10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 _________________________________________

FORM 10-Q

_________________________________________

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

For the quarterly period ended March 31, 2024

OR

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

For the transition period from              to

Commission File Number 001-35077

_____________________________________ 

WINTRUST FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter) 

Illinois	36-3873352
(State of incorporation or organization)	(I.R.S. Employer Identification No.)

9700 W. Higgins Road, Suite 800

Rosemont, Illinois 60018

(Address of principal executive offices)

(847) 939-9000

(Registrant’s telephone number, including area code)

Title of Each Class	Ticker Symbol	Name of Each Exchange on Which Registered
Common Stock, no par value	WTFC	The NASDAQ Global Select Market
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, no par value	WTFCM	The NASDAQ Global Select Market
Depositary Shares, Each Representing a 1/1,000th Interest in a Share of	WTFCP	The NASDAQ Global Select Market
6.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E, no par value

____________________________________ 

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 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 and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files).    Yes  ☑    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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. (Check one):

Large accelerated filer	☑		Accelerated filer	☐
Non-accelerated filer	☐	(Do not check if a smaller reporting company)	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  ☑

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock — no par value, 61,753,551 shares, as of April 30, 2024

TABLE OF CONTENTS

		Page
	PART I. — FINANCIAL INFORMATION
ITEM 1.	Financial Statements	1
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	45
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	69
ITEM 4.	Controls and Procedures	70
	PART II. — OTHER INFORMATION
ITEM 1.	Legal Proceedings	70
ITEM 1A.	Risk Factors	71
ITEM 2.	Unregistered Sales of Equity Securities, Use of Proceeds and Issuer Purchases of Equity Securities	71
ITEM 3.	Defaults Upon Senior Securities	NA
ITEM 4.	Mine Safety Disclosures	NA
ITEM 5.	Other Information	72
ITEM 6.	Exhibits	72
	Signatures	73

PART I

ITEM 1. FINANCIAL STATEMENTS

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CONDITION
	(Unaudited)				(Unaudited)
(Dollars in thousands, except per share data)	March 31, 2024		December 31, 2023		March 31, 2023
Assets
Cash and due from banks	$	379,825	$	423,404	$	445,928
Federal funds sold and securities purchased under resale agreements	61		60		58
Interest-bearing deposits with banks	2,131,077		2,084,323		1,563,578
Available-for-sale securities, at fair value	4,387,598		3,502,915		3,259,845
Held-to-maturity securities, at amortized cost, net of allowance for credit losses of $329, $347 and $463 at March 31, 2024, December 31, 2023 and March 31, 2023, respectively ($3.1 billion, $3.2 billion and $3.0 billion fair value at March 31, 2024, December 31, 2023 and March 31, 2023, respectively)	3,810,015		3,856,916		3,606,391
Trading account securities	2,184		4,707		102
Equity securities with readily determinable fair value	119,777		139,268		111,943
Federal Home Loan Bank and Federal Reserve Bank stock	224,657		205,003		244,957
Brokerage customer receivables	13,382		10,592		16,042
Mortgage loans held-for-sale, at fair value	339,884		292,722		302,493
Loans, net of unearned income	43,230,706		42,131,831		39,565,471
Allowance for loan losses	(348,612)		(344,235)		(287,972)
Net loans	42,882,094		41,787,596		39,277,499
Premises, software and equipment, net	744,769		748,966		760,283
Lease investments, net	283,557		281,280		256,301
Accrued interest receivable and other assets	1,580,142		1,551,899		1,413,795
Trade date securities receivable	—		690,722		939,758
Goodwill	656,181		656,672		653,587
Other acquisition-related intangible assets	21,730		22,889		20,951
Total assets	$	57,576,933	$	56,259,934	$	52,873,511
Liabilities and Shareholders’ Equity
Deposits:
Non-interest-bearing	$	9,908,183	$	10,420,401	$	11,236,083
Interest-bearing	36,540,675		34,976,769		31,482,128
Total deposits	46,448,858		45,397,170		42,718,211
Federal Home Loan Bank advances	2,676,751		2,326,071		2,316,071
Other borrowings	575,408		645,813		583,548
Subordinated notes	437,965		437,866		437,493
Junior subordinated debentures	253,566		253,566		253,566
Accrued interest payable and other liabilities	1,747,985		1,799,922		1,549,116
Total liabilities	52,140,533		50,860,408		47,858,005
Shareholders’ Equity:
Preferred stock, no par value; 20,000,000 shares authorized:
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at March 31, 2024, December 31, 2023 and March 31, 2023	125,000		125,000		125,000
Series E - $25,000 liquidation value; 11,500 shares issued and outstanding at March 31, 2024, December 31, 2023 and March 31, 2023	287,500		287,500		287,500
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at March 31, 2024, December 31, 2023 and March 31, 2023; 61,798,213 shares issued at March 31, 2024, 61,268,566 shares issued at December 31, 2023 and 61,197,979 shares issued at March 31, 2023	61,798		61,269		61,198
Surplus	1,954,532		1,943,806		1,913,947
Treasury stock, at cost, 61,498 shares at March 31, 2024, 24,940 shares at December 31, 2023, and 21,564 shares at March 31, 2023	(5,757)		(2,217)		(1,966)
Retained earnings	3,498,475		3,345,399		2,997,263
Accumulated other comprehensive loss	(485,148)		(361,231)		(367,436)
Total shareholders’ equity	5,436,400		5,399,526		5,015,506
Total liabilities and shareholders’ equity	$	57,576,933	$	56,259,934	$	52,873,511

See accompanying notes to unaudited consolidated financial statements.

1

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)

	Three Months Ended
(Dollars in thousands, except per share data)	March 31, 2024		March 31, 2023
Interest income
Interest and fees on loans	$	710,341	$	558,692
Mortgage loans held-for-sale	4,146		3,528
Interest-bearing deposits with banks	16,658		13,468
Federal funds sold and securities purchased under resale agreements	19		70
Investment securities	69,678		59,943
Trading account securities	18		14
Federal Home Loan Bank and Federal Reserve Bank stock	4,478		3,680
Brokerage customer receivables	175		295
Total interest income	805,513		639,690
Interest expense
Interest on deposits	299,532		144,802
Interest on Federal Home Loan Bank advances	22,048		19,135
Interest on other borrowings	9,248		7,854
Interest on subordinated notes	5,487		5,488
Interest on junior subordinated debentures	5,004		4,416
Total interest expense	341,319		181,695
Net interest income	464,194		457,995
Provision for credit losses	21,673		23,045
Net interest income after provision for credit losses	442,521		434,950
Non-interest income
Wealth management	34,815		29,945
Mortgage banking	27,663		18,264
Service charges on deposit accounts	14,811		12,903
Gains on investment securities, net	1,326		1,398
Fees from covered call options	4,847		10,391
Trading gains, net	677		813
Operating lease income, net	14,110		13,046
Other	42,331		21,009
Total non-interest income	140,580		107,769
Non-interest expense
Salaries and employee benefits	195,173		176,781
Software and equipment	27,731		24,697
Operating lease equipment	10,683		9,833
Occupancy, net	19,086		18,486
Data processing	9,292		9,409
Advertising and marketing	13,040		11,946
Professional fees	9,553		8,163
Amortization of other acquisition-related intangible assets	1,158		1,235
FDIC insurance	14,537		8,669
Other real estate owned expense, net	392		(207)
Other	32,500		30,157
Total non-interest expense	333,145		299,169
Income before taxes	249,956		243,550
Income tax expense	62,662		63,352
Net income	$	187,294	$	180,198
Preferred stock dividends	6,991		6,991
Net income applicable to common shares	$	180,303	$	173,207
Net income per common share—Basic	$	2.93	$	2.84
Net income per common share—Diluted	$	2.89	$	2.80
Cash dividends declared per common share	$	0.45	$	0.40
Weighted average common shares outstanding	61,481		60,950
Dilutive potential common shares	928		873
Average common shares and dilutive common shares	62,409		61,823

See accompanying notes to unaudited consolidated financial statements.

2

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

	Three Months Ended
(In thousands)	March 31, 2024		March 31, 2023
Net income	$	187,294	$	180,198
Unrealized (losses) gains on available-for-sale securities
Before tax	(77,888)		47,040
Tax effect	20,601		(12,537)
Net of tax	(57,287)		34,503
Reclassification of net gains on available-for-sale securities included in net income
Before tax	(26)		560
Tax effect	7		(151)
Net of tax	(19)		409
Reclassification of amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale
Before tax	50		43
Tax effect	(13)		(11)
Net of tax	37		32
Net unrealized (losses) gains on available-for-sale securities	(57,305)		34,062
Unrealized (losses) gains on derivative instruments
Before tax	(82,091)		34,666
Tax effect	21,713		(9,238)
Net unrealized (losses) gains on derivative instruments	(60,378)		25,428
Foreign currency adjustment
Before tax	(7,649)		890
Tax effect	1,415		(180)
Net foreign currency adjustment	(6,234)		710
Total other comprehensive (loss) income	(123,917)		60,200
Comprehensive income	$	63,377	$	240,398

See accompanying notes to unaudited consolidated financial statements.

3

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (UNAUDITED)
(Dollars in thousands, except per share data)	Preferred stock		Common stock		Surplus		Treasury stock		Retained earnings		Accumulated other comprehensive income (loss)		Total shareholders’ equity
Balance at January 1, 2023	$	412,500	$	60,797	$	1,902,474	$	(304)	$	2,849,007	$	(427,636)	$	4,796,838
Cumulative effect adjustment from the adoption of ASU 2022-02 (TDR), net of tax	—		—		—		—		(544)		—		(544)
Net income	—		—		—		—		180,198		—		180,198
Other comprehensive income, net of tax	—		—		—		—		—		60,200		60,200
Cash dividends declared on common stock, $0.40 per share	—		—		—		—		(24,407)		—		(24,407)
Dividends on Series D preferred stock, $0.41 per share and Series E preferred stock, $429.69 per share	—		—		—		—		(6,991)		—		(6,991)
Stock-based compensation	—		—		8,295		—		—		—		8,295
Common stock issued for:
Exercise of stock options	—		54		2,162		—		—		—		2,216
Restricted stock awards	—		275		(275)		(1,662)		—		—		(1,662)
Employee stock purchase plan	—		9		685		—		—		—		694
Director compensation plan	—		63		606		—		—		—		669
Balance at March 31, 2023	$	412,500	$	61,198	$	1,913,947	$	(1,966)	$	2,997,263	$	(367,436)	$	5,015,506
Balance at January 1, 2024	$	412,500	$	61,269	$	1,943,806	$	(2,217)	$	3,345,399	$	(361,231)	$	5,399,526
Net income	—		—		—		—		187,294		—		187,294
Other comprehensive loss, net of tax	—		—		—		—		—		(123,917)		(123,917)
Cash dividends declared on common stock, $0.45 per share	—		—		—		—		(27,227)		—		(27,227)
Dividends on Series D preferred stock, $0.41 per share and Series E preferred stock, $429.69 per share	—		—		—		—		(6,991)		—		(6,991)
Stock-based compensation	—		—		9,157		—		—		—		9,157
Common stock issued for:
Exercise of stock options	—		1		24		—		—		—		25
Restricted stock awards	—		505		(469)		(3,540)		—		—		(3,504)
Employee stock purchase plan	—		8		733		—		—		—		741
Director compensation plan	—		15		1,281		—		—		—		1,296
Balance at March 31, 2024	$	412,500	$	61,798	$	1,954,532	$	(5,757)	$	3,498,475	$	(485,148)	$	5,436,400

See accompanying notes to unaudited consolidated financial statements.

4

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

	Three Months Ended
(In thousands)	March 31, 2024		March 31, 2023
Operating Activities:
Net income	$	187,294	$	180,198
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	21,673		23,045
Depreciation, amortization and accretion, net	21,464		18,798
Stock-based compensation expense	9,157		8,295
Amortization of premium on securities, net	190		275
Accretion of discount and deferred fees on loans, net	(3,601)		(4,263)
Mortgage servicing rights fair value changes	(3,210)		10,863
Non-designated derivatives fair value changes, net	1,985		(2,805)
Originations and purchases of mortgage loans held-for-sale	(475,613)		(366,006)
Early buy-out exercises of mortgage loans held-for-sale guaranteed by U.S. government agencies, net of subsequent paydowns or payoffs	(16,562)		(6,334)
Proceeds from sales of mortgage loans held-for-sale	446,262		366,509
Bank owned life insurance (“BOLI”) (gains) losses	(1,651)		1,351
Decrease in trading securities, net	2,523		1,025
(Increase) decrease in brokerage customer receivables, net	(2,790)		345
Gains on mortgage loans sold	(12,000)		(10,795)
Gains on investment securities, net	(1,326)		(1,398)
(Gains) losses on sales of premises and equipment, net	(146)		93
Losses on sales and fair value adjustments of other real estate owned, net	207		99
Increase in accrued interest receivable and other assets, net	(40,478)		(97,024)
Decrease in accrued interest payable and other liabilities, net	(62,253)		(53,830)
Net Cash Provided by Operating Activities	71,125		68,441
Investing Activities:
Proceeds from calls and sales of available-for-sale securities	690,866		934,554
Proceeds from payments and maturities of available-for-sale securities	82,418		74,043
Proceeds from payments, maturities and calls of held-to-maturity securities	46,588		40,342
Proceeds from sales of equity securities with readily determinable fair value	45,000		23,592
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	2,226		67
Purchases of available-for-sale securities	(1,045,047)		(996,433)
Purchases of held-to-maturity securities	—		(6,443)
Purchases of equity securities with readily determinable fair value	(24,000)		(23,697)
Purchases of equity securities without readily determinable fair value	(2,900)		(4,850)
(Purchases) redemptions of Federal Home Loan Bank and Federal Reserve Bank stock, net	(19,654)		20,198
Distributions from investments in partnerships, net	242		2,794
Proceeds from sales of other real estate owned	—		435
(Increase) decrease in interest-bearing deposits with banks, net	(49,062)		424,842
Increase in loans, net	(1,135,248)		(365,885)
Purchases of premises and equipment, net	(10,599)		(9,139)
Net Cash (Used for) Provided by Investing Activities	(1,419,170)		114,420
Financing Activities:
Increase (decrease) in deposit accounts, net	1,051,686		(184,335)
Decrease in other borrowings, net	(62,239)		(13,968)
Increase in Federal Home Loan Bank advances, net	350,680		—
Cash payments to settle contingent consideration liabilities recognized in business combinations	—		(57)
Issuance of common shares resulting from the exercise of stock options, employee stock purchase plan and director compensation plan	2,098		3,579
Common stock repurchases for tax withholdings related to stock-based compensation	(3,540)		(1,662)
Dividends paid	(34,218)		(31,398)
Net Cash Provided by (Used for) Financing Activities	1,304,467		(227,841)
Net Decrease in Cash and Cash Equivalents	(43,578)		(44,980)
Cash and Cash Equivalents at Beginning of Period	423,464		490,966
Cash and Cash Equivalents at End of Period	$	379,886	$	445,986

See accompanying notes to unaudited consolidated financial statements.

5

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(1) Basis of Presentation

The interim consolidated financial statements of Wintrust Financial Corporation and its subsidiaries (collectively, “Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management, reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the interim consolidated financial statements.

The accompanying interim consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles (“GAAP”). The interim unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (“2023 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation.

The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable; however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for credit losses, including the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity securities losses, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company’s significant accounting policies are included in Note (1) “Summary of Significant Accounting Policies” of the 2023 Form 10-K. In preparation of these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users or filed with the SEC.

(2) Recent Accounting Developments

Equity Method and Joint Ventures - Investments in Tax Credit Structures

In March 2023, the FASB issued ASU No. 2023-02, “Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method,” which allows reporting entities the option to apply the proportional amortization method to other tax credit programs besides the Low-Income Housing Tax Credit structures. The guidance requires application of the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing the method at the reporting level entity level. The Company adopted ASU No. 2023-02 as of January 1, 2024. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements.

Segment Reporting

In November 2023, the FASB issued ASU No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” to enhance public entity disclosures regarding significant segment expenses which are regularly reported to an entity’s chief operating decision-maker (“CODM”) and included in a segment’s reported profit or loss. This ASU requires disclosure of the amount and composition of “other segment items,” the title and position of the CODM, and how the CODM uses reported measures of profit or loss to assess segment performance. Further, the guidance requires certain segment disclosures previously provided only annually, on an interim basis. This guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The guidance is to be applied retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this guidance on the consolidated financial statements.

6

Income Tax Disclosures

In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” to enhance the transparency and decision usefulness of income tax disclosures. This ASU requires annually that all entities disclose increasingly disaggregated information on amount of income taxes paid. Further, this ASU requires annually that all public entities must disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a specific quantitative threshold. This guidance is effective for fiscal years beginning after December 15, 2024, and is to be applied either on a prospective basis or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

Compensation – Scope Application of Profits Interest and Similar Awards

In March 2024, the FASB issued ASU No. 2024-01, “Compensation – Stock Compensation (Topic 718): Scope Application of Profits Interest and Similar Awards” which clarifies the guidance by providing an illustrative example to demonstrate how an entity should apply the scope guidance in Topic 718 when determining whether profits interest and similar awards should be accounted for in accordance with Topic 718. For public business entities, this guidance is effective for fiscal years beginning after December 15, 2024, including interim periods therein, and is to be applied either on a prospective basis or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

(3) Business Combinations

On April 3, 2023, the Company completed its acquisition of Rothschild & Co Asset Management US Inc. and Rothschild & Co Risk Based Investments LLC from Rothschild & Co North America Inc. As of the acquisition date, the Company acquired approximately $12.6 million in net assets. As the transaction was determined to be a business combination, the Company recorded goodwill of approximately $2.6 million on the purchase.

(4) Cash and Cash Equivalents

For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

7

(5) Investment Securities

The following tables are a summary of the investment securities portfolios as of the dates shown:

	March 31, 2024
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities
U.S. Treasury	$	61,185	$	—	$	(10)	$	61,175
U.S. government agencies	50,000		—		(4,285)		45,715
Municipal	144,752		569		(4,731)		140,590
Corporate notes:
Financial issuers	83,996		—		(8,264)		75,732
Other	1,000		—		(7)		993
Mortgage-backed: (1)
Residential mortgage-backed securities	4,396,962		480		(520,719)		3,876,723
Commercial (multi-family) mortgage-backed securities	16,225		28		(577)		15,676
Collateralized mortgage obligations	188,240		924		(18,170)		170,994
Total available-for-sale securities	$	4,942,360	$	2,001	$	(556,763)	$	4,387,598
Held-to-maturity securities
U.S. government agencies	$	336,463	$	—	$	(69,998)	$	266,465
Municipal	168,490		258		(4,709)		164,039
Mortgage-backed: (1)
Residential mortgage-backed securities	3,007,304		—		(597,758)		2,409,546
Commercial (multi-family) mortgage-backed securities	6,401		—		(281)		6,120
Collateralized mortgage obligations	234,314		431		(22,983)		211,762
Corporate notes	57,372		8		(3,358)		54,022
Total held-to-maturity securities	$	3,810,344	$	697	$	(699,087)	$	3,111,954
Less: Allowance for credit losses	(329)
Held-to-maturity securities, net of allowance for credit losses	$	3,810,015
Equity securities with readily determinable fair value	$	123,421	$	4,480	$	(8,124)	$	119,777

(1)None of our mortgage-backed securities are subprime.

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	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(In thousands)
Available-for-sale securities
U.S. Treasury	$	6,960	$	8	$	—	$	6,968
U.S. government agencies	50,000		—		(4,876)		45,124
Municipal	144,299		657		(3,998)		140,958
Corporate notes:
Financial issuers	83,996		—		(8,456)		75,540
Other	1,000		—		(9)		991
Mortgage-backed: (1)
Residential Mortgage-backed securities	3,505,012		1,392		(446,784)		3,059,620
Commercial (multi-family) mortgage-backed securities	13,201		68		(289)		12,980
Collateralized mortgage obligations	175,346		1,400		(16,012)		160,734
Total available-for-sale securities	$	3,979,814	$	3,525	$	(480,424)	$	3,502,915
Held-to-maturity securities
U.S. government agencies	$	336,468	$	—	$	(67,058)	$	269,410
Municipal	172,933		565		(3,778)		169,720
Mortgage-backed: (1)
Residential Mortgage-backed securities	3,042,828		1,922		(549,265)		2,495,485
Commercial (multi-family) mortgage-backed securities	6,415		—		(184)		6,231
Collateralized mortgage obligations	241,075		978		(21,502)		220,551
Corporate notes	57,544		7		(3,480)		54,071
Total held-to-maturity securities	$	3,857,263	$	3,472	$	(645,267)	$	3,215,468
Less: Allowance for credit losses	(347)
Held-to-maturity securities, net of allowance for credit losses	$	3,856,916
Equity securities with readily determinable fair value	$	143,312	$	3,500	$	(7,544)	$	139,268

(1)None of our mortgage-backed securities are subprime.

9

	March 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(In thousands)
Available-for-sale securities
U.S. Treasury	$	4,947	$	1	$	—	$	4,948
U.S. government agencies	80,000		—		(5,138)		74,862
Municipal	164,110		439		(4,163)		160,386
Corporate notes:
Financial issuers	93,995		—		(11,320)		82,675
Other	1,000		—		—		1,000
Mortgage-backed: (1)
Mortgage-backed securities	3,300,048		1,787		(445,405)		2,856,430
Collateralized mortgage obligations	95,880		—		(16,336)		79,544
Total available-for-sale securities	$	3,739,980	$	2,227	$	(482,362)	$	3,259,845
Held-to-maturity securities
U.S. government agencies	$	339,608	$	24	$	(70,064)	$	269,568
Municipal	174,720		1,117		(2,880)		172,957
Mortgage-backed: (1)
Mortgage-backed securities	2,872,591		1,197		(533,415)		2,340,373
Collateralized mortgage obligations	161,874		—		(22,431)		139,443
Corporate notes	58,061		14		(4,218)		53,857
Total held-to-maturity securities	$	3,606,854	$	2,352	$	(633,008)	$	2,976,198
Less: Allowance for credit losses	(463)
Held-to-maturity securities, net of allowance for credit losses	$	3,606,391
Equity securities with readily determinable fair value	$	116,296	$	3,065	$	(7,418)	$	111,943

(1)Consisting entirely of residential mortgage-backed securities, none of which are subprime.

Equity securities without readily determinable fair values totaled $63.2 million as of March 31, 2024. Equity securities without readily determinable fair values are included as part of accrued interest receivable and other assets in the Company’s Consolidated Statements of Condition. The Company monitors its equity investments without readily determinable fair values to identify potential transactions that may indicate an observable price change in orderly transactions for the identical or a similar investment of the same issuer, requiring adjustment to its carrying amount. During the three months ended March 31, 2024 and March 31, 2023, the Company recorded no upward or downward adjustments related to such observable price changes, respectively. The Company conducts a quarterly assessment of its equity securities without readily determinable fair values to determine whether impairment exists in such securities, considering, among other factors, the nature of the securities, financial condition of the issuer and expected future cash flows. During the three months ended March 31, 2024, the Company recorded $2,000 of impairment of equity securities without readily determinable fair values. During the three months ended March 31, 2023, the Company recorded no impairment of equity securities without readily determinable fair values.

10

The following table presents the portion of the Company’s available-for-sale investment securities portfolios that have gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at March 31, 2024:

	Continuous unrealized losses existing for less than 12 months				Continuous unrealized losses existing for greater than 12 months				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Available-for-sale securities
U.S. Treasury	$	61,175	$	(10)	$	—	$	—	$	61,175	$	(10)
U.S. government agencies	—		—		45,715		(4,285)		45,715		(4,285)
Municipal	46,448		(324)		69,700		(4,407)		116,148		(4,731)
Corporate notes:
Financial issuers	—		—		75,732		(8,264)		75,732		(8,264)
Other	993		(7)		—		—		993		(7)
Mortgage-backed: (1)
Residential mortgage-backed securities	1,567,822		(15,974)		2,277,921		(504,745)		3,845,743		(520,719)
Commercial (multi-family) mortgage-backed securities	12,686		(577)		—		—		12,686		(577)
Collateralized mortgage obligations	18,112		(83)		71,520		(18,087)		89,632		(18,170)
Total available-for-sale securities	$	1,707,236	$	(16,975)	$	2,540,588	$	(539,788)	$	4,247,824	$	(556,763)

(1)None of our mortgage-backed securities are subprime.

The Company conducts a regular assessment of its investment securities to determine whether securities are experiencing credit losses. Factors for consideration include the nature of the securities, credit ratings or financial condition of the issuer, the extent of the unrealized loss, expected cash flows, market conditions and the Company’s ability to hold the securities through the anticipated recovery period.

The Company does not consider available-for-sale securities with unrealized losses at March 31, 2024 to be experiencing credit losses and recognized no resulting allowance for credit losses for such individually assessed credit losses. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost bases, which may be the maturity dates of the securities. The unrealized losses within each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. Available-for-sale securities with continuous unrealized losses existing for more than twelve months at March 31, 2024 were primarily mortgage-backed securities with unrealized losses due to increased market rates during such period.

See Note (7) “Allowance for Credit Losses” in Item 1 of this report for further discussion regarding any credit losses associated with held-to-maturity securities at March 31, 2024.

The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities recognized in earnings and proceeds received through the sale or call of investment securities:

	Three months ended March 31,
(In thousands)	2024		2023
Realized gains on investment securities	$	1,035	$	605
Realized losses on investment securities	(108)		(45)
Net realized gains on investment securities	927		560
Unrealized gains on equity securities with readily determinable fair value	1,034		2,290
Unrealized losses on equity securities with readily determinable fair value	(633)		(1,452)
Net unrealized gains on equity securities with readily determinable fair value	401		838
Impairment of equity securities without readily determinable fair values	(2)		—
Gains on investment securities, net	$	1,326	$	1,398

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The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of March 31, 2024, December 31, 2023 and March 31, 2023, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties:

	March 31, 2024				December 31, 2023				March 31, 2023
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale securities
Due in one year or less	$	107,680	$	107,285	$	53,162	$	52,945	$	108,880	$	108,429
Due in one to five years	130,137		121,417		132,348		123,985		131,959		122,172
Due in five to ten years	85,212		80,234		82,040		76,869		39,019		35,158
Due after ten years	17,904		15,269		18,705		15,782		64,194		58,112
Mortgage-backed	4,601,427		4,063,393		3,693,559		3,233,334		3,395,928		2,935,974
Total available-for-sale securities	$	4,942,360	$	4,387,598	$	3,979,814	$	3,502,915	$	3,739,980	$	3,259,845
Held-to-maturity securities
Due in one year or less	$	4,652	$	4,616	$	5,169	$	5,142	$	2,302	$	2,300
Due in one to five years	115,707		111,324		109,602		105,835		98,207		93,717
Due in five to ten years	89,538		88,050		99,700		98,718		110,967		110,892
Due after ten years	352,428		280,536		352,474		283,506		360,913		289,473
Mortgage-backed	3,248,019		2,627,428		3,290,318		2,722,267		3,034,465		2,479,816
Total held-to-maturity securities	$	3,810,344	$	3,111,954	$	3,857,263	$	3,215,468	$	3,606,854	$	2,976,198
Less: Allowance for credit losses	(329)				(347)				(463)
Held-to-maturity securities, net of allowance for credit losses	$	3,810,015			$	3,856,916			$	3,606,391

Securities having a carrying value of $7.2 billion at March 31, 2024 as well as securities having a carrying value of $6.9 billion and $5.7 billion at December 31, 2023 and March 31, 2023, respectively, were pledged as collateral for public deposits, trust deposits, Federal Home Loan Bank (“FHLB”) advances and available lines of credit, securities sold under repurchase agreements and derivatives. At March 31, 2024, there were no securities of a single issuer, other than U.S. government-sponsored agency securities, which exceeded 10% of shareholders’ equity.

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(6) Loans

The following table shows the Company’s loan portfolio by category as of the dates shown:

	March 31,			December 31,			March 31,
(Dollars in thousands)	2024			2023			2023
Balance:
Commercial	$	13,503,481		$	12,832,053		$	12,576,985
Commercial real estate	11,633,437			11,344,164			10,239,078
Home equity	340,349			343,976			337,016
Residential real estate	2,890,266			2,769,666			2,505,545
Premium finance receivables—property & casualty	6,940,019			6,903,529			5,738,880
Premium finance receivables—life insurance	7,872,033			7,877,943			8,125,802
Consumer and other	51,121			60,500			42,165
Total loans, net of unearned income	$	43,230,706		$	42,131,831		$	39,565,471
Mix:
Commercial	31		%	30		%	32		%
Commercial real estate	27			27			26
Home equity	1			1			1
Residential real estate	7			7			6
Premium finance receivables—property & casualty	16			16			14
Premium finance receivables—life insurance	18			19			21
Consumer and other	0			0			0
Total loans, net of unearned income	100		%	100		%	100		%

The Company’s loan portfolio is generally comprised of loans to consumers and small to medium-sized businesses, which, for the commercial and commercial real estate portfolios, are located primarily within the geographic market areas that the banks serve. Various niche lending businesses, including franchise lending and insurance agency lending, operate on a national level. The premium finance receivables portfolios are made to customers throughout the United States and Canada. The Company strives to maintain a loan portfolio that is diverse in terms of loan type, industry, borrower, and geographic concentrations. Such diversification reduces the exposure to economic downturns that may occur in different segments of the economy or in different industries.

Certain premium finance receivables are recorded net of unearned income. The unearned income portions of such premium finance receivables were $260.2 million at March 31, 2024, $285.4 million at December 31, 2023 and $244.0 million at March 31, 2023.

Total loans, excluding purchased credit deteriorated (“PCD”) loans, include net deferred loan fees and costs and fair value purchase accounting adjustments totaling $84.9 million at March 31, 2024, $84.2 million at December 31, 2023 and $70.9 million at March 31, 2023.

It is the policy of the Company to review each prospective credit in order to determine the appropriateness and, when required, the adequacy of security or collateral necessary to obtain when making a loan. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to ensure access to collateral, in the event of default, through adherence to state lending laws and the Company’s credit monitoring procedures.

(7) Allowance for Credit Losses

In accordance with ASC 326, the Company is required to measure the allowance for credit losses of financial assets with similar risk characteristics on a collective or pooled basis. In considering the segmentation of financial assets measured at amortized cost into pools, the Company considered various risk characteristics in its analysis. Generally, the segmentation utilized represents the level at which the Company develops and documents its systematic methodology to determine the allowance for credit losses for the financial assets held at amortized cost, specifically the Company's loan portfolio and debt securities classified as held-to-maturity. Descriptions of the Company’s loan portfolio segments and major debt security types are included in Note (5) “Allowance for Credit Losses” of the 2023 Form 10-K.

13

In accordance with ASC 326, the Company elected to not measure an allowance for credit losses on accrued interest. As such accrued interest is written off in a timely manner when deemed uncollectible. Any such write-off of accrued interest will reverse previously recognized interest income. In addition, the Company elected to not include accrued interest within presentation and disclosures of the carrying amount of financial assets held at amortized cost. This election is applicable to the various disclosures included within the Company's financial statements. Accrued interest related to financial assets held at amortized cost is included within accrued interest receivable and other assets within the Company's Consolidated Statements of Condition and totaled $307.8 million at March 31, 2024, $304.5 million at December 31, 2023, and $245.1 million at March 31, 2023.

The tables below show the aging of the Company’s loan portfolio by the segmentation noted above at March 31, 2024, December 31, 2023 and March 31, 2023:

As of March 31, 2024			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	31,740	$	27	$	30,248	$	77,715	$	13,363,751	$	13,503,481
Commercial real estate
Construction and development	1,627		—		818		7,066		2,140,803		2,150,314
Non-construction	37,635		—		15,895		25,932		9,403,661		9,483,123
Home equity	838		—		212		1,617		337,682		340,349
Residential real estate, excluding early buy-out loans	17,901		—		—		24,523		2,704,492		2,746,916
Premium finance receivables
Property and casualty insurance loans	32,648		25,877		15,274		59,729		6,806,491		6,940,019
Life insurance loans	—		—		32,482		100,137		7,739,414		7,872,033
Consumer and other	19		47		16		210		50,829		51,121
Total loans, net of unearned income, excluding early buy-out loans	$	122,408	$	25,951	$	94,945	$	296,929	$	42,547,123	$	43,087,356
Early buy-out loans guaranteed by U.S. government agencies (1)	—		50,217		—		1,047		92,086		143,350
Total loans, net of unearned income	$	122,408	$	76,168	$	94,945	$	297,976	$	42,639,209	$	43,230,706

As of December 31, 2023			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	38,940	$	98	$	19,488	$	85,743	$	12,687,784	$	12,832,053
Commercial real estate
Construction and development	2,205		—		251		1,343		2,080,242		2,084,041
Non-construction	33,254		—		8,264		19,291		9,199,314		9,260,123
Home equity	1,341		—		62		2,263		340,310		343,976
Residential real estate, excluding early buy-out loans	15,391		—		2,325		22,942		2,578,425		2,619,083
Premium finance receivables
Property and casualty insurance loans	27,590		20,135		23,236		50,437		6,782,131		6,903,529
Life insurance loans	—		—		16,206		45,464		7,816,273		7,877,943
Consumer and other	22		54		25		165		60,234		60,500
Total loans, net of unearned income, excluding early buy-out loans	$	118,743	$	20,287	$	69,857	$	227,648	$	41,544,713	$	41,981,248
Early buy-out loans guaranteed by U.S. government agencies (1)	—		57,688		250		328		92,317		150,583
Total loans, net of unearned income	$	118,743	$	77,975	$	70,107	$	227,976	$	41,637,030	$	42,131,831

(1)Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

14

As of March 31, 2023			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	47,950	$	—	$	10,755	$	95,593	$	12,422,687	$	12,576,985
Commercial real estate
Construction and development	5,404		—		4,438		19,616		1,567,595		1,597,053
Non-construction	5,792		—		16,101		53,064		8,567,068		8,642,025
Home equity	1,190		—		116		1,118		334,592		337,016
Residential real estate, excluding early buy-out loans	11,333		104		74		19,183		2,278,699		2,309,393
Premium finance receivables
Property and casualty insurance loans	18,543		9,215		14,287		32,545		5,664,290		5,738,880
Life insurance loans	—		1,066		21,552		52,975		8,050,209		8,125,802
Consumer and other	6		87		10		379		41,683		42,165
Total loans, net of unearned income, excluding early buy-out loans	$	90,218	$	10,472	$	67,333	$	274,473	$	38,926,823	$	39,369,319
Early buy-out loans guaranteed by U.S. government agencies (1)	29,245		36,920		—		1,485		128,502		196,152
Total loans, net of unearned income	$	119,463	$	47,392	$	67,333	$	275,958	$	39,055,325	$	39,565,471

(1)Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

Credit Quality Indicators

Credit quality indicators, specifically the Company's internal risk rating systems, reflect how the Company monitors credit losses and represents factors used by the Company when measuring the allowance for credit losses. Descriptions of the Company’s credit quality indicators by financial asset are included in Note (5) “Allowance for Credit Losses” of the 2023 Form 10-K.

The table below shows the Company’s loan portfolio by credit quality indicator and year of origination at March 31, 2024:

	Year of Origination														Revolving		Total
(In thousands)	2024		2023		2022		2021		2020		Prior		Revolving		to Term		Loans
Loan Balances:
Commercial, industrial and other
Pass	$	970,127	$	2,650,822	$	1,998,311	$	1,433,144	$	590,652	$	1,200,791	$	3,979,064	$	5,677	$	12,828,588
Special mention	1,783		27,372		69,729		86,335		7,175		53,800		145,717		510		392,421
Substandard accrual	197		27,876		47,624		34,005		14,725		11,845		114,410		50		250,732
Substandard nonaccrual/doubtful	—		12,562		4,653		5,326		1,720		6,734		745		—		31,740
Total commercial, industrial and other	$	972,107	$	2,718,632	$	2,120,317	$	1,558,810	$	614,272	$	1,273,170	$	4,239,936	$	6,237	$	13,503,481
Construction and development
Pass	$	26,328	$	408,651	$	927,437	$	369,191	$	105,155	$	166,162	$	23,710	$	—	$	2,026,634
Special mention	—		417		—		17,091		—		15,143		—		—		32,651
Substandard accrual	—		—		2,495		35,215		2,480		49,212		—		—		89,402
Substandard nonaccrual/doubtful	—		499		—		—		—		1,128		—		—		1,627
Total construction and development	$	26,328	$	409,567	$	929,932	$	421,497	$	107,635	$	231,645	$	23,710	$	—	$	2,150,314
Non-construction
Pass	$	298,943	$	1,516,282	$	1,817,069	$	1,370,179	$	961,542	$	3,011,760	$	189,165	$	6,915	$	9,171,855
Special mention	—		10,190		34,072		46,822		22,865		52,411		—		—		166,360
Substandard accrual	—		1,174		2,480		1,972		19,098		82,549		—		—		107,273
Substandard nonaccrual/doubtful	—		883		453		192		—		36,107		—		—		37,635
Total non-construction	$	298,943	$	1,528,529	$	1,854,074	$	1,419,165	$	1,003,505	$	3,182,827	$	189,165	$	6,915	$	9,483,123
Home equity
Pass	$	—	$	—	$	—	$	—	$	—	$	9,518	$	314,674	$	1,271	$	325,463
Special mention	—		—		223		62		—		1,992		4,076		—		6,353
Substandard accrual	—		—		291		—		45		6,265		995		99		7,695
Substandard nonaccrual/doubtful	—		—		180		69		108		391		—		90		838
Total home equity	$	—	$	—	$	694	$	131	$	153	$	18,166	$	319,745	$	1,460	$	340,349
Residential real estate
Early buy-out loans guaranteed by U.S. government agencies	$	—	$	2,621	$	4,612	$	3,919	$	7,149	$	125,049	$	—	$	—	$	143,350
Pass	148,886		476,710		828,606		767,141		212,312		270,800		—		—		2,704,455

15

Special mention	—		1,842		3,945		2,610		1,310		5,191		—		—		14,898
Substandard accrual	64		908		2,157		490		1,023		5,020		—		—		9,662
Substandard nonaccrual/doubtful	—		98		4,474		4,553		798		7,978		—		—		17,901
Total residential real estate	$	148,950	$	482,179	$	843,794	$	778,713	$	222,592	$	414,038	$	—	$	—	$	2,890,266
Premium finance receivables - property and casualty
Pass	$	3,462,480	$	3,350,889	$	—	$	10,835	$	1,043	$	—	$	—	$	—	$	6,825,247
Special mention	23,586		53,219		121		44		—		—		—		—		76,970
Substandard accrual	598		4,460		92		4		—		—		—		—		5,154
Substandard nonaccrual/doubtful	451		31,397		753		45		2		—		—		—		32,648
Total premium finance receivables - property and casualty	$	3,487,115	$	3,439,965	$	966	$	10,928	$	1,045	$	—	$	—	$	—	$	6,940,019
Premium finance receivables - life
Pass	$	997,609	$	6,871,203	$	3,221	$	—	$	—	$	—	$	—	$	—	$	7,872,033
Special mention	—		—		—		—		—		—		—		—		—
Substandard accrual	—		—		—		—		—		—		—		—		—
Substandard nonaccrual/doubtful	—		—		—		—		—		—		—		—		—
Total premium finance receivables - life	$	997,609	$	6,871,203	$	3,221	$	—	$	—	$	—	$	—	$	—	$	7,872,033
Consumer and other
Pass	$	610	$	3,092	$	935	$	760	$	73	$	3,670	$	41,790	$	—	$	50,930
Special mention	—		8		14		7		—		77		1		—		107
Substandard accrual	—		14		13		—		—		29		9		—		65
Substandard nonaccrual/doubtful	—		7		9		3		—		—		—		—		19
Total consumer and other	$	610	$	3,121	$	971	$	770	$	73	$	3,776	$	41,800	$	—	$	51,121
Total loans
Early buy-out loans guaranteed by U.S. government agencies	$	—	$	2,621	$	4,612	$	3,919	$	7,149	$	125,049	$	—	$	—	$	143,350
Pass	5,904,983		15,277,649		5,575,579		3,951,250		1,870,777		4,662,701		4,548,403		13,863		41,805,205
Special mention	25,369		93,048		108,104		152,971		31,350		128,614		149,794		510		689,760
Substandard accrual	859		34,432		55,152		71,686		37,371		154,920		115,414		149		469,983
Substandard nonaccrual/doubtful	451		45,446		10,522		10,188		2,628		52,338		745		90		122,408
Total loans	$	5,931,662	$	15,453,196	$	5,753,969	$	4,190,014	$	1,949,275	$	5,123,622	$	4,814,356	$	14,612	$	43,230,706
Gross write offs
Three months ended March 31, 2024	99		13,085		2,129		660		1,965		5,903		—		—		23,841

Held-to-maturity debt securities

The Company conducts an assessment of its investment securities, including those classified as held-to-maturity, at the time of purchase and on at least an annual basis to ensure such investment securities remain within appropriate levels of risk and continue to perform satisfactorily in fulfilling its obligations. The Company considers, among other factors, the nature of the securities and credit ratings or financial condition of the issuer. If available, the Company obtains a credit rating for issuers from a Nationally Recognized Statistical Rating Organization (“NRSRO”) for consideration. If no such rating is available for an issuer, the Company performs an internal rating based on the scale utilized within the loan portfolio as discussed above. For purposes of the table below, the Company has converted any issuer rating from an NRSRO into the Company’s internal ratings based on Investment Policy and review by the Company’s management.

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As of March 31, 2024	Year of Origination												Total
(In thousands)	2024		2023		2022		2021		2020		Prior		Balance
Amortized Cost Balances:
U.S. government agencies
1-4 internal grade	$	—	$	—	$	156,875	$	147,813	$	25,000	$	6,775	$	336,463
5-7 internal grade													—
8-10 internal grade													—
Total U.S. government agencies	$	—	$	—	$	156,875	$	147,813	$	25,000	$	6,775	$	336,463
Municipal
1-4 internal grade	$	—	$	4,176	$	1,037	$	6,886	$	258	$	156,133	$	168,490
5-7 internal grade													—
8-10 internal grade													—
Total municipal	$	—	$	4,176	$	1,037	$	6,886	$	258	$	156,133	$	168,490
Mortgage-backed securities
1-4 internal grade	$	—	$	372,240	$	566,684	$	2,309,095	$	—	$	—	$	3,248,019
5-7 internal grade													—
8-10 internal grade													—
Total mortgage-backed securities	$	—	$	372,240	$	566,684	$	2,309,095	$	—	$	—	$	3,248,019
Corporate notes
1-4 internal grade	$	—	$	—	$	14,967	$	—	$	6,006	$	36,399	$	57,372
5-7 internal grade													—
8-10 internal grade													—
Total corporate notes	$	—	$	—	$	14,967	$	—	$	6,006	$	36,399	$	57,372
Total held-to-maturity securities													$	3,810,344
Less: Allowance for credit losses													(329)
Held-to-maturity securities, net of allowance for credit losses													$	3,810,015

Measurement of Allowance for Credit Losses

The Company's allowance for credit losses consists of the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity debt security losses. In accordance with ASC 326, the Company measures the allowance for credit losses at the time of origination or purchase of a financial asset, representing an estimate of lifetime expected credit losses on the related asset. When developing its estimate, the Company considers available information relevant to assessing the collectability of cash flows, from both internal and external sources. Historical credit loss experience is one input in the estimation process as well as inputs relevant to current conditions and reasonable and supportable forecasts. In considering past events, the Company considers the relevance, or lack thereof, of historical information due to changes in such things as financial asset underwriting or collection practices, and changes in portfolio mix due to changing business plans and strategies. In considering current conditions and forecasts, the Company considers both the current economic environment and the forecasted direction of the economic environment with emphasis on those factors deemed relevant to or driving changes in expected credit losses. As significant judgment is required, the review of the appropriateness of the allowance for credit losses is performed quarterly by various committees with participation by the Company's executive management.

	March 31,		December 31,		March 31,
(In thousands)	2024		2023		2023
Allowance for loan losses	$	348,612	$	344,235	$	287,972
Allowance for unfunded lending-related commitments losses	78,563		83,030		87,826
Allowance for loan losses and unfunded lending-related commitments losses	427,175		427,265		375,798
Allowance for held-to-maturity securities losses	329		347		463
Allowance for credit losses	$	427,504	$	427,612	$	376,261

The allowance for credit losses is measured on a collective or pooled basis when similar risk characteristics exist, based upon the segmentation discussed above. The Company utilizes modeling methodologies that estimate lifetime credit loss rates on each pool, including methodologies estimating the probability of default and loss given default on specific segments. Historical credit loss history is adjusted for reasonable and supportable forecasts developed by the Company on a quantitative or qualitative basis and incorporates third party economic forecasts. Reasonable and supportable forecasts consider the macroeconomic factors that are most relevant to evaluating and predicting expected credit losses in the Company's financial assets. Currently, the Company utilizes an eight quarter forecast period using a single macroeconomic scenario provided by a

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third party and reviewed within the Company's governance structure. For periods beyond the ability to develop reasonable and supportable forecasts, the Company reverts to historical loss rates at an input level, straight-line over a four quarter reversion period. Expected credit losses are measured over the contractual term of the financial asset with consideration of expected prepayments. Expected extensions, renewals or modifications of the financial asset are considered when the expected extension, renewal or modification is contained within the existing agreement and is not unconditionally cancelable. The methodologies discussed above are applied to both current asset balances on the Company's Consolidated Statements of Condition and off-balance sheet commitments (i.e. unfunded lending-related commitments).

Assets that do not share similar risk characteristics with a pool are assessed for the allowance for credit losses on an individual basis. These typically include assets experiencing financial difficulties, including assets rated as substandard nonaccrual and doubtful. If foreclosure is probable or the asset is considered collateral-dependent, expected credit losses are measured based upon the fair value of the underlying collateral adjusted for selling costs, if appropriate. Underlying collateral across the Company's segments consist primarily of real estate, land and construction assets as well as general business assets of the borrower. As of March 31, 2024, excluding loans carried at fair value, substandard nonaccrual loans totaling $52.8 million in carrying balance had no related allowance for credit losses.

The Company does not measure an allowance for credit losses on accrued interest receivable balances because these balances are written off in a timely manner as a reduction to interest income when assets are placed on nonaccrual status.

Loan portfolios

A summary of activity in the allowance for credit losses, specifically for the loan portfolio (i.e. allowance for loan losses and allowance for unfunded commitment losses), for the three months ended March 31, 2024 and March 31, 2023 is as follows:

Three months ended March 31, 2024			Commercial Real Estate		Home  Equity		Residential Real Estate		Premium Finance Receivables		Consumer and Other		Total Loans
(In thousands)	Commercial
Allowance for credit losses at beginning of period	$	169,604	$	223,853	$	7,116	$	13,133	$	13,069	$	490	$	427,265
Other adjustments	—		—		—		—		(31)		—		(31)
Charge-offs	(11,215)		(5,469)		(74)		(38)		(6,938)		(107)		(23,841)
Recoveries	479		31		29		2		1,527		23		2,091
Provision for credit losses	7,650		7,637		120		604		5,703		(23)		21,691
Allowance for credit losses at period end	$	166,518	$	226,052	$	7,191	$	13,701	$	13,330	$	383	$	427,175
By measurement method:
Individually measured	$	13,989	$	1,784	$	—	$	59	$	—	$	9	$	15,841
Collectively measured	152,529		224,268		7,191		13,642		13,330		374		411,334
Loans at period end
Individually measured	$	31,740	$	39,262	$	838	$	17,509	$	—	$	19	$	89,368
Collectively measured	13,471,741		11,594,175		339,511		2,728,392		14,812,052		51,102		42,996,973
Loans held at fair value	—		—		—		144,365		—		—		144,365

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Three months ended March 31, 2023	Commercial		Commercial Real Estate		Home  Equity		Residential Real Estate		Premium Finance Receivables		Consumer and Other		Total Loans
(In thousands)
Allowance for credit losses at beginning of period	$	142,769	$	184,352	$	7,573	$	11,585	$	10,671	$	498	$	357,448
Cumulative effect adjustment from the adoption of ASU 2022-02 (TDR), net of tax	111		1,356		(33)		(692)		—		(1)		741
Other adjustments	—		—		—		—		4		—		4
Charge-offs	(2,543)		(5)		—		—		(4,650)		(153)		(7,351)
Recoveries	392		100		35		4		1,323		32		1,886
Provision for credit losses	8,772		8,977		153		537		4,607		24		23,070
Allowance for credit losses at period end	$	149,501	$	194,780	$	7,728	$	11,434	$	11,955	$	400	$	375,798
By measurement method:
Individually measured	$	11,281	$	1,621	$	—	$	—	$	—	$	1	$	12,903
Collectively measured	138,220		193,159		7,728		11,434		11,955		399		362,895
Loans at period end
Individually measured	$	47,950	$	11,196	$	1,190	$	11,280	$	—	$	6	$	71,622
Collectively measured	12,529,035		10,227,882		335,826		2,286,733		13,864,682		42,159		39,286,317
Loans held at fair value	—		—		—		207,532		—		—		207,532

For the three months ended March 31, 2024 and March 31, 2023, the Company recognized approximately $21.7 million and $23.1 million of provision for credit losses, respectively, related to loans and lending agreements. The provision for each period was primarily the result of loan growth as well as the Company’s macroeconomic forecasts of key model inputs, most notably, Baa corporate credit spreads and the Commercial Real Estate Pricing Index (“CREPI”). Uncertainties remain regarding expected economic performance and macroeconomic forecasts utilized in the measurement of the allowance for credit losses as of March 31, 2024. Another key driver of provision for credit losses in these portfolios was loan risk rating migration. Net charge-offs in the three month periods ending March 31, 2024 and March 31, 2023, totaled $21.8 million and $5.5 million, respectively.

Held-to-maturity debt securities

The allowance for credit losses on the Company’s held-to-maturity debt securities is presented as a reduction to the amortized cost basis of held-to-maturity securities on the Company's Consolidated Statements of Condition. For the three month period ended March 31, 2024 and 2023, the Company recognized approximately $(18,000) and $(25,000), respectively, of provision for credit losses related to held-to-maturity securities. At March 31, 2024 and March 31, 2023, the Company did not identify any held-to-maturity debt securities within its portfolio that would require a charge-off.

Loan Modifications to Borrowers Experiencing Financial Difficulties

The Company’s approach to restructuring or modifying loans is built on its credit risk rating system, which requires credit management personnel to assign a credit risk rating to each loan. In each case, the loan officer is responsible for recommending a credit risk rating for each loan and ensuring the credit risk ratings are appropriate. These credit risk ratings are then reviewed and approved by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors, including a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. The Company’s credit risk rating scale is one through ten with higher scores indicating higher risk. In the case of loans rated six or worse following modification, the Company’s Managed Assets Division evaluates the loan and the credit risk rating and determines that the loan has been restructured to be reasonably assured of repayment and of performance according to the modified terms and is supported by a current, well-documented credit assessment of the borrower’s financial condition and prospects for repayment under the revised terms. Based on the Company’s credit risk rating system, it considers that borrowers whose credit risk rating is 5 or better are not experiencing financial difficulties.

Restructurings may arise when, due to financial difficulties experienced by the borrower, the Company obtains through physical possession one or more collateral assets in satisfaction of all or part of an existing credit. Once possession is obtained, the Company reclassifies the appropriate portion of the remaining balance of the credit from loans to other real estate owned (“OREO”), which is included within other assets in the Consolidated Statements of Condition. For any residential real estate property collateralizing a consumer mortgage loan, the Company is considered to possess the related collateral only if legal title is obtained upon completion of foreclosure, or the borrower conveys all interest in the residential real estate property to the Company through completion of a deed in lieu of foreclosure or similar legal agreement. At March 31, 2024, the Company had $1,146,000 of foreclosed residential real estate properties included within OREO. Further, the recorded investment in

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residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $49.6 million and $53.4 million at March 31, 2024 and 2023, respectively.

The tables below presents a summary of the period-end balance of loans to borrowers experiencing financial difficulties during the three months ended March 31, 2024 and 2023:

Three months ended March 31, 2024  (Dollars in thousands)	Total		Percentage of Total Class of Loan		Extension of Term		Reduction of  Interest Rate		Delay in Contractual Payments		Extension of Term and Reduction of Interest Rate
Commercial
Commercial, industrial and other	$	1,629	0.0	%	$	1,502	$	—	$	—	$	127
Commercial real estate
Non-construction	1,176		0.0		293		—		883		—
Home equity	98		0.0		98		—		—		—
Residential real estate	218		0.0		35		183		—		—
Premium finance receivables
Property and casualty insurance loans	1		0.0		1		—		—		—
Total loans	$	3,122	0.0	%	$	1,929	$	183	$	883	$	127

			Weighted average magnitude of modifications:
Three months ended March 31, 2024  (Dollars in thousands)	Total		Duration of Extension of Term (months)	Reduction of  Interest Rate (bps)	Duration of Delay in Contractual Payments (months)
Commercial
Commercial, industrial and other	$	1,629	10	219	—
Commercial real estate
Non-construction	1,176		47	—	16
Home equity	98		12	—	—
Residential real estate	218		37	201	—
Premium finance receivables
Property and casualty insurance loans	1		0	—	—
Total loans	$	3,122	16	215	16

Three Months Ended March 31, 2023 (Dollars in thousands)	Total		Percentage of Total Class of Loan		Extension of Term		Reduction of  Interest Rate		Delay in Contractual Payments		Extension of Term and Reduction of Interest Rate
Commercial
Commercial, industrial and other	$	37,474	0.3	%	$	1,938	$	221	$	35,265	$	50
Commercial real estate
Non-construction	1,333		0.0		467		827		39		—
Home equity	203		0.1		203		—		—		—
Residential real estate	1,708		0.1		1,253		271		—		184
Premium finance receivables
Property and casualty insurance loans	11		0.0		3		—		—		8
Total loans	$	40,729	0.1	%	$	3,864	$	1,319	$	35,304	$	242

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			Weighted average magnitude of modifications:
Three months ended March 31, 2023 (Dollars in thousands)	Total		Duration of Extension of Term (months)	Reduction of  Interest Rate (bps)	Duration of Delay in Contractual Payments (months)
Commercial
Commercial, industrial and other	$	37,474	10	52	16
Commercial real estate
Non-construction	1,333		51	342	101
Home equity	203		12	—	—
Residential real estate	1,708		45	290	—
Premium finance receivables
Property and casualty insurance loans	11		0	50	—
Total loans	$	40,729	27	275	17

The Company had commitments of $4.2 million and $32.2 million as of March 31,2024 and March 31, 2023, respectively, to lend additional funds to borrowings experiencing financial difficulty and for whom the Company has modified the terms of loans in the form of principal forgiveness, an interest rate reduction, an other-than insignificant payment delay or a term extension during the periods presented.

The following table presents a summary of all modified loans for borrowers experiencing financial difficulties and such loans that were in payment default under the restructured terms during the respective periods below.

(Dollars in thousands)	For the Twelve Months Ended March 31, 2024		Three Months Ended March 31, 2024		For the Three Months Ended March 31, 2023		Three Months Ended March 31, 2023
	Total		Payments in Default  (1)		Total		Payments in Default  (1)
Commercial
Commercial, industrial and other	$	16,011	$	244	$	37,474	$	2
Commercial real estate
Construction and development	2,495		—		—		—
Non-construction	6,161		603		1,333		828
Home equity	616		19		203		104
Residential real estate	612		144		1,708		—
Premium finance receivables
Property and casualty insurance loans	81		—		11		11
Total loans	$	25,976	$	1,010	$	40,729	$	945

(1)Modified loans considered to be in payment default are over 30 days past due subsequent to the restructuring.

(8) Goodwill and Other Acquisition-Related Intangible Assets

A summary of the Company’s goodwill assets by reporting unit is presented in the following table:

(In thousands)	December 31, 2023		Goodwill Acquired		Impairment Loss		Goodwill Adjustments		March 31, 2024
Community banking	$	545,671	$	—	$	—	$	—	$	545,671
Specialty finance	39,006		—		—		(491)		38,515
Wealth management	71,995		—		—		—		71,995
Total	$	656,672	$	—	$	—	$	(491)	$	656,181

The specialty finance unit’s goodwill decreased $491,000 in the first three months of 2024 as a result of foreign currency translation adjustments related to the Canadian acquisitions.

The Company assesses each reporting unit’s goodwill for impairment on at least an annual basis and considers potential indicators of impairment at each reporting date between annual goodwill impairment tests. At October 1, 2023, the Company utilized a qualitative approach for its annual goodwill impairment tests of the community banking, specialty finance and wealth management reporting units and determined that it was more likely than not that the fair value of all reporting units exceeded the respective carrying value of such reporting unit at that time.

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At each reporting date between annual goodwill impairment tests, the Company considers potential indicators of impairment. The Company assessed whether events and circumstances resulted in it being more likely than not that the fair value of any reporting unit was less than its carrying value. Potential impairment indicators considered include the condition of the economy and banking industry; government intervention and regulatory updates; the impact of recent events to financial performance and cost factors of the reporting units; performance of the Company’s stock and other relevant events.

At the conclusion of this assessment of all reporting units, the Company determined that as of March 31, 2024, it was more likely than not that the fair value of all reporting units exceeded the respective carrying value of such reporting unit.

A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of March 31, 2024 is as follows:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	55,206	$	55,206	$	55,206
Accumulated amortization	(46,899)		(46,125)		(43,473)
Net carrying amount	$	8,307	$	9,081	$	11,733
Trademark with indefinite lives:
Carrying amount	5,800		5,800		5,800
Total net carrying amount	$	14,107	$	14,881	$	17,533
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,962	$	1,963	$	1,962
Accumulated amortization	(1,849)		(1,837)		(1,799)
Net carrying amount	$	113	$	126	$	163
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	26,630	$	26,630	$	20,430
Accumulated amortization	(19,120)		(18,748)		(17,175)
Net carrying amount	$	7,510	$	7,882	$	3,255
Total acquisition-related intangible assets:
Gross carrying amount	$	89,598	$	89,599	$	83,398
Accumulated amortization	(67,868)		(66,710)		(62,447)
Total other acquisition-related intangible assets, net	$	21,730	$	22,889	$	20,951

Estimated amortization
Actual in three months ended March 31, 2024	$	1,158
Estimated remaining in 2024	3,143
Estimated—2025	3,482
Estimated—2026	2,772
Estimated—2027	2,156
Estimated—2028	1,591

The core deposit intangibles recognized in connection with prior bank acquisitions are amortized over a ten-year period on an accelerated basis. The customer list intangibles recognized in connection with the purchase of life insurance premium finance assets in 2009 are being amortized over an 18-year period on an accelerated basis. The customer list and other intangibles recognized in connection with prior acquisitions within the wealth management segment are being amortized over a period of up to ten years on a straight-line basis. The increase in wealth management segment customer list and other intangibles as compared to March 31, 2023 relates to the acquisition in the second quarter 2023 which is being amortized over a period of ten years on an accelerated basis. Indefinite-lived intangible assets consist of certain trade and domain names recognized in connection with the acquisition of certain assets of Veterans First Mortgage in 2018. As indefinite-lived intangible assets are not amortized, the Company assesses impairment on at least an annual basis.

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Total amortization expense associated with finite-lived acquisition-related intangibles totaled approximately $1.2 million for the three months ended March 31, 2024 and 2023.

(9) Mortgage Servicing Rights (“MSRs”)

The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated:

	Three Months Ended
	March 31,		March 31,
(In thousands)	2024		2023
Fair value at beginning of the period	$	192,456	230,225
Additions from loans sold with servicing retained	5,379		5,107
Estimate of changes in fair value due to:
Payoffs, paydowns and repurchases	(4,386)		(3,909)
Changes in valuation inputs or assumptions	7,595		(6,953)
Fair value at end of the period	$	201,044	$	224,470
Unpaid principal balance of mortgage loans serviced for others	$	12,051,392	$	14,080,461

The Company recognizes MSR assets upon the sale of residential real estate loans to external third parties when it retains the obligation to service the loans and the servicing fee is more than adequate compensation. MSRs are included in other assets in the Consolidated Statements of Condition. The initial recognition of MSR assets from loans sold with servicing retained and subsequent changes in fair value of all MSRs are recognized in mortgage banking revenue. MSRs are subject to changes in value from actual and expected prepayment of the underlying loans.

The estimation of fair value related to MSRs is partly impacted by the Company exercising its early buyout options (“EBO”) on eligible loans previously sold to the Government National Mortgage Association (“GNMA”). Under such optional repurchase program, financial institutions acting as servicers are allowed to buy back from the securitized loan pool individual delinquent mortgage loans meeting certain criteria for which the institution was the original transferor of such loans. At the option of the servicer and without prior authorization from GNMA, the servicer may repurchase such delinquent loans for an amount equal to the remaining principal balance of the loan. At the time of such repurchase, any MSR value related to such loans is derecognized.

The MSR asset fair value is determined by using a discounted cash flow model that incorporates the objective characteristics of the portfolio as well as subjective valuation parameters that purchasers of servicing would apply to such portfolios sold into the secondary market. The subjective factors include loan prepayment speeds, discount rates, servicing costs and other economic factors. The Company uses a third party to assist in the valuation of MSRs.

Periodically, the Company will purchase options for the right to purchase securities not currently held within the banks’ investment portfolios or enter into interest rate swaps in which the Company elects not to designate such derivatives as hedging instruments. These option and swap transactions are designed primarily to economically hedge a portion of the fair value adjustments related to the Company’s MSRs. The gain or loss associated with these derivative contracts is included in mortgage banking revenue. For more information regarding these hedges outstanding as of March 31, 2024 and March 31, 2023, see Note (14) “Derivative Financial Instruments” in Item 1 of this report.

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(10) Deposits

The following table is a summary of deposits as of the dates shown: 

(Dollars in thousands)	March 31, 2024			December 31, 2023			March 31, 2023
Balance:
Non-interest-bearing	$	9,908,183		$	10,420,401		$	11,236,083
NOW and interest-bearing demand deposits	5,720,947			5,797,649			5,576,558
Wealth management deposits	1,347,817			1,614,499			1,809,933
Money market	15,617,717			15,149,215			13,552,277
Savings	5,959,774			5,790,334			5,192,108
Time certificates of deposit	7,894,420			6,625,072			5,351,252
Total deposits	$	46,448,858		$	45,397,170		$	42,718,211
Mix:
Non-interest-bearing	21		%	23		%	26		%
NOW and interest-bearing demand deposits	12			13			13
Wealth management deposits	3			4			4
Money market	34			33			32
Savings	13			13			12
Time certificates of deposit	17			14			13
Total deposits	100		%	100		%	100		%

Wealth management deposits represent deposit balances (primarily money market accounts) at the Company’s subsidiary banks from brokerage customers of Wintrust Investments, LLC (“Wintrust Investments”), Chicago Deferred Exchange Company (“CDEC”) and trust and asset management customers of the Company.

