Wintrust Financial (WTFC) 10-Q8 Aug 232023 Q2 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2023	Jul. 31, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
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)		61,212,017
Entity Central Index Key	0001015328
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
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

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Assets
Cash and due from banks	$ 513,858	$ 490,908	$ 498,891
Federal funds sold and securities purchased under resale agreements	59	58	475,056
Interest-bearing deposits with banks	2,163,708	1,988,719	3,266,541
Available-for-sale securities	3,492,481	3,243,017	2,970,121
Held-to-maturity securities, at amortized cost, net of allowance for credit losses of $406, $488 and $83 at June 30, 2023, December 31, 2022 and June 30, 2022, respectively ($2.9 billion, $2.9 billion and $2.9 billion fair value at June 30, 2023, December 31, 2022 and June 30, 2022, respectively)	3,564,473	3,640,567	3,413,469
Trading account securities	3,027	1,127	1,010
Equity securities with readily determinable fair value	116,275	110,365	93,295
Federal Home Loan Bank and Federal Reserve Bank stock	195,117	224,759	136,138
Brokerage customer receivables	15,722	16,387	21,527
Mortgage loans held-for-sale, at fair value	338,728	299,935	513,232
Loans, net of unearned income	41,023,408	39,196,485	37,053,103
Allowance for loan losses	(387,380)	(357,448)	(312,109)
Premises, software and equipment, net	749,393	764,798	762,381
Lease investments, net	274,351	253,928	223,813
Accrued interest receivable and other assets	1,455,748	1,391,342	1,112,697
Trade date securities receivable	0	921,717	0
Goodwill	656,674	653,524	654,709
Other acquisition-related intangible assets	25,653	22,186	25,118
Total assets	54,286,176	52,949,649	50,969,332
Deposits:
Non-interest-bearing	10,604,915	12,668,160	13,855,844
Interest-bearing	33,433,792	30,234,384	28,737,482
Total deposits	44,038,707	42,902,544	42,593,326
Federal Home Loan Bank advances	2,026,071	2,316,071	1,166,071
Other borrowings	665,219	596,614	482,787
Subordinated notes	437,628	437,392	437,162
Junior subordinated debentures	253,566	253,566	253,566
Accrued interest payable and other liabilities	1,823,073	1,646,624	1,308,797
Total liabilities	49,244,264	48,152,811	46,241,709
Shareholders’ Equity:
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at June 30, 2023, December 31, 2022 and June 30, 2022; 61,219,240 shares issued at June 30, 2023, 60,797,270 shares issued at December 31, 2022 and 60,721,889 shares issued at June 30, 2022	61,219	60,797	60,722
Surplus	1,923,623	1,902,474	1,880,913
Treasury stock, at cost, 21,564 shares at June 30, 2023, 3,262 shares at December 31, 2022, and no shares at June 30, 2022	(1,966)	(304)	0
Retained earnings	3,120,626	2,849,007	2,616,525
Accumulated other comprehensive loss	(474,090)	(427,636)	(243,037)
Total shareholders’ equity	5,041,912	4,796,838	4,727,623
Total liabilities and shareholders’ equity	54,286,176	52,949,649	50,969,332
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at June 30, 2023, December 31, 2022 and June 30, 2022
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 June 30, 2023, December 31, 2022 and June 30, 2022
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	41,023,408	39,196,485	37,053,103
Allowance for loan losses	(302,499)	(270,173)	(251,769)
Net loans	$ 40,720,909	$ 38,926,312	$ 36,801,334

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Held-to-maturity securities, allowance for credit loss	$ 406	$ 488	$ 83
Held-to-maturity securities, fair value	$ 2,887,891	$ 2,949,821	$ 2,900,269
Preferred stock, authorized (in shares)	20,000,000	20,000,000	20,000,000
Common stock, stated value (usd per share)	$ 1	$ 1	$ 1
Common stock, authorized (in shares)	100,000,000	100,000,000	100,000,000
Common stock, issued (in shares)	61,219,240	60,797,270	60,721,889
Treasury stock (in shares)	21,564	3,262	0
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

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest income
Interest and fees on loans	$ 621,057	$ 320,501	$ 1,179,749	$ 606,199
Mortgage loans held-for-sale	4,178	5,740	7,706	11,827
Interest-bearing deposits with banks	16,882	5,790	30,350	7,477
Federal funds sold and securities purchased under resale agreements	1	1,364	71	1,795
Investment securities	51,243	36,541	111,186	68,939
Trading account securities	6	4	20	9
Federal Home Loan Bank and Federal Reserve Bank stock	3,544	1,823	7,224	3,595
Brokerage customer receivables	265	205	560	379
Total interest income	697,176	371,968	1,336,866	700,220
Interest expense
Interest on deposits	213,495	18,985	358,297	33,839
Interest on Federal Home Loan Bank advances	17,399	4,878	36,534	9,694
Interest on other borrowings	8,485	2,734	16,339	4,973
Interest on subordinated notes	5,523	5,517	11,011	10,999
Interest on junior subordinated debentures	4,737	2,050	9,153	3,617
Total interest expense	249,639	34,164	431,334	63,122
Net interest income	447,537	337,804	905,532	637,098
Provision for credit losses	28,514	20,417	51,559	24,523
Net interest income after provision for credit losses	419,023	317,387	853,973	612,575
Non-interest income
Mortgage banking	29,981	33,314	48,245	110,545
Gains (losses) on investment securities, net	0	(7,797)	1,398	(10,579)
Fees from covered call options	2,578	1,069	12,969	4,811
Trading gains, net	106	176	919	4,065
Operating lease income, net	12,227	15,007	25,273	30,482
Other	20,672	13,916	41,681	32,474
Total non-interest income	113,030	102,942	220,799	265,732
Non-interest expense
Salaries and employee benefits	184,923	167,326	361,704	339,681
Software and equipment	26,205	24,250	50,902	47,060
Operating lease equipment	9,816	8,774	19,649	18,482
Occupancy, net	19,176	17,651	37,662	35,475
Data processing	9,726	8,010	19,135	15,515
Advertising and marketing	17,794	16,615	29,740	28,539
Professional fees	8,940	7,876	17,103	16,277
Amortization of other acquisition-related intangible assets	1,499	1,579	2,734	3,188
FDIC insurance	9,008	6,949	17,677	14,678
Other real estate owned expense, net	118	294	(89)	(738)
Other	33,418	29,344	63,575	54,809
Total non-interest expense	320,623	288,668	619,792	572,966
Income before taxes	211,430	131,661	454,980	305,341
Income tax expense	56,680	37,148	120,032	83,437
Net income	154,750	94,513	334,948	221,904
Preferred stock dividends	6,991	6,991	13,982	13,982
Net income applicable to common shares	$ 147,759	$ 87,522	$ 320,966	$ 207,922
Net income per common share-Basic (usd per share)	$ 2.41	$ 1.51	$ 5.26	$ 3.61
Net income per common share-Diluted (usd per share)	2.38	1.49	5.18	3.56
Cash dividends declared per common share (usd per share)	$ 0.40	$ 0.34	$ 0.80	$ 0.68
Weighted average common shares outstanding (in shares)	61,192	58,063	61,072	57,632
Dilutive potential common shares (in shares)	902	775	933	823
Average common shares and dilutive common shares (in shares)	62,094	58,838	62,005	58,455
Wealth management
Non-interest income
Revenue from contracts with customers	$ 33,858	$ 31,369	$ 63,803	$ 62,763
Service charges on deposit accounts
Non-interest income
Revenue from contracts with customers	$ 13,608	$ 15,888	$ 26,511	$ 31,171

