents gross charge offs by origination year for the year ended December 31, 2023:

			Gross Charge Offs by Origination Year
($ in thousands)	Rev Loans Amortized Cost Basis		2023		2022		2021		2020		2019		Prior		Total
Commercial and industrial	$	4,130	$	717	$	9,594	$	25,270	$	5,958	$	—	$	18	$	45,687
Commercial real estate-owner occupied	—		—		—		—		—		25		—		25
Commercial and business lending	4,130		717		9,594		25,270		5,958		25		18		45,713
Commercial real estate-investor	—		—		—		—		—		—		252		252
Real estate construction	—		—		—		—		—		—		25		25
Commercial real estate lending	—		—		—		—		—		—		277		277
Total commercial	4,130		717		9,594		25,270		5,958		25		295		45,989
Residential mortgage	—		2		32		42		148		5		723		952
Auto finance	—		795		4,524		626		—		5		—		5,950
Home equity	53		21		3		31		—		22		294		424
Other consumer	4,884		—		72		124		131		72		170		5,453
Total consumer	4,937		818		4,630		823		279		105		1,187		12,779
Total gross charge offs	$	9,068	$	1,535	$	14,224	$	26,093	$	6,237	$	130	$	1,482	$	58,768

Loans, Past Due Status

The following table presents loans by past due status at March 31, 2024:

	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	$	9,785,140	$	371	$	150	$	426	$	72,243	$	9,858,329
Commercial real estate - owner occupied	1,093,804		—		—		—		2,090		1,095,894
Commercial and business lending	10,878,944		371		150		426		74,333		10,954,223
Commercial real estate - investor	4,997,335		—		19,164		—		18,697		5,035,195
Real estate construction	2,285,763		1,260		—		—		18		2,287,041
Commercial real estate lending	7,283,098		1,260		19,164		—		18,715		7,322,237
Total commercial	18,162,042		1,631		19,314		426		93,047		18,276,460
Residential mortgage	7,788,322		9,808		94		—		69,954		7,868,180
Auto finance	2,451,552		10,373		2,148		26		7,158		2,471,257
Home equity	608,821		2,506		312		24		8,100		619,764
Other consumer	254,313		1,298		963		1,942		87		258,603
Total consumer	11,103,009		23,985		3,517		1,992		85,299		11,217,802
Total loans	$	29,265,051	$	25,617	$	22,831	$	2,417	$	178,346	$	29,494,263

(a) Of the total nonaccrual loans, $98 million, or 55%, were current with respect to payment at March 31, 2024.

(b) No interest income was recognized on nonaccrual loans for the three months ended March 31, 2024. In addition, there were $20 million of nonaccrual loans for which there was no related ACLL at March 31, 2024.

The following table presents loans by past due status at December 31, 2023:

	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	$	9,663,587	$	5,374	$	191	$	380	$	62,022	$	9,731,555
Commercial real estate - owner occupied	1,059,948		—		358		—		1,394		1,061,700
Commercial and business lending	10,723,536		5,374		549		380		63,416		10,793,255
Commercial real estate - investor	5,086,117		—		18,697		19,432		—		5,124,245
Real estate construction	2,271,392		—		—		—		6		2,271,398
Commercial real estate lending	7,357,509		—		18,697		19,432		6		7,395,644
Total commercial	18,081,044		5,374		19,246		19,812		63,422		18,188,898
Residential mortgage	7,780,304		13,294		152		—		71,142		7,864,891
Auto finance	2,232,906		14,712		2,674		73		5,797		2,256,162
Home equity	615,810		3,500		708		—		8,508		628,526
Other consumer	273,644		1,233		932		1,803		128		277,740
Total consumer	10,902,664		32,739		4,467		1,876		85,574		11,027,319
Total loans	$	28,983,708	$	38,113	$	23,712	$	21,689	$	148,997	$	29,216,218

(a) Of the total nonaccrual loans, $80 million, or 53%, were current with respect to payment at December 31, 2023.

(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2023. In addition, there were $23 million of nonaccrual loans for which there was no related ACLL at December 31, 2023.

Loans, 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 during the three months ended March 31, 2024 and March 31, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at March 31, 2024.

	Interest Rate Concession
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Commercial and industrial	$	159	$	47
Auto	46		61
Home equity	—		31
Other consumer	534		498
Total loans modified	$	739	$	637

	Term Extension
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Residential mortgage	$	—	$	209
Total loans modified	$	—	$	209

	Combination - Interest Rate Concession and Term Extension
	Amortized Cost
($ in thousands)	March 31, 2024		March 31, 2023
Residential mortgage	$	643	$	165
Home equity	31		93
Total loans modified	$	674	$	258

The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans as of March 31, 2024 and March 31, 2023:

	Interest Rate Concession
	Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
Loan Type	March 31, 2024		March 31, 2023
Commercial and industrial	(16)	%	(16)	%
Residential mortgage	3	%	—	%
Auto	(9)	%	(2)	%
Home equity	(3)	%	1	%
Other consumer	(21)	%	(20)	%
Weighted average of total loans modified	(9)	%	(17)	%

(a) Due to market conditions, some interest rate concessions on floating rate loans may involve an increase in rate that was lower in comparison to the rate of increase for floating rate loans not modified.

	Term Extension
	Financial Effect, Weighted Average Term Increase(a)
Loan Type	March 31, 2024	March 31, 2023
Residential mortgage	158 months	26 months
Home equity	64 months	0 months
Weighted average of total loans modified	153 months	26 months

Loans, Modifications in Last 12 Months, Performance

The following table depicts the performance of loans that have been modified in the twelve months ended March 31, 2024:

	Payment Status (Amortized Cost Basis)
($ in thousands)	Current		30-89 Days Past Due		90+ Days Past Due		Nonaccrual
Commercial and industrial	$	377	$	—	$	—	$	—
Residential mortgage	345		—		—		991
Auto	63		3		—		11
Home equity	135		47		—		139
Other consumer	1,487		—		—		—
Total loans modified	$	2,407	$	50	$	—	$	1,141

The following table depicts the performance of loans that have been modified in the three months ended March 31, 2023:

	Payment Status (Amortized Cost Basis)
($ in thousands)	Current		30-89 Days Past Due		90+ Days Past Due		Nonaccrual
Commercial and industrial	$	47	$	—	$	—	$	—
Residential mortgage	126		—		—		248
Auto	61		—		—		—
Home equity	31		—		—		93
Other consumer	498		—		—		—
Total loans modified	$	763	$	—	$	—	$	341

Loans, Modified, Subsequent Default

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous twelve months and subsequently had a payment default during the three months ended March 31, 2024:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
($ in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Auto	$	11	$	—	$	—
Total loans modified	$	11	$	—	$	—

The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous three months and subsequently had a payment default during the three months ended March 31, 2023:

	Amortized Cost of Loan Modifications that Subsequently Defaulted
($ in thousands)	Interest Rate Concession		Term Extension		Combination Interest Rate Reduction and Term Extension
Home equity	$	—	$	—	$	60
Total loans modified	$	—	$	—	$	60

Loans, Changes in AFLL by Portfolio Segment

The following table presents a summary of the changes in the ACLL by portfolio segment for the three months ended March 31, 2024:

($ in thousands)	Dec 31, 2023		Charge offs		Recoveries		Net Charge offs		Provision for credit losses		Mar 31, 2024		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	128,263	$	(19,429)	$	791	$	(18,638)	$	23,202	$	132,826
Commercial real estate — owner occupied	10,610		(3)		5		2		1,768		12,381
Commercial and business lending	138,873		(19,432)		796		(18,636)		24,970		145,207
Commercial real estate — investor	67,858		—		—		—		4,137		71,995
Real estate construction	53,554		—		30		30		(4,281)		49,303
Commercial real estate lending	121,412		—		30		30		(144)		121,298
Total commercial	260,285		(19,432)		826		(18,606)		24,826		266,506
Residential mortgage	37,808		(89)		27		(62)		(1,831)		35,915
Auto finance	24,961		(2,600)		506		(2,094)		3,248		26,114
Home equity	15,403		(108)		319		211		(874)		14,740
Other consumer	12,638		(1,790)		252		(1,537)		1,630		12,731
Total consumer	90,809		(4,586)		1,104		(3,482)		2,174		89,501
Total loans	$	351,094	$	(24,018)	$	1,930	$	(22,088)	$	27,000	$	356,006
Allowance for unfunded commitments
Commercial and industrial	$	13,319	$	—	$	—	$	—	$	(757)	$	12,562
Commercial real estate — owner occupied	149		—		—		—		15		164
Commercial and business lending	13,468		—		—		—		(742)		12,725
Commercial real estate — investor	480		—		—		—		37		517
Real estate construction	17,024		—		—		—		(2,103)		14,921
Commercial real estate lending	17,504		—		—		—		(2,066)		15,438
Total commercial	30,972		—		—		—		(2,808)		28,164
Home equity	2,629		—		—		—		(316)		2,313
Other consumer	1,174		—		—		—		124		1,298
Total consumer	3,803		—		—		—		(192)		3,612
Total loans	$	34,776	$	—	$	—	$	—	$	(3,000)	$	31,776
Allowance for credit losses on loans
Commercial and industrial	$	141,582	$	(19,429)	$	791	$	(18,638)	$	22,445	$	145,388	1.47	%
Commercial real estate — owner occupied	10,759		(3)		5		2		1,783		12,544		1.14	%
Commercial and business lending	152,341		(19,432)		796		(18,636)		24,227		157,933		1.44	%
Commercial real estate — investor	68,338		—		—		—		4,174		72,512		1.44	%
Real estate construction	70,578		—		30		30		(6,383)		64,225		2.81	%
Commercial real estate lending	138,916		—		30		30		(2,209)		136,737		1.87	%
Total commercial	291,257		(19,432)		826		(18,606)		22,018		294,669		1.61	%
Residential mortgage	37,808		(89)		27		(62)		(1,831)		35,915		0.46	%
Auto finance	24,961		(2,600)		506		(2,094)		3,248		26,114		1.06	%
Home equity	18,032		(108)		319		211		(1,190)		17,054		2.75	%
Other consumer	13,812		(1,790)		252		(1,537)		1,755		14,029		5.43	%
Total consumer	94,613		(4,586)		1,104		(3,482)		1,982		93,112		0.83	%
Total loans	$	385,870	$	(24,018)	$	1,930	$	(22,088)	$	24,000	$	387,782	1.31	%

The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2023:

($ in thousands)	Dec 31, 2022		Charge offs		Recoveries		Net Charge offs		Provision for credit losses		Dec 31, 2023		ACLL / Loans
Allowance for loan losses
Commercial and industrial	$	119,076	$	(45,687)	$	3,015	$	(42,672)	$	51,859	$	128,263
Commercial real estate — owner occupied	9,475		(25)		11		(15)		1,150		10,610
Commercial and business lending	128,551		(45,713)		3,026		(42,687)		53,009		138,873
Commercial real estate — investor	54,398		(252)		3,016		2,763		10,697		67,858
Real estate construction	45,589		(25)		80		55		7,910		53,554
Commercial real estate lending	99,986		(277)		3,095		2,819		18,607		121,412
Total commercial	228,538		(45,989)		6,121		(39,868)		71,616		260,285
Residential mortgage	38,298		(952)		541		(411)		(79)		37,808
Auto finance	19,619		(5,950)		1,241		(4,709)		10,051		24,961
Home equity	14,875		(424)		1,262		837		(310)		15,403
Other consumer	11,390		(5,453)		978		(4,475)		5,723		12,638
Total consumer	84,182		(12,779)		4,021		(8,758)		15,384		90,809
Total loans	$	312,720	$	(58,768)	$	10,142	$	(48,626)	$	87,000	$	351,094
Allowance for unfunded commitments
Commercial and industrial	$	12,997	$	—	$	—	$	—	$	321	$	13,319
Commercial real estate — owner occupied	103		—		—		—		46		149
Commercial and business lending	13,101		—		—		—		367		13,468
Commercial real estate — investor	710		—		—		—		(230)		480
Real estate construction	20,583		—		—		—		(3,558)		17,024
Commercial real estate lending	21,292		—		—		—		(3,788)		17,504
Total commercial	34,393		—		—		—		(3,421)		30,972
Home equity	2,699		—		—		—		(70)		2,629
Other consumer	1,683		—		—		—		(509)		1,174
Total consumer	4,382		—		—		—		(579)		3,803
Total loans	$	38,776	$	—	$	—	$	—	$	(4,000)	$	34,776
Allowance for credit losses on loans
Commercial and industrial	$	132,073	$	(45,687)	$	3,015	$	(42,672)	$	52,181	$	141,582	1.45	%
Commercial real estate — owner occupied	9,579		(25)		11		(15)		1,195		10,759		1.01	%
Commercial and business lending	141,652		(45,713)		3,026		(42,687)		53,376		152,341		1.41	%
Commercial real estate — investor	55,108		(252)		3,016		2,763		10,467		68,338		1.33	%
Real estate construction	66,171		(25)		80		55		4,351		70,578		3.11	%
Commercial real estate lending	121,279		(277)		3,095		2,819		14,819		138,916		1.88	%
Total commercial	262,931		(45,989)		6,121		(39,868)		68,195		291,257		1.60	%
Residential mortgage	38,298		(952)		541		(411)		(79)		37,808		0.48	%
Auto finance	19,619		(5,950)		1,241		(4,709)		10,051		24,961		1.11	%
Home equity	17,574		(424)		1,262		837		(380)		18,032		2.87	%
Other consumer	13,073		(5,453)		978		(4,475)		5,214		13,812		4.97	%
Total consumer	88,565		(12,779)		4,021		(8,758)		14,805		94,613		0.86	%
Total loans	$	351,496	$	(58,768)	$	10,142	$	(48,626)	$	83,000	$	385,870	1.32	%

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of core deposit intangibles and other intangibles

Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:

($ in thousands)	Three Months Ended March 31, 2024		Year Ended Dec 31, 2023
Core deposit intangibles
Gross carrying amount at the beginning of period	$	88,109	$	88,109
Accumulated amortization	(49,841)		(47,638)
Net book value	$	38,268	$	40,471
Amortization during the period	$	2,203	$	8,811

Summary of changes in balance of mortgage servicing rights asset and mortgage servicing rights valuation allowance

A summary of changes in the balance of the MSRs asset under the fair value measurement method for the three months ended March 31, 2024 and the year ended December 31, 2023 is as follows:

($ in thousands)	Three Months Ended March 31, 2024			Year Ended Dec 31, 2023
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$	84,390		$	77,351
Additions	877			3,564
Paydowns	(1,687)			(7,185)
Valuation:
Change in fair value model assumptions	—			8,881
Changes in fair value of asset	1,646			1,778
Mortgage servicing rights at end of period	$	85,226		$	84,390
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)(a)	$	6,349,049		$	7,364,492
Mortgage servicing rights to servicing portfolio(a)	1.34		%	1.15		%

(a) During the fourth quarter of 2023, the Corporation transferred $969 million of residential mortgages into held for sale and subsequently sold them for $844 million. After sale, the servicing was retained for a short period until full servicing was transferred to the purchaser in January 2024.

Summary of estimated future amortization expense

The following table shows the estimated future amortization expense for CDIs and decay for MSRs:

($ in thousands)	Core Deposit Intangibles		Mortgage Servicing Rights
Nine months ended December 31, 2024	$	6,608	$	6,930
2025	8,811		11,133
2026	8,811		11,013
2027	8,811		10,506
2028	3,485		9,628
2029	1,681		8,614
Beyond 2029	61		27,402
Total estimated amortization expense and MSRs decay	$	38,268	$	85,226

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Short and Long-Term Funding (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Breakdown of short & long-term debt balances

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)	Mar 31, 2024		Dec 31, 2023
Short-term funding
Federal funds purchased	$	175,135	$	220,160
Securities sold under agreements to repurchase	90,536		106,620
Federal funds purchased and securities sold under agreements to repurchase	265,671		326,780
BTFP funding	500,000		—
Total short-term funding	$	765,671	$	326,780
Long-term funding
Corporation subordinated notes, at par	$	550,000	$	550,000
Discount and capitalized costs	(7,468)		(7,748)
Subordinated debt fair value hedge(a)	(6,838)		(1,366)
Finance leases	361		383
Total long-term funding	$	536,055	$	541,269
Total short and long-term funding, excluding FHLB advances	$	1,301,726	$	868,049
FHLB advances
Short-term FHLB advances	$	138,000	$	740,000
Long-term FHLB advances	1,209,862		1,209,907
FHLB advances fair value hedge(a)	(14,451)		(9,713)
Total FHLB advances	$	1,333,411	$	1,940,194
Total short and long-term funding	$	2,635,137	$	2,808,243

(a) For additional information on the fair value hedges, see Note 9.