(11) FHLB Advances, Other Borrowings and Subordinated Notes

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
FHLB advances	$	2,676,751	$	2,326,071	$	2,316,071
Other borrowings:
Notes payable	164,153		171,282		192,666
Short-term borrowings	10,869		13,430		10,124
Secured borrowings	341,704		401,897		320,007
Other	58,682		59,204		60,751
Total other borrowings	575,408		645,813		583,548
Subordinated notes	437,965		437,866		437,493
Total FHLB advances, other borrowings and subordinated notes	$	3,690,124	$	3,409,750	$	3,337,112

Descriptions of the Company’s FHLB advances, other borrowings, and subordinated notes are included in Note (11) “Federal Home Loan Bank Advances”, Note (12) “Subordinated Notes” and Note (13) “Other Borrowings” of the 2023 Form 10-K.

Notes Payable

Notes payable balances represent the balances on the Company’s credit agreement with certain unaffiliated banks. At March 31, 2024, the outstanding principal balance under the term loan facility was $164.2 million and there was no outstanding balance under the revolving credit facility. Borrowings under notes payable are secured by pledges of and first priority perfected security interests in the Company’s equity interest in its bank subsidiaries and contain several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and other indebtedness. At March 31, 2024, the Company was in compliance with all such covenants.

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Short-term Borrowings

Short-term borrowings include securities sold under repurchase agreements of customer sweep accounts in connection with master repurchase agreement at the banks. These borrowings totaled $10.9 million at March 31, 2024 compared to $13.4 million and $10.1 million at December 31, 2023 and March 31, 2023, respectively. As of March 31, 2024, the Company had pledged securities related to its customer balances in sweep accounts of $16.6 million. Securities pledged for customer balances in sweep accounts and short-term borrowings from brokers are maintained under the Company’s control and consist of mortgage-backed securities. These securities are included in the available-for-sale portfolio as reflected on the Company’s Consolidated Statements of Condition.

The following is a summary of these securities pledged as of March 31, 2024 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(In thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	16,632
Excess collateral	5,763
Securities sold under repurchase agreements	$	10,869

Secured Borrowings

The balance of secured borrowings primarily represents a third party Canadian transaction (“Canadian Secured Borrowing”). Under the Canadian Secured Borrowing, the Company, through its subsidiary, FIFC Canada, sells an undivided co-ownership interest in all receivables owed to FIFC Canada to an unrelated third party in exchange for cash payments pursuant to a receivables purchase agreement (“Receivables Purchase Agreement”). On May 31, 2023, the Company entered into the eleventh amending agreement to the Receivables Purchase Agreement dated as of December 16, 2014. The amended Receivables Purchase Agreement provides for, among other things, an extension of the maturity date to December 15, 2024, an increase to the facility limit from $420 million to $520 million, and a fee rate increase from 0.775% to 0.825%. Additionally, since Canadian Dollar Offered Rate (“CDOR”) will cease being used in Canada in June 2024, references to CDOR changed to the Benchmark rate.

At March 31, 2024, the translated balance of the secured borrowings totaled $332.4 million compared to $392.5 million at December 31, 2023 and $310.6 million at March 31, 2023. The interest rate under the Receivables Purchase Agreement is the Canadian Commercial Paper Rate plus fee rate of 0.825%.

The remaining $9.3 million, $9.4 million and $9.4 million within secured borrowings at March 31, 2024, December 31, 2023 and March 31, 2023, respectively, represent other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties.

Other Borrowings

Other borrowings represent a fixed-rate promissory note (“Fixed-Rate Promissory Note”) issued by the Company in June 2017. Subsequent amendments to the Fixed-Rate Promissory Note since issuance increased the principal amount to $66.4 million, reduced the interest rate to 1.70% and extended the maturity date to March 31, 2025. The Fixed-Rate Promissory Note contains several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and indebtedness. At March 31, 2024, the Company was in compliance with all such covenants.

Subordinated Notes

At March 31, 2024, the Company had outstanding subordinated notes totaling $438.0 million compared to $437.9 million and $437.5 million at December 31, 2023 and March 31, 2023, respectively. In 2019, the Company issued $300.0 million of subordinated notes receiving $296.7 million in proceeds, net of underwriting discount. The notes have a stated interest rate of 4.85% and mature in June 2029. In 2014, the Company issued $140.0 million of subordinated notes receiving $139.1 million in proceeds, net of underwriting discount. The notes have a stated interest rate of 5.00% and mature in June 2024.

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(12) Junior Subordinated Debentures

The following table provides a summary of the Company’s junior subordinated debentures as of March 31, 2024. The junior subordinated debentures represent the par value of the obligations owed to the Trusts.

(Dollars in thousands)	Common Securities		Trust  Preferred Securities		Junior Subordinated Debentures		Rate Structure (1)	Contractual Rate at 3/31/2024		Issue Date	Maturity Date	Earliest Redemption Date
Wintrust Capital Trust III	$	774	$	25,000	$	25,774	S+0.26161+3.25	8.83	%	04/2003	04/2033	04/2008
Wintrust Statutory Trust IV	619		20,000		20,619		S+0.26161+2.80	8.36	%	12/2003	12/2033	12/2008
Wintrust Statutory Trust V	1,238		40,000		41,238		S+0.26161+2.60	8.16	%	05/2004	05/2034	06/2009
Wintrust Capital Trust VII	1,550		50,000		51,550		S+0.26161+1.95	7.54	%	12/2004	03/2035	03/2010
Wintrust Capital Trust VIII	1,238		25,000		26,238		S+0.26161+1.45	7.01	%	08/2005	09/2035	09/2010
Wintrust Capital Trust IX	1,547		50,000		51,547		S+0.26161+1.63	7.22	%	09/2006	09/2036	09/2011
Northview Capital Trust I	186		6,000		6,186		S+0.26161+3.00	8.57	%	08/2003	11/2033	08/2008
Town Bankshares Capital Trust I	186		6,000		6,186		S+0.26161+3.00	8.57	%	08/2003	11/2033	08/2008
First Northwest Capital Trust I	155		5,000		5,155		S+0.26161+3.00	8.56	%	05/2004	05/2034	05/2009
Suburban Illinois Capital Trust II	464		15,000		15,464		S+0.26161+1.75	7.34	%	12/2006	12/2036	12/2011
Community Financial Shares Statutory Trust II	109		3,500		3,609		S+0.26161+1.62	7.21	%	06/2007	09/2037	06/2012
Total					$	253,566		7.77	%

(1)The interest rates on the variable rate junior subordinated debentures are based on the three-month Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) and reset on a quarterly basis.

The junior subordinated debentures totaled $253.6 million at March 31, 2024, December 31, 2023 and March 31, 2023. At March 31, 2024, the weighted average contractual interest rate on the junior subordinated debentures was 7.77%.

(13) Segment Information

The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management.

The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures, and economic characteristics.

For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note (10) “Deposits” in Item 1 of this report for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment’s risk-weighted assets.

The segment financial information provided in the following table has been derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in Note (1) “Summary of Significant Accounting Policies” of the 2023 Form 10-K. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment.

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The following is a summary of certain operating information for reportable segments:

	Three Months Ended				$ Change in Contribution		% Change  in Contribution
(Dollars in thousands)	March 31, 2024		March 31, 2023
Net interest income:
Community Banking	$	363,685	$	369,848	$	(6,163)	(2)	%
Specialty Finance	82,282		70,351		11,931		17
Wealth Management	7,758		8,955		(1,197)		(13)
Total Operating Segments	453,725		449,154		4,571		1
Intersegment Eliminations	10,469		8,841		1,628		18
Consolidated net interest income	$	464,194	$	457,995	$	6,199	1	%
Provision for credit losses:
Community Banking	$	20,392	$	21,099	$	(707)	(3)	%
Specialty Finance	1,281		1,946		(665)		(34)
Wealth Management	—		—		—		—
Total Operating Segments	21,673		23,045		(1,372)		(6)
Intersegment Eliminations	—		—		—		—
Consolidated provision for credit losses	$	21,673	$	23,045	$	(1,372)	(6)	%
Non-interest income:
Community Banking	$	74,636	$	68,733	$	5,903	9	%
Specialty Finance	27,317		25,790		1,527		6
Wealth Management	58,485		30,297		28,188		93
Total Operating Segments	160,438		124,820		35,618		29
Intersegment Eliminations	(19,858)		(17,051)		(2,807)		16
Consolidated non-interest income	$	140,580	$	107,769	$	32,811	30	%
Net revenue:
Community Banking	$	438,321	$	438,581	$	(260)	0	%
Specialty Finance	109,599		96,141		13,458		14
Wealth Management	66,243		39,252		26,991		69
Total Operating Segments	614,163		573,974		40,189		7
Intersegment Eliminations	(9,389)		(8,210)		(1,179)		14
Consolidated net revenue	$	604,774	$	565,764	$	39,010	7	%
Segment profit:
Community Banking	$	120,046	$	134,232	$	(14,186)	(11)	%
Specialty Finance	42,523		36,737		5,786		16
Wealth Management	24,725		9,229		15,496		168
Consolidated net income	$	187,294	$	180,198	$	7,096	4	%
Segment assets:
Community Banking	$	45,720,014	$	41,611,980	$	4,108,034	10	%
Specialty Finance	10,713,783		9,841,044		872,739		9
Wealth Management	1,143,136		1,420,487		(277,351)		(20)
Consolidated total assets	$	57,576,933	$	52,873,511	$	4,703,422	9	%

NM - Not meaningful

(14) Derivative Financial Instruments

The Company primarily enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one party delivering cash to the other party based on a notional amount and an underlying term (such as a rate, security price or price index or commodity price) as specified in the contract. The amount of cash delivered from one party to the other is determined based on the interaction of the notional amount of the contract with the underlying term. Derivatives are also implicit in certain contracts and commitments.

The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: (1) interest rate swaps and collars to manage the interest rate risk of certain fixed and variable rate assets and variable rate liabilities; (2) interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market; (3) forward commitments for the future delivery of such mortgage loans to protect the Company from adverse changes in interest rates and corresponding changes in the value of mortgage loans held-for-sale; (4) covered call options to

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economically hedge specific investment securities and receive fee income, effectively enhancing the overall yield on such securities to compensate for net interest margin compression; and (5) options and swaps to economically hedge a portion of the fair value adjustments related to the Company’s mortgage servicing rights portfolio. The Company also enters into derivatives (typically interest rate swaps and commodity forward contracts) with certain qualified borrowers to facilitate the borrowers’ risk management strategies and concurrently enters into mirror-image derivatives with a third party counterparty, effectively making a market in the derivatives for such borrowers. Additionally, the Company enters into foreign currency contracts to manage foreign exchange risk associated with certain foreign currency denominated assets.

The Company recognizes derivative financial instruments in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. Changes in the fair value of derivative financial instruments are either recognized in income or in shareholders’ equity as a component of accumulated other comprehensive income or loss depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value hedge or cash flow hedge.

Changes in fair values of derivatives accounted for as fair value hedges are recorded in income in the same period and in the same income statement line as changes in the fair values of the hedged items that relate to the hedged risk(s). Changes in fair values of derivative financial instruments accounted for as cash flow hedges are recorded as a component of accumulated other comprehensive income or loss, net of deferred taxes, and reclassified to earnings when the hedged transaction affects earnings. Changes in fair values of derivative financial instruments not designated in a hedging relationship pursuant to ASC 815 are reported in non-interest income during the period of the change. Derivative financial instruments are valued by a third party and are corroborated by comparison with valuations provided by the respective counterparties. Fair values of certain mortgage banking derivatives (interest rate lock commitments and forward commitments to sell mortgage loans) are estimated based on changes in mortgage interest rates from the date of the loan commitment. The fair value of foreign currency derivatives is computed based on changes in foreign currency rates stated in the contract compared to those prevailing at the measurement date. Commodity derivative fair values are computed based on changes in the price per unit stated in the contract compared to those prevailing at the measurement date.

The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2024, December 31, 2023 and March 31, 2023:

	Derivative Assets						Derivative Liabilities
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Derivatives designated as hedging instruments under ASC 815:
Interest rate derivatives designated as Cash Flow Hedges	$	12,985	$	40,116	$	25,730	$	94,758	$	44,456	$	43,412
Interest rate derivatives designated as Fair Value Hedges	13,443		12,349		13,732		21		273		—
Total derivatives designated as hedging instruments under ASC 815	$	26,428	$	52,465	$	39,462	$	94,779	$	44,729	$	43,412
Derivatives not designated as hedging instruments under ASC 815:
Interest rate derivatives	$	222,505	$	211,490	$	219,869	$	223,384	$	210,397	$	219,053
Interest rate lock commitments	6,212		4,511		5,356		21		—		67
Forward commitments to sell mortgage loans	169		—		121		2,549		5,212		2,953
Commodity forward contracts	685		888		491		416		609		315
Foreign exchange contracts	3,265		6,372		8,705		3,215		6,308		8,632
Total derivatives not designated as hedging instruments under ASC 815	$	232,836	$	223,261	$	234,542	$	229,585	$	222,526	$	231,020
Total Derivatives	$	259,264	$	275,726	$	274,004	$	324,364	$	267,255	$	274,432

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to net interest income and to manage its exposure to interest rate movements. To accomplish these objectives, the Company primarily uses interest rate swaps and interest rate collars as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts to or from a counterparty in exchange for the Company receiving or paying fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate collars designated as cash flow hedges involve the settlement of amounts in which the interest rate index specified in the contract

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exceeds the agreed upon cap strike rate or in which the interest rate index specified in the contract is below the agreed upon floor strike rate at the end of each period.

As of March 31, 2024, the Company had various interest rate collar and swap derivatives designated as cash flow hedges of variable rate loans. 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 or loss and are subsequently reclassified to interest income as interest payments are made on such variable rate loans. The changes in fair value (net of tax) are separately disclosed in the Consolidated Statements of Comprehensive Income.

The table below provides details on these cash flow hedges, summarized by derivative type and maturity, as of March 31, 2024:

	March 31, 2024
	Notional		Fair Value
(In thousands)	Amount		Asset (Liability)
Interest Rate Collars at 1-month CME term SOFR:
Buy 2.250% floor, sell 3.743% cap; matures September 2025	$	1,250,000	$	(18,054)
Buy 2.750% floor, sell 4.320% cap; matures October 2026	500,000		(4,246)
Buy 2.000% floor, sell 3.450% cap; matures September 2027	1,250,000		(36,414)
Interest Rate Swaps at 1-month CME term SOFR:
Fixed 3.748%; matures December 2025	250,000		(3,420)
Fixed 3.759%; matures December 2025	250,000		(3,373)
Fixed 3.680%; matures February 2026	250,000		(3,715)
Fixed 4.176%; matures March 2026	250,000		(1,439)
Fixed 3.915%; matures March 2026	250,000		(2,643)
Fixed 4.450%; matures July 2026	250,000		410
Fixed 3.515%, matures December 2026	250,000		(4,681)
Fixed 3.512%; matures December 2026	250,000		(4,700)
Fixed 3.453%; matures February 2027	250,000		(5,086)
Fixed 4.150%; matures July 2027	250,000		199
Fixed 3.748%; matures March 2028	250,000		(2,483)
Fixed 3.526%; matures March 2028	250,000		(4,504)
Fixed 3.993%; matures October 2029	100,000		1,150
Fixed 3.993%; matures October 2029	250,000		2,876
Fixed 4.245%; matures November 2029	175,000		4,175
Fixed 4.245%; matures November 2029	175,000		4,175
Total Cash Flow Hedges	$	6,700,000	$	(81,773)

In the first quarter of 2022, the Company terminated interest rate swap derivative contracts designated as cash flow hedges of variable rate deposits with a total notional value of $1.0 billion and a five-year term effective July 2022. At the time of termination, the fair value of the derivative contracts totaled an asset of $66.5 million, with such adjustments to fair value recorded in accumulated other comprehensive income or loss. In the second quarter of 2022, the Company terminated two additional interest rate swap derivative contracts designated as cash flow hedges of variable rate deposits with a total notional value of $500.0 million each effective since April 2020. The remaining terms of such derivative contracts were through March 2023 and April 2024 and, at the time of termination, the fair value of the derivative contracts totaled assets of $3.7 million and $10.7 million, respectively, with such adjustments to fair value recorded in accumulated other comprehensive income or loss. In the fourth quarter of 2022, the Company terminated one additional interest rate collar derivative contract designated as a cash flow hedge of a term borrowing facility with a total notional value of $64.3 million effective since September 2018. The remaining term of such derivative contract was through September 2023 and, at the time of termination, the fair value of the derivative contract totaled an asset of $875,000, with such adjustments to fair value recorded in accumulated other comprehensive income or loss.

For all such terminations, as the hedged forecasted transactions (interest payments on variable rate deposits and a term borrowing facility) are still expected to occur over the remaining term of such terminated derivatives, such adjustments will remain in accumulated other comprehensive income or loss and be reclassified as a reduction to interest expense on a straight-line basis over the original term of the terminated derivative contracts.

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A rollforward of the amounts in accumulated other comprehensive income or loss related to interest rate derivatives designated as cash flow hedges, including such derivative contracts terminated during the period, follows:

	Three Months Ended
(In thousands)	March 31, 2024		March 31, 2023
Unrealized gain at beginning of period	$	43,538	$	10,026
Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings	19,818		3,747
Amount of loss recognized in other comprehensive income or loss	(101,909)		30,919
Unrealized (loss) gain at end of period	$	(38,553)	$	44,692

As of March 31, 2024, the Company estimated that during the next 12 months $56.9 million will be reclassified from accumulated other comprehensive income or loss as a decrease to net interest income. Such estimate consists of $13.3 million reclassified as a reduction to interest expense on the terminated cash flow hedges discussed above and $70.2 million reclassified as a reduction to interest income related to the interest rate collars and swaps noted above that remain outstanding.

Fair Value Hedges of Interest Rate Risk

Interest rate swaps designated as fair value hedges involve the payment of fixed amounts to a counterparty in exchange for the Company receiving variable payments over the life of the agreements without the exchange of the underlying notional amount. As of March 31, 2024, the Company had 13 interest rate swaps with an aggregate notional amount of $215.2 million that were designated as fair value hedges primarily associated with fixed rate commercial and industrial and commercial real estate loans as well as life insurance premium finance receivables.

For derivatives designated and that qualify as fair value hedges, the net gain or loss from the entire change in the fair value of the derivative instrument is recognized in the same income statement line item as the earnings effect, including the net gain or loss, of the hedged item (interest income earned on fixed rate loans) when the hedged item affects earnings.

The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of March 31, 2024:

(In thousands)		March 31, 2024
Derivatives in Fair Value Hedging Relationships	Location in the Statement of Condition	Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued
Interest rate swaps	Loans, net of unearned income	$	201,019	$	(13,487)	$	(75)
	Available-for-sale debt securities	712		(19)		—

The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective period:

(In thousands) Derivatives in Fair Value Hedging Relationships	Location of (Loss)/Gain Recognized in Income on Derivative	Three Months Ended
		March 31, 2024
Interest rate swaps	Interest and fees on loans	$	10
	Interest income - investment securities	—

Non-Designated Hedges

The Company does not use derivatives for speculative purposes. Derivatives not designated as accounting hedges are used to manage the Company’s economic exposure to interest rate movements and other identified risks but do not meet the strict

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hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings.

Interest Rate Derivatives—Periodically, the Company may purchase interest rate cap derivatives designed to act as an economic hedge of the risk of the negative impact on its fixed-rate loan portfolios from rising interest rates. As of March 31, 2024, there were no interest rate caps outstanding that were designed to act as an economic hedge.

Additionally, the Company has interest rate derivatives, including swaps and option products, resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products (typically interest rate swaps) directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively convert a variable rate loan to a fixed rate. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At March 31, 2024 and December 31, 2023, the Company had interest rate derivative transactions with an aggregate notional amount of approximately $11.6 billion and $11.4 billion, respectively, (all interest rate swaps and caps with customers and third parties) related to this program. At March 31, 2024 these interest rate derivatives had maturity dates ranging from April 2024 to January 2037.

Mortgage Banking Derivatives—These derivatives include interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market and forward commitments for the future delivery of such loans. It is the Company’s practice to enter into forward commitments for the future delivery of a portion of its residential mortgage loan production when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held-for-sale. The Company’s mortgage banking derivatives have not been designated as being in hedge relationships. At March 31, 2024 and December 31, 2023, the Company had interest rate lock commitments with an aggregate notional amount of approximately $226.4 million and $129.9 million, and forward commitments to sell mortgage loans with an aggregate notional amount of approximately $561.6 million and $626.9 million, respectively. The fair values of these derivatives were estimated based on changes in mortgage rates from the dates of the commitments. Changes in the fair value of these mortgage banking derivatives are included in mortgage banking revenue.

Commodity Derivatives—The Company has commodity forward contracts resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively purchase or sell a given commodity at an agreed-upon price on an agreed-upon settlement date. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At March 31, 2024 and December 31, 2023, the Company had commodity derivative transactions with an aggregate notional amount of approximately $8.7 million and $8.4 million, respectively, (all forward contracts with customers and third parties) related to this program. At March 31, 2024, these commodity derivatives had maturity dates ranging from April 2024 to March 2025.

Foreign Currency Derivatives—The Company has foreign currency derivative contracts resulting from a service the Company provides to certain qualified customers. The Company’s banking subsidiaries execute certain derivative products directly with qualified customers to facilitate their respective risk management strategies related to foreign currency fluctuations. For example, these arrangements allow the Company’s customers to effectively exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. As of March 31, 2024 and December 31, 2023, the Company held foreign currency derivatives with an aggregate notional amount of approximately $107.1 million and $144.3 million, respectively.

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Other Derivatives—Periodically, the Company will sell options to a bank or dealer for the right to purchase certain securities held within the banks’ investment portfolios (covered call options). These option transactions are designed to increase the total return associated with the investment securities portfolio. These options do not qualify as accounting hedges pursuant to ASC 815 and, accordingly, changes in the fair value of these contracts are recognized as other non-interest income. There were no covered call options outstanding as of March 31, 2024, December 31, 2023 or March 31, 2023.

Periodically, the Company will purchase options for the right to purchase securities not currently held within the banks’ investment portfolios or enter into interest rate swaps in which the Company elects to not designate such derivatives as hedging instruments. These option and swap transactions are designed primarily to economically hedge a portion of the fair value adjustments related to the Company's mortgage servicing rights portfolio. The gain or loss associated with these derivative contracts are included in mortgage banking revenue. The Company held five interest rate derivatives with an aggregate notional value of $145.0 million at March 31, 2024 and four interest rate derivatives with an aggregate notional value of and $195.0 million at December 31, 2023, for such purpose of economically hedging a portion of the fair value adjustment related to its mortgage servicing rights portfolio.

Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows:

(In thousands)		Three Months Ended
Derivative	Location in income statement	March 31, 2024		March 31, 2023
Interest rate swaps and caps	Trading gains, net	$	595	$	800
Mortgage banking derivatives	Mortgage banking revenue	(15)		3,640
Commodity contracts	Trading gains, net	268		177
Foreign exchange contracts	Trading gains, net	8		—
Covered call options	Fees from covered call options	4,847		10,391
Derivative contract held as economic hedge on MSRs	Mortgage banking revenue	(2,577)		946

Credit Risk

Derivative instruments have inherent risks, primarily market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the risk that the counterparty will fail to perform according to the terms of the agreement. The amounts potentially subject to market and credit risks are the streams of interest payments under the contracts and the market value of the derivative instrument and not the notional principal amounts used to express the volume of the transactions. Market and credit risks are managed and monitored as part of the Company’s overall asset-liability management process, except that the credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company’s standard loan underwriting process since these derivatives are secured through collateral provided by the loan agreements. Actual exposures are monitored against various types of credit limits established to contain risk within parameters. When deemed necessary, appropriate types and amounts of collateral are obtained to minimize credit exposure.

The Company has agreements with certain of its interest rate derivative counterparties that contain cross-default provisions, which provide that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision allowing the counterparty to terminate the derivative positions if the Company fails to maintain its status as a well or adequately capitalized institution, which would require the Company to settle its obligations under the agreements. As of March 31, 2024, there were no interest rate derivatives in a net liability position that were subject to such agreements. The fair value of such derivatives includes accrued interest related to these agreements. If the Company had breached any of these provisions and those derivatives subject to such agreements were in a liability position, and the derivatives were terminated as a result, the Company would have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

The Company is also exposed to the credit risk of its commercial borrowers who are counterparties to interest rate derivatives with the banks. This counterparty risk related to the commercial borrowers is managed and monitored through the banks’ standard underwriting process applicable to loans since these derivatives are secured through collateral provided by the loan agreement. The counterparty risk associated with the mirror-image swaps executed with third parties is monitored and managed in connection with the Company’s overall asset liability management process.

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The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative assets and liabilities on the Consolidated Statements of Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets						Derivative Liabilities
	Fair Value						Fair Value
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Gross Amounts Recognized	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Less: Amounts offset in the Statements of Condition	—		—		—		—		—		—
Net amount presented in the Statements of Condition	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Gross amounts not offset in the Statements of Condition
Offsetting Derivative Positions	(109,977)		(76,514)		(55,838)		(109,977)		(76,514)		(55,838)
Collateral Posted	(119,572)		(144,899)		(181,884)		—		—		—
Net Credit Exposure	$	19,384	$	42,542	$	21,609	$	208,186	$	178,612	$	206,627

(15) Fair Values of Assets and Liabilities

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the inputs used to determine fair value. These levels are:

•Level 1—unadjusted quoted prices in active markets for identical assets or liabilities.

•Level 2—inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•Level 3—significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

A financial instrument’s categorization within the above valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the assets or liabilities. The following is a description of the valuation methodologies used for the Company’s assets and liabilities measured at fair value on a recurring basis.

Available-for-sale debt securities, trading account securities and equity securities with readily determinable fair value—Fair values for available-for-sale debt securities, trading account securities and equity securities with readily determinable fair value are typically based on prices obtained from independent pricing vendors. Securities measured with these valuation techniques are generally classified as Level 2 of the fair value hierarchy. Typically, standard inputs such as benchmark yields, reported trades for similar securities, issuer spreads, benchmark securities, bids, offers and reference data including market research publications are used to determine the fair value of these securities. When these inputs are not available, broker/dealer quotes may be obtained by the vendor to determine the fair value of the security. We review the vendor’s pricing methodologies to determine if observable market information is being used, versus unobservable inputs. Fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy. The fair value of U.S. Treasury securities and certain equity securities with readily determinable fair value are based on unadjusted quoted prices in active markets for identical securities. As such, these securities are classified as Level 1 in the fair value hierarchy.

The Company’s Investment Operations Department is responsible for the valuation of Level 3 available-for-sale debt securities. The methodology and variables used as inputs in pricing Level 3 securities are derived from a combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments.

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At March 31, 2024, the Company classified $88.2 million of municipal securities as Level 3. These municipal securities are bond issues for various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and are privately placed, non-rated bonds without CUSIP numbers. The Company’s methodology for pricing these securities focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated investment debt security, the Investment Operations Department references a rated, publicly issued bond by the same issuer if available. A reduction is then applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one complete rating grade (i.e. a “AA” rating for a comparable bond would be reduced to “A” for the Company’s valuation). For bond issues without comparable bond proxies, a rating of “BBB” was assigned. In the first quarter of 2024, all of the ratings derived by the Investment Operations Department using the above process were “BBB” or better. The fair value measurement noted above is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined in the above process, Investment Operations obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Certain municipal bonds held by the Company at March 31, 2024 are continuously callable. When valuing these bonds, the fair value is capped at par value as the Company assumes a market participant would not pay more than par for a continuously callable bond.

Mortgage loans held-for-sale—The fair value of mortgage loans held-for-sale is typically determined by reference to investor price sheets for loan products with similar characteristics. Loans measured with this valuation technique are classified as Level 2 in the fair value hierarchy.

At March 31, 2024, the Company classified $33.7 million of certain delinquent mortgage loans held-for-sale as Level 3. For such delinquent loans in which investor interest may be limited, the Company estimates fair value by discounting future scheduled cash flows for the specific loan through its life, adjusted for estimated credit losses. The Company uses a discount rate based on prevailing market coupon rates on loans with similar characteristics. The assumed weighted average discount rate used as an input to value these loans at March 31, 2024 was 6.60%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. Additionally, the weighted average credit discount used as an input to value the specific loans was 0.43% with credit loss discount ranging from 0%-12% at March 31, 2024.

Loans held-for-investment—The fair value for certain loans in which the Company previously elected the fair value option is estimated by discounting future scheduled cash flows for the specific loan through maturity, adjusted for estimated credit losses and prepayment or life assumptions. These loans primarily consist of early buyout loans guaranteed by U.S. government agencies that are delinquent and, as a result, investor interest may be limited. The Company uses a discount rate based on the actual coupon rate of the underlying loan. At March 31, 2024, the Company classified $49.3 million of loans held-for-investment carried at fair value as Level 3. The assumed weighted average discount rate used as an input to value these loans at March 31, 2024 was 6.60%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. As noted above, the fair value estimate also includes assumptions of prepayment speeds and average life as well as credit losses. The weighted average prepayments speed used as an input to value current loans was 7.78% at March 31, 2024. Prepayment speeds are inversely related to the fair value of these loans as an increase in prepayment speeds results in a decreased valuation. For delinquent loans in which performance is not assumed and there is a higher probability of resolution of the loan ending in foreclosure, the weighted average life of such loans was 5.9 years. Average life is inversely related to the fair value of these loans as an increase in estimated life results in a decreased valuation. Additionally, the weighted average credit discount used as an input to value the specific loans was 1.18% with credit loss discounts ranging from 0%-16% at March 31, 2024.

MSRs—Fair value for MSRs is determined utilizing a valuation model which calculates the fair value of each servicing right based on the present value of estimated future cash flows. The Company uses a discount rate commensurate with the risk associated with each servicing right, given current market conditions. At March 31, 2024, the Company classified $201.0 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at March 31, 2024 was 10.99% with discount rates applied ranging from 1%-21%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. The fair value of MSRs was also estimated based on other assumptions including prepayment speeds and the cost to service. Prepayment speeds ranged from 0%-90% or a weighted average prepayment speed of 7.78%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $77 and $394, respectively, per loan. Prepayment speeds and the cost to service are both inversely related to the fair value of MSRs as an increase in prepayment speeds or the cost to service results in a decreased valuation. See Note (9) “Mortgage Servicing Rights (“MSRs”)” in Item 1 of this report for further discussion of MSRs.

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Derivative instruments—The Company’s derivative instruments include interest rate swaps, caps and collars, commitments to fund mortgages for sale into the secondary market (interest rate locks), forward commitments to end investors for the sale of mortgage loans, commodity future contracts and foreign currency contracts. Interest rate swaps, caps and collars and commodity future contracts are valued by a third party, using models that primarily use market observable inputs, such as yield curves and commodity prices prevailing at the measurement date, and are classified as Level 2 in the fair value hierarchy. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. The fair value for mortgage-related derivatives is based on changes in mortgage rates from the date of the commitments. The fair value of foreign currency derivatives is computed based on change in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

At March 31, 2024, the Company classified $6.2 million of derivative assets related to interest rate locks as Level 3. The fair value of interest rate locks is based on prices obtained for loans with similar characteristics from third parties, adjusted for the pull-through rate, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund. The weighted-average pull-through rate at March 31, 2024 was 82.11% with pull-through rates applied ranging from 6% to 100%. Pull-through rates are directly related to the fair value of interest rate locks as an increase in the pull-through rate results in an increased valuation.

Nonqualified deferred compensation assets—The underlying assets relating to the nonqualified deferred compensation plan are included in a trust and primarily consist of non-exchange traded institutional funds which are priced based by an independent third party service. These assets are classified as Level 2 in the fair value hierarchy.

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The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented:

	March 31, 2024
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	61,175	$	61,175	$	—	$	—
U.S. government agencies	45,715		—		45,715		—
Municipal	140,590		—		52,371		88,219
Corporate notes	76,725		—		76,725		—
Mortgage-backed	4,063,393		—		4,063,393		—
Trading account securities	2,184		—		2,184		—
Equity securities with readily determinable fair value	119,777		111,711		8,066		—
Mortgage loans held-for-sale	339,884		—		306,158		33,726
Loans held-for-investment	144,371		—		95,054		49,317
MSRs	201,044		—		—		201,044
Nonqualified deferred compensation assets	15,953		—		15,953		—
Derivative assets	259,264		—		253,052		6,212
Total	$	5,470,075	$	172,886	$	4,918,671	$	378,518
Derivative liabilities	$	324,364	$	—	$	324,364	$	—

	December 31, 2023
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	6,968	$	6,968	$	—	$	—
U.S. government agencies	45,124		—		45,124		—
Municipal	140,958		—		54,721		86,237
Corporate notes	76,531		—		76,531		—
Mortgage-backed	3,233,334		—		3,233,334		—
Trading account securities	4,707		—		4,707		—
Equity securities with readily determinable fair value	139,268		131,202		8,066		—
Mortgage loans held-for-sale	292,722		—		265,887		26,835
Loans held-for-investment	155,261		—		94,591		60,670
MSRs	192,456		—		—		192,456
Nonqualified deferred compensation assets	15,238		—		15,238		—
Derivative assets	275,726		—		271,216		4,510
Total	$	4,578,293	$	138,170	$	4,069,415	$	370,708
Derivative liabilities	$	267,255	$	—	$	267,255	$	—

	March 31, 2023
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	4,948	$	4,948	$	—	$	—
U.S. government agencies	74,862		—		74,862		—
Municipal	160,386		—		48,129		112,257
Corporate notes	83,675		—		83,675		—
Mortgage-backed	2,935,974		—		2,935,974		—
Trading account securities	102		—		102		—
Equity securities with readily determinable fair value	111,943		103,877		8,066		—
Mortgage loans held-for-sale	302,493		—		258,243		44,250
Loans held-for-investment	202,143		—		132,650		69,493
MSRs	224,470		—		—		224,470
Nonqualified deferred compensation assets	14,379		—		14,379		—
Derivative assets	274,004		—		268,648		5,356
Total	$	4,389,379	$	108,825	$	3,824,728	$	455,826
Derivative liabilities	$	274,432	$	—	$	274,432	$	—

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The aggregate remaining contractual principal balance outstanding as of March 31, 2024, December 31, 2023 and March 31, 2023 for mortgage loans held-for-sale measured at fair value under ASC 825 was $342.7 million, $291.7 million and $307.3 million, respectively, while the aggregate fair value of mortgage loans held-for-sale was $339.9 million, $292.7 million and $302.5 million, for the same respective periods, as shown in the above tables. At March 31, 2024, $1.3 million of mortgage loans held-for-sale were classified as nonaccrual compared to $649,000 as of December 31, 2023 and $3.3 million as of March 31, 2023. Additionally, there were $33.2 million of loans past due greater than 90 days and still accruing in the mortgage loans held-for-sale portfolio as of March 31, 2024 compared to $26.6 million as of December 31, 2023 and $41.4 million as of March 31, 2023. All of the nonaccrual loans and loans past due greater than 90 days and still accruing within the mortgage loans held-for-sale portfolio at March 31, 2024, December 31, 2023, and March 31, 2023 were individual delinquent mortgage loans bought back from GNMA at the unconditional option of the Company as servicer for those loans.

The aggregate remaining contractual principal balance outstanding as of March 31, 2024, December 31, 2023 and March 31, 2023 for loans held-for-investment measured at fair value under ASC 825 was $145.9 million, $156.9 million and $204.5 million, respectively, while the aggregate fair value of loans held-for-investment was $144.4 million, $155.3 million and $202.1 million, respectively, as shown in the above tables.

The changes in Level 3 assets measured at fair value on a recurring basis during the three months ended March 31, 2024 and 2023 are summarized as follows:

			Mortgage loans held-for-sale		Loans held-for- investment		Mortgage servicing rights		Derivative assets
(In thousands)	Municipal
Balance at January 1, 2024	$	86,237	$	26,835	$	60,670	$	192,456	$	4,510
Total net (losses) gains included in:
Net income (1)	—		67		(317)		8,588		1,702
Other comprehensive income or loss	(1,988)		—		—		—		—
Purchases	8,384		—		—		—		—
Settlements	(4,414)		(10,340)		(15,803)		—		—
Net transfers into Level 3	—		17,164		4,767		—		—
Balance at March 31, 2024	$	88,219	$	33,726	$	49,317	$	201,044	$	6,212

			Mortgage loans held-for-sale		Loans held-for- investment		Mortgage servicing rights		Derivative assets
(In thousands)	Municipal
Balance at January 1, 2023	$	117,537	$	48,655	$	84,165	$	230,225	$	1,711
Total net (losses) gains included in:
Net income (1)	—		466		364		(5,755)		3,645
Other comprehensive income or loss	(1,662)		—		—		—		—
Purchases	4,418		—		—		—		—
Settlements	(8,036)		(18,619)		(20,322)		—		—
Net transfers into Level 3	—		13,748		5,286		—		—
Balance at March 31, 2023	$	112,257	$	44,250	$	69,493	$	224,470	$	5,356

(1)Changes in the balance of mortgage loans held-for-sale, MSRs, and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

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Also, the Company may be required, from time to time, to measure certain other assets at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from impairment charges on individual assets. For assets measured at fair value on a non-recurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at March 31, 2024:

	March 31, 2024								Three Months Ended March 31, 2024 Fair Value Losses Recognized, net
(In thousands)	Total		Level 1		Level 2		Level 3
Individually assessed loans - foreclosure probable and collateral-dependent	$	89,368	$	—	$	—	$	89,368	$	16,726
Other real estate owned (1)	14,538		—		—		14,538		207
Total	$	103,906	$	—	$	—	$	103,906	$	16,933

(1)Net fair value losses recognized on other real estate owned include valuation adjustments and charge-offs during the respective period.

Individually assessed loans—In accordance with ASC 326, the allowance for credit losses for loans and other financial assets held at amortized cost should be measured on a collective or pooled basis when such assets exhibit similar risk characteristics. In instances in which a financial asset does not exhibit similar risk characteristics to a pool, the Company is required to measure such allowance for credit losses on an individual asset basis. For the Company’s loan portfolio, nonaccrual loans are considered to not exhibit similar risk characteristics as pools and thus are individually assessed. Credit losses are measured by estimating the fair value of the loan based on the present value of expected cash flows, the market price of the loan, or the fair value of the underlying collateral. Individually assessed loans are considered a fair value measurement where an allowance for credit loss is established based on the fair value of collateral. Appraised values on relevant real estate properties, which may require adjustments to market-based valuation inputs, are generally used on foreclosure probable and collateral-dependent loans within the real estate portfolios.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs of individually assessed loans. For more information on individually assessed loans refer to Note (7) “Allowance for Credit Losses” in Item 1 of this report. At March 31, 2024, the Company had $89.4 million of individually assessed loans classified as Level 3. All of the $89.4 million of individually assessed loans were measured at fair value based on the underlying collateral of the loan as shown in the table above. None were valued based on discounted cash flows in accordance with ASC 310.

Other real estate owned —Other real estate owned is comprised of real estate acquired in partial or full satisfaction of loans and is included in other assets. Other real estate owned is recorded at its estimated fair value less estimated selling costs at the date of transfer, with any excess of the related loan balance over the fair value less expected selling costs charged to the allowance for loan losses. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in other non-interest expense. Gains and losses upon sale, if any, are also charged to other non-interest expense. Fair value is generally based on third party appraisals and internal estimates that are adjusted by a discount representing the estimated cost of sale and is therefore considered a Level 3 valuation.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs for other real estate owned. At March 31, 2024, the Company had $14.5 million of other real estate owned classified as Level 3. The unobservable input applied to other real estate owned relates to the 10% reduction to the appraisal value representing the estimated cost of sale of the foreclosed property. A higher discount for the estimated cost of sale results in a decreased carrying value.

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The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at March 31, 2024 were as follows:

(Dollars in thousands)	Fair Value		Valuation Methodology	Significant Unobservable Input	Range of Inputs	Weighted Average of Inputs			Impact to valuation from an increased or higher input value
Measured at fair value on a recurring basis:
Municipal securities	$	88,219	Bond pricing	Equivalent rating	BBB-AA+	N/A			Increase
Mortgage loans held-for-sale	33,726		Discounted cash flows	Discount rate	6.60%	6.60%			Decrease
				Credit discount	0% - 12%	0.43%			Decrease
Loans held-for-investment	49,317		Discounted cash flows	Discount rate	6.60% - 6.63%	6.60%			Decrease
				Credit discount	0% - 16%	1.18%			Decrease
				Constant prepayment rate (CPR) - current loans	7.78%	7.78%			Decrease
				Average life - delinquent loans (in years)	1.1 years - 10.6 years	5.9 years			Decrease
MSRs	201,044		Discounted cash flows	Discount rate	1% - 21%	10.99%			Decrease
				Constant prepayment rate (CPR)	0% - 90%	7.78%			Decrease
				Cost of servicing	$70 - $200	$	77		Decrease
				Cost of servicing - delinquent	$200 - 1,000	$	394		Decrease
Derivatives	6,212		Discounted cash flows	Pull-through rate	6% - 100%	82.11		%	Increase
Measured at fair value on a non-recurring basis:
Individually assessed loans - foreclosure probable and collateral-dependent	89,368		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%			Decrease
Other real estate owned	14,538		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%			Decrease

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The Company is required under applicable accounting guidance to report the fair value of all financial instruments on the Consolidated Statements of Condition, including those financial instruments carried at cost. The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown:

	At March 31, 2024				At December 31, 2023				At March 31, 2023
	Carrying		Fair		Carrying		Fair		Carrying		Fair
(In thousands)	Value		Value		Value		Value		Value		Value
Financial Assets:
Cash and cash equivalents	$	379,886	$	379,886	$	423,464	$	423,464	$	445,986	$	445,986
Interest-bearing deposits with banks	2,131,077		2,131,077		2,084,323		2,084,323		1,563,578		1,563,578
Available-for-sale securities	4,387,598		4,387,598		3,502,915		3,502,915		3,259,845		3,259,845
Held-to-maturity securities	3,810,015		3,111,954		3,856,916		3,215,468		3,606,391		2,976,198
Trading account securities	2,184		2,184		4,707		4,707		102		102
Equity securities with readily determinable fair value	119,777		119,777		139,268		139,268		111,943		111,943
FHLB and FRB stock, at cost	224,657		224,657		205,003		205,003		244,957		244,957
Brokerage customer receivables	13,382		13,382		10,592		10,592		16,042		16,042
Mortgage loans held-for-sale, at fair value	339,884		339,884		292,722		292,722		302,493		302,493
Loans held-for-investment, at fair value	144,371		144,371		155,261		155,261		202,143		202,143
Loans held-for-investment, at amortized cost	43,086,335		42,068,619		41,976,570		41,090,010		39,363,328		38,577,761
Nonqualified deferred compensation assets	15,953		15,953		15,238		15,238		14,379		14,379
Derivative assets	259,264		259,264		275,726		275,726		274,004		274,004
Accrued interest receivable and other	487,933		487,933		477,832		477,832		417,066		417,066
Total financial assets	$	55,402,316	$	53,686,539	$	53,420,537	$	51,892,529	$	49,822,257	$	48,406,497
Financial Liabilities
Non-maturity deposits	$	38,554,438	$	38,554,438	$	38,772,098	$	38,772,098	$	37,366,959	$	37,366,959
Time certificates of deposit	7,894,420		7,872,870		6,625,072		6,603,746		5,351,252		4,970,556
FHLB advances	2,676,751		2,669,780		2,326,071		2,367,107		2,316,071		2,255,580
Other borrowings	575,408		573,752		645,813		643,755		583,548		555,615
Subordinated notes	437,965		413,003		437,866		413,501		437,493		410,827
Junior subordinated debentures	253,566		253,574		253,566		253,579		253,566		252,663
Derivative liabilities	324,364		324,364		267,255		267,255		274,432		274,432
Accrued interest payable	64,943		64,943		51,116		51,116		42,015		42,015
Total financial liabilities	$	50,781,855	$	50,726,724	$	49,378,857	$	49,372,157	$	46,625,336	$	46,128,647

Not all the financial instruments listed in the table above are subject to the disclosure provisions of ASC Topic 820, as certain assets and liabilities result in their carrying value approximating fair value. These include cash and cash equivalents, interest-bearing deposits with banks, brokerage customer receivables, FHLB and FRB stock, accrued interest receivable and accrued interest payable and non-maturity deposits.

The following methods and assumptions were used by the Company in estimating fair values of financial instruments that were not previously disclosed.

Held-to-maturity securities. Held-to-maturity securities include U.S. government-sponsored agency securities, municipal bonds issued by various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and mortgage-backed securities. Fair values for held-to-maturity securities are typically based on prices obtained from independent pricing vendors. In accordance with ASC 820, the Company has generally categorized these held-to-maturity securities as a Level 2 fair value measurement. Fair values for certain other held-to-maturity securities are based on the bond pricing methodology discussed previously related to certain available-for-sale securities. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 3 fair value measurement.

Loans held-for-investment, at amortized cost. Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are analyzed by type such as commercial, residential real estate, etc. Each category is further segmented by interest rate type (fixed and variable). The fair value for loans is estimated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect credit and interest rate risks inherent in the loan category. In accordance with ASC 820, the Company has categorized these loans as a Level 3 fair value measurement.

40

Time certificates of deposit. The fair value of time certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently in effect for time certificates of deposit. In accordance with ASC 820, the Company has categorized time certificates of deposit as a Level 3 fair value measurement.

FHLB advances. The fair value of FHLB advances is estimated by a discounted cash flow analysis based on current market rates of similar maturity debt securities to discount cash flows. In accordance with ASC 820, the Company has categorized FHLB advances as a Level 3 fair value measurement.

Subordinated notes. The fair value of the subordinated notes is based on a market price obtained from an independent pricing vendor. In accordance with ASC 820, the Company has categorized subordinated notes as a Level 2 fair value measurement.

Junior subordinated debentures. The fair value of the junior subordinated debentures is based on the discounted value of contractual cash flows. In accordance with ASC 820, the Company has categorized junior subordinated debentures as a Level 3 fair value measurement.

(16) Stock-Based Compensation Plans

As of March 31, 2024, approximately 737,000 shares were available for future grants, assuming the maximum number of shares are issued for the performance awards outstanding, approved under the Company Stock Incentive Plans (“the Plans”). Descriptions of the Plans are included in Note (18) “Stock Compensation Plans and Other Employee Benefit Plans” of the 2023 Form 10-K.

Stock-based compensation expense recognized in the Consolidated Statements of Income was $9.2 million in the first quarter of 2024 and $8.3 million in the first quarter of 2023.

A summary of the Plans’ stock option activity for the three months ended March 31, 2024 and March 31, 2023 is presented below:

Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2024	13,100	$	42.76
Granted	—	—
Exercised	(775)	32.26
Forfeited or canceled	—	—
Outstanding at March 31, 2024	12,325	$	43.42	4.2	$	751
Exercisable at March 31, 2024	12,325	$	43.42	4.2	$	751

Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2023	68,093	$	41.14
Granted	—	—
Exercised	(54,218)	40.87
Forfeited or canceled	—	—
Outstanding at March 31, 2023	13,875	$	42.18	4.7	$	427
Exercisable at March 31, 2023	13,875	$	42.18	4.7	$	427

(1)Represents the remaining weighted average contractual life in years.

(2)Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company’s stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.

The aggregate intrinsic value of options exercised during the three months ended March 31, 2024 and March 31, 2023, was approximately $50,000 and $2.5 million, respectively. Cash received from option exercises under the Plans for the three months ended March 31, 2024 and March 31, 2023 was approximately $25,000 and $2.2 million, respectively.

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A summary of the Plans’ restricted share activity for the three months ended March 31, 2024 and March 31, 2023 is presented below:

	Three months ended March 31, 2024			Three months ended March 31, 2023
Restricted Shares	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	746,123	$	79.60	610,155	$	73.21
Granted	305,807	98.92		242,576	89.82
Vested and issued	(219,622)	69.25		(96,649)	64.14
Forfeited or canceled	(3,154)	87.01		(1,968)	77.37
Outstanding at March 31	829,154	$	89.44	754,114	$	79.70
Vested, but deferred, at March 31	99,382	$	53.78	97,888	$	53.30

A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the three months ended March 31, 2024 and March 31, 2023 is presented below:

	Three months ended March 31, 2024			Three months ended March 31, 2023
Performance-based Stock	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	553,026	$	79.69	545,379	$	70.30
Granted	96,210	58.78		185,514	92.48
Added by performance factor at vesting	111,204	100.44		23,161	63.64
Vested and issued	(294,902)	58.69		(178,203)	63.64
Forfeited or canceled	(864)	95.40		(2,301)	78.20
Outstanding at March 31	464,674	$	93.62	573,550	$	79.24
Vested, but deferred, at March 31	21,493	$	43.71	35,852	$	44.59

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(17) Accumulated Other Comprehensive Income or Loss and Earnings Per Share

Accumulated Other Comprehensive Income or Loss

The following tables summarize the components of other comprehensive income or loss, including the related income tax effects, and the related amount reclassified to net income for the periods presented:

(In thousands)	Accumulated Unrealized (Losses) Gains on Securities		Accumulated Unrealized Gains (Losses) on Derivative Instruments		Accumulated Foreign Currency Translation Adjustments		Total Accumulated Other Comprehensive (Loss) Income
Balance at January 1, 2024	$	(350,697)	$	32,049	$	(42,583)	$	(361,231)
Other comprehensive loss during the period, net of tax, before reclassifications	(57,287)		(74,954)		(6,234)		(138,475)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	19		14,576		—		14,595
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(37)		—		—		(37)
Net other comprehensive (loss) during the period, net of tax	$	(57,305)	$	(60,378)	$	(6,234)	$	(123,917)
Balance at March 31, 2024	$	(408,002)	$	(28,329)	$	(48,817)	$	(485,148)

Balance at January 1, 2023	$	(386,057)	$	7,381	$	(48,960)	$	(427,636)
Other comprehensive income during the period, net of tax, before reclassifications	34,503		22,679		710		57,892
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(409)		2,749		—		2,340
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(32)		—		—		(32)
Net other comprehensive income during the period, net of tax	$	34,062	$	25,428	$	710	$	60,200
Balance at March 31, 2023	$	(351,995)	$	32,809	$	(48,250)	$	(367,436)

(In thousands)	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the
Details Regarding the Component of Accumulated Other Comprehensive Income (Loss)	Three Months Ended				Impacted Line on the Consolidated Statements of Income
	March 31,
	2024		2023
Accumulated unrealized gains on securities
Gains included in net income	$	(26)	$	560	Gains on investment securities, net
	(26)		560		Income before taxes
Tax effect	7		(151)		Income tax expense
Net of tax	$	(19)	$	409	Net income
Accumulated unrealized gains on derivative instruments
Amount reclassified to interest income on loans	$	24,475	$	9,072	Interest on Loans
Amount reclassified to interest expense on deposits	$	(4,657)	$	(5,588)	Interest on deposits
Amount reclassified to interest expense on other borrowings	—		263		Interest on other borrowings
	(19,818)		(3,747)		Income before taxes
Tax effect	5,242		998		Income tax expense
Net of tax	$	(14,576)	$	(2,749)	Net income

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Earnings per Share

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended
(Dollars in thousands, except per share data)		March 31, 2024		March 31, 2023
Net income		$	187,294	$	180,198
Less: Preferred stock dividends		6,991		6,991
Net income applicable to common shares	(A)	$	180,303	$	173,207
Weighted average common shares outstanding	(B)	61,481		60,950
Effect of dilutive potential common shares
Common stock equivalents		928		873
Weighted average common shares and effect of dilutive potential common shares	(C)	62,409		61,823
Net income per common share:
Basic	(A/B)	$	2.93	$	2.84
Diluted	(A/C)	$	2.89	$	2.80

Potentially dilutive common shares can result from stock options, restricted stock unit awards and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect of inclusion would either reduce the loss per share or increase the income per share.

At the January 2024 meeting of the board of directors of the Company (the “Board of Directors”), a quarterly cash dividend of $0.45 per share ($1.80 on an annualized basis) was declared. It was paid on February 22, 2024 to shareholders of record as of February 8, 2024.

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ITEM 2

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL

CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of the financial condition of Wintrust Financial Corporation and its subsidiaries (collectively, “Wintrust” or the “Company”) as of March 31, 2024 compared with December 31, 2023 and March 31, 2023, and the results of operations for the three month periods ended March 31, 2024 and March 31, 2023, should be read in conjunction with the unaudited consolidated financial statements and notes contained in this report and the risk factors discussed under Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (“2023 Form 10-K”) and in Part II, Item 1A, of this Form 10-Q. This discussion contains forward-looking statements that involve risks and uncertainties and, as such, future results could differ significantly from management’s current expectations. See the last section of this discussion for further information on forward-looking statements.

Introduction

Wintrust is a financial holding company that provides traditional community banking services and offers a full array of wealth management services, primarily to customers in the Chicago metropolitan area, southern Wisconsin and northwest Indiana, and operates other financing businesses on a national basis and in Canada through several non-bank business units.

Overview

First Quarter Highlights

The Company recorded net income of $187.3 million for the first quarter of 2024 compared to $180.2 million in the first quarter of 2023. The results for the first quarter of 2024 demonstrate increased net interest income primarily due to substantial growth in earning assets as well as the Company’s ability to navigate industry disruptions during the period due to the Company’s strong deposit franchise and balanced business model. Other key drivers included a favorable valuation adjustment to the fair value of MSRs, net of servicing hedge, and continued good credit quality metrics. Comprehensive income includes 1) net income as presented on the Company’s Consolidated Statements of Income and 2) other comprehensive income or loss from unrealized gains and losses on the Company’s available-for-sale investment securities portfolios and derivative contracts designated as cash flow hedges as well as foreign currency translation adjustments. Comprehensive income totaled $63.4 million for the first quarter of 2024 compared to $240.4 million for the first quarter of 2023.

The Company increased its loan portfolio from $39.6 billion at March 31, 2023 and $42.1 billion at December 31, 2023 to $43.2 billion at March 31, 2024. The increase in the current period compared to the prior periods was primarily a result of organic growth in several portfolios, including the commercial, commercial real estate, residential real estate loans held for investment portfolios, and property and casualty insurance premium finance receivable portfolios. For more information regarding changes in the Company’s loan portfolio, see Financial Condition – Interest Earning Assets and Note (6) “Loans” of the Consolidated Financial Statements in Item 1 of this report.

The Company recorded net interest income of $464.2 million in the first quarter of 2024 compared to $458.0 million in the first quarter of 2023. This increase in net interest income recorded in the first quarter of 2024 compared to the first quarter of 2023 resulted primarily from growth in earning assets, specifically a $3.0 billion increase in average loans. Net interest margin was 3.57% (3.59% on a fully taxable-equivalent basis, non-GAAP) in the first quarter of 2024 compared to 3.81% (3.83% on a fully taxable-equivalent basis, non-GAAP) in the first quarter of 2023. The decrease is primarily due to higher rates on interest-bearing liabilities, most notably interest-bearing deposits (see “Net Interest Income” for further detail).

Non-interest income totaled $140.6 million in the first quarter of 2024 compared to $107.8 million in the first quarter of 2023. The overall increase is primarily due to a $20.0 million gain recognized in the first quarter of 2024 related to the sale of the Company’s Retirement Benefits Advisors (“RBA”) division within its wealth management business and an increase in mortgage banking by $9.4 million in first quarter of 2024 compared to first quarter of 2023 (see “Non-Interest Income” for further detail).

Non-interest expense totaled $333.1 million in the first quarter of 2024, an increase of $34.0 million, or 11%, compared to the first quarter of 2023. This increase compared to the first quarter of 2023 was primarily attributable to increased salaries and employee benefits of $18.4 million, increased FDIC insurance due to the Company’s recognition of approximately $5.2 million accrued as a result of the FDIC special assessment on uninsured deposits in response to certain bank failures occurring in 2023 and increased software and equipment expenses of $3.0 million. (see “Non-Interest Expense” for further detail).

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Management considers the maintenance of adequate liquidity to be important to the management of risk. Accordingly, during the first quarter of 2024, the Company continued its practice of maintaining appropriate funding capacity to provide the Company with adequate liquidity for its ongoing operations. In this regard, the Company benefited from its strong deposit base, a liquid short-term investment portfolio and its access to funding from a variety of external funding sources. See “Deposits” and “Other Funding Sources” for additional information regarding liquidity sources.

RESULTS OF OPERATIONS

Earnings Summary

The Company’s key operating measures and growth rates for the three months ended March 31, 2024, as compared to the same period last year, are shown below:

	Three months ended
(Dollars in thousands, except per share data)	March 31, 2024			March 31, 2023			Percentage (%) or Basis Point (bp) Change
Net income	$	187,294		$	180,198		4	%
Pre-tax income, excluding provision for credit losses (non-GAAP) (1)	271,629			266,595			2
Net income per common share—Diluted	2.89			2.80			3
Net revenue (2)	604,774			565,764			7
Net interest income	464,194			457,995			1
Net interest margin	3.57		%	3.81		%	(24)	bps
Net interest margin - fully taxable-equivalent (non-GAAP) (1)	3.59			3.83			(24)
Net overhead ratio (3)	1.39			1.49			(10)
Return on average assets	1.35			1.40			(5)
Return on average common equity	14.42			15.67			(125)
Return on average tangible common equity (non-GAAP) (1)	16.75			18.55			(180)
At end of period
Total assets	$	57,576,933		$	52,873,511		9	%
Total loans, excluding loans held-for-sale	43,230,706			39,565,471			9
Total loans, including loans held-for-sale	43,570,590			39,867,964			9
Total deposits	46,448,858			42,718,211			9
Total shareholders’ equity	5,436,400			5,015,506			8
Book value per common share (1)	$	81.38		$	75.24		8
Tangible common book value per share (1)	70.40			64.22			10
Market price per common share	104.39			72.95			43
Allowance for loan and unfunded lending-related commitment losses to total loans	0.99		%	0.95		%	4	bps

(1)See following section titled “Supplemental Non-GAAP Financial Measures/Ratios” for additional information on this performance measure/ratio.

(2)Net revenue is net interest income plus non-interest income.

(3)The net overhead ratio is calculated by netting total non-interest expense and total non-interest income, annualizing this amount, and dividing by that period’s total average assets. A lower ratio indicates a higher degree of efficiency.

Certain returns, yields, performance ratios, and quarterly growth rates are “annualized” throughout this report to represent an annual time period. This is done for analytical purposes to better discern for decision-making purposes underlying performance trends when compared to full-year or year-over-year amounts. For example, balance sheet growth rates are most often expressed in terms of an annual rate. As such, 5% growth during a quarter would represent an annualized growth rate of 20%.

SUPPLEMENTAL NON-GAAP FINANCIAL MEASURES/RATIOS

The accounting and reporting policies of the Company conform to generally accepted accounting principles (“GAAP”) in the United States and prevailing practices in the banking industry. However, certain non-GAAP performance measures and ratios are used by management to evaluate and measure the Company’s performance. These include taxable-equivalent net interest income (including its individual components), taxable-equivalent net interest margin (including its individual components), the taxable-equivalent efficiency ratio, tangible common equity ratio, tangible book value per common share, return on average tangible common equity and pre-tax income, excluding provision for credit losses. Management believes that these measures and ratios provide users of the Company’s financial information a more meaningful view of the performance of the Company’s interest-earning assets and interest-bearing liabilities and of the Company’s operating efficiency. Other financial holding companies may define or calculate these measures and ratios differently.

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Management reviews yields on certain asset categories and the net interest margin of the Company and its banking subsidiaries on a fully taxable-equivalent (“FTE”) basis. In this non-GAAP presentation, net interest income is adjusted to reflect tax-exempt interest income on an equivalent before-tax basis using tax rates effective as of the end of the period. This measure ensures comparability of net interest income arising from both taxable and tax-exempt sources. Net interest income on a fully taxable-equivalent basis is also used in the calculation of the Company’s efficiency ratio. The efficiency ratio, which is calculated by dividing non-interest expense by total taxable-equivalent net revenue (less securities gains or losses), measures how much it costs to produce one dollar of revenue. Securities gains or losses are excluded from this calculation to better match revenue from daily operations to operational expenses. Management considers the tangible common equity ratio and tangible book value per common share as useful measurements of the Company’s equity. The Company references the return on average tangible common equity as a measurement of profitability. Management considers pre-tax income, excluding provision for credit losses as a useful measurement of the Company’s core net income.