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 154,750	$ 94,513	$ 334,948	$ 221,904
Unrealized (losses) gains on available-for-sale securities
Before tax	(46,231)	(166,536)	809	(372,553)
Tax effect	12,322	44,382	(215)	99,285
Net of tax	(33,909)	(122,154)	594	(273,268)
Reclassification of net gains on available-for-sale securities included in net income
Before tax	2	0	562	250
Tax effect	(1)	0	(152)	(67)
Net of tax	1	0	410	183
Reclassification of amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale
Before tax	28	44	71	86
Tax effect	(8)	(12)	(19)	(23)
Net of tax	20	32	52	63
Net unrealized (losses) gains on available-for-sale securities	(33,930)	(122,186)	132	(273,514)
Unrealized (losses) gains on derivative instruments
Before tax	(106,431)	2,375	(71,765)	41,856
Tax effect	28,363	(634)	19,125	(11,166)
Net unrealized (losses) gains on derivative instruments	(78,068)	1,741	(52,640)	30,690
Foreign currency adjustment
Before tax	6,527	(8,260)	7,417	(5,418)
Tax effect	(1,183)	1,667	(1,363)	1,113
Net foreign currency adjustment	5,344	(6,593)	6,054	(4,305)
Total other comprehensive (loss)	(106,654)	(127,038)	(46,454)	(247,129)
Comprehensive income (loss)	$ 48,096	$ (32,525)	$ 288,494	$ (25,225)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Series E Preferred Stock	Preferred stock	Preferred stock Series E Preferred Stock	Common stock	Surplus	Surplus Series E Preferred Stock	Treasury stock	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2021	$ 4,498,688			$ 412,500		$ 58,892	$ 1,685,572		$ (109,903)	$ 2,447,535		$ 4,092
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	221,904									221,904
Other comprehensive loss, net of tax	(247,129)											(247,129)
Cash dividends declared on common stock	(38,932)									(38,932)
Dividends on Series D and E preferred stock	(13,982)									(13,982)
Common stock repurchases under authorized program	0								0
Stock-based compensation	14,889						14,889
Issuance of Series E preferred stock (in shares)					0
Issuance of Series E preferred stock			$ 0					$ 0
Common stock issued for:
Acquisitions	285,721					1,612	174,206		109,903
New issuance, net of cost			0					0
Exercise of stock options and warrants	3,540					84	3,456
Restricted stock awards	0					56	(56)
Employee stock purchase plan	1,635					19	1,616
Director compensation plan	1,289					59	1,230
Ending balance at Jun. 30, 2022	4,727,623			412,500		60,722	1,880,913		0	2,616,525		(243,037)
Beginning balance at Dec. 31, 2021	4,498,688			412,500		58,892	1,685,572		(109,903)	2,447,535		4,092
Ending balance at Dec. 31, 2022	$ 4,796,838	$ (544)		412,500		60,797	1,902,474		(304)	2,849,007	$ (544)	(427,636)
Common stock issued for:
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2022-02 [Member]
Beginning balance at Mar. 31, 2022	$ 4,492,256			412,500		59,091	1,698,093		(109,903)	2,548,474		(115,999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	94,513									94,513
Other comprehensive loss, net of tax	(127,038)											(127,038)
Cash dividends declared on common stock	(19,471)									(19,471)
Dividends on Series D and E preferred stock	(6,991)									(6,991)
Stock-based compensation	6,998						6,998
Issuance of Series E preferred stock (in shares)					0
Issuance of Series E preferred stock	285,721		0			1,612	174,206	0	109,903
Common stock issued for:
New issuance, net of cost	285,721		0			1,612	174,206	0	109,903
Exercise of stock options and warrants	182					5	177
Restricted stock awards	0					4	(4)
Employee stock purchase plan	793					9	784
Director compensation plan	660					1	659
Ending balance at Jun. 30, 2022	4,727,623			412,500		60,722	1,880,913		0	2,616,525		(243,037)
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	334,948									334,948
Other comprehensive loss, net of tax	(46,454)											(46,454)
Cash dividends declared on common stock	(48,803)									(48,803)
Dividends on Series D and E preferred stock	(13,982)									(13,982)
Common stock repurchases under authorized program	0								0
Stock-based compensation	16,403						16,403
Issuance of Series E preferred stock (in shares)					0
Issuance of Series E preferred stock	0		0			0	0	0	0
Common stock issued for:
New issuance, net of cost	0		$ 0			0	0	$ 0	0
Exercise of stock options and warrants	2,216					54	2,162
Restricted stock awards	(1,662)					283	(283)		(1,662)
Employee stock purchase plan	1,601					22	1,579
Director compensation plan	1,351					63	1,288
Ending balance at Jun. 30, 2023	$ 5,041,912			412,500		61,219	1,923,623		(1,966)	3,120,626		(474,090)
Common stock issued for:
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]
Beginning balance at Mar. 31, 2023	$ 5,015,506			412,500		61,198	1,913,947		(1,966)	2,997,263		(367,436)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	154,750									154,750
Other comprehensive loss, net of tax	(106,654)											(106,654)
Cash dividends declared on common stock	(24,396)									(24,396)
Dividends on Series D and E preferred stock	(6,991)									(6,991)
Stock-based compensation	8,108						8,108
Common stock issued for:
Exercise of stock options and warrants	0					0	0
Restricted stock awards	0					8	(8)		0
Employee stock purchase plan	907					13	894
Director compensation plan	682					0	682
Ending balance at Jun. 30, 2023	$ 5,041,912			$ 412,500		$ 61,219	$ 1,923,623		$ (1,966)	$ 3,120,626		$ (474,090)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Cash dividends declared on common stock (usd per share)	$ 0.40	$ 0.34	$ 0.80	$ 0.68
Series D Preferred Stock
Dividends on preferred stock (usd per share)	0.41	0.41	0.82	0.82
Series E Preferred Stock
Dividends on preferred stock (usd per share)	$ 429.69	$ 429.69	$ 859.38	$ 859.38

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities:
Net income	$ 334,948	$ 221,904
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	51,559	24,523
Depreciation, amortization and accretion, net	34,997	45,187
Stock-based compensation expense	16,403	14,889
Amortization of premium on securities, net	743	1,475
Accretion of discount and deferred fees on loans, net	(9,067)	(13,960)
Mortgage servicing rights fair value changes, net of economic hedge	13,190	(39,658)
Non-designated derivatives fair value changes, net	(2,088)	(236)
Originations and purchases of mortgage loans held-for-sale	(980,276)	(1,716,502)
Early buy-out exercises of mortgage loans held-for-sale guaranteed by U.S. government agencies, net of subsequent paydowns or payoffs	29,890	43,288
Proceeds from sales of mortgage loans held-for-sale	900,046	1,916,314
Bank owned life insurance (“BOLI”) (gains) losses	(2,673)	836
(Increase) decrease in trading securities, net	(1,900)	51
Decrease in brokerage customer receivables, net	665	4,541
Gains on mortgage loans sold	(24,133)	(31,137)
(Gains) losses on investment securities, net	(1,398)	10,579
Losses on sales of premises and equipment, net	1,594	2,126
Losses (gains) on sales and fair value adjustments of other real estate owned, net	100	(868)
(Increase) decrease in accrued interest receivable and other assets, net	(83,646)	130,148
Increase in accrued interest payable and other liabilities, net	129,238	209,824
Net Cash Provided by Operating Activities	408,192	823,324
Investing Activities:
Proceeds from maturities and calls of available-for-sale securities	2,032,564	208,534
Proceeds from maturities and calls of held-to-maturity securities	84,015	124,986
Proceeds from sales of available-for-sale securities	0	0
Proceeds from sales of equity securities with readily determinable fair value	23,592	18,753
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	67	529
Purchases of available-for-sale securities	(1,359,722)	(1,224,316)
Purchases of held-to-maturity securities	(8,439)	(596,897)
Purchases of equity securities with readily determinable fair value	(26,677)	(27,805)
Purchases of equity securities without readily determinable fair value	(5,600)	(8,480)
Redemptions (purchases) of Federal Home Loan Bank and Federal Reserve Bank stock, net	29,642	(760)
Distributions from investments in partnerships, net	4,995	3,196
Net cash paid in business combinations	(4,966)	0
Proceeds from sales of other real estate owned	1,168	3,669
Decrease in securities purchased under resale agreements with terms exceeding three months, net	0	225,000
(Increase) decrease in interest-bearing deposits with banks, net	(172,149)	2,105,160
Increase in loans, net	(1,820,788)	(2,202,286)
Redemption of BOLI	0	960
Purchases of premises and equipment, net	(9,318)	(23,366)
Net Cash Used for Investing Activities	(1,231,616)	(1,393,123)
Financing Activities:
Increase in deposit accounts, net	1,136,159	497,735
Increase (decrease) in other borrowings, net	59,552	(5,059)
Decrease in Federal Home Loan Bank advances, net	(290,000)	(75,000)
Proceeds from common stock offering, net	0	286,315
Cash payments to settle contingent consideration liabilities recognized in business combinations	(57)	0
Issuance of common shares resulting from the exercise of stock options and employee stock purchase plan	5,168	6,464
Common stock repurchases for tax withholdings related to stock-based compensation	(1,662)	0
Dividends paid	(62,785)	(52,914)
Net Cash Provided by Financing Activities	846,375	657,541
Net Increase in Cash and Cash Equivalents	22,951	87,742
Cash and Cash Equivalents at Beginning of Period	490,966	411,205
Cash and Cash Equivalents at End of Period	$ 513,917	$ 498,947

Basis of Presentation

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2023
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, 2022 (“2022 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 2022 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.

Recent Accounting Developments

Recent Accounting Developments	6 Months Ended
Recent Accounting Developments	Jun. 30, 2023
Accounting Policies [Abstract]
Recent Accounting Developments	Recent Accounting Developments Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting,” which provides temporary optional relief for contracts modified as a result of reference rate reform meeting certain modification criteria, generally allowing an entity to account for contract modifications occurring due to reference rate reform as an event that does not require contract remeasurement or reassessment of a previous accounting determination at the modification date. The guidance also includes temporary optional expedients intended to provide relief from various hedge effectiveness requirements for hedging relationships affected by reference rate reform, provided certain criteria are met, and allows a one-time election to sell or transfer to either available-for-sale or trading any held-to-maturity (“HTM”) debt securities that refer to an interest rate affected by reference rate reform and were classified as HTM prior to January 1, 2020. Additionally, in January 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848): Scope,” which provided additional clarification that certain optional expedients and exceptions noted above apply to derivative instruments that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform. This guidance was effective upon issuance and was able to be applied prospectively, with certain exceptions, through December 31, 2022. In November 2020, federal and state banking regulators issued the “Interagency Policy Statement on Reference Rates for Loans” to reiterate that a specific replacement rate for loans impacted by reference rate reform has not been endorsed and entities may utilize any replacement reference rate determined to be appropriate based on its funding model and customer needs. As discussed in the “Interagency Policy Statement on Reference Rates for Loans,” fallback language should be included in lending contracts to provide for use of a robust fallback rate if the initial reference rate is discontinued. Additionally, federal banking regulators issued the “Interagency Statement on LIBOR Transition” acknowledging that the administrator of the London Inter-Bank Offered Rate (“LIBOR”) has announced it will consult on its intention to cease the publication of the one week and two month USD LIBOR settings immediately following the LIBOR publication on December 31, 2021, and the remaining USD LIBOR settings immediately following the LIBOR publication on June 30, 2023. As discussed in the “Interagency Statement on LIBOR Transition,” regulators encouraged banks to cease entering into new contracts that use USD LIBOR as a reference rate as soon as practicable and in any event by December 31, 2021, in order to facilitate an orderly, safe and sound LIBOR transition. The Company has discontinued use of USD LIBOR in new contracts and continues to monitor efforts and evaluate the impact of reference rate reform on its consolidated financial statements. As of June 30, 2023, the Company has mitigated its remaining LIBOR exposure, with any outstanding or committed exposures being proactively moved to an alternative rate or falling back per the terms of the contract or as per the AIRLA. In December 2022, the FASB issued ASU No. 2022-06 “Reference Rate Reform (Topic 848) - Deferral of the Sunset Date of Topic 848,” which updated the sunset date of Topic 848 from December 31, 2022, to December 31, 2024, after which entities would no longer be permitted to apply the relief in Topic 848. The objective of Topic 848 is to provide relief during the temporary transition period, thus, the FASB included a sunset provision within Topic 848 based on expectations of when LIBOR would cease being published. This guidance was effective upon issuance and can be applied prospectively, with certain exceptions, through December 31, 2024. The Company expects that adoption of this standard on activities subsequent to June 30, 2023 will not have a material impact on the consolidated financial statements. Business Combinations In October 2021, the FASB issued ASU No. 2021-08, “Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers,” which clarifies diversity in practice related to recognition and measurement of contract assets and liabilities related to revenue contracts with customers which are acquired in a business combination by aligning business combination accounting with the subsequent accounting for contract assets and liabilities by requiring entities to apply ASC Topic 606, Revenue from Contracts with Customers, in order to recognize and measure deferred revenue in a business combination. The guidance also creates an exception to the general recognition and measurement principle in ASC Topic 805, Business Combinations, under which such amounts are recognized by the acquirer at fair value on the acquisition date by providing two practical expedients for acquirers. The Company adopted ASU No. 2021-08 as of January 1, 2023. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Fair Value Hedging - Portfolio Layer Method In March 2022, the FASB issued ASU No. 2022-01, “Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method” which expands the current last-of-layer method by allowing multiple hedged layers to be designated for a single closed portfolio of financial assets or one or more beneficial interests secured by a portfolio of financial instruments. The Company adopted ASU No. 2022-01 as of January 1, 2023. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Troubled Debt Restructurings and Vintage Disclosures In March 2022, the FASB issued ASU No. 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures” which eliminates the separate recognition and measurement guidance for troubled debt restructurings (“TDRs”) by creditors, while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty, and requiring entities to disclose current-period gross write-offs by year of origination for certain financing receivables and net investments in leases. The Company adopted ASU No. 2022-02 as of January 1, 2023. Guidance was adopted under a modified retrospective approach and, at January 1, 2023, the Company recognized a cumulative-effect adjustment to the allowance for loan losses of $741,000 representing the change in methodology of estimating expected credit losses for loans previously classified as TDRs. This amount was a positive adjustment to the allowance for loan losses, presented separately on the Company’s Consolidated Statements of Condition, with an offsetting negative adjustment recorded directly to retained earnings, net of taxes. Fair Value Measurement - Equity Securities with Contractual Sale Restrictions In June 2022, the FASB issued ASU No. 2022-03, “Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions” which clarifies the guidance in ASC 820 when measuring the fair value of an equity security subject to contractual restrictions that prohibit the sale of an equity security, and also requires specific disclosures related to these types of securities. This guidance is effective for fiscal years beginning after December 15, 2023, including interim periods therein, and is to be applied under a prospective approach. Early adoption is permitted. The Company does not expect this guidance to have a material impact on the Company’s consolidated financial statements. Legislation Issued Related to Stock Repurchases On August 16, 2022, the Inflation Reduction Act of 2022 (the “IRA”) was signed by the President of the United States. Among other things, the IRA imposes a 1% excise tax on the fair market value of stock repurchased after December 31, 2022. With certain exceptions, the value of stock repurchased is determined net of stock issued in the year, including shares issued pursuant to compensatory arrangements. This new legislation did not have a material impact on the Company's consolidated financial statements. Equity Method and Joint Ventures - Investments in Tax Credit Structures