Remaining contractual maturity of securities sold under agreements to repurchase

The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets as of March 31, 2024 and December 31, 2023 are presented in the following table:

	Overnight and Continuous
($ in thousands)	Mar 31, 2024		Dec 31, 2023
Repurchase agreements
Agency mortgage-related securities	$	90,536	$	106,620

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Derivative and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary Of Other Derivative Instruments [Table Text Block]

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 as of March 31, 2024 and December 31, 2023. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of March 31, 2024 and December 31, 2023. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets.

	Mar 31, 2024								Dec 31, 2023
	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	$	1,350,000	$	2,164	$	1,750,000	$	10,685	$	2,300,000	$	8,075	$	550,000	$	930
Foreign currency exchange forwards	147,695		624		263,335		230		231,566		632		189,212		2,946
Total designated as hedging instruments			2,788				10,915				8,707				3,876
Not designated as hedging instruments:
Interest rate-related and other instruments	3,770,832		113,337		6,262,958		222,303		3,603,513		111,623		6,528,471		195,662
Foreign currency exchange forwards	115,002		5,276		88,602		4,956		87,526		2,954		135,654		2,746
Mortgage banking(a)	49,808		666		98,000		222		29,490		439		51,500		673
Total not designated as hedging instruments			119,279				227,482				115,016				199,082
Gross derivatives before netting			122,067				238,397				123,723				202,958
Less: Legally enforceable master netting agreements			6,463				6,463				18,234				18,234
Less: Cash collateral pledged/received			55,681				—				35,855				—
Total derivative instruments, after netting			$	59,923			$	231,934			$	69,634			$	184,724

(a) The notional amount of the mortgage derivative asset includes interest rate lock commitments, while the notional amount of the mortgage derivative liability includes forward commitments.

Balance Sheet Recording of Fair Value Hedge [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)	March 31, 2024				December 31, 2023
Other long-term funding	$	(543,162)	$	6,838	$	(548,634)	$	1,366
FHLB advances	(585,549)		14,451		(590,287)		9,713
Total	$	(1,128,711)	$	21,289	$	(1,138,921)	$	11,079

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At March 31, 2024 and December 31, 2023, the carrying amount excluded for foreign currency denominated loans was $411 million and $421 million, respectively.

Schedule of cash flow hedging instruments, statements of financial performance and financial position location

The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income for the three months ended March 31, 2024 and 2023:

	Location and Amount Recognized on the Consolidated Statements of Income in Fair Value and Cash Flow Hedging Relationships
	Three months ended Mar 31,
	2024				2023
($ in thousands)	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)	$	(4,863)	$	5,322	$	(1,321)	$	2,515
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items	(40)		(10,210)		(59)		10,724
Derivatives designated as hedging instruments(a)	(4,823)		15,532		(1,262)		(8,209)

(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 Mar 31,
	2024		2023
($ in thousands)	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	$	—	$	—
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items	(9,070)		1,802
Derivatives designated as hedging instruments	9,070		(1,802)

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) for the three months ended March 31, 2024 and 2023:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivative(a)	$	(19,461)	$	13,763
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)	4,823		1,262

(a) The entirety of gains (losses) recognized in OCI as well as the losses 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 for the three months ended March 31, 2024 and 2023:

	Consolidated Statements of Income Category of Gain / (Loss)  Recognized in Income	Three Months Ended Mar 31,
($ in thousands)		2024		2023
Derivative instruments
Interest rate-related and other instruments — customer and mirror, net	Capital markets, net	$	(71)	$	(70)
Interest rate-related instruments — MSRs hedge	Mortgage banking, net	(2,937)		2,521
Foreign currency exchange forwards	Capital markets, net	746		228
Interest rate lock commitments (mortgage)	Mortgage banking, net	227		252
Forward commitments (mortgage)	Mortgage banking, net	451		(395)

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Balance Sheet Offsetting (Tables)

3 Months Ended

Mar. 31, 2024

Offsetting [Abstract]

Balance sheet offsetting of derivative assets and liabilities

The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of March 31, 2024 and December 31, 2023. 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 this table:

	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
March 31, 2024	$	102,956	$	(6,463)	$	(55,681)	$	40,812	$	(32,683)	$	8,129
December 31, 2023	87,075		(18,234)		(35,855)		32,985		(32,985)		—
	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
March 31, 2024	$	17,172	$	(6,463)	$	—	$	10,709	$	—	$	10,709
December 31, 2023	18,767		(18,234)		—		533		—		533

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

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Summary of lending-related and other commitments

The following is a summary of lending-related commitments:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)	$	10,828,869	$	11,170,147
Commercial letters of credit(a)	4,580		3,697
Standby letters of credit(c)	230,396		212,029

(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 March 31, 2024 or December 31, 2023.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 9.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2 million at both March 31, 2024 and December 31, 2023, 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)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Allowance for unfunded commitments
Balance at beginning of period	$	34,776	$	38,776
Provision for unfunded commitments	(3,000)		(4,000)
Balance at end of period	$	31,776	$	34,776

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

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 as of March 31, 2024 and December 31, 2023, aggregated by the level in the fair value hierarchy within which those measurements fall:

	Mar 31, 2024
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	429,859	$	429,859	$	429,859	$	—	$	—
Interest-bearing deposits in other financial institutions	420,114		420,114		420,114		—		—
Federal funds sold and securities purchased under agreements to resell	1,610		1,610		1,610		—		—
AFS investment securities:
U.S. Treasury securities	35,558		35,558		35,558		—		—
Obligations of state and political subdivisions (municipal securities)	80,830		80,830		—		80,830		—
Residential mortgage-related securities:
FNMA / FHLMC	1,090,998		1,090,998		—		1,090,998		—
GNMA	2,214,513		2,214,513		—		2,214,513		—
Commercial mortgage-related securities:
FNMA / FHLMC	17,008		17,008		—		17,008		—
GNMA	152,232		152,232		—		152,232		—
Asset backed securities:
FFELP	129,154		129,154		—		129,154		—
SBA	890		890		—		890		—
Other debt securities	2,965		2,965		—		2,965		—
Total AFS investment securities	3,724,148		3,724,148		35,558		3,688,590		—
HTM investment securities:
U.S. Treasury securities	999		969		969		—		—
Obligations of state and political subdivisions (municipal securities), net	1,676,199		1,523,658		—		1,523,658		—
Residential mortgage-related securities:
FNMA / FHLMC	930,148		771,944		—		771,944		—
GNMA	48,043		44,457		—		44,457		—
Private-label	341,153		281,069		—		281,069		—
Commercial mortgage-related securities:
FNMA / FHLMC	779,310		628,928		—		628,928		—
GNMA	57,114		50,183		—		50,183		—
Total HTM investment securities, net	3,832,967		3,301,209		969		3,300,239		—
Equity securities:
Equity securities	7,071		7,071		6,966		—		105
Equity securities at NAV	12,500		12,500
Total equity securities	19,571		19,571
FHLB and Federal Reserve Bank stocks	173,968		173,968		—		173,968		—
Residential loans held for sale	52,414		52,414		—		52,414		—
Loans, net	29,138,257		27,739,448		—		—		27,739,448
Bank and corporate owned life insurance	685,089		685,089		—		685,089		—
Mortgage servicing rights, net	85,226		85,226		—		—		85,226
Interest rate-related instruments designated as hedging instruments(a)	2,164		2,164		—		2,164		—
Foreign currency exchange forwards designated as hedging instruments(a)	624		624		—		624		—
Interest rate-related and other instruments not designated as hedging instruments(a)	113,337		113,337		—		113,337		—
Foreign currency exchange forwards not designated as hedging instruments(a)	5,276		5,276		—		5,276		—
Interest rate lock commitments to originate residential mortgage loans held for sale	666		666		—		—		666
Total selected assets at fair value	$	38,685,290	$	36,754,723	$	895,077	$	8,021,701	$	27,825,445

(a) Figures are presented gross before netting. See Note 9 and Note 10 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.

	Mar 31, 2024
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Noninterest-bearing demand	$	6,254,135	$	6,254,135	$	—	$	—	$	6,254,135
Savings	5,124,639		5,124,639		—		—		5,124,639
Interest-bearing demand	8,747,127		8,747,127		—		—		8,747,127
Money market	6,721,674		6,721,674		—		—		6,721,674
Brokered CDs(a)	3,931,230		3,931,230		—		3,931,230		—
Other time deposits(a)	2,934,352		2,934,352		—		2,934,352		—
Total deposits	33,713,158		33,713,158		—		6,865,582		26,847,575
Short-term funding:
Federal funds purchased and securities sold under agreements to repurchase	265,671		265,661		—		265,661		—
BTFP funding	500,000		497,959		—		497,959		—
Total short-term funding	765,671		763,620		—		763,620		—
FHLB advances	1,333,411		1,320,280		—		1,320,280		—
Other long-term funding	536,055		517,009		—		517,009		—
Standby letters of credit(b)	2,347		2,347		—		2,347		—
Interest rate-related instruments designated as hedging instruments(c)	10,685		10,685		—		10,685		—
Foreign currency exchange forwards designated as hedging instruments(c)	230		230		—		230		—
Interest rate-related and other instruments not designated as hedging instruments(c)	222,303		222,303		—		222,303		—
Foreign currency exchange forwards not designated as hedging instruments(c)	4,956		4,956		—		4,956		—
Forward commitments to sell residential mortgage loans	222		222		—		—		222
Total selected liabilities at fair value	$	36,589,039	$	36,554,811	$	—	$	9,707,013	$	26,847,797

(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.
(b) The commitment on standby letters of credit was $230 million at March 31, 2024. See Note 11 for additional information on the standby letters of credit and for information on    the fair value of lending-related commitments.
(c) Figures are presented gross before netting. See Note 9 and Note 10 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, 2023
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and due from banks	$	484,384	$	484,384	$	484,384	$	—	$	—
Interest-bearing deposits in other financial institutions	425,089		425,089		425,089		—		—
Federal funds sold and securities purchased under agreements to resell	14,350		14,350		14,350		—		—
AFS investment securities:
U.S. Treasury securities	35,902		35,902		35,902		—		—
Obligations of state and political subdivisions (municipal securities)	91,817		91,817		—		91,817		—
Residential mortgage-related securities:
FNMA / FHLMC	1,120,794		1,120,794		—		1,120,794		—
GNMA	2,042,675		2,042,675		—		2,042,675		—
Commercial mortgage-related securities:
FNMA / FHLMC	16,937		16,937		—		16,937		—
GNMA	154,793		154,793		—		154,793		—
Asset backed securities:
FFELP	133,975		133,975		—		133,975		—
SBA	1,051		1,051		—		1,051		—
Other debt securities	2,950		2,950		—		2,950		—
Total AFS investment securities	3,600,892		3,600,892		35,902		3,564,990		—
HTM investment securities:
U.S. Treasury securities	999		963		963		—		—
Obligations of state and political subdivisions (municipal securities), net	1,682,398		1,553,984		—		1,553,984		—
Residential mortgage-related securities:
FNMA / FHLMC	941,973		804,393		—		804,393		—
GNMA	48,979		46,170		—		46,170		—
Private-label	345,083		289,507		—		289,507		—
Commercial mortgage-related securities:
FNMA / FHLMC	780,995		632,914		—		632,914		—
GNMA	59,733		52,619		—		52,619		—
Total HTM investment securities, net	3,860,160		3,380,550		963		3,379,586		—
Equity securities:
Equity securities	31,651		31,651		6,883		—		24,769
Equity securities at NAV	10,000		10,000
Total equity securities	41,651		41,651
FHLB and Federal Reserve Bank stocks	229,171		229,171		—		229,171		—
Residential loans held for sale	33,011		33,011		—		33,011		—
Commercial loans held for sale	90,303		90,303		—		90,303		—
Loans, net	28,865,124		27,371,086		—		—		27,371,086
Bank and corporate owned life insurance	682,649		682,649		—		682,649		—
Mortgage servicing rights, net	84,390		84,390		—		—		84,390
Interest rate-related instruments designated as hedging instruments(a)	8,075		8,075		—		8,075		—
Foreign currency exchange forwards designated as hedging instruments(a)	632		632		—		632		—
Interest rate-related and other instruments not designated as hedging instruments(a)	111,623		111,623		—		111,623		—
Foreign currency exchange forwards not designated as hedging instruments(a)	2,954		2,954		—		2,954		—
Interest rate lock commitments to originate residential mortgage loans held for sale	439		439		—		—		439
Total selected assets at fair value	$	38,534,897	$	36,561,249	$	967,570	$	8,102,995	$	27,480,684

(a) Figures are presented gross before netting. See Note 9 and Note 10 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, 2023
($ in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Liabilities
Deposits:
Noninterest-bearing demand	$	6,119,956	$	6,119,956	$	—	$	—	$	6,119,956
Savings	4,835,701		4,835,701		—		—		4,835,701
Interest-bearing demand	8,843,967		8,843,967		—		—		8,843,967
Money market	6,330,453		6,330,453		—		—		6,330,453
Brokered CDs(a)	4,447,479		4,447,479		—		4,447,479		—
Other time deposits(a)	2,868,494		2,868,494		—		2,868,494		—
Total deposits	33,446,049		33,446,049		—		7,315,973		26,130,076
Federal funds purchased and securities sold under agreements to repurchase	326,780		326,757		—		326,757		—
FHLB advances	1,940,194		1,944,600		—		1,944,600		—
Other long-term funding	541,269		534,983		—		534,983		—
Standby letters of credit(b)	2,157		2,157		—		2,157		—
Interest rate-related instruments designated as hedging instruments(c)	930		930		—		930		—
Foreign currency exchange forwards designated as hedging instruments(c)	2,946		2,946		—		2,946		—
Interest rate-related and other instruments not designated as hedging instruments(c)	195,662		195,662		—		195,662		—
Foreign currency exchange forwards not designated as hedging instruments(c)	2,746		2,746		—		2,746		—
Forward commitments to sell residential mortgage loans	673		673		—		—		673
Total selected liabilities at fair value	$	36,459,407	$	36,457,504	$	—	$	10,326,755	$	26,130,749

(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.

(b) The commitment on standby letters of credit was $212 million at December 31, 2023. See Note 11 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

(c) Figures are presented gross before netting. See Note 9 and Note 10 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.

Assets and liabilities measured at fair value using significant unobservable inputs (level 3)

The table below presents a rollforward of the consolidated balance sheets amounts for the three months ended March 31, 2024 and the year ended December 31, 2023, for the Corporation's mortgage derivatives measured 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		Total
Balance December 31, 2022	$	86	$	46	$	40
New production	6,557		(1,816)		8,373
Closed loans / settlements	(4,171)		2,494		(6,665)
Other	(2,033)		(51)		(1,982)
Change in mortgage derivative	352		627		(274)
Balance December 31, 2023	$	439	$	673	$	(234)
New production	$	1,820	$	(590)	$	2,409
Closed loans / settlements	(1,546)		188		(1,734)
Other	(46)		(49)		3
Change in mortgage derivative	227		(451)		678
Balance March 31, 2024	$	666	$	222	$	444

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, for the three months ended March 31, 2024 and the year ended December 31, 2023, 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, 2022	$	19,225
Gains recognized in investment securities gains, net	5,861
Purchases	11
Sales	(329)
Fair value as of December 31, 2023	$	24,769
Gains recognized in investment securities gains, net	$	4,054
Purchases	8
Sales	(28,725)
Fair value as of March 31, 2024	$	105

Assets and liabilities measured on nonrecurring basis at fair value

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:

($ in thousands)	Fair Value Hierarchy	Fair Value		Consolidated Statements of Income Category of Adjustment Recognized in Income	Adjustment Recognized on the Consolidated Statements of Income(a)
March 31, 2024
Assets
Individually evaluated loans	Level 3	$	67,625	Provision for credit losses	$	22,305
OREO(b)	Level 2	102		Other noninterest expense / provision for credit losses(c)	21
December 31, 2023
Assets
Individually evaluated loans	Level 3	$	47,221	Provision for credit losses	$	45,709
OREO(b)	Level 2	3,139		Other noninterest expense / provision for credit losses(c)	2,532
Equity securities without readily determinable fair values	Level 3	24,671		Investment securities gains (losses), net	5,785

(a) Includes the YTD impact on the consolidated statements of income.

(b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value and is therefore not included in the table.

(c) When a property's value is written down at the time it is transferred to OREO, the charge off is booked to the provision for credit losses. When a property is already in OREO and subsequently written down, the charge off is booked to other noninterest expense.