A reconciliation of certain non-GAAP performance measures and ratios used by the Company to evaluate and measure the Company’s performance to the most directly comparable GAAP financial measures is shown below:

	Three Months Ended
	March 31,			December 31,			March 31,
(Dollars and shares in thousands)	2024			2023			2023
Reconciliation of Non-GAAP Net Interest Margin and Efficiency Ratio:
(A) Interest Income (GAAP)	$	805,513		$	793,848		$	639,690
Taxable-equivalent adjustment:
- Loans	2,246			2,150			1,872
- Liquidity management assets	550			575			551
- Other earning assets	5			4			4
(B) Interest Income (non-GAAP)	$	808,314		$	796,577		$	642,117
(C) Interest Expense (GAAP)	341,319			323,874			181,695
(D) Net Interest Income (GAAP) (A minus C)	$	464,194		$	469,974		$	457,995
(E) Net Interest Income, fully taxable-equivalent (non-GAAP) (B minus C)	$	466,995		$	472,703		$	460,422
Net interest margin (GAAP)	3.57		%	3.62		%	3.81		%
Net interest margin, fully taxable-equivalent (non-GAAP)	3.59			3.64			3.83
(F) Non-interest income	$	140,580		$	100,829		$	107,769
(G) Gains on investment securities, net	1,326			2,484			1,398
(H) Non-interest expense	333,145			362,652			299,169
Efficiency ratio (H/(D+F-G))	55.21		%	63.81		%	53.01		%
Efficiency ratio (non-GAAP) (H/(E+F-G))	54.95			63.51			52.78
Reconciliation of Non-GAAP Tangible Common Equity Ratio:
Total shareholders’ equity (GAAP)	$	5,436,400		$	5,399,526		$	5,015,506
Less: Non-convertible preferred stock (GAAP)	(412,500)			(412,500)			(412,500)
Less: Acquisition-related intangible assets (GAAP)	(677,911)			(679,561)			(674,538)
(I) Total tangible common shareholders’ equity (non-GAAP)	$	4,345,989		$	4,307,465		$	3,928,468
(J) Total assets (GAAP)	$	57,576,933		$	56,259,934		$	52,873,511
Less: Acquisition-related intangible assets (GAAP)	(677,911)			(679,561)			(674,538)
(K) Total tangible assets (non-GAAP)	$	56,899,022		$	55,580,373		$	52,198,973
Common equity to assets ratio (GAAP) (L/J)	8.7		%	8.9		%	8.7		%
Tangible common equity ratio (non-GAAP) (I/K)	7.6			7.7			7.5
Reconciliation of Non-GAAP Tangible Book Value per Common Share:
Total shareholders’ equity	$	5,436,400		$	5,399,526		$	5,015,506
Less: Preferred stock	(412,500)			(412,500)			(412,500)
(L) Total common equity	$	5,023,900		$	4,987,026		$	4,603,006
(M) Actual common shares outstanding	61,737			61,244			61,176
Book value per common share (L/M)	$	81.38		$	81.43		$	75.24
Tangible book value per common share (non-GAAP) (I/M)	70.40			70.33			64.22

47

Reconciliation of Non-GAAP Return on Average Tangible Common Equity:
(N) Net income applicable to common shares	$	180,303		$	116,489		$	173,207
Add: Acquisition-related intangible asset amortization	1,158			1,356			1,235
Less: Tax effect of acquisition-related intangible asset amortization	(291)			(343)			(321)
After-tax acquisition-related intangible asset amortization	$	867		$	1,013		$	914
(O) Tangible net income applicable to common shares (non-GAAP)	$	181,170		$	117,502		$	174,121
Total average shareholders’equity	$	5,440,457		$	5,066,196		$	4,895,271
Less: Average preferred stock	(412,500)			(412,500)			(412,500)
(P) Total average common shareholders’ equity	$	5,027,957		$	4,653,696		$	4,482,771
Less: Average acquisition-related intangible assets	(678,731)			(679,812)			(675,247)
(Q) Total average tangible common shareholders’ equity (non-GAAP)	$	4,349,226		$	3,973,884		$	3,807,524
Return on average common equity, annualized (N/P)	14.42		%	9.93		%	15.67		%
Return on average tangible common equity, annualized (non-GAAP) (O/Q)	16.75			11.73			18.55

Reconciliation of Non-GAAP Pre-Tax, Pre-Provision Income:
Income before taxes	$	249,956	$	165,243	$	243,550
Add: Provision for credit losses	21,673		42,908		23,045
Pre-tax income, excluding provision for credit losses (non-GAAP)	$	271,629	$	208,151	$	266,595

Critical Accounting Estimates

The Company’s Consolidated Financial Statements are prepared in accordance with GAAP in the United States, prevailing practices of the banking industry, and the application of accounting policies of which are described in Note (1) “Summary of Significant Accounting Policies” to the Consolidated Financial Statements in Item 8 of the Company’s 2023 Form 10-K. These policies require numerous estimates and strategic or economic assumptions, which may prove inaccurate or subject to variations. Changes in underlying factors, assumptions or estimates could have a material impact on the Company’s future financial condition and results of operations. At March 31, 2024, management views critical accounting estimates to include the determination of the allowance for credit losses, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be most subject to revision as new information becomes available. These estimates were reviewed with the Audit Committee of the Board of Directors.

Allowance for Credit Losses, including the Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Allowance for Held-to-Maturity Debt Securities

The allowance for credit losses represents management’s estimate of expected credit losses over the life of a financial asset carried at amortized cost. Determining the amount of the allowance for credit losses is considered a critical accounting estimate because it requires significant judgment and the use of estimates related to the fair value of the underlying collateral and amount and timing of expected future cash flows on individually assessed financial assets, estimated credit losses on pools of loans with similar risk characteristics, and consideration of reasonable and supportable forecasts of macroeconomic conditions, all of which are susceptible to significant change. At March 31, 2024, the loan and held-to-maturity debt securities portfolios represent 82% of the total assets on the Company’s consolidated balance sheet. The Company also maintains an allowance for lending-related commitments, specifically unfunded loan commitments and letters of credit, which relates to certain amounts the Company is committed to lend (not unconditionally cancelable) but for which funds have not yet been disbursed.

Key macroeconomic variable data points that are significant inputs into our credit loss models for the commercial and commercial real estate portfolios are the Baa corporate credit spread as well as CREPI specifically related to the commercial real estate portfolio. Holding all other inputs constant, the table below shows the impact of changes in these key macroeconomic variable data points on the estimate of allowance for credit losses.

	Impact to estimated allowance for credit losses from an increased or higher input value
Baa Credit Spread	Increases
CRE Price Index	Decreases

48

Holding all other inputs constant, the following table provides a sensitivity analysis for the commercial and commercial real estate portfolios based on a 20 basis point change in Baa credit spreads from the assumption utilized in the estimate of that portfolio’s allowance for credit losses at March 31, 2024:

Baa Credit Spread
	Narrows	Widens
Commercial	Decreases estimate by 10%-15%	Increases estimate by 15%-20%
Commercial Real Estate:
Construction	Decreases estimate by 15%-20%	Increases estimate by 15%-20%
Non-Construction	Decreases estimate by 4%-5%	Increases estimate by 4%-5%

Holding all other inputs constant, the following table provides a sensitivity analysis for the commercial real estate construction and non-construction portfolios based on a 10% change in CREPI from the assumption utilized in the estimate of that portfolio’s allowance for credit losses at March 31, 2024:

CRE Price Index
	Increases	Decreases
Commercial Real Estate:
Construction	Decreases estimate by 45%-50%	Increases estimate by 95%-100%
Non-Construction	Decreases estimate by 25%-30%	Increases estimate by 55%-60%

See Note (7) “Allowance for Credit Losses” to the Consolidated Financial Statements in Item 1 of this report and the section titled “Credit Quality” in Item 2 of this report for a description of the methodology used to determine the allowance for credit losses.

For a more detailed discussion on these critical accounting estimates, see “Summary of Critical Accounting Estimates” beginning on page 57 of the 2023 Form 10-K.

Net Income

Net income for the quarter ended March 31, 2024 totaled $187.3 million, an increase of $7.1 million, or 4%, compared to the quarter ended March 31, 2023. On a per share basis, net income for the first quarter of 2024 totaled $2.89 per diluted common share compared to $2.80 for the first quarter of 2023.

The increase in net income for the first quarter of 2024 as compared to the same period in the prior year is primarily attributable to increased net interest income, higher mortgage banking revenue, and a $20.0 million gain recognized in the first quarter of 2024 related to the sale of the Company’s RBA division within its wealth management business, partially offset by higher salaries and benefits and FDIC insurance special assessment. See “Net Interest Income”, “Non-interest Income”, “Non-interest Expense” and “Credit Quality” for further detail.

Net Interest Income

The primary source of the Company’s revenue is net interest income. Net interest income is the difference between interest income and fees on earning assets, such as loans and securities, and interest expense on the liabilities to fund those assets, including interest-bearing deposits and other borrowings. The amount of net interest income is affected by both changes in the level of interest rates, and the amount and composition of earning assets and interest bearing liabilities.

49

Quarter Ended March 31, 2024 compared to the Quarters Ended December 31, 2023 and March 31, 2023

The following table presents a summary of the Company’s average balances, net interest income and related net interest margins, including a calculation on a fully taxable-equivalent basis, for the first quarter of 2024 as compared to the fourth quarter of 2023 (sequential quarters) and first quarter of 2023 (linked quarters):

	Average Balance for three months ended,						Interest for three months ended,						Yield/Rate for three months ended,
(Dollars in thousands)	Mar 31, 2024		Dec 31, 2023		Mar 31, 2023		Mar 31, 2024		Dec 31, 2023		Mar 31, 2023		Mar 31, 2024		Dec 31, 2023		Mar 31, 2023
Interest-bearing deposits with banks, securities purchased under resale agreements and cash equivalents(1)	$	1,254,332	$	1,682,176	$	1,235,748	$	16,677	$	22,340	$	13,538	5.35	%	5.27	%	4.44	%
Investment securities(2)	8,349,796		7,971,068		7,956,722		70,228		68,812		60,494		3.38		3.42		3.08
FHLB and FRB stock	230,648		204,593		233,615		4,478		3,792		3,680		7.81		7.35		6.39
Liquidity management assets(3)(8)	$	9,834,776	$	9,857,837	$	9,426,085	$	91,383	$	94,944	$	77,712	3.74	%	3.82	%	3.34	%
Other earning assets(3)(4)(8)	15,081		14,821		18,445		198		222		313		5.25		5.92		6.87
Mortgage loans held-for-sale	290,275		279,569		270,966		4,146		4,318		3,528		5.74		6.13		5.28
Loans, net of unearned income(3)(5)(8)	42,129,893		41,361,952		39,093,368		712,587		697,093		560,564		6.80		6.69		5.82
Total earning assets(8)	$	52,270,025	$	51,514,179	$	48,808,864	$	808,314	$	796,577	$	642,117	6.22	%	6.13	%	5.34	%
Allowance for loan and investment security losses	(361,734)		(329,441)		(282,704)
Cash and due from banks	450,267		443,989		488,457
Other assets	3,244,137		3,388,348		3,060,701
Total assets	$	55,602,695	$	55,017,075	$	52,075,318
NOW and interest-bearing demand deposits	$	5,680,265	$	5,868,976	$	5,271,740	$	34,896	$	38,124	$	18,772	2.47	%	2.58	%	1.44	%
Wealth management deposits	1,510,203		1,704,099		2,167,081		10,461		12,076		12,258		2.79		2.81		2.29
Money market accounts	14,474,492		14,212,320		12,533,468		137,984		130,252		68,276		3.83		3.64		2.21
Savings accounts	5,792,118		5,676,155		4,830,322		39,071		36,463		15,816		2.71		2.55		1.33
Time deposits	7,148,456		6,645,980		5,041,638		77,120		68,475		29,680		4.34		4.09		2.39
Interest-bearing deposits	$	34,605,534	$	34,107,530	$	29,844,249	$	299,532	$	285,390	$	144,802	3.48	%	3.32	%	1.97	%
Federal Home Loan Bank advances	2,728,849		2,326,073		2,474,882		22,048		18,316		19,135		3.25		3.12		3.14
Other borrowings	627,711		633,673		602,937		9,248		9,557		7,854		5.92		5.98		5.28
Subordinated notes	437,893		437,785		437,422		5,487		5,522		5,488		5.04		5.00		5.02
Junior subordinated debentures	253,566		253,566		253,566		5,004		5,089		4,416		7.94		7.96		6.97
Total interest-bearing liabilities	$	38,653,553	$	37,758,627	$	33,613,056	$	341,319	$	323,874	$	181,695	3.55	%	3.40	%	2.19	%
Non-interest-bearing deposits	9,972,646		10,406,585		12,171,631
Other liabilities	1,536,039		1,785,667		1,395,360
Equity	5,440,457		5,066,196		4,895,271
Total liabilities and shareholders’ equity	$	55,602,695	$	55,017,075	$	52,075,318
Interest rate spread(6)(8)													2.67	%	2.73	%	3.15	%
Less: Fully taxable-equivalent adjustment							(2,801)		(2,729)		(2,427)		(0.02)		(0.02)		(0.02)
Net free funds/contribution(7)	$	13,616,472	$	13,755,552	$	15,195,808							0.92		0.91		0.68
Net interest income/margin (GAAP)(8)							$	464,194	$	469,974	$	457,995	3.57	%	3.62	%	3.81	%
Fully taxable-equivalent adjustment							2,801		2,729		2,427		0.02		0.02		0.02
Net interest income/margin, fully taxable-equivalent (non-GAAP)(8)							$	466,995	$	472,703	$	460,422	3.59	%	3.64	%	3.83	%

(1)Includes interest-bearing deposits with banks and securities purchased under resale agreements with original maturities of greater than three months. Cash equivalents include federal funds sold and securities purchased under resale agreements with original maturities of three months or less.

(2)Investment securities includes investment securities classified as available-for-sale and held-to-maturity, and equity securities with readily determinable fair values. Equity securities without readily determinable fair values are included within other assets.

(3)Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on the marginal federal corporate tax rate in effect as of the applicable period. The total adjustments for the three months ended March 31, 2024, December 31, 2023 and March 31, 2023 were $2.8 million, $2.7 million and $2.4 million, respectively.

(4)Other earning assets include brokerage customer receivables and trading account securities.

(5)Loans, net of unearned income, include nonaccrual loans.

(6)Interest rate spread is the difference between the yield earned on earning assets and the rate paid on interest-bearing liabilities.

(7)Net free funds are the difference between total average earning assets and total average interest-bearing liabilities. The estimated contribution to net interest margin from net free funds is calculated using the rate paid for total interest-bearing liabilities.

(8)See “Supplemental Non-GAAP Financial Measures/Ratios” for additional information on this performance measure/ratio.

50

For the first quarter of 2024, net interest income totaled $464.2 million, an decrease of $5.8 million as compared to the fourth quarter of 2023, and an increase of $6.2 million as compared to the first quarter of 2023. Net interest margin was 3.57% (3.59% on a FTE basis, non-GAAP) during the first quarter of 2024 compared to 3.62% (3.64% on a FTE basis, non-GAAP) during the fourth quarter of 2023, and 3.81% (3.83% on a FTE basis, non-GAAP) during the first quarter of 2023.

Analysis of Changes in Net Interest Income on a FTE basis (non-GAAP)

The following table presents an analysis of the changes in the Company’s net interest income on a FTE basis (non-GAAP) comparing the three month ended March 31, 2024 to each of the three month periods ended December 31, 2023 and March 31, 2023. The reconciliations set forth the changes in the net interest income on a FTE basis (non-GAAP) as a result of changes in volumes, changes in rates and differing number of days in each period:

	First Quarter of 2024 Compared to Fourth Quarter of 2023		First Quarter of 2024 Compared to First Quarter of 2023
(In thousands)
Net interest income, FTE basis (non-GAAP)(1) for comparative period	$	472,703	$	460,422
Change due to mix and growth of earning assets and interest-bearing liabilities (volume)	2,901		17,164
Change due to interest rate fluctuations (rate)	(3,415)		(15,650)
Change due to number of days in each period	(5,194)		5,059
Less: FTE adjustment	(2,801)		(2,801)
Net interest income (GAAP)(1) for the period ended March 31, 2024	$	464,194	$	464,194
FTE adjustment	2,801		2,801
Net interest income, FTE basis (non-GAAP)(1)	$	466,995	$	466,995

(1) See “Supplemental Non-GAAP Financial Measures/Ratios” for additional information on this performance measure/ratio.

Non-interest Income

The following table presents non-interest income by category for the periods presented:

	Three Months Ended				$ Change		% Change
(Dollars in thousands)	March 31, 2024		March 31, 2023
Brokerage	$	5,556	$	4,533	$	1,023	23	%
Trust and asset management	29,259		25,412		3,847		15
Total wealth management (1)	34,815		29,945		4,870		16
Mortgage banking	27,663		18,264		9,399		51
Service charges on deposit accounts	14,811		12,903		1,908		15
Gains on investment securities, net	1,326		1,398		(72)		(5)
Fees from covered call options	4,847		10,391		(5,544)		(53)
Trading gains, net	677		813		(136)		(17)
Operating lease income, net	14,110		13,046		1,064		8
Other:
Interest rate swap fees	2,828		2,606		222		9
BOLI	1,651		1,351		300		22
Administrative services	1,217		1,615		(398)		(25)
Foreign currency remeasurement losses	(1,171)		(188)		(983)		NM
Changes in fair value on EBOs and loans held-for-investment	(439)		545		(984)		NM
Early pay-offs of capital leases	430		365		65		18
Miscellaneous	37,815		14,715		23,100		NM
Total Other	42,331		21,009		21,322		NM
Total Non-interest Income	$	140,580	$	107,769	$	32,811	30	%

(1)Wealth management revenue is comprised of the trust and asset management revenue of the CTC and Great Lakes Advisors, the brokerage commissions, managed money fees and insurance product commissions at Wintrust Investments and fees from tax-deferred like-kind exchange services provided by CDEC.

 NM—Not Meaningful.

51

Notable contributions to the change in non-interest income are as follows:

Wealth management revenue increased by $4.9 million in the first quarter of 2024 as compared to the first quarter of 2023 primarily due to increased asset management fees as a result of higher assets under management during the period.

Mortgage banking revenue increased for the three months ended March 31, 2024 as compared to the same period in 2023 as a result of higher net revenue related to MSR activity and valuation adjustments and an increase in loans originated for sale. Mortgage banking revenue includes revenue from activities related to originating, selling and servicing residential real estate loans for the secondary market. A main factor in the mortgage banking revenue recognized by the Company is the volume of mortgage loans originated or purchased for sale. Mortgage loans originated for sale totaled $475.6 million in the first quarter of 2024 as compared to $372.3 million in the first quarter of 2023. The increase in originations from the comparative three month period was driven by growth in both purchase and refinance originations as housing inventories have improved and interest rates pulled back from peak levels reached in 2023. The percentage of origination volume from refinancing activities was 25% for the three months ended March 31, 2024, as compared to 20%, for the same period in 2023.

The Company records MSRs at fair value on a recurring basis. For the three months ended March 31, 2024, the fair value of the MSRs portfolio increased as a favorable fair value adjustment of $7.6 million was recorded as well as retained servicing rights led to capitalization of $5.4 million, partially offset by a reduction in value of $4.4 million due to payoffs, paydowns and repurchases of the existing portfolio. See Note (9) “Mortgage Servicing Rights (“MSRs”)” to the Consolidated Financial Statements in Item 1 of this report for a summary of the changes in the carrying value of MSRs.

Mortgage banking revenue is also impacted by changes in the fair value of derivative contracts held to economically hedge a portion of the fair value adjustments related to the Company’s MSRs portfolio. The change in fair value of the derivative contracts held as an economic hedge was an unfavorable $2.6 million for the three months ended March 31, 2024.

The Company has typically written call options with terms of less than three months against certain U.S. Treasury and agency securities held in its portfolio for liquidity and other purposes. Management has effectively entered into these transactions with the goal of economically hedging security positions and enhancing its overall return on its investment portfolio. These option transactions are designed to increase the total return associated with holding certain investment securities and do not qualify as hedges pursuant to accounting guidance. There were no outstanding call option contracts at March 31, 2024 and 2023.

Miscellaneous non-interest income includes loan servicing fees, income from other investments, and other fees. This category of income increased $23.1 million for the three months ended March 31, 2024 compared to 2023. The increased income was primarily due to a $20.0 million gain recognized in the first quarter of 2024 related to the sale of the Company’s RBA division within its wealth management business.

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The table below presents additional selected information regarding mortgage banking for the respective periods.

	Three Months Ended
(Dollars in thousands)	March 31, 2024			March 31, 2023
Originations:
Retail originations	$	331,504		$	256,137
Veterans First originations	144,109			116,204
Total originations for sale (A)	$	475,613		$	372,341
Originations for investment	169,246			131,180
Total originations	$	644,859		$	503,521
Retail originations as percentage of originations for sale	70		%	69		%
Veterans First originations as a percentage of originations for sale	30			31
Purchases as a percentage of originations for sale	75		%	80		%
Refinances as a percentage of originations for sale	25			20
Production Margin:
Production revenue (B) (1)	$	13,435		$	8,621
Total originations for sale (A)	$	475,613		$	372,341
Add: Current period end mandatory interest rate lock commitments to fund originations for sale (2)	207,775			184,168
Less: Prior period end mandatory interest rate lock commitments to fund originations for sale (2)	119,624			113,303
Total mortgage production volume (C)	$	563,764		$	443,206
Production margin (B/C)	2.38		%	1.95		%
Mortgage Servicing:
Loans serviced for others (D)	$	12,051,392		$	14,080,461
MSRs, at fair value (E)	201,044			224,470
Percentage of MSRs to loans serviced for others (E/D)	1.67		%	1.59		%
Servicing income	$	10,498		$	12,052
Components of MSR:
MSR - changes in fair value model assumptions	$	7,595		$	(6,953)
Changes in fair value of derivative contract held as an economic hedge, net	(2,577)			946
MSR valuation adjustment, net of changes in fair value of derivative contract held as an economic hedge	$	5,018		$	(6,007)
MSR - current period capitalization	5,379			5,107
MSR - collection of expected cash flow - paydowns	(1,444)			(1,788)
MSR - collection of expected cash flow - payoffs and repurchases	(2,942)			(2,121)
MSR activity	$	6,011		$	(4,809)
Summary of Mortgage Banking Revenue:
Production revenue (1)	$	13,435		$	8,621
Servicing income	10,498			12,052
MSR activity	6,011			(4,809)
Changes in fair value on early buy-out loans guaranteed by U.S. government agencies and other revenue	(2,281)			2,400
Total mortgage banking revenue	$	27,663		$	18,264

(1)Production revenue represents revenue earned from the origination and subsequent sale of mortgages, including gains on loans sold and fees from originations, changes in other related financial instruments carried at fair value, processing and other related activities, and excludes servicing fees, changes in the fair value of servicing rights and changes to the mortgage recourse obligation and other non-production revenue.

(2)Certain volume adjusted for the estimated pull-through rate of the loan, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund.

53

Non-interest Expense

The following table presents non-interest expense by category for the periods presented:

	Three months ended				$ Change		% Change
(Dollars in thousands)	March 31, 2024		March 31, 2023
Salaries and employee benefits:
Salaries	$	112,172	$	108,354	$	3,818	4	%
Commissions and incentive compensation	51,001		39,799		11,202		28
Benefits	32,000		28,628		3,372		12
Total salaries and employee benefits	195,173		176,781		18,392		10
Software and equipment	27,731		24,697		3,034		12
Operating lease equipment	10,683		9,833		850		9
Occupancy, net	19,086		18,486		600		3
Data processing	9,292		9,409		(117)		(1)
Advertising and marketing	13,040		11,946		1,094		9
Professional fees	9,553		8,163		1,390		17
Amortization of other acquisition-related intangible assets	1,158		1,235		(77)		(6)
FDIC insurance	9,381		8,669		712		8
FDIC insurance - special assessment	5,156		—		5,156		NM
OREO expense, net	392		(207)		599		NM
Other:
Lending expenses, net of deferred originations costs	5,078		3,099		1,979		64
Travel and entertainment	4,597		4,590		7		0
Miscellaneous	22,825		22,468		357		2
Total other	32,500		30,157		2,343		8
Total Non-interest Expense	$	333,145	$	299,169	$	33,976	11	%

NM - Not meaningful.

Notable contributions to the change in non-interest expense are as follows:

Salaries and employee benefits expense increased for the three months ended March 31, 2024 as compared to the same period in 2023. The increase was primarily due to commissions and incentive compensation as a result of increased incentive bonus accruals and higher commission expense related to increased mortgage production as well as commissions related to the sale of the Company’s RBA division within its wealth management business in the first quarter of 2024.

Software and equipment expense increased for the three months ended March 31, 2024 as compared to the same period in 2023 as a result of higher software license fees as well as higher computer and software depreciation expense as the Company invests in enhancements to the digital customer experience, upgrades to infrastructure and enhancements to information security capabilities.

FDIC insurance expense increased for the three months ended March 31, 2024 compared to the same period in 2023 primarily due to the Company’s recognition of approximately $5.2 million accrued as a result of the FDIC special assessment on uninsured deposits in response to certain bank failures occurring in 2023.

Miscellaneous expense includes ATM expenses, correspondent bank charges, directors’ fees, telephone, postage, corporate insurance, dues and subscriptions, problem loan expenses and other miscellaneous operational losses and costs.

Income Taxes

The Company recorded income tax expense of $62.7 million in the first quarter of 2024 compared to $63.4 million in the first quarter of 2023. The effective tax rates were 25.07% in the first quarter of 2024 compared to 26.01% in the first quarter of 2023.

The effective tax rates were partially impacted by the tax effects related to share-based compensation which fluctuate based on the Company’s stock price and timing of employee stock option exercises and vesting of other shared-based awards. The

54

Company recorded net excess tax benefits of $4.4 million in the first quarter of 2024, compared to net excess tax benefits of $2.8 million in the first quarter of 2023 related to share-based compensation.

Operating Segment Results

The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management. Refer to Note (13) “Segment Information” to the Consolidated Financial Statements in Item 1 of this report for further information on the Company’s primary segments. The Company’s profitability is primarily dependent on the net interest income, provision for credit losses, non-interest income and operating expenses of its community banking segment.

The community banking segment’s net interest income for the quarter ended March 31, 2024 totaled $363.7 million as compared to $369.8 million for the same period in 2023, a decrease of $6.2 million, or 2%. The decrease in the three month period was primarily attributable to increased interest expense on deposits. The community banking segment’s non-interest income totaled $74.6 million in the first quarter of 2024, an increase of $5.9 million, or 9%, when compared to the first quarter of 2023 total of $68.7 million. The increase in the three month period was primarily the result of increased mortgage banking revenue due to the increase in the fair value of MSRs related to the changes in fair value model assumptions. The community banking segment recorded provision for credit losses of $20.4 million for the three months ended March 31, 2024, compared to $21.1 million for the same periods in 2023. The decrease in provision for credit losses for the three month period was mainly related to narrower forecasted Baa credit spreads. The community banking segment’s net income for the quarter ended March 31, 2024 totaled $120.0 million, an decrease of $14.2 million as compared to net income in the first quarter of 2023 of $134.2 million.

The specialty finance segment’s net interest income totaled $82.3 million for the quarter ended March 31, 2024, compared to $70.4 million for the same period in 2023, an increase of $11.9 million, or 17%. The increase for the three month period was primarily due to loan growth and increased interest rates on the premium finance receivables portfolios. The specialty finance segment’s non-interest income increased to $27.3 million from $25.8 million for the three months ended March 31, 2024 and 2023, respectively. Our property and casualty insurance premium finance operations, life insurance finance operations, lease financing operations and accounts receivable finance operations accounted for 47%, 32%, 19% and 2%, respectively, of the total revenues of our specialty finance business for the three month period ended March 31, 2024. The net income of the specialty finance segment for the quarter ended March 31, 2024 totaled $42.5 million as compared to $36.7 million for the quarter ended March 31, 2023.

The wealth management segment reported net interest income of $7.8 million for the first quarter of 2024 compared to $9.0 million in the same quarter of 2023, an decrease of $1.2 million, or 13%. Net interest income for this segment is primarily comprised of an allocation of the net interest income earned by the community banking segment on non-interest-bearing and interest-bearing wealth management customer account balances on deposit at the banks. Wealth management customer account balances on deposit at the banks averaged $1.5 billion and $2.2 billion in the first three months of 2024 and 2023, respectively. This segment recorded non-interest income of $58.5 million for the first quarter of 2024 compared to $30.3 million for the first quarter of 2023. The increase was primarily due to a $20.0 million gain recognized in the first quarter of 2024 related to the sale of the Company’s RBA division within the wealth management business. Distribution of wealth management services through each bank continues to be a focus of the Company. The Company is committed to growing the wealth management segment in order to better service its customers and create a more diversified revenue stream. The wealth management segment’s net income totaled $24.7 million for the first quarter of 2024 compared to $9.2 million for the first quarter of 2023.

Financial Condition

Total assets were $57.6 billion at March 31, 2024, representing an increase of $4.7 billion, or 9%, when compared to March 31, 2023 and an increase of approximately $1.3 billion, or 9% on an annualized basis, when compared to December 31, 2023. Total funding, which includes deposits, all notes and advances, including secured borrowings and the junior subordinated debentures, was $50.4 billion at March 31, 2024, $49.1 billion at December 31, 2023, and $46.3 billion at March 31, 2023. See Notes (5), (6), (10), (11) and (12) of the Consolidated Financial Statements presented under Item 1 of this report for additional period-end detail on the Company’s interest-earning assets and funding liabilities.

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Interest-Earning Assets

The following table sets forth, by category, the composition of average earning asset balances and the relative percentage of total average earning assets for the periods presented:

	Three Months Ended
	March 31, 2024				December 31, 2023				March 31, 2023
(Dollars in thousands)	Balance		Percent		Balance		Percent		Balance		Percent
Mortgage loans held-for-sale	$	290,275	1	%	$	279,569	1	%	$	270,966	1	%
Loans, net of unearned income
Commercial	$	12,903,752	25	%	$	12,573,274	25	%	$	12,401,473	25	%
Commercial real estate	11,507,050		22		11,171,893		22		10,144,301		21
Home equity	343,861		1		341,015		1		333,195		1
Residential real estate	2,730,938		5		2,639,667		5		2,336,190		5
Premium finance receivables	14,564,075		28		14,551,554		28		13,811,566		28
Other loans	80,217		0		84,549		0		66,643		0
Total average loans (1)	$	42,129,893	81	%	$	41,361,952	81	%	$	39,093,368	80	%
Liquidity management assets (2)	9,834,776		18		9,857,837		18		9,426,085		19
Other earning assets (3)	15,081		0		14,821		0		18,445		0
Total average earning assets	$	52,270,025	100	%	$	51,514,179	100	%	$	48,808,864	100	%
Total average assets	$	55,602,695			$	55,017,075			$	52,075,318
Total average earning assets to total average assets			94	%			94	%			94	%

(1)Includes nonaccrual loans.

(2)Liquidity management assets include investment securities, other securities, interest earning deposits with banks, federal funds sold and securities purchased under resale agreements.

(3)Other earning assets include brokerage customer receivables and trading account securities.

Mortgage loans held-for-sale. Mortgage loans held-for-sale represents such loans awaiting subsequent sale in the secondary market with such sales eliminating the interest-rate risk associated with these loans, as they are predominantly long-term fixed rate loans, and provide a source of non-interest revenue. The increase in average balance from 2023 to 2024 was primarily due to higher mortgage origination production.

Loans, net of unearned income. Growth realized in the combined commercial and commercial real estate loan categories for the first quarter of 2024 as compared to the sequential and prior year periods is primarily attributable to increased business development efforts. The aggregate balances of these loan categories comprised 58%, 57% and 58% of the average loan portfolio in the first quarter of 2024, fourth quarter of 2023 and first quarter of 2023, respectively.

Residential real estate loans averaged $2.7 billion in the first quarter of 2024, and increased $394.7 million, or 17% from the average balance of $2.3 billion in same period of 2023. Additionally, compared to the quarter ended December 31, 2023, the average balance increased $91.3 million, or 14% on an annualized basis. Growth is due to the Company continuing to allocate a portion of its mortgage production for investment instead of for subsequent sale and servicing in the secondary market.

The increase in the premium finance receivables during the first quarter of 2024 compared to the first quarter of 2023 was the result of continued originations within the portfolio due to hardening insurance market conditions driving a higher average size of new property and casualty insurance premium finance receivables as well as effective marketing and customer servicing. Approximately $4.6 billion of premium finance receivables were originated in the first quarter of 2024 compared to $3.8 billion during the same period of 2023. Premium finance receivables consist of a property and casualty portfolio and a life portfolio comprising approximately 46% and 54%, respectively, of the average total balance of premium finance receivables for the first quarter of 2024, and 42% and 58%, respectively, for the first quarter of 2023.

Other loans represent a wide variety of personal and consumer loans to individuals. Consumer loans generally have shorter terms and higher interest rates than mortgage loans but generally involve more credit risk due to the type and nature of the collateral.

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Liquidity management assets. Funds that are not utilized for loan originations are used to purchase investment securities and short term money market investments, to sell as federal funds and to maintain in interest bearing deposits with banks. The balances of these assets can fluctuate based on management’s ongoing effort to manage liquidity and for asset liability management purposes. The Company will continue to prudently evaluate and utilize liquidity sources as needed, including the management of availability with the FHLB and FRB and utilization of the revolving credit facility with unaffiliated banks.

Maturities and Sensitivities of Loans to Changes in Interest Rates

The following table classifies the loan portfolio at March 31, 2024 by date at which the loans reprice or mature, and the type of rate exposure:

As of March 31, 2024	One year or less		From one to five years		From five to fifteen years		After fifteen years
(In thousands)									Total
Commercial
Fixed rate	$	446,377	$	3,035,619	$	1,778,737	$	38,598	$	5,299,331
Variable rate	8,202,814		1,336		—		—		8,204,150
Total commercial	$	8,649,191	$	3,036,955	$	1,778,737	$	38,598	$	13,503,481
Commercial real estate
Fixed rate	507,960		2,472,599		364,499		53,492		3,398,550
Variable rate	8,218,443		16,406		38		—		8,234,887
Total commercial real estate	$	8,726,403	$	2,489,005	$	364,537	$	53,492	$	11,633,437
Home equity
Fixed rate	9,684		3,551		—		26		13,261
Variable rate	327,088		—		—		—		327,088
Total home equity	$	336,772	$	3,551	$	—	$	26	$	340,349
Residential real estate
Fixed rate	19,856		3,515		30,517		1,045,088		1,098,976
Variable rate	79,739		315,526		1,396,025		—		1,791,290
Total residential real estate	$	99,595	$	319,041	$	1,426,542	$	1,045,088	$	2,890,266
Premium finance receivables - property & casualty
Fixed rate	6,827,182		112,837		—		—		6,940,019
Variable rate	—		—		—		—		—
Total premium finance receivables - property & casualty	$	6,827,182	$	112,837	$	—	$	—	$	6,940,019
Premium finance receivables - life insurance
Fixed rate	4,452		594,634		4,000		6,991		610,077
Variable rate	7,261,956		—		—		—		7,261,956
Total premium finance receivables - life insurance	$	7,266,408	$	594,634	$	4,000	$	6,991	$	7,872,033
Consumer and other
Fixed rate	4,139		5,683		9		460		10,291
Variable rate	40,830		—		—		—		40,830
Total consumer and other	$	44,969	$	5,683	$	9	$	460	$	51,121
Total per category
Fixed rate	7,819,650		6,228,438		2,177,762		1,144,655		17,370,505
Variable rate	24,130,870		333,268		1,396,063		—		25,860,201
Total loans, net of unearned income	$	31,950,520	$	6,561,706	$	3,573,825	$	1,144,655	$	43,230,706
Variable Rate Loan Pricing by Index:
SOFR tenors									$	14,880,310
One- year CMT									6,112,917
Prime									3,341,033
Fed Funds									1,039,799
Ameribor tenors									284,141
Other U.S. Treasury tenors									124,941
Other									77,060
Total variable rate									$	25,860,201

SOFR - Secured Overnight Financing Rate.

CMT - Constant Maturity Treasury Rate.

Ameribor - American Interbank Offered Rate.

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CREDIT QUALITY

Commercial and Commercial Real Estate Loan Portfolios

Our commercial and commercial real estate loan portfolios are comprised primarily of lines of credit for working capital purposes and commercial real estate loans. The table below sets forth information regarding the types and amounts of our loans within these portfolios as of March 31, 2024 and 2023:

	As of March 31, 2024						As of March 31, 2023
					Allowance						Allowance
			% of		For Credit				% of		For Credit
			Total		Losses				Total		Losses
(Dollars in thousands)	Balance		Balance		Allocation		Balance		Balance		Allocation
Commercial:
Commercial, industrial, and other	$	13,503,481	53.7	%	$	166,518	$	12,576,985	55.1	%	$	149,501
Commercial Real Estate:
Construction and development	$	2,150,314	8.6	%	$	96,052	$	1,597,053	7.0	%	$	75,069
Non-construction	9,483,123		37.7		130,000		8,642,025		37.9		119,711
Total commercial real estate	$	11,633,437	46.3	%	$	226,052	$	10,239,078	44.9	%	$	194,780
Total commercial and commercial real estate	$	25,136,918	100.0	%	$	392,570	$	22,816,063	100.0	%	$	344,281
Commercial real estate - collateral location by state:
Illinois	$	7,000,471	60.2	%			$	6,626,135	64.7	%
Wisconsin	886,057		7.6				882,547		8.6
Total primary markets	$	7,886,528	67.8	%			$	7,508,682	73.3	%
Indiana	363,600		3.1				343,926		3.4
Florida	357,738		3.1				264,234		2.6
Michigan	257,231		2.2				142,202		1.4
California	254,826		2.2				190,510		1.9
Colorado	249,849		2.1				220,226		2.2
Texas	242,819		2.1				176,364		1.7
Other	2,020,846		17.4				1,392,934		13.5
Total commercial real estate	$	11,633,437	100.0	%			$	10,239,078	100.0	%

We make commercial loans for many purposes, including working capital lines, which are generally renewable annually and supported by business assets, personal guarantees and additional collateral. Such loans may vary in size based on customer need. Primarily as a result of growth in the Company’s commercial loan portfolio our allowance for credit losses in our commercial loan portfolio increased to $166.5 million as of March 31, 2024 compared to $149.5 million as of March 31, 2023.

Our commercial real estate loans are generally secured by a first mortgage lien and assignment of rents on the property. Since most of our bank branches are located in the Chicago metropolitan area and southern Wisconsin, 67.8% of our commercial real estate loan portfolio is located in this region as of March 31, 2024. We have been able to effectively manage our total non-performing commercial real estate loans, aided by our credit management process. As of March 31, 2024, our allowance for credit losses related to this portfolio was $226.1 million compared to $194.8 million as of March 31, 2023. The increase in the allowance for credit losses is primarily a result of growth in our commercial real estate portfolio as well as a deteriorated forecast in the CREPI macroeconomic variable. The table below sets forth the commercial real estate loans by property type and owner vs. non-owner occupied.

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(In thousands)	March 31, 2024										March 31, 2023
Commercial Real Estate:	Owner Occupied		Non-Owner Occupied		Total		% of Total		Average Size of Loan		Owner Occupied		Non-Owner Occupied		Total		% of Total		Average Size of Loan
Residential construction	$	3,192	$	54,366	$	57,558	1	%	$	859	$	2,788	$	67,210	$	69,998	1	%	$	972
Commercial construction	93,090		1,655,517		1,748,607		15		4,150		59,728		1,175,034		1,234,762		12		3,952
Land	9,301		334,848		344,149		3		2,049		10,304		281,989		292,293		3		1,680
Office	269,404		1,297,344		1,566,748		13		1,494		279,449		1,112,591		1,392,040		14		1,311
Industrial	851,109		1,339,091		2,190,200		19		1,668		787,298		1,070,790		1,858,088		18		1,423
Retail	319,387		1,047,028		1,366,415		12		1,209		334,995		974,685		1,309,680		13		1,156
Multi-family	107,976		2,814,456		2,922,432		25		1,249		112,964		2,522,447		2,635,411		26		1,119
Mixed use and other	461,644		975,684		1,437,328		12		1,117		457,185		989,621		1,446,806		14		1,146
Total commercial real estate	$	2,115,103	$	9,518,334	$	11,633,437	100	%	$	1,497	$	2,044,711	$	8,194,367	$	10,239,078	100	%	$	1,334

The Company also participates in mortgage warehouse lending, which is included above within commercial, industrial and other, by providing interim funding to unaffiliated mortgage bankers to finance residential mortgages originated by such bankers for sale into the secondary market. The Company’s loans to the mortgage bankers are secured by the business assets of the mortgage companies as well as the specific mortgage loans funded by the Company, after they have been pre-approved for purchase by third party end lenders. The Company may also provide interim financing for packages of mortgage loans on a bulk basis in circumstances where the mortgage bankers desire to competitively bid on a number of mortgages for sale as a package in the secondary market.

Past Due Loans and Non-Performing Assets

Our ability to manage credit risk depends in large part on our ability to properly identify and manage problem loans. To do so, the Company operates a credit risk rating system under which our credit management personnel assigns a credit risk rating to each loan at the time of origination and review loans on a regular basis to determine each loan’s credit risk rating on a scale of 1 through 10 with higher scores indicating higher risk. Description of the Company’s credit risk rating structure used is included in Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations of the 2023 Form 10-K.

If based on current information and events, it is probable that the Company will be unable to collect all amounts due to it according to the contractual terms of the loan agreement, a loan is individually assessed for measuring the allowance for credit losses and, if necessary, a reserve is established. In determining the appropriate reserve for collateral-dependent loans, the Company considers the results of appraisals for the associated collateral.

Loan Portfolio Aging

As of March 31, 2024, excluding early buy-out loans guaranteed by U.S. government agencies, $94.9 million, or 0.2% of all loans, were 60 to 89 days (or two payments) past due and $296.9 million, or 0.7% of all loans, were 30 to 59 days (or one payment) past due. As of December 31, 2023, excluding early buy-out loans guaranteed by U.S. government agencies, $69.9 million, or 0.2% of all loans, were 60 to 89 days (or two payments) past due and $227.6 million, or 0.5% of all loans, were 30 to 59 days (or one payment) past due. Many of the commercial and commercial real estate loans shown as 60 to 89 days and 30 to 59 days past due are included on the Company’s internal problem loan reporting system. Loans on this system are closely monitored by management on a monthly basis. The Company's home equity and residential loan portfolios continue to exhibit low delinquency ratios. Home equity loans at March 31, 2024 that were current with regard to the contractual terms of the loan agreement represent 99.2% of the total home equity portfolio. Residential real estate loans, excluding early buy-out loans guaranteed by U.S. government agencies, at March 31, 2024 that were current with regards to the contractual terms of the loan agreements comprise 98.5% of total residential real estate loans outstanding. For more information regarding delinquent loans as of March 31, 2024, see Note (7) “Allowance for Credit Losses” in Item 1 of this report.

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Non-performing Assets (1)

The following table sets forth the Company's non-performing assets performing under the contractual terms of the loan agreement as of the dates shown.

(Dollars in thousands)	March 31, 2024			December 31, 2023			March 31, 2023
Loans past due greater than 90 days and still accruing (2):
Commercial	$	27		$	98		$	—
Commercial real estate	—			—			—
Home equity	—			—			—
Residential real estate	—			—			104
Premium finance receivables—property and casualty	25,877			20,135			9,215
Premium finance receivables—life insurance	—			—			1,066
Consumer and other	47			54			87
Total loans past due greater than 90 days and still accruing	25,951			20,287			10,472
Nonaccrual loans:
Commercial	31,740			38,940			47,950
Commercial real estate	39,262			35,459			11,196
Home equity	838			1,341			1,190
Residential real estate	17,901			15,391			11,333
Premium finance receivables—property and casualty	32,648			27,590			18,543
Premium finance receivables—life insurance	—			—			—
Consumer and other	19			22			6
Total nonaccrual loans	122,408			118,743			90,218
Total non-performing loans:
Commercial	31,767			39,038			47,950
Commercial real estate	39,262			35,459			11,196
Home equity	838			1,341			1,190
Residential real estate	17,901			15,391			11,437
Premium finance receivables—property and casualty	58,525			47,725			27,758
Premium finance receivables—life insurance	—			—			1,066
Consumer and other	66			76			93
Total non-performing loans	$	148,359		$	139,030		$	100,690
Other real estate owned	14,538			13,309			9,361
Total non-performing assets	162,897			$	152,339		$	110,051
Total non-performing loans by category as a percent of its own respective category’s period-end balance:
Commercial	0.24		%	0.30		%	0.38		%
Commercial real estate	0.34			0.31			0.11
Home equity	0.25			0.39			0.35
Residential real estate	0.62			0.56			0.46
Premium finance receivables—property and casualty	0.84			0.69			0.48
Premium finance receivables—life insurance	—			—			0.01
Consumer and other	0.13			0.13			0.22
Total non-performing loans	0.34		%	0.33		%	0.25		%
Total non-performing assets, as a percentage of total assets	0.28		%	0.27		%	0.21		%
Total nonaccrual loans as a percentage of total loans	0.28		%	0.28		%	0.23		%
Allowance for credit losses as a percentage of nonaccrual loans	348.98		%	359.82		%	416.54		%

(1)Excludes early buy-out loans guaranteed by U.S. government agencies. Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

At this time, management believes reserves are appropriate to absorb losses that are expected upon the ultimate resolution of these credits. Significant increases may occur in subsequent periods due to ongoing macroeconomic uncertainty and related impacts on borrowers. Management will continue to actively review and monitor its loan portfolios, in an effort to identify problem credits in a timely manner.

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Non-performing Loans Rollforward, excluding early buy-out loans guaranteed by U.S. government agencies

The table below presents a summary of non-performing loans for the periods presented:     

	Three Months Ended
	March 31,		March 31,
(In thousands)	2024		2023
Balance at beginning of period	$	139,030	$	100,697
Additions from becoming non-performing in the respective period	23,142		24,455
Return to performing status	(490)		(480)
Payments received	(8,336)		(5,261)
Transfer to OREO and other repossessed assets	(1,381)		—
Charge-offs	(14,810)		(1,159)
Premium finance receivables	11,204		(17,562)
Balance at end of period	$	148,359	$	100,690

Allowance for Credit Losses

The allowance for credit losses, specifically the allowance for loans losses and the allowance for unfunded commitment losses, represents management’s estimate of lifetime expected credit losses in the loan portfolio. The allowance for credit losses is determined quarterly using a methodology that incorporates important risk characteristics of each loan. A description of how the Company determines the allowance for credit losses is included in Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations of the 2023 Form 10-K.

Management determined that the allowance for credit losses was appropriate at March 31, 2024, and that the loan portfolio is well diversified and well secured, without undue concentration in any specific risk area. While this process involves a high degree of management judgment, the allowance for credit losses is based on a comprehensive, well documented, and consistently applied analysis of the Company’s loan portfolio. This analysis takes into consideration all available information existing as of the financial statement date, including environmental factors such as economic, industry, geographical and political factors, when considered applicable. The relative level of allowance for credit losses is reviewed and compared to industry peers. This review encompasses levels of total non-performing loans, portfolio mix, portfolio concentrations and overall levels of net charge-off. Historical trending of both the Company’s results and the industry peers is also reviewed to analyze comparative significance.

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Allowance for Credit Losses

The following table summarizes the activity in our allowance for credit losses, specifically related to loans and unfunded lending-related commitments, during the periods indicated.

 

	Three Months Ended
(Dollars in thousands)	March 31, 2024			March 31, 2023
Allowance for credit losses at beginning of period	$	427,265		$	357,448
Cumulative effect adjustment from the adoption of ASU 2022-02	—			741
Provision for credit losses	21,691			23,070
Other adjustments	(31)			4
Charge-offs:
Commercial	11,215			2,543
Commercial real estate	5,469			5
Home equity	74			—
Residential real estate	38			—
Premium finance receivables - property & casualty	6,938			4,629
Premium finance receivables - life insurance	—			21
Consumer and other	107			153
Total charge-offs	23,841			7,351
Recoveries:
Commercial	479			392
Commercial real estate	31			100
Home equity	29			35
Residential real estate	2			4
Premium finance receivables - property & casualty	1,519			1,314
Premium finance receivables - life insurance	8			9
Consumer and other	23			32
Total recoveries	2,091			1,886
Net charge-offs	(21,750)			(5,465)
Allowance for credit losses at period end	$	427,175		$	375,798
Annualized net charge-offs by category as a percentage of its own respective category’s average:
Commercial	0.33		%	0.07		%
Commercial real estate	0.19			0.00
Home equity	0.05			(0.04)
Residential real estate	0.01			0.00
Premium finance receivables - property & casualty	0.32			0.23
Premium finance receivables - life insurance	(0.00)			0.00
Consumer and other	0.42			0.74
Total loans, net of unearned income	0.21		%	0.06		%
Loans at period-end	$	43,230,706		$	39,565,471
Allowance for loan losses as a percentage of loans at period end	0.81		%	0.73		%
Allowance for loan and unfunded loan-related commitment losses as a percentage of loans at period end	0.99			0.95

See Note (7) “Allowance for Credit Losses” of the Consolidated Financial Statements presented under Item 1 of this report for further discussion of activity within the allowance for credit losses during the period and the relationship with respective loan balances for each loan category and the total loan portfolio.

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Other Real Estate Owned

In certain circumstances, the Company is required to take action against the real estate collateral of specific loans. The Company uses foreclosure only as a last resort for dealing with borrowers experiencing financial hardships. The Company employs extensive contact and restructuring procedures to attempt to find other solutions for our borrowers. The tables below present a summary of other real estate owned and show the activity for the respective periods and the balance for each property type:

	Three Months Ended
(In thousands)	March 31, 2024		March 31, 2023
Balance at beginning of period	$	13,309	$	9,900
Disposal/resolved	—		(435)
Transfers in at fair value, less costs to sell	1,436		—
Fair value adjustments	(207)		(104)
Balance at end of period	$	14,538	$	9,361

 

	Period End
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
Residential real estate	$	1,146	$	720	$	1,051
Commercial real estate	13,392		12,589		8,310
Total	$	14,538	$	13,309	$	9,361

Deposits

Total deposits at March 31, 2024 were $46.4 billion, an increase of $3.7 billion, or 9%, compared to total deposits at March 31, 2023. See Note (10) “Deposits” to the Consolidated Financial Statements in Item 1 of this report for a summary of period end deposit balances.

The following table sets forth, by category, the maturity of time certificates of deposit as of March 31, 2024:

Time Certificates of Deposit Maturity/Re-pricing Analysis As of March 31, 2024 (Dollars in thousands)	Total Time Certificates of Deposits		Weighted-Average Rate of Maturing Time Certificates of Deposit
1-3 months	$	2,250,084	4.53	%
4-6 months	2,431,414		4.76
7-9 months	1,658,270		4.32
10-12 months	991,137		4.06
13-18 months	438,441		3.71
19-24 months	55,853		2.50
24+ months	69,221		1.78
Total	$	7,894,420	4.42	%

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The following table sets forth, by category, the composition of average deposit balances and the relative percentage of total average deposits for the periods presented:

	Three Months Ended
	March 31, 2024				December 31, 2023				March 31, 2023
(Dollars in thousands)	Balance		Percent		Balance		Percent		Balance		Percent
Non-interest-bearing	$	9,972,646	22	%	$	10,406,585	23	%	$	12,171,631	29	%
NOW and interest-bearing demand deposits	5,680,265		13		5,868,976		13		5,271,740		13
Wealth management deposits	1,510,203		3		1,704,099		4		2,167,081		5
Money market	14,474,492		33		14,212,320		32		12,533,468		30
Savings	5,792,118		13		5,676,155		13		4,830,322		11
Time certificates of deposit	7,148,456		16		6,645,980		15		5,041,638		12
Total average deposits	$	44,578,180	100	%	$	44,514,115	100	%	$	42,015,880	100	%

Total average deposits for the first quarter of 2024 were $44.6 billion, an increase of $2.6 billion, or 6%, from the first quarter of 2023. Total deposits increased in the first quarter as the Company increased marketing efforts to retain and attract deposits to support continued loan growth. Additionally, the diversity of our deposit base showed its resilience in a volatile market. The Company has experienced a change in the mix of deposits as non-interest bearing deposits have migrated to interest-bearing products.

Wealth management deposits are funds from the brokerage customers of Wintrust Investments, CDEC and trust and asset management customers of the Company which have been placed into deposit accounts of the banks (“wealth management deposits” in the table above). Wealth Management deposits consist primarily of money market accounts. Consistent with reasonable interest rate risk parameters, these funds have generally been invested in loan production of the banks as well as other investments suitable for banks.

Brokered Deposits

While the Company obtains a portion of its total deposits through brokered deposits, the Company does so primarily as an asset-liability management tool to assist in the management of interest rate risk, and the Company does not consider brokered deposits to be a vital component of its current liquidity resources. Historically, brokered deposits have represented a small component of the Company’s total deposits outstanding, as set forth in the table below:

	March 31,						December 31,
(Dollars in thousands)	2024			2023			2023			2022			2021
Total deposits	$	46,448,858		$	42,718,211		$	45,397,170		$	42,902,544		$	42,095,585
Brokered deposits	4,570,221			4,015,271			4,216,718			3,174,093			1,591,083
Brokered deposits as a percentage of total deposits	9.8		%	9.4		%	9.3		%	7.4		%	3.8		%

Brokered deposits include certificates of deposit obtained through deposit brokers, deposits received through the Certificate of Deposit Account Registry Program, and certain deposits of brokerage customers from unaffiliated companies which have been placed into deposit accounts of the banks.

Other Funding Sources

Although deposits are the Company’s primary source of funding its interest-earning assets, the Company’s ability to manage the types and terms of deposits is somewhat limited by customer preferences and market competition. As a result, in addition to deposits and the issuance of equity securities and the retention of earnings, the Company uses several other funding sources to support its growth. These sources include FHLB advances, notes payable, short-term borrowings, secured borrowings, subordinated debt and junior subordinated debentures. The Company evaluates the terms and unique characteristics of each source, as well as its asset-liability management position, in determining the use of such funding sources.

Uninsured deposits are estimated based on the methodologies and assumptions used for the Company’s regulatory reporting requirements. In accordance with the instructions described in the FDIC’s July 24, 2023 Financial Institution Letter: Estimated Uninsured Deposits Reporting Expectations, the Company had approximately $14.9 billion of uninsured deposits as of March 31, 2024 of which $2.5 billion were fully collateralized deposits. The net position of $12.4 billion of uninsured and

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uncollateralized deposits represents approximately 27% of total deposits as of March 31, 2024. The Company had total liquidity sources, including cash and collateralized funding sources of $14.9 billion or approximately 120% of uninsured and uncollateralized deposits as of March 31, 2024.

The following table sets forth, by category, the composition of the average balances of other funding sources for the quarterly periods presented:

	Three Months Ended
	March 31,		December 31,		March 31,
(In thousands)	2024		2023		2023
FHLB advances	$	2,728,849	$	2,326,073	$	2,474,882
Other borrowings:
Notes payable	171,049		178,181		199,717
Short-term borrowings	24,396		12,472		22,840
Secured borrowings	373,403		383,643		319,453
Other	58,863		59,377		60,927
Total other borrowings	$	627,711	$	633,673	$	602,937
Subordinated notes	437,893		437,785		437,422
Junior subordinated debentures	253,566		253,566		253,566
Total other funding sources	$	4,048,019	$	3,651,097	$	3,768,807

See Note (11) “FHLB Advances, Other Borrowings and Subordinated Notes” and Note (12) “Junior Subordinated Debentures” of the Consolidated Financial Statements presented under Item 1 of this report for details of period end balances and other information for these various funding sources. The Company hereby incorporates by reference Note (11) and Note (12) of the Consolidated Financial Statements presented under Item 1 of this report in its entirety.

Shareholders’ Equity

The following tables reflect various consolidated measures of capital as of the dates presented and the capital guidelines established for a bank holding company:

	March 31, 2024		December 31, 2023		March 31, 2023
Tier 1 leverage ratio	9.4	%	9.3	%	9.1	%
Risk-based capital ratios:
Tier 1 capital ratio	10.3		10.3		10.1
Common equity tier 1 capital ratio	9.5		9.4		9.2
Total capital ratio	12.2		12.1		12.1
Other ratio:
Total average equity-to-total average assets(1)	9.8		9.2		9.4

(1)Based on quarterly average balances.

	Minimum Capital Requirements		Minimum Ratio + Capital Conservation Buffer(1)	Minimum Well Capitalized(2)
Tier 1 leverage ratio	4.0	%	N/A	N/A
Risk-based capital ratios:
Tier 1 capital ratio	6.0		8.5	6.0
Common equity tier 1 capital ratio	4.5		7.0	N/A
Total capital ratio	8.0		10.5	10.0

(1)Reflects the Capital Conservation Buffer of 2.5%.

(2)Reflects the well-capitalized standard applicable to the Company for purposes of the Federal Reserve’s Regulation Y. The Federal Reserve has not yet revised the well-capitalized standard for bank holding companies (“BHCs”) to reflect the higher capital requirements imposed under the U.S. Basel III Rule or to add Common Equity Tier 1 capital ratio and Tier 1

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leverage ratio requirements to this standard. As a result, the Common Equity Tier 1 capital ratio and Tier 1 leverage ratio are denoted as “N/A” in this column. If the Federal Reserve were to apply the same or a very similar well-capitalized standard to BHCs as the standard applicable to our subsidiary banks, we believe the Company’s capital ratios as of March 31, 2024 would exceed such revised well-capitalized standard.

The Company’s principal sources of funds at the holding company level are dividends from its subsidiaries, borrowings under its loan agreement with unaffiliated banks and proceeds from the issuances of subordinated debt and additional equity. Refer to Notes (11) and (12) of the Consolidated Financial Statements in Item 1 for further information on these various funding sources. See Note (23) “Shareholders’ Equity” of the Consolidated Financial Statements presented under Item 7 of the 2023 Form 10-K for details on the Company’s issuance of Series D Preferred Stock in June 2015, Series E Preferred Stock and associated Depositary Shares in May 2020 and additional common stock offering in June 2022.

The Board of Directors approves dividends from time to time, however, the ability to declare a dividend is limited by the Company’s financial condition, the terms of the Company’s Series D and Series E Preferred Stock, the terms of the Company’s Trust Preferred Securities offerings and under certain financial covenants in the Company’s revolving and term facilities. In January of 2024, the Company declared a quarterly cash dividend of $0.45 per common share. In January, April, July and October of 2023, the Company declared a quarterly cash dividend of $0.40 per common share.

The Company continues to leverage its capital management framework to assess and monitor risk when making capital decisions. Management is committed to maintaining the Company’s capital levels above the “Well Capitalized” levels established by the FRB for bank holding companies.

Announced Acquisition

On April 15, 2024, the Company announced the signing of a definitive agreement to acquire Macatawa Bank Corporation (“Macatawa”). Macatawa offers a full range of banking, retail and commercial lending, wealth management and ecommerce services to individuals, businesses and governmental entities from a network of 26 full-service branches located throughout communities in Kent, Ottawa and northern Allegan counties in the state of Michigan. As of December 31, 2023, Macatawa had approximately $2.7 billion in assets, $2.4 billion in deposits and $1.3 billion in loans.

LIQUIDITY

The Company manages the liquidity position of its banking operations to ensure that sufficient funds are available to meet customers’ needs for loans and deposit withdrawals. The management process includes the utilization of stress testing processes and other aspects of the Company's liquidity management framework to assess and monitor risk, and inform decision making. The liquidity to meet the demands of customers is provided by maturing assets, liquid assets that can be converted to cash and the ability to attract funds from external sources. Liquid assets refer to money market assets such as Federal funds sold and interest-bearing deposits with banks, as well as available-for-sale debt securities and equity securities with readily determinable fair values which are not pledged to secure public funds. In addition, trade date receivables represent certain sales or calls of available-for-sale securities that await cash settlement, typically in the month following the trade date.

In addition to the liquidity management noted above, in the third quarter of 2023, the Company completed a loan sale transaction within our property and casualty insurance premium finance receivables portfolio which demonstrated that our premium finance portfolio is a strong source of additional liquidity if needed and demonstrated the flexibility to continue to manage our balance sheet effectively. Net proceeds to the Company totaled approximately $405.6 million and a gain on the sale was recorded for approximately $890,000. We maintain our liquid assets to ensure that we would have the balance sheet strength to serve our clients. As a result, the Company believes that it has sufficient funds and access to funds to effectively meet its working capital and other needs. The Company will continue to prudently evaluate liquidity sources, including the management of availability with the FHLB and FRB and utilization of the revolving credit facility with unaffiliated banks. Please refer to Management’s Discussion and Analysis of Financial Condition and Results of Operation -Interest-Earning Assets, -Deposits, -Other Funding Sources and -Shareholders’ Equity sections of this report for additional information regarding the Company’s liquidity position.

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INFLATION

A banking organization’s assets and liabilities are primarily monetary. Changes in the rate of inflation typically do not have as great an impact on the financial condition of a bank as do changes in interest rates. Moreover, interest rates do not necessarily change at the same percentage as inflation. Accordingly, changes in inflation are not expected to have as material an impact on the Company’s business as entities operating in other industries. An analysis of the Company’s asset and liability structure provides the best indication of how the organization is positioned to respond to changing interest rates. See “Quantitative and Qualitative Disclosures About Market Risk” section of this report for additional information.