Business Combinations

Business Combinations	6 Months Ended
Business Combinations	Jun. 30, 2023
Business Combination and Asset Acquisition [Abstract]
Business Combinations	Business CombinationsOn 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 (collectively, “Rothschild & Co Asset Management U.S.”). As of the acquisition date, the Company acquired approximately $12.6 million in assets. As the transaction was determined to be a business combination, the Company recorded goodwill of approximately $2.6 million on the purchase.

Cash and Cash Equivalents

Cash and Cash Equivalents	6 Months Ended
Cash and Cash Equivalents	Jun. 30, 2023
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	Cash and Cash EquivalentsFor 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.

Investment Securities

Investment Securities	6 Months Ended
Investment Securities	Jun. 30, 2023
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: June 30, 2023 (In thousands) Amortized Gross Gross Fair Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 80,000 — (5,725) 74,275 Municipal 173,540 102 (6,231) 167,411 Corporate notes: Financial issuers 83,995 — (12,920) 71,075 Other 1,000 — (15) 985 Mortgage-backed: (1) Mortgage-backed securities 3,585,943 — (483,659) 3,102,284 Collateralized mortgage obligations 94,373 — (17,922) 76,451 Total available-for-sale securities $ 4,018,851 $ 102 $ (526,472) $ 3,492,481 Held-to-maturity securities U.S. government agencies $ 339,604 $ — $ (71,022) $ 268,582 Municipal 176,128 362 (4,502) 171,988 Mortgage-backed: (1) Mortgage-backed securities 2,832,138 — (574,114) 2,258,024 Collateralized mortgage obligations 159,120 — (23,014) 136,106 Corporate notes 57,889 35 (4,733) 53,191 Total held-to-maturity securities $ 3,564,879 $ 397 $ (677,385) $ 2,887,891 Less: Allowance for credit losses (406) Held-to-maturity securities, net of allowance for credit losses $ 3,564,473 Equity securities with readily determinable fair value $ 120,629 $ 3,711 $ (8,065) $ 116,275 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. December 31, 2022 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ 14,943 $ 5 $ — $ 14,948 U.S. government agencies 80,000 36 (5,814) 74,222 Municipal 173,861 230 (5,436) 168,655 Corporate notes: Financial issuers 93,994 — (9,291) 84,703 Other 1,000 2 — 1,002 Mortgage-backed: (1) Mortgage-backed securities 3,308,494 238 (488,795) 2,819,937 Collateralized mortgage obligations 97,342 — (17,792) 79,550 Total available-for-sale securities $ 3,769,634 $ 511 $ (527,128) $ 3,243,017 Held-to-maturity securities U.S. government agencies $ 339,614 $ — $ (75,293) $ 264,321 Municipal 179,027 477 (4,066) 175,438 Mortgage-backed: (1) Mortgage-backed securities 2,900,031 — (583,682) 2,316,349 Collateralized mortgage obligations 164,151 — (23,322) 140,829 Corporate notes 58,232 — (5,348) 52,884 Total held-to-maturity securities $ 3,641,055 $ 477 $ (691,711) $ 2,949,821 Less: Allowance for credit losses (488) Held-to-maturity securities, net of allowance for credit losses $ 3,640,567 Equity securities with readily determinable fair value $ 115,552 $ 2,935 $ (8,122) $ 110,365 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. June 30, 2022 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 50,000 — (1,913) 48,087 Municipal 170,268 570 (4,133) 166,705 Corporate notes: Financial issuers 93,994 — (5,177) 88,817 Other 1,000 — (4) 996 Mortgage-backed: (1) Mortgage-backed securities 2,915,107 28 (336,517) 2,578,618 Collateralized mortgage obligations 101,132 1 (14,235) 86,898 Total available-for-sale securities $ 3,331,501 $ 599 $ (361,979) $ 2,970,121 Held-to-maturity securities U.S. government agencies $ 294,631 $ — $ (53,222) $ 241,409 Municipal 179,642 1,195 (2,796) 178,041 Mortgage-backed: (1) Mortgage-backed securities 2,719,754 — (438,050) 2,281,704 Collateralized mortgage obligations 170,951 — (16,254) 154,697 Corporate notes 48,574 2 (4,158) 44,418 Total held-to-maturity securities $ 3,413,552 $ 1,197 $ (514,480) $ 2,900,269 Less: Allowance for credit losses (83) Held-to-maturity securities, net of allowance for credit losses $ 3,413,469 Equity securities with readily determinable fair value $ 96,247 $ 3,143 $ (6,095) $ 93,295 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. Equity securities without readily determinable fair values totaled $53.4 million as of June 30, 2023. 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. The Company recorded no upward or downward adjustments related to such observable price changes for the three and six months ended June 30, 2023 or June 30, 2022. 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 June 30, 2023, the Company recorded no impairment of equity securities without readily determinable fair values. During the three months ended June 30, 2022, the Company recorded $3.8 million of impairment of equity securities without readily determinable fair values. During the six months ended June 30, 2023, the Company recorded no of impairment of equity securities without readily determinable fair values. During the six months ended June 30, 2022, the Company recorded $4.4 million of 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 June 30, 2023: Continuous unrealized Continuous unrealized Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale securities U.S. government agencies $ 29,909 $ (91) $ 44,366 $ (5,634) $ 74,275 $ (5,725) Municipal 101,356 (1,988) 53,731 (4,243) 155,087 (6,231) Corporate notes: Financial issuers — — 71,075 (12,920) 71,075 (12,920) Other 985 (15) — — 985 (15) Mortgage-backed: (1) Mortgage-backed securities 876,659 (18,454) 2,225,624 (465,205) 3,102,283 (483,659) Collateralized mortgage obligations 37 (1) 76,414 (17,921) 76,451 (17,922) Total available-for-sale securities $ 1,008,946 $ (20,549) $ 2,471,210 $ (505,923) $ 3,480,156 $ (526,472) (1) Consisting entirely of residential mortgage-backed securities, none of which 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 June 30, 2023 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 June 30, 2023 were primarily mortgage-backed securities with unrealized losses due to increased market rates during such period. See Note (7) “Allowance for Credit Losses” for further discussion regarding any credit losses associated with held-to-maturity securities at June 30, 2023. 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 June 30, Six months ended June 30, (In thousands) 2023 2022 2023 2022 Realized gains on investment securities $ 6 $ 7 $ 611 $ 265 Realized losses on investment securities (6) (7) (51) (14) Net realized gains on investment securities — — 560 251 Unrealized gains on equity securities with readily determinable fair value 684 2 2,974 182 Unrealized losses on equity securities with readily determinable fair value (684) (4,013) (2,136) (6,655) Net unrealized gains (losses) on equity securities with readily determinable fair value — (4,011) 838 (6,473) Upward adjustments of equity securities without readily determinable fair values — — — — Downward adjustments of equity securities without readily determinable fair values — — — — Impairment of equity securities without readily determinable fair values — (3,786) — (4,357) Adjustment and impairment, net, of equity securities without readily determinable fair values — (3,786) — (4,357) Gains (losses) on investment securities, net $ — $ (7,797) $ 1,398 $ (10,579) Proceeds from sales of available-for-sale securities (1) $ — $ — $ — $ — Proceeds from sales of equity securities with readily determinable fair value — — 23,592 18,753 Proceeds from sales and capital distributions of equity securities without readily determinable fair value — 279 67 529 (1) Includes proceeds from available-for-sale securities sold in accordance with written covered call options sold to a third party. The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of June 30, 2023, December 31, 2022 and June 30, 2022, 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: June 30, 2023 December 31, 2022 June 30, 2022 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Available-for-sale securities Due in one year or less $ 93,724 $ 93,137 $ 119,830 $ 119,275 $ 55,058 $ 54,824 Due in one to five years 138,704 126,776 63,644 61,701 75,941 74,559 Due in five to ten years 41,655 36,315 115,734 105,076 115,378 109,492 Due after ten years 64,452 57,518 64,590 57,478 68,885 65,730 Mortgage-backed 3,680,316 3,178,735 3,405,836 2,899,487 3,016,239 2,665,516 Total available-for-sale securities $ 4,018,851 $ 3,492,481 $ 3,769,634 $ 3,243,017 $ 3,331,501 $ 2,970,121 Held-to-maturity securities Due in one year or less $ 2,479 $ 2,475 $ 1,340 $ 1,332 $ 1,457 $ 1,458 Due in one to five years 102,182 96,806 94,705 89,093 84,906 80,705 Due in five to ten years 106,708 105,054 115,318 113,758 105,450 105,491 Due after ten years 362,252 289,426 365,510 288,460 331,034 276,214 Mortgage-backed 2,991,258 2,394,130 3,064,182 2,457,178 2,890,705 2,436,401 Total held-to-maturity securities $ 3,564,879 $ 2,887,891 $ 3,641,055 $ 2,949,821 $ 3,413,552 $ 2,900,269 Less: Allowance for credit losses (406) (488) (83) Held-to-maturity securities, net of allowance for credit losses $ 3,564,473 $ 3,640,567 $ 3,413,469 Securities having a carrying value of $6.4 billion at June 30, 2023 as well as securities having a carrying value of $2.8 billion at both December 31, 2022 and June 30, 2022, 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 June 30, 2023, there were no securities of a single issuer, other than U.S. government-sponsored agency securities, which exceeded 10% of shareholders’ equity.