Schedule of assumptions for fair value as of balance sheet date of assets or liabilities that relate to transferor's continuing involvement

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

March 31, 2024	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%	6%
Individually evaluated loans	Appraisals / Discounted cash flow	Collateral / Discount factor	11%	-	56%	52%
Interest rate lock commitments to originate residential mortgage loans held for sale	Discounted cash flow	Closing Ratio	25%	-	100%	86%

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Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Net period benefit cost for the pension and postretirement plans

The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three months ended March 31, 2024 and 2023 were as follows:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
RAP
Service cost	$	874	$	796
Interest cost	2,719		2,686
Expected return on plan assets	(8,650)		(8,202)
Amortization of prior service cost	(53)		(63)
Amortization of actuarial loss	—		37
Total net periodic pension cost	$	(5,111)	$	(4,746)
Postretirement Plan
Interest cost	$	18	$	20
Amortization of prior service cost	(19)		(19)
Amortization of actuarial (gain)	(7)		(7)
Total net periodic benefit cost	$	(8)	$	(7)

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Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Selected segment information

Information about the Corporation’s segments is presented below:

	Corporate and Commercial Specialty
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	242,931	$	219,123
Net intersegment interest (expense)	(93,736)		(80,980)
Segment net interest income	149,195		138,143
Noninterest income	34,422		32,717
Total revenue	183,617		170,860
Provision for credit losses	15,428		13,782
Noninterest expense	66,350		62,119
Income before income taxes	101,839		94,960
Income tax expense	21,081		17,726
Net income	$	80,758	$	77,234
Allocated goodwill	$	525,836	$	525,836

	Community, Consumer, and Business
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	58,192	$	80,284
Net intersegment interest income	130,159		88,079
Segment net interest income	188,351		168,363
Noninterest income	24,494		25,947
Total revenue	212,845		194,310
Provision for credit losses	6,825		6,758
Noninterest expense	110,490		111,735
Income before income taxes	95,530		75,817
Income tax expense	20,062		15,922
Net income	$	75,468	$	59,895
Allocated goodwill	$	579,156	$	579,156

	Risk Management and Shared Services
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest (loss)	$	(43,266)	$	(25,397)
Net intersegment (expense)	(36,422)		(7,099)
Segment net interest (loss)	(79,688)		(32,496)
Noninterest income	6,068		3,409
Total revenue	(73,620)		(29,087)
Provision for credit losses	1,747		(2,568)
Noninterest expense	20,817		13,558
(Loss) before income taxes	(96,184)		(40,077)
Income tax (benefit)	(21,127)		(6,307)
Net (loss)	$	(75,058)	$	(33,770)
Allocated goodwill	$	—	$	—

	Consolidated Total
	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Net interest income	$	257,858	$	274,010
Net intersegment interest income	—		—
Segment net interest income	257,858		274,010
Noninterest income	64,985		62,073
Total revenue	322,842		336,083
Provision for credit losses	24,001		17,971
Noninterest expense	197,657		187,412
Income before income taxes	101,185		130,700
Income tax expense	20,016		27,340
Net income	$	81,169	$	103,360
Allocated goodwill	$	1,104,992	$	1,104,992

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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2024

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

Summary of activity in accumulated other comprehensive income (loss)

The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2024 and 2023, including changes during the preceding three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):

($ in thousands)	AFS Investment Securities		Cash Flow Hedge Derivatives		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2023	$	(148,641)	$	3,080	$	(25,535)	$	(171,096)
Other comprehensive (loss) before reclassifications	(29,889)		—		—		(29,889)
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities losses, net	197		—		—		197
HTM investment securities, net, at amortized cost(a)	2,060		—		—		2,060
Other assets / accrued expenses and other liabilities	—		(19,461)		—		(19,461)
Interest income	—		4,823		—		4,823
Personnel expense	—		—		(72)		(72)
Other expense	—		—		(7)		(7)
Income tax benefit (expense)	6,885		(1,688)		(1,633)		3,564
Net other comprehensive (loss) during period	(20,746)		(16,326)		(1,712)		(38,785)
Balance March 31, 2024	$	(169,388)	$	(13,246)	$	(27,247)	$	(209,881)
Balance December 31, 2022	$	(233,192)	$	3,360	$	(42,968)	$	(272,799)
Other comprehensive income before reclassifications	36,478		—		—		36,478
Amounts reclassified from accumulated other comprehensive income (loss):
HTM investment securities, net, at amortized cost(a)	2,267		—		—		2,267
Other assets / accrued expenses and other liabilities	—		13,763		—		13,763
Interest income	—		1,262		—		1,262
Personnel expense	—		—		(81)		(81)
Other expense	—		—		30		30
Income tax (expense) benefit	(9,892)		(4,694)		79		(14,507)
Net other comprehensive income during period	28,853		10,331		27		39,211
Balance March 31, 2023	$	(204,339)	$	13,691	$	(42,940)	$	(233,588)

(a) Amortization of net unrealized losses on AFS securities transferred to HTM securities.

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Leases (Tables)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Lease, Cost and Cash Flows

Operating and finance lease costs and cash flows resulting from these leases are presented below:

	Three Months Ended Mar 31,
($ in thousands)	2024		2023
Operating lease costs	$	1,545	$	1,464
Finance lease costs	23		23
Operating lease cash flows	1,844		1,828
Finance lease cash flows	23		22

Components of lease expense

The right-of-use asset and lease liability by lease classifications on the consolidated balance sheets were as follows:

($ in thousands)	Consolidated Balance Sheets Category	Mar 31, 2024		Dec 31, 2023
Operating lease right-of-use asset	Premises and equipment	$	23,310	$	24,712
Finance lease right-of-use asset	Other assets	347		368
Operating lease liability	Accrued expenses and other liabilities	25,813		27,311
Finance lease liability	Other long-term funding	361		383

Operating lease information

The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows:

	Mar 31, 2024					Dec 31, 2023
($ in thousands)	Lease payments		Weighted-average lease term (in years)	Weighted-average discount rate		Lease payments		Weighted-average lease term (in years)	Weighted-average discount rate
Operating leases
Retail and corporate offices	$	24,223	5.61	3.14	%	$	25,729	5.76	3.12	%
Land	3,846		6.87	3.49	%	4,050		6.98	3.48	%
Equipment	408		2.25	4.62	%	408		2.50	4.62	%
Total operating leases	$	28,476	5.73	3.21	%	$	30,187	5.88	3.19	%
Finance leases
Retail and corporate offices	$	370	4.00	1.32	%	$	394	4.25	1.32	%
Total finance leases	$	370	4.00	1.32	%	$	394	4.25	1.32	%

Amortization of operating lease liabilities

Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows:

($ in thousands)	Operating Leases		Finance Leases		Total Leases
Nine months ended December 31, 2024	$	4,828	$	69	$	4,898
2025	5,629		93		5,721
2026	5,023		93		5,116
2027	4,312		93		4,404
2028	3,428		23		3,451
Beyond 2028	5,257		—		5,257
Total lease payments	$	28,476	$	370	$	28,847
Less: interest	2,663		9		2,673
Present value of lease payments	$	25,813	$	361	$	26,174

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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income	$ 81,169	$ 103,360
Preferred stock dividends	(2,875)	(2,875)
Net income available to common equity	78,294	100,485
Common shareholder dividends	(33,407)	(31,808)
Unvested share-based payment awards	(120)	(205)
Undistributed earnings	44,767	68,472
Undistributed earnings allocated to common shareholders	44,524	68,086
Undistributed earnings allocated to unvested share-based payment awards	242	386
Basic
Distributed earnings to common shareholders	33,407	31,808
Undistributed earnings allocated to common shareholders	44,524	68,086
Total common shareholders earnings, basic	77,932	99,894
Diluted
Distributed earnings to common shareholders	33,407	31,808
Undistributed earnings allocated to common shareholders	44,524	68,086
Total common shareholders earnings, diluted	$ 77,932	$ 99,894
Weighted average common shares outstanding	149,855	149,763
Effect of dilutive common stock awards	1,436	1,365
Diluted weighted average common shares outstanding	151,292	151,128
Basic earnings per common share	$ 0.52	$ 0.67
Diluted earnings per common share	$ 0.52	$ 0.66

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Earnings Per Common Share (Details Textuals) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
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	2,000,000	2,000,000

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Stock-Based Compensation, Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Shares Outstanding, Beginning balance (in shares)	3,792
Exercised	179
Stock Options Shares Outstanding, Ending balance (in shares)	3,613	3,792
Options exercisable (in shares)	3,613
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock Option Outstanding, Weighted Average Exercise Price, Beginning balance (in usd per share)	$ 21.25
Exercised	17.27
Stock Option Outstanding, Weighted Average Exercise Price, Ending balance (in usd per share)	21.45	$ 21.25
Options Exercisable, Weighted Average Exercise Price (in usd per share)	$ 21.45
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	4 years 29 days	4 years 3 months 3 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	4 years 29 days	4 years 3 months 3 days
Options exercisable, Weighted Average Remaining Contractual Term	4 years 29 days
Stock Options Outstanding, Aggregate Intrinsic Value, Beginning balance	$ 5,834
Stock Options Outstanding, Aggregate Intrinsic Value, Ending balance	5,299	$ 5,834
Options exercisable, Aggregate Intrinsic Value	$ 5,299

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Stock-Based Compensation, Restricted Stock Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding Shares, Beginning balance (in shares) | shares	2,349
Granted | shares	802
Vested | shares	631
Forfeited | shares	4
Outstanding Shares, Ending balance (in shares) | shares	2,516
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, Weighted Average Grant Date Fair Value, Beginning balance (in usd per share) | $ / shares	$ 21.20
Granted, Weighted Average Grant Date Fair Value | $ / shares	21.00
Vested, Weighted Average Grant Date Fair Value | $ / shares	24.39
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	22.05
Outstanding Weighted Average Grant Date Fair Value, Ending balance (in usd per share) | $ / shares	$ 21.33

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Stock-Based Compensation (Details Textuals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award
Intrinsic value of stock options exercised	$ 722	$ 219
Total fair value of vested stock options	$ 489	$ 955
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	$ 3,000
Unvested share-based payment awards	30,000
Share-based Payment Arrangement, Expense	$ 8,000	$ 6,000
Remaining requisite service periods, extend through	first quarter of 2028

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Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 3,902,762	$ 3,749,814
Debt Securities, Available-for-sale, Unrealized Gain	6,359	24,579
Debt Securities, Available-for-sale, Unrealized Loss	(184,973)	(173,501)
AFS investment securities, at fair value	3,724,148	3,600,892
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,833,043	3,860,235
Held-to-maturity, Gross Unrealized Gains	50,145	55,619
Held-to-maturity, Gross Unrealized Loss	(581,903)	(535,230)
Held-to-maturity, Fair Value	3,301,284	3,380,624
US Treasury Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	39,985	39,984
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(4,427)	(4,083)
AFS investment securities, at fair value	35,558	35,902
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Loss	(30)	(36)
Held-to-maturity, Fair Value	969	963
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	83,823	94,008
Debt Securities, Available-for-sale, Unrealized Gain	1	23
Debt Securities, Available-for-sale, Unrealized Loss	(2,995)	(2,214)
AFS investment securities, at fair value	80,830	91,817
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,676,275	1,682,473
Held-to-maturity, Gross Unrealized Gains	2,292	5,638
Held-to-maturity, Gross Unrealized Loss	(154,833)	(134,053)
Held-to-maturity, Fair Value	1,523,734	1,554,059
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
AFS investment securities, at fair value	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	341,153	345,083
Held-to-maturity, Gross Unrealized Gains	9,399	9,796
Held-to-maturity, Gross Unrealized Loss	(69,484)	(65,372)
Held-to-maturity, Fair Value	281,069	289,507
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	130,196	135,832
Debt Securities, Available-for-sale, Unrealized Gain	22	5
Debt Securities, Available-for-sale, Unrealized Loss	(1,065)	(1,862)
AFS investment securities, at fair value	129,154	133,975
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Held-to-maturity, Fair Value	0
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	916	1,077
Debt Securities, Available-for-sale, Unrealized Gain	1	2
Debt Securities, Available-for-sale, Unrealized Loss	(28)	(28)
AFS investment securities, at fair value	890	1,051
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Held-to-maturity, Fair Value	0
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,000	3,000
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(35)	(50)
AFS investment securities, at fair value	2,965	2,950
US Government Sponsored-Enterprise Insured Loans | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,247,657	1,274,052
Debt Securities, Available-for-sale, Unrealized Gain	221	294
Debt Securities, Available-for-sale, Unrealized Loss	(156,880)	(153,552)
AFS investment securities, at fair value	1,090,998	1,120,794
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	930,148	941,973
Held-to-maturity, Gross Unrealized Gains	26,023	27,007
Held-to-maturity, Gross Unrealized Loss	(184,227)	(164,587)
Held-to-maturity, Fair Value	771,944	804,393
US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	18,603	18,691
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(1,595)	(1,755)
AFS investment securities, at fair value	17,008	16,937
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	779,310	780,995
Held-to-maturity, Gross Unrealized Gains	12,068	12,699
Held-to-maturity, Gross Unrealized Loss	(162,450)	(160,781)
Held-to-maturity, Fair Value	628,928	632,914
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2,219,058	2,021,242
Debt Securities, Available-for-sale, Unrealized Gain	6,114	24,254
Debt Securities, Available-for-sale, Unrealized Loss	(10,658)	(2,822)
AFS investment securities, at fair value	2,214,513	2,042,675
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	48,043	48,979
Held-to-maturity, Gross Unrealized Gains	24	92
Held-to-maturity, Gross Unrealized Loss	(3,609)	(2,901)
Held-to-maturity, Fair Value	44,457	46,170
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	159,523	161,928
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(7,291)	(7,135)
AFS investment securities, at fair value	152,232	154,793
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	57,114	59,733
Held-to-maturity, Gross Unrealized Gains	338	386
Held-to-maturity, Gross Unrealized Loss	(7,270)	(7,500)
Held-to-maturity, Fair Value	$ 50,183	$ 52,619

XML

Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Available for Sale, Due in one year or less	$ 1,915
Available for Sale, Due after one year through five years	47,142
Available for Sale, Due after five years through ten years	50,863
Available for Sale, Due after ten years	26,888
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	126,808
Available for Sale, Total debt securities	3,902,762	$ 3,749,814
Fair Value
Available for Sale, Due in one year or less	1,902
Available for Sale, Due after one year through five years	42,470
Available for Sale, Due after five years through ten years	48,613
Available for Sale, Due after ten years	26,368
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	119,353
Available for Sale, Total debt securities	$ 3,724,148	3,600,892
Available for Sale, Ratio of Fair Value to Amortized Cost	95.40%
Amortized Cost
Held to Maturity, Due in one year or less	$ 11,061
Held to Maturity, Due after one year through five years	58,092
Held to Maturity, Due after five years through ten years	166,954
Held to Maturity, Due after ten years	1,441,167
Held to Maturity, Total Debt Securities	1,677,274
Held to Maturity, Amortized Cost	3,833,043	3,860,235
Fair Value
Held to Maturity, Due in one year or less	11,011
Held to Maturity, Due after one year through five years	57,522
Held to Maturity, Due after five years through ten years	162,309
Held to Maturity, Due after ten years	1,293,862
Held to Maturity, Securities, Debt Securities	1,524,703
Held to Maturity, Total debt securities at fair value	$ 3,301,284	3,380,624
Held to Maturity, Ratio of Fair Value to Amortized Cost	86.10%
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
Held to Maturity, Amortized Cost	341,153	345,083
Fair Value
Held to Maturity, Total debt securities at fair value	281,069	289,507
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Amortized Cost
Available for Sale, Total debt securities	130,196	135,832
Fair Value
Available for Sale, Total debt securities	129,154	133,975
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
US Government-sponsored Enterprises Debt Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	916	1,077
Fair Value
Available for Sale, Total debt securities	890	1,051
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
US Government Sponsored-Enterprise Insured Loans | Residential Related Securities
Amortized Cost
Available for Sale, Total debt securities	1,247,657	1,274,052
Fair Value
Available for Sale, Total debt securities	1,090,998	1,120,794
Amortized Cost
Held to Maturity, Amortized Cost	930,148	941,973
Fair Value
Held to Maturity, Total debt securities at fair value	771,944	804,393
US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related securities
Amortized Cost
Available for Sale, Total debt securities	18,603	18,691
Fair Value
Available for Sale, Total debt securities	17,008	16,937
Amortized Cost
Held to Maturity, Amortized Cost	779,310	780,995
Fair Value
Held to Maturity, Total debt securities at fair value	628,928	632,914
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
Amortized Cost
Available for Sale, Total debt securities	2,219,058	2,021,242
Fair Value
Available for Sale, Total debt securities	2,214,513	2,042,675
Amortized Cost
Held to Maturity, Amortized Cost	48,043	48,979
Fair Value
Held to Maturity, Total debt securities at fair value	44,457	46,170
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
Amortized Cost
Available for Sale, Total debt securities	159,523	161,928
Fair Value
Available for Sale, Total debt securities	152,232	154,793
Amortized Cost
Held to Maturity, Amortized Cost	57,114	59,733
Fair Value
Held to Maturity, Total debt securities at fair value	$ 50,183	$ 52,619