FORWARD-LOOKING STATEMENTS

This document contains forward-looking statements within the meaning of federal securities laws. Forward-looking information can be identified through the use of words such as “intend,” “plan,” “project,” “expect,” “anticipate,” “believe,” “estimate,” “contemplate,” “possible,” “will,” “may,” “should,” “would” and “could.” Forward-looking statements and information are not historical facts, are premised on many factors and assumptions, and represent only management’s expectations, estimates and projections regarding future events. Similarly, these statements are not guarantees of future performance and involve certain risks and uncertainties that are difficult to predict, and which may include, but are not limited to, those listed below and the Risk Factors discussed under Item 1A of the Company’s 2023 Annual Report on Form 10-K and in any of the Company’s subsequent SEC filings. The Company intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, and is including this statement for purposes of invoking these safe harbor provisions. Such forward-looking statements may be deemed to include, among other things, statements relating to the Company’s future financial performance, the performance of its loan portfolio, the expected amount of future credit reserves and charge-offs, delinquency trends, growth plans, regulatory developments, securities that the Company may offer from time to time, and plans to form additional de novo banks or branch offices, and management’s long-term performance goals, as well as statements relating to the anticipated effects on the Company’s financial condition and results of operations from expected developments or events, the Company’s business and growth strategies, including future acquisitions of banks, specialty finance or wealth management businesses, internal growth and plans to form additional de novo banks or branch offices. Actual results could differ materially from those addressed in the forward-looking statements as a result of numerous factors, including the following:

•economic conditions and events that affect the economy, housing prices, the job market and other factors that may adversely affect the Company’s liquidity and the performance of its loan portfolios, including an actual or threatened U.S. government debt default or rating downgrade, particularly in the markets in which it operates;

•negative effects suffered by us or our customers resulting from changes in U.S. trade policies;

•the extent of defaults and losses on the Company’s loan portfolio, which may require further increases in its allowance for credit losses;

•estimates of fair value of certain of the Company’s assets and liabilities, which could change in value significantly from period to period;

•the financial success and economic viability of the borrowers of our commercial loans;

•commercial real estate market conditions in the Chicago metropolitan area and southern Wisconsin;

•the extent of commercial and consumer delinquencies and declines in real estate values, which may require further increases in the Company’s allowance for credit losses;

•inaccurate assumptions in our analytical and forecasting models used to manage our loan portfolio;

•changes in the level and volatility of interest rates, the capital markets and other market indices that may affect, among other things, the Company’s liquidity and the value of its assets and liabilities;

•the interest rate environment, including a prolonged period of low interest rates or rising interest rates, either broadly or for some types of instruments, which may affect the Company’s net interest income and net interest margin, and which could materially adversely affect the Company’s profitability;

•competitive pressures in the financial services business which may affect the pricing of the Company’s loan and deposit products as well as its services (including wealth management services), which may result in loss of market share and reduced income from deposits, loans, advisory fees and income from other products;

•failure to identify and complete favorable acquisitions in the future or unexpected losses, difficulties or developments related to the Company’s recent or future acquisitions;

•unexpected difficulties and losses related to FDIC-assisted acquisitions;

•harm to the Company’s reputation;

•any negative perception of the Company’s financial strength;

•ability of the Company to raise additional capital on acceptable terms when needed;

•disruption in capital markets, which may lower fair values for the Company’s investment portfolio;

•ability of the Company to use technology to provide products and services that will satisfy customer demands and create

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efficiencies in operations and to manage risks associated therewith;

•failure or breaches of our security systems or infrastructure, or those of third parties;

•security breaches, including denial of service attacks, hacking, social engineering attacks, malware intrusion and similar events or data corruption attempts and identity theft;

•adverse effects on our information technology systems, or those of third parties, resulting from failures, human error or cyberattacks (including ransomware);

•adverse effects of failures by our vendors to provide agreed upon services in the manner and at the cost agreed, particularly our information technology vendors;

•increased costs as a result of protecting our customers from the impact of stolen debit card information;

•accuracy and completeness of information the Company receives about customers and counterparties to make credit decisions;

•ability of the Company to attract and retain senior management experienced in the banking and financial services industries, and ability of the Company to effectively manage the transition of the chief executive officer role;

•environmental liability risk associated with lending activities;

•the impact of any claims or legal actions to which the Company is subject, including any effect on our reputation;

•losses incurred in connection with repurchases and indemnification payments related to mortgages and increases in reserves associated therewith;

•the loss of customers as a result of technological changes allowing consumers to complete their financial transactions without the use of a bank;

•the soundness of other financial institutions and the impact of recent failures of financial institutions, including broader financial institution liquidity risk and concerns;

•the expenses and delayed returns inherent in opening new branches and de novo banks;

•liabilities, potential customer loss or reputational harm related to closings of existing branches;

•examinations and challenges by tax authorities, and any unanticipated impact of the Tax Act;

•changes in accounting standards, rules and interpretations, and the impact on the Company’s financial statements;

•the ability of the Company to receive dividends from its subsidiaries;

•the impact of the Company’s transition from LIBOR to an alternative benchmark rate for current and future transactions;

•a decrease in the Company’s capital ratios, including as a result of declines in the value of its loan portfolios, or otherwise;

•legislative or regulatory changes, particularly changes in regulation of financial services companies and/or the products and services offered by financial services companies;

•changes in laws, regulations, rules, standards and contractual obligations regarding data privacy and cybersecurity;

•a lowering of our credit rating;

•changes in U.S. monetary policy and changes to the Federal Reserve’s balance sheet, including changes in response to persistent inflation or otherwise;

•regulatory restrictions upon our ability to market our products to consumers and limitations on our ability to profitably operate our mortgage business;

•increased costs of compliance, heightened regulatory capital requirements and other risks associated with changes in regulation and the regulatory environment;

•the impact of heightened capital requirements;

•increases in the Company’s FDIC insurance premiums, or the collection of special assessments by the FDIC;

•delinquencies or fraud with respect to the Company’s premium finance business;

•credit downgrades among commercial and life insurance providers that could negatively affect the value of collateral securing the Company’s premium finance loans;

•the Company’s ability to comply with covenants under its credit facility;

•fluctuations in the stock market, which may have an adverse impact on the Company’s wealth management business and brokerage operation;

•widespread outages of operational, communication, or other systems, whether internal or provided by third parties, natural or other disasters (including acts of terrorism, armed hostilities and pandemics), and the effects of climate change; and

•the severity, magnitude and duration of the COVID-19 pandemic, including the continued emergence of variant strains, and the direct and indirect impact of such pandemic, as well as responses to the pandemic by the government, businesses and consumers, on the economy, our financial results, operations and personnel, commercial activity and demand across our business and our customers’ businesses.

Therefore, there can be no assurances that future actual results will correspond to these forward-looking statements. The reader is cautioned not to place undue reliance on any forward-looking statement made by the Company. Any such statement speaks only as of the date the statement was made or as of such date that may be referenced within the statement. The Company undertakes no obligation to update any forward-looking statement to reflect the impact of circumstances or events after the date of this report. Persons are advised, however, to consult further disclosures management makes on related subjects in its reports filed with the Securities and Exchange Commission and in its press releases.

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ITEM 3

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As an ongoing part of its financial strategy, the Company attempts to manage the impact of fluctuations in market interest rates on net interest income. This effort entails providing a reasonable balance between interest rate risk, credit risk, liquidity risk and maintenance of yield. Asset-liability management policies are established and monitored by management in conjunction with the boards of directors of the banks, subject to general oversight by the Risk Management Committee of the Board of Directors. The policies establish guidelines for acceptable limits on the sensitivity of the market value of assets and liabilities to changes in interest rates.

Interest rate risk arises when the maturity or re-pricing periods and interest rate indices of the interest-earning assets, interest-bearing liabilities, and derivative financial instruments are different. It is the risk that changes in the level of market interest rates will result in disproportionate changes in the value of, and the net earnings generated from, the Company’s interest-earning assets, interest-bearing liabilities and derivative financial instruments. The Company continuously monitors not only the organization’s current net interest margin, but also the historical trends of these margins. In addition, management attempts to identify potential adverse changes in net interest income in future years as a result of interest rate fluctuations by performing simulation analysis of various interest rate environments. If a potential adverse change in net interest margin and/or net income is identified, management would take appropriate actions with its asset-liability structure to mitigate these potentially adverse situations.

Since the Company’s primary source of interest-bearing liabilities is from customer deposits, the Company’s ability to manage the types and terms of such deposits is somewhat limited by customer preferences and local competition in the market areas in which the banks operate. The rates, terms and interest rate indices of the Company’s interest-earning assets result primarily from the Company’s strategy of investing in loans and securities that permit the Company to limit its exposure to interest rate risk, together with credit risk, while at the same time achieving an acceptable interest rate spread.

The Company’s exposure to interest rate risk is reviewed on a regular basis by management and the Risk Management Committees of the boards of directors of the banks and the Company. The objective of the review is to measure the effect on net income and to adjust balance sheet and derivative financial instruments to minimize the inherent risk while at the same time maximizing net interest income.

The following interest rate scenarios display the percentage change in net interest income over a one-year time horizon assuming increases and decreases of 100 and 200 basis points. The Static Shock Scenario results incorporate actual cash flows and repricing characteristics for balance sheet instruments following an instantaneous, parallel change in market rates based upon a static (i.e. no growth or constant) balance sheet. Conversely, the Ramp Scenario results incorporate management’s projections of future volume and pricing of each of the product lines following a gradual, parallel change in market rates over twelve months. Actual results may differ from these simulated results due to timing, magnitude, and frequency of interest rate changes as well as changes in market conditions and management strategies. The interest rate sensitivity for both the Static Shock and Ramp Scenarios at March 31, 2024, December 31, 2023 and March 31, 2023 is as follows:

Static Shock Scenarios	+200 Basis Points		+100 Basis Points		-100 Basis Points		-200 Basis Points
March 31, 2024	1.9	%	1.4	%	1.5	%	1.6	%
December 31, 2023	2.6		1.8		0.4		(0.7)	%
March 31, 2023	4.2		2.4		(2.4)		(7.3)	%

Ramp Scenarios	+200 Basis Points		+100 Basis Points		-100 Basis Points		-200 Basis Points
March 31, 2024	0.8	%	0.6	%	1.3	%	2.0	%
December 31, 2023	1.6		1.2		(0.3)		(1.5)	%
March 31, 2023	3.0		1.7		(1.3)		(3.4)	%

One method utilized by financial institutions, including the Company, to manage interest rate risk is to enter into derivative financial instruments. Derivative financial instruments include interest rate swaps, interest rate caps, floors and collars, futures,

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forwards, option contracts and other financial instruments with similar characteristics. Additionally, the Company enters into commitments to fund certain mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of mortgage loans to third party investors. See Note (14) “Derivative Financial Instruments” of the Consolidated Financial Statements in Item 1 of this report for further information on the Company’s derivative financial instruments.

As shown above, the magnitude of potential changes in net interest income in various interest rate scenarios has continued to diminish. Given the recent unprecedented rise in interest rates, the Company has made a conscious effort to reposition its exposure to changing interest rates given the uncertainty of the future interest rate environment. To this end, management has executed various derivative instruments including collars and receive fixed swaps to hedge variable rate loan exposures and originated a higher percentage of its loan originations in longer term fixed rate loans. The Company will continue to monitor current and projected interest rates and expects to execute additional derivatives to mitigate potential fluctuations in net interest margin in future years.

Periodically, the Company enters into certain covered call option transactions related to certain securities held by the Company. The Company uses these option transactions (rather than entering into other derivative interest rate contracts, such as interest rate floors) to economically hedge positions and compensate for net interest margin compression by increasing the total return associated with the related securities through fees generated from these options. Although the revenue received from these options is recorded as non-interest income rather than interest income, the increased return attributable to the related securities from these options contributes to the Company’s overall profitability. The Company’s exposure to interest rate risk may be impacted by these transactions. To further mitigate this risk, the Company may acquire fixed rate term debt or use financial derivative instruments. There were no covered call options outstanding as of March 31, 2024 and March 31, 2023. See Note (14) “Derivative Financial Instruments” of the Consolidated Financial Statements in Item 1 of this report for further information on the Company’s fees from covered call options for the three months ended March 31, 2024 and March 31, 2023.

ITEM 4

CONTROLS AND PROCEDURES

As of the end of the period covered by this report, management of the Company, under the supervision and with the participation of the Chief Executive Officer and Chief Financial Officer, carried out an evaluation of the effectiveness of the design and operation of the Company’s disclosure controls and procedures as defined under Rules 13a-15(e) and 15d-15(e) of the Exchange Act. Based upon, and as of the date of that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures were effective, in ensuring the information relating to the Company (and its consolidated subsidiaries) required to be disclosed by the Company in the reports it files or submits under the Exchange Act was recorded, processed, summarized and reported in a timely manner.

There were no changes in the Company’s internal control over financial reporting (as defined in Exchange Act Rule 13a-15(f)) during the period that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.

PART II —

Item 1: Legal Proceedings

In accordance with applicable accounting principles, the Company establishes an accrued liability for litigation and threatened litigation actions and proceedings when those actions present loss contingencies, which are both probable and estimable. In actions for which a loss is reasonably possible in future periods, the Company determines whether it can estimate a loss or range of possible loss. To determine whether a possible loss is estimable, the Company reviews and evaluates its material litigation on an ongoing basis, in conjunction with any outside counsel handling the matter, in light of potentially relevant factual and legal developments. This review may include information learned through the discovery process, rulings on substantive or dispositive motions, and settlement discussions.

Wintrust Mortgage California PAGA Matter

On May 24, 2022, a former Wintrust Mortgage employee filed a California Private Attorney General Act (“PAGA”) suit, not individually, but as representative of all Wintrust Mortgage’s California hourly employees, against Wintrust Mortgage in the Superior Court of San Diego County, California. Plaintiff alleges Wintrust Mortgage failed to provide: (i) accurate sick leave accrual and pay; (ii) overtime wages; (iii) accurately itemized wage statements; (iv) meal breaks and meal premiums; (v) timely payment of earned wages; (vi) payment of all earned wages; and (vii) payment of all vested vacation hours. Wintrust Mortgage disputes the validity of Plaintiff’s claims and believes, to the extent there were defects in complying with California law

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governing the payment of compensation to Plaintiff, such errors would have been de minimis. Plaintiff also has an arbitration agreement with a collective and class action waiver and on January 19, 2023, Wintrust Mortgage moved to compel arbitration. The court has stayed litigation pending mediation, which will occur on May 13, 2024. We dispute plaintiff’s allegations and otherwise lack sufficient information to estimate the amount of any potential liability. We plan to vigorously defend ourselves against the claims brought by the plaintiff in this matter.

Wintrust Mortgage Fair Lending Matter

On May 25, 2022, a Wintrust Mortgage customer filed a putative class action and asserted individual claims against Wintrust Mortgage and Wintrust Financial Corporation in the District Court for the Northern District of Illinois. Plaintiff alleges that Wintrust Mortgage discriminated against black/African American borrowers and brings class claims under the Equal Credit Opportunity Act, Sections 1981 and 1982 under Chapter 42 of the United States Code; and the Fair Housing Act of 1968. Plaintiff also asserts individual claims under theories of promissory estoppel, fraudulent inducement, and breach of contract. On September 23, 2022, Wintrust filed a motion to dismiss the entire suit and the court granted that motion to dismiss on September 27, 2023, giving Plaintiff until October 20, 2023 to file an amended complaint. Plaintiff timely filed an amended complaint. On November 21, 2023, Wintrust filed its motion to dismiss the amended complaint. Wintrust vigorously disputes these allegations, and Wintrust otherwise lacks sufficient information to estimate the amount of any potential liability.

Wintrust Financial ERISA Matter

On July 29, 2022, a former Wintrust employee filed a class action in the District Court for the Northern District of Illinois asserting claims under the federal Employee Retirement Income Security Act (“ERISA”) against Wintrust Financial Corporation. Plaintiff alleges Wintrust breached its fiduciary duty in the selection of BlackRock Target Date funds for inclusion in its 401(k) plan, that Wintrust failed to monitor the performance of those funds, and in the alternative, Wintrust should be liable for breach of trust. Plaintiff’s sole basis for the allegations is that BlackRock Target Date funds allegedly performed more poorly than two comparable funds over a three-year period. Wintrust is one of several public companies that were sued on identical grounds within the same week by the same plaintiff’s law firm. On November 8, 2022, Wintrust filed a motion to dismiss the entire complaint. On July 14, 2023, the District Court granted Wintrust’s motion to dismiss and gave Plaintiff until August 2, 2023 to file an amended complaint. Plaintiff timely filed an amended complaint which Wintrust moved to dismiss on September 14, 2023. Wintrust vigorously disputes plaintiff’s allegations, and otherwise lacks sufficient information to estimate the amount of any potential liability.

Other Matters

In addition, the Company and its subsidiaries, from time to time, are subject to pending and threatened legal action and proceedings arising in the ordinary course of business.

Based on information currently available and upon consultation with counsel, management believes that the eventual outcome of any pending or threatened legal actions and proceedings described above, including our ordinary course litigation, will not have a material adverse effect on the operations or financial condition of the Company. However, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the results of operations or financial condition for a particular period.

Item 1A: Risk Factors

There have been no material changes from the risk factors set forth under Part I, Item 1A “Risk Factors” in the 2023 Form 10-K.

Item 2: Unregistered Sales of Equity Securities, Use of Proceeds and Issuer Purchases of Equity Securities

No purchases of the Company’s common shares were made by or on behalf of the Company or any “affiliated purchaser” as defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934, as amended, during the three months ended March 31, 2024.

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Item 5: Other Information

Securities Trading Plans of Directors and Officers

During the three months ended March 31, 2024, none of our directors or officers adopted or terminated a Rule 10b5-1 trading plan or adopted or terminated a non-Rule 10b5-1 trading arrangement (as each term is defined in Item 408(a) of Regulation S-K).

Item 6: Exhibits:

(a)Exhibits

Exhibits marked with a “*” denote management contracts or compensatory plans or arrangements.

10.1	Employment Agreement dated as of September 8, 2015 between Wintrust Financial Corporation and Kathleen M. Boege. *
10.2	Agreement and Plan of Merger, by and among Wintrust Financial Corporation, Leo Subsidiary LLC and Macatawa Bank Corporation, dated April 15, 2024. (The schedules to the Agreement and Plan of Merger have been omitted. The registrant hereby agrees to furnish supplementally a copy of any omitted schedules to the SEC upon request.) (incorporated by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on April 15, 2024).
10.3	Form of Voting and Support Agreement (incorporated by reference to Exhibit 99.1 of the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on April 15, 2024).
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of 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.
101.INS	The XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document (1)
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

(1)Includes the following financial information included in the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024, formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) the Consolidated Statements of Condition, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Changes in Shareholders’ Equity, (v) the Consolidated Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements

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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, thereunto duly authorized.

		WINTRUST FINANCIAL CORPORATION (Registrant)
Date:	May 9, 2024	/s/ DAVID L. STOEHR
		David L. Stoehr
		Executive Vice President and Chief Financial Officer (Principal Financial Officer and duly authorized officer)

Date:	May 9, 2024	/s/ JEFFREY D. HAHNFELD
		Jeffrey D. Hahnfeld
		Executive Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer and duly authorized officer)

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EX-10.1

EMPLOYMENT AGREEMENT

This Employment Agreement (the "Agreement") is made by and between Wintrust Financial Corporation ("Employer" or "Wintrust"), an Illinois bank holding company, and Kathleen M. Boege,an individual resident in the State of Illinois

("Executive") as of September 8, 2015.

WITNESSETH THAT:

WHEREAS, Employer is engaged in the business of general banking;

WHEREAS, Executive has particular expertise and knowledge concerning the business of Employer and expects Executive to be a valued member of Employer's senior management;

WHEREAS, by virtue of Executive's employment with Employer, Executive will become acquainted with certain confidential information regarding the services, customers, methods of doing business, strategic plans, marketing, and other aspects of the business of Employer or its Affiliates;

WHEREAS, Employer and Executive desire to state and set forth in this Agreement the terms, conditions and obligations of the parties with respect to such employment effective as of the date first written above (the "Effective Date") and this Agreement is intended by the parties to supersede all previous agreements and understanding, whether written or oral, concerning such employment.

NOW THEREFORE, in consideration of the covenants and agreements contained herein, of Executive's employment, of the compensation to be paid by Employer for Executive's services, and of Employer's other undertakings in this Agreement, the parties hereto do hereby agree as follows:

1.Scope of Employment. Executive will be employed as Executive Vice President, General Counsel & Corporate Secretary of Employer and shall perform such duties as may be assigned to Executive by the Chief Executive Officer and/or the Board of Directors of Employer in such position. Executive agrees that during Executive's employment Executive will be subject to and abide by the written policies and practices of Employer. Executive also agrees to assume such new or additional positions and responsibilities as Executive may from time to time be assigned for or on behalf of Employer or any Affiliate of Wintrust. Notwithstanding the foregoing, during the Term (as defined in Section 8 herein) of this Agreement, Executive will not be required without Executive's consent to move Executive's principal business location to another location more than a 35 mile radius from Executive's principal business location. For purposes of this Agreement, the term "Affiliate" shall include but not be limited to the entities listed in Exhibit A to this Agreement and any subsidiary of any of such entities and shall further include any present or future affiliate of any of them as defined by the rules and regulations of

the Federal Reserve Board. In the event Executive shall perform services for Wintrust or any Affiliate in addition to serving as EVP, General Counsel & Corporate Secretary of Employer, the provisions of this Agreement shall also apply to the performance of such services by Executive on behalf of Wintrust or any Affiliate.

2. Compensation and Benefits. Executive will be paid such base salary as may from time to time be agreed upon between Executive and Employer. Executive will be entitled to coverage under such compensation plans, insurance plans and other fringe benefit plans and programs as may from time to time be established for employees of Wintrust and its Affiliates in accordance with the terms and conditions of such plans and programs. Executive shall also be eligible to participate in the Wintrust 2015 Stock Incentive Plan or any successor Plan thereto.

3.Extent of Service. Executive shall devote Executive's entire time, attention and energies to the business of Employer during the Term of this Agreement; but this shall not be construed as preventing Executive from (a) investing Executive's personal assets in such form or manner as will not require any services on the part of Executive in the operation or the affairs of the corporations, partnerships and other entities in which such investments are made and in which Executive's participation is solely that of an investor (subject to any and all rules and regulations of applicable banking regulators or policies of the Employer governing transactions with affiliates and ownership interests in customers); (b) engaging (whether or not during normal business hours) in any other business, professional or civic activities provided that the Board of Directors of Employer approves of such activities and Executive's engagement does not result in a violation of Executive's covenants under this Section or Sections 4 or 5 hereof; or (c) accepting appointments to the boards of directors of other companies provided that the Board of Directors of Employer approves of such appointments and Executive's performance of Executive's duties on such boards does not result in a violation of Executive's covenants under this Section or Sections 4 and 5 hereof.

4. Competition.Other than in connection with Executive's performance of Executive's duties hereunder, during the period in which Executive performs services for Employer and for a period of three years after termination of Executive's employment with Employer, regardless of the reason, Executive shall not directly or indirectly, either alone or in conjunction with any other person, firm, association, company or corporation:

(a)    serve as an owner, principal, senior manager, or in a position comparable to that held by Executive at any time during Executive's employment with Employer, for a bank or other financial institution (or any branch or affiliate thereof) which offers to its customers commercial and community banking and/or trust and investment services, and which is located within ten miles of the principal office or any branch office of the Employer;

(b)    solicit or conduct business which involves commercial and community banking and/or trust and investment services with any person, corporation or other entity which was (i) a

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customer of the Employer or any other Affiliate of Wintrust with whom Executive had direct or indirect contact while employed by Employer or about whom Executive obtained Confidential Information during the fifteen months prior to the termination of Executive's employment with Employer, or (ii) a potential customer with whom Employer or any Affiliate has, at the time of Executive's termination of employment with Employer, an outstanding oral or written proposal to provide commercial and community banking and/or trust and investment services and with whom Executive had direct or indirect contact while employed by Employer;

(c)    request, advise or directly or indirectly invite any of the existing customers, suppliers or service providers of Employer or any other Affiliate of Wintrust to withdraw, curtail or cancel its business with Employer or any other Affiliate of Wintrust, other than through mass mailings or general advertisements not specifically directed at customers of Employer or any Affiliate;

(d)    hire, solicit, induce or attempt to solicit or induce any employee, consultant, or agent of Employer or any other Affiliate of Wintrust (i) to terminate his employment or association with Employer or (ii) to become employed by or serve in any capacity by a bank or other financial institution which operates or is planned to operate at any facility which is located within a ten mile radius of the principal office or any branch office of the Employer; or

(e)    in any way participate in planning or opening a bank or other financial institution which is located or will be located within a ten mile radius of the principal office or any branch office of the Employer. For the purposes of this Agreement, in the event Executive's geographic area of responsibility as specified herein shall change during employment with Employer, or as the result of performing services for Wintrust or any Affiliate of Wintrust, the Executive's obligation stated in Sections 4(a), 4(d)(ii) and 4(e) shall apply to a ten mile radius of Executive's revised geographic area of responsibility.

Notwithstanding the foregoing, (a) Executive shall not be prevented from: (i) investing or owning shares of stock of any corporation engaged in any business provided that such shares are regularly traded on a national securities exchange or any over-the-counter market; (ii) retaining any shares of stock in any corporation which Executive owned prior to the date of Executive's employment with Employer (subject to any and all rules and regulations of applicable banking regulators or policies of the Employer governing transactions with affiliates and ownership interests in customers); or (iii) investing as a limited partner (without decision-making authority) in any private equity fund, provided that Executive's involvement in such investment is solely that of a passive investor (subject to any and all rules and regulations of applicable banking regulators or policies of the Employer governing transactions with affiliates and ownership

interests in customers), and (b) Executive shall not be in violation of Sections 4(a) or 4(e) of this Agreement if, during the three-year period following termination of employment Executive accepts employment or invests in a bank or other financial institution which is within a 10 mile radius of the principal offices or any branch office of Wintrust or any Affiliate of Wintrust (other

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than Employer) as long as such facility is not within a ten mile radius of the principal office of the Employer.

5. Confidential Information. Executive acknowledges that, during Executive's employment with Employer, Executive has and will obtain access to Confidential Information of and for Employer or its Affiliates. For purposes of this Agreement, "Confidential Information" shall mean information not generally known or available without restriction to the trade or industry, including, without limitation, the following categories of information and documentation: (a) documentation and information relating to lending customers of Employer or any Affiliate, including, but not limited to, lists of lending clients with their addresses and account numbers, credit analysis reports and other credit files, outstanding loan amounts, repayment dates and instructions, information regarding the use of the loan proceeds, and loan maturity and renewal dates; (b) documentation and information relating to depositors of Employer or any Affiliate, including, but not limited to, lists of depositors with their addresses and account numbers, amounts held on deposit, types of depository products used and the number of accounts per customer; (c) documentation and information relating to trust customers of Employer or any Affiliate, including, but not limited to, lists of trust customers with their addresses and account numbers, trust investment management contracts, identity of investment managers, trust corpus amounts, and grantor and beneficiary information; (d) documentation and information relating to investment management clients of Employer or any Affiliate, including, but not limited to, lists of investors with their addresses, account numbers and beneficiary information, investment management contracts, amount of assets held for management, and the nature of the investment products used; (e) the identity of actual or potential customers of Employer or any Affiliate, including lists of the same; (f) the identity of suppliers and service providers of Employer or any Affiliate, including lists of the same and the material terms of any supply or service contracts; (g) marketing materials and information regarding the products and services offered by Employer or any Affiliate and the nature and scope of use of such marketing materials and product information; (h) policy and procedure manuals and other materials used by Employer or any Affiliate in the training and development of its employees; (i) identity and contents of all computer systems, programs and software utilized by Employer or any Affiliate to conduct its operations and manuals or other instructions for their use; (j) minutes or other summaries of Board of Directors or other department or committee meetings held by Employer or any Affiliate; (k) the business and strategic growth plans of Employer or any Affiliate; and (l) confidential communication materials provided for shareholders of Employer or any Affiliate. Absent prior authorization by Employer or as required in Executive's duties for Employer, Executive will not at any time, directly or indirectly, use, permit the use of, disclose or permit the disclosure to any third party of any such Confidential Information to which Executive will be provided access. These obligations apply both during Executive's employment with Employer and shall continue beyond the termination of Executive's employment and this Agreement.

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6. Inventions.All discoveries, designs, improvements, ideas, and inventions, whether patentable or not, relating to (or suggested by or resulting from) products, services, or other technology of Employer or any Affiliate or relating to (or suggested by or resulting from) methods or processes used or usable in connection with the business of Employer or any Affiliate that may be

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conceived, developed, or made by Executive during employment with Employer (hereinafter "Inventions"), either solely or jointly with others, shall automatically become the sole property of Employer or an Affiliate. Executive shall immediately disclose to Employer all such Inventions and shall, without additional compensation, execute all assignments and other documents deemed necessary to perfect the property rights of Employer or any Affiliate therein. These obligations shall continue beyond the termination of Executive's employment with respect to Inventions conceived, developed, or made by Executive during employment with Employer. The provisions of this Section 6 shall not apply to any Invention for which no equipment, supplies, facility, or trade secret information of Employer or any Affiliate is used by Executive and which is developed entirely on Executive's own time, unless (a) such Invention relates (i) to the business of Employer or an Affiliate or (ii) to the actual or demonstrably anticipated research or development of Employer or an Affiliate, or (b) such Invention results from work performed by Executive for Employer.

7. Remedies.Executive acknowledges that compliance with the terms of this Agreement is necessary to protect the Confidential Information and goodwill of Employer and its Affiliates and that any breach by Executive of this Agreement will cause continuing and irreparable injury to Employer and its Affiliates for which money damages would not be an adequate remedy. Executive acknowledges that Wintrust and all other Affiliates are and are intended to be third party beneficiaries of this Agreement. Executive acknowledges that Employer and any Affiliate shall, in addition to any other rights or remedies they may have, be entitled to injunctive relief for any breach by Executive of any part of this Agreement. This Agreement shall not in any way limit the remedies in law or equity otherwise available to Employer and its Affiliates.

8. Term of Agreement.Unless terminated sooner as provided in Section 9, the initial term of Executive's employment pursuant to this Agreement ("Initial Term") shall be three years, commencing on the date of this Agreement. After such Initial Term, this Agreement shall be extended automatically for successive one-year terms, unless either Executive or Employer gives contrary written notice not less than 60 days in advance of the expiration of the Initial Term or any succeeding term of this Agreement or unless terminated sooner as provided in Section 9. Notwithstanding the foregoing, if at any time during the Initial Term or any successive one-year term there is a Change in Control of Employer (as defined in Section 9(d)), then upon the first occurrence of such a Change in Control, the Initial Term or the successive one-year term of this Agreement (whichever is in effect as of the date of the Change in Control) shall automatically extend for the greater of: (a) the amount of time remaining on Executive's Initial Term of employment if such first occurrence of a Change in Control occurs during the Initial

Term, or (b) two years from the date of such first occurrence of a Change in Control. In the event that Executive's Initial Term or successive one-year term is extended due to such a Change in Control, such extension shall further be extended automatically for successive one-year terms unless either Executive or Employer gives contrary written notice not less than 60 days in advance of the expiration of the extension of this Agreement or unless terminated sooner as

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provided in Section 9. The Initial Term, together with any extension thereof in accordance with this Section 8, shall be referred to herein as the "Term."

9. Termination of Employment.

(a) General Provisions. Executive's employment may be terminated by Employer at any time for any reason, with or without cause, and, except as otherwise provided in this Section 9, any and all of Employer's obligations under this Agreement shall terminate, other than Employer's obligation to pay Executive, within 30 days of Executive's termination of employment, the full amount of any earned but unpaid base salary and accrued but unpaid vacation pay earned by Executive pursuant to this Agreement through and including the date of termination and to observe the terms and conditions of any plan or benefit arrangement which, by its terms, survives such termination of Executive's employment. The payments to be made under this Section 9(a) shall be made to Executive, or in the event of Executive's death, to such beneficiary as Executive may designate in writing to Employer for that purpose, or if Executive has not so designated, then to the spouse of Executive, or if none is surviving, then to the estate of Executive. Notwithstanding the foregoing, termination of employment shall not affect the obligations of Executive that, pursuant to the express provisions of this Agreement, continue in effect.

(b) Termination Without Cause.

(i) Payment. In the event Executive's employment is terminated without Cause (as such term is defined in Section 9(f) hereof) by Employer during the Term of this Agreement, other than upon the expiration of the Term of this Agreement, Employer shall pay Severance Pay to Executive in the amount equal to three times (3x) the sum of (A) Executive's base annual salary in effect at the time of Executive's termination plus (B) an amount equal to any annual incentive compensation paid to Executive during the twelve-month period prior to termination under the Company's annual bonus plan applicable to the Executive, as certified by Employer's Board of Directors or the Compensation Committee or any successor committee of Employer's Board of Directors. Notwithstanding anything herein to the contrary, (x) annual incentive compensation shall not include any signing bonus or any equity-based award or cash award with a vesting period of greater than one-year and (y) for the period from the Effective Date until March 1, 2017 the annual incentive compensation referred to in Section 9(b)(i)(B) above shall be $249,750.00.1 Severance Pay under this Section 9(b) shall be paid ratably over a 36-month period beginning on the first payroll period following such termination and on each payroll period thereafter during such Severance Pay period.

(ii) Reduction of Payment Due To Earned Income. The amount of Severance Pay under this Section 9(b) shall also be reduced by any income earned by Executive, whether paid to Executive immediately or deferred until a later date,

1 Calculated based on 67.5% of $370,000.

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during the applicable Severance Pay period from employment of any sort, including without limitation full, part time or temporary employment or work as an independent contractor or as a consultant; provided that, if Executive was a member of the board of directors of another company at the time of Executive's termination, the amount of Severance Pay under this Section 9(b) shall not be reduced by any income earned by Executive during the applicable Severance Pay period due to Executive's continued service in such capacity. Notwithstanding the foregoing, Executive's Severance Pay to be paid under this Section 9(b) shall not be less than an amount to provide Executive with a gross monthly payment of $8,333.34 during the 36-month Severance Pay period. Executive agrees to promptly notify Employer if Executive obtains employment of any sort during the applicable Severance Pay period and to provide Employer with a copy of the Executives earnings statements or other payroll or income records for each calendar month during the 36-month Severance Pay period and a summary of any contributions received under any deferred compensation arrangement for each calendar month during the 36-month Severance Pay period. In addition, no later than 45 days following the expiration of each calendar year during the 36-month Severance Pay period, Executive shall deliver to the Employer all W-2 and 1099 forms received during such calendar year.

(iii) Company-Paid Health Insurance. In the event of Executive's termination pursuant to this Section 9(b), from the termination date through the earliest of (A) the expiration of the maximum period of COBRA coverage, (B) the date on which Executive becomes eligible for coverage under another group health insurance plan with no pre-existing condition limitation or exclusion, or (C) the date on which Executive becomes entitled to benefits under Medicare, Executive (and any qualified dependents) shall be entitled to group health insurance coverage under the Employer's group health insurance plan for employees (as such plan is then in effect and as it may be amended at any time and from time to time during the period of coverage) in which Executive was participating immediately prior to termination, at Employer's expense, subject to any normal employee contributions, if any. The period during which Executive is being provided with health insurance under this Agreement shall be credited against Executive's period of COBRA coverage, if any. Executive shall promptly notify Employer if, prior to the expiration of the maximum period of COBRA coverage, Executive becomes eligible for coverage under another group health plan with no preexisting condition limitation or exclusion or Executive becomes entitled to benefits under Medicare.

(c) Constructive Termination.

(i) Payment. If Executive suffers a Constructive Termination during the Term of this Agreement, other than upon the expiration of the Term of this Agreement, Employer shall pay Severance Pay to Executive in the amounts and at the times described in Section 9(b) hereof. For the purposes of this Agreement, "Constructive Termination" means (A) a material reduction by Employer in the duties and responsibilities of Executive or (B) a reduction by Employer of Executive's "Adjusted Total Compensation" (as hereinafter defined), to (1) less than seventy-five

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percent (75%) of the Adjusted Total Compensation of Executive for the twelve-month period ending as of the last day of the month immediately preceding the month in which the Constructive Termination occurs; or (2) less than seventy-five percent (75%) of the Executive's Adjusted Total Compensation for the twelve-month period ending as of the last day of the month preceding the Effective Date, whichever is greater; provided, however, that if Executive is employed by Employer or any Affiliate of Employer for less than twelve months, Adjusted Total Compensation shall be calculated based on the initial annual base salary and value of perquisites, determined by the Employer as of the date Executive commences employment with the Employer or such Affiliate. A Constructive Termination does not include termination for Cause as defined in Section 9(f), termination without Cause as defined in Section 9(b), termination due to death, or termination due to a permanent disability (as hereinafter defined).

(ii) Reduction of Payment Due To Earned Income. The amount of Severance Pay under this Section 9(c) shall be reduced by any income earned by Executive, whether paid to Executive immediately or deferred until a later date, during such Severance Pay period from employment of any sort, including without limitation full, part time or temporary employment or work as an independent contractor or as a consultant; provided that, if Executive was a member of the board of directors of another company at the time of Executive's termination, the amount of Severance Pay under this Section 9(c) shall not be reduced by any income earned by Executive during the applicable Severance Pay period due to Executive's continued service in such capacity. Notwithstanding the foregoing, Executive's Severance Pay to be paid under this Section 9(c) shall not be less than an amount to provide Executive with a gross monthly payment of $8,333.34 during the 36-month Severance Pay period. Executive agrees to promptly notify Employer if Executive obtains employment of any sort during the applicable Severance Pay period and to provide Employer with a copy of the Executive's earnings statements or other payroll or income records for each calendar month during the 36-month Severance Pay period and a summary of any contributions received under any deferred compensation arrangement for each calendar month during the 36-month Severance Pay period. In addition, no later than 45 days following the expiration of each calendar year during the 36-month Severance Pay period, Executive shall deliver to the Employer all W-2 and 1099 forms received during such calendar year.

(iii) Company-Paid Health Insurance. In the event of Executive's termination pursuant to this Section 9(c), from the termination date through the earliest of (A) the expiration of the maximum period of COBRA coverage, (B) the date on which Executive becomes eligible for coverage under another group health insurance plan with no pre-existing condition limitation or exclusion, or (C) the date on which Executive becomes entitled to benefits under Medicare, Executive (and any qualified dependents) shall be entitled to group health insurance coverage under the Employer's group health insurance plan for employees (as such plan is then in effect and as it may be amended at any time and from time to time during the period of coverage) in which Executive was participating immediately prior to termination, at Employer's expense, subject to any normal employee contributions, if any. The period during

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which Executive is being provided with health insurance under this Agreement shall be credited against Executive's period of COBRA coverage, if any. Executive shall promptly notify Employer if, prior to the expiration of the maximum period of COBRA coverage, Executive becomes eligible for coverage under another group health plan with no preexisting condition limitation or exclusion or Executive becomes entitled to benefits under Medicare.

(iv) Definitions.

(A)    For the purposes of this Agreement, "Adjusted Total Compensation" means the aggregate base salary earned by the Executive plus the dollar value of all perquisites (i.e. Employer provided car, club dues and supplemental life insurance) as estimated by Employer. Adjusted Total Compensation shall exclude any bonus payments, annual or long-term cash incentive compensation or equity-based compensation paid to, awarded to or earned by the Executive. For the purposes of this Section 9(c), the Executive will not be deemed to have incurred a reduction by Employer of Executive's Adjusted Total Compensation if there is a general reduction in base salaries and/or perquisites applicable to the President, Chief Executive Officer and all Vice Presidents of Employer.

(B)    For the purposes of this Agreement, "permanent disability" means any mental or physical illness, disability or incapacity that renders Executive unable to perform Executive's duties hereunder where (x) such permanent disability has been determined to exist by a physician selected by Employer or (y) Employer has reasonably determined, based on such physician's advice, that such disability will continue for 180 days or more within any 365-day period, of which at least 90 days are consecutive. Executive shall cooperate in all respects with Employer if a question arises as to whether they have become disabled (including, without limitation, submitting to an examination by a physician or other health care specialist selected by Employer and authorizing such physician or other health care specialist to discuss Executive's condition with Employer).

(d) Termination Upon Change In Control.

(i) Payment. In the event that within eighteen months after a Change in Control (as defined below) of Employer (A) Executive's employment is terminated without Cause (as such term is defined in Section 9(f) hereof) prior to the expiration of the Term of this Agreement or (B) Executive suffers a Constructive Termination prior to the expiration of the Term of this Agreement, Employer (or the successor thereto) shall pay Severance Pay to Executive in the amount that is equivalent to the amount described in Section 9(b) hereof in a lump sum within 30 days following the date of Executive's termination or Constructive Termination ; provided, however, that if such Change in Control is not a "change in control event," within the meaning of Section 409A of the Internal Revenue Code of 1986, as amended (the "Code"), then such Severance Pay shall be paid at the same time and in the same form as set forth in Section

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9(b)(i).

(ii) Change In Control. For the purposes of this Agreement, a "Change in Control" of Wintrust shall have the same meaning as provided in Section 12(c) of the Wintrust 2015 Stock Incentive Plan.

(iii) Section 280G. Notwithstanding the foregoing, if the payment required to be paid under this Section 9(d), when considered either alone or with other payments paid or imputed to the Executive from Wintrust or an Affiliate that would be deemed "excess parachute payments" under Section 280G(b)(1) of the Code is deemed by Wintrust to be a "parachute payment" under Section 280G(b)(2) of the Code, then the amount of Severance Pay required to be paid under this Section 9(d) shall be automatically reduced in order of scheduled payments to an amount equal to $1.00 less than three times (3x) the "base amount" (as defined in Section 280G(3) of the Code) (the "Reduced Amount"). Provided, however, the preceding sentence shall not apply if the sum of (A) the amount of Severance Pay described in this Section 9(d) less (B) the amount of excise tax payable by the Executive under Section 4999 of the Code with respect to the amount of such Severance Pay and any other payments paid or imputed to the Executive from Wintrust or an Affiliate that would be deemed to be "excess parachute payments" under Section 280G(b)(1) of the Code, as further adjusted for payment of taxes by the Executive is greater than the Reduced Amount, as further adjusted for payment of taxes by the Executive. The decision of Wintrust (based upon the recommendations of its tax counsel and accountants) as to the characterization of payments as parachute payments, the value of parachute payments, the amount of excess parachute payments, the determination of any adjustments related to payment of taxes by the Executive, and the payment of the Reduced Amount shall be final.

(iv) Company-Paid Health Insurance. In the event Executive becomes entitled to payments under this Section 9(d), from the termination date through the earliest of (A) the expiration of the maximum period of COBRA coverage, (B) the date on which Executive becomes eligible for coverage under another group health insurance plan with no pre-existing condition limitation or exclusion, or (C) the date on which Executive becomes entitled to benefits under Medicare, Executive (and any qualified dependents) shall be entitled to group health insurance coverage under the Employer's group health insurance plan for employees (as such plan is then in effect and as it may be amended at any time and from time to time during the period of coverage) in which Executive was participating immediately prior to termination, at Employer's expense, subject to any normal employee contributions, if any. The period during which Executive is being provided with health insurance under this Agreement shall be credited against Executive's period of COBRA coverage, if any. Executive shall promptly notify Employer if, prior to the expiration of the maximum period of COBRA coverage, Executive becomes eligible for coverage under another group health plan with no pre-

- 10 -

existing condition limitation or exclusion or Executive becomes entitled to benefits under Medicare.

(v) Definitions. For the purposes of this Section 9(d), the term "Constructive Termination" shall have the same meaning as such term is defined in Section 9(c) with the following modifications:

(A)    A Constructive Termination shall be deemed to have occurred if after a Change in Control, the Executive's Adjusted Total Compensation is reduced to less than (1) 100% of the Adjusted Total Compensation of Executive for the twelve-month period ending as of the last day of the month immediately preceding the month in which the Constructive Termination occurs or (2) 100% percent of the Executive's Adjusted Total Compensation for the twelve-month period ending as of the last day of the month preceding the Effective Date, whichever is greater; provided, however, that if Executive is employed by Employer or any Affiliate of Employer for less than twelve months, Adjusted Total Compensation shall be calculated based on the initial annual base salary and value of perquisites, determined by the Employer as of the date Executive commences employment with the Employer or such Affiliate.

(B)    A Constructive Termination shall also be deemed to have occurred if after a Change in Control, Employer (or the successor thereto) delivers written notice to Executive that it will continue to employ Executive but will reject this Agreement (other than due to the expiration of the Term of this Agreement).

(C)    The last sentence of subsection 9(c)(iv)(A) shall not be applicable to a Constructive Termination following a Change in Control.

(e) Voluntary Termination. Executive may voluntarily terminate employment during the Term of this Agreement by a delivery to Employer of a written notice at least 60 days in advance of the termination date. If Executive voluntarily terminates employment prior to the expiration of the Term of this Agreement, any and all of the Employer's obligations under this Agreement shall terminate immediately except for the Employer's obligations contained in Section 9(a) hereof. Notwithstanding the foregoing, termination of employment shall not affect the obligations of Executive that, pursuant to the express provisions of this Agreement, continue in effect.

(f) Termination For Cause.If Executive is terminated for Cause as determined by the written resolution of Employer's Board of Directors or the Compensation Committee or any successor committee of Employer's Board of Directors, all obligations of the Employer shall terminate immediately except for Employer's obligations described in Section 9(a) hereof. Notwithstanding the foregoing, termination of employment shall not affect the obligations of Executive that, pursuant to the express provisions of this Agreement, continue in effect. For purposes of this Agreement, termination for "Cause" means:

- 11 -

(i) Executive's failure or refusal, after written notice thereof and after reasonable opportunity to cure, to perform specific directives approved by a majority of the Employer's Board of Directors which are consistent with the scope and nature of Executive's duties and responsibilities as provided in Section 1 of this Agreement;

(ii) Habitual drunkenness or illegal use of drugs which interferes with the performance of Executive's duties and obligations under this Agreement;

(ii) Executive's conviction of a felony;

(iv) Any defalcation or acts of gross or willful misconduct of Executive resulting in or potentially resulting in economic loss to Employer or substantial damage to Employer's reputation;

(v) Any breach of Executive's covenants contained in Sections 4 through 6 hereof;

(vi) A written order requiring termination of Executive from Executive's position with Employer by any regulatory agency or body; or

(vii) Executive's engagement, during the performance of Executive's duties hereunder, in acts or omissions constituting fraud, intentional breach of fiduciary obligation, intentional wrongdoing or malfeasance, or intentional and material violation of applicable banking laws, rules, or regulations.

(g) Executive's right to the Severance Pay per Sections 9(b) through 9(d) hereof shall be contingent upon (i) Executive having executed and delivered to Employer a release in such form as provided by the Employer not later than the date set forth in the release (but in no event more than 45 days after the date of termination) (the "Consideration Period"), (ii) Executive not revoking such release in accordance with the terms of the release and (ii) Executive not violating any of Executive's on-going obligations under this Agreement; provided, however, that Employer has the discretion to pay to Executive the Severance Pay per Sections 9(b) through 9(d), as applicable, prior to Employer's receipt of the release and/or the expiration of the release revocation period; provided, further that if Executive does not execute and deliver a release to Employer prior to the expiration of the Consideration Period or if Executive revokes the release in accordance with its terms, Executive shall pay to Employer within 10 days following the expiration of the Consideration Period or the date such release was revoked, a lump sum payment of all Severance Pay received by Executive to date.

(h) The payment of Severance Pay to Executive pursuant to Sections 9(b) through 9(d) hereof shall be for and in full satisfaction of any and all claims Executive may have

- 12 -

relating to or arising out of Executive's employment and termination of employment by Employer, any and all claims Executive may have relating to or arising out of this Agreement and the termination thereof and any and all claims Executive may have arising under any statute, ordinance or regulation or under common law. Executive expressly acknowledges and agrees that, except for whatever claim Executive may have to Severance Pay, Executive shall not have any claim for damages or other relief of any sort relating to or arising out of Executive's employment or termination of employment by Employer or relating to or arising out of this Agreement and the termination thereof.

(i) Upon termination of employment with Employer for any reason, Executive shall promptly deliver to Employer all writings, records, data, memoranda, contracts, orders, sales literature, price lists, client lists, data processing materials, and other documents, whether or not obtained from Employer or any Affiliate, which pertain to or were used by Executive in connection with Executive's employment by Employer or which pertain to Wintrust or any other Affiliate, including, but not limited to, Confidential Information, as well as any automobiles, computers or other equipment which were purchased or leased by Employer for Executive.

10.Resolution of Disputes. Except as otherwise provided herein, any disputes arising under or in connection with this Agreement or in any way arising out of, relating to or associated with the Executive's employment with Employer or the termination of such employment ("Claims"), that Executive may have against Employer or any Affiliate of Wintrust, or the officers, directors, employees or agents of Employer or any Affiliate of Wintrust in their capacity as such or otherwise, or that Employer or any Affiliate of Wintrust may have against Executive, shall be resolved by binding arbitration, to be held in Chicago, Illinois, in accordance with the rules and procedures of the National Rules for the Resolution of Employment Disputes of the American Arbitration Association (the "AAA") and the parties hereby agree to expedite such arbitration proceedings to the extent permitted by the AAA. Judgment upon the award rendered by the arbitrator(s) may be entered in any court having jurisdiction thereof The Claims covered by this Agreement include, but are not limited to: claims for wages or other compensation due; claims for breach of any contract or covenant, express or implied; tort claims; claims for discrimination, including but not limited to discrimination based on race, sex, sexual orientation, religion, national origin, age, marital status, handicap, disability or medical condition or harassment on any of the foregoing bases; claims for benefits, except as excluded in the following paragraph; and claims for violation of any federal, state or other governmental constitution, statute, ordinance, regulation, or public policy. The Claims covered by this Agreement do not include claims for workers' compensation benefits or compensation; claims for unemployment compensation benefits; claims based upon an employee pension or benefit plan, the terms of which contain an arbitration or other non-judicial resolution procedure, in which case the provisions of such plan shall apply; and claims made by either Employer or the Executive for injunctive and/or other equitable relief regarding the covenants set forth in Sections 3, 4, 5 and 6 of this Agreement. Each party shall initially bear their own costs of the

- 13 -

arbitration or litigation, except that, if Employer is found to have violated any material terms of this Agreement, Employer shall reimburse Executive for the entire amount of reasonable attorneys' fees incurred by Executive as a result of the dispute hereunder in addition to the payment of any damages awarded to Executive.

11. General Provisions.

(a)    All provisions of this Agreement are intended to be interpreted and construed in a manner to make such provisions valid, legal, and enforceable. To the extent that any Section of this Agreement or any word, phrase, clause, or sentence hereof shall be deemed by any court to be illegal or unenforceable, such word, clause, phrase, sentence, or Section shall be deemed modified, restricted, or omitted to the extent necessary to make this Agreement enforceable. Without limiting the generality of the foregoing, if the scope of any covenant in this Agreement is too broad to permit enforcement to its full extent, such covenant shall be enforced to the maximum extent provided by law; and Executive agrees that such scope may be judicially modified accordingly.

(b)    This Agreement may be assigned by Employer. This Agreement and the covenants set forth herein shall inure to the benefit of and shall be binding upon the successors and assigns of Employer.

(c)    This Agreement may not be assigned by Executive, but shall be binding upon Executive's executors, administrators, heirs, and legal representatives.

(d)    No waiver by either party of any breach by the other party of any of the obligations, covenants, or representations under this Agreement shall constitute a waiver of any prior or subsequent breach.

(e)    Where in this Agreement the masculine gender is used, it shall include the feminine if the sense so requires.

(f)    Employer may withhold from any payment that it is required to make under this Agreement amounts sufficient to satisfy applicable withholding requirements under any federal, state, or local law.

(g)    This instrument constitutes the entire agreement of the parties with respect to its subject matter. This Agreement may not be changed or amended orally but only by an agreement in writing, signed by the party against whom enforcement of any waiver, change, modification, extension, or discharge is sought. Any other understandings and agreements, oral or written, respecting the subject matter hereof are hereby superseded and canceled.

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(h)    The provisions of Sections 4, 5, 6, 7, 9(g), 9(h), 10, 11, and 12 of this Agreement shall survive the termination of Executive's employment with Employer and the expiration or termination of this Agreement.

12. Governing Law.The parties agree that this Agreement shall be construed

and governed by the laws of the State of Illinois, excepting its conflict of laws principles. Further, the parties acknowledge and specifically agree to the jurisdiction of the courts of

the State of Illinois in the event of any dispute regarding Sections 3, 4, 5, or 6 of this Agreement.

13. Notice of Termination. Subject to the provisions of Section 8, in the event that Employer desires to terminate the employment of the Executive during the Term of this Agreement, Employer shall deliver to Executive a written notice of termination, stating whether the termination constitutes a termination in accordance with Section 9(b), 9(d), or 9(f). In the event that Executive determines in good faith that Executive has experienced a Constructive Termination under Section 9(c) or 9(d), Executive shall deliver to Employer a written notice stating the circumstances that constitute such Constructive Termination not later than 90 days after the initial existence of such circumstances and Employer shall 30 days after receipt of such notice to remedy the circumstances that constitute Constructive Termination. In the event that the Executive desires to effect a voluntary termination of Executive's employment in accordance with Section 9(e), Executive shall deliver a written notice of such voluntary termination to Employer.

14. Section 409A. This Agreement is intended to comply with the requirements of Section 409A of the Code, and shall be interpreted and construed consistently with such intent. The payments to Executive pursuant to this Agreement are also intended to be exempt from Section 409A of the Code to the maximum extent possible, under either the separation pay exemption pursuant to Treasury regulation §1.409A-1(b)(9)(iii) or as short-term deferrals pursuant to Treasury regulation §1.409A-1(b)(4), and for purposes of the separation pay exemption, each installment paid to Executive under this Agreement shall be considered a separate payment. In the event the terms of this Agreement would subject Executive to taxes or penalties under Section 409A of the Code ("409A Penalties"), Employer and Executive shall cooperate diligently to amend the terms of the Agreement to avoid such 409A Penalties, to the extent possible; provided that in no event shall Employer be responsible for any 409A Penalties that arise in connection with any amounts payable under this Agreement. To the extent any amounts under this Agreement are payable by reference to Executive's "termination of employment" such term and similar terms shall be deemed to refer to Executive's "separation from service," within the meaning of Section 409A of the Code. Notwithstanding any other provision in this Agreement, if Executive is a "specified employee," as defined in Section 409A of the Code, as of the date of Executive's separation from service, then to the extent any amount payable under this Agreement (i) constitutes the payment of nonqualified deferred compensation, within the meaning of Section 409A of the Code, (ii) is payable upon Executive's separation from service and (iii) under the terms of this Agreement would be payable prior to the six-month anniversary of Executive's separation from service, such payment shall be delayed until the

- 15 -

earlier to occur of (a) the six-month anniversary of the separation from service or (b) the date of Executive's death. Any reimbursement payable to Executive pursuant to this Agreement shall be conditioned on the submission by Executive of all expense reports reasonably required by Employer under any applicable expense reimbursement policy, and shall be paid to Executive within 30 days following receipt of such expense reports, but in no event later than the last day of the calendar year following the calendar year in which Executive incurred the reimbursable expense. Any amount of expenses eligible for reimbursement, or in-kind benefit provided, during a calendar year shall not affect the amount of expenses eligible for reimbursement, or in-kind benefit to be provided, during any other calendar year. The right to any reimbursement or in-kind benefit pursuant to this Agreement shall not be subject to liquidation or exchange for any other benefit.

IN WITNESS WHEREOF, the parties have executed and delivered this Agreement as of the date written opposite their signatures.

WINTRUST FINANCIAL CORPORATION EXECUTIVE

By: By:

By: /s/ David A. Dykstra By: /s/Kathleen M. Boege

Its: Senior Executive Vice PresidentDated:September 8, 2015

Dated:September 8, 2015

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EXHIBIT A

Barrington Bank & Trust Company, N.A.

Beverly Bank & Trust Company, N.A.

Crystal Lake Bank & Trust Company, N.A.

First Insurance Funding Corporation

First Insurance Funding of Canada

Great Lakes Advisors, LLC

Hinsdale Bank & Trust Company

Lake Forest Bank & Trust Company

Libertyville Bank & Trust Company

Northbrook Bank & Trust Company

Old Plank Trail Community Bank, N.A.

Schaumburg Bank & Trust Company, N.A.

St. Charles Bank & Trust Company

State Bank of the Lakes

The Chicago Trust Company

Town Bank

Tricom, Inc. of Milwaukee

Village Bank & Trust

Wayne Hummer Investments, LLC

Wheaton Bank & Trust Company

Wintrust Bank

Wintrust Asset Finance Inc.

Wintrust Information Technology Services Company (a division of Wintrust Financial

Corporation)

Wintrust Mortgage Corporation (division of Barrington Bank & Trust Company, N.A.)

- 17 -

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Timothy S. Crane, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Wintrust Financial Corporation;

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 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 accounted 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 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 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 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: May 9, 2024

/s/ TIMOTHY S. CRANE

Name:    Timothy S. Crane

Title:      President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, David L. Stoehr, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Wintrust Financial Corporation;

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 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 accounted 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 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 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 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: May 9, 2024

/s/ DAVID L. STOEHR

Name:    David L. Stoehr

Title:      Executive Vice President and
               Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATIONS

SARBANES-OXLEY ACT SECTION 906

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, the undersigned Chief Executive Officer and Chief Financial Officer of Wintrust Financial Corporation (“the Company”) certify, on the basis of such officers’ knowledge and belief that:

(1)The Quarterly Report of the Company on Form 10-Q for the period ended March 31, 2024, as filed with the Securities and Exchange Commission on May 9, 2024 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ TIMOTHY S. CRANE

Name:    Timothy S. Crane

Title:      President and Chief Executive Officer

Date:      May 9, 2024

/s/ DAVID L. STOEHR

Name:    David L. Stoehr

Title:      Executive Vice President and
               Chief Financial Officer

Date:     May 9, 2024

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission upon request. This certification accompanies the Report and shall not be treated as having been filed as part of this Report.

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	Apr. 30, 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	001-35077
Entity Registrant Name	WINTRUST FINANCIAL CORP
Entity Incorporation, State or Country Code	IL
Entity Tax Identification Number	36-3873352
Entity Address, Address Line One	9700 W. Higgins Road, Suite 800
Entity Address, City or Town	Rosemont
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60018
City Area Code	847
Local Phone Number	939-9000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		61,753,551
Entity Central Index Key	0001015328
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Stock, no par value
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	WTFC
Security Exchange Name	NASDAQ
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, no par value
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, no par value
Trading Symbol	WTFCM
Security Exchange Name	NASDAQ
6.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E, no par value
Entity Information [Line Items]
Title of 12(b) Security	6.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E, no par value
Trading Symbol	WTFCP
Security Exchange Name	NASDAQ

XML

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Assets
Cash and due from banks	$ 379,825	$ 423,404	$ 445,928
Federal funds sold and securities purchased under resale agreements	61	60	58
Interest-bearing deposits with banks	2,131,077	2,084,323	1,563,578
Available-for-sale securities, at fair value	4,387,598	3,502,915	3,259,845
Held-to-maturity securities, at amortized cost, net of allowance for credit losses of $329, $347 and $463 at March 31, 2024, December 31, 2023 and March 31, 2023, respectively ($3.1 billion, $3.2 billion and $3.0 billion fair value at March 31, 2024, December 31, 2023 and March 31, 2023, respectively)	3,810,015	3,856,916	3,606,391
Trading account securities	2,184	4,707	102
Equity securities with readily determinable fair value	119,777	139,268	111,943
Federal Home Loan Bank and Federal Reserve Bank stock	224,657	205,003	244,957
Brokerage customer receivables	13,382	10,592	16,042
Mortgage loans held-for-sale, at fair value	339,884	292,722	302,493
Loans, net of unearned income	43,230,706	42,131,831	39,565,471
Allowance for loan losses	(427,175)	(427,265)	(375,798)
Premises, software and equipment, net	744,769	748,966	760,283
Lease investments, net	283,557	281,280	256,301
Accrued interest receivable and other assets	1,580,142	1,551,899	1,413,795
Trade date securities receivable	0	690,722	939,758
Goodwill	656,181	656,672	653,587
Other acquisition-related intangible assets	21,730	22,889	20,951
Total assets	57,576,933	56,259,934	52,873,511
Deposits:
Non-interest-bearing	9,908,183	10,420,401	11,236,083
Interest-bearing	36,540,675	34,976,769	31,482,128
Total deposits	46,448,858	45,397,170	42,718,211
Federal Home Loan Bank advances	2,676,751	2,326,071	2,316,071
Other borrowings	575,408	645,813	583,548
Subordinated notes	437,965	437,866	437,493
Junior subordinated debentures	253,566	253,566	253,566
Accrued interest payable and other liabilities	1,747,985	1,799,922	1,549,116
Total liabilities	52,140,533	50,860,408	47,858,005
Shareholders’ Equity:
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at March 31, 2024, December 31, 2023 and March 31, 2023; 61,798,213 shares issued at March 31, 2024, 61,268,566 shares issued at December 31, 2023 and 61,197,979 shares issued at March 31, 2023	61,798	61,269	61,198
Surplus	1,954,532	1,943,806	1,913,947
Treasury stock, at cost, $61,498 shares at March 31, 2024, 24,940 shares at December 31, 2023, and 21,564 shares at March 31, 2023	(5,757)	(2,217)	(1,966)
Retained earnings	3,498,475	3,345,399	2,997,263
Accumulated other comprehensive loss	(485,148)	(361,231)	(367,436)
Total shareholders’ equity	5,436,400	5,399,526	5,015,506
Total liabilities and shareholders’ equity	57,576,933	56,259,934	52,873,511
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at March 31, 2024, December 31, 2023 and March 31, 2023
Shareholders’ Equity:
Preferred stock, no par value; 20,000,000 shares authorized:	125,000	125,000	125,000
Series E - $25,000 liquidation value; 11,500 shares issued and outstanding at March 31, 2024, December 31, 2023 and March 31, 2023
Shareholders’ Equity:
Preferred stock, no par value; 20,000,000 shares authorized:	287,500	287,500	287,500
Loans
Assets
Loans, net of unearned income	43,230,706	42,131,831	39,565,471
Allowance for loan losses	(348,612)	(344,235)	(287,972)
Net loans	$ 42,882,094	$ 41,787,596	$ 39,277,499

XML

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Held-to-maturity securities, allowance for credit loss	$ 329	$ 347	$ 463
Held-to-maturity securities, fair value	$ 3,111,954	$ 3,215,468	$ 2,976,198
Preferred stock, authorized (in shares)	20,000,000	20,000,000	20,000,000
Common stock, stated value (usd per share)	$ 1.00	$ 1.00	$ 1.00
Common stock, authorized (in shares)	100,000,000	100,000,000	100,000,000
Common stock, issued (in shares)	61,798,213	61,268,566	61,197,979
Treasury stock (in shares)	61,498	24,940	21,564
Series D Preferred Stock
Preferred stock, liquidation value per share (usd per share)	$ 25	$ 25	$ 25
Preferred stock, issued (in shares)	5,000,000	5,000,000	5,000,000
Preferred stock, outstanding (in shares)	5,000,000	5,000,000	5,000,000
Series E Preferred Stock
Preferred stock, liquidation value per share (usd per share)	$ 25,000	$ 25,000	$ 25,000
Preferred stock, issued (in shares)	11,500	11,500	11,500
Preferred stock, outstanding (in shares)	11,500	11,500	11,500

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CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income
Interest and fees on loans	$ 710,341	$ 558,692
Mortgage loans held-for-sale	4,146	3,528
Interest-bearing deposits with banks	16,658	13,468
Federal funds sold and securities purchased under resale agreements	19	70
Investment securities	69,678	59,943
Trading account securities	18	14
Federal Home Loan Bank and Federal Reserve Bank stock	4,478	3,680
Brokerage customer receivables	175	295
Total interest income	805,513	639,690
Interest expense
Interest on deposits	299,532	144,802
Interest on Federal Home Loan Bank advances	22,048	19,135
Interest on other borrowings	9,248	7,854
Interest on subordinated notes	5,487	5,488
Interest on junior subordinated debentures	5,004	4,416
Total interest expense	341,319	181,695
Net interest income	464,194	457,995
Provision for credit losses	21,673	23,045
Net interest income after provision for credit losses	442,521	434,950
Non-interest income
Wealth management	34,815	29,945
Mortgage banking	27,663	18,264
Service charges on deposit accounts	14,811	12,903
Gains on investment securities, net	1,326	1,398
Fees from covered call options	4,847	10,391
Trading gains, net	677	813
Operating lease income, net	14,110	13,046
Other	42,331	21,009
Total non-interest income	140,580	107,769
Non-interest expense
Salaries and employee benefits	195,173	176,781
Software and equipment	27,731	24,697
Operating lease equipment	10,683	9,833
Occupancy, net	19,086	18,486
Data processing	9,292	9,409
Advertising and marketing	13,040	11,946
Professional fees	9,553	8,163
Amortization of other acquisition-related intangible assets	1,158	1,235
FDIC insurance	14,537	8,669
Other real estate owned expense, net	392	(207)
Other	32,500	30,157
Total non-interest expense	333,145	299,169
Income before taxes	249,956	243,550
Income tax expense	62,662	63,352
Net income	187,294	180,198
Preferred stock dividends	6,991	6,991
Net income applicable to common shares	$ 180,303	$ 173,207
Net income per common share-Basic (usd per share)	$ 2.93	$ 2.84
Net income per common share-Diluted (usd per share)	2.89	2.80
Cash dividends declared per common share (usd per share)	$ 0.45	$ 0.40
Weighted average common shares outstanding (in shares)	61,481	60,950
Dilutive potential common shares (in shares)	928	873
Average common shares and dilutive common shares (in shares)	62,409	61,823

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 187,294	$ 180,198
Unrealized (losses) gains on available-for-sale securities
Before tax	(77,888)	47,040
Tax effect	20,601	(12,537)
Net of tax	(57,287)	34,503
Reclassification of net gains on available-for-sale securities included in net income
Before tax	(26)	560
Tax effect	7	(151)
Net of tax	(19)	409
Reclassification of amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale
Before tax	50	43
Tax effect	(13)	(11)
Net of tax	37	32
Net unrealized (losses) gains on available-for-sale securities	(57,305)	34,062
Unrealized (losses) gains on derivative instruments
Before tax	(82,091)	34,666
Tax effect	21,713	(9,238)
Net unrealized (losses) gains on derivative instruments	(60,378)	25,428
Foreign currency adjustment
Before tax	(7,649)	890
Tax effect	1,415	(180)
Net foreign currency adjustment	(6,234)	710
Total other comprehensive (loss) income	(123,917)	60,200
Comprehensive income	$ 63,377	$ 240,398

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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred stock	Common stock	Surplus	Treasury stock	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2022	$ 4,796,838	$ (544)	$ 412,500	$ 60,797	$ 1,902,474	$ (304)	$ 2,849,007	$ (544)	$ (427,636)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	180,198						180,198
Other comprehensive income (loss), net of tax	60,200								60,200
Cash dividends declared on common stock	(24,407)						(24,407)
Dividends on Series D and E preferred stock	(6,991)						(6,991)
Stock-based compensation	8,295				8,295
Common stock issued for:
Exercise of stock options	2,216			54	2,162
Restricted stock awards	(1,662)			275	(275)	(1,662)
Employee stock purchase plan	694			9	685
Director compensation plan	669			63	606
Ending balance at Mar. 31, 2023	5,015,506		412,500	61,198	1,913,947	(1,966)	2,997,263		(367,436)
Beginning balance at Dec. 31, 2023	5,399,526		412,500	61,269	1,943,806	(2,217)	3,345,399		(361,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	187,294						187,294
Other comprehensive income (loss), net of tax	(123,917)								(123,917)
Cash dividends declared on common stock	(27,227)						(27,227)
Dividends on Series D and E preferred stock	(6,991)						(6,991)
Stock-based compensation	9,157				9,157
Common stock issued for:
Exercise of stock options	25			1	24
Restricted stock awards	(3,504)			505	(469)	(3,540)
Employee stock purchase plan	741			8	733
Director compensation plan	1,296			15	1,281
Ending balance at Mar. 31, 2024	$ 5,436,400		$ 412,500	$ 61,798	$ 1,954,532	$ (5,757)	$ 3,498,475		$ (485,148)

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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash dividends declared on common stock (usd per share)	$ 0.45	$ 0.40
Series D Preferred Stock
Dividends on preferred stock (usd per share)	0.41	0.41
Series E Preferred Stock
Dividends on preferred stock (usd per share)	$ 429.69	$ 429.69

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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities:
Net income	$ 187,294	$ 180,198
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	21,673	23,045
Depreciation, amortization and accretion, net	21,464	18,798
Stock-based compensation expense	9,157	8,295
Amortization of premium on securities, net	190	275
Accretion of discount and deferred fees on loans, net	(3,601)	(4,263)
Mortgage servicing rights fair value changes	(3,210)	10,863
Non-designated derivatives fair value changes, net	1,985	(2,805)
Originations and purchases of mortgage loans held-for-sale	(475,613)	(366,006)
Early buy-out exercises of mortgage loans held-for-sale guaranteed by U.S. government agencies, net of subsequent paydowns or payoffs	(16,562)	(6,334)
Proceeds from sales of mortgage loans held-for-sale	446,262	366,509
Bank owned life insurance (“BOLI”) (gains) losses	(1,651)	1,351
Decrease in trading securities, net	2,523	1,025
(Increase) decrease in brokerage customer receivables, net	(2,790)	345
Gains on mortgage loans sold	(12,000)	(10,795)
Gains on investment securities, net	(1,326)	(1,398)
(Gains) losses on sales of premises and equipment, net	(146)	93
Losses on sales and fair value adjustments of other real estate owned, net	207	99
Increase in accrued interest receivable and other assets, net	(40,478)	(97,024)
Decrease in accrued interest payable and other liabilities, net	(62,253)	(53,830)
Net Cash Provided by Operating Activities	71,125	68,441
Investing Activities:
Proceeds from calls and sales of available-for-sale securities	690,866	934,554
Proceeds from payments and maturities of available-for-sale securities	82,418	74,043
Proceeds from payments, maturities and calls of held-to-maturity securities	46,588	40,342
Proceeds from sales of equity securities with readily determinable fair value	45,000	23,592
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	2,226	67
Purchases of available-for-sale securities	(1,045,047)	(996,433)
Purchases of held-to-maturity securities	0	(6,443)
Purchases of equity securities with readily determinable fair value	(24,000)	(23,697)
Purchases of equity securities without readily determinable fair value	(2,900)	(4,850)
(Purchases) redemptions of Federal Home Loan Bank and Federal Reserve Bank stock, net	(19,654)	20,198
Distributions from investments in partnerships, net	242	2,794
Proceeds from sales of other real estate owned	0	435
(Increase) decrease in interest-bearing deposits with banks, net	(49,062)	424,842
Increase in loans, net	(1,135,248)	(365,885)
Purchases of premises and equipment, net	(10,599)	(9,139)
Net Cash (Used for) Provided by Investing Activities	(1,419,170)	114,420
Financing Activities:
Increase (decrease) in deposit accounts, net	1,051,686	(184,335)
Decrease in other borrowings, net	(62,239)	(13,968)
Increase in Federal Home Loan Bank advances, net	350,680	0
Cash payments to settle contingent consideration liabilities recognized in business combinations	0	(57)
Issuance of common shares resulting from the exercise of stock options, employee stock purchase plan and director compensation plan	2,098	3,579
Common stock repurchases for tax withholdings related to stock-based compensation	(3,540)	(1,662)
Dividends paid	(34,218)	(31,398)
Net Cash Provided by (Used for) Financing Activities	1,304,467	(227,841)
Net Decrease in Cash and Cash Equivalents	(43,578)	(44,980)
Cash and Cash Equivalents at Beginning of Period	423,464	490,966
Cash and Cash Equivalents at End of Period	$ 379,886	$ 445,986

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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

The interim consolidated financial statements of Wintrust Financial Corporation and its subsidiaries (collectively, “Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management, reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the interim consolidated financial statements.