Loans

Loans	6 Months Ended
Loans	Jun. 30, 2023
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The following table shows the Company’s loan portfolio by category as of the dates shown: June 30, December 31, June 30, (Dollars in thousands) 2023 2022 2022 Balance: Commercial $ 12,600,471 $ 12,549,164 $ 12,047,105 Commercial real estate 10,608,811 9,950,947 9,407,205 Home equity 336,974 332,698 325,826 Residential real estate 2,643,240 2,372,383 2,078,907 Premium finance receivables Property and casualty insurance 6,762,698 5,849,459 5,541,447 Life insurance 8,039,273 8,090,998 7,608,433 Consumer and other 31,941 50,836 44,180 Total loans, net of unearned income $ 41,023,408 $ 39,196,485 $ 37,053,103 Mix: Commercial 31 % 32 % 32 % Commercial real estate 26 25 25 Home equity 1 1 1 Residential real estate 6 6 6 Premium finance receivables Property and casualty insurance 16 15 15 Life insurance 20 21 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 lease finance and franchise 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 $281.7 million at June 30, 2023, $224.5 million at December 31, 2022 and $160.6 million at June 30, 2022. Total loans, excluding purchased credit deteriorated (“PCD”) loans, include net deferred loan fees and costs and fair value purchase accounting adjustments totaling $72.8 million at June 30, 2023, $71.8 million at December 31, 2022 and $70.2 million at June 30, 2022. 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.