XML

Investment Securities, HTM Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 3,833,043	$ 3,860,235
US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
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	1,676,275	1,682,473
Residential Related Securities | 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	930,148	941,973
Residential Related Securities | 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	48,043	48,979
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	341,153	345,083
Commercial mortgage-related securities | 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	779,310	780,995
Commercial mortgage-related securities | 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	57,114	59,733
Not Rated [Domain]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,154	1,155
Not Rated [Domain] | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Domain] | 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	1,154	1,155
Not Rated [Domain] | Residential Related Securities | 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	0	0
Not Rated [Domain] | Residential Related Securities | 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	0	0
Not Rated [Domain] | 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	0	0
Not Rated [Domain] | Commercial mortgage-related securities | 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	0	0
Not Rated [Domain] | Commercial mortgage-related securities | 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	0	0
AAA
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	2,924,988	2,938,090
AAA | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
AAA | 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	768,220	760,329
AAA | Residential Related Securities | 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	930,148	941,973
AAA | Residential Related Securities | 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	48,043	48,979
AAA | 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	341,153	345,083
AAA | Commercial mortgage-related securities | 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	779,310	780,995
AAA | Commercial mortgage-related securities | 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	57,114	59,733
AA
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	901,215	915,303
AA | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AA | 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	901,215	915,303
AA | Residential Related Securities | 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	0	0
AA | Residential Related Securities | 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	0	0
AA | 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	0	0
AA | Commercial mortgage-related securities | 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	0	0
AA | Commercial mortgage-related securities | 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	0	0
A
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	5,685	5,687
A | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A | 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	5,685	5,687
A | Residential Related Securities | 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	0	0
A | Residential Related Securities | 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	0	0
A | 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	0	0
A | Commercial mortgage-related securities | 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	0	0
A | Commercial mortgage-related securities | 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	$ 0	$ 0

XML

Investment Securities Gain/Loss Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Gross realized (losses) on AFS securities	$ (197)	$ 0
Gain on sale and net write-up of equity securities	4,076	51
Investment securities gains (losses), net	3,879	51
Proceeds from sales of AFS investment securities	$ 9,472	$ 0

XML

Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) 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	114	82
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (8,388)	$ (4,773)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,222,990	$ 307,527
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	240	213
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (176,585)	$ (168,728)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,484,212	1,392,635
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(184,973)	(173,501)
Debt Securities, Available-for-sale, Unrealized Loss Position	2,707,201	1,700,162
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(2,938)	(2,184)
Fair value of unrealized losses on held to maturity securities, less than 12 months	344,741	220,865
Unrealized losses on held to maturity securities, 12 months or more	(578,965)	(533,046)
Fair value of unrealized losses on held to maturity securities, 12 months or more	2,671,899	2,566,468
Total unrealized losses on held to maturity securities	(581,903)	(535,230)
Total fair value of unrealized losses on held to maturity securities	$ 3,016,640	$ 2,787,333
US Treasury 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	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	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (4,427)	$ (4,083)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	35,558	35,902
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,427)	(4,083)
Debt Securities, Available-for-sale, Unrealized Loss Position	35,558	35,902
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(30)	(36)
Fair value of unrealized losses on held to maturity securities, 12 months or more	969	963
Total unrealized losses on held to maturity securities	(30)	(36)
Total fair value of unrealized losses on held to maturity securities	$ 969	$ 963
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	27	41
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (218)	$ (347)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 13,847	$ 23,762
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	108	92
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (2,777)	$ (1,867)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	64,217	53,022
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(2,995)	(2,214)
Debt Securities, Available-for-sale, Unrealized Loss Position	78,064	76,784
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(2,536)	(1,535)
Fair value of unrealized losses on held to maturity securities, less than 12 months	324,576	180,270
Unrealized losses on held to maturity securities, 12 months or more	(152,297)	(132,518)
Fair value of unrealized losses on held to maturity securities, 12 months or more	916,225	792,940
Total unrealized losses on held to maturity securities	(154,833)	(134,053)
Total fair value of unrealized losses on held to maturity securities	1,240,801	973,210
Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(69,484)	(65,372)
Fair value of unrealized losses on held to maturity securities, 12 months or more	281,069	289,507
Total unrealized losses on held to maturity securities	(69,484)	(65,372)
Total fair value of unrealized losses on held to maturity securities	$ 281,069	$ 289,507
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	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (116)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 40,177	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	12	14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (949)	$ (1,862)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	75,411	125,339
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,065)	(1,862)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 115,588	$ 125,339
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	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	5	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (28)	$ (28)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	677	761
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(28)	(28)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 677	$ 761
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	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (7)	$ (9)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 993	$ 991
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	$ (28)	$ (42)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,972	1,958
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(35)	(50)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,965	$ 2,950
US Government Sponsored-Enterprise Insured Loans | Residential Related 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	24	18
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (694)	$ (333)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 31,375	$ 22,870
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	71	71
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (156,185)	$ (153,219)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,045,343	1,080,337
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(156,880)	(153,552)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,076,718	1,103,207
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(40)	(511)
Fair value of unrealized losses on held to maturity securities, less than 12 months	3,489	30,323
Unrealized losses on held to maturity securities, 12 months or more	(184,186)	(164,076)
Fair value of unrealized losses on held to maturity securities, 12 months or more	768,182	771,042
Total unrealized losses on held to maturity securities	(184,227)	(164,587)
Total fair value of unrealized losses on held to maturity securities	$ 771,671	$ 801,365
US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related 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	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	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,595)	$ (1,755)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	17,008	16,937
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,595)	(1,755)
Debt Securities, Available-for-sale, Unrealized Loss Position	17,008	16,937
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(263)	(121)
Fair value of unrealized losses on held to maturity securities, less than 12 months	8,003	8,144
Unrealized losses on held to maturity securities, 12 months or more	(162,187)	(160,660)
Fair value of unrealized losses on held to maturity securities, 12 months or more	620,926	624,770
Total unrealized losses on held to maturity securities	(162,450)	(160,781)
Total fair value of unrealized losses on held to maturity securities	$ 628,928	$ 632,914
Government National Mortgage Association (GNMA) [Member] | Residential Related 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	59	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (7,016)	$ (924)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,122,930	$ 156,847
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	10	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3,643)	$ (1,898)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	105,462	26,643
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(10,658)	(2,822)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,228,391	183,490
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(99)	(17)
Fair value of unrealized losses on held to maturity securities, less than 12 months	8,674	2,128
Unrealized losses on held to maturity securities, 12 months or more	(3,511)	(2,884)
Fair value of unrealized losses on held to maturity securities, 12 months or more	34,346	34,626
Total unrealized losses on held to maturity securities	(3,609)	(2,901)
Total fair value of unrealized losses on held to maturity securities	$ 43,020	$ 36,754
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related 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	1	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (337)	$ (3,160)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 13,668	$ 103,055
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	30	22
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (6,954)	$ (3,975)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	138,564	51,738
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(7,291)	(7,135)
Debt Securities, Available-for-sale, Unrealized Loss Position	152,232	154,793
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(7,270)	(7,500)
Fair value of unrealized losses on held to maturity securities, 12 months or more	50,183	52,619
Total unrealized losses on held to maturity securities	(7,270)	(7,500)
Total fair value of unrealized losses on held to maturity securities	$ 50,183	$ 52,619
Held to maturity, number of securities, less than 12 months
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	299	205
Held to maturity, number of securities, less than 12 months | US Treasury Securities
HTM investment securities
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 States and Political Subdivisions Debt Securities [Member]
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	287	182
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
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 Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	5	20
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	1	1
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	6	2
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
HTM investment securities
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
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	921	785
Held to maturity, number of securities, 12 months or more | US Treasury Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	1	1
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	653	537
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
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 Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	113	94
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	44	44
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	79	78
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	13	13

XML

Investment Securities (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Investment Securities Information [Line Items]
Debt Instrument, Collateral Amount	$ 1,500,000,000	$ 1,600,000,000
Interest receivable	167,092,000	169,569,000
Held to maturity allowance for credit loss	(76,000)	(75,000)
Federal Home Loan Bank Stock	86,000,000	143,000,000
Federal Reserve Bank Stock	88,000,000	87,000,000
Equity securities with readily determinable fair values, Fair Value	7,000,000	7,000,000
Equity securities	13,000,000	35,000,000
Held-to-maturity Securities [Member]
Investment Securities Information [Line Items]
Interest receivable	16,000,000	18,000,000
Available-for-sale Securities [Member]
Investment Securities Information [Line Items]
Interest receivable	16,000,000	15,000,000
Equity Securities [Member]
Investment Securities Information [Line Items]
Gain (Loss) on Sale of Investments	4,000,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Investment Securities Information [Line Items]
Interest receivable	2,000,000	4,000,000
Federal Reserve Bank Stock [Member]
Investment Securities Information [Line Items]
Interest receivable	921,000	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
Agency mortgage-related securities
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	$ 0	$ 0

XML

Loans Composition (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 29,494,263	$ 29,216,218
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	9,858,329	9,731,555
Commercial real estate — owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,095,894	1,061,700
Commercial and business lending
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,954,223	10,793,255
Commercial real estate — investor
Loans and Leases Receivable Disclosure [Line Items]
Loans	5,035,195	5,124,245
Real estate construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,287,041	2,271,398
Commercial real estate lending
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,322,237	7,395,644
Total commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,276,460	18,188,898
Residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,868,180	7,864,891
Automobile Loan
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,471,257	2,256,162
Home equity
Loans and Leases Receivable Disclosure [Line Items]
Loans	619,764	628,526
Other consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	258,603	277,740
Total consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 11,217,802	$ 11,027,319