The accompanying interim consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles (“GAAP”). The interim unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (“2023 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation.

The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable; however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for credit losses, including the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity securities losses, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company’s significant accounting policies are included in Note (1) “Summary of Significant Accounting Policies” of the 2023 Form 10-K. In preparation of these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users or filed with the SEC.

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Recent Accounting Developments

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Recent Accounting Developments

Recent Accounting Developments

Equity Method and Joint Ventures - Investments in Tax Credit Structures

In March 2023, the FASB issued ASU No. 2023-02, “Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method,” which allows reporting entities the option to apply the proportional amortization method to other tax credit programs besides the Low-Income Housing Tax Credit structures. The guidance requires application of the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing the method at the reporting level entity level. The Company adopted ASU No. 2023-02 as of January 1, 2024. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements.

Segment Reporting

In November 2023, the FASB issued ASU No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” to enhance public entity disclosures regarding significant segment expenses which are regularly reported to an entity’s chief operating decision-maker (“CODM”) and included in a segment’s reported profit or loss. This ASU requires disclosure of the amount and composition of “other segment items,” the title and position of the CODM, and how the CODM uses reported measures of profit or loss to assess segment performance. Further, the guidance requires certain segment disclosures previously provided only annually, on an interim basis. This guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The guidance is to be applied retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this guidance on the consolidated financial statements.

Income Tax Disclosures

In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” to enhance the transparency and decision usefulness of income tax disclosures. This ASU requires annually that all entities disclose increasingly disaggregated information on amount of income taxes paid. Further, this ASU requires annually that all public entities must disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a specific quantitative threshold. This guidance is effective for fiscal years beginning after December 15, 2024, and is to be applied either on a prospective basis or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

Compensation – Scope Application of Profits Interest and Similar Awards

In March 2024, the FASB issued ASU No. 2024-01, “Compensation – Stock Compensation (Topic 718): Scope Application of Profits Interest and Similar Awards” which clarifies the guidance by providing an illustrative example to demonstrate how an entity should apply the scope guidance in Topic 718 when determining whether profits interest and similar awards should be accounted for in accordance with Topic 718. For public business entities, this guidance is effective for fiscal years beginning after December 15, 2024, including interim periods therein, and is to be applied either on a prospective basis or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

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Business Combinations

3 Months Ended

Mar. 31, 2024

Business Combination and Asset Acquisition [Abstract]

Business Combinations

Business Combinations

On April 3, 2023, the Company completed its acquisition of Rothschild & Co Asset Management US Inc. and Rothschild & Co Risk Based Investments LLC from Rothschild & Co North America Inc. As of the acquisition date, the Company acquired approximately $12.6 million in net assets. As the transaction was determined to be a business combination, the Company recorded goodwill of approximately $2.6 million on the purchase.

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Cash and Cash Equivalents

3 Months Ended

Mar. 31, 2024

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

Cash and Cash Equivalents

For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

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Investment Securities

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

The following tables are a summary of the investment securities portfolios as of the dates shown:

	March 31, 2024
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities
U.S. Treasury	$	61,185	$	—	$	(10)	$	61,175
U.S. government agencies	50,000		—		(4,285)		45,715
Municipal	144,752		569		(4,731)		140,590
Corporate notes:
Financial issuers	83,996		—		(8,264)		75,732
Other	1,000		—		(7)		993
Mortgage-backed: (1)
Residential mortgage-backed securities	4,396,962		480		(520,719)		3,876,723
Commercial (multi-family) mortgage-backed securities	16,225		28		(577)		15,676
Collateralized mortgage obligations	188,240		924		(18,170)		170,994
Total available-for-sale securities	$	4,942,360	$	2,001	$	(556,763)	$	4,387,598
Held-to-maturity securities
U.S. government agencies	$	336,463	$	—	$	(69,998)	$	266,465
Municipal	168,490		258		(4,709)		164,039
Mortgage-backed: (1)
Residential mortgage-backed securities	3,007,304		—		(597,758)		2,409,546
Commercial (multi-family) mortgage-backed securities	6,401		—		(281)		6,120
Collateralized mortgage obligations	234,314		431		(22,983)		211,762
Corporate notes	57,372		8		(3,358)		54,022
Total held-to-maturity securities	$	3,810,344	$	697	$	(699,087)	$	3,111,954
Less: Allowance for credit losses	(329)
Held-to-maturity securities, net of allowance for credit losses	$	3,810,015
Equity securities with readily determinable fair value	$	123,421	$	4,480	$	(8,124)	$	119,777

(1)None of our mortgage-backed securities are subprime.

	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(In thousands)
Available-for-sale securities
U.S. Treasury	$	6,960	$	8	$	—	$	6,968
U.S. government agencies	50,000		—		(4,876)		45,124
Municipal	144,299		657		(3,998)		140,958
Corporate notes:
Financial issuers	83,996		—		(8,456)		75,540
Other	1,000		—		(9)		991
Mortgage-backed: (1)
Residential Mortgage-backed securities	3,505,012		1,392		(446,784)		3,059,620
Commercial (multi-family) mortgage-backed securities	13,201		68		(289)		12,980
Collateralized mortgage obligations	175,346		1,400		(16,012)		160,734
Total available-for-sale securities	$	3,979,814	$	3,525	$	(480,424)	$	3,502,915
Held-to-maturity securities
U.S. government agencies	$	336,468	$	—	$	(67,058)	$	269,410
Municipal	172,933		565		(3,778)		169,720
Mortgage-backed: (1)
Residential Mortgage-backed securities	3,042,828		1,922		(549,265)		2,495,485
Commercial (multi-family) mortgage-backed securities	6,415		—		(184)		6,231
Collateralized mortgage obligations	241,075		978		(21,502)		220,551
Corporate notes	57,544		7		(3,480)		54,071
Total held-to-maturity securities	$	3,857,263	$	3,472	$	(645,267)	$	3,215,468
Less: Allowance for credit losses	(347)
Held-to-maturity securities, net of allowance for credit losses	$	3,856,916
Equity securities with readily determinable fair value	$	143,312	$	3,500	$	(7,544)	$	139,268

(1)None of our mortgage-backed securities are subprime.

	March 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(In thousands)
Available-for-sale securities
U.S. Treasury	$	4,947	$	1	$	—	$	4,948
U.S. government agencies	80,000		—		(5,138)		74,862
Municipal	164,110		439		(4,163)		160,386
Corporate notes:
Financial issuers	93,995		—		(11,320)		82,675
Other	1,000		—		—		1,000
Mortgage-backed: (1)
Mortgage-backed securities	3,300,048		1,787		(445,405)		2,856,430
Collateralized mortgage obligations	95,880		—		(16,336)		79,544
Total available-for-sale securities	$	3,739,980	$	2,227	$	(482,362)	$	3,259,845
Held-to-maturity securities
U.S. government agencies	$	339,608	$	24	$	(70,064)	$	269,568
Municipal	174,720		1,117		(2,880)		172,957
Mortgage-backed: (1)
Mortgage-backed securities	2,872,591		1,197		(533,415)		2,340,373
Collateralized mortgage obligations	161,874		—		(22,431)		139,443
Corporate notes	58,061		14		(4,218)		53,857
Total held-to-maturity securities	$	3,606,854	$	2,352	$	(633,008)	$	2,976,198
Less: Allowance for credit losses	(463)
Held-to-maturity securities, net of allowance for credit losses	$	3,606,391
Equity securities with readily determinable fair value	$	116,296	$	3,065	$	(7,418)	$	111,943

(1)Consisting entirely of residential mortgage-backed securities, none of which are subprime.

Equity securities without readily determinable fair values totaled $63.2 million as of March 31, 2024. Equity securities without readily determinable fair values are included as part of accrued interest receivable and other assets in the Company’s Consolidated Statements of Condition. The Company monitors its equity investments without readily determinable fair values to identify potential transactions that may indicate an observable price change in orderly transactions for the identical or a similar investment of the same issuer, requiring adjustment to its carrying amount. During the three months ended March 31, 2024 and March 31, 2023, the Company recorded no upward or downward adjustments related to such observable price changes, respectively. The Company conducts a quarterly assessment of its equity securities without readily determinable fair values to determine whether impairment exists in such securities, considering, among other factors, the nature of the securities, financial condition of the issuer and expected future cash flows. During the three months ended March 31, 2024, the Company recorded $2,000 of impairment of equity securities without readily determinable fair values. During the three months ended March 31, 2023, the Company recorded no impairment of equity securities without readily determinable fair values.

The following table presents the portion of the Company’s available-for-sale investment securities portfolios that have gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at March 31, 2024:

	Continuous unrealized losses existing for less than 12 months				Continuous unrealized losses existing for greater than 12 months				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Available-for-sale securities
U.S. Treasury	$	61,175	$	(10)	$	—	$	—	$	61,175	$	(10)
U.S. government agencies	—		—		45,715		(4,285)		45,715		(4,285)
Municipal	46,448		(324)		69,700		(4,407)		116,148		(4,731)
Corporate notes:
Financial issuers	—		—		75,732		(8,264)		75,732		(8,264)
Other	993		(7)		—		—		993		(7)
Mortgage-backed: (1)
Residential mortgage-backed securities	1,567,822		(15,974)		2,277,921		(504,745)		3,845,743		(520,719)
Commercial (multi-family) mortgage-backed securities	12,686		(577)		—		—		12,686		(577)
Collateralized mortgage obligations	18,112		(83)		71,520		(18,087)		89,632		(18,170)
Total available-for-sale securities	$	1,707,236	$	(16,975)	$	2,540,588	$	(539,788)	$	4,247,824	$	(556,763)

(1)None of our mortgage-backed securities are subprime.

The Company conducts a regular assessment of its investment securities to determine whether securities are experiencing credit losses. Factors for consideration include the nature of the securities, credit ratings or financial condition of the issuer, the extent of the unrealized loss, expected cash flows, market conditions and the Company’s ability to hold the securities through the anticipated recovery period.

The Company does not consider available-for-sale securities with unrealized losses at March 31, 2024 to be experiencing credit losses and recognized no resulting allowance for credit losses for such individually assessed credit losses. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost bases, which may be the maturity dates of the securities. The unrealized losses within each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. Available-for-sale securities with continuous unrealized losses existing for more than twelve months at March 31, 2024 were primarily mortgage-backed securities with unrealized losses due to increased market rates during such period.

See Note (7) “Allowance for Credit Losses” in Item 1 of this report for further discussion regarding any credit losses associated with held-to-maturity securities at March 31, 2024.

The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities recognized in earnings and proceeds received through the sale or call of investment securities:

	Three months ended March 31,
(In thousands)	2024		2023
Realized gains on investment securities	$	1,035	$	605
Realized losses on investment securities	(108)		(45)
Net realized gains on investment securities	927		560
Unrealized gains on equity securities with readily determinable fair value	1,034		2,290
Unrealized losses on equity securities with readily determinable fair value	(633)		(1,452)
Net unrealized gains on equity securities with readily determinable fair value	401		838
Impairment of equity securities without readily determinable fair values	(2)		—
Gains on investment securities, net	$	1,326	$	1,398

The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of March 31, 2024, December 31, 2023 and March 31, 2023, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties:

	March 31, 2024				December 31, 2023				March 31, 2023
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale securities
Due in one year or less	$	107,680	$	107,285	$	53,162	$	52,945	$	108,880	$	108,429
Due in one to five years	130,137		121,417		132,348		123,985		131,959		122,172
Due in five to ten years	85,212		80,234		82,040		76,869		39,019		35,158
Due after ten years	17,904		15,269		18,705		15,782		64,194		58,112
Mortgage-backed	4,601,427		4,063,393		3,693,559		3,233,334		3,395,928		2,935,974
Total available-for-sale securities	$	4,942,360	$	4,387,598	$	3,979,814	$	3,502,915	$	3,739,980	$	3,259,845
Held-to-maturity securities
Due in one year or less	$	4,652	$	4,616	$	5,169	$	5,142	$	2,302	$	2,300
Due in one to five years	115,707		111,324		109,602		105,835		98,207		93,717
Due in five to ten years	89,538		88,050		99,700		98,718		110,967		110,892
Due after ten years	352,428		280,536		352,474		283,506		360,913		289,473
Mortgage-backed	3,248,019		2,627,428		3,290,318		2,722,267		3,034,465		2,479,816
Total held-to-maturity securities	$	3,810,344	$	3,111,954	$	3,857,263	$	3,215,468	$	3,606,854	$	2,976,198
Less: Allowance for credit losses	(329)				(347)				(463)
Held-to-maturity securities, net of allowance for credit losses	$	3,810,015			$	3,856,916			$	3,606,391

Securities having a carrying value of $7.2 billion at March 31, 2024 as well as securities having a carrying value of $6.9 billion and $5.7 billion at December 31, 2023 and March 31, 2023, respectively, were pledged as collateral for public deposits, trust deposits, Federal Home Loan Bank (“FHLB”) advances and available lines of credit, securities sold under repurchase agreements and derivatives. At March 31, 2024, there were no securities of a single issuer, other than U.S. government-sponsored agency securities, which exceeded 10% of shareholders’ equity.

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Loans

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Loans

Loans

The following table shows the Company’s loan portfolio by category as of the dates shown:

	March 31,			December 31,			March 31,
(Dollars in thousands)	2024			2023			2023
Balance:
Commercial	$	13,503,481		$	12,832,053		$	12,576,985
Commercial real estate	11,633,437			11,344,164			10,239,078
Home equity	340,349			343,976			337,016
Residential real estate	2,890,266			2,769,666			2,505,545
Premium finance receivables—property & casualty	6,940,019			6,903,529			5,738,880
Premium finance receivables—life insurance	7,872,033			7,877,943			8,125,802
Consumer and other	51,121			60,500			42,165
Total loans, net of unearned income	$	43,230,706		$	42,131,831		$	39,565,471
Mix:
Commercial	31		%	30		%	32		%
Commercial real estate	27			27			26
Home equity	1			1			1
Residential real estate	7			7			6
Premium finance receivables—property & casualty	16			16			14
Premium finance receivables—life insurance	18			19			21
Consumer and other	0			0			0
Total loans, net of unearned income	100		%	100		%	100		%

The Company’s loan portfolio is generally comprised of loans to consumers and small to medium-sized businesses, which, for the commercial and commercial real estate portfolios, are located primarily within the geographic market areas that the banks serve. Various niche lending businesses, including franchise lending and insurance agency lending, operate on a national level. The premium finance receivables portfolios are made to customers throughout the United States and Canada. The Company strives to maintain a loan portfolio that is diverse in terms of loan type, industry, borrower, and geographic concentrations. Such diversification reduces the exposure to economic downturns that may occur in different segments of the economy or in different industries.

Certain premium finance receivables are recorded net of unearned income. The unearned income portions of such premium finance receivables were $260.2 million at March 31, 2024, $285.4 million at December 31, 2023 and $244.0 million at March 31, 2023.

Total loans, excluding purchased credit deteriorated (“PCD”) loans, include net deferred loan fees and costs and fair value purchase accounting adjustments totaling $84.9 million at March 31, 2024, $84.2 million at December 31, 2023 and $70.9 million at March 31, 2023.

It is the policy of the Company to review each prospective credit in order to determine the appropriateness and, when required, the adequacy of security or collateral necessary to obtain when making a loan. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to ensure access to collateral, in the event of default, through adherence to state lending laws and the Company’s credit monitoring procedures.

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Allowance for Credit Losses

3 Months Ended

Mar. 31, 2024

Credit Loss [Abstract]

Allowance for Credit Losses

Allowance for Credit Losses

In accordance with ASC 326, the Company is required to measure the allowance for credit losses of financial assets with similar risk characteristics on a collective or pooled basis. In considering the segmentation of financial assets measured at amortized cost into pools, the Company considered various risk characteristics in its analysis. Generally, the segmentation utilized represents the level at which the Company develops and documents its systematic methodology to determine the allowance for credit losses for the financial assets held at amortized cost, specifically the Company's loan portfolio and debt securities classified as held-to-maturity. Descriptions of the Company’s loan portfolio segments and major debt security types are included in Note (5) “Allowance for Credit Losses” of the 2023 Form 10-K.

In accordance with ASC 326, the Company elected to not measure an allowance for credit losses on accrued interest. As such accrued interest is written off in a timely manner when deemed uncollectible. Any such write-off of accrued interest will reverse previously recognized interest income. In addition, the Company elected to not include accrued interest within presentation and disclosures of the carrying amount of financial assets held at amortized cost. This election is applicable to the various disclosures included within the Company's financial statements. Accrued interest related to financial assets held at amortized cost is included within accrued interest receivable and other assets within the Company's Consolidated Statements of Condition and totaled $307.8 million at March 31, 2024, $304.5 million at December 31, 2023, and $245.1 million at March 31, 2023.

The tables below show the aging of the Company’s loan portfolio by the segmentation noted above at March 31, 2024, December 31, 2023 and March 31, 2023:

As of March 31, 2024			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	31,740	$	27	$	30,248	$	77,715	$	13,363,751	$	13,503,481
Commercial real estate
Construction and development	1,627		—		818		7,066		2,140,803		2,150,314
Non-construction	37,635		—		15,895		25,932		9,403,661		9,483,123
Home equity	838		—		212		1,617		337,682		340,349
Residential real estate, excluding early buy-out loans	17,901		—		—		24,523		2,704,492		2,746,916
Premium finance receivables
Property and casualty insurance loans	32,648		25,877		15,274		59,729		6,806,491		6,940,019
Life insurance loans	—		—		32,482		100,137		7,739,414		7,872,033
Consumer and other	19		47		16		210		50,829		51,121
Total loans, net of unearned income, excluding early buy-out loans	$	122,408	$	25,951	$	94,945	$	296,929	$	42,547,123	$	43,087,356
Early buy-out loans guaranteed by U.S. government agencies (1)	—		50,217		—		1,047		92,086		143,350
Total loans, net of unearned income	$	122,408	$	76,168	$	94,945	$	297,976	$	42,639,209	$	43,230,706

As of December 31, 2023			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	38,940	$	98	$	19,488	$	85,743	$	12,687,784	$	12,832,053
Commercial real estate
Construction and development	2,205		—		251		1,343		2,080,242		2,084,041
Non-construction	33,254		—		8,264		19,291		9,199,314		9,260,123
Home equity	1,341		—		62		2,263		340,310		343,976
Residential real estate, excluding early buy-out loans	15,391		—		2,325		22,942		2,578,425		2,619,083
Premium finance receivables
Property and casualty insurance loans	27,590		20,135		23,236		50,437		6,782,131		6,903,529
Life insurance loans	—		—		16,206		45,464		7,816,273		7,877,943
Consumer and other	22		54		25		165		60,234		60,500
Total loans, net of unearned income, excluding early buy-out loans	$	118,743	$	20,287	$	69,857	$	227,648	$	41,544,713	$	41,981,248
Early buy-out loans guaranteed by U.S. government agencies (1)	—		57,688		250		328		92,317		150,583
Total loans, net of unearned income	$	118,743	$	77,975	$	70,107	$	227,976	$	41,637,030	$	42,131,831

(1)Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

As of March 31, 2023			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	47,950	$	—	$	10,755	$	95,593	$	12,422,687	$	12,576,985
Commercial real estate
Construction and development	5,404		—		4,438		19,616		1,567,595		1,597,053
Non-construction	5,792		—		16,101		53,064		8,567,068		8,642,025
Home equity	1,190		—		116		1,118		334,592		337,016
Residential real estate, excluding early buy-out loans	11,333		104		74		19,183		2,278,699		2,309,393
Premium finance receivables
Property and casualty insurance loans	18,543		9,215		14,287		32,545		5,664,290		5,738,880
Life insurance loans	—		1,066		21,552		52,975		8,050,209		8,125,802
Consumer and other	6		87		10		379		41,683		42,165
Total loans, net of unearned income, excluding early buy-out loans	$	90,218	$	10,472	$	67,333	$	274,473	$	38,926,823	$	39,369,319
Early buy-out loans guaranteed by U.S. government agencies (1)	29,245		36,920		—		1,485		128,502		196,152
Total loans, net of unearned income	$	119,463	$	47,392	$	67,333	$	275,958	$	39,055,325	$	39,565,471

(1)Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

Credit Quality Indicators

Credit quality indicators, specifically the Company's internal risk rating systems, reflect how the Company monitors credit losses and represents factors used by the Company when measuring the allowance for credit losses. Descriptions of the Company’s credit quality indicators by financial asset are included in Note (5) “Allowance for Credit Losses” of the 2023 Form 10-K.

The table below shows the Company’s loan portfolio by credit quality indicator and year of origination at March 31, 2024:

	Year of Origination														Revolving		Total
(In thousands)	2024		2023		2022		2021		2020		Prior		Revolving		to Term		Loans
Loan Balances:
Commercial, industrial and other
Pass	$	970,127	$	2,650,822	$	1,998,311	$	1,433,144	$	590,652	$	1,200,791	$	3,979,064	$	5,677	$	12,828,588
Special mention	1,783		27,372		69,729		86,335		7,175		53,800		145,717		510		392,421
Substandard accrual	197		27,876		47,624		34,005		14,725		11,845		114,410		50		250,732
Substandard nonaccrual/doubtful	—		12,562		4,653		5,326		1,720		6,734		745		—		31,740
Total commercial, industrial and other	$	972,107	$	2,718,632	$	2,120,317	$	1,558,810	$	614,272	$	1,273,170	$	4,239,936	$	6,237	$	13,503,481
Construction and development
Pass	$	26,328	$	408,651	$	927,437	$	369,191	$	105,155	$	166,162	$	23,710	$	—	$	2,026,634
Special mention	—		417		—		17,091		—		15,143		—		—		32,651
Substandard accrual	—		—		2,495		35,215		2,480		49,212		—		—		89,402
Substandard nonaccrual/doubtful	—		499		—		—		—		1,128		—		—		1,627
Total construction and development	$	26,328	$	409,567	$	929,932	$	421,497	$	107,635	$	231,645	$	23,710	$	—	$	2,150,314
Non-construction
Pass	$	298,943	$	1,516,282	$	1,817,069	$	1,370,179	$	961,542	$	3,011,760	$	189,165	$	6,915	$	9,171,855
Special mention	—		10,190		34,072		46,822		22,865		52,411		—		—		166,360
Substandard accrual	—		1,174		2,480		1,972		19,098		82,549		—		—		107,273
Substandard nonaccrual/doubtful	—		883		453		192		—		36,107		—		—		37,635
Total non-construction	$	298,943	$	1,528,529	$	1,854,074	$	1,419,165	$	1,003,505	$	3,182,827	$	189,165	$	6,915	$	9,483,123
Home equity
Pass	$	—	$	—	$	—	$	—	$	—	$	9,518	$	314,674	$	1,271	$	325,463
Special mention	—		—		223		62		—		1,992		4,076		—		6,353
Substandard accrual	—		—		291		—		45		6,265		995		99		7,695
Substandard nonaccrual/doubtful	—		—		180		69		108		391		—		90		838
Total home equity	$	—	$	—	$	694	$	131	$	153	$	18,166	$	319,745	$	1,460	$	340,349
Residential real estate
Early buy-out loans guaranteed by U.S. government agencies	$	—	$	2,621	$	4,612	$	3,919	$	7,149	$	125,049	$	—	$	—	$	143,350
Pass	148,886		476,710		828,606		767,141		212,312		270,800		—		—		2,704,455

Special mention	—		1,842		3,945		2,610		1,310		5,191		—		—		14,898
Substandard accrual	64		908		2,157		490		1,023		5,020		—		—		9,662
Substandard nonaccrual/doubtful	—		98		4,474		4,553		798		7,978		—		—		17,901
Total residential real estate	$	148,950	$	482,179	$	843,794	$	778,713	$	222,592	$	414,038	$	—	$	—	$	2,890,266
Premium finance receivables - property and casualty
Pass	$	3,462,480	$	3,350,889	$	—	$	10,835	$	1,043	$	—	$	—	$	—	$	6,825,247
Special mention	23,586		53,219		121		44		—		—		—		—		76,970
Substandard accrual	598		4,460		92		4		—		—		—		—		5,154
Substandard nonaccrual/doubtful	451		31,397		753		45		2		—		—		—		32,648
Total premium finance receivables - property and casualty	$	3,487,115	$	3,439,965	$	966	$	10,928	$	1,045	$	—	$	—	$	—	$	6,940,019
Premium finance receivables - life
Pass	$	997,609	$	6,871,203	$	3,221	$	—	$	—	$	—	$	—	$	—	$	7,872,033
Special mention	—		—		—		—		—		—		—		—		—
Substandard accrual	—		—		—		—		—		—		—		—		—
Substandard nonaccrual/doubtful	—		—		—		—		—		—		—		—		—
Total premium finance receivables - life	$	997,609	$	6,871,203	$	3,221	$	—	$	—	$	—	$	—	$	—	$	7,872,033
Consumer and other
Pass	$	610	$	3,092	$	935	$	760	$	73	$	3,670	$	41,790	$	—	$	50,930
Special mention	—		8		14		7		—		77		1		—		107
Substandard accrual	—		14		13		—		—		29		9		—		65
Substandard nonaccrual/doubtful	—		7		9		3		—		—		—		—		19
Total consumer and other	$	610	$	3,121	$	971	$	770	$	73	$	3,776	$	41,800	$	—	$	51,121
Total loans
Early buy-out loans guaranteed by U.S. government agencies	$	—	$	2,621	$	4,612	$	3,919	$	7,149	$	125,049	$	—	$	—	$	143,350
Pass	5,904,983		15,277,649		5,575,579		3,951,250		1,870,777		4,662,701		4,548,403		13,863		41,805,205
Special mention	25,369		93,048		108,104		152,971		31,350		128,614		149,794		510		689,760
Substandard accrual	859		34,432		55,152		71,686		37,371		154,920		115,414		149		469,983
Substandard nonaccrual/doubtful	451		45,446		10,522		10,188		2,628		52,338		745		90		122,408
Total loans	$	5,931,662	$	15,453,196	$	5,753,969	$	4,190,014	$	1,949,275	$	5,123,622	$	4,814,356	$	14,612	$	43,230,706
Gross write offs
Three months ended March 31, 2024	99		13,085		2,129		660		1,965		5,903		—		—		23,841

Held-to-maturity debt securities

The Company conducts an assessment of its investment securities, including those classified as held-to-maturity, at the time of purchase and on at least an annual basis to ensure such investment securities remain within appropriate levels of risk and continue to perform satisfactorily in fulfilling its obligations. The Company considers, among other factors, the nature of the securities and credit ratings or financial condition of the issuer. If available, the Company obtains a credit rating for issuers from a Nationally Recognized Statistical Rating Organization (“NRSRO”) for consideration. If no such rating is available for an issuer, the Company performs an internal rating based on the scale utilized within the loan portfolio as discussed above. For purposes of the table below, the Company has converted any issuer rating from an NRSRO into the Company’s internal ratings based on Investment Policy and review by the Company’s management.

As of March 31, 2024	Year of Origination												Total
(In thousands)	2024		2023		2022		2021		2020		Prior		Balance
Amortized Cost Balances:
U.S. government agencies
1-4 internal grade	$	—	$	—	$	156,875	$	147,813	$	25,000	$	6,775	$	336,463
5-7 internal grade													—
8-10 internal grade													—
Total U.S. government agencies	$	—	$	—	$	156,875	$	147,813	$	25,000	$	6,775	$	336,463
Municipal
1-4 internal grade	$	—	$	4,176	$	1,037	$	6,886	$	258	$	156,133	$	168,490
5-7 internal grade													—
8-10 internal grade													—
Total municipal	$	—	$	4,176	$	1,037	$	6,886	$	258	$	156,133	$	168,490
Mortgage-backed securities
1-4 internal grade	$	—	$	372,240	$	566,684	$	2,309,095	$	—	$	—	$	3,248,019
5-7 internal grade													—
8-10 internal grade													—
Total mortgage-backed securities	$	—	$	372,240	$	566,684	$	2,309,095	$	—	$	—	$	3,248,019
Corporate notes
1-4 internal grade	$	—	$	—	$	14,967	$	—	$	6,006	$	36,399	$	57,372
5-7 internal grade													—
8-10 internal grade													—
Total corporate notes	$	—	$	—	$	14,967	$	—	$	6,006	$	36,399	$	57,372
Total held-to-maturity securities													$	3,810,344
Less: Allowance for credit losses													(329)
Held-to-maturity securities, net of allowance for credit losses													$	3,810,015

Measurement of Allowance for Credit Losses

The Company's allowance for credit losses consists of the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity debt security losses. In accordance with ASC 326, the Company measures the allowance for credit losses at the time of origination or purchase of a financial asset, representing an estimate of lifetime expected credit losses on the related asset. When developing its estimate, the Company considers available information relevant to assessing the collectability of cash flows, from both internal and external sources. Historical credit loss experience is one input in the estimation process as well as inputs relevant to current conditions and reasonable and supportable forecasts. In considering past events, the Company considers the relevance, or lack thereof, of historical information due to changes in such things as financial asset underwriting or collection practices, and changes in portfolio mix due to changing business plans and strategies. In considering current conditions and forecasts, the Company considers both the current economic environment and the forecasted direction of the economic environment with emphasis on those factors deemed relevant to or driving changes in expected credit losses. As significant judgment is required, the review of the appropriateness of the allowance for credit losses is performed quarterly by various committees with participation by the Company's executive management.

	March 31,		December 31,		March 31,
(In thousands)	2024		2023		2023
Allowance for loan losses	$	348,612	$	344,235	$	287,972
Allowance for unfunded lending-related commitments losses	78,563		83,030		87,826
Allowance for loan losses and unfunded lending-related commitments losses	427,175		427,265		375,798
Allowance for held-to-maturity securities losses	329		347		463
Allowance for credit losses	$	427,504	$	427,612	$	376,261

The allowance for credit losses is measured on a collective or pooled basis when similar risk characteristics exist, based upon the segmentation discussed above. The Company utilizes modeling methodologies that estimate lifetime credit loss rates on each pool, including methodologies estimating the probability of default and loss given default on specific segments. Historical credit loss history is adjusted for reasonable and supportable forecasts developed by the Company on a quantitative or qualitative basis and incorporates third party economic forecasts. Reasonable and supportable forecasts consider the macroeconomic factors that are most relevant to evaluating and predicting expected credit losses in the Company's financial assets. Currently, the Company utilizes an eight quarter forecast period using a single macroeconomic scenario provided by a

third party and reviewed within the Company's governance structure. For periods beyond the ability to develop reasonable and supportable forecasts, the Company reverts to historical loss rates at an input level, straight-line over a four quarter reversion period. Expected credit losses are measured over the contractual term of the financial asset with consideration of expected prepayments. Expected extensions, renewals or modifications of the financial asset are considered when the expected extension, renewal or modification is contained within the existing agreement and is not unconditionally cancelable. The methodologies discussed above are applied to both current asset balances on the Company's Consolidated Statements of Condition and off-balance sheet commitments (i.e. unfunded lending-related commitments).

Assets that do not share similar risk characteristics with a pool are assessed for the allowance for credit losses on an individual basis. These typically include assets experiencing financial difficulties, including assets rated as substandard nonaccrual and doubtful. If foreclosure is probable or the asset is considered collateral-dependent, expected credit losses are measured based upon the fair value of the underlying collateral adjusted for selling costs, if appropriate. Underlying collateral across the Company's segments consist primarily of real estate, land and construction assets as well as general business assets of the borrower. As of March 31, 2024, excluding loans carried at fair value, substandard nonaccrual loans totaling $52.8 million in carrying balance had no related allowance for credit losses.

The Company does not measure an allowance for credit losses on accrued interest receivable balances because these balances are written off in a timely manner as a reduction to interest income when assets are placed on nonaccrual status.

Loan portfolios

A summary of activity in the allowance for credit losses, specifically for the loan portfolio (i.e. allowance for loan losses and allowance for unfunded commitment losses), for the three months ended March 31, 2024 and March 31, 2023 is as follows:

Three months ended March 31, 2024			Commercial Real Estate		Home  Equity		Residential Real Estate		Premium Finance Receivables		Consumer and Other		Total Loans
(In thousands)	Commercial
Allowance for credit losses at beginning of period	$	169,604	$	223,853	$	7,116	$	13,133	$	13,069	$	490	$	427,265
Other adjustments	—		—		—		—		(31)		—		(31)
Charge-offs	(11,215)		(5,469)		(74)		(38)		(6,938)		(107)		(23,841)
Recoveries	479		31		29		2		1,527		23		2,091
Provision for credit losses	7,650		7,637		120		604		5,703		(23)		21,691
Allowance for credit losses at period end	$	166,518	$	226,052	$	7,191	$	13,701	$	13,330	$	383	$	427,175
By measurement method:
Individually measured	$	13,989	$	1,784	$	—	$	59	$	—	$	9	$	15,841
Collectively measured	152,529		224,268		7,191		13,642		13,330		374		411,334
Loans at period end
Individually measured	$	31,740	$	39,262	$	838	$	17,509	$	—	$	19	$	89,368
Collectively measured	13,471,741		11,594,175		339,511		2,728,392		14,812,052		51,102		42,996,973
Loans held at fair value	—		—		—		144,365		—		—		144,365

Three months ended March 31, 2023	Commercial		Commercial Real Estate		Home  Equity		Residential Real Estate		Premium Finance Receivables		Consumer and Other		Total Loans
(In thousands)
Allowance for credit losses at beginning of period	$	142,769	$	184,352	$	7,573	$	11,585	$	10,671	$	498	$	357,448
Cumulative effect adjustment from the adoption of ASU 2022-02 (TDR), net of tax	111		1,356		(33)		(692)		—		(1)		741
Other adjustments	—		—		—		—		4		—		4
Charge-offs	(2,543)		(5)		—		—		(4,650)		(153)		(7,351)
Recoveries	392		100		35		4		1,323		32		1,886
Provision for credit losses	8,772		8,977		153		537		4,607		24		23,070
Allowance for credit losses at period end	$	149,501	$	194,780	$	7,728	$	11,434	$	11,955	$	400	$	375,798
By measurement method:
Individually measured	$	11,281	$	1,621	$	—	$	—	$	—	$	1	$	12,903
Collectively measured	138,220		193,159		7,728		11,434		11,955		399		362,895
Loans at period end
Individually measured	$	47,950	$	11,196	$	1,190	$	11,280	$	—	$	6	$	71,622
Collectively measured	12,529,035		10,227,882		335,826		2,286,733		13,864,682		42,159		39,286,317
Loans held at fair value	—		—		—		207,532		—		—		207,532

For the three months ended March 31, 2024 and March 31, 2023, the Company recognized approximately $21.7 million and $23.1 million of provision for credit losses, respectively, related to loans and lending agreements. The provision for each period was primarily the result of loan growth as well as the Company’s macroeconomic forecasts of key model inputs, most notably, Baa corporate credit spreads and the Commercial Real Estate Pricing Index (“CREPI”). Uncertainties remain regarding expected economic performance and macroeconomic forecasts utilized in the measurement of the allowance for credit losses as of March 31, 2024. Another key driver of provision for credit losses in these portfolios was loan risk rating migration. Net charge-offs in the three month periods ending March 31, 2024 and March 31, 2023, totaled $21.8 million and $5.5 million, respectively.

Held-to-maturity debt securities

The allowance for credit losses on the Company’s held-to-maturity debt securities is presented as a reduction to the amortized cost basis of held-to-maturity securities on the Company's Consolidated Statements of Condition. For the three month period ended March 31, 2024 and 2023, the Company recognized approximately $(18,000) and $(25,000), respectively, of provision for credit losses related to held-to-maturity securities. At March 31, 2024 and March 31, 2023, the Company did not identify any held-to-maturity debt securities within its portfolio that would require a charge-off.

Loan Modifications to Borrowers Experiencing Financial Difficulties

The Company’s approach to restructuring or modifying loans is built on its credit risk rating system, which requires credit management personnel to assign a credit risk rating to each loan. In each case, the loan officer is responsible for recommending a credit risk rating for each loan and ensuring the credit risk ratings are appropriate. These credit risk ratings are then reviewed and approved by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors, including a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. The Company’s credit risk rating scale is one through ten with higher scores indicating higher risk. In the case of loans rated six or worse following modification, the Company’s Managed Assets Division evaluates the loan and the credit risk rating and determines that the loan has been restructured to be reasonably assured of repayment and of performance according to the modified terms and is supported by a current, well-documented credit assessment of the borrower’s financial condition and prospects for repayment under the revised terms. Based on the Company’s credit risk rating system, it considers that borrowers whose credit risk rating is 5 or better are not experiencing financial difficulties.

Restructurings may arise when, due to financial difficulties experienced by the borrower, the Company obtains through physical possession one or more collateral assets in satisfaction of all or part of an existing credit. Once possession is obtained, the Company reclassifies the appropriate portion of the remaining balance of the credit from loans to other real estate owned (“OREO”), which is included within other assets in the Consolidated Statements of Condition. For any residential real estate property collateralizing a consumer mortgage loan, the Company is considered to possess the related collateral only if legal title is obtained upon completion of foreclosure, or the borrower conveys all interest in the residential real estate property to the Company through completion of a deed in lieu of foreclosure or similar legal agreement. At March 31, 2024, the Company had $1,146,000 of foreclosed residential real estate properties included within OREO. Further, the recorded investment in

residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $49.6 million and $53.4 million at March 31, 2024 and 2023, respectively.

The tables below presents a summary of the period-end balance of loans to borrowers experiencing financial difficulties during the three months ended March 31, 2024 and 2023:

Three months ended March 31, 2024  (Dollars in thousands)	Total		Percentage of Total Class of Loan		Extension of Term		Reduction of  Interest Rate		Delay in Contractual Payments		Extension of Term and Reduction of Interest Rate
Commercial
Commercial, industrial and other	$	1,629	0.0	%	$	1,502	$	—	$	—	$	127
Commercial real estate
Non-construction	1,176		0.0		293		—		883		—
Home equity	98		0.0		98		—		—		—
Residential real estate	218		0.0		35		183		—		—
Premium finance receivables
Property and casualty insurance loans	1		0.0		1		—		—		—
Total loans	$	3,122	0.0	%	$	1,929	$	183	$	883	$	127

			Weighted average magnitude of modifications:
Three months ended March 31, 2024  (Dollars in thousands)	Total		Duration of Extension of Term (months)	Reduction of  Interest Rate (bps)	Duration of Delay in Contractual Payments (months)
Commercial
Commercial, industrial and other	$	1,629	10	219	—
Commercial real estate
Non-construction	1,176		47	—	16
Home equity	98		12	—	—
Residential real estate	218		37	201	—
Premium finance receivables
Property and casualty insurance loans	1		0	—	—
Total loans	$	3,122	16	215	16

Three Months Ended March 31, 2023 (Dollars in thousands)	Total		Percentage of Total Class of Loan		Extension of Term		Reduction of  Interest Rate		Delay in Contractual Payments		Extension of Term and Reduction of Interest Rate
Commercial
Commercial, industrial and other	$	37,474	0.3	%	$	1,938	$	221	$	35,265	$	50
Commercial real estate
Non-construction	1,333		0.0		467		827		39		—
Home equity	203		0.1		203		—		—		—
Residential real estate	1,708		0.1		1,253		271		—		184
Premium finance receivables
Property and casualty insurance loans	11		0.0		3		—		—		8
Total loans	$	40,729	0.1	%	$	3,864	$	1,319	$	35,304	$	242

			Weighted average magnitude of modifications:
Three months ended March 31, 2023 (Dollars in thousands)	Total		Duration of Extension of Term (months)	Reduction of  Interest Rate (bps)	Duration of Delay in Contractual Payments (months)
Commercial
Commercial, industrial and other	$	37,474	10	52	16
Commercial real estate
Non-construction	1,333		51	342	101
Home equity	203		12	—	—
Residential real estate	1,708		45	290	—
Premium finance receivables
Property and casualty insurance loans	11		0	50	—
Total loans	$	40,729	27	275	17

The Company had commitments of $4.2 million and $32.2 million as of March 31,2024 and March 31, 2023, respectively, to lend additional funds to borrowings experiencing financial difficulty and for whom the Company has modified the terms of loans in the form of principal forgiveness, an interest rate reduction, an other-than insignificant payment delay or a term extension during the periods presented.

The following table presents a summary of all modified loans for borrowers experiencing financial difficulties and such loans that were in payment default under the restructured terms during the respective periods below.

(Dollars in thousands)	For the Twelve Months Ended March 31, 2024		Three Months Ended March 31, 2024		For the Three Months Ended March 31, 2023		Three Months Ended March 31, 2023
	Total		Payments in Default  (1)		Total		Payments in Default  (1)
Commercial
Commercial, industrial and other	$	16,011	$	244	$	37,474	$	2
Commercial real estate
Construction and development	2,495		—		—		—
Non-construction	6,161		603		1,333		828
Home equity	616		19		203		104
Residential real estate	612		144		1,708		—
Premium finance receivables
Property and casualty insurance loans	81		—		11		11
Total loans	$	25,976	$	1,010	$	40,729	$	945

(1)Modified loans considered to be in payment default are over 30 days past due subsequent to the restructuring.

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Goodwill and Other Acquisition-Related Intangible Assets

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Acquisition-Related Intangible Assets

Goodwill and Other Acquisition-Related Intangible Assets

A summary of the Company’s goodwill assets by reporting unit is presented in the following table:

(In thousands)	December 31, 2023		Goodwill Acquired		Impairment Loss		Goodwill Adjustments		March 31, 2024
Community banking	$	545,671	$	—	$	—	$	—	$	545,671
Specialty finance	39,006		—		—		(491)		38,515
Wealth management	71,995		—		—		—		71,995
Total	$	656,672	$	—	$	—	$	(491)	$	656,181

The specialty finance unit’s goodwill decreased $491,000 in the first three months of 2024 as a result of foreign currency translation adjustments related to the Canadian acquisitions.

The Company assesses each reporting unit’s goodwill for impairment on at least an annual basis and considers potential indicators of impairment at each reporting date between annual goodwill impairment tests. At October 1, 2023, the Company utilized a qualitative approach for its annual goodwill impairment tests of the community banking, specialty finance and wealth management reporting units and determined that it was more likely than not that the fair value of all reporting units exceeded the respective carrying value of such reporting unit at that time.

At each reporting date between annual goodwill impairment tests, the Company considers potential indicators of impairment. The Company assessed whether events and circumstances resulted in it being more likely than not that the fair value of any reporting unit was less than its carrying value. Potential impairment indicators considered include the condition of the economy and banking industry; government intervention and regulatory updates; the impact of recent events to financial performance and cost factors of the reporting units; performance of the Company’s stock and other relevant events.

At the conclusion of this assessment of all reporting units, the Company determined that as of March 31, 2024, it was more likely than not that the fair value of all reporting units exceeded the respective carrying value of such reporting unit.

A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of March 31, 2024 is as follows:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	55,206	$	55,206	$	55,206
Accumulated amortization	(46,899)		(46,125)		(43,473)
Net carrying amount	$	8,307	$	9,081	$	11,733
Trademark with indefinite lives:
Carrying amount	5,800		5,800		5,800
Total net carrying amount	$	14,107	$	14,881	$	17,533
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,962	$	1,963	$	1,962
Accumulated amortization	(1,849)		(1,837)		(1,799)
Net carrying amount	$	113	$	126	$	163
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	26,630	$	26,630	$	20,430
Accumulated amortization	(19,120)		(18,748)		(17,175)
Net carrying amount	$	7,510	$	7,882	$	3,255
Total acquisition-related intangible assets:
Gross carrying amount	$	89,598	$	89,599	$	83,398
Accumulated amortization	(67,868)		(66,710)		(62,447)
Total other acquisition-related intangible assets, net	$	21,730	$	22,889	$	20,951

Estimated amortization
Actual in three months ended March 31, 2024	$	1,158
Estimated remaining in 2024	3,143
Estimated—2025	3,482
Estimated—2026	2,772
Estimated—2027	2,156
Estimated—2028	1,591

The core deposit intangibles recognized in connection with prior bank acquisitions are amortized over a ten-year period on an accelerated basis. The customer list intangibles recognized in connection with the purchase of life insurance premium finance assets in 2009 are being amortized over an 18-year period on an accelerated basis. The customer list and other intangibles recognized in connection with prior acquisitions within the wealth management segment are being amortized over a period of up to ten years on a straight-line basis. The increase in wealth management segment customer list and other intangibles as compared to March 31, 2023 relates to the acquisition in the second quarter 2023 which is being amortized over a period of ten years on an accelerated basis. Indefinite-lived intangible assets consist of certain trade and domain names recognized in connection with the acquisition of certain assets of Veterans First Mortgage in 2018. As indefinite-lived intangible assets are not amortized, the Company assesses impairment on at least an annual basis.

Total amortization expense associated with finite-lived acquisition-related intangibles totaled approximately $1.2 million for the three months ended March 31, 2024 and 2023.

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Mortgage Servicing Rights ("MSRs")

3 Months Ended

Mar. 31, 2024

Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]

Mortgage Servicing Rights (MSRs)

Mortgage Servicing Rights (“MSRs”)

The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated:

	Three Months Ended
	March 31,		March 31,
(In thousands)	2024		2023
Fair value at beginning of the period	$	192,456	230,225
Additions from loans sold with servicing retained	5,379		5,107
Estimate of changes in fair value due to:
Payoffs, paydowns and repurchases	(4,386)		(3,909)
Changes in valuation inputs or assumptions	7,595		(6,953)
Fair value at end of the period	$	201,044	$	224,470
Unpaid principal balance of mortgage loans serviced for others	$	12,051,392	$	14,080,461

The Company recognizes MSR assets upon the sale of residential real estate loans to external third parties when it retains the obligation to service the loans and the servicing fee is more than adequate compensation. MSRs are included in other assets in the Consolidated Statements of Condition. The initial recognition of MSR assets from loans sold with servicing retained and subsequent changes in fair value of all MSRs are recognized in mortgage banking revenue. MSRs are subject to changes in value from actual and expected prepayment of the underlying loans.

The estimation of fair value related to MSRs is partly impacted by the Company exercising its early buyout options (“EBO”) on eligible loans previously sold to the Government National Mortgage Association (“GNMA”). Under such optional repurchase program, financial institutions acting as servicers are allowed to buy back from the securitized loan pool individual delinquent mortgage loans meeting certain criteria for which the institution was the original transferor of such loans. At the option of the servicer and without prior authorization from GNMA, the servicer may repurchase such delinquent loans for an amount equal to the remaining principal balance of the loan. At the time of such repurchase, any MSR value related to such loans is derecognized.

The MSR asset fair value is determined by using a discounted cash flow model that incorporates the objective characteristics of the portfolio as well as subjective valuation parameters that purchasers of servicing would apply to such portfolios sold into the secondary market. The subjective factors include loan prepayment speeds, discount rates, servicing costs and other economic factors. The Company uses a third party to assist in the valuation of MSRs.

Periodically, the Company will purchase options for the right to purchase securities not currently held within the banks’ investment portfolios or enter into interest rate swaps in which the Company elects not to designate such derivatives as hedging instruments. These option and swap transactions are designed primarily to economically hedge a portion of the fair value adjustments related to the Company’s MSRs. The gain or loss associated with these derivative contracts is included in mortgage banking revenue. For more information regarding these hedges outstanding as of March 31, 2024 and March 31, 2023, see Note (14) “Derivative Financial Instruments” in Item 1 of this report.

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Deposits

3 Months Ended

Mar. 31, 2024

Deposits [Abstract]

Deposits

Deposits

The following table is a summary of deposits as of the dates shown: 

(Dollars in thousands)	March 31, 2024			December 31, 2023			March 31, 2023
Balance:
Non-interest-bearing	$	9,908,183		$	10,420,401		$	11,236,083
NOW and interest-bearing demand deposits	5,720,947			5,797,649			5,576,558
Wealth management deposits	1,347,817			1,614,499			1,809,933
Money market	15,617,717			15,149,215			13,552,277
Savings	5,959,774			5,790,334			5,192,108
Time certificates of deposit	7,894,420			6,625,072			5,351,252
Total deposits	$	46,448,858		$	45,397,170		$	42,718,211
Mix:
Non-interest-bearing	21		%	23		%	26		%
NOW and interest-bearing demand deposits	12			13			13
Wealth management deposits	3			4			4
Money market	34			33			32
Savings	13			13			12
Time certificates of deposit	17			14			13
Total deposits	100		%	100		%	100		%

Wealth management deposits represent deposit balances (primarily money market accounts) at the Company’s subsidiary banks from brokerage customers of Wintrust Investments, LLC (“Wintrust Investments”), Chicago Deferred Exchange Company (“CDEC”) and trust and asset management customers of the Company.

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FHLB Advances, Other Borrowings and Subordinated Notes

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

FHLB Advances, Other Borrowings and Subordinated Notes

FHLB Advances, Other Borrowings and Subordinated Notes

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
FHLB advances	$	2,676,751	$	2,326,071	$	2,316,071
Other borrowings:
Notes payable	164,153		171,282		192,666
Short-term borrowings	10,869		13,430		10,124
Secured borrowings	341,704		401,897		320,007
Other	58,682		59,204		60,751
Total other borrowings	575,408		645,813		583,548
Subordinated notes	437,965		437,866		437,493
Total FHLB advances, other borrowings and subordinated notes	$	3,690,124	$	3,409,750	$	3,337,112

Descriptions of the Company’s FHLB advances, other borrowings, and subordinated notes are included in Note (11) “Federal Home Loan Bank Advances”, Note (12) “Subordinated Notes” and Note (13) “Other Borrowings” of the 2023 Form 10-K.

Notes Payable

Notes payable balances represent the balances on the Company’s credit agreement with certain unaffiliated banks. At March 31, 2024, the outstanding principal balance under the term loan facility was $164.2 million and there was no outstanding balance under the revolving credit facility. Borrowings under notes payable are secured by pledges of and first priority perfected security interests in the Company’s equity interest in its bank subsidiaries and contain several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and other indebtedness. At March 31, 2024, the Company was in compliance with all such covenants.

Short-term Borrowings

Short-term borrowings include securities sold under repurchase agreements of customer sweep accounts in connection with master repurchase agreement at the banks. These borrowings totaled $10.9 million at March 31, 2024 compared to $13.4 million and $10.1 million at December 31, 2023 and March 31, 2023, respectively. As of March 31, 2024, the Company had pledged securities related to its customer balances in sweep accounts of $16.6 million. Securities pledged for customer balances in sweep accounts and short-term borrowings from brokers are maintained under the Company’s control and consist of mortgage-backed securities. These securities are included in the available-for-sale portfolio as reflected on the Company’s Consolidated Statements of Condition.

The following is a summary of these securities pledged as of March 31, 2024 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(In thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	16,632
Excess collateral	5,763
Securities sold under repurchase agreements	$	10,869

Secured Borrowings

The balance of secured borrowings primarily represents a third party Canadian transaction (“Canadian Secured Borrowing”). Under the Canadian Secured Borrowing, the Company, through its subsidiary, FIFC Canada, sells an undivided co-ownership interest in all receivables owed to FIFC Canada to an unrelated third party in exchange for cash payments pursuant to a receivables purchase agreement (“Receivables Purchase Agreement”). On May 31, 2023, the Company entered into the eleventh amending agreement to the Receivables Purchase Agreement dated as of December 16, 2014. The amended Receivables Purchase Agreement provides for, among other things, an extension of the maturity date to December 15, 2024, an increase to the facility limit from $420 million to $520 million, and a fee rate increase from 0.775% to 0.825%. Additionally, since Canadian Dollar Offered Rate (“CDOR”) will cease being used in Canada in June 2024, references to CDOR changed to the Benchmark rate.

At March 31, 2024, the translated balance of the secured borrowings totaled $332.4 million compared to $392.5 million at December 31, 2023 and $310.6 million at March 31, 2023. The interest rate under the Receivables Purchase Agreement is the Canadian Commercial Paper Rate plus fee rate of 0.825%.

The remaining $9.3 million, $9.4 million and $9.4 million within secured borrowings at March 31, 2024, December 31, 2023 and March 31, 2023, respectively, represent other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties.

Other Borrowings

Other borrowings represent a fixed-rate promissory note (“Fixed-Rate Promissory Note”) issued by the Company in June 2017. Subsequent amendments to the Fixed-Rate Promissory Note since issuance increased the principal amount to $66.4 million, reduced the interest rate to 1.70% and extended the maturity date to March 31, 2025. The Fixed-Rate Promissory Note contains several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and indebtedness. At March 31, 2024, the Company was in compliance with all such covenants.

Subordinated Notes

At March 31, 2024, the Company had outstanding subordinated notes totaling $438.0 million compared to $437.9 million and $437.5 million at December 31, 2023 and March 31, 2023, respectively. In 2019, the Company issued $300.0 million of subordinated notes receiving $296.7 million in proceeds, net of underwriting discount. The notes have a stated interest rate of 4.85% and mature in June 2029. In 2014, the Company issued $140.0 million of subordinated notes receiving $139.1 million in proceeds, net of underwriting discount. The notes have a stated interest rate of 5.00% and mature in June 2024.

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Junior Subordinated Debentures

3 Months Ended

Mar. 31, 2024

Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]

Junior Subordinated Debentures

Junior Subordinated Debentures

The following table provides a summary of the Company’s junior subordinated debentures as of March 31, 2024. The junior subordinated debentures represent the par value of the obligations owed to the Trusts.

(Dollars in thousands)	Common Securities		Trust  Preferred Securities		Junior Subordinated Debentures		Rate Structure (1)	Contractual Rate at 3/31/2024		Issue Date	Maturity Date	Earliest Redemption Date
Wintrust Capital Trust III	$	774	$	25,000	$	25,774	S+0.26161+3.25	8.83	%	04/2003	04/2033	04/2008
Wintrust Statutory Trust IV	619		20,000		20,619		S+0.26161+2.80	8.36	%	12/2003	12/2033	12/2008
Wintrust Statutory Trust V	1,238		40,000		41,238		S+0.26161+2.60	8.16	%	05/2004	05/2034	06/2009
Wintrust Capital Trust VII	1,550		50,000		51,550		S+0.26161+1.95	7.54	%	12/2004	03/2035	03/2010
Wintrust Capital Trust VIII	1,238		25,000		26,238		S+0.26161+1.45	7.01	%	08/2005	09/2035	09/2010
Wintrust Capital Trust IX	1,547		50,000		51,547		S+0.26161+1.63	7.22	%	09/2006	09/2036	09/2011
Northview Capital Trust I	186		6,000		6,186		S+0.26161+3.00	8.57	%	08/2003	11/2033	08/2008
Town Bankshares Capital Trust I	186		6,000		6,186		S+0.26161+3.00	8.57	%	08/2003	11/2033	08/2008
First Northwest Capital Trust I	155		5,000		5,155		S+0.26161+3.00	8.56	%	05/2004	05/2034	05/2009
Suburban Illinois Capital Trust II	464		15,000		15,464		S+0.26161+1.75	7.34	%	12/2006	12/2036	12/2011
Community Financial Shares Statutory Trust II	109		3,500		3,609		S+0.26161+1.62	7.21	%	06/2007	09/2037	06/2012
Total					$	253,566		7.77	%

(1)The interest rates on the variable rate junior subordinated debentures are based on the three-month Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) and reset on a quarterly basis.

The junior subordinated debentures totaled $253.6 million at March 31, 2024, December 31, 2023 and March 31, 2023. At March 31, 2024, the weighted average contractual interest rate on the junior subordinated debentures was 7.77%.

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Segment Information

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management.

The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures, and economic characteristics.

For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note (10) “Deposits” in Item 1 of this report for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment’s risk-weighted assets.

The segment financial information provided in the following table has been derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in Note (1) “Summary of Significant Accounting Policies” of the 2023 Form 10-K. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment.