Allowance for Credit Losses

Allowance for Credit Losses	6 Months Ended
Allowance for Credit Losses	Jun. 30, 2023
Credit Loss [Abstract]
Allowance for Credit Losses	Allowance for Credit LossesIn 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 2022 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 The tables below show the aging of the Company’s loan portfolio by the segmentation noted above at June 30, 2023, December 31, 2022 and June 30, 2022: As of June 30, 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 $ 40,460 $ 573 $ 22,808 $ 48,970 $ 12,487,660 $ 12,600,471 Commercial real estate Construction and development 12,536 — — 766 1,747,134 1,760,436 Non-construction 5,947 — 1,054 13,452 8,827,922 8,848,375 Home equity 1,361 110 316 601 334,586 336,974 Residential real estate, excluding early buy-out loans 13,652 — 7,243 872 2,433,625 2,455,392 Premium finance receivables Property and casualty insurance loans 19,583 12,785 22,670 32,751 6,674,909 6,762,698 Life insurance loans 6 1,667 3,729 90,117 7,943,754 8,039,273 Consumer and other 4 28 51 146 31,712 31,941 Total loans, net of unearned income, excluding early buy-out loans $ 93,549 $ 15,163 $ 57,871 $ 187,675 $ 40,481,302 $ 40,835,560 Early buy-out loans guaranteed by U.S. government agencies (1) 117 57,728 918 — 129,085 187,848 Total loans, net of unearned income $ 93,666 $ 72,891 $ 58,789 $ 187,675 $ 40,610,387 $ 41,023,408 As of December 31, 2022 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 $ 35,579 $ 462 $ 21,128 $ 56,696 $ 12,435,299 $ 12,549,164 Commercial real estate Construction and development 416 — 361 14,390 1,471,763 1,486,930 Non-construction 5,971 — 1,883 16,285 8,439,878 8,464,017 Home equity 1,487 — — 2,152 329,059 332,698 Residential real estate, excluding early buy-out loans 10,171 — 4,364 9,982 2,183,078 2,207,595 Premium finance receivables Property and casualty insurance loans 13,470 15,841 14,926 40,557 5,764,665 5,849,459 Life insurance loans — 17,245 5,260 68,725 7,999,768 8,090,998 Consumer and other 6 49 18 224 50,539 50,836 Total loans, net of unearned income, excluding early buy-out loans $ 67,100 $ 33,597 $ 47,940 $ 209,011 $ 38,674,049 $ 39,031,697 Early buy-out loans guaranteed by U.S. government agencies (1) 31,279 47,450 984 1,584 83,491 164,788 Total loans, net of unearned income $ 98,379 $ 81,047 $ 48,924 $ 210,595 $ 38,757,540 $ 39,196,485 (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 June 30, 2022 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 $ 32,436 $ — $ 16,789 $ 14,120 $ 11,983,760 $ 12,047,105 Commercial real estate Construction and development 889 — — 1,144 1,504,285 1,506,318 Non-construction 9,829 — 6,771 33,076 7,851,211 7,900,887 Home equity 1,084 — 154 930 323,658 325,826 Residential real estate, excluding early buy-out loans 8,330 — 534 147 1,956,040 1,965,051 Premium finance receivables Property and casualty insurance loans 13,303 6,447 15,299 23,313 5,483,085 5,541,447 Life insurance loans — — 1,796 65,155 7,541,482 7,608,433 Consumer and other 8 25 8 119 44,020 44,180 Total loans, net of unearned income, excluding early buy-out loans $ 65,879 $ 6,472 $ 41,351 $ 138,004 $ 36,687,541 $ 36,939,247 Early buy-out loans guaranteed by U.S. government agencies (1) 23,815 50,314 272 — 39,455 113,856 Total loans, net of unearned income $ 89,694 $ 56,786 $ 41,623 $ 138,004 $ 36,726,996 $ 37,053,103 (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 2022 Form 10-K. The table below shows the Company’s loan portfolio by credit quality indicator and year of origination at June 30, 2023: Year of Origination Revolving Total (In thousands) 2023 2022 2021 2020 2019 Prior Revolving to Term Loans Loan Balances: Commercial, industrial and other Pass $ 1,432,042 $ 2,302,642 $ 1,892,615 $ 842,764 $ 536,136 $ 1,091,823 $ 4,016,909 $ 3,612 $ 12,118,543 Special mention 4,953 44,081 72,155 5,689 18,040 6,820 94,418 1,328 247,484 Substandard accrual 3,046 36,007 39,858 3,177 9,549 41,282 60,683 382 193,984 Substandard nonaccrual/doubtful — 1,100 5,576 1,848 27,455 4,316 165 — 40,460 Total commercial, industrial and other $ 1,440,041 $ 2,383,830 $ 2,010,204 $ 853,478 $ 591,180 $ 1,144,241 $ 4,172,175 $ 5,322 $ 12,600,471 Construction and development Pass $ 137,138 $ 623,589 $ 479,051 $ 191,308 $ 110,298 $ 115,876 $ 16,549 $ 367 $ 1,674,176 Special mention — — 1,699 18,420 20,000 14,250 — — 54,369 Substandard accrual — 2,475 — — 3,464 13,416 — — 19,355 Substandard nonaccrual/doubtful — 4,190 — 8,248 — 98 — — 12,536 Total construction and development $ 137,138 $ 630,254 $ 480,750 $ 217,976 $ 133,762 $ 143,640 $ 16,549 $ 367 $ 1,760,436 Non-construction Pass $ 824,864 $ 1,857,052 $ 1,423,876 $ 972,603 $ 788,128 $ 2,549,042 $ 192,636 $ 1,415 $ 8,609,616 Special mention 2,479 5,088 28,536 — 26,357 63,570 1,439 — 127,469 Substandard accrual — 1,431 2,964 21,406 11,012 68,530 — — 105,343 Substandard nonaccrual/doubtful — — 25 — 586 5,336 — — 5,947 Total non-construction $ 827,343 $ 1,863,571 $ 1,455,401 $ 994,009 $ 826,083 $ 2,686,478 $ 194,075 $ 1,415 $ 8,848,375 Home equity Pass $ — $ — $ 63 $ — $ 93 $ 6,207 $ 317,066 $ — $ 323,429 Special mention — 230 — — 59 1,763 2,370 — 4,422 Substandard accrual — — — — — 6,596 1,038 128 7,762 Substandard nonaccrual/doubtful — — 77 115 18 937 98 116 1,361 Total home equity $ — $ 230 $ 140 $ 115 $ 170 $ 15,503 $ 320,572 $ 244 $ 336,974 Residential real estate Early buy-out loans guaranteed by U.S. government agencies $ — $ 24 $ 1,384 $ 9,713 $ 19,125 $ 157,602 $ — $ — $ 187,848 Pass 254,659 827,009 809,152 221,005 116,043 189,815 — — 2,417,683 Special mention 39 3,470 994 1,355 534 5,317 — — 11,709 Substandard accrual 583 2,562 4,377 1,165 260 3,401 — — 12,348 Substandard nonaccrual/doubtful — 912 1,206 744 2,497 8,293 — — 13,652 Total residential real estate $ 255,281 $ 833,977 $ 817,113 $ 233,982 $ 138,459 $ 364,428 $ — $ — $ 2,643,240 Premium finance receivables - property and casualty Pass $ 5,638,768 $ 919,368 $ 26,646 $ 4,012 $ 361 $ — $ — $ — $ 6,589,155 Special mention 130,056 17,308 255 10 — — — — 147,629 Substandard accrual 3,220 3,110 1 — — — — — 6,331 Substandard nonaccrual/doubtful 4,554 14,811 213 5 — — — — 19,583 Total premium finance receivables - property and casualty $ 5,776,598 $ 954,597 $ 27,115 $ 4,027 $ 361 $ — $ — $ — $ 6,762,698 Premium finance receivables - life Pass $ 125,737 $ 584,412 $ 875,181 $ 1,063,640 $ 949,935 $ 4,404,124 $ — $ — $ 8,003,029 Special mention — — 758 6,323 — 29,157 — — 36,238 Substandard accrual — — — — — — — — — Substandard nonaccrual/doubtful — 6 — — — — — — 6 Total premium finance receivables - life $ 125,737 $ 584,418 $ 875,939 $ 1,069,963 $ 949,935 $ 4,433,281 $ — $ — $ 8,039,273 Consumer and other Pass $ 2,344 $ 1,904 $ 1,077 $ 163 $ 399 $ — $ 25,849 $ — $ 31,736 Special mention 2 13 — — 2 127 1 — 145 Substandard accrual — 9 — — — 37 10 — 56 Substandard nonaccrual/doubtful — — 4 — — — — — 4 Total consumer and other $ 2,346 $ 1,926 $ 1,081 $ 163 $ 401 $ 164 $ 25,860 $ — $ 31,941 Total loans Early buy-out loans guaranteed by U.S. government agencies $ — $ 24 $ 1,384 $ 9,713 $ 19,125 $ 157,602 $ — $ — $ 187,848 Pass 8,415,552 7,115,976 5,507,661 3,295,495 2,501,393 8,356,887 4,569,009 5,394 39,767,367 Special mention 137,529 70,190 104,397 31,797 64,992 121,004 98,228 1,328 629,465 Substandard accrual 6,849 45,594 47,200 25,748 24,285 133,262 61,731 510 345,179 Substandard nonaccrual/doubtful 4,554 21,019 7,101 10,960 30,556 18,980 263 116 93,549 Total loans $ 8,564,484 $ 7,252,803 $ 5,667,743 $ 3,373,713 $ 2,640,351 $ 8,787,735 $ 4,729,231 $ 7,348 $ 41,023,408 Gross write offs Three months ended June 30, 2023 $ 4,963 $ 569 $ 1,055 $ 5,159 $ 5,014 $ 1,756 $ — $ — $ 18,516 Six months ended June 30, 2023 5,441 5,462 2,249 5,496 5,332 1,887 — — 25,867 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 June 30, 2023 Year of Origination Total (In thousands) 2023 2022 2021 2020 2019 Prior Balance Amortized Cost Balances: U.S. government agencies 1-4 internal grade $ — $ 160,000 $ 147,806 $ 25,000 $ 4,000 $ 2,798 $ 339,604 5-7 internal grade — 8-10 internal grade — Total U.S. government agencies $ — $ 160,000 $ 147,806 $ 25,000 $ 4,000 $ 2,798 $ 339,604 Municipal 1-4 internal grade $ 1,996 $ 1,041 $ 6,955 $ 264 $ 616 $ 165,256 $ 176,128 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total municipal $ 1,996 $ 1,041 $ 6,955 $ 264 $ 616 $ 165,256 $ 176,128 Mortgage-backed securities 1-4 internal grade $ 5,065 $ 595,015 $ 2,391,178 $ — $ — $ — $ 2,991,258 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total mortgage-backed securities $ 5,065 $ 595,015 $ 2,391,178 $ — $ — $ — $ 2,991,258 Corporate notes 1-4 internal grade $ — $ 14,964 $ — $ 6,008 $ 7,269 $ 29,648 $ 57,889 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total corporate notes $ — $ 14,964 $ — $ 6,008 $ 7,269 $ 29,648 $ 57,889 Total held-to-maturity securities $ 3,564,879 Less: Allowance for credit losses (406) Held-to-maturity securities, net of allowance for credit losses $ 3,564,473 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. June 30, December 31, June 30, (In thousands) 2023 2022 2022 Allowance for loan losses $ 302,499 $ 270,173 $ 251,769 Allowance for unfunded lending-related commitments losses 84,881 87,275 60,340 Allowance for loan losses and unfunded lending-related commitments losses 387,380 357,448 312,109 Allowance for held-to-maturity securities losses 406 488 83 Allowance for credit losses $ 387,786 $ 357,936 $ 312,192 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 June 30, 2023, excluding loans carried at fair value, substandard nonaccrual loans totaling $23.5 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 and six months ended June 30, 2023 and 2022 is as follows. Three months ended June 30, 2023 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 $ 149,501 $ 194,780 $ 7,728 $ 11,434 $ 11,955 $ 400 $ 375,798 Other adjustments — — — — 41 — 41 Charge-offs (5,629) (8,124) — — (4,653) (110) (18,516) Recoveries 505 25 37 6 890 23 1,486 Provision for credit losses (1,235) 29,015 (798) 812 813 (36) 28,571 Allowance for credit losses at period end $ 143,142 $ 215,696 $ 6,967 $ 12,252 $ 9,046 $ 277 $ 387,380 By measurement method: Individually measured $ 7,205 $ 5,819 $ — $ 106 $ — $ — $ 13,130 Collectively measured 135,937 209,877 6,967 12,146 9,046 277 374,250 Loans at period end Individually measured $ 40,460 $ 18,483 $ 1,361 $ 13,496 $ — $ 4 $ 73,804 Collectively measured 12,560,011 10,590,328 335,613 2,429,297 14,801,971 31,937 40,749,157 Loans held at fair value — — — 200,447 — — 200,447 Three months ended June 30, 2022 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 $ 120,911 $ 144,906 $ 10,566 $ 9,429 $ 14,722 $ 634 $ 301,168 Other adjustments — — — — (56) — (56) Charge-offs (8,928) (40) (192) — (2,903) (253) (12,316) Recoveries 996 553 123 6 1,119 23 2,820 Provision for credit losses 29,940 (1,687) (3,507) 1,044 (5,380) 83 20,493 Allowance for credit losses at period end $ 142,919 $ 143,732 $ 6,990 $ 10,479 $ 7,502 $ 487 $ 312,109 By measurement method: Individually measured $ 5,674 $ 99 $ 105 $ 790 $ — $ — $ 6,668 Collectively measured 137,245 143,633 6,885 9,689 7,502 487 305,441 Loans at period end Individually measured $ 34,892 $ 20,377 $ 11,876 $ 18,333 $ — $ 79 $ 85,557 Collectively measured 12,012,213 9,386,828 313,950 1,937,817 13,149,880 44,101 36,844,789 Loans held at fair value — — — 122,757 — — 122,757 Six months ended June 30, 2023 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 $ 142,769 $ 184,352 $ 7,573 $ 11,585 $ 10,671 $ 498 $ 357,448 Cumulative effect adjustment from the adoption of ASU 2016-13 111 1,356 (33) (692) — (1) 741 Other adjustments — — — — 45 — 45 Charge-offs (8,172) (8,129) — — (9,303) (263) (25,867) Recoveries 897 125 72 10 2,213 55 3,372 Provision for credit losses 7,537 37,992 (645) 1,349 5,420 (12) 51,641 Allowance for credit losses at period end $ 143,142 $ 215,696 $ 6,967 $ 12,252 $ 9,046 $ 277 $ 387,380 Six months ended June 30, 2022 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 $ 119,307 $ 144,583 $ 10,699 $ 8,782 $ 15,859 $ 423 $ 299,653 Other adjustments — — — — (34) — (34) Charge-offs (10,342) (817) (389) (466) (4,581) (446) (17,041) Recoveries 1,534 585 216 11 2,595 72 5,013 Provision for credit losses 32,420 (619) (3,536) 2,152 (6,337) 438 24,518 Allowance for credit losses at period end $ 142,919 $ 143,732 $ 6,990 $ 10,479 $ 7,502 $ 487 $ 312,109 For the three and six months ended June 30, 2023, the Company recognized approximately $28.6 million and $51.6 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 June 30, 2023. Other key drivers of provision for credit losses in these portfolios include, but are not limited to, stable loan risk rating migration. Net charge-offs in the three and six month periods ending June 30, 2023, totaled $17.0 million and $22.5 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 and six month period ended June 30, 2023, the Company recognized approximately $(57,000) and $(82,000), respectively, of provision for credit losses related to held-to-maturity securities. At June 30, 2023, the Company did not identify any losses within its portfolio that it would deem a credit loss and require additional measurement of an allowance for credit losses. 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 The table below presents a summary of the balance immediately following the modification of loans to borrowers experiencing financial difficulties during the three months and six months ended June 30, 2023: Three months ended June 30, 2023 (Dollars in thousands) Total (1) Percentage of Total Class of Loan Extension of Term (1) Reduction of Interest Rate (1) Delay in Contractual Payments (1) Extension of Term and Reduction of Interest Rate (1) Commercial Commercial, industrial and other $ 423 0.0 % $ — $ — $ — $ 423 Commercial real estate Non-construction 4,376 0.0 — — — 4,376 Home equity — — — — — — Residential real estate 264 0.0 143 — — 121 Premium finance receivables Property and casualty insurance loans — — — — — — Total loans $ 5,063 0.0 % $ 143 $ — $ — $ 4,920 Weighted average magnitude of modifications: Duration of extension of term 43 months Reduction of interest rate 207 bps Six months ended June 30, 2023 (Dollars in thousands) Total (1) Percentage of Total Class of Loan Extension of Term (1) Reduction of Interest Rate (1) Delay in Contractual Payments (1) Extension of Term and Reduction of Interest Rate (1) Commercial Commercial, industrial and other $ 37,897 0.3 % $ 1,938 $ 221 $ 35,265 $ 473 Commercial real estate Non-construction 5,709 0.1 467 827 39 4,376 Home equity 203 0.1 203 — — — Residential real estate 1,972 0.1 1,396 271 — 305 Premium finance receivables Property and casualty insurance loans 11 — 3 — — 8 Total loans $ 45,792 0.1 % $ 4,007 $ 1,319 $ 35,304 $ 5,162 Weighted average magnitude of modifications: Duration of extension of term 36 months Reduction of interest rate 223 bps Duration of delayed contractual payment terms 17 months (1) Balances represent the recorded investment in the loan at the time of the restructuring. The following table presents a summary of all loans for borrowers experiencing financial difficulties modified during the six months ended June 30, 2023, and such loans that were in payment default under the restructured terms during the respective periods below: (Dollars in thousands) As of June 30, 2023 Three Months Ended June 30, 2023 Six Months Ended Total (2) Payments in Default (1)(2) Payments in Default (1)(2) Commercial Commercial, industrial and other $ 37,897 $ 18,729 $ 18,729 Commercial real estate Non-construction 5,709 923 923 Home equity 203 203 203 Residential real estate 1,972 541 541 Premium finance receivables Property and casualty insurance loans 11 11 11 Total loans $ 45,792 $ 20,407 $ 20,407 (1) Modified loans considered to be in payment default are over 30 days past due subsequent to the restructuring. (2) Balances represent the recorded investment in the loan at the time of the restructuring. TDRs Reporting periods prior to the adoption of ASU 2022-02 as of January 1, 2023 present information on loan modifications representing TDRs under the prior accounting standards and related disclosure requirements. The table below presents a summary of the balance immediately following the modification of loans restructured during the three months ended June 30, 2022 which represent TDRs: Three months ended June 30, 2022 (Dollars in thousands) Total (1)(2) Extension at Below Market Terms (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 2 $ 186 2 $ 185 — $ — — $ — — $ — Commercial real estate Non-construction — — — — — — — — — — Residential real estate and other 14 2,235 14 2,235 10 1,805 — — — — Total loans 16 $ 2,421 16 $ 2,420 10 $ 1,805 — $ — — $ — Six months ended June 30, 2022 (Dollars in thousands) Total (1)(2) Extension at Below Market Terms (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 5 $ 468 4 $ 305 1 $ 85 2 $ 247 — $ — Commercial real estate Non-construction 2 1,907 1 1,178 1 1,178 2 1,907 — — Residential real estate and other 22 3,143 22 3,143 17 2,567 — — — — Total loans 29 $ 5,518 27 $ 4,626 19 $ 3,830 4 $ 2,154 — $ — (1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above. (2) Balances represent the recorded investment in the loan at the time of the restructuring. During the three months ended June 30, 2022, 16 loans totaling $2.4 million were determined to be TDRs. Of these loans extended at below market terms, the weighted average extension had a term of 63 months for the quarter ended June 30, 2022. Further, the weighted average decrease in the stated interest rate for loans with a reduction of interest rate during the period was approximately 96 basis points during the three months ended June 30, 2022. Additionally, no principal balances were forgiven during the quarter ended June 30, 2022. The following table presents a summary of all loans restructured in TDRs during the twelve months ended June 30, 2022 and such loans that were in payment default under the restructured terms during the respective periods below: (Dollars in thousands) As of June 30, 2022 Three Months Ended June 30, 2022 Six months ended June 30, 2022 Total (1)(3) Payments in Default (2)(3) Payments in Default (2)(3) Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 16 $ 4,995 10 $ 4,469 11 $ 4,711 Commercial real estate Non-construction 2 1,907 — — — — Residential real estate and other 39 6,159 2 345 2 345 Total loans 57 $ 13,061 12 $ 4,814 13 $ 5,056 (1) Total TDRs represent all loans restructured om TDRs during the previous twelve months from the date indicated. (2) TDRs considered to be in payment default are over 30 days past due subsequent to the restructuring. (3) Balances represent the recorded investment in the loan at the time of the restructuring.