XML

Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 8,303	$ 18,966
Financing Receivable, Revolving	2,642,788	2,712,389
Financing Receivable, Originated in Current Fiscal Year	1,128,545	5,363,890
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,274,974	8,307,956
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,211,066	6,039,862
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,770,365	2,556,071
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,409,052	1,578,023
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,057,474	2,658,026
Total	29,494,263	29,216,218
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	2,806	9,068
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	1,535
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	947	14,224
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	2,236	26,093
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17,899	6,237
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	33	130
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	98	1,482
Charge offs	24,018	58,768
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4,184	10,204
Financing Receivable, Revolving	2,600,839	2,604,690
Financing Receivable, Originated in Current Fiscal Year	1,038,615	5,206,038
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,128,316	8,093,062
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,014,215	5,886,359
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,607,272	2,511,435
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,370,376	1,537,747
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,916,525	2,556,674
Total	28,676,159	28,396,005
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	20	205
Financing Receivable, Revolving	15,787	23,595
Financing Receivable, Originated in Current Fiscal Year	0	8,893
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,999	74,020
Financing Receivable, Originated Two Years before Latest Fiscal Year	48,169	41,091
Financing Receivable, Originated Three Years before Latest Fiscal Year	37,270	6,213
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,399	29,882
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36,752	33,089
Total	155,375	216,784
Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	434	814
Financing Receivable, Revolving	26,026	83,872
Financing Receivable, Originated in Current Fiscal Year	85,342	131,753
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	115,707	112,289
Financing Receivable, Originated Two Years before Latest Fiscal Year	118,109	68,695
Financing Receivable, Originated Three Years before Latest Fiscal Year	97,816	27,253
Financing Receivable, Originated Four Years before Latest Fiscal Year	26,582	3,387
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14,800	27,183
Total	484,383	454,432
Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,666	7,744
Financing Receivable, Revolving	137	231
Financing Receivable, Originated in Current Fiscal Year	4,588	17,206
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,952	28,584
Financing Receivable, Originated Two Years before Latest Fiscal Year	30,572	43,718
Financing Receivable, Originated Three Years before Latest Fiscal Year	28,007	11,170
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,695	7,007
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	89,396	41,080
Total	178,346	148,997
Total commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,869	8,598
Financing Receivable, Revolving	1,938,423	1,991,827
Financing Receivable, Originated in Current Fiscal Year	718,430	3,781,028
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,734,133	5,687,614
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,629,140	3,835,298
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,597,858	1,127,677
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,007,588	917,114
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,650,888	848,341
Total	18,276,460	18,188,898
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,024	4,130
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	717
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	125	9,594
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	553	25,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17,724	5,958
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	3	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3	295
Charge offs	19,432	45,989
Total commercial | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	279	1,380
Financing Receivable, Revolving	1,899,301	1,887,058
Financing Receivable, Originated in Current Fiscal Year	629,429	3,626,800
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,591,627	5,489,219
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,449,918	3,691,830
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,445,296	1,093,633
Financing Receivable, Originated Four Years before Latest Fiscal Year	977,615	884,162
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,556,566	788,529
Total	17,549,751	17,461,232
Total commercial | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	14,883	22,552
Financing Receivable, Originated in Current Fiscal Year	0	8,265
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,305	72,084
Financing Receivable, Originated Two Years before Latest Fiscal Year	46,710	40,882
Financing Receivable, Originated Three Years before Latest Fiscal Year	37,146	6,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,392	29,772
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36,480	32,648
Total	151,916	212,368
Total commercial | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	434	804
Financing Receivable, Revolving	24,239	82,216
Financing Receivable, Originated in Current Fiscal Year	85,342	131,253
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	115,205	112,123
Financing Receivable, Originated Two Years before Latest Fiscal Year	118,017	68,695
Financing Receivable, Originated Three Years before Latest Fiscal Year	97,816	27,253
Financing Receivable, Originated Four Years before Latest Fiscal Year	26,582	3,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14,545	27,157
Total	481,745	451,876
Total commercial | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,157	6,414
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	3,659	14,710
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,997	14,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	14,495	33,891
Financing Receivable, Originated Three Years before Latest Fiscal Year	17,599	627
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	43,297	6
Total	93,047	63,422
Total commercial | Commercial and Industrial Sector
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,869	8,598
Financing Receivable, Revolving	1,769,772	1,796,951
Financing Receivable, Originated in Current Fiscal Year	365,538	1,764,466
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,786,369	2,977,719
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,927,740	1,914,057
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,806,637	419,934
Financing Receivable, Originated Four Years before Latest Fiscal Year	400,739	383,789
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	801,535	474,638
Total	9,858,329	9,731,555
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,024	4,130
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	717
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	125	9,594
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	553	25,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17,724	5,958
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	3	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	18
Charge offs	19,429	45,687
Total commercial | Commercial and Industrial Sector | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	279	1,380
Financing Receivable, Revolving	1,732,197	1,693,249
Financing Receivable, Originated in Current Fiscal Year	318,587	1,736,617
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,758,151	2,877,173
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,806,636	1,824,362
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,701,638	398,046
Financing Receivable, Originated Four Years before Latest Fiscal Year	380,164	383,695
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	774,950	449,006
Total	9,472,322	9,362,149
Total commercial | 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	14,287	21,779
Financing Receivable, Originated in Current Fiscal Year	0	4,017
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,305	46,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,216	8,525
Financing Receivable, Originated Three Years before Latest Fiscal Year	27,909	3,529
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,392	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	865	25,341
Total	83,973	109,801
Total commercial | Commercial and Industrial Sector | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	434	804
Financing Receivable, Revolving	23,288	81,924
Financing Receivable, Originated in Current Fiscal Year	44,013	10,515
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,283	39,748
Financing Receivable, Originated Two Years before Latest Fiscal Year	82,394	47,279
Financing Receivable, Originated Three Years before Latest Fiscal Year	59,491	17,732
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,184	94
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,138	291
Total	229,791	197,582
Total commercial | Commercial and Industrial Sector | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,157	6,414
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	2,938	13,317
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	12,629	14,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	14,495	33,891
Financing Receivable, Originated Three Years before Latest Fiscal Year	17,599	627
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	24,582	0
Total	72,243	62,022
Total commercial | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	12,500	15,957
Financing Receivable, Originated in Current Fiscal Year	59,646	220,168
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	215,436	190,794
Financing Receivable, Originated Two Years before Latest Fiscal Year	193,440	251,783
Financing Receivable, Originated Three Years before Latest Fiscal Year	247,228	147,708
Financing Receivable, Originated Four Years before Latest Fiscal Year	142,306	138,816
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	225,339	96,473
Total	1,095,894	1,061,700
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	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3	0
Charge offs	3	25
Total commercial | Commercial real estate — owner occupied | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	11,455	15,393
Financing Receivable, Originated in Current Fiscal Year	56,257	204,039
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	196,065	188,003
Financing Receivable, Originated Two Years before Latest Fiscal Year	191,357	239,218
Financing Receivable, Originated Three Years before Latest Fiscal Year	234,852	136,535
Financing Receivable, Originated Four Years before Latest Fiscal Year	133,883	135,730
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	218,224	92,339
Total	1,042,093	1,011,259
Total commercial | Commercial real estate — owner occupied | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	94	271
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	6,150
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	2,635
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	1,293
Total	94	10,349
Total commercial | Commercial real estate — owner occupied | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	950	292
Financing Receivable, Originated in Current Fiscal Year	2,667	14,735
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	18,003	2,791
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,083	6,416
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,376	8,537
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,423	3,086
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,114	2,841
Total	51,616	38,699
Total commercial | Commercial real estate — owner occupied | 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	722	1,394
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,368	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
Total	2,090	1,394
Total commercial | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,869	8,598
Financing Receivable, Revolving	1,782,272	1,812,909
Financing Receivable, Originated in Current Fiscal Year	425,184	1,984,635
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,001,805	3,168,514
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,121,180	2,165,840
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,053,865	567,642
Financing Receivable, Originated Four Years before Latest Fiscal Year	543,045	522,606
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,026,873	571,111
Total	10,954,223	10,793,255
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,024	4,130
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	717
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	125	9,594
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	553	25,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17,724	5,958
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	3	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3	18
Charge offs	19,432	45,713
Total commercial | Commercial and business lending | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	279	1,380
Financing Receivable, Revolving	1,743,652	1,708,642
Financing Receivable, Originated in Current Fiscal Year	374,844	1,940,657
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,954,216	3,065,177
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,997,992	2,063,580
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,936,490	534,581
Financing Receivable, Originated Four Years before Latest Fiscal Year	514,047	519,426
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	993,174	541,345
Total	10,514,415	10,373,408
Total commercial | Commercial and business lending | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	14,381	22,050
Financing Receivable, Originated in Current Fiscal Year	0	4,017
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,305	46,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,216	14,675
Financing Receivable, Originated Three Years before Latest Fiscal Year	27,909	6,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,392	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	865	26,634
Total	84,068	120,150
Total commercial | Commercial and business lending | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	434	804
Financing Receivable, Revolving	24,239	82,216
Financing Receivable, Originated in Current Fiscal Year	46,680	25,250
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	20,286	42,539
Financing Receivable, Originated Two Years before Latest Fiscal Year	84,477	53,695
Financing Receivable, Originated Three Years before Latest Fiscal Year	71,867	26,269
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,606	3,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,252	3,132
Total	281,408	236,281
Total commercial | Commercial and business lending | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,157	6,414
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	3,659	14,710
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,997	14,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	14,495	33,891
Financing Receivable, Originated Three Years before Latest Fiscal Year	17,599	627
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	24,582	0
Total	74,333	63,416
Total commercial | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	131,886	155,611
Financing Receivable, Originated in Current Fiscal Year	234,727	1,374,116
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,257,561	1,342,492
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,330,362	1,121,633
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,049,946	472,355
Financing Receivable, Originated Four Years before Latest Fiscal Year	419,509	388,768
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	611,204	269,269
Total	5,035,195	5,124,245
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff		0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		252
Charge offs		252
Total commercial | Commercial real estate — investor | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	131,383	155,109
Financing Receivable, Originated in Current Fiscal Year	196,066	1,263,866
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,162,643	1,247,434
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,274,328	1,080,425
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,014,759	471,371
Financing Receivable, Originated Four Years before Latest Fiscal Year	418,534	358,996
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	550,600	239,230
Total	4,748,313	4,816,433
Total commercial | Commercial real estate — investor | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	502	502
Financing Receivable, Originated in Current Fiscal Year	0	4,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	25,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,494	26,208
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,238	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	29,772
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	35,614	6,014
Total	67,848	92,218
Total commercial | Commercial real estate — investor | Substandard
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	38,662	106,002
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	94,918	69,584
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,540	15,000
Financing Receivable, Originated Three Years before Latest Fiscal Year	25,949	983
Financing Receivable, Originated Four Years before Latest Fiscal Year	975	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,293	24,025
Total	200,338	215,595
Total commercial | Commercial real estate — investor | Nonaccrual Loan [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	0
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	18,697
Total	18,697
Total commercial | Real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	24,266	23,307
Financing Receivable, Originated in Current Fiscal Year	58,519	422,277
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	474,768	1,176,608
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,177,598	547,825
Financing Receivable, Originated Three Years before Latest Fiscal Year	494,047	87,680
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,034	5,740
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,810	7,960
Total	2,287,041	2,271,398
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff		0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		25
Charge offs		25
Total commercial | Real estate construction | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	24,266	23,307
Financing Receivable, Originated in Current Fiscal Year	58,519	422,277
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	474,768	1,176,608
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,177,598	547,825
Financing Receivable, Originated Three Years before Latest Fiscal Year	494,047	87,680
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,034	5,740
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,792	7,954
Total	2,287,023	2,271,392
Total commercial | Real estate construction | 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	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	18	6
Total	18	6
Total commercial | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	156,151	178,918
Financing Receivable, Originated in Current Fiscal Year	293,246	1,796,393
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,732,329	2,519,100
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,507,960	1,669,458
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,543,993	560,035
Financing Receivable, Originated Four Years before Latest Fiscal Year	464,543	394,508
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	624,014	277,230
Total	7,322,237	7,395,644
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff		0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		277
Charge offs		277
Total commercial | Commercial Real Estate | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	155,649	178,416
Financing Receivable, Originated in Current Fiscal Year	254,585	1,686,143
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,637,410	2,424,042
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,451,926	1,628,250
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,508,806	559,052
Financing Receivable, Originated Four Years before Latest Fiscal Year	463,568	364,737
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	563,392	247,184
Total	7,035,336	7,087,824
Total commercial | Commercial Real Estate | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	502	502
Financing Receivable, Originated in Current Fiscal Year	0	4,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	25,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,494	26,208
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,238	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	29,772
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	35,614	6,014
Total	67,848	92,218
Total commercial | Commercial Real Estate | Substandard
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	38,662	106,002
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	94,918	69,584
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,540	15,000
Financing Receivable, Originated Three Years before Latest Fiscal Year	25,949	983
Financing Receivable, Originated Four Years before Latest Fiscal Year	975	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,293	24,025
Total	200,338	215,595
Total commercial | Commercial Real Estate | 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	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	18,715	6
Total	18,715	6
Total consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4,434	10,369
Financing Receivable, Revolving	704,365	720,563
Financing Receivable, Originated in Current Fiscal Year	410,115	1,582,862
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,540,841	2,620,341
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,581,926	2,204,564
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,172,506	1,428,395
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,401,464	660,909
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,406,586	1,809,685
Total	11,217,802	11,027,319
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,782	4,937
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	818
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	822	4,630
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	1,683	823
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	175	279
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	30	105
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	95	1,187
Charge offs	4,586	12,779
Total consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,905	8,824
Financing Receivable, Revolving	701,538	717,632
Financing Receivable, Originated in Current Fiscal Year	409,186	1,579,238
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,536,690	2,603,843
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,564,297	2,194,529
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,161,975	1,417,802
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,392,762	653,584
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,359,959	1,768,145
Total	11,126,407	10,934,773
Total consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	20	205
Financing Receivable, Revolving	904	1,043
Financing Receivable, Originated in Current Fiscal Year	0	628
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	694	1,936
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,459	208
Financing Receivable, Originated Three Years before Latest Fiscal Year	123	49
Financing Receivable, Originated Four Years before Latest Fiscal Year	7	110
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	272	441
Total	3,459	4,416
Total consumer | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	10
Financing Receivable, Revolving	1,788	1,656
Financing Receivable, Originated in Current Fiscal Year	0	500
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	502	166
Financing Receivable, Originated Two Years before Latest Fiscal Year	92	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	207
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	255	26
Total	2,637	2,556
Total consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	509	1,330
Financing Receivable, Revolving	137	231
Financing Receivable, Originated in Current Fiscal Year	928	2,496
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,955	14,396
Financing Receivable, Originated Two Years before Latest Fiscal Year	16,077	9,827
Financing Receivable, Originated Three Years before Latest Fiscal Year	10,407	10,544
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,695	7,007
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	46,100	41,073
Total	85,299	85,574
Total consumer | Residential mortgage
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	24,427	354,236
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	397,954	1,627,070
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,667,606	2,119,836
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,095,841	1,424,583
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,398,141	654,675
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,284,210	1,684,490
Total	7,868,180	7,864,891
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	2
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	40	32
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	42
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	148
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	2	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	47	723
Charge offs	89	952
Total consumer | Residential mortgage | 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	23,550	352,321
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	396,223	1,617,409
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,657,013	2,110,577
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,086,129	1,414,186
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,389,566	647,778
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,244,891	1,650,542
Total	7,797,372	7,792,813
Total consumer | Residential mortgage | 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	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	95
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	94	57
Total	94	152
Total consumer | Residential mortgage | Substandard
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	490
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	467	93
Financing Receivable, Originated Two Years before Latest Fiscal Year	92	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	174
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	199	26
Total	759	784
Total consumer | Residential mortgage | 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	877	1,425
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,264	9,567
Financing Receivable, Originated Two Years before Latest Fiscal Year	10,501	9,259
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,712	10,397
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,575	6,628
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	39,026	33,865
Total	69,954	71,142
Total consumer | Automobile Loan
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	384,147	1,220,471
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,136,306	959,094
Financing Receivable, Originated Two Years before Latest Fiscal Year	881,218	75,844
Financing Receivable, Originated Three Years before Latest Fiscal Year	69,094	163
Financing Receivable, Originated Four Years before Latest Fiscal Year	137	458
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	354	132
Total	2,471,257	2,256,162
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	795
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	767	4,524
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	1,675	626
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	158	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	0
Charge offs	2,600	5,950
Total consumer | Automobile Loan | 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	384,126	1,218,820
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,133,964	952,839
Financing Receivable, Originated Two Years before Latest Fiscal Year	874,922	75,209
Financing Receivable, Originated Three Years before Latest Fiscal Year	68,423	163
Financing Receivable, Originated Four Years before Latest Fiscal Year	137	456
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	352	132
Total	2,461,925	2,247,618
Total consumer | Automobile Loan | 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	0	619
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	634	1,850
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,398	205
Financing Receivable, Originated Three Years before Latest Fiscal Year	117	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
Total	2,148	2,674
Total consumer | Automobile Loan | Substandard
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	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	26	73
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
Total	26	73
Total consumer | Automobile Loan | 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	21	1,032
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,682	4,332
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,898	430
Financing Receivable, Originated Three Years before Latest Fiscal Year	554	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	3
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Total	7,158	5,797
Total consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4,352	10,195
Financing Receivable, Revolving	515,127	521,434
Financing Receivable, Originated in Current Fiscal Year	51	1,717
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,563	30,445
Financing Receivable, Originated Two Years before Latest Fiscal Year	30,248	6,217
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,090	2,500
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,398	5,308
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	64,286	60,907
Total	619,764	628,526
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	93	53
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	21
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	3
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	31
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	22
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	15	294
Charge offs	108	424
Total consumer | Home equity | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,830	8,703
Financing Receivable, Revolving	514,998	521,000
Financing Receivable, Originated in Current Fiscal Year	21	1,678
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,508	29,863
Financing Receivable, Originated Two Years before Latest Fiscal Year	29,539	6,084
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,949	2,327
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,278	4,891
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	56,995	53,350
Total	611,286	619,192
Total consumer | Home equity | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	17	179
Financing Receivable, Revolving	53	200
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	46	87
Financing Receivable, Originated Two Years before Latest Fiscal Year	38	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	29
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	15
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	175	378
Total	312	708
Total consumer | Home equity | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	10
Financing Receivable, Revolving	0	75
Financing Receivable, Originated in Current Fiscal Year	0	10
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	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	33
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	56	0
Total	65	118
Total consumer | Home equity | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	505	1,302
Financing Receivable, Revolving	76	160
Financing Receivable, Originated in Current Fiscal Year	31	29
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	495
Financing Receivable, Originated Two Years before Latest Fiscal Year	671	132
Financing Receivable, Originated Three Years before Latest Fiscal Year	141	144
Financing Receivable, Originated Four Years before Latest Fiscal Year	120	368
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,061	7,180
Total	8,100	8,508
Total consumer | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	82	174
Financing Receivable, Revolving	189,238	199,129
Financing Receivable, Originated in Current Fiscal Year	1,489	6,438
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,018	3,733
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,854	2,668
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,480	1,149
Financing Receivable, Originated Four Years before Latest Fiscal Year	788	468
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	57,735	64,156
Total	258,603	277,740
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,688	4,884
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	15	72
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	8	124
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17	131
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	28	72
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	34	170
Charge offs	1,790	5,453
Total consumer | Other consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	75	121
Financing Receivable, Revolving	186,540	196,632
Financing Receivable, Originated in Current Fiscal Year	1,489	6,419
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,995	3,732
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,823	2,658
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,474	1,127
Financing Receivable, Originated Four Years before Latest Fiscal Year	781	460
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	57,722	64,121
Total	255,824	275,149
Total consumer | Other consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3	26
Financing Receivable, Revolving	850	843
Financing Receivable, Originated in Current Fiscal Year	0	9
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	24	3
Financing Receivable, Originated Three Years before Latest Fiscal Year	6	20
Financing Receivable, Originated Four Years before Latest Fiscal Year	7	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3	6
Total	904	881
Total consumer | Other consumer | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	1,788	1,582
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
Total	1,788	1,582
Total consumer | Other consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4	27
Financing Receivable, Revolving	61	71
Financing Receivable, Originated in Current Fiscal Year	0	10
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	1
Financing Receivable, Originated Two Years before Latest Fiscal Year	7	6
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	2
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	8
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	11	29
Total	$ 87	$ 128

XML

Loans Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Summarized details of Loans
Current	$ 29,265,051	$ 28,983,708
Financing Receivable, Nonaccrual	178,346	148,997
Loans and Leases Receivable, Net of Deferred Income, Total	29,494,263	29,216,218
Nonaccrual Loans, Current Portion	$ 98,000	$ 80,000
Percent of current nonaccrual loans	55.00%	53.00%
Financing Receivable, Nonaccrual, Interest Income	$ 0	$ 0
Financing Receivable, Nonaccrual, No Allowance	20,000	23,000
30-59 Days Past Due
Summarized details of Loans
Total Past Due	25,617	38,113
60-89 Days Past Due
Summarized details of Loans
Total Past Due	22,831	23,712
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	2,417	21,689
Commercial and Industrial Sector
Summarized details of Loans
Current	9,785,140	9,663,587
Financing Receivable, Nonaccrual	72,243	62,022
Loans and Leases Receivable, Net of Deferred Income, Total	9,858,329	9,731,555
Commercial and Industrial Sector | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	371	5,374
Commercial and Industrial Sector | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	150	191
Commercial and Industrial Sector | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	426	380
Commercial real estate — owner occupied
Summarized details of Loans
Current	1,093,804	1,059,948
Financing Receivable, Nonaccrual	2,090	1,394
Loans and Leases Receivable, Net of Deferred Income, Total	1,095,894	1,061,700
Commercial real estate — owner occupied | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	0	0
Commercial real estate — owner occupied | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	358
Commercial real estate — owner occupied | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0
Commercial and business lending
Summarized details of Loans
Current	10,878,944	10,723,536
Financing Receivable, Nonaccrual	74,333	63,416
Loans and Leases Receivable, Net of Deferred Income, Total	10,954,223	10,793,255
Commercial and business lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	371	5,374
Commercial and business lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	150	549
Commercial and business lending | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	426	380
Commercial real estate — investor
Summarized details of Loans
Current	4,997,335	5,086,117
Financing Receivable, Nonaccrual	18,697	0
Loans and Leases Receivable, Net of Deferred Income, Total	5,035,195	5,124,245
Commercial real estate — investor | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	0	0
Commercial real estate — investor | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	19,164	18,697
Commercial real estate — investor | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	19,432
Real estate construction
Summarized details of Loans
Current	2,285,763	2,271,392
Financing Receivable, Nonaccrual	18	6
Loans and Leases Receivable, Net of Deferred Income, Total	2,287,041	2,271,398
Real estate construction | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,260	0
Real estate construction | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0
Real estate construction | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0
Commercial real estate lending
Summarized details of Loans
Current	7,283,098	7,357,509
Financing Receivable, Nonaccrual	18,715	6
Loans and Leases Receivable, Net of Deferred Income, Total	7,322,237	7,395,644
Commercial real estate lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,260	0
Commercial real estate lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	19,164	18,697
Commercial real estate lending | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	19,432
Total commercial
Summarized details of Loans
Current	18,162,042	18,081,044
Financing Receivable, Nonaccrual	93,047	63,422
Loans and Leases Receivable, Net of Deferred Income, Total	18,276,460	18,188,898
Total commercial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,631	5,374
Total commercial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	19,314	19,246
Total commercial | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	426	19,812
Residential mortgage
Summarized details of Loans
Current	7,788,322	7,780,304
Financing Receivable, Nonaccrual	69,954	71,142
Loans and Leases Receivable, Net of Deferred Income, Total	7,868,180	7,864,891
Residential mortgage | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	9,808	13,294
Residential mortgage | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	94	152
Residential mortgage | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0
Automobile Loan
Summarized details of Loans
Current	2,451,552	2,232,906
Financing Receivable, Nonaccrual	7,158	5,797
Loans and Leases Receivable, Net of Deferred Income, Total	2,471,257	2,256,162
Automobile Loan | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	10,373	14,712
Automobile Loan | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	2,148	2,674
Automobile Loan | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	26	73
Home equity
Summarized details of Loans
Current	608,821	615,810
Financing Receivable, Nonaccrual	8,100	8,508
Loans and Leases Receivable, Net of Deferred Income, Total	619,764	628,526
Home equity | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	2,506	3,500
Home equity | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	312	708
Home equity | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	24	0
Other consumer
Summarized details of Loans
Current	254,313	273,644
Financing Receivable, Nonaccrual	87	128
Loans and Leases Receivable, Net of Deferred Income, Total	258,603	277,740
Other consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,298	1,233
Other consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	963	932
Other consumer | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	1,942	1,803
Total consumer
Summarized details of Loans
Current	11,103,009	10,902,664
Financing Receivable, Nonaccrual	85,299	85,574
Loans and Leases Receivable, Net of Deferred Income, Total	11,217,802	11,027,319
Total consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	23,985	32,739
Total consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	3,517	4,467
Total consumer | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	$ 1,992	$ 1,876