The following is a summary of certain operating information for reportable segments:

	Three Months Ended				$ Change in Contribution		% Change  in Contribution
(Dollars in thousands)	March 31, 2024		March 31, 2023
Net interest income:
Community Banking	$	363,685	$	369,848	$	(6,163)	(2)	%
Specialty Finance	82,282		70,351		11,931		17
Wealth Management	7,758		8,955		(1,197)		(13)
Total Operating Segments	453,725		449,154		4,571		1
Intersegment Eliminations	10,469		8,841		1,628		18
Consolidated net interest income	$	464,194	$	457,995	$	6,199	1	%
Provision for credit losses:
Community Banking	$	20,392	$	21,099	$	(707)	(3)	%
Specialty Finance	1,281		1,946		(665)		(34)
Wealth Management	—		—		—		—
Total Operating Segments	21,673		23,045		(1,372)		(6)
Intersegment Eliminations	—		—		—		—
Consolidated provision for credit losses	$	21,673	$	23,045	$	(1,372)	(6)	%
Non-interest income:
Community Banking	$	74,636	$	68,733	$	5,903	9	%
Specialty Finance	27,317		25,790		1,527		6
Wealth Management	58,485		30,297		28,188		93
Total Operating Segments	160,438		124,820		35,618		29
Intersegment Eliminations	(19,858)		(17,051)		(2,807)		16
Consolidated non-interest income	$	140,580	$	107,769	$	32,811	30	%
Net revenue:
Community Banking	$	438,321	$	438,581	$	(260)	0	%
Specialty Finance	109,599		96,141		13,458		14
Wealth Management	66,243		39,252		26,991		69
Total Operating Segments	614,163		573,974		40,189		7
Intersegment Eliminations	(9,389)		(8,210)		(1,179)		14
Consolidated net revenue	$	604,774	$	565,764	$	39,010	7	%
Segment profit:
Community Banking	$	120,046	$	134,232	$	(14,186)	(11)	%
Specialty Finance	42,523		36,737		5,786		16
Wealth Management	24,725		9,229		15,496		168
Consolidated net income	$	187,294	$	180,198	$	7,096	4	%
Segment assets:
Community Banking	$	45,720,014	$	41,611,980	$	4,108,034	10	%
Specialty Finance	10,713,783		9,841,044		872,739		9
Wealth Management	1,143,136		1,420,487		(277,351)		(20)
Consolidated total assets	$	57,576,933	$	52,873,511	$	4,703,422	9	%

NM - Not meaningful

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Derivative Financial Instruments

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

The Company primarily enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one party delivering cash to the other party based on a notional amount and an underlying term (such as a rate, security price or price index or commodity price) as specified in the contract. The amount of cash delivered from one party to the other is determined based on the interaction of the notional amount of the contract with the underlying term. Derivatives are also implicit in certain contracts and commitments.

The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: (1) interest rate swaps and collars to manage the interest rate risk of certain fixed and variable rate assets and variable rate liabilities; (2) interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market; (3) forward commitments for the future delivery of such mortgage loans to protect the Company from adverse changes in interest rates and corresponding changes in the value of mortgage loans held-for-sale; (4) covered call options to

economically hedge specific investment securities and receive fee income, effectively enhancing the overall yield on such securities to compensate for net interest margin compression; and (5) options and swaps to economically hedge a portion of the fair value adjustments related to the Company’s mortgage servicing rights portfolio. The Company also enters into derivatives (typically interest rate swaps and commodity forward contracts) with certain qualified borrowers to facilitate the borrowers’ risk management strategies and concurrently enters into mirror-image derivatives with a third party counterparty, effectively making a market in the derivatives for such borrowers. Additionally, the Company enters into foreign currency contracts to manage foreign exchange risk associated with certain foreign currency denominated assets.

The Company recognizes derivative financial instruments in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. Changes in the fair value of derivative financial instruments are either recognized in income or in shareholders’ equity as a component of accumulated other comprehensive income or loss depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value hedge or cash flow hedge.

Changes in fair values of derivatives accounted for as fair value hedges are recorded in income in the same period and in the same income statement line as changes in the fair values of the hedged items that relate to the hedged risk(s). Changes in fair values of derivative financial instruments accounted for as cash flow hedges are recorded as a component of accumulated other comprehensive income or loss, net of deferred taxes, and reclassified to earnings when the hedged transaction affects earnings. Changes in fair values of derivative financial instruments not designated in a hedging relationship pursuant to ASC 815 are reported in non-interest income during the period of the change. Derivative financial instruments are valued by a third party and are corroborated by comparison with valuations provided by the respective counterparties. Fair values of certain mortgage banking derivatives (interest rate lock commitments and forward commitments to sell mortgage loans) are estimated based on changes in mortgage interest rates from the date of the loan commitment. The fair value of foreign currency derivatives is computed based on changes in foreign currency rates stated in the contract compared to those prevailing at the measurement date. Commodity derivative fair values are computed based on changes in the price per unit stated in the contract compared to those prevailing at the measurement date.

The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2024, December 31, 2023 and March 31, 2023:

	Derivative Assets						Derivative Liabilities
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Derivatives designated as hedging instruments under ASC 815:
Interest rate derivatives designated as Cash Flow Hedges	$	12,985	$	40,116	$	25,730	$	94,758	$	44,456	$	43,412
Interest rate derivatives designated as Fair Value Hedges	13,443		12,349		13,732		21		273		—
Total derivatives designated as hedging instruments under ASC 815	$	26,428	$	52,465	$	39,462	$	94,779	$	44,729	$	43,412
Derivatives not designated as hedging instruments under ASC 815:
Interest rate derivatives	$	222,505	$	211,490	$	219,869	$	223,384	$	210,397	$	219,053
Interest rate lock commitments	6,212		4,511		5,356		21		—		67
Forward commitments to sell mortgage loans	169		—		121		2,549		5,212		2,953
Commodity forward contracts	685		888		491		416		609		315
Foreign exchange contracts	3,265		6,372		8,705		3,215		6,308		8,632
Total derivatives not designated as hedging instruments under ASC 815	$	232,836	$	223,261	$	234,542	$	229,585	$	222,526	$	231,020
Total Derivatives	$	259,264	$	275,726	$	274,004	$	324,364	$	267,255	$	274,432

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to net interest income and to manage its exposure to interest rate movements. To accomplish these objectives, the Company primarily uses interest rate swaps and interest rate collars as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts to or from a counterparty in exchange for the Company receiving or paying fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate collars designated as cash flow hedges involve the settlement of amounts in which the interest rate index specified in the contract

exceeds the agreed upon cap strike rate or in which the interest rate index specified in the contract is below the agreed upon floor strike rate at the end of each period.

As of March 31, 2024, the Company had various interest rate collar and swap derivatives designated as cash flow hedges of variable rate loans. 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 or loss and are subsequently reclassified to interest income as interest payments are made on such variable rate loans. The changes in fair value (net of tax) are separately disclosed in the Consolidated Statements of Comprehensive Income.

The table below provides details on these cash flow hedges, summarized by derivative type and maturity, as of March 31, 2024:

	March 31, 2024
	Notional		Fair Value
(In thousands)	Amount		Asset (Liability)
Interest Rate Collars at 1-month CME term SOFR:
Buy 2.250% floor, sell 3.743% cap; matures September 2025	$	1,250,000	$	(18,054)
Buy 2.750% floor, sell 4.320% cap; matures October 2026	500,000		(4,246)
Buy 2.000% floor, sell 3.450% cap; matures September 2027	1,250,000		(36,414)
Interest Rate Swaps at 1-month CME term SOFR:
Fixed 3.748%; matures December 2025	250,000		(3,420)
Fixed 3.759%; matures December 2025	250,000		(3,373)
Fixed 3.680%; matures February 2026	250,000		(3,715)
Fixed 4.176%; matures March 2026	250,000		(1,439)
Fixed 3.915%; matures March 2026	250,000		(2,643)
Fixed 4.450%; matures July 2026	250,000		410
Fixed 3.515%, matures December 2026	250,000		(4,681)
Fixed 3.512%; matures December 2026	250,000		(4,700)
Fixed 3.453%; matures February 2027	250,000		(5,086)
Fixed 4.150%; matures July 2027	250,000		199
Fixed 3.748%; matures March 2028	250,000		(2,483)
Fixed 3.526%; matures March 2028	250,000		(4,504)
Fixed 3.993%; matures October 2029	100,000		1,150
Fixed 3.993%; matures October 2029	250,000		2,876
Fixed 4.245%; matures November 2029	175,000		4,175
Fixed 4.245%; matures November 2029	175,000		4,175
Total Cash Flow Hedges	$	6,700,000	$	(81,773)

In the first quarter of 2022, the Company terminated interest rate swap derivative contracts designated as cash flow hedges of variable rate deposits with a total notional value of $1.0 billion and a five-year term effective July 2022. At the time of termination, the fair value of the derivative contracts totaled an asset of $66.5 million, with such adjustments to fair value recorded in accumulated other comprehensive income or loss. In the second quarter of 2022, the Company terminated two additional interest rate swap derivative contracts designated as cash flow hedges of variable rate deposits with a total notional value of $500.0 million each effective since April 2020. The remaining terms of such derivative contracts were through March 2023 and April 2024 and, at the time of termination, the fair value of the derivative contracts totaled assets of $3.7 million and $10.7 million, respectively, with such adjustments to fair value recorded in accumulated other comprehensive income or loss. In the fourth quarter of 2022, the Company terminated one additional interest rate collar derivative contract designated as a cash flow hedge of a term borrowing facility with a total notional value of $64.3 million effective since September 2018. The remaining term of such derivative contract was through September 2023 and, at the time of termination, the fair value of the derivative contract totaled an asset of $875,000, with such adjustments to fair value recorded in accumulated other comprehensive income or loss.

For all such terminations, as the hedged forecasted transactions (interest payments on variable rate deposits and a term borrowing facility) are still expected to occur over the remaining term of such terminated derivatives, such adjustments will remain in accumulated other comprehensive income or loss and be reclassified as a reduction to interest expense on a straight-line basis over the original term of the terminated derivative contracts.

A rollforward of the amounts in accumulated other comprehensive income or loss related to interest rate derivatives designated as cash flow hedges, including such derivative contracts terminated during the period, follows:

	Three Months Ended
(In thousands)	March 31, 2024		March 31, 2023
Unrealized gain at beginning of period	$	43,538	$	10,026
Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings	19,818		3,747
Amount of loss recognized in other comprehensive income or loss	(101,909)		30,919
Unrealized (loss) gain at end of period	$	(38,553)	$	44,692

As of March 31, 2024, the Company estimated that during the next 12 months $56.9 million will be reclassified from accumulated other comprehensive income or loss as a decrease to net interest income. Such estimate consists of $13.3 million reclassified as a reduction to interest expense on the terminated cash flow hedges discussed above and $70.2 million reclassified as a reduction to interest income related to the interest rate collars and swaps noted above that remain outstanding.

Fair Value Hedges of Interest Rate Risk

Interest rate swaps designated as fair value hedges involve the payment of fixed amounts to a counterparty in exchange for the Company receiving variable payments over the life of the agreements without the exchange of the underlying notional amount. As of March 31, 2024, the Company had 13 interest rate swaps with an aggregate notional amount of $215.2 million that were designated as fair value hedges primarily associated with fixed rate commercial and industrial and commercial real estate loans as well as life insurance premium finance receivables.

For derivatives designated and that qualify as fair value hedges, the net gain or loss from the entire change in the fair value of the derivative instrument is recognized in the same income statement line item as the earnings effect, including the net gain or loss, of the hedged item (interest income earned on fixed rate loans) when the hedged item affects earnings.

The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of March 31, 2024:

(In thousands)		March 31, 2024
Derivatives in Fair Value Hedging Relationships	Location in the Statement of Condition	Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued
Interest rate swaps	Loans, net of unearned income	$	201,019	$	(13,487)	$	(75)
	Available-for-sale debt securities	712		(19)		—

The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective period:

(In thousands) Derivatives in Fair Value Hedging Relationships	Location of (Loss)/Gain Recognized in Income on Derivative	Three Months Ended
		March 31, 2024
Interest rate swaps	Interest and fees on loans	$	10
	Interest income - investment securities	—

Non-Designated Hedges

The Company does not use derivatives for speculative purposes. Derivatives not designated as accounting hedges are used to manage the Company’s economic exposure to interest rate movements and other identified risks but do not meet the strict

hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings.

Interest Rate Derivatives—Periodically, the Company may purchase interest rate cap derivatives designed to act as an economic hedge of the risk of the negative impact on its fixed-rate loan portfolios from rising interest rates. As of March 31, 2024, there were no interest rate caps outstanding that were designed to act as an economic hedge.

Additionally, the Company has interest rate derivatives, including swaps and option products, resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products (typically interest rate swaps) directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively convert a variable rate loan to a fixed rate. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At March 31, 2024 and December 31, 2023, the Company had interest rate derivative transactions with an aggregate notional amount of approximately $11.6 billion and $11.4 billion, respectively, (all interest rate swaps and caps with customers and third parties) related to this program. At March 31, 2024 these interest rate derivatives had maturity dates ranging from April 2024 to January 2037.

Mortgage Banking Derivatives—These derivatives include interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market and forward commitments for the future delivery of such loans. It is the Company’s practice to enter into forward commitments for the future delivery of a portion of its residential mortgage loan production when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held-for-sale. The Company’s mortgage banking derivatives have not been designated as being in hedge relationships. At March 31, 2024 and December 31, 2023, the Company had interest rate lock commitments with an aggregate notional amount of approximately $226.4 million and $129.9 million, and forward commitments to sell mortgage loans with an aggregate notional amount of approximately $561.6 million and $626.9 million, respectively. The fair values of these derivatives were estimated based on changes in mortgage rates from the dates of the commitments. Changes in the fair value of these mortgage banking derivatives are included in mortgage banking revenue.

Commodity Derivatives—The Company has commodity forward contracts resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively purchase or sell a given commodity at an agreed-upon price on an agreed-upon settlement date. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At March 31, 2024 and December 31, 2023, the Company had commodity derivative transactions with an aggregate notional amount of approximately $8.7 million and $8.4 million, respectively, (all forward contracts with customers and third parties) related to this program. At March 31, 2024, these commodity derivatives had maturity dates ranging from April 2024 to March 2025.

Foreign Currency Derivatives—The Company has foreign currency derivative contracts resulting from a service the Company provides to certain qualified customers. The Company’s banking subsidiaries execute certain derivative products directly with qualified customers to facilitate their respective risk management strategies related to foreign currency fluctuations. For example, these arrangements allow the Company’s customers to effectively exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. As of March 31, 2024 and December 31, 2023, the Company held foreign currency derivatives with an aggregate notional amount of approximately $107.1 million and $144.3 million, respectively.

Other Derivatives—Periodically, the Company will sell options to a bank or dealer for the right to purchase certain securities held within the banks’ investment portfolios (covered call options). These option transactions are designed to increase the total return associated with the investment securities portfolio. These options do not qualify as accounting hedges pursuant to ASC 815 and, accordingly, changes in the fair value of these contracts are recognized as other non-interest income. There were no covered call options outstanding as of March 31, 2024, December 31, 2023 or March 31, 2023.

Periodically, the Company will purchase options for the right to purchase securities not currently held within the banks’ investment portfolios or enter into interest rate swaps in which the Company elects to not designate such derivatives as hedging instruments. These option and swap transactions are designed primarily to economically hedge a portion of the fair value adjustments related to the Company's mortgage servicing rights portfolio. The gain or loss associated with these derivative contracts are included in mortgage banking revenue. The Company held five interest rate derivatives with an aggregate notional value of $145.0 million at March 31, 2024 and four interest rate derivatives with an aggregate notional value of and $195.0 million at December 31, 2023, for such purpose of economically hedging a portion of the fair value adjustment related to its mortgage servicing rights portfolio.

Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows:

(In thousands)		Three Months Ended
Derivative	Location in income statement	March 31, 2024		March 31, 2023
Interest rate swaps and caps	Trading gains, net	$	595	$	800
Mortgage banking derivatives	Mortgage banking revenue	(15)		3,640
Commodity contracts	Trading gains, net	268		177
Foreign exchange contracts	Trading gains, net	8		—
Covered call options	Fees from covered call options	4,847		10,391
Derivative contract held as economic hedge on MSRs	Mortgage banking revenue	(2,577)		946

Credit Risk

Derivative instruments have inherent risks, primarily market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the risk that the counterparty will fail to perform according to the terms of the agreement. The amounts potentially subject to market and credit risks are the streams of interest payments under the contracts and the market value of the derivative instrument and not the notional principal amounts used to express the volume of the transactions. Market and credit risks are managed and monitored as part of the Company’s overall asset-liability management process, except that the credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company’s standard loan underwriting process since these derivatives are secured through collateral provided by the loan agreements. Actual exposures are monitored against various types of credit limits established to contain risk within parameters. When deemed necessary, appropriate types and amounts of collateral are obtained to minimize credit exposure.

The Company has agreements with certain of its interest rate derivative counterparties that contain cross-default provisions, which provide that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision allowing the counterparty to terminate the derivative positions if the Company fails to maintain its status as a well or adequately capitalized institution, which would require the Company to settle its obligations under the agreements. As of March 31, 2024, there were no interest rate derivatives in a net liability position that were subject to such agreements. The fair value of such derivatives includes accrued interest related to these agreements. If the Company had breached any of these provisions and those derivatives subject to such agreements were in a liability position, and the derivatives were terminated as a result, the Company would have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

The Company is also exposed to the credit risk of its commercial borrowers who are counterparties to interest rate derivatives with the banks. This counterparty risk related to the commercial borrowers is managed and monitored through the banks’ standard underwriting process applicable to loans since these derivatives are secured through collateral provided by the loan agreement. The counterparty risk associated with the mirror-image swaps executed with third parties is monitored and managed in connection with the Company’s overall asset liability management process.

The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative assets and liabilities on the Consolidated Statements of Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets						Derivative Liabilities
	Fair Value						Fair Value
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Gross Amounts Recognized	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Less: Amounts offset in the Statements of Condition	—		—		—		—		—		—
Net amount presented in the Statements of Condition	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Gross amounts not offset in the Statements of Condition
Offsetting Derivative Positions	(109,977)		(76,514)		(55,838)		(109,977)		(76,514)		(55,838)
Collateral Posted	(119,572)		(144,899)		(181,884)		—		—		—
Net Credit Exposure	$	19,384	$	42,542	$	21,609	$	208,186	$	178,612	$	206,627

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Fair Values of Assets and Liabilities

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Values of Assets and Liabilities

Fair Values of Assets and Liabilities

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the inputs used to determine fair value. These levels are:

•Level 1—unadjusted quoted prices in active markets for identical assets or liabilities.

•Level 2—inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•Level 3—significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

A financial instrument’s categorization within the above valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the assets or liabilities. The following is a description of the valuation methodologies used for the Company’s assets and liabilities measured at fair value on a recurring basis.

Available-for-sale debt securities, trading account securities and equity securities with readily determinable fair value—Fair values for available-for-sale debt securities, trading account securities and equity securities with readily determinable fair value are typically based on prices obtained from independent pricing vendors. Securities measured with these valuation techniques are generally classified as Level 2 of the fair value hierarchy. Typically, standard inputs such as benchmark yields, reported trades for similar securities, issuer spreads, benchmark securities, bids, offers and reference data including market research publications are used to determine the fair value of these securities. When these inputs are not available, broker/dealer quotes may be obtained by the vendor to determine the fair value of the security. We review the vendor’s pricing methodologies to determine if observable market information is being used, versus unobservable inputs. Fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy. The fair value of U.S. Treasury securities and certain equity securities with readily determinable fair value are based on unadjusted quoted prices in active markets for identical securities. As such, these securities are classified as Level 1 in the fair value hierarchy.

The Company’s Investment Operations Department is responsible for the valuation of Level 3 available-for-sale debt securities. The methodology and variables used as inputs in pricing Level 3 securities are derived from a combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments.

At March 31, 2024, the Company classified $88.2 million of municipal securities as Level 3. These municipal securities are bond issues for various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and are privately placed, non-rated bonds without CUSIP numbers. The Company’s methodology for pricing these securities focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated investment debt security, the Investment Operations Department references a rated, publicly issued bond by the same issuer if available. A reduction is then applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one complete rating grade (i.e. a “AA” rating for a comparable bond would be reduced to “A” for the Company’s valuation). For bond issues without comparable bond proxies, a rating of “BBB” was assigned. In the first quarter of 2024, all of the ratings derived by the Investment Operations Department using the above process were “BBB” or better. The fair value measurement noted above is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined in the above process, Investment Operations obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Certain municipal bonds held by the Company at March 31, 2024 are continuously callable. When valuing these bonds, the fair value is capped at par value as the Company assumes a market participant would not pay more than par for a continuously callable bond.

Mortgage loans held-for-sale—The fair value of mortgage loans held-for-sale is typically determined by reference to investor price sheets for loan products with similar characteristics. Loans measured with this valuation technique are classified as Level 2 in the fair value hierarchy.

At March 31, 2024, the Company classified $33.7 million of certain delinquent mortgage loans held-for-sale as Level 3. For such delinquent loans in which investor interest may be limited, the Company estimates fair value by discounting future scheduled cash flows for the specific loan through its life, adjusted for estimated credit losses. The Company uses a discount rate based on prevailing market coupon rates on loans with similar characteristics. The assumed weighted average discount rate used as an input to value these loans at March 31, 2024 was 6.60%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. Additionally, the weighted average credit discount used as an input to value the specific loans was 0.43% with credit loss discount ranging from 0%-12% at March 31, 2024.

Loans held-for-investment—The fair value for certain loans in which the Company previously elected the fair value option is estimated by discounting future scheduled cash flows for the specific loan through maturity, adjusted for estimated credit losses and prepayment or life assumptions. These loans primarily consist of early buyout loans guaranteed by U.S. government agencies that are delinquent and, as a result, investor interest may be limited. The Company uses a discount rate based on the actual coupon rate of the underlying loan. At March 31, 2024, the Company classified $49.3 million of loans held-for-investment carried at fair value as Level 3. The assumed weighted average discount rate used as an input to value these loans at March 31, 2024 was 6.60%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. As noted above, the fair value estimate also includes assumptions of prepayment speeds and average life as well as credit losses. The weighted average prepayments speed used as an input to value current loans was 7.78% at March 31, 2024. Prepayment speeds are inversely related to the fair value of these loans as an increase in prepayment speeds results in a decreased valuation. For delinquent loans in which performance is not assumed and there is a higher probability of resolution of the loan ending in foreclosure, the weighted average life of such loans was 5.9 years. Average life is inversely related to the fair value of these loans as an increase in estimated life results in a decreased valuation. Additionally, the weighted average credit discount used as an input to value the specific loans was 1.18% with credit loss discounts ranging from 0%-16% at March 31, 2024.

MSRs—Fair value for MSRs is determined utilizing a valuation model which calculates the fair value of each servicing right based on the present value of estimated future cash flows. The Company uses a discount rate commensurate with the risk associated with each servicing right, given current market conditions. At March 31, 2024, the Company classified $201.0 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at March 31, 2024 was 10.99% with discount rates applied ranging from 1%-21%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. The fair value of MSRs was also estimated based on other assumptions including prepayment speeds and the cost to service. Prepayment speeds ranged from 0%-90% or a weighted average prepayment speed of 7.78%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $77 and $394, respectively, per loan. Prepayment speeds and the cost to service are both inversely related to the fair value of MSRs as an increase in prepayment speeds or the cost to service results in a decreased valuation. See Note (9) “Mortgage Servicing Rights (“MSRs”)” in Item 1 of this report for further discussion of MSRs.

Derivative instruments—The Company’s derivative instruments include interest rate swaps, caps and collars, commitments to fund mortgages for sale into the secondary market (interest rate locks), forward commitments to end investors for the sale of mortgage loans, commodity future contracts and foreign currency contracts. Interest rate swaps, caps and collars and commodity future contracts are valued by a third party, using models that primarily use market observable inputs, such as yield curves and commodity prices prevailing at the measurement date, and are classified as Level 2 in the fair value hierarchy. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. The fair value for mortgage-related derivatives is based on changes in mortgage rates from the date of the commitments. The fair value of foreign currency derivatives is computed based on change in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

At March 31, 2024, the Company classified $6.2 million of derivative assets related to interest rate locks as Level 3. The fair value of interest rate locks is based on prices obtained for loans with similar characteristics from third parties, adjusted for the pull-through rate, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund. The weighted-average pull-through rate at March 31, 2024 was 82.11% with pull-through rates applied ranging from 6% to 100%. Pull-through rates are directly related to the fair value of interest rate locks as an increase in the pull-through rate results in an increased valuation.

Nonqualified deferred compensation assets—The underlying assets relating to the nonqualified deferred compensation plan are included in a trust and primarily consist of non-exchange traded institutional funds which are priced based by an independent third party service. These assets are classified as Level 2 in the fair value hierarchy.

The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented:

	March 31, 2024
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	61,175	$	61,175	$	—	$	—
U.S. government agencies	45,715		—		45,715		—
Municipal	140,590		—		52,371		88,219
Corporate notes	76,725		—		76,725		—
Mortgage-backed	4,063,393		—		4,063,393		—
Trading account securities	2,184		—		2,184		—
Equity securities with readily determinable fair value	119,777		111,711		8,066		—
Mortgage loans held-for-sale	339,884		—		306,158		33,726
Loans held-for-investment	144,371		—		95,054		49,317
MSRs	201,044		—		—		201,044
Nonqualified deferred compensation assets	15,953		—		15,953		—
Derivative assets	259,264		—		253,052		6,212
Total	$	5,470,075	$	172,886	$	4,918,671	$	378,518
Derivative liabilities	$	324,364	$	—	$	324,364	$	—

	December 31, 2023
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	6,968	$	6,968	$	—	$	—
U.S. government agencies	45,124		—		45,124		—
Municipal	140,958		—		54,721		86,237
Corporate notes	76,531		—		76,531		—
Mortgage-backed	3,233,334		—		3,233,334		—
Trading account securities	4,707		—		4,707		—
Equity securities with readily determinable fair value	139,268		131,202		8,066		—
Mortgage loans held-for-sale	292,722		—		265,887		26,835
Loans held-for-investment	155,261		—		94,591		60,670
MSRs	192,456		—		—		192,456
Nonqualified deferred compensation assets	15,238		—		15,238		—
Derivative assets	275,726		—		271,216		4,510
Total	$	4,578,293	$	138,170	$	4,069,415	$	370,708
Derivative liabilities	$	267,255	$	—	$	267,255	$	—

	March 31, 2023
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	4,948	$	4,948	$	—	$	—
U.S. government agencies	74,862		—		74,862		—
Municipal	160,386		—		48,129		112,257
Corporate notes	83,675		—		83,675		—
Mortgage-backed	2,935,974		—		2,935,974		—
Trading account securities	102		—		102		—
Equity securities with readily determinable fair value	111,943		103,877		8,066		—
Mortgage loans held-for-sale	302,493		—		258,243		44,250
Loans held-for-investment	202,143		—		132,650		69,493
MSRs	224,470		—		—		224,470
Nonqualified deferred compensation assets	14,379		—		14,379		—
Derivative assets	274,004		—		268,648		5,356
Total	$	4,389,379	$	108,825	$	3,824,728	$	455,826
Derivative liabilities	$	274,432	$	—	$	274,432	$	—

The aggregate remaining contractual principal balance outstanding as of March 31, 2024, December 31, 2023 and March 31, 2023 for mortgage loans held-for-sale measured at fair value under ASC 825 was $342.7 million, $291.7 million and $307.3 million, respectively, while the aggregate fair value of mortgage loans held-for-sale was $339.9 million, $292.7 million and $302.5 million, for the same respective periods, as shown in the above tables. At March 31, 2024, $1.3 million of mortgage loans held-for-sale were classified as nonaccrual compared to $649,000 as of December 31, 2023 and $3.3 million as of March 31, 2023. Additionally, there were $33.2 million of loans past due greater than 90 days and still accruing in the mortgage loans held-for-sale portfolio as of March 31, 2024 compared to $26.6 million as of December 31, 2023 and $41.4 million as of March 31, 2023. All of the nonaccrual loans and loans past due greater than 90 days and still accruing within the mortgage loans held-for-sale portfolio at March 31, 2024, December 31, 2023, and March 31, 2023 were individual delinquent mortgage loans bought back from GNMA at the unconditional option of the Company as servicer for those loans.

The aggregate remaining contractual principal balance outstanding as of March 31, 2024, December 31, 2023 and March 31, 2023 for loans held-for-investment measured at fair value under ASC 825 was $145.9 million, $156.9 million and $204.5 million, respectively, while the aggregate fair value of loans held-for-investment was $144.4 million, $155.3 million and $202.1 million, respectively, as shown in the above tables.

The changes in Level 3 assets measured at fair value on a recurring basis during the three months ended March 31, 2024 and 2023 are summarized as follows:

			Mortgage loans held-for-sale		Loans held-for- investment		Mortgage servicing rights		Derivative assets
(In thousands)	Municipal
Balance at January 1, 2024	$	86,237	$	26,835	$	60,670	$	192,456	$	4,510
Total net (losses) gains included in:
Net income (1)	—		67		(317)		8,588		1,702
Other comprehensive income or loss	(1,988)		—		—		—		—
Purchases	8,384		—		—		—		—
Settlements	(4,414)		(10,340)		(15,803)		—		—
Net transfers into Level 3	—		17,164		4,767		—		—
Balance at March 31, 2024	$	88,219	$	33,726	$	49,317	$	201,044	$	6,212

			Mortgage loans held-for-sale		Loans held-for- investment		Mortgage servicing rights		Derivative assets
(In thousands)	Municipal
Balance at January 1, 2023	$	117,537	$	48,655	$	84,165	$	230,225	$	1,711
Total net (losses) gains included in:
Net income (1)	—		466		364		(5,755)		3,645
Other comprehensive income or loss	(1,662)		—		—		—		—
Purchases	4,418		—		—		—		—
Settlements	(8,036)		(18,619)		(20,322)		—		—
Net transfers into Level 3	—		13,748		5,286		—		—
Balance at March 31, 2023	$	112,257	$	44,250	$	69,493	$	224,470	$	5,356

(1)Changes in the balance of mortgage loans held-for-sale, MSRs, and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

Also, the Company may be required, from time to time, to measure certain other assets at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from impairment charges on individual assets. For assets measured at fair value on a non-recurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at March 31, 2024:

	March 31, 2024								Three Months Ended March 31, 2024 Fair Value Losses Recognized, net
(In thousands)	Total		Level 1		Level 2		Level 3
Individually assessed loans - foreclosure probable and collateral-dependent	$	89,368	$	—	$	—	$	89,368	$	16,726
Other real estate owned (1)	14,538		—		—		14,538		207
Total	$	103,906	$	—	$	—	$	103,906	$	16,933

(1)Net fair value losses recognized on other real estate owned include valuation adjustments and charge-offs during the respective period.

Individually assessed loans—In accordance with ASC 326, the allowance for credit losses for loans and other financial assets held at amortized cost should be measured on a collective or pooled basis when such assets exhibit similar risk characteristics. In instances in which a financial asset does not exhibit similar risk characteristics to a pool, the Company is required to measure such allowance for credit losses on an individual asset basis. For the Company’s loan portfolio, nonaccrual loans are considered to not exhibit similar risk characteristics as pools and thus are individually assessed. Credit losses are measured by estimating the fair value of the loan based on the present value of expected cash flows, the market price of the loan, or the fair value of the underlying collateral. Individually assessed loans are considered a fair value measurement where an allowance for credit loss is established based on the fair value of collateral. Appraised values on relevant real estate properties, which may require adjustments to market-based valuation inputs, are generally used on foreclosure probable and collateral-dependent loans within the real estate portfolios.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs of individually assessed loans. For more information on individually assessed loans refer to Note (7) “Allowance for Credit Losses” in Item 1 of this report. At March 31, 2024, the Company had $89.4 million of individually assessed loans classified as Level 3. All of the $89.4 million of individually assessed loans were measured at fair value based on the underlying collateral of the loan as shown in the table above. None were valued based on discounted cash flows in accordance with ASC 310.

Other real estate owned —Other real estate owned is comprised of real estate acquired in partial or full satisfaction of loans and is included in other assets. Other real estate owned is recorded at its estimated fair value less estimated selling costs at the date of transfer, with any excess of the related loan balance over the fair value less expected selling costs charged to the allowance for loan losses. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in other non-interest expense. Gains and losses upon sale, if any, are also charged to other non-interest expense. Fair value is generally based on third party appraisals and internal estimates that are adjusted by a discount representing the estimated cost of sale and is therefore considered a Level 3 valuation.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs for other real estate owned. At March 31, 2024, the Company had $14.5 million of other real estate owned classified as Level 3. The unobservable input applied to other real estate owned relates to the 10% reduction to the appraisal value representing the estimated cost of sale of the foreclosed property. A higher discount for the estimated cost of sale results in a decreased carrying value.

The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at March 31, 2024 were as follows:

(Dollars in thousands)	Fair Value		Valuation Methodology	Significant Unobservable Input	Range of Inputs	Weighted Average of Inputs			Impact to valuation from an increased or higher input value
Measured at fair value on a recurring basis:
Municipal securities	$	88,219	Bond pricing	Equivalent rating	BBB-AA+	N/A			Increase
Mortgage loans held-for-sale	33,726		Discounted cash flows	Discount rate	6.60%	6.60%			Decrease
				Credit discount	0% - 12%	0.43%			Decrease
Loans held-for-investment	49,317		Discounted cash flows	Discount rate	6.60% - 6.63%	6.60%			Decrease
				Credit discount	0% - 16%	1.18%			Decrease
				Constant prepayment rate (CPR) - current loans	7.78%	7.78%			Decrease
				Average life - delinquent loans (in years)	1.1 years - 10.6 years	5.9 years			Decrease
MSRs	201,044		Discounted cash flows	Discount rate	1% - 21%	10.99%			Decrease
				Constant prepayment rate (CPR)	0% - 90%	7.78%			Decrease
				Cost of servicing	$70 - $200	$	77		Decrease
				Cost of servicing - delinquent	$200 - 1,000	$	394		Decrease
Derivatives	6,212		Discounted cash flows	Pull-through rate	6% - 100%	82.11		%	Increase
Measured at fair value on a non-recurring basis:
Individually assessed loans - foreclosure probable and collateral-dependent	89,368		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%			Decrease
Other real estate owned	14,538		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%			Decrease

The Company is required under applicable accounting guidance to report the fair value of all financial instruments on the Consolidated Statements of Condition, including those financial instruments carried at cost. The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown:

	At March 31, 2024				At December 31, 2023				At March 31, 2023
	Carrying		Fair		Carrying		Fair		Carrying		Fair
(In thousands)	Value		Value		Value		Value		Value		Value
Financial Assets:
Cash and cash equivalents	$	379,886	$	379,886	$	423,464	$	423,464	$	445,986	$	445,986
Interest-bearing deposits with banks	2,131,077		2,131,077		2,084,323		2,084,323		1,563,578		1,563,578
Available-for-sale securities	4,387,598		4,387,598		3,502,915		3,502,915		3,259,845		3,259,845
Held-to-maturity securities	3,810,015		3,111,954		3,856,916		3,215,468		3,606,391		2,976,198
Trading account securities	2,184		2,184		4,707		4,707		102		102
Equity securities with readily determinable fair value	119,777		119,777		139,268		139,268		111,943		111,943
FHLB and FRB stock, at cost	224,657		224,657		205,003		205,003		244,957		244,957
Brokerage customer receivables	13,382		13,382		10,592		10,592		16,042		16,042
Mortgage loans held-for-sale, at fair value	339,884		339,884		292,722		292,722		302,493		302,493
Loans held-for-investment, at fair value	144,371		144,371		155,261		155,261		202,143		202,143
Loans held-for-investment, at amortized cost	43,086,335		42,068,619		41,976,570		41,090,010		39,363,328		38,577,761
Nonqualified deferred compensation assets	15,953		15,953		15,238		15,238		14,379		14,379
Derivative assets	259,264		259,264		275,726		275,726		274,004		274,004
Accrued interest receivable and other	487,933		487,933		477,832		477,832		417,066		417,066
Total financial assets	$	55,402,316	$	53,686,539	$	53,420,537	$	51,892,529	$	49,822,257	$	48,406,497
Financial Liabilities
Non-maturity deposits	$	38,554,438	$	38,554,438	$	38,772,098	$	38,772,098	$	37,366,959	$	37,366,959
Time certificates of deposit	7,894,420		7,872,870		6,625,072		6,603,746		5,351,252		4,970,556
FHLB advances	2,676,751		2,669,780		2,326,071		2,367,107		2,316,071		2,255,580
Other borrowings	575,408		573,752		645,813		643,755		583,548		555,615
Subordinated notes	437,965		413,003		437,866		413,501		437,493		410,827
Junior subordinated debentures	253,566		253,574		253,566		253,579		253,566		252,663
Derivative liabilities	324,364		324,364		267,255		267,255		274,432		274,432
Accrued interest payable	64,943		64,943		51,116		51,116		42,015		42,015
Total financial liabilities	$	50,781,855	$	50,726,724	$	49,378,857	$	49,372,157	$	46,625,336	$	46,128,647

Not all the financial instruments listed in the table above are subject to the disclosure provisions of ASC Topic 820, as certain assets and liabilities result in their carrying value approximating fair value. These include cash and cash equivalents, interest-bearing deposits with banks, brokerage customer receivables, FHLB and FRB stock, accrued interest receivable and accrued interest payable and non-maturity deposits.

The following methods and assumptions were used by the Company in estimating fair values of financial instruments that were not previously disclosed.

Held-to-maturity securities. Held-to-maturity securities include U.S. government-sponsored agency securities, municipal bonds issued by various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and mortgage-backed securities. Fair values for held-to-maturity securities are typically based on prices obtained from independent pricing vendors. In accordance with ASC 820, the Company has generally categorized these held-to-maturity securities as a Level 2 fair value measurement. Fair values for certain other held-to-maturity securities are based on the bond pricing methodology discussed previously related to certain available-for-sale securities. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 3 fair value measurement.

Loans held-for-investment, at amortized cost. Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are analyzed by type such as commercial, residential real estate, etc. Each category is further segmented by interest rate type (fixed and variable). The fair value for loans is estimated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect credit and interest rate risks inherent in the loan category. In accordance with ASC 820, the Company has categorized these loans as a Level 3 fair value measurement.

Time certificates of deposit. The fair value of time certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently in effect for time certificates of deposit. In accordance with ASC 820, the Company has categorized time certificates of deposit as a Level 3 fair value measurement.

FHLB advances. The fair value of FHLB advances is estimated by a discounted cash flow analysis based on current market rates of similar maturity debt securities to discount cash flows. In accordance with ASC 820, the Company has categorized FHLB advances as a Level 3 fair value measurement.

Subordinated notes. The fair value of the subordinated notes is based on a market price obtained from an independent pricing vendor. In accordance with ASC 820, the Company has categorized subordinated notes as a Level 2 fair value measurement.

Junior subordinated debentures. The fair value of the junior subordinated debentures is based on the discounted value of contractual cash flows. In accordance with ASC 820, the Company has categorized junior subordinated debentures as a Level 3 fair value measurement.

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Stock-Based Compensation Plans

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Stock-Based Compensation Plans

Stock-Based Compensation Plans

As of March 31, 2024, approximately 737,000 shares were available for future grants, assuming the maximum number of shares are issued for the performance awards outstanding, approved under the Company Stock Incentive Plans (“the Plans”). Descriptions of the Plans are included in Note (18) “Stock Compensation Plans and Other Employee Benefit Plans” of the 2023 Form 10-K.

Stock-based compensation expense recognized in the Consolidated Statements of Income was $9.2 million in the first quarter of 2024 and $8.3 million in the first quarter of 2023.

A summary of the Plans’ stock option activity for the three months ended March 31, 2024 and March 31, 2023 is presented below:

Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2024	13,100	$	42.76
Granted	—	—
Exercised	(775)	32.26
Forfeited or canceled	—	—
Outstanding at March 31, 2024	12,325	$	43.42	4.2	$	751
Exercisable at March 31, 2024	12,325	$	43.42	4.2	$	751

Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2023	68,093	$	41.14
Granted	—	—
Exercised	(54,218)	40.87
Forfeited or canceled	—	—
Outstanding at March 31, 2023	13,875	$	42.18	4.7	$	427
Exercisable at March 31, 2023	13,875	$	42.18	4.7	$	427

(1)Represents the remaining weighted average contractual life in years.

(2)Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company’s stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.

The aggregate intrinsic value of options exercised during the three months ended March 31, 2024 and March 31, 2023, was approximately $50,000 and $2.5 million, respectively. Cash received from option exercises under the Plans for the three months ended March 31, 2024 and March 31, 2023 was approximately $25,000 and $2.2 million, respectively.

A summary of the Plans’ restricted share activity for the three months ended March 31, 2024 and March 31, 2023 is presented below:

	Three months ended March 31, 2024			Three months ended March 31, 2023
Restricted Shares	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	746,123	$	79.60	610,155	$	73.21
Granted	305,807	98.92		242,576	89.82
Vested and issued	(219,622)	69.25		(96,649)	64.14
Forfeited or canceled	(3,154)	87.01		(1,968)	77.37
Outstanding at March 31	829,154	$	89.44	754,114	$	79.70
Vested, but deferred, at March 31	99,382	$	53.78	97,888	$	53.30

A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the three months ended March 31, 2024 and March 31, 2023 is presented below:

	Three months ended March 31, 2024			Three months ended March 31, 2023
Performance-based Stock	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	553,026	$	79.69	545,379	$	70.30
Granted	96,210	58.78		185,514	92.48
Added by performance factor at vesting	111,204	100.44		23,161	63.64
Vested and issued	(294,902)	58.69		(178,203)	63.64
Forfeited or canceled	(864)	95.40		(2,301)	78.20
Outstanding at March 31	464,674	$	93.62	573,550	$	79.24
Vested, but deferred, at March 31	21,493	$	43.71	35,852	$	44.59

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Accumulated Other Comprehensive Income or Loss and Earnings Per Share

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Accumulated Other Comprehensive Income or Loss and Earnings Per Share

Accumulated Other Comprehensive Income or Loss and Earnings Per Share

Accumulated Other Comprehensive Income or Loss

The following tables summarize the components of other comprehensive income or loss, including the related income tax effects, and the related amount reclassified to net income for the periods presented:

(In thousands)	Accumulated Unrealized (Losses) Gains on Securities		Accumulated Unrealized Gains (Losses) on Derivative Instruments		Accumulated Foreign Currency Translation Adjustments		Total Accumulated Other Comprehensive (Loss) Income
Balance at January 1, 2024	$	(350,697)	$	32,049	$	(42,583)	$	(361,231)
Other comprehensive loss during the period, net of tax, before reclassifications	(57,287)		(74,954)		(6,234)		(138,475)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	19		14,576		—		14,595
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(37)		—		—		(37)
Net other comprehensive (loss) during the period, net of tax	$	(57,305)	$	(60,378)	$	(6,234)	$	(123,917)
Balance at March 31, 2024	$	(408,002)	$	(28,329)	$	(48,817)	$	(485,148)

Balance at January 1, 2023	$	(386,057)	$	7,381	$	(48,960)	$	(427,636)
Other comprehensive income during the period, net of tax, before reclassifications	34,503		22,679		710		57,892
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(409)		2,749		—		2,340
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(32)		—		—		(32)
Net other comprehensive income during the period, net of tax	$	34,062	$	25,428	$	710	$	60,200
Balance at March 31, 2023	$	(351,995)	$	32,809	$	(48,250)	$	(367,436)

(In thousands)	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the
Details Regarding the Component of Accumulated Other Comprehensive Income (Loss)	Three Months Ended				Impacted Line on the Consolidated Statements of Income
	March 31,
	2024		2023
Accumulated unrealized gains on securities
Gains included in net income	$	(26)	$	560	Gains on investment securities, net
	(26)		560		Income before taxes
Tax effect	7		(151)		Income tax expense
Net of tax	$	(19)	$	409	Net income
Accumulated unrealized gains on derivative instruments
Amount reclassified to interest income on loans	$	24,475	$	9,072	Interest on Loans
Amount reclassified to interest expense on deposits	$	(4,657)	$	(5,588)	Interest on deposits
Amount reclassified to interest expense on other borrowings	—		263		Interest on other borrowings
	(19,818)		(3,747)		Income before taxes
Tax effect	5,242		998		Income tax expense
Net of tax	$	(14,576)	$	(2,749)	Net income

Earnings per Share

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended
(Dollars in thousands, except per share data)		March 31, 2024		March 31, 2023
Net income		$	187,294	$	180,198
Less: Preferred stock dividends		6,991		6,991
Net income applicable to common shares	(A)	$	180,303	$	173,207
Weighted average common shares outstanding	(B)	61,481		60,950
Effect of dilutive potential common shares
Common stock equivalents		928		873
Weighted average common shares and effect of dilutive potential common shares	(C)	62,409		61,823
Net income per common share:
Basic	(A/B)	$	2.93	$	2.84
Diluted	(A/C)	$	2.89	$	2.80

Potentially dilutive common shares can result from stock options, restricted stock unit awards and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect of inclusion would either reduce the loss per share or increase the income per share.

At the January 2024 meeting of the board of directors of the Company (the “Board of Directors”), a quarterly cash dividend of $0.45 per share ($1.80 on an annualized basis) was declared. It was paid on February 22, 2024 to shareholders of record as of February 8, 2024.

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 187,294	$ 180,198

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Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

The interim consolidated financial statements of Wintrust Financial Corporation and its subsidiaries (collectively, “Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management, reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the interim consolidated financial statements.

The accompanying interim consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles (“GAAP”). The interim unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (“2023 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation.

The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable; however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for credit losses, including the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity securities losses, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company’s significant accounting policies are included in Note (1) “Summary of Significant Accounting Policies” of the 2023 Form 10-K. In preparation of these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users or filed with the SEC.

Cash and Cash Equivalents

For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

Recent Accounting Developments

Equity Method and Joint Ventures - Investments in Tax Credit Structures

In March 2023, the FASB issued ASU No. 2023-02, “Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method,” which allows reporting entities the option to apply the proportional amortization method to other tax credit programs besides the Low-Income Housing Tax Credit structures. The guidance requires application of the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing the method at the reporting level entity level. The Company adopted ASU No. 2023-02 as of January 1, 2024. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements.

Segment Reporting

In November 2023, the FASB issued ASU No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” to enhance public entity disclosures regarding significant segment expenses which are regularly reported to an entity’s chief operating decision-maker (“CODM”) and included in a segment’s reported profit or loss. This ASU requires disclosure of the amount and composition of “other segment items,” the title and position of the CODM, and how the CODM uses reported measures of profit or loss to assess segment performance. Further, the guidance requires certain segment disclosures previously provided only annually, on an interim basis. This guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The guidance is to be applied retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this guidance on the consolidated financial statements.

Income Tax Disclosures

In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” to enhance the transparency and decision usefulness of income tax disclosures. This ASU requires annually that all entities disclose increasingly disaggregated information on amount of income taxes paid. Further, this ASU requires annually that all public entities must disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a specific quantitative threshold. This guidance is effective for fiscal years beginning after December 15, 2024, and is to be applied either on a prospective basis or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

Compensation – Scope Application of Profits Interest and Similar Awards

In March 2024, the FASB issued ASU No. 2024-01, “Compensation – Stock Compensation (Topic 718): Scope Application of Profits Interest and Similar Awards” which clarifies the guidance by providing an illustrative example to demonstrate how an entity should apply the scope guidance in Topic 718 when determining whether profits interest and similar awards should be accounted for in accordance with Topic 718. For public business entities, this guidance is effective for fiscal years beginning after December 15, 2024, including interim periods therein, and is to be applied either on a prospective basis or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

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Investment Securities (Tables)

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of Investment Securities

The following tables are a summary of the investment securities portfolios as of the dates shown:

	March 31, 2024
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities
U.S. Treasury	$	61,185	$	—	$	(10)	$	61,175
U.S. government agencies	50,000		—		(4,285)		45,715
Municipal	144,752		569		(4,731)		140,590
Corporate notes:
Financial issuers	83,996		—		(8,264)		75,732
Other	1,000		—		(7)		993
Mortgage-backed: (1)
Residential mortgage-backed securities	4,396,962		480		(520,719)		3,876,723
Commercial (multi-family) mortgage-backed securities	16,225		28		(577)		15,676
Collateralized mortgage obligations	188,240		924		(18,170)		170,994
Total available-for-sale securities	$	4,942,360	$	2,001	$	(556,763)	$	4,387,598
Held-to-maturity securities
U.S. government agencies	$	336,463	$	—	$	(69,998)	$	266,465
Municipal	168,490		258		(4,709)		164,039
Mortgage-backed: (1)
Residential mortgage-backed securities	3,007,304		—		(597,758)		2,409,546
Commercial (multi-family) mortgage-backed securities	6,401		—		(281)		6,120
Collateralized mortgage obligations	234,314		431		(22,983)		211,762
Corporate notes	57,372		8		(3,358)		54,022
Total held-to-maturity securities	$	3,810,344	$	697	$	(699,087)	$	3,111,954
Less: Allowance for credit losses	(329)
Held-to-maturity securities, net of allowance for credit losses	$	3,810,015
Equity securities with readily determinable fair value	$	123,421	$	4,480	$	(8,124)	$	119,777

(1)None of our mortgage-backed securities are subprime.

	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(In thousands)
Available-for-sale securities
U.S. Treasury	$	6,960	$	8	$	—	$	6,968
U.S. government agencies	50,000		—		(4,876)		45,124
Municipal	144,299		657		(3,998)		140,958
Corporate notes:
Financial issuers	83,996		—		(8,456)		75,540
Other	1,000		—		(9)		991
Mortgage-backed: (1)
Residential Mortgage-backed securities	3,505,012		1,392		(446,784)		3,059,620
Commercial (multi-family) mortgage-backed securities	13,201		68		(289)		12,980
Collateralized mortgage obligations	175,346		1,400		(16,012)		160,734
Total available-for-sale securities	$	3,979,814	$	3,525	$	(480,424)	$	3,502,915
Held-to-maturity securities
U.S. government agencies	$	336,468	$	—	$	(67,058)	$	269,410
Municipal	172,933		565		(3,778)		169,720
Mortgage-backed: (1)
Residential Mortgage-backed securities	3,042,828		1,922		(549,265)		2,495,485
Commercial (multi-family) mortgage-backed securities	6,415		—		(184)		6,231
Collateralized mortgage obligations	241,075		978		(21,502)		220,551
Corporate notes	57,544		7		(3,480)		54,071
Total held-to-maturity securities	$	3,857,263	$	3,472	$	(645,267)	$	3,215,468
Less: Allowance for credit losses	(347)
Held-to-maturity securities, net of allowance for credit losses	$	3,856,916
Equity securities with readily determinable fair value	$	143,312	$	3,500	$	(7,544)	$	139,268

(1)None of our mortgage-backed securities are subprime.

	March 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(In thousands)
Available-for-sale securities
U.S. Treasury	$	4,947	$	1	$	—	$	4,948
U.S. government agencies	80,000		—		(5,138)		74,862
Municipal	164,110		439		(4,163)		160,386
Corporate notes:
Financial issuers	93,995		—		(11,320)		82,675
Other	1,000		—		—		1,000
Mortgage-backed: (1)
Mortgage-backed securities	3,300,048		1,787		(445,405)		2,856,430
Collateralized mortgage obligations	95,880		—		(16,336)		79,544
Total available-for-sale securities	$	3,739,980	$	2,227	$	(482,362)	$	3,259,845
Held-to-maturity securities
U.S. government agencies	$	339,608	$	24	$	(70,064)	$	269,568
Municipal	174,720		1,117		(2,880)		172,957
Mortgage-backed: (1)
Mortgage-backed securities	2,872,591		1,197		(533,415)		2,340,373
Collateralized mortgage obligations	161,874		—		(22,431)		139,443
Corporate notes	58,061		14		(4,218)		53,857
Total held-to-maturity securities	$	3,606,854	$	2,352	$	(633,008)	$	2,976,198
Less: Allowance for credit losses	(463)
Held-to-maturity securities, net of allowance for credit losses	$	3,606,391
Equity securities with readily determinable fair value	$	116,296	$	3,065	$	(7,418)	$	111,943

(1)Consisting entirely of residential mortgage-backed securities, none of which are subprime.

Schedule of Available-for-sale Investment Securities Portfolios

The following table presents the portion of the Company’s available-for-sale investment securities portfolios that have gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at March 31, 2024:

	Continuous unrealized losses existing for less than 12 months				Continuous unrealized losses existing for greater than 12 months				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Available-for-sale securities
U.S. Treasury	$	61,175	$	(10)	$	—	$	—	$	61,175	$	(10)
U.S. government agencies	—		—		45,715		(4,285)		45,715		(4,285)
Municipal	46,448		(324)		69,700		(4,407)		116,148		(4,731)
Corporate notes:
Financial issuers	—		—		75,732		(8,264)		75,732		(8,264)
Other	993		(7)		—		—		993		(7)
Mortgage-backed: (1)
Residential mortgage-backed securities	1,567,822		(15,974)		2,277,921		(504,745)		3,845,743		(520,719)
Commercial (multi-family) mortgage-backed securities	12,686		(577)		—		—		12,686		(577)
Collateralized mortgage obligations	18,112		(83)		71,520		(18,087)		89,632		(18,170)
Total available-for-sale securities	$	1,707,236	$	(16,975)	$	2,540,588	$	(539,788)	$	4,247,824	$	(556,763)

(1)None of our mortgage-backed securities are subprime.

Schedule of Gross Gains and Gross Losses Realized and Impairment on Investment Securities

The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities recognized in earnings and proceeds received through the sale or call of investment securities:

	Three months ended March 31,
(In thousands)	2024		2023
Realized gains on investment securities	$	1,035	$	605
Realized losses on investment securities	(108)		(45)
Net realized gains on investment securities	927		560
Unrealized gains on equity securities with readily determinable fair value	1,034		2,290
Unrealized losses on equity securities with readily determinable fair value	(633)		(1,452)
Net unrealized gains on equity securities with readily determinable fair value	401		838
Impairment of equity securities without readily determinable fair values	(2)		—
Gains on investment securities, net	$	1,326	$	1,398

Schedule of Contractual Maturities of Investment Securities

The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of March 31, 2024, December 31, 2023 and March 31, 2023, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties:

	March 31, 2024				December 31, 2023				March 31, 2023
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale securities
Due in one year or less	$	107,680	$	107,285	$	53,162	$	52,945	$	108,880	$	108,429
Due in one to five years	130,137		121,417		132,348		123,985		131,959		122,172
Due in five to ten years	85,212		80,234		82,040		76,869		39,019		35,158
Due after ten years	17,904		15,269		18,705		15,782		64,194		58,112
Mortgage-backed	4,601,427		4,063,393		3,693,559		3,233,334		3,395,928		2,935,974
Total available-for-sale securities	$	4,942,360	$	4,387,598	$	3,979,814	$	3,502,915	$	3,739,980	$	3,259,845
Held-to-maturity securities
Due in one year or less	$	4,652	$	4,616	$	5,169	$	5,142	$	2,302	$	2,300
Due in one to five years	115,707		111,324		109,602		105,835		98,207		93,717
Due in five to ten years	89,538		88,050		99,700		98,718		110,967		110,892
Due after ten years	352,428		280,536		352,474		283,506		360,913		289,473
Mortgage-backed	3,248,019		2,627,428		3,290,318		2,722,267		3,034,465		2,479,816
Total held-to-maturity securities	$	3,810,344	$	3,111,954	$	3,857,263	$	3,215,468	$	3,606,854	$	2,976,198
Less: Allowance for credit losses	(329)				(347)				(463)
Held-to-maturity securities, net of allowance for credit losses	$	3,810,015			$	3,856,916			$	3,606,391

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Loans (Tables)

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Schedule of Loan Portfolio

The following table shows the Company’s loan portfolio by category as of the dates shown:

	March 31,			December 31,			March 31,
(Dollars in thousands)	2024			2023			2023
Balance:
Commercial	$	13,503,481		$	12,832,053		$	12,576,985
Commercial real estate	11,633,437			11,344,164			10,239,078
Home equity	340,349			343,976			337,016
Residential real estate	2,890,266			2,769,666			2,505,545
Premium finance receivables—property & casualty	6,940,019			6,903,529			5,738,880
Premium finance receivables—life insurance	7,872,033			7,877,943			8,125,802
Consumer and other	51,121			60,500			42,165
Total loans, net of unearned income	$	43,230,706		$	42,131,831		$	39,565,471
Mix:
Commercial	31		%	30		%	32		%
Commercial real estate	27			27			26
Home equity	1			1			1
Residential real estate	7			7			6
Premium finance receivables—property & casualty	16			16			14
Premium finance receivables—life insurance	18			19			21
Consumer and other	0			0			0
Total loans, net of unearned income	100		%	100		%	100		%

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Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2024

Credit Loss [Abstract]

Schedule of Aging of the Company's Loan Portfolio

The tables below show the aging of the Company’s loan portfolio by the segmentation noted above at March 31, 2024, December 31, 2023 and March 31, 2023:

As of March 31, 2024			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	31,740	$	27	$	30,248	$	77,715	$	13,363,751	$	13,503,481
Commercial real estate
Construction and development	1,627		—		818		7,066		2,140,803		2,150,314
Non-construction	37,635		—		15,895		25,932		9,403,661		9,483,123
Home equity	838		—		212		1,617		337,682		340,349
Residential real estate, excluding early buy-out loans	17,901		—		—		24,523		2,704,492		2,746,916
Premium finance receivables
Property and casualty insurance loans	32,648		25,877		15,274		59,729		6,806,491		6,940,019
Life insurance loans	—		—		32,482		100,137		7,739,414		7,872,033
Consumer and other	19		47		16		210		50,829		51,121
Total loans, net of unearned income, excluding early buy-out loans	$	122,408	$	25,951	$	94,945	$	296,929	$	42,547,123	$	43,087,356
Early buy-out loans guaranteed by U.S. government agencies (1)	—		50,217		—		1,047		92,086		143,350
Total loans, net of unearned income	$	122,408	$	76,168	$	94,945	$	297,976	$	42,639,209	$	43,230,706

As of December 31, 2023			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	38,940	$	98	$	19,488	$	85,743	$	12,687,784	$	12,832,053
Commercial real estate
Construction and development	2,205		—		251		1,343		2,080,242		2,084,041
Non-construction	33,254		—		8,264		19,291		9,199,314		9,260,123
Home equity	1,341		—		62		2,263		340,310		343,976
Residential real estate, excluding early buy-out loans	15,391		—		2,325		22,942		2,578,425		2,619,083
Premium finance receivables
Property and casualty insurance loans	27,590		20,135		23,236		50,437		6,782,131		6,903,529
Life insurance loans	—		—		16,206		45,464		7,816,273		7,877,943
Consumer and other	22		54		25		165		60,234		60,500
Total loans, net of unearned income, excluding early buy-out loans	$	118,743	$	20,287	$	69,857	$	227,648	$	41,544,713	$	41,981,248
Early buy-out loans guaranteed by U.S. government agencies (1)	—		57,688		250		328		92,317		150,583
Total loans, net of unearned income	$	118,743	$	77,975	$	70,107	$	227,976	$	41,637,030	$	42,131,831

(1)Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

As of March 31, 2023			90+ days and still accruing		60-89 days past due		30-59 days past due
(In thousands)	Nonaccrual								Current		Total Loans
Loan Balances (includes PCD):
Commercial
Commercial, industrial and other	$	47,950	$	—	$	10,755	$	95,593	$	12,422,687	$	12,576,985
Commercial real estate
Construction and development	5,404		—		4,438		19,616		1,567,595		1,597,053
Non-construction	5,792		—		16,101		53,064		8,567,068		8,642,025
Home equity	1,190		—		116		1,118		334,592		337,016
Residential real estate, excluding early buy-out loans	11,333		104		74		19,183		2,278,699		2,309,393
Premium finance receivables
Property and casualty insurance loans	18,543		9,215		14,287		32,545		5,664,290		5,738,880
Life insurance loans	—		1,066		21,552		52,975		8,050,209		8,125,802
Consumer and other	6		87		10		379		41,683		42,165
Total loans, net of unearned income, excluding early buy-out loans	$	90,218	$	10,472	$	67,333	$	274,473	$	38,926,823	$	39,369,319
Early buy-out loans guaranteed by U.S. government agencies (1)	29,245		36,920		—		1,485		128,502		196,152
Total loans, net of unearned income	$	119,463	$	47,392	$	67,333	$	275,958	$	39,055,325	$	39,565,471

(1)Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans.