Goodwill and Other Acquisition-

Goodwill and Other Acquisition-Related Intangible Assets	6 Months Ended
Goodwill and Other Acquisition-Related Intangible Assets	Jun. 30, 2023
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, 2022 Goodwill Impairment Goodwill Adjustments June 30, Community banking $ 545,671 $ — $ — $ — $ 545,671 Specialty finance 38,480 — — 528 39,008 Wealth management 69,373 2,622 — — 71,995 Total $ 653,524 $ 2,622 $ — $ 528 $ 656,674 The wealth management unit’s goodwill increased $2.6 million in the first six months of 2023 as a result of the Rothschild & Co Asset Management U.S. acquisition. The specialty finance unit’s goodwill increased $528,000 in the first six months of 2023 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, 2022, the Company utilized a qualitative approach for its annual goodwill impairment tests of the banking, specialty finance and wealth management reporting units and determined that no impairment existed 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 June 30, 2023, 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 June 30, 2023 is as follows: (In thousands) June 30, December 31, June 30, Community banking segment: Core deposit intangibles with finite lives: Gross carrying amount $ 55,206 $ 55,206 $ 55,206 Accumulated amortization (44,432) (42,501) (40,404) Net carrying amount $ 10,774 $ 12,705 $ 14,802 Trademark with indefinite lives: Carrying amount 5,800 5,800 5,800 Total net carrying amount $ 16,574 $ 18,505 $ 20,602 Specialty finance segment: Customer list intangibles with finite lives: Gross carrying amount $ 1,963 $ 1,962 $ 1,966 Accumulated amortization (1,813) (1,785) (1,756) Net carrying amount $ 150 $ 177 $ 210 Wealth management segment: Customer list and other intangibles with finite lives: Gross carrying amount $ 26,630 $ 20,430 $ 20,430 Accumulated amortization (17,701) (16,926) (16,124) Net carrying amount $ 8,929 $ 3,504 $ 4,306 Total acquisition-related intangible assets: Gross carrying amount $ 89,599 $ 83,398 $ 83,402 Accumulated amortization (63,946) (61,212) (58,284) Total other acquisition-related intangible assets, net $ 25,653 $ 22,186 $ 25,118 Estimated amortization Actual in six months ended June 30, 2023 $ 2,734 Estimated remaining in 2023 2,769 Estimated—2024 4,301 Estimated—2025 3,482 Estimated—2026 2,772 Estimated—2027 2,157 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 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 $2.7 million and $3.2 million for the six months ended June 30, 2023 and 2022, respectively.

Mortgage Servicing Rights ("MSR

Mortgage Servicing Rights ("MSRs")	6 Months Ended
Mortgage Servicing Rights ("MSRs")	Jun. 30, 2023
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 Six Months Ended June 30, June 30, June 30, June 30, (In thousands) 2023 2022 2023 2022 Fair value at beginning of the period $ 224,470 199,146 $ 230,225 $ 147,571 Additions from loans sold with servicing retained 8,720 11,210 13,827 25,611 Servicing rights sold (30,170) — (30,170) — Estimate of changes in fair value due to: Early buyout options (“EBO”) exercised — (1) — (176) Payoffs and paydowns (5,043) (6,838) (8,952) (12,854) Changes in valuation inputs or assumptions 2,715 9,147 (4,238) 52,512 Fair value at end of the period $ 200,692 $ 212,664 $ 200,692 $ 212,664 Unpaid principal balance of mortgage loans serviced for others $ 11,752,223 $ 13,643,623 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 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 June 30, 2023, see Note (14) “Derivative Financial Instruments” in Item 1 of this report. There were no such options or swaps outstanding as of June 30, 2022.

Deposits

Deposits	6 Months Ended
Deposits	Jun. 30, 2023
Deposits [Abstract]
Deposits	Deposits The following table is a summary of deposits as of the dates shown: (Dollars in thousands) June 30, December 31, June 30, Balance: Non-interest-bearing $ 10,604,915 $ 12,668,160 $ 13,855,844 NOW and interest-bearing demand deposits 5,814,836 5,591,986 5,918,908 Wealth management deposits 1,417,984 2,463,833 3,182,407 Money market 14,523,124 12,886,795 12,273,350 Savings 5,321,578 4,556,635 3,686,596 Time certificates of deposit 6,356,270 4,735,135 3,676,221 Total deposits $ 44,038,707 $ 42,902,544 $ 42,593,326 Mix: Non-interest-bearing 24 % 30 % 33 % NOW and interest-bearing demand deposits 13 13 13 Wealth management deposits 3 5 7 Money market 33 30 29 Savings 12 11 9 Time certificates of deposit 15 11 9 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.

FHLB Advances, Other Borrowings

FHLB Advances, Other Borrowings and Subordinated Notes	6 Months Ended
FHLB Advances, Other Borrowings and Subordinated Notes	Jun. 30, 2023
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) June 30, December 31, June 30, FHLB advances $ 2,026,071 $ 2,316,071 $ 1,166,071 Other borrowings: Notes payable 185,539 199,793 69,619 Short-term borrowings 17,773 17,612 16,418 Secured borrowings 326,348 317,942 334,467 Other 135,559 61,267 62,283 Total other borrowings 665,219 596,614 482,787 Subordinated notes 437,628 437,392 437,162 Total FHLB advances, other borrowings and subordinated notes $ 3,128,918 $ 3,350,077 $ 2,086,020 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 2022 Form 10-K. Notes Payable Notes payable balances represent the balances on a credit agreement (as amended, the “Credit Agreement”) with certain unaffiliated banks. The Credit Agreement consisted of a $150.0 million term loan facility and a $100.0 million revolving credit facility. On December 12, 2022, the Company entered into an amendment and restatement of the Credit Agreement pursuant to the Amended and Restated Credit Agreement dated as of December 12, 2022, among the Company and the unaffiliated banks named therein as lenders and agents (the “Amended and Restated Credit Agreement”). The Amended and Restated Credit Agreement provides for, among other things, an increase to the term loan facility to $200.0 million. In connection with the entry into the Amended and Restated Credit Agreement, the outstanding term loan under the existing Credit Agreement was paid in full pursuant to the terms thereof. On, July 17, 2023 the Company entered into an amendment (the “Amendment”) to the Amended and Restated Credit Agreement dated December 12, 2022. The Amendment designates 450 Northbrook Trust, a subsidiary of the Company, as a “Specified Subsidiary” under the Amended and Restated Credit Agreement, which excludes it from the scope of certain provisions of the burdensome agreements covenant in the Amended and Restated Credit Agreement. At June 30, 2023, the outstanding principal balance under the term loan facility was $185.5 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 June 30, 2023, 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 $16.3 million at June 30, 2023 compared to $17.6 million and $16.4 million at December 31, 2022 and June 30, 2022, respectively. As of June 30, 2023, the Company had pledged securities related to its customer balances in sweep accounts of $17.8 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 June 30, 2023 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 $ 17,819 Excess collateral 1,546 Securities sold under repurchase agreements $ 16,273 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 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 June 30, 2023, the translated balance of the secured borrowings totaled $317.1 million compared to $309.7 million at December 31, 2022 and $326.0 million at June 30, 2022. The interest rate under the receivables purchase agreement is the Canadian Commercial Paper Rate plus 0.825%. The remaining $9.2 million within secured borrowings at June 30, 2023 represents 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