XML

Loans, Modifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term, Range, From	254 months	334 months
Financing Receivable, Modified, Weighted Average Term, Range, To	407 months	360 months
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 739	$ 637
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(9.00%)	(17.00%)
Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 209
Financing Receivable, Modified, Weighted Average Term Increase from Modification	153 months	26 months
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 674	$ 258
Commercial and Industrial Sector | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 159	$ 47
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(16.00%)	(16.00%)
Automobile Loan | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 46	$ 61
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(9.00%)	(2.00%)
Residential mortgage | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	3.00%	0.00%
Residential mortgage | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 209
Financing Receivable, Modified, Weighted Average Term Increase from Modification	158 months	26 months
Residential mortgage | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 643	$ 165
Home equity | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 31
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(3.00%)	1.00%
Home equity | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	64 months	0 months
Home equity | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 31	$ 93
Other consumer | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 534	$ 498
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(21.00%)	(20.00%)

XML

Loans, Modifications in Last 12 Months, Performance - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 2,407	$ 763
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	50	0
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
Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,141	341
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	377	47
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
Commercial and Industrial Sector | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0	0
Residential mortgage | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	345	126
Residential mortgage | 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
Residential mortgage | 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 | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	991	248
Automobile Loan | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	63	61
Automobile Loan | 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	3	0
Automobile Loan | 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
Automobile Loan | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	11	0
Home equity | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	135	31
Home equity | 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	47	0
Home equity | 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
Home equity | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	139	93
Other consumer | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,487	498
Other consumer | 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 | 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
Other consumer | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0

XML

Loans, Modified, Subsequent Default (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 11	$ 0
Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0	0
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0	60
Home equity | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default		0
Home equity | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default		0
Home equity | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default		$ 60
Automobile Loan | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	11
Automobile Loan | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Automobile Loan | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 0

XML

Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ 24,018		$ 58,768
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	34,776	$ 38,776	38,776
Provision for credit losses	(3,000)		(4,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	31,776		34,776
Allowance for credit losses on loans
Charge offs	24,018		58,768
Provision for credit losses	24,001	17,971
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	351,094	312,720	312,720
Charge offs	(24,018)		(58,768)
Recoveries	1,930		10,142
Net Charge offs	(22,088)		(48,626)
Provision for credit losses	27,000		87,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	356,006		351,094
Allowance for credit losses on loans
Charge offs	(24,018)		(58,768)
Recoveries	1,930		10,142
Net Charge offs	(22,088)		(48,626)
Allowance for Loan Losses [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	128,263	119,076	119,076
Charge offs	(19,429)		(45,687)
Recoveries	791		3,015
Net Charge offs	(18,638)		(42,672)
Provision for credit losses	23,202		51,859
Financing Receivable, Allowance for Credit Loss, Ending Balance	132,826		128,263
Allowance for credit losses on loans
Charge offs	(19,429)		(45,687)
Recoveries	791		3,015
Net Charge offs	(18,638)		(42,672)
Allowance for Loan Losses [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	10,610	9,475	9,475
Charge offs	(3)		(25)
Recoveries	5		11
Net Charge offs	2		(15)
Provision for credit losses	1,768		1,150
Financing Receivable, Allowance for Credit Loss, Ending Balance	12,381		10,610
Allowance for credit losses on loans
Charge offs	(3)		(25)
Recoveries	5		11
Net Charge offs	2		(15)
Allowance for Loan Losses [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	138,873	128,551	128,551
Charge offs	(19,432)		(45,713)
Recoveries	796		3,026
Net Charge offs	(18,636)		(42,687)
Provision for credit losses	24,970		53,009
Financing Receivable, Allowance for Credit Loss, Ending Balance	145,207		138,873
Allowance for credit losses on loans
Charge offs	(19,432)		(45,713)
Recoveries	796		3,026
Net Charge offs	(18,636)		(42,687)
Allowance for Loan Losses [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	67,858	54,398	54,398
Charge offs	0		(252)
Recoveries	0		3,016
Net Charge offs	0		2,763
Provision for credit losses	4,137		10,697
Financing Receivable, Allowance for Credit Loss, Ending Balance	71,995		67,858
Allowance for credit losses on loans
Charge offs	0		(252)
Recoveries	0		3,016
Net Charge offs	0		2,763
Allowance for Loan Losses [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	53,554	45,589	45,589
Charge offs	0		(25)
Recoveries	30		80
Net Charge offs	30		55
Provision for credit losses	(4,281)		7,910
Financing Receivable, Allowance for Credit Loss, Ending Balance	49,303		53,554
Allowance for credit losses on loans
Charge offs	0		(25)
Recoveries	30		80
Net Charge offs	30		55
Allowance for Loan Losses [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	121,412	99,986	99,986
Charge offs	0		(277)
Recoveries	30		3,095
Net Charge offs	30		2,819
Provision for credit losses	(144)		18,607
Financing Receivable, Allowance for Credit Loss, Ending Balance	121,298		121,412
Allowance for credit losses on loans
Charge offs	0		(277)
Recoveries	30		3,095
Net Charge offs	30		2,819
Allowance for Loan Losses [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	260,285	228,538	228,538
Charge offs	(19,432)		(45,989)
Recoveries	826		6,121
Net Charge offs	(18,606)		(39,868)
Provision for credit losses	24,826		71,616
Financing Receivable, Allowance for Credit Loss, Ending Balance	266,506		260,285
Allowance for credit losses on loans
Charge offs	(19,432)		(45,989)
Recoveries	826		6,121
Net Charge offs	(18,606)		(39,868)
Allowance for Loan Losses [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	37,808	38,298	38,298
Charge offs	(89)		(952)
Recoveries	27		541
Net Charge offs	(62)		(411)
Provision for credit losses	(1,831)		(79)
Financing Receivable, Allowance for Credit Loss, Ending Balance	35,915		37,808
Allowance for credit losses on loans
Charge offs	(89)		(952)
Recoveries	27		541
Net Charge offs	(62)		(411)
Allowance for Loan Losses [Member] | Automobile Loan
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	24,961	19,619	19,619
Charge offs	(2,600)		(5,950)
Recoveries	506		1,241
Net Charge offs	(2,094)		(4,709)
Provision for credit losses	3,248		10,051
Financing Receivable, Allowance for Credit Loss, Ending Balance	26,114		24,961
Allowance for credit losses on loans
Charge offs	(2,600)		(5,950)
Recoveries	506		1,241
Net Charge offs	(2,094)		(4,709)
Allowance for Loan Losses [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	15,403	14,875	14,875
Charge offs	(108)		(424)
Recoveries	319		1,262
Net Charge offs	211		837
Provision for credit losses	(874)		(310)
Financing Receivable, Allowance for Credit Loss, Ending Balance	14,740		15,403
Allowance for credit losses on loans
Charge offs	(108)		(424)
Recoveries	319		1,262
Net Charge offs	211		837
Allowance for Loan Losses [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	12,638	11,390	11,390
Charge offs	(1,790)		(5,453)
Recoveries	252		978
Net Charge offs	(1,537)		(4,475)
Provision for credit losses	1,630		5,723
Financing Receivable, Allowance for Credit Loss, Ending Balance	12,731		12,638
Allowance for credit losses on loans
Charge offs	(1,790)		(5,453)
Recoveries	252		978
Net Charge offs	(1,537)		(4,475)
Allowance for Loan Losses [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	90,809	84,182	84,182
Charge offs	(4,586)		(12,779)
Recoveries	1,104		4,021
Net Charge offs	(3,482)		(8,758)
Provision for credit losses	2,174		15,384
Financing Receivable, Allowance for Credit Loss, Ending Balance	89,501		90,809
Allowance for credit losses on loans
Charge offs	(4,586)		(12,779)
Recoveries	1,104		4,021
Net Charge offs	(3,482)		(8,758)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	34,776	38,776	38,776
Provision for credit losses	(3,000)		(4,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	31,776		34,776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	13,319	12,997	12,997
Provision for credit losses	(757)		321
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	12,562		13,319
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — owner occupied
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	149	103	103
Provision for credit losses	15		46
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	164		149
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	13,468	13,101	13,101
Provision for credit losses	(742)		367
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	12,725		13,468
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — investor
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	480	710	710
Provision for credit losses	37		(230)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	517		480
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	17,024	20,583	20,583
Provision for credit losses	(2,103)		(3,558)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	14,921		17,024
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	17,504	21,292	21,292
Provision for credit losses	(2,066)		(3,788)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	15,438		17,504
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	30,972	34,393	34,393
Provision for credit losses	(2,808)		(3,421)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	28,164		30,972
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	2,629	2,699	2,699
Provision for credit losses	(316)		(70)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	2,313		2,629
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	1,174	1,683	1,683
Provision for credit losses	124		(509)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	1,298		1,174
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	3,803	4,382	4,382
Provision for credit losses	(192)		(579)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	3,612		3,803
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(24,018)		(58,768)
Recoveries	1,930		10,142
Net Charge offs	(22,088)		(48,626)
Allowance for credit losses on loans
Balance at beginning of period	385,870	351,496	351,496
Charge offs	(24,018)		(58,768)
Recoveries	1,930		10,142
Net Charge offs	(22,088)		(48,626)
Provision for credit losses	24,000		83,000
Balance at end of period	$ 387,782		$ 385,870
Percent of Loans	1.31%		1.32%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (19,429)		$ (45,687)
Recoveries	791		3,015
Net Charge offs	(18,638)		(42,672)
Allowance for credit losses on loans
Balance at beginning of period	141,582	132,073	132,073
Charge offs	(19,429)		(45,687)
Recoveries	791		3,015
Net Charge offs	(18,638)		(42,672)
Provision for credit losses	22,445		52,181
Balance at end of period	$ 145,388		$ 141,582
Percent of Loans	1.47%		1.45%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (3)		$ (25)
Recoveries	5		11
Net Charge offs	2		(15)
Allowance for credit losses on loans
Balance at beginning of period	10,759	9,579	9,579
Charge offs	(3)		(25)
Recoveries	5		11
Net Charge offs	2		(15)
Provision for credit losses	1,783		1,195
Balance at end of period	$ 12,544		$ 10,759
Percent of Loans	1.14%		1.01%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (19,432)		$ (45,713)
Recoveries	796		3,026
Net Charge offs	(18,636)		(42,687)
Allowance for credit losses on loans
Balance at beginning of period	152,341	141,652	141,652
Charge offs	(19,432)		(45,713)
Recoveries	796		3,026
Net Charge offs	(18,636)		(42,687)
Provision for credit losses	24,227		53,376
Balance at end of period	$ 157,933		$ 152,341
Percent of Loans	1.44%		1.41%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ 0		$ (252)
Recoveries	0		3,016
Net Charge offs	0		2,763
Allowance for credit losses on loans
Balance at beginning of period	68,338	55,108	55,108
Charge offs	0		(252)
Recoveries	0		3,016
Net Charge offs	0		2,763
Provision for credit losses	4,174		10,467
Balance at end of period	$ 72,512		$ 68,338
Percent of Loans	1.44%		1.33%
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ 0		$ (25)
Recoveries	30		80
Net Charge offs	30		55
Allowance for credit losses on loans
Balance at beginning of period	70,578	66,171	66,171
Charge offs	0		(25)
Recoveries	30		80
Net Charge offs	30		55
Provision for credit losses	(6,383)		4,351
Balance at end of period	$ 64,225		$ 70,578
Percent of Loans	2.81%		3.11%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ 0		$ (277)
Recoveries	30		3,095
Net Charge offs	30		2,819
Allowance for credit losses on loans
Balance at beginning of period	138,916	121,279	121,279
Charge offs	0		(277)
Recoveries	30		3,095
Net Charge offs	30		2,819
Provision for credit losses	(2,209)		14,819
Balance at end of period	$ 136,737		$ 138,916
Percent of Loans	1.87%		1.88%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (19,432)		$ (45,989)
Recoveries	826		6,121
Net Charge offs	(18,606)		(39,868)
Allowance for credit losses on loans
Balance at beginning of period	291,257	262,931	262,931
Charge offs	(19,432)		(45,989)
Recoveries	826		6,121
Net Charge offs	(18,606)		(39,868)
Provision for credit losses	22,018		68,195
Balance at end of period	$ 294,669		$ 291,257
Percent of Loans	1.61%		1.60%
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (89)		$ (952)
Recoveries	27		541
Net Charge offs	(62)		(411)
Allowance for credit losses on loans
Balance at beginning of period	37,808	38,298	38,298
Charge offs	(89)		(952)
Recoveries	27		541
Net Charge offs	(62)		(411)
Provision for credit losses	(1,831)		(79)
Balance at end of period	$ 35,915		$ 37,808
Percent of Loans	0.46%		0.48%
Allowance for Loans Losses and Unfunded Commitments [Member] | Automobile Loan
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (2,600)		$ (5,950)
Recoveries	506		1,241
Net Charge offs	(2,094)		(4,709)
Allowance for credit losses on loans
Balance at beginning of period	24,961	19,619	19,619
Charge offs	(2,600)		(5,950)
Recoveries	506		1,241
Net Charge offs	(2,094)		(4,709)
Provision for credit losses	3,248		10,051
Balance at end of period	$ 26,114		$ 24,961
Percent of Loans	1.06%		1.11%
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (108)		$ (424)
Recoveries	319		1,262
Net Charge offs	211		837
Allowance for credit losses on loans
Balance at beginning of period	18,032	17,574	17,574
Charge offs	(108)		(424)
Recoveries	319		1,262
Net Charge offs	211		837
Provision for credit losses	(1,190)		(380)
Balance at end of period	$ 17,054		$ 18,032
Percent of Loans	2.75%		2.87%
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (1,790)		$ (5,453)
Recoveries	252		978
Net Charge offs	(1,537)		(4,475)
Allowance for credit losses on loans
Balance at beginning of period	13,812	13,073	13,073
Charge offs	(1,790)		(5,453)
Recoveries	252		978
Net Charge offs	(1,537)		(4,475)
Provision for credit losses	1,755		5,214
Balance at end of period	$ 14,029		$ 13,812
Percent of Loans	5.43%		4.97%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	$ (4,586)		$ (12,779)
Recoveries	1,104		4,021
Net Charge offs	(3,482)		(8,758)
Allowance for credit losses on loans
Balance at beginning of period	94,613	$ 88,565	88,565
Charge offs	(4,586)		(12,779)
Recoveries	1,104		4,021
Net Charge offs	(3,482)		(8,758)
Provision for credit losses	1,982		14,805
Balance at end of period	$ 93,112		$ 94,613
Percent of Loans	0.83%		0.86%