Schedule of Loan Portfolio by Credit Quality Indicator

The table below shows the Company’s loan portfolio by credit quality indicator and year of origination at March 31, 2024:

	Year of Origination														Revolving		Total
(In thousands)	2024		2023		2022		2021		2020		Prior		Revolving		to Term		Loans
Loan Balances:
Commercial, industrial and other
Pass	$	970,127	$	2,650,822	$	1,998,311	$	1,433,144	$	590,652	$	1,200,791	$	3,979,064	$	5,677	$	12,828,588
Special mention	1,783		27,372		69,729		86,335		7,175		53,800		145,717		510		392,421
Substandard accrual	197		27,876		47,624		34,005		14,725		11,845		114,410		50		250,732
Substandard nonaccrual/doubtful	—		12,562		4,653		5,326		1,720		6,734		745		—		31,740
Total commercial, industrial and other	$	972,107	$	2,718,632	$	2,120,317	$	1,558,810	$	614,272	$	1,273,170	$	4,239,936	$	6,237	$	13,503,481
Construction and development
Pass	$	26,328	$	408,651	$	927,437	$	369,191	$	105,155	$	166,162	$	23,710	$	—	$	2,026,634
Special mention	—		417		—		17,091		—		15,143		—		—		32,651
Substandard accrual	—		—		2,495		35,215		2,480		49,212		—		—		89,402
Substandard nonaccrual/doubtful	—		499		—		—		—		1,128		—		—		1,627
Total construction and development	$	26,328	$	409,567	$	929,932	$	421,497	$	107,635	$	231,645	$	23,710	$	—	$	2,150,314
Non-construction
Pass	$	298,943	$	1,516,282	$	1,817,069	$	1,370,179	$	961,542	$	3,011,760	$	189,165	$	6,915	$	9,171,855
Special mention	—		10,190		34,072		46,822		22,865		52,411		—		—		166,360
Substandard accrual	—		1,174		2,480		1,972		19,098		82,549		—		—		107,273
Substandard nonaccrual/doubtful	—		883		453		192		—		36,107		—		—		37,635
Total non-construction	$	298,943	$	1,528,529	$	1,854,074	$	1,419,165	$	1,003,505	$	3,182,827	$	189,165	$	6,915	$	9,483,123
Home equity
Pass	$	—	$	—	$	—	$	—	$	—	$	9,518	$	314,674	$	1,271	$	325,463
Special mention	—		—		223		62		—		1,992		4,076		—		6,353
Substandard accrual	—		—		291		—		45		6,265		995		99		7,695
Substandard nonaccrual/doubtful	—		—		180		69		108		391		—		90		838
Total home equity	$	—	$	—	$	694	$	131	$	153	$	18,166	$	319,745	$	1,460	$	340,349
Residential real estate
Early buy-out loans guaranteed by U.S. government agencies	$	—	$	2,621	$	4,612	$	3,919	$	7,149	$	125,049	$	—	$	—	$	143,350
Pass	148,886		476,710		828,606		767,141		212,312		270,800		—		—		2,704,455

Special mention	—		1,842		3,945		2,610		1,310		5,191		—		—		14,898
Substandard accrual	64		908		2,157		490		1,023		5,020		—		—		9,662
Substandard nonaccrual/doubtful	—		98		4,474		4,553		798		7,978		—		—		17,901
Total residential real estate	$	148,950	$	482,179	$	843,794	$	778,713	$	222,592	$	414,038	$	—	$	—	$	2,890,266
Premium finance receivables - property and casualty
Pass	$	3,462,480	$	3,350,889	$	—	$	10,835	$	1,043	$	—	$	—	$	—	$	6,825,247
Special mention	23,586		53,219		121		44		—		—		—		—		76,970
Substandard accrual	598		4,460		92		4		—		—		—		—		5,154
Substandard nonaccrual/doubtful	451		31,397		753		45		2		—		—		—		32,648
Total premium finance receivables - property and casualty	$	3,487,115	$	3,439,965	$	966	$	10,928	$	1,045	$	—	$	—	$	—	$	6,940,019
Premium finance receivables - life
Pass	$	997,609	$	6,871,203	$	3,221	$	—	$	—	$	—	$	—	$	—	$	7,872,033
Special mention	—		—		—		—		—		—		—		—		—
Substandard accrual	—		—		—		—		—		—		—		—		—
Substandard nonaccrual/doubtful	—		—		—		—		—		—		—		—		—
Total premium finance receivables - life	$	997,609	$	6,871,203	$	3,221	$	—	$	—	$	—	$	—	$	—	$	7,872,033
Consumer and other
Pass	$	610	$	3,092	$	935	$	760	$	73	$	3,670	$	41,790	$	—	$	50,930
Special mention	—		8		14		7		—		77		1		—		107
Substandard accrual	—		14		13		—		—		29		9		—		65
Substandard nonaccrual/doubtful	—		7		9		3		—		—		—		—		19
Total consumer and other	$	610	$	3,121	$	971	$	770	$	73	$	3,776	$	41,800	$	—	$	51,121
Total loans
Early buy-out loans guaranteed by U.S. government agencies	$	—	$	2,621	$	4,612	$	3,919	$	7,149	$	125,049	$	—	$	—	$	143,350
Pass	5,904,983		15,277,649		5,575,579		3,951,250		1,870,777		4,662,701		4,548,403		13,863		41,805,205
Special mention	25,369		93,048		108,104		152,971		31,350		128,614		149,794		510		689,760
Substandard accrual	859		34,432		55,152		71,686		37,371		154,920		115,414		149		469,983
Substandard nonaccrual/doubtful	451		45,446		10,522		10,188		2,628		52,338		745		90		122,408
Total loans	$	5,931,662	$	15,453,196	$	5,753,969	$	4,190,014	$	1,949,275	$	5,123,622	$	4,814,356	$	14,612	$	43,230,706
Gross write offs
Three months ended March 31, 2024	99		13,085		2,129		660		1,965		5,903		—		—		23,841

Schedule of Held-to-Maturity Debt Securities by Credit Quality Indicator

For purposes of the table below, the Company has converted any issuer rating from an NRSRO into the Company’s internal ratings based on Investment Policy and review by the Company’s management.

As of March 31, 2024	Year of Origination												Total
(In thousands)	2024		2023		2022		2021		2020		Prior		Balance
Amortized Cost Balances:
U.S. government agencies
1-4 internal grade	$	—	$	—	$	156,875	$	147,813	$	25,000	$	6,775	$	336,463
5-7 internal grade													—
8-10 internal grade													—
Total U.S. government agencies	$	—	$	—	$	156,875	$	147,813	$	25,000	$	6,775	$	336,463
Municipal
1-4 internal grade	$	—	$	4,176	$	1,037	$	6,886	$	258	$	156,133	$	168,490
5-7 internal grade													—
8-10 internal grade													—
Total municipal	$	—	$	4,176	$	1,037	$	6,886	$	258	$	156,133	$	168,490
Mortgage-backed securities
1-4 internal grade	$	—	$	372,240	$	566,684	$	2,309,095	$	—	$	—	$	3,248,019
5-7 internal grade													—
8-10 internal grade													—
Total mortgage-backed securities	$	—	$	372,240	$	566,684	$	2,309,095	$	—	$	—	$	3,248,019
Corporate notes
1-4 internal grade	$	—	$	—	$	14,967	$	—	$	6,006	$	36,399	$	57,372
5-7 internal grade													—
8-10 internal grade													—
Total corporate notes	$	—	$	—	$	14,967	$	—	$	6,006	$	36,399	$	57,372
Total held-to-maturity securities													$	3,810,344
Less: Allowance for credit losses													(329)
Held-to-maturity securities, net of allowance for credit losses													$	3,810,015

Schedule of Allowance for Credit Losses

As significant judgment is required, the review of the appropriateness of the allowance for credit losses is performed quarterly by various committees with participation by the Company's executive management.

	March 31,		December 31,		March 31,
(In thousands)	2024		2023		2023
Allowance for loan losses	$	348,612	$	344,235	$	287,972
Allowance for unfunded lending-related commitments losses	78,563		83,030		87,826
Allowance for loan losses and unfunded lending-related commitments losses	427,175		427,265		375,798
Allowance for held-to-maturity securities losses	329		347		463
Allowance for credit losses	$	427,504	$	427,612	$	376,261

Schedule of Activity in the Allowance for Credit Losses by Loan Portfolio

A summary of activity in the allowance for credit losses, specifically for the loan portfolio (i.e. allowance for loan losses and allowance for unfunded commitment losses), for the three months ended March 31, 2024 and March 31, 2023 is as follows:

Three months ended March 31, 2024			Commercial Real Estate		Home  Equity		Residential Real Estate		Premium Finance Receivables		Consumer and Other		Total Loans
(In thousands)	Commercial
Allowance for credit losses at beginning of period	$	169,604	$	223,853	$	7,116	$	13,133	$	13,069	$	490	$	427,265
Other adjustments	—		—		—		—		(31)		—		(31)
Charge-offs	(11,215)		(5,469)		(74)		(38)		(6,938)		(107)		(23,841)
Recoveries	479		31		29		2		1,527		23		2,091
Provision for credit losses	7,650		7,637		120		604		5,703		(23)		21,691
Allowance for credit losses at period end	$	166,518	$	226,052	$	7,191	$	13,701	$	13,330	$	383	$	427,175
By measurement method:
Individually measured	$	13,989	$	1,784	$	—	$	59	$	—	$	9	$	15,841
Collectively measured	152,529		224,268		7,191		13,642		13,330		374		411,334
Loans at period end
Individually measured	$	31,740	$	39,262	$	838	$	17,509	$	—	$	19	$	89,368
Collectively measured	13,471,741		11,594,175		339,511		2,728,392		14,812,052		51,102		42,996,973
Loans held at fair value	—		—		—		144,365		—		—		144,365

Three months ended March 31, 2023	Commercial		Commercial Real Estate		Home  Equity		Residential Real Estate		Premium Finance Receivables		Consumer and Other		Total Loans
(In thousands)
Allowance for credit losses at beginning of period	$	142,769	$	184,352	$	7,573	$	11,585	$	10,671	$	498	$	357,448
Cumulative effect adjustment from the adoption of ASU 2022-02 (TDR), net of tax	111		1,356		(33)		(692)		—		(1)		741
Other adjustments	—		—		—		—		4		—		4
Charge-offs	(2,543)		(5)		—		—		(4,650)		(153)		(7,351)
Recoveries	392		100		35		4		1,323		32		1,886
Provision for credit losses	8,772		8,977		153		537		4,607		24		23,070
Allowance for credit losses at period end	$	149,501	$	194,780	$	7,728	$	11,434	$	11,955	$	400	$	375,798
By measurement method:
Individually measured	$	11,281	$	1,621	$	—	$	—	$	—	$	1	$	12,903
Collectively measured	138,220		193,159		7,728		11,434		11,955		399		362,895
Loans at period end
Individually measured	$	47,950	$	11,196	$	1,190	$	11,280	$	—	$	6	$	71,622
Collectively measured	12,529,035		10,227,882		335,826		2,286,733		13,864,682		42,159		39,286,317
Loans held at fair value	—		—		—		207,532		—		—		207,532

Schedule of Modification of Loans

The tables below presents a summary of the period-end balance of loans to borrowers experiencing financial difficulties during the three months ended March 31, 2024 and 2023:

Three months ended March 31, 2024  (Dollars in thousands)	Total		Percentage of Total Class of Loan		Extension of Term		Reduction of  Interest Rate		Delay in Contractual Payments		Extension of Term and Reduction of Interest Rate
Commercial
Commercial, industrial and other	$	1,629	0.0	%	$	1,502	$	—	$	—	$	127
Commercial real estate
Non-construction	1,176		0.0		293		—		883		—
Home equity	98		0.0		98		—		—		—
Residential real estate	218		0.0		35		183		—		—
Premium finance receivables
Property and casualty insurance loans	1		0.0		1		—		—		—
Total loans	$	3,122	0.0	%	$	1,929	$	183	$	883	$	127

			Weighted average magnitude of modifications:
Three months ended March 31, 2024  (Dollars in thousands)	Total		Duration of Extension of Term (months)	Reduction of  Interest Rate (bps)	Duration of Delay in Contractual Payments (months)
Commercial
Commercial, industrial and other	$	1,629	10	219	—
Commercial real estate
Non-construction	1,176		47	—	16
Home equity	98		12	—	—
Residential real estate	218		37	201	—
Premium finance receivables
Property and casualty insurance loans	1		0	—	—
Total loans	$	3,122	16	215	16

Three Months Ended March 31, 2023 (Dollars in thousands)	Total		Percentage of Total Class of Loan		Extension of Term		Reduction of  Interest Rate		Delay in Contractual Payments		Extension of Term and Reduction of Interest Rate
Commercial
Commercial, industrial and other	$	37,474	0.3	%	$	1,938	$	221	$	35,265	$	50
Commercial real estate
Non-construction	1,333		0.0		467		827		39		—
Home equity	203		0.1		203		—		—		—
Residential real estate	1,708		0.1		1,253		271		—		184
Premium finance receivables
Property and casualty insurance loans	11		0.0		3		—		—		8
Total loans	$	40,729	0.1	%	$	3,864	$	1,319	$	35,304	$	242

			Weighted average magnitude of modifications:
Three months ended March 31, 2023 (Dollars in thousands)	Total		Duration of Extension of Term (months)	Reduction of  Interest Rate (bps)	Duration of Delay in Contractual Payments (months)
Commercial
Commercial, industrial and other	$	37,474	10	52	16
Commercial real estate
Non-construction	1,333		51	342	101
Home equity	203		12	—	—
Residential real estate	1,708		45	290	—
Premium finance receivables
Property and casualty insurance loans	11		0	50	—
Total loans	$	40,729	27	275	17

Schedule of Loans for Borrowers Experiencing Financial Difficulties Modified

The following table presents a summary of all modified loans for borrowers experiencing financial difficulties and such loans that were in payment default under the restructured terms during the respective periods below.

(Dollars in thousands)	For the Twelve Months Ended March 31, 2024		Three Months Ended March 31, 2024		For the Three Months Ended March 31, 2023		Three Months Ended March 31, 2023
	Total		Payments in Default  (1)		Total		Payments in Default  (1)
Commercial
Commercial, industrial and other	$	16,011	$	244	$	37,474	$	2
Commercial real estate
Construction and development	2,495		—		—		—
Non-construction	6,161		603		1,333		828
Home equity	616		19		203		104
Residential real estate	612		144		1,708		—
Premium finance receivables
Property and casualty insurance loans	81		—		11		11
Total loans	$	25,976	$	1,010	$	40,729	$	945

(1)Modified loans considered to be in payment default are over 30 days past due subsequent to the restructuring.

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Goodwill and Other Acquisition-Related Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill Assets by Business Segment

A summary of the Company’s goodwill assets by reporting unit is presented in the following table:

(In thousands)	December 31, 2023		Goodwill Acquired		Impairment Loss		Goodwill Adjustments		March 31, 2024
Community banking	$	545,671	$	—	$	—	$	—	$	545,671
Specialty finance	39,006		—		—		(491)		38,515
Wealth management	71,995		—		—		—		71,995
Total	$	656,672	$	—	$	—	$	(491)	$	656,181

Schedule of Indefinite-Lived Intangible Assets

A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of March 31, 2024 is as follows:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	55,206	$	55,206	$	55,206
Accumulated amortization	(46,899)		(46,125)		(43,473)
Net carrying amount	$	8,307	$	9,081	$	11,733
Trademark with indefinite lives:
Carrying amount	5,800		5,800		5,800
Total net carrying amount	$	14,107	$	14,881	$	17,533
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,962	$	1,963	$	1,962
Accumulated amortization	(1,849)		(1,837)		(1,799)
Net carrying amount	$	113	$	126	$	163
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	26,630	$	26,630	$	20,430
Accumulated amortization	(19,120)		(18,748)		(17,175)
Net carrying amount	$	7,510	$	7,882	$	3,255
Total acquisition-related intangible assets:
Gross carrying amount	$	89,598	$	89,599	$	83,398
Accumulated amortization	(67,868)		(66,710)		(62,447)
Total other acquisition-related intangible assets, net	$	21,730	$	22,889	$	20,951

Summary of Finite-Lived Intangible Assets

A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of March 31, 2024 is as follows:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	55,206	$	55,206	$	55,206
Accumulated amortization	(46,899)		(46,125)		(43,473)
Net carrying amount	$	8,307	$	9,081	$	11,733
Trademark with indefinite lives:
Carrying amount	5,800		5,800		5,800
Total net carrying amount	$	14,107	$	14,881	$	17,533
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,962	$	1,963	$	1,962
Accumulated amortization	(1,849)		(1,837)		(1,799)
Net carrying amount	$	113	$	126	$	163
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	26,630	$	26,630	$	20,430
Accumulated amortization	(19,120)		(18,748)		(17,175)
Net carrying amount	$	7,510	$	7,882	$	3,255
Total acquisition-related intangible assets:
Gross carrying amount	$	89,598	$	89,599	$	83,398
Accumulated amortization	(67,868)		(66,710)		(62,447)
Total other acquisition-related intangible assets, net	$	21,730	$	22,889	$	20,951

Schedule of Estimated Amortization

Estimated amortization
Actual in three months ended March 31, 2024	$	1,158
Estimated remaining in 2024	3,143
Estimated—2025	3,482
Estimated—2026	2,772
Estimated—2027	2,156
Estimated—2028	1,591

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Mortgage Servicing Rights ("MSRs") (Tables)

3 Months Ended

Mar. 31, 2024

Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]

Schedule of Changes in the Carrying Value of MSRs

The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated:

	Three Months Ended
	March 31,		March 31,
(In thousands)	2024		2023
Fair value at beginning of the period	$	192,456	230,225
Additions from loans sold with servicing retained	5,379		5,107
Estimate of changes in fair value due to:
Payoffs, paydowns and repurchases	(4,386)		(3,909)
Changes in valuation inputs or assumptions	7,595		(6,953)
Fair value at end of the period	$	201,044	$	224,470
Unpaid principal balance of mortgage loans serviced for others	$	12,051,392	$	14,080,461

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Deposits (Tables)

3 Months Ended

Mar. 31, 2024

Deposits [Abstract]

Schedule of Deposits

The following table is a summary of deposits as of the dates shown: 

(Dollars in thousands)	March 31, 2024			December 31, 2023			March 31, 2023
Balance:
Non-interest-bearing	$	9,908,183		$	10,420,401		$	11,236,083
NOW and interest-bearing demand deposits	5,720,947			5,797,649			5,576,558
Wealth management deposits	1,347,817			1,614,499			1,809,933
Money market	15,617,717			15,149,215			13,552,277
Savings	5,959,774			5,790,334			5,192,108
Time certificates of deposit	7,894,420			6,625,072			5,351,252
Total deposits	$	46,448,858		$	45,397,170		$	42,718,211
Mix:
Non-interest-bearing	21		%	23		%	26		%
NOW and interest-bearing demand deposits	12			13			13
Wealth management deposits	3			4			4
Money market	34			33			32
Savings	13			13			12
Time certificates of deposit	17			14			13
Total deposits	100		%	100		%	100		%

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FHLB Advances, Other Borrowings and Subordinated Notes (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of FHLB Advances, Other Borrowings and Subordinated Notes

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023
FHLB advances	$	2,676,751	$	2,326,071	$	2,316,071
Other borrowings:
Notes payable	164,153		171,282		192,666
Short-term borrowings	10,869		13,430		10,124
Secured borrowings	341,704		401,897		320,007
Other	58,682		59,204		60,751
Total other borrowings	575,408		645,813		583,548
Subordinated notes	437,965		437,866		437,493
Total FHLB advances, other borrowings and subordinated notes	$	3,690,124	$	3,409,750	$	3,337,112

Schedule of Financial Instruments Owned and Pledged as Collateral

The following is a summary of these securities pledged as of March 31, 2024 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(In thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	16,632
Excess collateral	5,763
Securities sold under repurchase agreements	$	10,869

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Junior Subordinated Debentures (Tables)

3 Months Ended

Mar. 31, 2024

Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]

Schedule of Junior Subordinated Debentures

The following table provides a summary of the Company’s junior subordinated debentures as of March 31, 2024. The junior subordinated debentures represent the par value of the obligations owed to the Trusts.

(Dollars in thousands)	Common Securities		Trust  Preferred Securities		Junior Subordinated Debentures		Rate Structure (1)	Contractual Rate at 3/31/2024		Issue Date	Maturity Date	Earliest Redemption Date
Wintrust Capital Trust III	$	774	$	25,000	$	25,774	S+0.26161+3.25	8.83	%	04/2003	04/2033	04/2008
Wintrust Statutory Trust IV	619		20,000		20,619		S+0.26161+2.80	8.36	%	12/2003	12/2033	12/2008
Wintrust Statutory Trust V	1,238		40,000		41,238		S+0.26161+2.60	8.16	%	05/2004	05/2034	06/2009
Wintrust Capital Trust VII	1,550		50,000		51,550		S+0.26161+1.95	7.54	%	12/2004	03/2035	03/2010
Wintrust Capital Trust VIII	1,238		25,000		26,238		S+0.26161+1.45	7.01	%	08/2005	09/2035	09/2010
Wintrust Capital Trust IX	1,547		50,000		51,547		S+0.26161+1.63	7.22	%	09/2006	09/2036	09/2011
Northview Capital Trust I	186		6,000		6,186		S+0.26161+3.00	8.57	%	08/2003	11/2033	08/2008
Town Bankshares Capital Trust I	186		6,000		6,186		S+0.26161+3.00	8.57	%	08/2003	11/2033	08/2008
First Northwest Capital Trust I	155		5,000		5,155		S+0.26161+3.00	8.56	%	05/2004	05/2034	05/2009
Suburban Illinois Capital Trust II	464		15,000		15,464		S+0.26161+1.75	7.34	%	12/2006	12/2036	12/2011
Community Financial Shares Statutory Trust II	109		3,500		3,609		S+0.26161+1.62	7.21	%	06/2007	09/2037	06/2012
Total					$	253,566		7.77	%

(1)The interest rates on the variable rate junior subordinated debentures are based on the three-month Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) and reset on a quarterly basis.

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Schedule of Operating Information for Reportable Segments

The following is a summary of certain operating information for reportable segments:

	Three Months Ended				$ Change in Contribution		% Change  in Contribution
(Dollars in thousands)	March 31, 2024		March 31, 2023
Net interest income:
Community Banking	$	363,685	$	369,848	$	(6,163)	(2)	%
Specialty Finance	82,282		70,351		11,931		17
Wealth Management	7,758		8,955		(1,197)		(13)
Total Operating Segments	453,725		449,154		4,571		1
Intersegment Eliminations	10,469		8,841		1,628		18
Consolidated net interest income	$	464,194	$	457,995	$	6,199	1	%
Provision for credit losses:
Community Banking	$	20,392	$	21,099	$	(707)	(3)	%
Specialty Finance	1,281		1,946		(665)		(34)
Wealth Management	—		—		—		—
Total Operating Segments	21,673		23,045		(1,372)		(6)
Intersegment Eliminations	—		—		—		—
Consolidated provision for credit losses	$	21,673	$	23,045	$	(1,372)	(6)	%
Non-interest income:
Community Banking	$	74,636	$	68,733	$	5,903	9	%
Specialty Finance	27,317		25,790		1,527		6
Wealth Management	58,485		30,297		28,188		93
Total Operating Segments	160,438		124,820		35,618		29
Intersegment Eliminations	(19,858)		(17,051)		(2,807)		16
Consolidated non-interest income	$	140,580	$	107,769	$	32,811	30	%
Net revenue:
Community Banking	$	438,321	$	438,581	$	(260)	0	%
Specialty Finance	109,599		96,141		13,458		14
Wealth Management	66,243		39,252		26,991		69
Total Operating Segments	614,163		573,974		40,189		7
Intersegment Eliminations	(9,389)		(8,210)		(1,179)		14
Consolidated net revenue	$	604,774	$	565,764	$	39,010	7	%
Segment profit:
Community Banking	$	120,046	$	134,232	$	(14,186)	(11)	%
Specialty Finance	42,523		36,737		5,786		16
Wealth Management	24,725		9,229		15,496		168
Consolidated net income	$	187,294	$	180,198	$	7,096	4	%
Segment assets:
Community Banking	$	45,720,014	$	41,611,980	$	4,108,034	10	%
Specialty Finance	10,713,783		9,841,044		872,739		9
Wealth Management	1,143,136		1,420,487		(277,351)		(20)
Consolidated total assets	$	57,576,933	$	52,873,511	$	4,703,422	9	%

NM - Not meaningful

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Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Value of Derivative Financial Instruments

The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2024, December 31, 2023 and March 31, 2023:

	Derivative Assets						Derivative Liabilities
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Derivatives designated as hedging instruments under ASC 815:
Interest rate derivatives designated as Cash Flow Hedges	$	12,985	$	40,116	$	25,730	$	94,758	$	44,456	$	43,412
Interest rate derivatives designated as Fair Value Hedges	13,443		12,349		13,732		21		273		—
Total derivatives designated as hedging instruments under ASC 815	$	26,428	$	52,465	$	39,462	$	94,779	$	44,729	$	43,412
Derivatives not designated as hedging instruments under ASC 815:
Interest rate derivatives	$	222,505	$	211,490	$	219,869	$	223,384	$	210,397	$	219,053
Interest rate lock commitments	6,212		4,511		5,356		21		—		67
Forward commitments to sell mortgage loans	169		—		121		2,549		5,212		2,953
Commodity forward contracts	685		888		491		416		609		315
Foreign exchange contracts	3,265		6,372		8,705		3,215		6,308		8,632
Total derivatives not designated as hedging instruments under ASC 815	$	232,836	$	223,261	$	234,542	$	229,585	$	222,526	$	231,020
Total Derivatives	$	259,264	$	275,726	$	274,004	$	324,364	$	267,255	$	274,432

Schedule of Cash Flow Hedging Instruments

The table below provides details on these cash flow hedges, summarized by derivative type and maturity, as of March 31, 2024:

	March 31, 2024
	Notional		Fair Value
(In thousands)	Amount		Asset (Liability)
Interest Rate Collars at 1-month CME term SOFR:
Buy 2.250% floor, sell 3.743% cap; matures September 2025	$	1,250,000	$	(18,054)
Buy 2.750% floor, sell 4.320% cap; matures October 2026	500,000		(4,246)
Buy 2.000% floor, sell 3.450% cap; matures September 2027	1,250,000		(36,414)
Interest Rate Swaps at 1-month CME term SOFR:
Fixed 3.748%; matures December 2025	250,000		(3,420)
Fixed 3.759%; matures December 2025	250,000		(3,373)
Fixed 3.680%; matures February 2026	250,000		(3,715)
Fixed 4.176%; matures March 2026	250,000		(1,439)
Fixed 3.915%; matures March 2026	250,000		(2,643)
Fixed 4.450%; matures July 2026	250,000		410
Fixed 3.515%, matures December 2026	250,000		(4,681)
Fixed 3.512%; matures December 2026	250,000		(4,700)
Fixed 3.453%; matures February 2027	250,000		(5,086)
Fixed 4.150%; matures July 2027	250,000		199
Fixed 3.748%; matures March 2028	250,000		(2,483)
Fixed 3.526%; matures March 2028	250,000		(4,504)
Fixed 3.993%; matures October 2029	100,000		1,150
Fixed 3.993%; matures October 2029	250,000		2,876
Fixed 4.245%; matures November 2029	175,000		4,175
Fixed 4.245%; matures November 2029	175,000		4,175
Total Cash Flow Hedges	$	6,700,000	$	(81,773)

Schedule of Amounts in Accumulated Other Comprehensive Income Related to Interest Rate Swaps Designated as Cash Flow Hedges

A rollforward of the amounts in accumulated other comprehensive income or loss related to interest rate derivatives designated as cash flow hedges, including such derivative contracts terminated during the period, follows:

	Three Months Ended
(In thousands)	March 31, 2024		March 31, 2023
Unrealized gain at beginning of period	$	43,538	$	10,026
Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings	19,818		3,747
Amount of loss recognized in other comprehensive income or loss	(101,909)		30,919
Unrealized (loss) gain at end of period	$	(38,553)	$	44,692

Schedule of Carrying Amount of Hedged Assets/(Liabilities)

The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of March 31, 2024:

(In thousands)		March 31, 2024
Derivatives in Fair Value Hedging Relationships	Location in the Statement of Condition	Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued
Interest rate swaps	Loans, net of unearned income	$	201,019	$	(13,487)	$	(75)
	Available-for-sale debt securities	712		(19)		—

The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective period:

(In thousands) Derivatives in Fair Value Hedging Relationships	Location of (Loss)/Gain Recognized in Income on Derivative	Three Months Ended
		March 31, 2024
Interest rate swaps	Interest and fees on loans	$	10
	Interest income - investment securities	—

Schedule of Consolidated Statement of Income Related to Derivatives

Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows:

(In thousands)		Three Months Ended
Derivative	Location in income statement	March 31, 2024		March 31, 2023
Interest rate swaps and caps	Trading gains, net	$	595	$	800
Mortgage banking derivatives	Mortgage banking revenue	(15)		3,640
Commodity contracts	Trading gains, net	268		177
Foreign exchange contracts	Trading gains, net	8		—
Covered call options	Fees from covered call options	4,847		10,391
Derivative contract held as economic hedge on MSRs	Mortgage banking revenue	(2,577)		946

Schedule of Offsetting Assets

The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets						Derivative Liabilities
	Fair Value						Fair Value
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Gross Amounts Recognized	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Less: Amounts offset in the Statements of Condition	—		—		—		—		—		—
Net amount presented in the Statements of Condition	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Gross amounts not offset in the Statements of Condition
Offsetting Derivative Positions	(109,977)		(76,514)		(55,838)		(109,977)		(76,514)		(55,838)
Collateral Posted	(119,572)		(144,899)		(181,884)		—		—		—
Net Credit Exposure	$	19,384	$	42,542	$	21,609	$	208,186	$	178,612	$	206,627

Schedule of Offsetting Liabilities

The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets						Derivative Liabilities
	Fair Value						Fair Value
(In thousands)	March 31, 2024		December 31, 2023		March 31, 2023		March 31, 2024		December 31, 2023		March 31, 2023
Gross Amounts Recognized	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Less: Amounts offset in the Statements of Condition	—		—		—		—		—		—
Net amount presented in the Statements of Condition	$	248,933	$	263,955	$	259,331	$	318,163	$	255,126	$	262,465
Gross amounts not offset in the Statements of Condition
Offsetting Derivative Positions	(109,977)		(76,514)		(55,838)		(109,977)		(76,514)		(55,838)
Collateral Posted	(119,572)		(144,899)		(181,884)		—		—		—
Net Credit Exposure	$	19,384	$	42,542	$	21,609	$	208,186	$	178,612	$	206,627

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Fair Values of Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented:

	March 31, 2024
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	61,175	$	61,175	$	—	$	—
U.S. government agencies	45,715		—		45,715		—
Municipal	140,590		—		52,371		88,219
Corporate notes	76,725		—		76,725		—
Mortgage-backed	4,063,393		—		4,063,393		—
Trading account securities	2,184		—		2,184		—
Equity securities with readily determinable fair value	119,777		111,711		8,066		—
Mortgage loans held-for-sale	339,884		—		306,158		33,726
Loans held-for-investment	144,371		—		95,054		49,317
MSRs	201,044		—		—		201,044
Nonqualified deferred compensation assets	15,953		—		15,953		—
Derivative assets	259,264		—		253,052		6,212
Total	$	5,470,075	$	172,886	$	4,918,671	$	378,518
Derivative liabilities	$	324,364	$	—	$	324,364	$	—

	December 31, 2023
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	6,968	$	6,968	$	—	$	—
U.S. government agencies	45,124		—		45,124		—
Municipal	140,958		—		54,721		86,237
Corporate notes	76,531		—		76,531		—
Mortgage-backed	3,233,334		—		3,233,334		—
Trading account securities	4,707		—		4,707		—
Equity securities with readily determinable fair value	139,268		131,202		8,066		—
Mortgage loans held-for-sale	292,722		—		265,887		26,835
Loans held-for-investment	155,261		—		94,591		60,670
MSRs	192,456		—		—		192,456
Nonqualified deferred compensation assets	15,238		—		15,238		—
Derivative assets	275,726		—		271,216		4,510
Total	$	4,578,293	$	138,170	$	4,069,415	$	370,708
Derivative liabilities	$	267,255	$	—	$	267,255	$	—

	March 31, 2023
(In thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	4,948	$	4,948	$	—	$	—
U.S. government agencies	74,862		—		74,862		—
Municipal	160,386		—		48,129		112,257
Corporate notes	83,675		—		83,675		—
Mortgage-backed	2,935,974		—		2,935,974		—
Trading account securities	102		—		102		—
Equity securities with readily determinable fair value	111,943		103,877		8,066		—
Mortgage loans held-for-sale	302,493		—		258,243		44,250
Loans held-for-investment	202,143		—		132,650		69,493
MSRs	224,470		—		—		224,470
Nonqualified deferred compensation assets	14,379		—		14,379		—
Derivative assets	274,004		—		268,648		5,356
Total	$	4,389,379	$	108,825	$	3,824,728	$	455,826
Derivative liabilities	$	274,432	$	—	$	274,432	$	—

Schedule of Changes In Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis

The changes in Level 3 assets measured at fair value on a recurring basis during the three months ended March 31, 2024 and 2023 are summarized as follows:

			Mortgage loans held-for-sale		Loans held-for- investment		Mortgage servicing rights		Derivative assets
(In thousands)	Municipal
Balance at January 1, 2024	$	86,237	$	26,835	$	60,670	$	192,456	$	4,510
Total net (losses) gains included in:
Net income (1)	—		67		(317)		8,588		1,702
Other comprehensive income or loss	(1,988)		—		—		—		—
Purchases	8,384		—		—		—		—
Settlements	(4,414)		(10,340)		(15,803)		—		—
Net transfers into Level 3	—		17,164		4,767		—		—
Balance at March 31, 2024	$	88,219	$	33,726	$	49,317	$	201,044	$	6,212

			Mortgage loans held-for-sale		Loans held-for- investment		Mortgage servicing rights		Derivative assets
(In thousands)	Municipal
Balance at January 1, 2023	$	117,537	$	48,655	$	84,165	$	230,225	$	1,711
Total net (losses) gains included in:
Net income (1)	—		466		364		(5,755)		3,645
Other comprehensive income or loss	(1,662)		—		—		—		—
Purchases	4,418		—		—		—		—
Settlements	(8,036)		(18,619)		(20,322)		—		—
Net transfers into Level 3	—		13,748		5,286		—		—
Balance at March 31, 2023	$	112,257	$	44,250	$	69,493	$	224,470	$	5,356

(1)Changes in the balance of mortgage loans held-for-sale, MSRs, and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

Schedule of Assets Measured at Fair Value on a Nonrecurring Basis

For assets measured at fair value on a non-recurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at March 31, 2024:

	March 31, 2024								Three Months Ended March 31, 2024 Fair Value Losses Recognized, net
(In thousands)	Total		Level 1		Level 2		Level 3
Individually assessed loans - foreclosure probable and collateral-dependent	$	89,368	$	—	$	—	$	89,368	$	16,726
Other real estate owned (1)	14,538		—		—		14,538		207
Total	$	103,906	$	—	$	—	$	103,906	$	16,933

(1)Net fair value losses recognized on other real estate owned include valuation adjustments and charge-offs during the respective period.

Schedule of Valuation Techniques and Significant Unobservable Inputs Used to Measure Both Recurring and Non Recurring

The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at March 31, 2024 were as follows:

(Dollars in thousands)	Fair Value		Valuation Methodology	Significant Unobservable Input	Range of Inputs	Weighted Average of Inputs			Impact to valuation from an increased or higher input value
Measured at fair value on a recurring basis:
Municipal securities	$	88,219	Bond pricing	Equivalent rating	BBB-AA+	N/A			Increase
Mortgage loans held-for-sale	33,726		Discounted cash flows	Discount rate	6.60%	6.60%			Decrease
				Credit discount	0% - 12%	0.43%			Decrease
Loans held-for-investment	49,317		Discounted cash flows	Discount rate	6.60% - 6.63%	6.60%			Decrease
				Credit discount	0% - 16%	1.18%			Decrease
				Constant prepayment rate (CPR) - current loans	7.78%	7.78%			Decrease
				Average life - delinquent loans (in years)	1.1 years - 10.6 years	5.9 years			Decrease
MSRs	201,044		Discounted cash flows	Discount rate	1% - 21%	10.99%			Decrease
				Constant prepayment rate (CPR)	0% - 90%	7.78%			Decrease
				Cost of servicing	$70 - $200	$	77		Decrease
				Cost of servicing - delinquent	$200 - 1,000	$	394		Decrease
Derivatives	6,212		Discounted cash flows	Pull-through rate	6% - 100%	82.11		%	Increase
Measured at fair value on a non-recurring basis:
Individually assessed loans - foreclosure probable and collateral-dependent	89,368		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%			Decrease
Other real estate owned	14,538		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%			Decrease

Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments

The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown:

	At March 31, 2024				At December 31, 2023				At March 31, 2023
	Carrying		Fair		Carrying		Fair		Carrying		Fair
(In thousands)	Value		Value		Value		Value		Value		Value
Financial Assets:
Cash and cash equivalents	$	379,886	$	379,886	$	423,464	$	423,464	$	445,986	$	445,986
Interest-bearing deposits with banks	2,131,077		2,131,077		2,084,323		2,084,323		1,563,578		1,563,578
Available-for-sale securities	4,387,598		4,387,598		3,502,915		3,502,915		3,259,845		3,259,845
Held-to-maturity securities	3,810,015		3,111,954		3,856,916		3,215,468		3,606,391		2,976,198
Trading account securities	2,184		2,184		4,707		4,707		102		102
Equity securities with readily determinable fair value	119,777		119,777		139,268		139,268		111,943		111,943
FHLB and FRB stock, at cost	224,657		224,657		205,003		205,003		244,957		244,957
Brokerage customer receivables	13,382		13,382		10,592		10,592		16,042		16,042
Mortgage loans held-for-sale, at fair value	339,884		339,884		292,722		292,722		302,493		302,493
Loans held-for-investment, at fair value	144,371		144,371		155,261		155,261		202,143		202,143
Loans held-for-investment, at amortized cost	43,086,335		42,068,619		41,976,570		41,090,010		39,363,328		38,577,761
Nonqualified deferred compensation assets	15,953		15,953		15,238		15,238		14,379		14,379
Derivative assets	259,264		259,264		275,726		275,726		274,004		274,004
Accrued interest receivable and other	487,933		487,933		477,832		477,832		417,066		417,066
Total financial assets	$	55,402,316	$	53,686,539	$	53,420,537	$	51,892,529	$	49,822,257	$	48,406,497
Financial Liabilities
Non-maturity deposits	$	38,554,438	$	38,554,438	$	38,772,098	$	38,772,098	$	37,366,959	$	37,366,959
Time certificates of deposit	7,894,420		7,872,870		6,625,072		6,603,746		5,351,252		4,970,556
FHLB advances	2,676,751		2,669,780		2,326,071		2,367,107		2,316,071		2,255,580
Other borrowings	575,408		573,752		645,813		643,755		583,548		555,615
Subordinated notes	437,965		413,003		437,866		413,501		437,493		410,827
Junior subordinated debentures	253,566		253,574		253,566		253,579		253,566		252,663
Derivative liabilities	324,364		324,364		267,255		267,255		274,432		274,432
Accrued interest payable	64,943		64,943		51,116		51,116		42,015		42,015
Total financial liabilities	$	50,781,855	$	50,726,724	$	49,378,857	$	49,372,157	$	46,625,336	$	46,128,647

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Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Stock Option Activity

A summary of the Plans’ stock option activity for the three months ended March 31, 2024 and March 31, 2023 is presented below:

Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2024	13,100	$	42.76
Granted	—	—
Exercised	(775)	32.26
Forfeited or canceled	—	—
Outstanding at March 31, 2024	12,325	$	43.42	4.2	$	751
Exercisable at March 31, 2024	12,325	$	43.42	4.2	$	751

Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2023	68,093	$	41.14
Granted	—	—
Exercised	(54,218)	40.87
Forfeited or canceled	—	—
Outstanding at March 31, 2023	13,875	$	42.18	4.7	$	427
Exercisable at March 31, 2023	13,875	$	42.18	4.7	$	427

(1)Represents the remaining weighted average contractual life in years.

(2)Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company’s stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.

Schedule of Plans' Restricted and Performance Share Award Activity

A summary of the Plans’ restricted share activity for the three months ended March 31, 2024 and March 31, 2023 is presented below:

	Three months ended March 31, 2024			Three months ended March 31, 2023
Restricted Shares	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	746,123	$	79.60	610,155	$	73.21
Granted	305,807	98.92		242,576	89.82
Vested and issued	(219,622)	69.25		(96,649)	64.14
Forfeited or canceled	(3,154)	87.01		(1,968)	77.37
Outstanding at March 31	829,154	$	89.44	754,114	$	79.70
Vested, but deferred, at March 31	99,382	$	53.78	97,888	$	53.30

A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the three months ended March 31, 2024 and March 31, 2023 is presented below:

	Three months ended March 31, 2024			Three months ended March 31, 2023
Performance-based Stock	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	553,026	$	79.69	545,379	$	70.30
Granted	96,210	58.78		185,514	92.48
Added by performance factor at vesting	111,204	100.44		23,161	63.64
Vested and issued	(294,902)	58.69		(178,203)	63.64
Forfeited or canceled	(864)	95.40		(2,301)	78.20
Outstanding at March 31	464,674	$	93.62	573,550	$	79.24
Vested, but deferred, at March 31	21,493	$	43.71	35,852	$	44.59

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Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Components of Other Comprehensive Income or Loss

The following tables summarize the components of other comprehensive income or loss, including the related income tax effects, and the related amount reclassified to net income for the periods presented:

(In thousands)	Accumulated Unrealized (Losses) Gains on Securities		Accumulated Unrealized Gains (Losses) on Derivative Instruments		Accumulated Foreign Currency Translation Adjustments		Total Accumulated Other Comprehensive (Loss) Income
Balance at January 1, 2024	$	(350,697)	$	32,049	$	(42,583)	$	(361,231)
Other comprehensive loss during the period, net of tax, before reclassifications	(57,287)		(74,954)		(6,234)		(138,475)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	19		14,576		—		14,595
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(37)		—		—		(37)
Net other comprehensive (loss) during the period, net of tax	$	(57,305)	$	(60,378)	$	(6,234)	$	(123,917)
Balance at March 31, 2024	$	(408,002)	$	(28,329)	$	(48,817)	$	(485,148)

Balance at January 1, 2023	$	(386,057)	$	7,381	$	(48,960)	$	(427,636)
Other comprehensive income during the period, net of tax, before reclassifications	34,503		22,679		710		57,892
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(409)		2,749		—		2,340
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(32)		—		—		(32)
Net other comprehensive income during the period, net of tax	$	34,062	$	25,428	$	710	$	60,200
Balance at March 31, 2023	$	(351,995)	$	32,809	$	(48,250)	$	(367,436)

Schedule of Other Comprehensive Income Reclassified from AOCI

(In thousands)	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the
Details Regarding the Component of Accumulated Other Comprehensive Income (Loss)	Three Months Ended				Impacted Line on the Consolidated Statements of Income
	March 31,
	2024		2023
Accumulated unrealized gains on securities
Gains included in net income	$	(26)	$	560	Gains on investment securities, net
	(26)		560		Income before taxes
Tax effect	7		(151)		Income tax expense
Net of tax	$	(19)	$	409	Net income
Accumulated unrealized gains on derivative instruments
Amount reclassified to interest income on loans	$	24,475	$	9,072	Interest on Loans
Amount reclassified to interest expense on deposits	$	(4,657)	$	(5,588)	Interest on deposits
Amount reclassified to interest expense on other borrowings	—		263		Interest on other borrowings
	(19,818)		(3,747)		Income before taxes
Tax effect	5,242		998		Income tax expense
Net of tax	$	(14,576)	$	(2,749)	Net income

Schedule of Computation of Basic and Diluted Earnings Per Common Share

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended
(Dollars in thousands, except per share data)		March 31, 2024		March 31, 2023
Net income		$	187,294	$	180,198
Less: Preferred stock dividends		6,991		6,991
Net income applicable to common shares	(A)	$	180,303	$	173,207
Weighted average common shares outstanding	(B)	61,481		60,950
Effect of dilutive potential common shares
Common stock equivalents		928		873
Weighted average common shares and effect of dilutive potential common shares	(C)	62,409		61,823
Net income per common share:
Basic	(A/B)	$	2.93	$	2.84
Diluted	(A/C)	$	2.89	$	2.80

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Business Combinations (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Apr. 03, 2023	Mar. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 656,181	$ 656,672		$ 653,587
Rothschild & Co Asset Management U.S.
Business Acquisition [Line Items]
Assets acquired in acquisition			$ 12,600
Goodwill			$ 2,600

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Investment Securities - Schedule of Investment Securities (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Available-for-sale securities
Amortized Cost	$ 4,942,360,000	$ 3,979,814,000	$ 3,739,980,000
Gross Unrealized Gains	2,001,000	3,525,000	2,227,000
Gross Unrealized Losses	(556,763,000)	(480,424,000)	(482,362,000)
Fair Value	4,387,598,000	3,502,915,000	3,259,845,000
Held-to-maturity securities
Amortized Cost	3,810,344,000	3,857,263,000	3,606,854,000
Gross Unrealized Gains	697,000	3,472,000	2,352,000
Gross Unrealized Losses	(699,087,000)	(645,267,000)	(633,008,000)
Fair Value	3,111,954,000	3,215,468,000	2,976,198,000
Less: Allowance for credit losses	(329,000)	(347,000)	(463,000)
Held-to-maturity securities, net of allowance for credit losses	3,810,015,000	3,856,916,000	3,606,391,000
Equity securities with readily determinable fair value
Amortized Cost	123,421,000	143,312,000	116,296,000
Gross Unrealized Gains	4,480,000	3,500,000	3,065,000
Gross Unrealized Losses	(8,124,000)	(7,544,000)	(7,418,000)
Fair Value	119,777,000	139,268,000	111,943,000
U.S. Treasury
Available-for-sale securities
Amortized Cost	61,185,000	6,960,000	4,947,000
Gross Unrealized Gains	0	8,000	1,000
Gross Unrealized Losses	(10,000)	0	0
Fair Value	61,175,000	6,968,000	4,948,000
U.S. government agencies
Available-for-sale securities
Amortized Cost	50,000,000	50,000,000	80,000,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(4,285,000)	(4,876,000)	(5,138,000)
Fair Value	45,715,000	45,124,000	74,862,000
Held-to-maturity securities
Amortized Cost	336,463,000	336,468,000	339,608,000
Gross Unrealized Gains	0	0	24,000
Gross Unrealized Losses	(69,998,000)	(67,058,000)	(70,064,000)
Fair Value	266,465,000	269,410,000	269,568,000
Municipal
Available-for-sale securities
Amortized Cost	144,752,000	144,299,000	164,110,000
Gross Unrealized Gains	569,000	657,000	439,000
Gross Unrealized Losses	(4,731,000)	(3,998,000)	(4,163,000)
Fair Value	140,590,000	140,958,000	160,386,000
Held-to-maturity securities
Amortized Cost	168,490,000	172,933,000	174,720,000
Gross Unrealized Gains	258,000	565,000	1,117,000
Gross Unrealized Losses	(4,709,000)	(3,778,000)	(2,880,000)
Fair Value	164,039,000	169,720,000	172,957,000
Corporate notes
Held-to-maturity securities
Amortized Cost	57,372,000	57,544,000	58,061,000
Gross Unrealized Gains	8,000	7,000	14,000
Gross Unrealized Losses	(3,358,000)	(3,480,000)	(4,218,000)
Fair Value	54,022,000	54,071,000	53,857,000
Financial issuers
Available-for-sale securities
Amortized Cost	83,996,000	83,996,000	93,995,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(8,264,000)	(8,456,000)	(11,320,000)
Fair Value	75,732,000	75,540,000	82,675,000
Other
Available-for-sale securities
Amortized Cost	1,000,000	1,000,000	1,000,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(7,000)	(9,000)	0
Fair Value	993,000	991,000	1,000,000
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	4,396,962,000	3,505,012,000	3,300,048,000
Gross Unrealized Gains	480,000	1,392,000	1,787,000
Gross Unrealized Losses	(520,719,000)	(446,784,000)	(445,405,000)
Fair Value	3,876,723,000	3,059,620,000	2,856,430,000
Held-to-maturity securities
Amortized Cost	3,007,304,000	3,042,828,000	2,872,591,000
Gross Unrealized Gains	0	1,922,000	1,197,000
Gross Unrealized Losses	(597,758,000)	(549,265,000)	(533,415,000)
Fair Value	2,409,546,000	2,495,485,000	2,340,373,000
Commercial (multi-family) mortgage-backed securities
Available-for-sale securities
Amortized Cost	16,225,000	13,201,000
Gross Unrealized Gains	28,000	68,000
Gross Unrealized Losses	(577,000)	(289,000)
Fair Value	15,676,000	12,980,000
Held-to-maturity securities
Amortized Cost	6,401,000	6,415,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(281,000)	(184,000)
Fair Value	6,120,000	6,231,000
Collateralized mortgage obligations
Available-for-sale securities
Amortized Cost	188,240,000	175,346,000	95,880,000
Gross Unrealized Gains	924,000	1,400,000	0
Gross Unrealized Losses	(18,170,000)	(16,012,000)	(16,336,000)
Fair Value	170,994,000	160,734,000	79,544,000
Held-to-maturity securities
Amortized Cost	234,314,000	241,075,000	161,874,000
Gross Unrealized Gains	431,000	978,000	0
Gross Unrealized Losses	(22,983,000)	(21,502,000)	(22,431,000)
Fair Value	211,762,000	220,551,000	139,443,000
Mortgage-backed securities, subprime
Available-for-sale securities
Fair Value	$ 0	$ 0	$ 0

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Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities without readily determinable fair value	$ 63,200
Upward adjustments of equity securities without readily determinable fair values	0	$ 0
Downward adjustments of equity securities without readily determinable fair values	0	0
Impairment of equity securities without readily determinable fair values	(2)	0
Pledged securities	$ 7,200,000	$ 5,700,000	$ 6,900,000
Number of securities by a single non-government sponsored issuer exceeding 10% of shareholders' equity | security	0

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Investment Securities - Schedule of Available-for-sale Investment Securities Portfolios (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	$ 1,707,236,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(16,975,000)
Continuous unrealized losses existing for greater than 12 months, fair value	2,540,588,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(539,788,000)
Total, fair value	4,247,824,000
Total, unrealized losses	(556,763,000)
Available-for-sale securities, at fair value	4,387,598,000	$ 3,502,915,000	$ 3,259,845,000
U.S. Treasury
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	61,175,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(10,000)
Continuous unrealized losses existing for greater than 12 months, fair value	0
Continuous unrealized losses existing for greater than 12 months, unrealized losses	0
Total, fair value	61,175,000
Total, unrealized losses	(10,000)
Available-for-sale securities, at fair value	61,175,000	6,968,000	4,948,000
U.S. government agencies
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	0
Continuous unrealized losses existing for less than 12 months, unrealized losses	0
Continuous unrealized losses existing for greater than 12 months, fair value	45,715,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(4,285,000)
Total, fair value	45,715,000
Total, unrealized losses	(4,285,000)
Available-for-sale securities, at fair value	45,715,000	45,124,000	74,862,000
Municipal
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	46,448,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(324,000)
Continuous unrealized losses existing for greater than 12 months, fair value	69,700,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(4,407,000)
Total, fair value	116,148,000
Total, unrealized losses	(4,731,000)
Available-for-sale securities, at fair value	140,590,000	140,958,000	160,386,000
Financial issuers
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	0
Continuous unrealized losses existing for less than 12 months, unrealized losses	0
Continuous unrealized losses existing for greater than 12 months, fair value	75,732,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(8,264,000)
Total, fair value	75,732,000
Total, unrealized losses	(8,264,000)
Available-for-sale securities, at fair value	75,732,000	75,540,000	82,675,000
Other
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	993,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(7,000)
Continuous unrealized losses existing for greater than 12 months, fair value	0
Continuous unrealized losses existing for greater than 12 months, unrealized losses	0
Total, fair value	993,000
Total, unrealized losses	(7,000)
Available-for-sale securities, at fair value	993,000	991,000	1,000,000
Residential mortgage-backed securities
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	1,567,822,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(15,974,000)
Continuous unrealized losses existing for greater than 12 months, fair value	2,277,921,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(504,745,000)
Total, fair value	3,845,743,000
Total, unrealized losses	(520,719,000)
Available-for-sale securities, at fair value	3,876,723,000	3,059,620,000	2,856,430,000
Commercial (multi-family) mortgage-backed securities
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	12,686,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(577,000)
Continuous unrealized losses existing for greater than 12 months, fair value	0
Continuous unrealized losses existing for greater than 12 months, unrealized losses	0
Total, fair value	12,686,000
Total, unrealized losses	(577,000)
Available-for-sale securities, at fair value	15,676,000	12,980,000
Collateralized mortgage obligations
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	18,112,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(83,000)
Continuous unrealized losses existing for greater than 12 months, fair value	71,520,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(18,087,000)
Total, fair value	89,632,000
Total, unrealized losses	(18,170,000)
Available-for-sale securities, at fair value	170,994,000	160,734,000	79,544,000
Mortgage-backed securities, subprime
Available-for-sale securities
Available-for-sale securities, at fair value	$ 0	$ 0	$ 0

XML

Investment Securities - Schedule of Gross Gains and Gross Losses Realized and Impairment on Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Realized gains on investment securities	$ 1,035	$ 605
Realized losses on investment securities	(108)	(45)
Net realized gains on investment securities	927	560
Unrealized gains on equity securities with readily determinable fair value	1,034	2,290
Unrealized losses on equity securities with readily determinable fair value	(633)	(1,452)
Net unrealized gains on equity securities with readily determinable fair value	401	838
Upward adjustments of equity securities without readily determinable fair values	0	0
Downward adjustments of equity securities without readily determinable fair values	0	0
Impairment of equity securities without readily determinable fair values	(2)	0
Gains on investment securities, net	$ 1,326	$ 1,398

XML

Investment Securities - Schedule of Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Available-for-sale securities
Due in one year or less, amortized cost	$ 107,680	$ 53,162	$ 108,880
Due in one to five years, amortized cost	130,137	132,348	131,959
Due in five to ten years, amortized cost	85,212	82,040	39,019
Due after ten years, amortized cost	17,904	18,705	64,194
Amortized Cost	4,942,360	3,979,814	3,739,980
Due in one year or less, fair value	107,285	52,945	108,429
Due in one to five years, fair value	121,417	123,985	122,172
Due in five to ten years, fair value	80,234	76,869	35,158
Due after ten years, fair value	15,269	15,782	58,112
Fair Value	4,387,598	3,502,915	3,259,845
Held-to-maturity securities
Held-to-maturity securities, due in one year or less, amortized cost	4,652	5,169	2,302
Held-to-maturity securities, due in one to five years, amortized cost	115,707	109,602	98,207
Held-to-maturity securities, due in five to ten years, amortized cost	89,538	99,700	110,967
Held-to-maturity securities, due after ten years, amortized cost	352,428	352,474	360,913
Amortized Cost	3,810,344	3,857,263	3,606,854
Less: Allowance for credit losses	(329)	(347)	(463)
Held-to-maturity securities, net of allowance for credit losses	3,810,015	3,856,916	3,606,391
Held-to-maturity securities, due in one year or less, fair value	4,616	5,142	2,300
Held-to-maturity securities, due in one to five years, fair value	111,324	105,835	93,717
Held-to-maturity securities, due in five to ten years, fair value	88,050	98,718	110,892
Held-to-maturity securities, due after ten years, fair value	280,536	283,506	289,473
Fair Value	3,111,954	3,215,468	2,976,198
Mortgage-backed
Available-for-sale securities
Mortgage-backed, without single maturity date, amortized cost	4,601,427	3,693,559	3,395,928
Mortgage-backed, without single maturity date, fair value	4,063,393	3,233,334	2,935,974
Held-to-maturity securities
Mortgage-backed, amortized cost	3,248,019	3,290,318	3,034,465
Mortgage-backed, fair value	$ 2,627,428	$ 2,722,267	$ 2,479,816

XML

Loans - Schedule of Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Loans [Line Items]
Total loans, net of unearned income	$ 43,230,706	$ 42,131,831	$ 39,565,471
Total loans, net of unearned income, percentage	100.00%	100.00%	100.00%
Commercial
Loans [Line Items]
Total loans, net of unearned income	$ 13,503,481	$ 12,832,053	$ 12,576,985
Total loans, net of unearned income, percentage	31.00%	30.00%	32.00%
Commercial real estate
Loans [Line Items]
Total loans, net of unearned income	$ 11,633,437	$ 11,344,164	$ 10,239,078
Total loans, net of unearned income, percentage	27.00%	27.00%	26.00%
Home equity
Loans [Line Items]
Total loans, net of unearned income	$ 340,349	$ 343,976	$ 337,016
Total loans, net of unearned income, percentage	1.00%	1.00%	1.00%
Residential real estate
Loans [Line Items]
Total loans, net of unearned income	$ 2,890,266	$ 2,769,666	$ 2,505,545
Total loans, net of unearned income, percentage	7.00%	7.00%	6.00%
Premium finance receivables | Premium finance receivables—property & casualty
Loans [Line Items]
Total loans, net of unearned income	$ 6,940,019	$ 6,903,529	$ 5,738,880
Total loans, net of unearned income, percentage	16.00%	16.00%	14.00%
Premium finance receivables | Premium finance receivables—life insurance
Loans [Line Items]
Total loans, net of unearned income	$ 7,872,033	$ 7,877,943	$ 8,125,802
Total loans, net of unearned income, percentage	18.00%	19.00%	21.00%
Consumer and other
Loans [Line Items]
Total loans, net of unearned income	$ 51,121	$ 60,500	$ 42,165
Total loans, net of unearned income, percentage	0.00%	0.00%	0.00%

XML

Loans - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Loans [Line Items]
Net deferred loan fees and costs and fair value accounting adjustments	$ 84.9	$ 84.2	$ 70.9
Premium finance receivables
Loans [Line Items]
Unearned income portion of premium finance receivables	$ 260.2	$ 285.4	$ 244.0

XML

Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest related to financial assets held at amortized cost	$ 307,800	$ 245,100	$ 304,500
Financial Asset, Amortized Cost, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable and other	Accrued interest receivable and other	Accrued interest receivable and other
Nonaccrual loans with no related allowance for credit losses	$ 52,800
Provision for credit losses	21,691	$ 23,070
Loan net charge-offs	21,800	5,500
Provision for credit losses	(18)	(25)
Foreclosed residential real estate properties	1,146
Commitments to lend	4,200	32,200
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for credit losses	120	153
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for credit losses	604	537
Premium finance receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for credit losses	5,703	4,607
Financing Receivable | Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded investment, foreclosure proceedings in process	$ 49,600	$ 53,400

XML

Allowance for Credit Losses - Schedule of Aging of the Company's Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 122,408	$ 118,743	$ 119,463
Loans, net of unearned income	43,230,706	42,131,831	39,565,471
Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	0	29,245
Loans, net of unearned income	143,350	150,583	196,152
Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual	31,740	38,940	47,950
Loans, net of unearned income	13,503,481	12,832,053	12,576,985
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	11,633,437	11,344,164	10,239,078
Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,627	2,205	5,404
Loans, net of unearned income	2,150,314	2,084,041	1,597,053
Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Nonaccrual	37,635	33,254	5,792
Loans, net of unearned income	9,483,123	9,260,123	8,642,025
Home equity
Financing Receivable, Past Due [Line Items]
Nonaccrual	838	1,341	1,190
Loans, net of unearned income	340,349	343,976	337,016
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,890,266	2,769,666	2,505,545
Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	17,901	15,391	11,333
Loans, net of unearned income	2,746,916	2,619,083	2,309,393
Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	32,648	27,590	18,543
Loans, net of unearned income	6,940,019	6,903,529	5,738,880
Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	0	0
Loans, net of unearned income	7,872,033	7,877,943	8,125,802
Consumer and other
Financing Receivable, Past Due [Line Items]
Nonaccrual	19	22	6
Loans, net of unearned income	51,121	60,500	42,165
Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	122,408	118,743	90,218
Loans, net of unearned income	43,087,356	41,981,248	39,369,319
90+ days and still accruing
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	76,168	77,975	47,392
90+ days and still accruing | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	50,217	57,688	36,920
90+ days and still accruing | Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	27	98	0
90+ days and still accruing | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	0	0
90+ days and still accruing | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	0	0
90+ days and still accruing | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	0	0
90+ days and still accruing | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	0	104
90+ days and still accruing | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	25,877	20,135	9,215
90+ days and still accruing | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	0	1,066
90+ days and still accruing | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	47	54	87
90+ days and still accruing | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	25,951	20,287	10,472
60-89 days past due
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	94,945	70,107	67,333
60-89 days past due | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	250	0
60-89 days past due | Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	30,248	19,488	10,755
60-89 days past due | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	818	251	4,438
60-89 days past due | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	15,895	8,264	16,101
60-89 days past due | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	212	62	116
60-89 days past due | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	2,325	74
60-89 days past due | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	15,274	23,236	14,287
60-89 days past due | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	32,482	16,206	21,552
60-89 days past due | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	16	25	10
60-89 days past due | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	94,945	69,857	67,333
30-59 days past due
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	297,976	227,976	275,958
30-59 days past due | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,047	328	1,485
30-59 days past due | Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	77,715	85,743	95,593
30-59 days past due | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	7,066	1,343	19,616
30-59 days past due | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	25,932	19,291	53,064
30-59 days past due | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,617	2,263	1,118
30-59 days past due | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	24,523	22,942	19,183
30-59 days past due | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	59,729	50,437	32,545
30-59 days past due | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	100,137	45,464	52,975
30-59 days past due | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	210	165	379
30-59 days past due | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	296,929	227,648	274,473
Current
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	42,639,209	41,637,030	39,055,325
Current | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	92,086	92,317	128,502
Current | Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	13,363,751	12,687,784	12,422,687
Current | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,140,803	2,080,242	1,567,595
Current | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	9,403,661	9,199,314	8,567,068
Current | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	337,682	340,310	334,592
Current | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,704,492	2,578,425	2,278,699
Current | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	6,806,491	6,782,131	5,664,290
Current | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	7,739,414	7,816,273	8,050,209
Current | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	50,829	60,234	41,683
Current | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	$ 42,547,123	$ 41,544,713	$ 38,926,823