Junior Subordinated Debentures

Junior Subordinated Debentures	6 Months Ended
Junior Subordinated Debentures	Jun. 30, 2023
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 June 30, 2023. The junior subordinated debentures represent the par value of the obligations owed to the Trusts. (Dollars in thousands) Common Trust Junior Rate Contractual Rate at 6/30/2023 Issue Maturity Earliest Wintrust Capital Trust III $ 774 $ 25,000 $ 25,774 L+3.25 8.51 % 04/2003 04/2033 04/2008 Wintrust Statutory Trust IV 619 20,000 20,619 L+2.80 8.34 % 12/2003 12/2033 12/2008 Wintrust Statutory Trust V 1,238 40,000 41,238 L+2.60 8.14 % 05/2004 05/2034 06/2009 Wintrust Capital Trust VII 1,550 50,000 51,550 L+1.95 7.50 % 12/2004 03/2035 03/2010 Wintrust Capital Trust VIII 1,238 25,000 26,238 L+1.45 6.99 % 08/2005 09/2035 09/2010 Wintrust Capital Trust IX 1,547 50,000 51,547 L+1.63 7.18 % 09/2006 09/2036 09/2011 Northview Capital Trust I 186 6,000 6,186 L+3.00 8.30 % 08/2003 11/2033 08/2008 Town Bankshares Capital Trust I 186 6,000 6,186 L+3.00 8.30 % 08/2003 11/2033 08/2008 First Northwest Capital Trust I 155 5,000 5,155 L+3.00 8.54 % 05/2004 05/2034 05/2009 Suburban Illinois Capital Trust II 464 15,000 15,464 L+1.75 7.30 % 12/2006 12/2036 12/2011 Community Financial Shares Statutory Trust II 109 3,500 3,609 L+1.62 7.17 % 06/2007 09/2037 06/2012 Total $ 253,566 7.70 % The junior subordinated debentures totaled $253.6 million at June 30, 2023, December 31, 2022 and June 30, 2022. The interest rates on the variable rate junior subordinated debentures are based on the three-month London Interbank Offered Rate (“LIBOR”) and reset on a quarterly basis. At June 30, 2023, the weighted average contractual interest rate on the junior subordinated debentures was 7.70%. Under the Adjustable Interest Rate (LIBOR) Act (“AIRLA”) and Part 253 of Regulation ZZ (Rule 253), after June 30, 2023, the interest rate on the junior subordinated debentures will, by operation of law, change their base rate from USD LIBOR to Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) of the same tenor, plus an applicable tenor spread adjustment. CME Term SOFR is an indicative, forward-looking measurement of daily overnight SOFR. CME Term SOFR is published by CME Group Inc., as administrator of that rate. The calculation agent for any series of the junior subordinated debentures may also make additional administrative conforming changes to the terms of that series of the junior subordinated debentures under AIRLA and Rule 253.

Segment Information

Segment Information	6 Months Ended
Segment Information	Jun. 30, 2023
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” 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 2022 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 % Change in (Dollars in thousands) June 30, June 30, Net interest income: Community Banking $ 346,232 $ 261,726 $ 84,506 32 % Specialty Finance 84,993 58,718 26,275 45 Wealth Management 7,404 9,534 (2,130) (22) Total Operating Segments 438,629 329,978 108,651 33 Intersegment Eliminations 8,908 7,826 1,082 14 Consolidated net interest income $ 447,537 $ 337,804 $ 109,733 32 % Provision for credit losses: Community Banking $ 26,713 $ 20,225 $ 6,488 32 % Specialty Finance 1,801 192 1,609 NM Wealth Management — — — — Total Operating Segments 28,514 20,417 8,097 40 Intersegment Eliminations — — — — Consolidated provision for credit losses $ 28,514 $ 20,417 $ 8,097 40 % Non-interest income: Community Banking $ 68,130 $ 62,714 $ 5,416 9 % Specialty Finance 31,737 24,992 6,745 27 Wealth Management 33,391 30,226 3,165 10 Total Operating Segments 133,258 117,932 15,326 13 Intersegment Eliminations (20,228) (14,990) (5,238) 35 Consolidated non-interest income $ 113,030 $ 102,942 $ 10,088 10 % Net revenue: Community Banking $ 414,362 $ 324,440 $ 89,922 28 % Specialty Finance 116,730 83,710 33,020 39 Wealth Management 40,795 39,760 1,035 3 Total Operating Segments 571,887 447,910 123,977 28 Intersegment Eliminations (11,320) (7,164) (4,156) 58 Consolidated net revenue $ 560,567 $ 440,746 $ 119,821 27 % Segment profit: Community Banking $ 102,517 $ 54,647 $ 47,870 88 % Specialty Finance 46,402 30,558 15,844 52 Wealth Management 5,831 9,308 (3,477) (37) Consolidated net income $ 154,750 $ 94,513 $ 60,237 64 % Segment assets: Community Banking $ 42,452,673 $ 40,098,458 $ 2,354,215 6 % Specialty Finance 10,549,819 9,207,215 1,342,604 15 Wealth Management 1,283,684 1,663,659 (379,975) (23) Consolidated total assets $ 54,286,176 $ 50,969,332 $ 3,316,844 7 % NM - Not meaningful Six Months Ended $ Change in % Change in (Dollars in thousands) June 30, June 30, Net interest income: Community Banking $ 716,080 $ 490,341 $ 225,739 46 % Specialty Finance 155,344 114,088 41,256 36 Wealth Management 16,359 17,910 (1,551) (9) Total Operating Segments 887,783 622,339 265,444 43 Intersegment Eliminations 17,749 14,759 2,990 20 Consolidated net interest income $ 905,532 $ 637,098 $ 268,434 42 % Provision for credit losses: Community Banking $ 47,812 $ 24,343 $ 23,469 96 % Specialty Finance 3,747 180 3,567 NM Wealth Management — — — — Total Operating Segments 51,559 24,523 27,036 110 Intersegment Eliminations — — — Consolidated provision for credit losses $ 51,559 $ 24,523 $ 27,036 110 % Non-interest income: Community Banking $ 136,863 $ 184,602 $ (47,739) (26) % Specialty Finance 57,527 49,114 8,413 17 Wealth Management 63,688 60,804 2,884 5 Total Operating Segments 258,078 294,520 (36,442) (12) Intersegment Eliminations (37,279) (28,788) (8,491) 29 Consolidated non-interest income $ 220,799 $ 265,732 $ (44,933) (17) % Net revenue: Community Banking $ 852,943 $ 674,943 $ 178,000 26 % Specialty Finance 212,871 163,202 49,669 30 Wealth Management 80,047 78,714 1,333 2 Total Operating Segments 1,145,861 916,859 229,002 25 Intersegment Eliminations (19,530) (14,029) (5,501) 39 Consolidated net revenue $ 1,126,331 $ 902,830 $ 223,501 25 % Segment profit: Community Banking $ 236,749 $ 144,746 $ 92,003 64 % Specialty Finance 83,139 60,162 22,977 38 Wealth Management 15,060 16,996 (1,936) (11) Consolidated net income $ 334,948 $ 221,904 $ 113,044 51 % NM - Not meaningful