XML

Loans Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Loans Information [Line Items]
Interest receivable	$ 167,092	$ 169,569
Loans and Finance Receivables [Member]
Loans Information [Line Items]
Interest receivable	$ 133,000	$ 132,000

XML

Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Summary of core deposit intangibles and other intangibles
Other intangible amortization	$ 2,203	$ 2,203
Core Deposit Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of period			$ 88,109	$ 88,109
Accumulated amortization	(49,841)		(47,638)
Finite-Lived Intangible Assets, Net, Total	38,268		40,471
Other intangible amortization	$ 2,203		$ 8,811

XML

Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2023
Summary of Changes in MSR [Line Items]
Servicing Asset at Fair Value, Amount, Beginning Balance	$ 84,390		$ 77,351	$ 77,351
Additions	877		474	3,564
Paydowns	(1,687)			(7,185)
Change in fair value model assumptions	0			8,881
Changes in fair value of asset	1,646			1,778
Servicing Asset at Fair Value, Amount, Ending Balance	85,226	$ 84,390		84,390
Portfolio Of Residential Mortgage Loans Serviced For Others	$ 6,349,049	$ 7,364,492		$ 7,364,492
Mortgage Servicing Rights Net To Servicing Portfolio	1.34%	1.15%		1.15%
Loans transferred (from) into held for sale from (into) portfolio, net	$ (86,096)		$ 94
Residential mortgage
Summary of Changes in MSR [Line Items]
Loans transferred (from) into held for sale from (into) portfolio, net		$ 969,000
Proceeds from Sale, Loan, Held-for-Sale		$ 844,000

XML

Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Core Deposit Intangibles
Estimated future amortization expense
Nine months ended December 31, 2024	$ 6,608
2025	8,811
2026	8,811
2027	8,811
2028	3,485
2029	1,681
Beyond 2029	61
Finite-Lived Intangible Assets, Net, Total	38,268	$ 40,471
Mortgage Servicing Rights
Estimated future amortization expense
Nine months ended December 31, 2024	6,930
2025	11,133
2026	11,013
2027	10,506
2028	9,628
2029	8,614
Beyond 2029	27,402
Finite-Lived Intangible Assets, Net, Total	$ 85,226

XML

Goodwill and Other Intangible Assets (Details Textuals) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Goodwill, Impaired, Facts and Circumstances Leading to Impairment	no
Goodwill, Impairment Loss	$ 0	$ 0
Goodwill	$ 1,104,992	$ 1,104,992

XML

Short and Long-Term Funding, FHLB Advances (Components of Short-term and Long-term Funding) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Short-term Funding [Abstract]
Federal funds purchased	$ 175,135	$ 220,160
Securities sold under agreements to repurchase	90,536	106,620
Federal funds purchased and securities sold under agreements to repurchase	265,671	326,780
Bank Term Funding Program Funding	500,000	0
Total short-term funding	765,671	326,780
Long-term funding
Subordinated Debt	550,000	550,000
Other Long-term Debt and Capitalized Costs	(7,468)	(7,748)
Finance lease liability	361	383
Long-term Debt	536,055	541,269
TotalShortTermLongTermExcludingFHLB	1,301,726	868,049
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	138,000	740,000
Long-Term Federal Home Loan Bank Advances	1,209,862	1,209,907
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,333,411	1,940,194
Debt, Long-Term and Short-Term, Combined Amount	2,635,137	2,808,243
Fair Value Hedging [Member]
Long-term funding
Subordinated Debt	(6,838)	(1,366)
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	$ (14,451)	$ (9,713)

XML

Short and Long-Term Funding (Remaining Contractual Maturity of the Securities Sold Under Agreements to Repurchase) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Agency mortgage-related securities | Maturity Overnight and on Demand [Member]
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	$ 90,536	$ 106,620

XML

Short and Long-Term Funding (Long-term Funding Narrative) (Details Textuals) - USD ($) $ in Millions		1 Months Ended
	Feb. 10, 2023	Nov. 30, 2014	Mar. 31, 2024
Long-term funding
Fair Value of Pledged Securites to Securities Sold under Agreements to Repurchase			215.00%
Two Thousand Fourteen Subordinated Notes
Long-term funding
Debt Instrument, Issuance Date Month, Year		November 2014
Junior Subordinated Debentures Issued		$ 250
Debt Instrument, Term		10 years
Debt Instrument, Maturity Date Month, Year		January 2025
Debt Instrument Call Date Earliest Month Year		October 2024
Subordinated Borrowing, Interest Rate		4.25%
Two Thousand Twenty Three Subordinated Notes
Long-term funding
Debt Instrument, Issuance Date Month, Year	February 2023
Junior Subordinated Debentures Issued	$ 300
Debt Instrument, Term	10 years
Debt Instrument, Maturity Date Month, Year	March 1, 2033
Debt Instrument, Redemption Period, Start Date	Mar. 01, 2028
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	Mar. 31, 2024	Dec. 31, 2023
Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	$ 122,067	$ 123,723
Less: Legally enforceable master netting agreements	6,463	18,234
Less: Cash collateral pledged/received	55,681	35,855
Derivative Asset	59,923	69,634
Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	238,397	202,958
Less: Legally enforceable master netting agreements	6,463	18,234
Less: Cash collateral pledged/received	0	0
Derivatives (trading liabilities)	231,934	184,724
Designated as Hedging Instrument | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	2,788	8,707
Designated as Hedging Instrument | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	1,350,000	2,300,000
Designated as Hedging Instrument | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	147,695	231,566
Designated as Hedging Instrument | Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	10,915	3,876
Designated as Hedging Instrument | Liability | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	1,750,000	550,000
Designated as Hedging Instrument | Liability | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	263,335	189,212
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	119,279	115,016
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	3,770,832	3,603,513
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	115,002	87,526
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	49,808	29,490
Not Designated as Hedging Instrument [Member] | Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	227,482	199,082
Not Designated as Hedging Instrument [Member] | Liability | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	6,262,958	6,528,471
Not Designated as Hedging Instrument [Member] | Liability | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	88,602	135,654
Not Designated as Hedging Instrument [Member] | Liability | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	98,000	51,500
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	666	439
Fair Value, Measurements, Recurring | Designated as Hedging Instrument
Derivative Instrument Detail [Abstract]
Derivative Asset	2,164	8,075
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	230	2,946
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	113,337	111,623
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	4,956	2,746
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset	5,276	2,954
Derivatives (trading liabilities)	4,956	2,746
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
Derivative Instrument Detail [Abstract]
Derivative Asset	2,164	8,075
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset	2,164	8,075
Derivatives (trading liabilities)	10,685	930
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset	624	632
Derivatives (trading liabilities)	230	2,946
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	113,337	111,623
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset	113,337	111,623
Derivatives (trading liabilities)	222,303	195,662
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	4,956	2,746
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	666	439
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)		673
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Designated as Hedging Instrument
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Designated as Hedging Instrument | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	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	666	$ 439
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]
Derivatives (trading liabilities)	$ 222

XML

Derivative and Hedging Activities Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Balance Sheet Recording of Fair Value Hedge [Line Items]
Carrying amount excluded for foreign currency loans	$ 411,000	$ 421,000
Derivative Financial Instruments, Liabilities [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivatives (trading liabilities)	(1,128,711)	(1,138,921)
Fair Value Hedging [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	21,289	11,079
Long-Term Debt [Member] | Derivative Financial Instruments, Liabilities [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivatives (trading liabilities)	(543,162)	(548,634)
Long-Term Debt [Member] | Fair Value Hedging [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	6,838	1,366
Federal Home Loan Bank Advances [Member] | Derivative Financial Instruments, Liabilities [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivatives (trading liabilities)	(585,549)	(590,287)
Federal Home Loan Bank Advances [Member] | Fair Value Hedging [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ 14,451	$ 9,713

XML

Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ (4,863)	$ (1,321)
Interest Income [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(40)	(59)
Interest Income [Member] | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(4,823)	(1,262)
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	5,322	2,515
Interest Expense | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(10,210)	10,724
Interest Expense | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	15,532	(8,209)
Capital markets, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Capital markets, net | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(9,070)	1,802
Capital markets, net | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ 9,070	$ (1,802)

XML

Derivative and Hedging Activities, Cash Flow Hedge Included in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flow Hedge Impacts on AOCI [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ (19,461)	$ 13,763
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 4,823	$ 1,262

XML

Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Capital markets, net | Interest Rate Related Instruments Customer and Mirror [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (71)	$ (70)
Capital markets, net | Foreign Exchange Forward [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	746	228
Mortgage banking, net | Interest Rate-Related Instruments - MSRs Hedge
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(2,937)	2,521
Mortgage banking, net | Interest Rate Lock Commitments [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	227	252
Mortgage banking, net | Forward Contracts [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 451	$ (395)

XML

Derivative and Hedging Activities (Details Textuals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Additional Collateral, Aggregate Fair Value	$ 89,000	$ 93,000
Derivative collateral right to reclaim cash	0	$ 5,000
Derivative Liability Notional Amount, Terminated			$ 500,000
Underlying Hedged Asset, Amortized Cost Basis	260,000
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months	$ 12,000
Maximum Length of Time Hedged in Cash Flow Hedge	38 months
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	$ 1,000

XML

Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative assets
Gross Amounts Recognized	$ 102,956	$ 87,075
Derivative Liabilities Offset	(6,463)	(18,234)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(55,681)	(35,855)
Net Amounts Presented on the Consolidated Balance Sheets	40,812	32,985
Gross Amounts Not Offset on the Consolidated Balance Sheets	(32,683)	(32,985)
Derivative Asset, Fair Value, Amount Offset Against Collateral	8,129	0
Derivative liabilities
Gross Amounts Recognized	17,172	18,767
Derivative Liability, Fair Value, Gross Asset	(6,463)	(18,234)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Net Amounts Presented on the Consolidated Balance Sheets	10,709	533
Gross Amounts Not Offset on the Consolidated Balance Sheets	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 10,709	$ 533

XML

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters, Summary of Lending Related and Other Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments, Fair Value	$ 0	$ 0
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments By Type [Domain]	10,828,869	11,170,147
Commercial letters of credit(a)
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments By Type [Domain]	4,580	3,697
Standby letters of credit(c)
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments By Type [Domain]	230,396	212,029
Lines of Credit, Fair Value Disclosure	$ 2,000	$ 2,000

XML

Commitment, Changes in the Allowance for Unfunded Commitments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	$ 34,776	$ 38,776
Provision for credit losses	(3,000)	(4,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 31,776	$ 34,776

XML

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2024	Jun. 30, 2023	Dec. 31, 2023
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Expense Related to Qualified Affordable Housing Projects	$ 9,000,000
Remaining Investment in Qualified Affordable Housing Projects	212,000,000		$ 215,000,000
Variable Interest Entity Reporting Entity Involvement Unfunded Obligation Amount	31,000,000		27,000,000
Qualified Affordable Housing Investments, Impairment Loss	0	$ 0
Loans Repurchased Under Make Whole Requests	$ 1,000,000		5,000,000
Loans Sold To Outside Investors Loss ReimbursementSettlement Paid		$ 0
Make Whole Requests, Loan Origination Date, Majority	Jan. 01, 2021
Loans Sold To Outside Investors Original Amount	$ 3,900,000,000
Loans Sold To Outside Investors Remaining Outstanding Amount	3,300,000,000
Mortgage Repurchase Reserve	704,000		835,000
Residential Mortgage Loans Sold With Recourse Risk	15,000,000
Residential Mortgage Loans Sold With Credit Recourse Risk	37,000,000		16,000,000
Residential Mortgage Loans with Credit Risk Recourse	0		0
SBA Loan Fund, Remaining Unfunded Equity Contribution	3,000,000
UnconsolidatedProjectsLowIncomeHousing [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	215,000,000		$ 219,000,000
PrincipalInvestmentCommitment [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	$ 40,000,000