XML

Allowance for Credit Losses - Schedule of Loan Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 5,931,662
2023	15,453,196
2022	5,753,969
2021	4,190,014
2020	1,949,275
Prior	5,123,622
Revolving	4,814,356
Revolving to term	14,612
Total Loans	43,230,706	$ 39,565,471	$ 42,131,831
Gross write offs
2024	99
2023	13,085
2022	2,129
2021	660
2020	1,965
Prior	5,903
Revolving	0
Revolving to term	0
Total loans	23,841	7,351
Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	972,107
2023	2,718,632
2022	2,120,317
2021	1,558,810
2020	614,272
Prior	1,273,170
Revolving	4,239,936
Revolving to term	6,237
Total Loans	13,503,481
Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2024	26,328
2023	409,567
2022	929,932
2021	421,497
2020	107,635
Prior	231,645
Revolving	23,710
Revolving to term	0
Total Loans	2,150,314
Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024	298,943
2023	1,528,529
2022	1,854,074
2021	1,419,165
2020	1,003,505
Prior	3,182,827
Revolving	189,165
Revolving to term	6,915
Total Loans	9,483,123
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	694
2021	131
2020	153
Prior	18,166
Revolving	319,745
Revolving to term	1,460
Total Loans	340,349	337,016	343,976
Gross write offs
Total loans	74	0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	148,950
2023	482,179
2022	843,794
2021	778,713
2020	222,592
Prior	414,038
Revolving	0
Revolving to term	0
Total Loans	2,890,266	2,505,545	2,769,666
Gross write offs
Total loans	38	0
Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2024	3,487,115
2023	3,439,965
2022	966
2021	10,928
2020	1,045
Prior	0
Revolving	0
Revolving to term	0
Total Loans	6,940,019
Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2024	997,609
2023	6,871,203
2022	3,221
2021	0
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	7,872,033
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	610
2023	3,121
2022	971
2021	770
2020	73
Prior	3,776
Revolving	41,800
Revolving to term	0
Total Loans	51,121	42,165	$ 60,500
Gross write offs
Total loans	107	$ 153
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	5,904,983
2023	15,277,649
2022	5,575,579
2021	3,951,250
2020	1,870,777
Prior	4,662,701
Revolving	4,548,403
Revolving to term	13,863
Total Loans	41,805,205
Pass | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	970,127
2023	2,650,822
2022	1,998,311
2021	1,433,144
2020	590,652
Prior	1,200,791
Revolving	3,979,064
Revolving to term	5,677
Total Loans	12,828,588
Pass | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2024	26,328
2023	408,651
2022	927,437
2021	369,191
2020	105,155
Prior	166,162
Revolving	23,710
Revolving to term	0
Total Loans	2,026,634
Pass | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024	298,943
2023	1,516,282
2022	1,817,069
2021	1,370,179
2020	961,542
Prior	3,011,760
Revolving	189,165
Revolving to term	6,915
Total Loans	9,171,855
Pass | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	9,518
Revolving	314,674
Revolving to term	1,271
Total Loans	325,463
Pass | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	148,886
2023	476,710
2022	828,606
2021	767,141
2020	212,312
Prior	270,800
Revolving	0
Revolving to term	0
Total Loans	2,704,455
Pass | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2024	3,462,480
2023	3,350,889
2022	0
2021	10,835
2020	1,043
Prior	0
Revolving	0
Revolving to term	0
Total Loans	6,825,247
Pass | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2024	997,609
2023	6,871,203
2022	3,221
2021	0
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	7,872,033
Pass | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	610
2023	3,092
2022	935
2021	760
2020	73
Prior	3,670
Revolving	41,790
Revolving to term	0
Total Loans	50,930
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024	25,369
2023	93,048
2022	108,104
2021	152,971
2020	31,350
Prior	128,614
Revolving	149,794
Revolving to term	510
Total Loans	689,760
Special mention | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	1,783
2023	27,372
2022	69,729
2021	86,335
2020	7,175
Prior	53,800
Revolving	145,717
Revolving to term	510
Total Loans	392,421
Special mention | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	417
2022	0
2021	17,091
2020	0
Prior	15,143
Revolving	0
Revolving to term	0
Total Loans	32,651
Special mention | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	10,190
2022	34,072
2021	46,822
2020	22,865
Prior	52,411
Revolving	0
Revolving to term	0
Total Loans	166,360
Special mention | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	223
2021	62
2020	0
Prior	1,992
Revolving	4,076
Revolving to term	0
Total Loans	6,353
Special mention | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	1,842
2022	3,945
2021	2,610
2020	1,310
Prior	5,191
Revolving	0
Revolving to term	0
Total Loans	14,898
Special mention | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2024	23,586
2023	53,219
2022	121
2021	44
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	76,970
Special mention | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	0
Special mention | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	8
2022	14
2021	7
2020	0
Prior	77
Revolving	1
Revolving to term	0
Total Loans	107
Substandard accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2024	859
2023	34,432
2022	55,152
2021	71,686
2020	37,371
Prior	154,920
Revolving	115,414
Revolving to term	149
Total Loans	469,983
Substandard accrual | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	197
2023	27,876
2022	47,624
2021	34,005
2020	14,725
Prior	11,845
Revolving	114,410
Revolving to term	50
Total Loans	250,732
Substandard accrual | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	2,495
2021	35,215
2020	2,480
Prior	49,212
Revolving	0
Revolving to term	0
Total Loans	89,402
Substandard accrual | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	1,174
2022	2,480
2021	1,972
2020	19,098
Prior	82,549
Revolving	0
Revolving to term	0
Total Loans	107,273
Substandard accrual | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	291
2021	0
2020	45
Prior	6,265
Revolving	995
Revolving to term	99
Total Loans	7,695
Substandard accrual | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	64
2023	908
2022	2,157
2021	490
2020	1,023
Prior	5,020
Revolving	0
Revolving to term	0
Total Loans	9,662
Substandard accrual | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2024	598
2023	4,460
2022	92
2021	4
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	5,154
Substandard accrual | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	0
Substandard accrual | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	14
2022	13
2021	0
2020	0
Prior	29
Revolving	9
Revolving to term	0
Total Loans	65
Substandard nonaccrual/doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2024	451
2023	45,446
2022	10,522
2021	10,188
2020	2,628
Prior	52,338
Revolving	745
Revolving to term	90
Total Loans	122,408
Substandard nonaccrual/doubtful | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	12,562
2022	4,653
2021	5,326
2020	1,720
Prior	6,734
Revolving	745
Revolving to term	0
Total Loans	31,740
Substandard nonaccrual/doubtful | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	499
2022	0
2021	0
2020	0
Prior	1,128
Revolving	0
Revolving to term	0
Total Loans	1,627
Substandard nonaccrual/doubtful | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	883
2022	453
2021	192
2020	0
Prior	36,107
Revolving	0
Revolving to term	0
Total Loans	37,635
Substandard nonaccrual/doubtful | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	180
2021	69
2020	108
Prior	391
Revolving	0
Revolving to term	90
Total Loans	838
Substandard nonaccrual/doubtful | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	98
2022	4,474
2021	4,553
2020	798
Prior	7,978
Revolving	0
Revolving to term	0
Total Loans	17,901
Substandard nonaccrual/doubtful | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2024	451
2023	31,397
2022	753
2021	45
2020	2
Prior	0
Revolving	0
Revolving to term	0
Total Loans	32,648
Substandard nonaccrual/doubtful | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	0
Substandard nonaccrual/doubtful | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	7
2022	9
2021	3
2020	0
Prior	0
Revolving	0
Revolving to term	0
Total Loans	19
Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	2,621
2022	4,612
2021	3,919
2020	7,149
Prior	125,049
Revolving	0
Revolving to term	0
Total Loans	143,350
Early buy-out loans guaranteed by U.S. government agencies | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	2,621
2022	4,612
2021	3,919
2020	7,149
Prior	125,049
Revolving	0
Revolving to term	0
Total Loans	$ 143,350

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Allowance for Credit Losses - Schedule of Held-to-Maturity Debt Securities by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	$ 3,810,344	$ 3,857,263	$ 3,606,854
Less: Allowance for credit losses	(329)	(347)	(463)
Held-to-maturity securities, net of allowance for credit losses	3,810,015	3,856,916	3,606,391
U.S. government agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	156,875
2021	147,813
2020	25,000
Prior	6,775
Amortized Cost	336,463	336,468	339,608
U.S. government agencies | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	156,875
2021	147,813
2020	25,000
Prior	6,775
Amortized Cost	336,463
U.S. government agencies | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
U.S. government agencies | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
Municipal
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	4,176
2022	1,037
2021	6,886
2020	258
Prior	156,133
Amortized Cost	168,490	$ 172,933	$ 174,720
Municipal | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	4,176
2022	1,037
2021	6,886
2020	258
Prior	156,133
Amortized Cost	168,490
Municipal | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
Municipal | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
Mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	372,240
2022	566,684
2021	2,309,095
2020	0
Prior	0
Amortized Cost	3,248,019
Mortgage-backed securities | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	372,240
2022	566,684
2021	2,309,095
2020	0
Prior	0
Amortized Cost	3,248,019
Mortgage-backed securities | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
Mortgage-backed securities | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
Corporate notes
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	14,967
2021	0
2020	6,006
Prior	36,399
Amortized Cost	57,372
Corporate notes | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	14,967
2021	0
2020	6,006
Prior	36,399
Amortized Cost	57,372
Corporate notes | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	0
Corporate notes | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2024
2023
2022
2021
2020
Prior
Amortized Cost	$ 0

XML

Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	$ 427,175	$ 427,265	$ 375,798	$ 357,448
Allowance for held-to-maturity securities losses	329	347	463
Allowance for credit losses	427,504	427,612	376,261
Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	348,612	344,235	287,972
Unfunded lending-related commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	78,563	83,030	87,826
Loans and unfunded lending-related commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	$ 427,175	$ 427,265	$ 375,798

XML

Allowance for Credit Losses - Schedule of Activity in the Allowance for Credit Losses by Loan Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	$ 427,265	$ 357,448
Other adjustments	(31)	4
Charge-offs	(23,841)	(7,351)
Recoveries	2,091	1,886
Provision for credit losses	21,691	23,070
Allowance for credit losses at period end	427,175	375,798	$ 357,448
Accounting Standards Update [Extensible Enumeration]			Accounting Standards Update 2022-02
Individually measured	15,841	12,903
Collectively measured	411,334	362,895
Loans at period end, individually evaluated for impairment	89,368	71,622
Loans at period end, collectively evaluated for impairment	42,996,973	39,286,317
Loans held-for-investment	144,365	$ 207,532
Accounting Standards Update 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Accounting Standards Update [Extensible Enumeration]		Accounting Standards Update 2022-02
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		$ 741
Allowance for credit losses at period end			$ 741
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	169,604	142,769
Other adjustments	0	0
Charge-offs	(11,215)	(2,543)
Recoveries	479	392
Provision for credit losses	7,650	8,772
Allowance for credit losses at period end	166,518	149,501	142,769
Individually measured	13,989	11,281
Collectively measured	152,529	138,220
Loans at period end, individually evaluated for impairment	31,740	47,950
Loans at period end, collectively evaluated for impairment	13,471,741	12,529,035
Loans held-for-investment	0	0
Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		111
Allowance for credit losses at period end			111
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	223,853	184,352
Other adjustments	0	0
Charge-offs	(5,469)	(5)
Recoveries	31	100
Provision for credit losses	7,637	8,977
Allowance for credit losses at period end	226,052	194,780	184,352
Individually measured	1,784	1,621
Collectively measured	224,268	193,159
Loans at period end, individually evaluated for impairment	39,262	11,196
Loans at period end, collectively evaluated for impairment	11,594,175	10,227,882
Loans held-for-investment	0	0
Commercial Real Estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		1,356
Allowance for credit losses at period end			1,356
Home  Equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	7,116	7,573
Other adjustments	0	0
Charge-offs	(74)	0
Recoveries	29	35
Provision for credit losses	120	153
Allowance for credit losses at period end	7,191	7,728	7,573
Individually measured	0	0
Collectively measured	7,191	7,728
Loans at period end, individually evaluated for impairment	838	1,190
Loans at period end, collectively evaluated for impairment	339,511	335,826
Loans held-for-investment	0	0
Home  Equity | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		(33)
Allowance for credit losses at period end			(33)
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	13,133	11,585
Other adjustments	0	0
Charge-offs	(38)	0
Recoveries	2	4
Provision for credit losses	604	537
Allowance for credit losses at period end	13,701	11,434	11,585
Individually measured	59	0
Collectively measured	13,642	11,434
Loans at period end, individually evaluated for impairment	17,509	11,280
Loans at period end, collectively evaluated for impairment	2,728,392	2,286,733
Loans held-for-investment	144,365	207,532
Residential real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		(692)
Allowance for credit losses at period end			(692)
Premium Finance Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	13,069	10,671
Other adjustments	(31)	4
Charge-offs	(6,938)	(4,650)
Recoveries	1,527	1,323
Provision for credit losses	5,703	4,607
Allowance for credit losses at period end	13,330	11,955	10,671
Individually measured	0	0
Collectively measured	13,330	11,955
Loans at period end, individually evaluated for impairment	0	0
Loans at period end, collectively evaluated for impairment	14,812,052	13,864,682
Loans held-for-investment	0	0
Premium Finance Receivables | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0
Allowance for credit losses at period end			0
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	490	498
Other adjustments	0	0
Charge-offs	(107)	(153)
Recoveries	23	32
Provision for credit losses	(23)	24
Allowance for credit losses at period end	383	400	498
Individually measured	9	1
Collectively measured	374	399
Loans at period end, individually evaluated for impairment	19	6
Loans at period end, collectively evaluated for impairment	51,102	42,159
Loans held-for-investment	$ 0	0
Consumer and other | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		$ (1)
Allowance for credit losses at period end			$ (1)

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Allowance for Credit Losses - Schedule of Modification of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 3,122	$ 40,729	$ 25,976
Percentage of Total Class of Loan	0.00%	0.10%
Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 1,929	$ 3,864
Duration of Extension of Term (months)	16 months	27 months
Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 183	$ 1,319
Reduction of  Interest Rate (bps)	2.15%	2.75%
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 883	$ 35,304
Duration of Delay in Contractual Payments (months)	16 months	17 months
Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 127	$ 242
Commercial | Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 1,629	$ 37,474	16,011
Percentage of Total Class of Loan	0.00%	0.30%
Commercial | Commercial, industrial and other | Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 1,502	$ 1,938
Duration of Extension of Term (months)	10 months	10 months
Commercial | Commercial, industrial and other | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 221
Reduction of  Interest Rate (bps)	2.19%	0.52%
Commercial | Commercial, industrial and other | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 35,265
Duration of Delay in Contractual Payments (months)	0 months	16 months
Commercial | Commercial, industrial and other | Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 127	$ 50
Commercial real estate | Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 1,176	$ 1,333	6,161
Percentage of Total Class of Loan	0.00%	0.00%
Commercial real estate | Non-construction | Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 293	$ 467
Duration of Extension of Term (months)	47 months	51 months
Commercial real estate | Non-construction | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 827
Reduction of  Interest Rate (bps)	0.00%	3.42%
Commercial real estate | Non-construction | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 883	$ 39
Duration of Delay in Contractual Payments (months)	16 months	101 months
Commercial real estate | Non-construction | Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 98	$ 203	616
Percentage of Total Class of Loan	0.00%	0.10%
Home equity | Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 98	$ 203
Duration of Extension of Term (months)	12 months	12 months
Home equity | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Reduction of  Interest Rate (bps)	0.00%	0.00%
Home equity | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Duration of Delay in Contractual Payments (months)	0 months	0 months
Home equity | Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 218	$ 1,708	612
Percentage of Total Class of Loan	0.00%	0.10%
Residential real estate | Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 35	$ 1,253
Duration of Extension of Term (months)	37 months	45 months
Residential real estate | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 183	$ 271
Reduction of  Interest Rate (bps)	2.01%	2.90%
Residential real estate | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Duration of Delay in Contractual Payments (months)	0 months	0 months
Residential real estate | Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 184
Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 1	$ 11	$ 81
Percentage of Total Class of Loan	0.00%	0.00%
Premium finance receivables | Property and casualty insurance loans | Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 1	$ 3
Duration of Extension of Term (months)	0 months	0 months
Premium finance receivables | Property and casualty insurance loans | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Reduction of  Interest Rate (bps)	0.00%	0.50%
Premium finance receivables | Property and casualty insurance loans | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 0
Duration of Delay in Contractual Payments (months)	0 months	0 months
Premium finance receivables | Property and casualty insurance loans | Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 8

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Allowance for Credit Losses - Schedule of Loans for Borrowers Experiencing Financial Difficulties Modified (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 3,122	$ 40,729	$ 25,976
Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	883	35,304
Post-modification loan balances, payments in default	1,010	945
Commercial | Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	1,629	37,474	16,011
Commercial | Commercial, industrial and other | Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	35,265
Post-modification loan balances, payments in default	244	2
Commercial real estate | Construction and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances		0	2,495
Commercial real estate | Construction and development | Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances, payments in default	0	0
Commercial real estate | Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	1,176	1,333	6,161
Commercial real estate | Non-construction | Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	883	39
Post-modification loan balances, payments in default	603	828
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	98	203	616
Home equity | Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
Post-modification loan balances, payments in default	19	104
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	218	1,708	612
Residential real estate | Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
Post-modification loan balances, payments in default	144	0
Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	1	11	$ 81
Premium finance receivables | Property and casualty insurance loans | Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
Post-modification loan balances, payments in default	$ 0	$ 11

XML

Goodwill and Other Acquisition-Related Intangible Assets - Schedule of Goodwill Assets by Reporting Unit (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 656,672
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(491)
Ending balance	656,181
Community banking
Goodwill [Roll Forward]
Beginning balance	545,671
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	545,671
Specialty finance
Goodwill [Roll Forward]
Beginning balance	39,006
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(491)
Ending balance	38,515
Wealth management
Goodwill [Roll Forward]
Beginning balance	71,995
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 71,995

XML

Goodwill and Other Acquisition-Related Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Indefinite-lived Intangible Assets [Line Items]
Amortization of other acquisition-related intangible assets	$ 1,158	$ 1,235
Community banking | Core deposit intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets	10 years
Specialty finance
Indefinite-lived Intangible Assets [Line Items]
Goodwill decrease for foreign currency translation adjustments	$ 491
Specialty finance | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets	18 years
Wealth management | Customer list and other intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets	10 years

XML

Goodwill and Other Acquisition-Related Intangible Assets - Schedule of Amortization of Finite-Lived Acquisition-Related Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Intangibles with finite lives
Accumulated amortization	$ (67,868)	$ (66,710)	$ (62,447)
Intangibles with indefinite lives
Gross carrying amount	89,598	89,599	83,398
Total other acquisition-related intangible assets, net	21,730	22,889	20,951
Community banking
Intangibles with indefinite lives
Total other acquisition-related intangible assets, net	14,107	14,881	17,533
Community banking | Trademark
Intangibles with indefinite lives
Carrying amount	5,800	5,800	5,800
Community banking | Core deposit intangibles
Intangibles with finite lives
Gross carrying amount	55,206	55,206	55,206
Accumulated amortization	(46,899)	(46,125)	(43,473)
Net carrying amount	8,307	9,081	11,733
Specialty finance | Customer list intangibles
Intangibles with finite lives
Gross carrying amount	1,962	1,963	1,962
Accumulated amortization	(1,849)	(1,837)	(1,799)
Net carrying amount	113	126	163
Wealth management | Customer list and other intangibles
Intangibles with finite lives
Gross carrying amount	26,630	26,630	20,430
Accumulated amortization	(19,120)	(18,748)	(17,175)
Net carrying amount	$ 7,510	$ 7,882	$ 3,255

XML

Goodwill and Other Acquisition-Related Intangible Assets - Schedule of Estimated Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Actual in three months ended March 31, 2024	$ 1,158	$ 1,235
Estimated remaining in 2024	3,143
Estimated—2025	3,482
Estimated—2026	2,772
Estimated—2027	2,156
Estimated—2028	$ 1,591

XML

Mortgage Servicing Rights ("MSRs") (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value at beginning of the period	$ 192,456	$ 230,225
Additions from loans sold with servicing retained	5,379	5,107
Estimate of changes in fair value due to:
Payoffs, paydowns and repurchases	(4,386)	(3,909)
Changes in valuation inputs or assumptions	7,595	(6,953)
Fair value at end of the period	201,044	224,470
Unpaid principal balance of mortgage loans serviced for others	$ 12,051,392	$ 14,080,461

XML

Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Balance:
Non-interest-bearing	$ 9,908,183	$ 10,420,401	$ 11,236,083
NOW and interest-bearing demand deposits	5,720,947	5,797,649	5,576,558
Wealth management deposits	1,347,817	1,614,499	1,809,933
Money market	15,617,717	15,149,215	13,552,277
Savings	5,959,774	5,790,334	5,192,108
Time certificates of deposit	7,894,420	6,625,072	5,351,252
Total deposits	$ 46,448,858	$ 45,397,170	$ 42,718,211
Mix:
Non-interest-bearing	21.00%	23.00%	26.00%
NOW and interest-bearing demand deposits	12.00%	13.00%	13.00%
Wealth management deposits	3.00%	4.00%	4.00%
Money market	34.00%	33.00%	32.00%
Savings	13.00%	13.00%	12.00%
Time certificates of deposit	17.00%	14.00%	13.00%
Total deposits	100.00%	100.00%	100.00%

XML

FHLB Advances, Other Borrowings and Subordinated Notes - Schedule of FHLB Advances, Other Borrowings and Subordinated Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Debt Disclosure [Abstract]
FHLB advances	$ 2,676,751	$ 2,326,071	$ 2,316,071
Other borrowings:
Notes payable	164,153	171,282	192,666
Short-term borrowings	10,869	13,430	10,124
Secured borrowings	341,704	401,897	320,007
Other	58,682	59,204	60,751
Total other borrowings	575,408	645,813	583,548
Subordinated notes	437,965	437,866	437,493
Total FHLB advances, other borrowings and subordinated notes	$ 3,690,124	$ 3,409,750	$ 3,337,112

XML

FHLB Advances, Other Borrowings and Subordinated Notes - Narrative (Details) - USD ($)			3 Months Ended	12 Months Ended
	May 31, 2023	May 30, 2023	Mar. 31, 2024	Dec. 31, 2019	Dec. 31, 2014	Dec. 31, 2023	Mar. 31, 2023
Debt Instrument [Line Items]
Secured borrowings			$ 341,704,000			$ 401,897,000	$ 320,007,000
Outstanding subordinated notes			437,965,000			437,866,000	437,493,000
Collateral Pledged
Debt Instrument [Line Items]
Pledged financial instruments			16,600,000
Securities sold under repurchase agreements | Overnight Sweep Collateral
Debt Instrument [Line Items]
Securities sold under agreements to repurchase			10,869,000			13,400,000	10,100,000
Secured Debt
Debt Instrument [Line Items]
Secured borrowings			9,300,000			9,400,000	9,400,000
Fixed Rate Promissory Note
Debt Instrument [Line Items]
Principal amount of debt			$ 66,400,000
Stated interest rate			1.70%
Term Loan Facility
Debt Instrument [Line Items]
Amount outstanding			$ 164,200,000
Revolving Credit Facility
Debt Instrument [Line Items]
Amount outstanding			0
Receivables Purchase Agreement | Secured Debt
Debt Instrument [Line Items]
Borrowing capacity	$ 520,000,000	$ 420,000,000
Borrowing fee rate	0.825%	0.775%
Secured borrowings			$ 332,400,000			$ 392,500,000	$ 310,600,000
Receivables Purchase Agreement | Secured Debt | Canadian Commercial Paper Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.825%
4.85% subordinated notes maturing in June 2029
Debt Instrument [Line Items]
Proceeds, net of underwriting discount				$ 296,700,000
4.85% subordinated notes maturing in June 2029 | Subordinated Debt
Debt Instrument [Line Items]
Principal amount of debt				$ 300,000,000
Stated interest rate				4.85%
5.00% subordinated notes maturing in June 2024
Debt Instrument [Line Items]
Proceeds, net of underwriting discount					$ 139,100,000
5.00% subordinated notes maturing in June 2024 | Subordinated Debt
Debt Instrument [Line Items]
Principal amount of debt					$ 140,000,000
Stated interest rate					5.00%

XML

FHLB Advances, Other Borrowings and Subordinated Notes - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - Securities sold under repurchase agreements - Overnight Sweep Collateral - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financial Instruments Owned and Pledged as Collateral [Line Items]
Excess collateral	$ 5,763
Securities sold under repurchase agreements	10,869	$ 13,400	$ 10,100
Mortgage-backed securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Mortgage-backed securities	$ 16,632

XML

Junior Subordinated Debentures - Schedule of Junior Subordinated Debentures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Subordinated Borrowing [Line Items]
Junior subordinated debentures	$ 253,566	$ 253,566	$ 253,566
Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Junior subordinated debentures	$ 253,566	$ 253,600	$ 253,600
Weighted average contractual rate	7.77%
Junior Subordinated Debt | Wintrust Capital Trust III
Subordinated Borrowing [Line Items]
Common Securities	$ 774
Trust  Preferred Securities	25,000
Junior subordinated debentures	$ 25,774
Rate structure, stated	0.26161%
Weighted average contractual rate	8.83%
Junior Subordinated Debt | Wintrust Capital Trust III | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	3.25%
Junior Subordinated Debt | Wintrust Statutory Trust IV
Subordinated Borrowing [Line Items]
Common Securities	$ 619
Trust  Preferred Securities	20,000
Junior subordinated debentures	$ 20,619
Rate structure, stated	0.26161%
Weighted average contractual rate	8.36%
Junior Subordinated Debt | Wintrust Statutory Trust IV | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	2.80%
Junior Subordinated Debt | Wintrust Statutory Trust V
Subordinated Borrowing [Line Items]
Common Securities	$ 1,238
Trust  Preferred Securities	40,000
Junior subordinated debentures	$ 41,238
Rate structure, stated	0.26161%
Weighted average contractual rate	8.16%
Junior Subordinated Debt | Wintrust Statutory Trust V | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	2.60%
Junior Subordinated Debt | Wintrust Capital Trust VII
Subordinated Borrowing [Line Items]
Common Securities	$ 1,550
Trust  Preferred Securities	50,000
Junior subordinated debentures	$ 51,550
Rate structure, stated	0.26161%
Weighted average contractual rate	7.54%
Junior Subordinated Debt | Wintrust Capital Trust VII | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	1.95%
Junior Subordinated Debt | Wintrust Capital Trust VIII
Subordinated Borrowing [Line Items]
Common Securities	$ 1,238
Trust  Preferred Securities	25,000
Junior subordinated debentures	$ 26,238
Rate structure, stated	0.26161%
Weighted average contractual rate	7.01%
Junior Subordinated Debt | Wintrust Capital Trust VIII | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	1.45%
Junior Subordinated Debt | Wintrust Capital Trust IX
Subordinated Borrowing [Line Items]
Common Securities	$ 1,547
Trust  Preferred Securities	50,000
Junior subordinated debentures	$ 51,547
Rate structure, stated	0.26161%
Weighted average contractual rate	7.22%
Junior Subordinated Debt | Wintrust Capital Trust IX | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	1.63%
Junior Subordinated Debt | Northview Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 186
Trust  Preferred Securities	6,000
Junior subordinated debentures	$ 6,186
Rate structure, stated	0.26161%
Weighted average contractual rate	8.57%
Junior Subordinated Debt | Northview Capital Trust I | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	3.00%
Junior Subordinated Debt | Town Bankshares Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 186
Trust  Preferred Securities	6,000
Junior subordinated debentures	$ 6,186
Rate structure, stated	0.26161%
Weighted average contractual rate	8.57%
Junior Subordinated Debt | Town Bankshares Capital Trust I | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	3.00%
Junior Subordinated Debt | First Northwest Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 155
Trust  Preferred Securities	5,000
Junior subordinated debentures	$ 5,155
Rate structure, stated	0.26161%
Weighted average contractual rate	8.56%
Junior Subordinated Debt | First Northwest Capital Trust I | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	3.00%
Junior Subordinated Debt | Suburban Illinois Capital Trust II
Subordinated Borrowing [Line Items]
Common Securities	$ 464
Trust  Preferred Securities	15,000
Junior subordinated debentures	$ 15,464
Rate structure, stated	0.26161%
Weighted average contractual rate	7.34%
Junior Subordinated Debt | Suburban Illinois Capital Trust II | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	1.75%
Junior Subordinated Debt | Community Financial Shares Statutory Trust II
Subordinated Borrowing [Line Items]
Common Securities	$ 109
Trust  Preferred Securities	3,500
Junior subordinated debentures	$ 3,609
Rate structure, stated	0.26161%
Weighted average contractual rate	7.21%
Junior Subordinated Debt | Community Financial Shares Statutory Trust II | Secured Overnight Financing Rate (SOFR)
Subordinated Borrowing [Line Items]
Rate structure, variable	1.62%

XML

Junior Subordinated Debentures - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Subordinated Borrowing [Line Items]
Junior subordinated debentures	$ 253,566	$ 253,566	$ 253,566
Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Junior subordinated debentures	$ 253,566	$ 253,600	$ 253,600
Weighted average contractual rate	7.77%

XML

Segment Information - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 segment subsidiary
Segment Reporting Information [Line Items]
Number of reportable segments	3
Number of subsidiaries | subsidiary	15
Community banking
Segment Reporting Information [Line Items]
Number of reportable segments	1

XML

Segment Information - Schedule of Operating Information for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Net interest income:
Net interest income	$ 464,194	$ 457,995
Net interest income, change in contribution	$ 6,199
Net interest income, percent change in contribution	1.00%
Provision for credit losses:
Provision for credit losses	$ 21,673	23,045
Provision for credit losses, change in contribution	$ (1,372)
Provision for credit losses, percent change in contribution	(6.00%)
Non-interest income:
Non-interest income	$ 140,580	107,769
Non-interest income, change in contribution	$ 32,811
Non-interest income, percent change in contribution	30.00%
Net revenue:
Net revenue	$ 604,774	565,764
Net revenue, change in contribution	$ 39,010
Net revenue, percent change in contribution	7.00%
Segment profit:
Segment profit	$ 187,294	180,198
Segment profit, change in contribution	$ 7,096
Segment profit, percent change in contribution	4.00%
Segment assets:
Segment assets	$ 57,576,933	52,873,511	$ 56,259,934
Segment assets, change in contribution	$ 4,703,422
Segment assets, percent change in contribution	9.00%
Community banking
Segment profit:
Segment profit	$ 120,046	134,232
Segment profit, change in contribution	$ (14,186)
Segment profit, percent change in contribution	(11.00%)
Segment assets:
Segment assets	$ 45,720,014	41,611,980
Segment assets, change in contribution	$ 4,108,034
Segment assets, percent change in contribution	10.00%
Specialty finance
Segment profit:
Segment profit	$ 42,523	36,737
Segment profit, change in contribution	$ 5,786
Segment profit, percent change in contribution	16.00%
Segment assets:
Segment assets	$ 10,713,783	9,841,044
Segment assets, change in contribution	$ 872,739
Segment assets, percent change in contribution	9.00%
Wealth management
Segment profit:
Segment profit	$ 24,725	9,229
Segment profit, change in contribution	$ 15,496
Segment profit, percent change in contribution	168.00%
Segment assets:
Segment assets	$ 1,143,136	1,420,487
Segment assets, change in contribution	$ (277,351)
Segment assets, percent change in contribution	(20.00%)
Operating Segments
Net interest income:
Net interest income	$ 453,725	449,154
Net interest income, change in contribution	$ 4,571
Net interest income, percent change in contribution	1.00%
Provision for credit losses:
Provision for credit losses	$ 21,673	23,045
Provision for credit losses, change in contribution	$ (1,372)
Provision for credit losses, percent change in contribution	(6.00%)
Non-interest income:
Non-interest income	$ 160,438	124,820
Non-interest income, change in contribution	$ 35,618
Non-interest income, percent change in contribution	29.00%
Net revenue:
Net revenue	$ 614,163	573,974
Net revenue, change in contribution	$ 40,189
Net revenue, percent change in contribution	7.00%
Operating Segments | Community banking
Net interest income:
Net interest income	$ 363,685	369,848
Net interest income, change in contribution	$ (6,163)
Net interest income, percent change in contribution	(2.00%)
Provision for credit losses:
Provision for credit losses	$ 20,392	21,099
Provision for credit losses, change in contribution	$ (707)
Provision for credit losses, percent change in contribution	(3.00%)
Non-interest income:
Non-interest income	$ 74,636	68,733
Non-interest income, change in contribution	$ 5,903
Non-interest income, percent change in contribution	9.00%
Net revenue:
Net revenue	$ 438,321	438,581
Net revenue, change in contribution	$ (260)
Net revenue, percent change in contribution	0.00%
Operating Segments | Specialty finance
Net interest income:
Net interest income	$ 82,282	70,351
Net interest income, change in contribution	$ 11,931
Net interest income, percent change in contribution	17.00%
Provision for credit losses:
Provision for credit losses	$ 1,281	1,946
Provision for credit losses, change in contribution	$ (665)
Provision for credit losses, percent change in contribution	(34.00%)
Non-interest income:
Non-interest income	$ 27,317	25,790
Non-interest income, change in contribution	$ 1,527
Non-interest income, percent change in contribution	6.00%
Net revenue:
Net revenue	$ 109,599	96,141
Net revenue, change in contribution	$ 13,458
Net revenue, percent change in contribution	14.00%
Operating Segments | Wealth management
Net interest income:
Net interest income	$ 7,758	8,955
Net interest income, change in contribution	$ (1,197)
Net interest income, percent change in contribution	(13.00%)
Provision for credit losses:
Provision for credit losses	$ 0	0
Provision for credit losses, change in contribution	$ 0
Provision for credit losses, percent change in contribution	0.00%
Non-interest income:
Non-interest income	$ 58,485	30,297
Non-interest income, change in contribution	$ 28,188
Non-interest income, percent change in contribution	93.00%
Net revenue:
Net revenue	$ 66,243	39,252
Net revenue, change in contribution	$ 26,991
Net revenue, percent change in contribution	69.00%
Intersegment Eliminations
Net interest income:
Net interest income	$ 10,469	8,841
Net interest income, change in contribution	$ 1,628
Net interest income, percent change in contribution	18.00%
Provision for credit losses:
Provision for credit losses	$ 0	0
Provision for credit losses, change in contribution	$ 0
Provision for credit losses, percent change in contribution	0.00%
Non-interest income:
Non-interest income	$ (19,858)	(17,051)
Non-interest income, change in contribution	$ (2,807)
Non-interest income, percent change in contribution	16.00%
Net revenue:
Net revenue	$ (9,389)	$ (8,210)
Net revenue, change in contribution	$ (1,179)
Net revenue, percent change in contribution	14.00%

XML

Derivative Financial Instruments - Schedule of Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Derivative [Line Items]
Derivative Assets	$ 259,264	$ 275,726	$ 274,004
Derivative Liabilities	324,364	267,255	274,432
Interest rate derivatives
Derivative [Line Items]
Derivative Assets	248,933	263,955	259,331
Derivative Liabilities	318,163	255,126	262,465
Designated as hedging instrument
Derivative [Line Items]
Derivative Assets	26,428	52,465	39,462
Derivative Liabilities	94,779	44,729	43,412
Designated as hedging instrument | Interest rate derivatives | Interest rate derivatives designated as Cash Flow Hedges
Derivative [Line Items]
Derivative Assets	12,985	40,116	25,730
Derivative Liabilities	94,758	44,456	43,412
Designated as hedging instrument | Interest rate derivatives | Interest rate derivatives designated as Fair Value Hedges
Derivative [Line Items]
Derivative Assets	13,443	12,349	13,732
Derivative Liabilities	21	273	0
Not designated as hedging instrument
Derivative [Line Items]
Derivative Assets	232,836	223,261	234,542
Derivative Liabilities	229,585	222,526	231,020
Not designated as hedging instrument | Interest rate derivatives
Derivative [Line Items]
Derivative Assets	222,505	211,490	219,869
Derivative Liabilities	223,384	210,397	219,053
Not designated as hedging instrument | Interest rate lock commitments
Derivative [Line Items]
Derivative Assets	6,212	4,511	5,356
Derivative Liabilities	21	0	67
Not designated as hedging instrument | Forward commitments to sell mortgage loans
Derivative [Line Items]
Derivative Assets	169	0	121
Derivative Liabilities	2,549	5,212	2,953
Not designated as hedging instrument | Commodity forward contracts
Derivative [Line Items]
Derivative Assets	685	888	491
Derivative Liabilities	416	609	315
Not designated as hedging instrument | Foreign exchange contracts
Derivative [Line Items]
Derivative Assets	3,265	6,372	8,705
Derivative Liabilities	$ 3,215	$ 6,308	$ 8,632

XML

Derivative Financial Instruments - Schedule of Cash Flow Hedging Instruments (Details) - Designated as hedging instrument - Cash Flow Hedging $ in Thousands	Mar. 31, 2024 USD ($)
Derivative [Line Items]
Notional Amount	$ 6,700,000
Fair Value Asset (Liability)	(81,773)
Buy 2.250% floor, sell 3.743% cap; matures September 2025
Derivative [Line Items]
Notional Amount	1,250,000
Fair Value Asset (Liability)	$ (18,054)
Derivative floor rate	0.02250
Derivative cap rate	0.03743
Buy 2.750% floor, sell 4.320% cap; matures October 2026
Derivative [Line Items]
Notional Amount	$ 500,000
Fair Value Asset (Liability)	$ (4,246)
Derivative floor rate	0.02750
Derivative cap rate	0.04320
Buy 2.000% floor, sell 3.450% cap; matures September 2027
Derivative [Line Items]
Notional Amount	$ 1,250,000
Fair Value Asset (Liability)	$ (36,414)
Derivative floor rate	0.02000
Derivative cap rate	0.03450
Fixed 3.748%; matures December 2025
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (3,420)
Derivative fixed interest rate	3.748%
Fixed 3.759%; matures December 2025
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (3,373)
Derivative fixed interest rate	3.759%
Fixed 3.680%; matures February 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (3,715)
Derivative fixed interest rate	3.68%
Fixed 4.176%; matures March 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (1,439)
Derivative fixed interest rate	4.176%
Fixed 3.915%; matures March 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (2,643)
Derivative fixed interest rate	3.915%
Fixed 4.450%; matures July 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ 410
Derivative fixed interest rate	4.45%
Fixed 3.515%, matures December 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (4,681)
Derivative fixed interest rate	3.515%
Fixed 3.512%; matures December 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (4,700)
Derivative fixed interest rate	3.512%
Fixed 3.453%; matures February 2027
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (5,086)
Derivative fixed interest rate	3.453%
Fixed 4.150%; matures July 2027
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ 199
Derivative fixed interest rate	4.15%
Fixed 3.748%; matures March 2028
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (2,483)
Derivative fixed interest rate	3.748%
Fixed 3.526%; matures March 2028
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (4,504)
Derivative fixed interest rate	3.526%
Fixed 3.993%; matures October 2029
Derivative [Line Items]
Notional Amount	$ 100,000
Fair Value Asset (Liability)	$ 1,150
Derivative fixed interest rate	3.993%
Fixed 3.993%; matures October 2029 1
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ 2,876
Derivative fixed interest rate	3.993%
Fixed $4.245%; matures November 2029
Derivative [Line Items]
Notional Amount	$ 175,000
Fair Value Asset (Liability)	$ 4,175
Derivative fixed interest rate	4.245%
Fixed $4.245%; matures November 2029 1
Derivative [Line Items]
Notional Amount	$ 175,000
Fair Value Asset (Liability)	$ 4,175
Derivative fixed interest rate	4.245%

XML

Derivative Financial Instruments - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) derivativeInstrument	Dec. 31, 2022 USD ($) derivativeInstrument	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) derivativeInstrument	Mar. 31, 2023 derivativeInstrument	Jun. 30, 2022 USD ($) derivativeInstrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest income (expense) in the next twelve months	$ (56,900,000)
Net derivative liability position, aggregate fair value	0
Interest Rate Swap Terminated
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest income (expense) in the next twelve months	13,300,000
Interest Rate Swap And Collar
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest income (expense) in the next twelve months	(70,200,000)
Mortgage banking derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 145,000,000			$ 195,000,000
Number of derivative instruments held | derivativeInstrument	5			4
Not designated as hedging instrument | Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 0
Not designated as hedging instrument | Interest rate contract, qualified borrowers
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	11,600,000,000			$ 11,400,000,000
Not designated as hedging instrument | Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	226,400,000			129,900,000
Not designated as hedging instrument | Forward commitments to sell mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	561,600,000			626,900,000
Not designated as hedging instrument | Commodity forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	8,700,000			8,400,000
Not designated as hedging instrument | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 107,100,000			$ 144,300,000
Not designated as hedging instrument | Covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held | derivativeInstrument	0			0	0
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 6,700,000,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount			$ 1,000,000,000			$ 500,000,000
Derivative term			5 years
Fair value of derivative contracts			$ 66,500,000
Number of derivative instruments held | derivativeInstrument						2
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing March 2023
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative contracts						$ 3,700,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing April 2024
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative contracts						$ 10,700,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Collar Terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		$ 64,300,000
Fair value of derivative contracts		$ 875,000
Number of derivative instruments terminated | derivativeInstrument		1
Interest rate derivatives designated as Fair Value Hedges | Designated as hedging instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 215,200,000
Number of interest rate derivatives | derivativeInstrument	13

XML

Derivative Financial Instruments - Schedule of Amounts in Accumulated Other Comprehensive Income Related to Interest Rate Swaps Designated as Cash Flow Hedges (Details) - Interest rate contract - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Unrealized gain at beginning of period	$ 43,538	$ 10,026
Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings	19,818	3,747
Amount of loss recognized in other comprehensive income or loss	(101,909)	30,919
Unrealized (loss) gain at end of period	$ (38,553)	$ 44,692

XML

Derivative Financial Instruments - Schedule of Carrying Amount of Hedged Assets/(Liabilities (Details) - Designated as Hedging Instrument - Interest rate swaps $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Interest and fees on loans
Derivative [Line Items]
Location of (Loss)/Gain Recognized in Income on Derivative	$ 10
Interest income - investment securities
Derivative [Line Items]
Location of (Loss)/Gain Recognized in Income on Derivative	0
Loans, net of unearned income
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	201,019
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	(13,487)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued	(75)
Available-for-sale debt securities
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	712
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	(19)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued	$ 0

XML

Derivative Financial Instruments - Schedule of Consolidated Statement of Income Related to Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest rate swaps and caps | Trading gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ 595	$ 800
Mortgage banking derivatives | Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	(15)	3,640
Commodity contracts | Trading gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	268	177
Foreign exchange contracts | Trading gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	8	0
Covered call options | Fees from covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	4,847	10,391
Derivative contract held as economic hedge on MSRs | Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (2,577)	$ 946

XML

Derivative Financial Instruments - Schedule of Offsetting Assets / Offsetting Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Derivative Assets
Derivative Assets	$ 259,264	$ 275,726	$ 274,004
Derivative Liabilities
Gross Amounts Recognized	324,364	267,255	274,432
Interest rate contract
Derivative Assets
Derivative Assets	248,933	263,955	259,331
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	248,933	263,955	259,331
Offsetting Derivative Positions	(109,977)	(76,514)	(55,838)
Collateral Posted	(119,572)	(144,899)	(181,884)
Net Credit Exposure	19,384	42,542	21,609
Derivative Liabilities
Gross Amounts Recognized	318,163	255,126	262,465
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	318,163	255,126	262,465
Offsetting Derivative Positions	(109,977)	(76,514)	(55,838)
Collateral Posted	0	0	0
Net Credit Exposure	$ 208,186	$ 178,612	$ 206,627

XML

Fair Values of Assets and Liabilities - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) $ / shares	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 4,387,598,000	$ 3,502,915,000	$ 3,259,845,000
Loans held-for-investment	144,365,000		207,532,000
MSRs	201,044,000	192,456,000	224,470,000	$ 230,225,000
Individually assessed loans - foreclosure probable and collateral-dependent	89,368,000		71,622,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,387,598,000	3,502,915,000	3,259,845,000
Remaining contractual principal balance outstanding, mortgage loans held-for-sale	342,700,000	291,700,000	307,300,000
Remaining contractual principal balance outstanding, mortgage loans held-for-investment	145,900,000	156,900,000	204,500,000
Non-performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale classified as nonaccrual	1,300,000	649,000	3,300,000
Mortgage loans held-for-sale classified greater than 90 days past due and still accruing	$ 33,200,000	26,600,000	41,400,000
Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life of loans	5 years 10 months 24 days
Appraisal adjustment - cost of sale | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, measurement input	0.10
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale	$ 339,884,000	292,722,000	302,493,000
Loans held-for-investment	144,371,000	155,261,000	202,143,000
MSRs	201,044,000	192,456,000	224,470,000
Derivative assets	259,264,000	275,726,000	274,004,000
Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,368,000
Other real estate owned	14,538,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,400,000
Level 3 | Portion at Other than Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	0
Level 3 | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale	33,726,000	26,835,000	44,250,000
Loans held-for-investment	49,317,000	60,670,000	69,493,000
MSRs	201,044,000	192,456,000	224,470,000
Derivative assets	$ 6,212,000	4,510,000	5,356,000
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.1099
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0660
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0660
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.1099
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.01
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Minimum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.01
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.21
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Maximum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.21
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Weighted Average | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0043
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0118
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Minimum | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Minimum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Maximum | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.12
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Maximum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.16
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.0778
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0778
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Weighted Average | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0778
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Minimum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.90
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Maximum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.90
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	77
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	70
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	200
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	394
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	200
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	1,000
Level 3 | Measured at fair value on a recurring basis: | Pull-through rate | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, measurement input	0.8211
Level 3 | Measured at fair value on a recurring basis: | Pull-through rate | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, measurement input	0.06
Level 3 | Measured at fair value on a recurring basis: | Pull-through rate | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, measurement input	1
Level 3 | Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 89,368,000
Other real estate owned	14,538,000
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	140,590,000	140,958,000	160,386,000
Municipal securities | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	140,590,000	140,958,000	160,386,000
Municipal securities | Level 3 | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 88,219,000	$ 86,237,000	$ 112,257,000

XML

Fair Values of Assets and Liabilities - Schedule of Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 4,387,598	$ 3,502,915	$ 3,259,845
Equity securities with readily determinable fair value	119,777	139,268	111,943
Loans held-for-investment	144,365		207,532
MSRs	201,044	192,456	224,470	$ 230,225
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	61,175	6,968	4,948
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	45,715	45,124	74,862
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	140,590	140,958	160,386
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	2,184	4,707	102
Equity securities with readily determinable fair value	119,777	139,268	111,943
Mortgage loans held-for-sale	339,884	292,722	302,493
Loans held-for-investment	144,371	155,261	202,143
MSRs	201,044	192,456	224,470
Nonqualified deferred compensation assets	15,953	15,238	14,379
Derivative assets	259,264	275,726	274,004
Total	5,470,075	4,578,293	4,389,379
Derivative liabilities	324,364	267,255	274,432
Measured at fair value on a recurring basis: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	0	0	0
Equity securities with readily determinable fair value	111,711	131,202	103,877
Mortgage loans held-for-sale	0	0	0
Loans held-for-investment	0	0	0
MSRs	0	0	0
Nonqualified deferred compensation assets	0	0	0
Derivative assets	0	0	0
Total	172,886	138,170	108,825
Derivative liabilities	0	0	0
Measured at fair value on a recurring basis: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	2,184	4,707	102
Equity securities with readily determinable fair value	8,066	8,066	8,066
Mortgage loans held-for-sale	306,158	265,887	258,243
Loans held-for-investment	95,054	94,591	132,650
MSRs	0	0	0
Nonqualified deferred compensation assets	15,953	15,238	14,379
Derivative assets	253,052	271,216	268,648
Total	4,918,671	4,069,415	3,824,728
Derivative liabilities	324,364	267,255	274,432
Measured at fair value on a recurring basis: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	0	0	0
Equity securities with readily determinable fair value	0	0	0
Mortgage loans held-for-sale	33,726	26,835	44,250
Loans held-for-investment	49,317	60,670	69,493
MSRs	201,044	192,456	224,470
Nonqualified deferred compensation assets	0	0	0
Derivative assets	6,212	4,510	5,356
Total	378,518	370,708	455,826
Derivative liabilities	0	0	0
Measured at fair value on a recurring basis: | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	61,175	6,968	4,948
Measured at fair value on a recurring basis: | U.S. Treasury | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	61,175	6,968	4,948
Measured at fair value on a recurring basis: | U.S. Treasury | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | U.S. Treasury | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	45,715	45,124	74,862
Measured at fair value on a recurring basis: | U.S. government agencies | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | U.S. government agencies | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	45,715	45,124	74,862
Measured at fair value on a recurring basis: | U.S. government agencies | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Mortgage loans held-for-sale	33,726
Measured at fair value on a recurring basis: | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	140,590	140,958	160,386
Measured at fair value on a recurring basis: | Municipal securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | Municipal securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	52,371	54,721	48,129
Measured at fair value on a recurring basis: | Municipal securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	88,219	86,237	112,257
Measured at fair value on a recurring basis: | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	76,725	76,531	83,675
Measured at fair value on a recurring basis: | Corporate notes | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | Corporate notes | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	76,725	76,531	83,675
Measured at fair value on a recurring basis: | Corporate notes | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | Mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,063,393	3,233,334	2,935,974
Measured at fair value on a recurring basis: | Mortgage-backed | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Measured at fair value on a recurring basis: | Mortgage-backed | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,063,393	3,233,334	2,935,974
Measured at fair value on a recurring basis: | Mortgage-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0	$ 0	$ 0

XML

Fair Values of Assets and Liabilities - Schedule of Changes In Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Municipal
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 86,237	$ 117,537
Net income	0	0
Other comprehensive income or loss	(1,988)	(1,662)
Purchases	8,384	4,418
Settlements	(4,414)	(8,036)
Net transfers into Level 3	0	0
Ending balance	88,219	112,257
Mortgage loans held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	26,835	48,655
Net income	67	466
Other comprehensive income or loss	0	0
Purchases	0	0
Settlements	(10,340)	(18,619)
Net transfers into Level 3	17,164	13,748
Ending balance	33,726	44,250
Loans held-for- investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	60,670	84,165
Net income	(317)	364
Other comprehensive income or loss	0	0
Purchases	0	0
Settlements	(15,803)	(20,322)
Net transfers into Level 3	4,767	5,286
Ending balance	49,317	69,493
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	192,456	230,225
Net income	8,588	(5,755)
Other comprehensive income or loss	0	0
Purchases	0	0
Settlements	0	0
Net transfers into Level 3	0	0
Ending balance	201,044	224,470
Derivative assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	4,510	1,711
Net income	1,702	3,645
Other comprehensive income or loss	0	0
Purchases	0	0
Settlements	0	0
Net transfers into Level 3	0	0
Ending balance	$ 6,212	$ 5,356

XML

Fair Values of Assets and Liabilities - Schedule of Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 89,368	$ 71,622
Fair value losses - individually assessed loans - foreclosure probable and collateral-dependent	16,726
Fair value losses - other real estate owned	207
Fair value losses	16,933
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,400
Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,368
Other real estate owned	14,538
Total	103,906
Measured at fair value on a non-recurring basis: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	0
Other real estate owned	0
Total	0
Measured at fair value on a non-recurring basis: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	0
Other real estate owned	0
Total	0
Measured at fair value on a non-recurring basis: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,368
Other real estate owned	14,538
Total	$ 103,906

XML

Fair Values of Assets and Liabilities - Schedule of Valuation Techniques and Significant Unobservable Inputs Used to Measure Both Recurring and Non Recurring (Details)	Mar. 31, 2024 USD ($) $ / shares year	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	$ 4,387,598,000	$ 3,502,915,000	$ 3,259,845,000
Loans held-for-investment	144,365,000		207,532,000
MSRs	201,044,000	192,456,000	224,470,000	$ 230,225,000
Individually assessed loans - foreclosure probable and collateral-dependent	89,368,000		71,622,000
Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	140,590,000	140,958,000	160,386,000
U.S. government agencies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	45,715,000	45,124,000	74,862,000
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,400,000
Measured at fair value on a recurring basis:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale	339,884,000	292,722,000	302,493,000
Loans held-for-investment	144,371,000	155,261,000	202,143,000
MSRs	201,044,000	192,456,000	224,470,000
Derivative assets	259,264,000	275,726,000	274,004,000
Measured at fair value on a recurring basis: | Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	140,590,000	140,958,000	160,386,000
Measured at fair value on a recurring basis: | U.S. government agencies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	45,715,000	45,124,000	74,862,000
Measured at fair value on a recurring basis: | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale	33,726,000	26,835,000	44,250,000
Loans held-for-investment	49,317,000	60,670,000	69,493,000
MSRs	201,044,000	192,456,000	224,470,000
Derivative assets	6,212,000	4,510,000	5,356,000
Measured at fair value on a recurring basis: | Level 3 | Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	88,219,000	86,237,000	112,257,000
Measured at fair value on a recurring basis: | Level 3 | U.S. government agencies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	0	$ 0	$ 0
Mortgage loans held-for-sale	$ 33,726,000
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.0660
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0660
MSRs, measurement input	0.01
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0663
MSRs, measurement input	0.21
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.0660
Loans held-for-investment, measurement input	0.0660
MSRs, measurement input	0.1099
Measured at fair value on a recurring basis: | Credit discount | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0
Loans held-for-investment, measurement input	0
Measured at fair value on a recurring basis: | Credit discount | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.12
Loans held-for-investment, measurement input	0.16
Measured at fair value on a recurring basis: | Credit discount | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.0043
Loans held-for-investment, measurement input	0.0118
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0778
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	0
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	0.90
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0778
MSRs, measurement input	0.0778
Measured at fair value on a recurring basis: | Average life - delinquent loans (in years) | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input | year	1.1
Measured at fair value on a recurring basis: | Average life - delinquent loans (in years) | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input | year	10.6
Measured at fair value on a recurring basis: | Average life - delinquent loans (in years) | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input | year	5.9
Measured at fair value on a recurring basis: | Cost of servicing | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	70
Measured at fair value on a recurring basis: | Cost of servicing | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	200
Measured at fair value on a recurring basis: | Cost of servicing | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	77
Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	200
Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	1,000
Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	394
Measured at fair value on a recurring basis: | Pull-through rate | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivatives, measurement input	0.06
Measured at fair value on a recurring basis: | Pull-through rate | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivatives, measurement input	1
Measured at fair value on a recurring basis: | Pull-through rate | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivatives, measurement input	0.8211
Measured at fair value on a non-recurring basis:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 89,368,000
Other real estate owned	14,538,000
Measured at fair value on a non-recurring basis: | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	89,368,000
Other real estate owned	$ 14,538,000
Measured at fair value on a non-recurring basis: | Appraisal adjustment - cost of sale | Level 3 | Appraisal value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans - collateral based, measurement input	0.10
Other real estate owned, measurement input	0.10
Measured at fair value on a non-recurring basis: | Appraisal adjustment - cost of sale | Level 3 | Appraisal value | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans - collateral based, measurement input	0.1000
Other real estate owned, measurement input	0.1000

XML

Fair Values of Assets and Liabilities - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financial Assets:
Interest-bearing deposits with banks	$ 2,131,077	$ 2,084,323	$ 1,563,578
Available-for-sale securities	4,387,598	3,502,915	3,259,845
Held-to-maturity securities	3,111,954	3,215,468	2,976,198
Equity securities with readily determinable fair value	119,777	139,268	111,943
FHLB and FRB stock, at cost	224,657	205,003	244,957
Brokerage customer receivables	13,382	10,592	16,042
Mortgage loans held-for-sale, at fair value	339,884	292,722	302,493
Accrued interest receivable and other	1,580,142	1,551,899	1,413,795
Financial Liabilities
FHLB advances	2,676,751	2,326,071	2,316,071
Other borrowings	575,408	645,813	583,548
Subordinated notes	437,965	437,866	437,493
Junior subordinated debentures	253,566	253,566	253,566
Carrying Value
Financial Assets:
Cash and cash equivalents	379,886	423,464	445,986
Interest-bearing deposits with banks	2,131,077	2,084,323	1,563,578
Available-for-sale securities	4,387,598	3,502,915	3,259,845
Held-to-maturity securities	3,810,015	3,856,916	3,606,391
Trading account securities	2,184	4,707	102
Equity securities with readily determinable fair value	119,777	139,268	111,943
FHLB and FRB stock, at cost	224,657	205,003	244,957
Brokerage customer receivables	13,382	10,592	16,042
Mortgage loans held-for-sale, at fair value	339,884	292,722	302,493
Nonqualified deferred compensation assets	15,953	15,238	14,379
Derivative assets	259,264	275,726	274,004
Accrued interest receivable and other	487,933	477,832	417,066
Total	55,402,316	53,420,537	49,822,257
Financial Liabilities
Non-maturity deposits	38,554,438	38,772,098	37,366,959
Time certificates of deposit	7,894,420	6,625,072	5,351,252
FHLB advances	2,676,751	2,326,071	2,316,071
Other borrowings	575,408	645,813	583,548
Subordinated notes	437,965	437,866	437,493
Junior subordinated debentures	253,566	253,566	253,566
Derivative liabilities	324,364	267,255	274,432
Accrued interest payable	64,943	51,116	42,015
Total financial liabilities	50,781,855	49,378,857	46,625,336
Carrying Value | Loans held-for-investment, at fair value
Financial Assets:
Loans held-for-investment	144,371	155,261	202,143
Carrying Value | Loans held-for-investment, at amortized cost
Financial Assets:
Loans held-for-investment	43,086,335	41,976,570	39,363,328
Fair Value
Financial Assets:
Cash and cash equivalents	379,886	423,464	445,986
Interest-bearing deposits with banks	2,131,077	2,084,323	1,563,578
Available-for-sale securities	4,387,598	3,502,915	3,259,845
Held-to-maturity securities	3,111,954	3,215,468	2,976,198
Trading account securities	2,184	4,707	102
Equity securities with readily determinable fair value	119,777	139,268	111,943
FHLB and FRB stock, at cost	224,657	205,003	244,957
Brokerage customer receivables	13,382	10,592	16,042
Mortgage loans held-for-sale, at fair value	339,884	292,722	302,493
Nonqualified deferred compensation assets	15,953	15,238	14,379
Derivative assets	259,264	275,726	274,004
Accrued interest receivable and other	487,933	477,832	417,066
Total	53,686,539	51,892,529	48,406,497
Financial Liabilities
Non-maturity deposits	38,554,438	38,772,098	37,366,959
Time certificates of deposit	7,872,870	6,603,746	4,970,556
FHLB advances	2,669,780	2,367,107	2,255,580
Other borrowings	573,752	643,755	555,615
Subordinated notes	413,003	413,501	410,827
Junior subordinated debentures	253,574	253,579	252,663
Derivative liabilities	324,364	267,255	274,432
Accrued interest payable	64,943	51,116	42,015
Total financial liabilities	50,726,724	49,372,157	46,128,647
Fair Value | Loans held-for-investment, at fair value
Financial Assets:
Loans held-for-investment	144,371	155,261	202,143
Fair Value | Loans held-for-investment, at amortized cost
Financial Assets:
Loans held-for-investment	$ 42,068,619	$ 41,090,010	$ 38,577,761

XML

Stock-Based Compensation Plans (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Shares available for future grants (in shares)	737
Stock-based compensation expense	$ 9,200	$ 8,300
Aggregate intrinsic value of options exercised	50	2,500
Cash received from option exercises	$ 25	$ 2,200

XML

Stock-Based Compensation Plans - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Common Shares
Outstanding at beginning of the period (in shares)	13,100	68,093
Granted (in shares)	0	0
Exercised (in shares)	(775)	(54,218)
Forfeited or canceled (in shares)	0	0
Outstanding at end of the period (in shares)	12,325	13,875
Exercisable (in shares)	12,325	13,875
Weighted Average Strike Price
Outstanding at beginning of period (usd per share)	$ 42.76	$ 41.14
Granted (usd per share)	0	0
Exercised (usd per share)	32.26	40.87
Forfeited or canceled (usd per share)	0	0
Outstanding at end of period (usd per share)	43.42	42.18
Exercisable (usd per share)	$ 43.42	$ 42.18
Stock Options Additional Disclosures
Remaining contractual term, outstanding	4 years 2 months 12 days	4 years 8 months 12 days
Remaining contractual term, exercisable	4 years 2 months 12 days	4 years 8 months 12 days
Intrinsic value, outstanding	$ 751	$ 427
Intrinsic value, exercisable	$ 751	$ 427

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Stock-Based Compensation Plans - Schedule of Plans' Restricted and Performance Share Award Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restricted shares
Common Shares
Outstanding, beginning of the period (in shares)	746,123	610,155
Granted (in shares)	305,807	242,576
Vested and issued (in shares)	(219,622)	(96,649)
Expired, canceled or forfeited (in shares)	(3,154)	(1,968)
Outstanding, end of the period (in shares)	829,154	754,114
Vested, but deferred (in shares)	99,382	97,888
Weighted Average Grant-Date Fair Value
Outstanding, beginning of period (usd per share)	$ 79.60	$ 73.21
Granted (usd per share)	98.92	89.82
Vested and issued (usd per share)	69.25	64.14
Canceled or forfeited (usd per share)	87.01	77.37
Outstanding, end of period (usd per share)	89.44	79.70
Vested, but deferred (usd per share)	$ 53.78	$ 53.30
Performance-based stock
Common Shares
Outstanding, beginning of the period (in shares)	553,026	545,379
Granted (in shares)	96,210	185,514
Added by performance factor at vesting (in shares)	111,204	23,161
Vested and issued (in shares)	(294,902)	(178,203)
Expired, canceled or forfeited (in shares)	(864)	(2,301)
Outstanding, end of the period (in shares)	464,674	573,550
Vested, but deferred (in shares)	21,493	35,852
Weighted Average Grant-Date Fair Value
Outstanding, beginning of period (usd per share)	$ 79.69	$ 70.30
Granted (usd per share)	58.78	92.48
Added by performance factor at vesting (usd per share)	100.44	63.64
Vested and issued (usd per share)	58.69	63.64
Canceled or forfeited (usd per share)	95.40	78.20
Outstanding, end of period (usd per share)	93.62	79.24
Vested, but deferred (usd per share)	$ 43.71	$ 44.59

XML

Accumulated Other Comprehensive Income or Loss and Earnings Per Share - Schedule of Components of Other Comprehensive Income or Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 5,399,526	$ 4,796,838
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(138,475)	57,892
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	14,595	2,340
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(37)	(32)
Net other comprehensive income (loss) during the period, net of tax	(123,917)	60,200
Ending balance	5,436,400	5,015,506
Accumulated Unrealized (Losses) Gains on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(350,697)	(386,057)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(57,287)	34,503
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	19	(409)
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(37)	(32)
Net other comprehensive income (loss) during the period, net of tax	(57,305)	34,062
Ending balance	(408,002)	(351,995)
Accumulated Unrealized Gains (Losses) on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	32,049	7,381
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(74,954)	22,679
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	14,576	2,749
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0
Net other comprehensive income (loss) during the period, net of tax	(60,378)	25,428
Ending balance	(28,329)	32,809
Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(42,583)	(48,960)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(6,234)	710
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	0	0
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0
Net other comprehensive income (loss) during the period, net of tax	(6,234)	710
Ending balance	(48,817)	(48,250)
Accumulated other comprehensive income (loss)
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(361,231)	(427,636)
Ending balance	$ (485,148)	$ (367,436)

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Accumulated Other Comprehensive Income or Loss and Earnings Per Share - Schedule of Other Comprehensive Income Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains on investment securities, net	$ 1,326	$ 1,398
Income before taxes	249,956	243,550
Income tax expense	(62,662)	(63,352)
Interest on Loans	710,341	558,692
Interest on deposits	299,532	144,802
Interest on other borrowings	9,248	7,854
Net income	187,294	180,198
Reclassification Out of Accumulated Other Comprehensive Income | Accumulated unrealized gains on securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains on investment securities, net	(26)	560
Income before taxes	(26)	560
Income tax expense	7	(151)
Net income	(19)	409
Reclassification Out of Accumulated Other Comprehensive Income | Accumulated unrealized gains on derivative instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes	(19,818)	(3,747)
Income tax expense	5,242	998
Interest on Loans	24,475	9,072
Interest on deposits	(4,657)	(5,588)
Interest on other borrowings	0	263
Net income	$ (14,576)	$ (2,749)

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Accumulated Other Comprehensive Income or Loss and Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Equity [Abstract]
Net income	$ 187,294	$ 180,198
Less: Preferred stock dividends	6,991	6,991
Net income applicable to common shares	$ 180,303	$ 173,207
Weighted average common shares outstanding (in shares)	61,481	60,950
Effect of dilutive potential common shares
Common stock equivalents (in shares)	928	873
Average common shares and dilutive common shares (in shares)	62,409	61,823
Net income per common share:
Basic (usd per share)	$ 2.93	$ 2.84
Diluted (usd per share)	$ 2.89	$ 2.80

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Accumulated Other Comprehensive Income or Loss and Earnings Per Share - Narrative (Details) - $ / shares	1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2024	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2024
Class of Stock [Line Items]
Cash dividends declared per common share (usd per share)	$ 0.45	$ 0.45	$ 0.40
Forecast
Class of Stock [Line Items]
Cash dividends declared per common share (usd per share)				$ 1.80