XML

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	$ 3,724,148	$ 3,600,892
Held-to-maturity, Fair Value	3,301,284	3,380,624
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,833,043	3,860,235
Equity Securities, FV-NI and without Readily Determinable Fair Value	19,571	41,651
FHLB and Federal Reserve Bank stocks	173,968	229,171
Assets	41,137,084	41,015,855
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	6,254,135	6,119,956
Deposits	33,713,158	33,446,049
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	265,671	326,780
Bank Term Funding Program Funding	500,000	0
Short-Term Debt	765,671	326,780
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,333,411	1,940,194
Liabilities	36,968,412	36,841,882
Standby letters of credit(c)
Liabilities, Fair Value Disclosure
Lending Related Commitments By Type [Domain]	230,396	212,029
Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	40,812	32,985
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	10,709	533
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	429,859	484,384
Interest-bearing Deposits in Banks and Other Financial Institutions	420,114	425,089
Federal funds sold and securities purchased under agreements to resell	1,610	14,350
Equity Securities, FV-NI	7,071	31,651
Equity Securities, FV-NI and without Readily Determinable Fair Value	19,571	41,651
FHLB and Federal Reserve Bank stocks	173,968	229,171
Residential Held-for-sale, Fair Value Disclosure	52,414	33,011
Loan, Held-for-Sale, Fair Value Disclosure		90,303
Loans and Leases Receivable, Net Amount	29,138,257	28,865,124
Loans Receivable, Fair Value Disclosure	27,739,448	27,371,086
Bank and corporate owned life insurance	685,089	682,649
Servicing Asset	85,226	84,390
Assets, Fair Value Disclosure	36,754,723	36,561,249
Assets	38,685,290	38,534,897
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	6,254,135	6,119,956
Deposits, Savings Deposits	5,124,639	4,835,701
Interest-Bearing Domestic Deposit, Demand	8,747,127	8,843,967
Deposits, Money Market Deposits	6,721,674	6,330,453
Brokered cds and other time deposits	3,931,230	4,447,479
Brokered cds and other time deposits fair value	3,931,230	4,447,479
Time Deposits, at Carrying Value	2,934,352	2,868,494
Time Deposits	2,934,352	2,868,494
Deposits	33,713,158	33,446,049
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	265,661	326,757
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	265,671	326,780
Bank Term Funding Program Funding, Fair Value Disclosure	497,959
Bank Term Funding Program Funding	500,000
Short-Term Debt	765,671
Short-term Debt, Fair Value	763,620
Federal Home Loan Bank Borrowings, Fair Value Disclosure	1,320,280	1,944,600
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,333,411	1,940,194
Other long-term funding	536,055	541,269
Long-term Debt, Fair Value	517,009	534,983
Repayments of Lines of Credit	2,347	2,157
Liabilities, Fair Value Disclosure	36,554,811	36,457,504
Liabilities	36,589,039	36,459,407
Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	222	673
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	666	439
Fair Value, Measurements, Recurring | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,164	8,075
Foreign Currency Contract, Asset, Fair Value Disclosure	624	632
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	10,685	930
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	230	2,946
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	113,337	111,623
Foreign Currency Contract, Asset, Fair Value Disclosure	5,276	2,954
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	222,303	195,662
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	4,956	2,746
US Treasury Securities
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	35,558	35,902
Held-to-maturity, Fair Value	969	963
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	35,558	35,902
Held-to-maturity, Fair Value	969	963
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	80,830	91,817
Held-to-maturity, Fair Value	1,523,734	1,554,059
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,676,275	1,682,473
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	80,830	91,817
Held-to-maturity, Fair Value	1,523,658	1,553,984
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,676,199	1,682,398
Residential Related Securities | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,090,998	1,120,794
Held-to-maturity, Fair Value	771,944	804,393
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	930,148	941,973
Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,214,513	2,042,675
Held-to-maturity, Fair Value	44,457	46,170
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	48,043	48,979
Residential Related Securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,090,998	1,120,794
Held-to-maturity, Fair Value	771,944	804,393
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	930,148	941,973
Residential Related Securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,214,513	2,042,675
Held-to-maturity, Fair Value	44,457	46,170
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	48,043	48,979
Residential Related Securities | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	281,069	289,507
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	341,153	345,083
Commercial mortgage-related securities | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	17,008	16,937
Held-to-maturity, Fair Value	628,928	632,914
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	779,310	780,995
Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	152,232	154,793
Held-to-maturity, Fair Value	50,183	52,619
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	57,114	59,733
Commercial mortgage-related securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	17,008	16,937
Held-to-maturity, Fair Value	628,928	632,914
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	779,310	780,995
Commercial mortgage-related securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	152,232	154,793
Held-to-maturity, Fair Value	50,183	52,619
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	57,114	59,733
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	129,154	133,975
Held-to-maturity, Fair Value	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	129,154	133,975
US Government-sponsored Enterprises Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	890	1,051
Held-to-maturity, Fair Value	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	890	1,051
Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,965	2,950
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	3,724,148	3,600,892
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	3,301,209	3,380,550
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,832,967	3,860,160
Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	429,859	484,384
Interest-bearing Deposits in Banks and Other Financial Institutions	420,114	425,089
Federal funds sold and securities purchased under agreements to resell	1,610	14,350
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	429,859	484,384
Interest-bearing Deposits in Banks and Other Financial Institutions	420,114	425,089
Federal funds sold and securities purchased under agreements to resell	1,610	14,350
Equity Securities, FV-NI	6,966	6,883
FHLB and Federal Reserve Bank stocks	0	0
Residential Held-for-sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure		0
Loans Receivable, Fair Value Disclosure	0	0
Bank and corporate owned life insurance	0	0
Servicing Asset	0	0
Assets, Fair Value Disclosure	895,077	967,570
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	0	0
Deposits, Savings Deposits	0	0
Interest-Bearing Domestic Deposit, Demand	0	0
Deposits, Money Market Deposits	0	0
Brokered cds and other time deposits fair value	0	0
Time Deposits	0	0
Deposits	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	0	0
Bank Term Funding Program Funding	0
Short-term Debt, Fair Value	0
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	0	0
Other long-term funding	0	0
Repayments of Lines of Credit	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
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 | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 1 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	35,558	35,902
Held-to-maturity, Fair Value	969	963
Fair Value, Inputs, Level 1 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Related Securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Related Securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Related Securities | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Commercial mortgage-related securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Commercial mortgage-related securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
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]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 1 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 1 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	35,558	35,902
Fair Value, Inputs, Level 1 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	969	963
Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Bank and corporate owned life insurance	685,089	682,649
Liabilities, Fair Value Disclosure
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,333,411	1,940,194
Other long-term funding	536,055	541,269
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 purchased under agreements to resell	0	0
Equity Securities, FV-NI	0	0
FHLB and Federal Reserve Bank stocks	173,968	229,171
Residential Held-for-sale, Fair Value Disclosure	52,414	33,011
Loan, Held-for-Sale, Fair Value Disclosure		90,303
Loans Receivable, Fair Value Disclosure	0	0
Bank and corporate owned life insurance	685,089	682,649
Servicing Asset	0	0
Assets, Fair Value Disclosure	8,021,701	8,102,995
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	0	0
Deposits, Savings Deposits	0	0
Interest-Bearing Domestic Deposit, Demand	0	0
Deposits, Money Market Deposits	0	0
Brokered cds and other time deposits fair value	3,931,230	4,447,479
Time Deposits	2,934,352	2,868,494
Deposits	6,865,582	7,315,973
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	265,661	326,757
Bank Term Funding Program Funding	497,959
Short-term Debt, Fair Value	763,620
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,320,280	1,944,600
Other long-term funding	517,009	534,983
Repayments of Lines of Credit	2,347	2,157
Liabilities, Fair Value Disclosure	9,707,013	10,326,755
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	5,276	2,954
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	4,956	2,746
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
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 | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,164	8,075
Foreign Currency Contract, Asset, Fair Value Disclosure	624	632
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	10,685	930
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	624	632
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	230	2,946
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	113,337	111,623
Foreign Currency Contract, Asset, Fair Value Disclosure	5,276	2,954
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	222,303	195,662
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	4,956	2,746
Fair Value, Inputs, Level 2 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
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]
AFS investment securities, at fair value	80,830	91,817
Held-to-maturity, Fair Value	1,523,658	1,553,984
Fair Value, Inputs, Level 2 | Residential Related Securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,090,998	1,120,794
Held-to-maturity, Fair Value	771,944	804,393
Fair Value, Inputs, Level 2 | Residential Related Securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,214,513	2,042,675
Held-to-maturity, Fair Value	44,457	46,170
Fair Value, Inputs, Level 2 | Residential Related Securities | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	281,069	289,507
Fair Value, Inputs, Level 2 | Commercial mortgage-related securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	17,008	16,937
Held-to-maturity, Fair Value	628,928	632,914
Fair Value, Inputs, Level 2 | Commercial mortgage-related securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	152,232	154,793
Held-to-maturity, Fair Value	50,183	52,619
Fair Value, Inputs, Level 2 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	129,154	133,975
Fair Value, Inputs, Level 2 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	890	1,051
Fair Value, Inputs, Level 2 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,965	2,950
Fair Value, Inputs, Level 2 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	3,688,590	3,564,990
Fair Value, Inputs, Level 2 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	3,300,239	3,379,586
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	105	24,769	$ 19,225
Loans and Leases Receivable, Net Amount	29,138,257	28,865,124
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 purchased under agreements to resell	0	0
Equity Securities, FV-NI	105	24,769
FHLB and Federal Reserve Bank stocks	0	0
Residential Held-for-sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure		0
Loans Receivable, Fair Value Disclosure	27,739,448	27,371,086
Bank and corporate owned life insurance	0	0
Servicing Asset	85,226	84,390
Assets, Fair Value Disclosure	27,825,445	27,480,684
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	6,254,135	6,119,956
Deposits, Savings Deposits	5,124,639	4,835,701
Interest-Bearing Domestic Deposit, Demand	8,747,127	8,843,967
Deposits, Money Market Deposits	6,721,674	6,330,453
Brokered cds and other time deposits fair value	0	0
Time Deposits	0	0
Deposits	26,847,575	26,130,076
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	0	0
Bank Term Funding Program Funding	0
Short-term Debt, Fair Value	0
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	0	0
Other long-term funding	0	0
Repayments of Lines of Credit	0	0
Liabilities, Fair Value Disclosure	26,847,797	26,130,749
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	222	673
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	666	439
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure
Derivatives (trading liabilities)	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	666	439
Fair Value, Inputs, Level 3 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
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]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Related Securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Related Securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Related Securities | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Commercial mortgage-related securities | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Commercial mortgage-related securities | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
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]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 3 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 3 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	0	0
Fair Value, Inputs, Level 3 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity, Fair Value	0	0
Fair Value, Inputs, NAV | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	$ 12,500	$ 10,000

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Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Fair Value, Measurements, Recurring - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Interest rate lock commitments to originate residential mortgage loans held for sale
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 439	$ 86
New production	1,820	6,557
Closed loans / settlements	(1,546)	(4,171)
Other	(46)	(2,033)
Change in mortgage derivative	227	352
Ending Balance	666	439
Derivative Financial Instruments, Liabilities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	673	46
New production	(590)	(1,816)
Closed loans / settlements	188	2,494
Other	(49)	(51)
Change in mortgage derivative	(451)	627
Ending Balance	222	673
Total derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	(234)	40
New production	2,409	8,373
Closed loans / settlements	(1,734)	(6,665)
Other	3	(1,982)
Change in mortgage derivative	678	(274)
Ending Balance	$ 444	$ (234)

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Fair Value Measurements Equity Securities Roll Forward (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity Securities without Readily Determinable Fair Value [Line Items]
Equity Securities, FV-NI	$ 105	$ 24,769	$ 19,225
Equity Securities, FV-NI, Realized Gain (Loss)	4,054	5,861
Payments to Acquire Equity Securities, FV-NI	8	11
Proceeds from Sale of Equity Securities, FV-NI	$ (28,725)	$ (329)

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Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity Securities without Readily Determinable Fair Value, Amount	$ 13,000	$ 35,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
OREO(b)	102	3,139
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount	21	2,532
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Individually evaluated loans	67,625	47,221
Provision for credit losses	$ 22,305	45,709
Equity Securities without Readily Determinable Fair Value, Amount		24,671
Gain on sale and net write-up (down) of equity securities		$ 5,785

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Fair Value Measurements Fair Value Unobservable Level 3 Measurements (Details) - Fair Value, Inputs, Level 3	3 Months Ended
	Mar. 31, 2024
Discounted Cash Flow | Mortgage Servicing Rights | 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 | Mortgage Servicing Rights | 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 | Mortgage Servicing Rights | 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	6.00%
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 Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	25.00%
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 Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	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 Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	86.00%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable | 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	11.00%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable | 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	56.00%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable | 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	52.00%

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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
	Mar. 31, 2024	Mar. 31, 2023
RAP
Net period benefit cost for the pension and postretirement plans
Defined Benefit Plan, Description	The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet the eligibility requirements. The benefits are based primarily on years of service and the employee’s eligible compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Retirement plans of acquired entities are typically merged into the RAP depending on the terms of the merger agreement, and, as applicable, credit is usually applied to employees for years of service at the acquired institution for vesting and eligibility purposes.
Service cost	$ 874	$ 796
Interest cost	2,719	2,686
Expected return on plan assets	(8,650)	(8,202)
Amortization of prior service cost	(53)	(63)
Amortization of actuarial loss	0	37
Total net periodic pension cost	(5,111)	(4,746)
Postretirement Plan
Net period benefit cost for the pension and postretirement plans
Interest cost	18	20
Amortization of prior service cost	(19)	(19)
Amortization of actuarial loss	(7)	(7)
Total net periodic pension cost	$ (8)	$ (7)

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Retirement Plans (Details Textuals) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
RAP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0

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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Income Statement Data Abstract
Net interest income	$ 257,858	$ 274,010
Net intersegment interest (expense)	0	0
Segment net interest income	257,858	274,010
Noninterest income	64,985	62,073
Total revenue	322,842	336,083
Provision for credit losses	24,001	17,971
Noninterest expense	197,657	187,412
Income before income taxes	101,185	130,700
Income tax expense (benefit)	20,016	27,340
Net income	81,169	103,360
Segment Balance Sheet Data
Allocated goodwill	1,104,992	1,104,992
Operating Segments | Corporate and Commercial Specialty
Segment Income Statement Data Abstract
Net interest income	242,931	219,123
Net intersegment interest (expense)	(93,736)	(80,980)
Segment net interest income	149,195	138,143
Noninterest income	34,422	32,717
Total revenue	183,617	170,860
Provision for credit losses	15,428	13,782
Noninterest expense	66,350	62,119
Income before income taxes	101,839	94,960
Income tax expense (benefit)	21,081	17,726
Net income	80,758	77,234
Segment Balance Sheet Data
Allocated goodwill	525,836	525,836
Operating Segments | Community, Consumer, and Business
Segment Income Statement Data Abstract
Net interest income	58,192	80,284
Net intersegment interest (expense)	130,159	88,079
Segment net interest income	188,351	168,363
Noninterest income	24,494	25,947
Total revenue	212,845	194,310
Provision for credit losses	6,825	6,758
Noninterest expense	110,490	111,735
Income before income taxes	95,530	75,817
Income tax expense (benefit)	20,062	15,922
Net income	75,468	59,895
Segment Balance Sheet Data
Allocated goodwill	579,156	579,156
Operating Segments | Risk Management and Shared Services
Segment Income Statement Data Abstract
Net interest income	(43,266)	(25,397)
Net intersegment interest (expense)	(36,422)	(7,099)
Segment net interest income	(79,688)	(32,496)
Noninterest income	6,068	3,409
Total revenue	(73,620)	(29,087)
Provision for credit losses	1,747	(2,568)
Noninterest expense	20,817	13,558
Income before income taxes	(96,184)	(40,077)
Income tax expense (benefit)	(21,127)	(6,307)
Net income	(75,058)	(33,770)
Segment Balance Sheet Data
Allocated goodwill	$ 0	$ 0

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Segment Reporting (Details Textuals)	3 Months Ended
	Mar. 31, 2024 segment
Segment Reporting [Abstract]
Number of Reportable Segments	3

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (171,096)
Investment securities losses, net	(197)	$ 0
HTM investment securities, net, at amortized cost(a)	(2,060)	(2,267)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(19,461)	13,763
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,823	1,262
Personnel expense	(119,395)	(116,420)
Net other comprehensive (loss) during period	(38,785)	39,211
Ending Balance	(209,881)
AFS Investment Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(148,641)	(233,192)
Other comprehensive (loss) before reclassifications	(29,889)	36,478
Investment securities losses, net	197
HTM investment securities, net, at amortized cost(a)	2,060	2,267
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0	0
Personnel expense	0	0
Other expense	0	0
Income tax benefit (expense)	6,885	(9,892)
Net other comprehensive (loss) during period	(20,746)	28,853
Ending Balance	(169,388)	(204,339)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	3,080	3,360
Other comprehensive (loss) before reclassifications	0	0
Investment securities losses, net	0
HTM investment securities, net, at amortized cost(a)	0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(19,461)	13,763
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,823	1,262
Personnel expense	0	0
Other expense	0	0
Income tax benefit (expense)	(1,688)	(4,694)
Net other comprehensive (loss) during period	(16,326)	10,331
Ending Balance	(13,246)	13,691
Defined Benefit Pension and Postretirement Obligations
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(25,535)	(42,968)
Other comprehensive (loss) before reclassifications	0	0
Investment securities losses, net	0
HTM investment securities, net, at amortized cost(a)	0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0	0
Personnel expense	(72)	(81)
Other expense	(7)	30
Income tax benefit (expense)	(1,633)	79
Net other comprehensive (loss) during period	(1,712)	27
Ending Balance	(27,247)	(42,940)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(171,096)	(272,799)
Other comprehensive (loss) before reclassifications	(29,889)	36,478
Investment securities losses, net	197
HTM investment securities, net, at amortized cost(a)	2,060	2,267
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(19,461)	13,763
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,823	1,262
Personnel expense	(72)	(81)
Other expense	(7)	30
Income tax benefit (expense)	3,564	(14,507)
Net other comprehensive (loss) during period	(38,785)	39,211
Ending Balance	$ (209,881)	$ (233,588)

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Leases Lease, Cost and Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Operating lease costs	$ 1,545	$ 1,464
Finance lease costs	23	23
Operating lease cash flows	1,844	1,828
Finance lease cash flows	$ 23	$ 22

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Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease right-of-use asset	$ 23,310	$ 24,712
Finance lease right-of-use asset	347	368
Operating lease liability	25,813	27,311
Finance lease liability	$ 361	$ 383

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Leases Operating Lease Information (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 28,476	$ 30,187
Operating Lease, Weighted Average Remaining Lease Term	5 years 8 months 23 days	5 years 10 months 17 days
Operating Lease, Weighted Average Discount Rate, Percent	3.21%	3.19%
Finance Lease, Liability, Payment, Due	$ 370	$ 394
Finance Lease, Weighted Average Remaining Lease Term	4 years	4 years 3 months
Finance Lease, Weighted Average Discount Rate, Percent	1.32%	1.32%
Retail and corporate offices
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 24,223	$ 25,729
Operating Lease, Weighted Average Remaining Lease Term	5 years 7 months 9 days	5 years 9 months 3 days
Operating Lease, Weighted Average Discount Rate, Percent	3.14%	3.12%
Finance Lease, Liability, Payment, Due	$ 370	$ 394
Finance Lease, Weighted Average Remaining Lease Term	4 years	4 years 3 months
Finance Lease, Weighted Average Discount Rate, Percent	1.32%	1.32%
Land
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 3,846	$ 4,050
Operating Lease, Weighted Average Remaining Lease Term	6 years 10 months 13 days	6 years 11 months 23 days
Operating Lease, Weighted Average Discount Rate, Percent	3.49%	3.48%
Equipment
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 408	$ 408
Operating Lease, Weighted Average Remaining Lease Term	2 years 3 months	2 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	4.62%	4.62%

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Leases Amortization of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Operating Leases
Nine months ended December 31, 2024	$ 4,828
2025	5,629
2026	5,023
2027	4,312
2028	3,428
Beyond 2028	5,257
Total lease payments	28,476	$ 30,187
Less: interest	2,663
Present value of lease payments	25,813	27,311
Finance Leases
Nine months ended December 31, 2024	69
2025	93
2026	93
2027	93
2028	23
Beyond 2028	0
Total lease payments	370	394
Less: interest	9
Present value of lease payments	361	$ 383
Total Leases
Nine months ended December 31, 2024	4,898
2025	5,721
2026	5,116
2027	4,404
2028	3,451
Beyond 2028	5,257
Total lease payments	28,847
Less: interest	2,673
Present value of lease payments	$ 26,174

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Leases (Details Textuals) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Additional operating leases	$ 6	$ 3
Minimum
Lessee, Lease, Description [Line Items]
Operating lease terms	1 year
Additional operating lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease terms	39 years
Additional operating lease terms	11 years