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
Derivative Financial Instruments	Jun. 30, 2023
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 June 30, 2023, December 31, 2022 and June 30, 2022: Derivative Assets Derivative Liabilities (In thousands) June 30, December 31, June 30, June 30, December 31, June 30, Derivatives designated as hedging instruments under ASC 815: Interest rate derivatives designated as Cash Flow Hedges $ 2,154 $ — $ 151 $ 121,347 $ 58,198 $ — Interest rate derivatives designated as Fair Value Hedges 16,255 16,768 10,396 — — 128 Total derivatives designated as hedging instruments under ASC 815 $ 18,409 $ 16,768 $ 10,547 $ 121,347 $ 58,198 $ 128 Derivatives not designated as hedging instruments under ASC 815: Interest rate derivatives $ 261,205 $ 269,670 $ 165,209 $ 261,066 $ 271,109 $ 164,979 Interest rate lock commitments 3,487 1,711 6,649 172 58 173 Forward commitments to sell mortgage loans 2,769 220 906 38 414 1,963 Commodity forward contracts 434 257 — 214 162 — Foreign exchange contracts 8,444 8,222 614 8,335 8,137 614 Total derivatives not designated as hedging instruments under ASC 815 $ 276,339 $ 280,080 $ 173,378 $ 269,825 $ 279,880 $ 167,729 Total Derivatives $ 294,748 $ 296,848 $ 183,925 $ 391,172 $ 338,078 $ 167,857 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 price or in which the interest rate index specified in the contract is below the agreed upon floor strike price at the end of each period. As of June 30, 2023, the Company had various interest rate collar and swap derivatives designated as cash flow hedges of variable rate loans and various interest rate swap derivatives designated as cash flow hedges of variable rate deposits. 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 or interest expense as interest payments are made on such variable rate deposits. 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 June 30, 2023: June 30, 2023 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 $ (29,186) Buy 2.750% floor, sell 4.320% cap; matures October 2026 500,000 (6,375) Buy 2.000% floor, sell 3.450% cap; matures September 2027 1,250,000 (45,700) Interest Rate Swaps at 1-month CME term SOFR: Fixed 3.748%; matures December 2025 250,000 (4,422) Fixed 3.759%; matures December 2025 250,000 (4,356) Fixed 3.680%; matures February 2026 250,000 (4,762) Fixed 4.176%; matures March 2026 250,000 (1,563) Fixed 3.915%; matures March 2026 250,000 (3,211) Fixed 4.450%; matures July 2026 250,000 1,046 Fixed 3.515%, matures December 2026 250,000 (5,208) Fixed 3.512%; matures December 2026 250,000 (5,233) Fixed 3.453%; matures February 2027 250,000 (5,654) Fixed 4.150%; matures July 2027 250,000 1,108 Fixed 3.748%; matures March 2028 250,000 (1,652) Fixed 3.526%; matures March 2028 250,000 (4,025) Total Cash Flow Hedges $ 6,000,000 $ (119,193) 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 the term 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 the term 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 Six Months Ended (In thousands) June 30, June 30, June 30, June 30, Unrealized gain at beginning of period $ 44,692 $ 76,389 $ 10,026 $ 36,908 Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings 14,092 1,012 17,664 6,365 Amount of gain recognized in other comprehensive income or loss (120,523) 1,363 (89,429) 35,491 Unrealized gain at end of period $ (61,739) $ 78,764 $ (61,739) $ 78,764 As of June 30, 2023, the Company estimated that during the next 12 months $68.9 million will be reclassified from accumulated other comprehensive income or loss as a decrease to net interest income. Such estimate consists of $17.6 million reclassified as a reduction to interest expense on the terminated cash flow hedges discussed above and $86.5 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 June 30, 2023, the Company had 13 interest rate swaps with an aggregate notional amount of $204.1 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 June 30, 2023: June 30, 2023 (In thousands) 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 $ 187,102 $ (16,202) $ (94) Available-for-sale debt securities 828 (25) — 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 Three Months Ended Six Months Ended June 30, 2023 June 30, 2023 Interest rate swaps Interest and fees on loans $ (7) $ 2 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 June 30, 2023, there were no interest rate caps outstanding that were designed to act as an economic hedge. During 2022, the Company terminated an interest rate cap derivative contract related to LIBOR that was not designated as an accounting hedge with a total notional value of $1.0 billion. 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 June 30, 2023 and December 31, 2022, the Company had interest rate derivative transactions with an aggregate notional amount of approximately $11.2 billion and $9.6 billion, respectively, (all interest rate swaps and caps with customers and third parties) related to this program. At June 30, 2023 these interest rate derivatives had maturity dates ranging from July 2023 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 June 30, 2023 and December 31, 2022, the Company had interest rate lock commitments with an aggregate notional amount of approximately $225.1 million and $121.6 million, and forward commitments to sell mortgage loans with an aggregate notional amount of approximately $693.5 million and $321.0 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 June 30, 2023 and December 31, 2022, the Company had commodity derivative transactions with an aggregate notional amount of approximately $6.6 million and $3.6 million, respectively, (all forward contracts with customers and third parties) related to this program. At June 30, 2023, these commodity derivatives had maturity dates ranging from July 2023 to May 2024. 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 June 30, 2023 and December 31, 2022, the Company held foreign currency derivatives with an aggregate notional amount of approximately $205.3 million and $226.2 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 June 30, 2023, December 31, 2022 or June 30, 2022. 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. At both June 30, 2023 and December 31, 2022, the Company held three interest rate derivatives with an aggregate notional value of $190.0 million 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 Six Months Ended Derivative Location in income statement June 30, June 30, June 30, June 30, Interest rate swaps and caps Trading gains, net $ 12 $ 161 $ 812 $ 4,185 Mortgage banking derivatives Mortgage banking revenue 4,791 (7,550) 8,431 (14,919) Commodity contracts Trading gains, net 49 — 226 — Foreign exchange contracts Trading gains, net — — — — Covered call options Fees from covered call options 2,578 1,069 12,969 4,811 Derivative contract held as economic hedge on MSRs Mortgage banking revenue (726) — 220 — 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 June 30, 2023, 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. 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) June 30, December 31, June 30, June 30, December 31, June 30, Gross Amounts Recognized $ 279,614 $ 286,438 $ 175,756 $ 382,413 $ 329,307 $ 165,107 Less: Amounts offset in the Statements of Condition — — — — — — Net amount presented in the Statements of Condition $ 279,614 $ 286,438 $ 175,756 $ 382,413 $ 329,307 $ 165,107 Gross amounts not offset in the Statements of Condition Offsetting Derivative Positions (125,159) (64,100) (6,009) (125,159) (64,100) (6,009) Collateral Posted (145,735) (194,666) (163,412) — — (91) Net Credit Exposure $ 8,720 $ 27,672 $ 6,335 $ 257,254 $ 265,207 $ 159,007

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	6 Months Ended
Fair Values of Assets and Liabilities	Jun. 30, 2023
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 June 30, 2023, the Company classified $114.2 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 second quarter of 2023, 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 June 30, 2023 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 June 30, 2023, the Company classified $29.4 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 June 30, 2023 was 6.50%. 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 0.42% with credit loss discount ranging from 0%-13% at June 30, 2023. 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 June 30, 2023, the Company classified $61.1 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 June 30, 2023 was 6.57%. 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 7.01% at June 30, 2023. 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 6.2 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 0.89% with credit loss discounts ranging from 0%-14% at June 30, 2023. 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 June 30, 2023, the Company classified $200.7 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at June 30, 2023 was 10.50% with discount rates applied ranging from 2%-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%-100% or a weighted average prepayment speed of 7.01%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $77 and $405, 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”)” 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 June 30, 2023, the Company classified $3.5 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 June 30, 2023 was 83.16% with pull-through rates applied ranging from 13% 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: June 30, 2023 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 74,275 — 74,275 — Municipal 167,411 — 53,256 114,155 Corporate notes 72,060 — 72,060 — Mortgage-backed 3,178,735 — 3,178,735 — Trading account securities 3,027 — 3,027 — Equity securities with readily determinable fair value 116,275 108,209 8,066 — Mortgage loans held-for-sale 338,728 — 309,322 29,406 Loans held-for-investment 193,953 — 132,830 61,123 MSRs 200,692 — — 200,692 Nonqualified deferred compensation assets 14,796 — 14,796 — Derivative assets 294,748 — 291,261 3,487 Total $ 4,654,700 $ 108,209 $ 4,137,628 $ 408,863 Derivative liabilities $ 391,172 $ — $ 391,172 $ — December 31, 2022 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ 14,948 $ 14,948 $ — $ — U.S. government agencies 74,222 — 74,222 — Municipal 168,655 — 51,118 117,537 Corporate notes 85,705 — 85,705 — Mortgage-backed 2,899,487 — 2,899,487 — Trading account securities 1,127 — 1,127 — Equity securities with readily determinable fair value 110,365 102,299 8,066 — Mortgage loans held-for-sale 299,935 — 251,280 48,655 Loans held-for-investment 179,932 — 95,767 84,165 MSRs 230,225 — — 230,225 Nonqualified deferred compensation assets 13,899 — 13,899 — Derivative assets 296,848 — 295,137 1,711 Total $ 4,375,348 $ 117,247 $ 3,775,808 $ 482,293 Derivative liabilities $ 338,078 $ — $ 338,078 $ — June 30, 2022 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 48,087 — 48,087 — Municipal 166,705 — 53,220 113,485 Corporate notes 89,813 — 89,813 — Mortgage-backed 2,665,516 — 2,665,516 — Trading account securities 1,010 — 1,010 — Equity securities with readily determinable fair value 93,295 85,229 8,066 — Mortgage loans held-for-sale 513,232 — 424,269 88,963 Loans held-for-investment 122,757 — 37,959 84,798 MSRs 212,664 — — 212,664 Nonqualified deferred compensation assets 13,936 — 13,936 — Derivative assets 183,925 — 177,276 6,649 Total $ 4,110,940 $ 85,229 $ 3,519,152 $ 506,559 Derivative liabilities $ 167,857 $ — $ 167,857 $ — The aggregate remaining contractual principal balance outstanding as of June 30, 2023, December 31, 2022 and June 30, 2022 for mortgage loans held-for-sale measured at fair value under ASC 825 was $345.7 million, $308.9 million and $510.7 million, respectively, while the aggregate fair value of mortgage loans held-for-sale was $338.7 million, $299.9 million and $513.2 million, for the same respective periods, as shown in the above tables. At June 30, 2023, $582,000 of mortgage loans held-for-sale were classified as nonaccrual as compared to $5.8 million as of December 31, 2022 and $6.0 million as of June 30, 2022. Additionally, there were $29.6 million of loans past due greater than 90 days and still accruing in the mortgage loans held-for-sale portfolio as of June 30, 2023 compared to $44.0 million as of December 31, 2022 and $55.6 million as of June 30, 2022. 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 June 30, 2023, December 31, 2022, and June 30, 2022 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 June 30, 2023, December 31, 2022 and June 30, 2022 for loans held-for-investment measured at fair value under ASC 825 was $196.6 million, $184.0 million and $125.1 million, respectively, while the aggregate fair value of loans held-for-investment was $194.0 million, $179.9 million and $122.8 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 and six months ended June 30, 2023 and 2022 are summarized as follows: Mortgage loans held-for-sale Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at April 1, 2023 $ 112,257 $ 44,250 $ 69,493 $ 224,470 $ 5,356 Total net (losses) gains included in: Net income (1) — 402 (619) 6,392 (1,869) Other comprehensive income or loss (3,161) — — — — Purchases 6,978 — — — — Issuances — — — — — Sales — — — (30,170) — Settlements (1,919) (23,973) (16,593) — — Net transfers into Level 3 — 8,727 8,842 — — Balance at June 30, 2023 $ 114,155 $ 29,406 $ 61,123 $ 200,692 $ 3,487 (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. Mortgage loans held-for-sale Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at April 1, 2022 $ 100,401 $ — $ 44,464 $ 199,146 $ 3,447 Total net (losses) gains included in: Net income (1) — (2,900) (1,775) 13,518 3,202 Other comprehensive income or loss (685) — — — — Purchases 15,497 — — — — Issuances — — — — — Sales — — — — — Settlements (1,728) — (7,231) — — Net transfers into Level 3 — 91,863 49,340 — — Balance at June 30, 2022 $ 113,485 $ 88,963 $ 84,798 $ 212,664 $ 6,649 Mortgage loans held-for-sale Loans held-for- investment Mortgage 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) — 868 (255) 637 1,776 Other comprehensive income or loss (4,823) — — — — Purchases 11,396 — — — — Issuances — — — — — Sales — — — (30,170) — Settlements (9,955) (42,592) (36,915) — — Net transfers into Level 3 — 22,475 14,128 — — Balance at June 30, 2023 $ 114,155 $ 29,406 $ 61,123 $ 200,692 $ 3,487 Mortgage loans held-for-sale Loans held-for- investment Mortgage Derivative Assets (In thousands) Municipal Balance at January 1, 2022 $ 105,687 $ — $ 15,891 $ 147,571 $ 10,560 Total net (losses) gains included in: Net income (1) — (2,900) (2,547) 65,093 (3,911) Other comprehensive income or loss (6,134) — — — — Purchases 16,743 — — — — Issuances — — — — — Sales — — — — — Settlements (2,811) — (8,898) — — Net transfers into Level 3 — 91,863 80,352 — — Balance at June 30, 2022 $ 113,485 $ 88,963 $ 84,798 $ 212,664 $ 6,649 (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 June 30, 2023: June 30, 2023 Three Months Ended June 30, 2023 Fair Value Losses Recognized, net Six Months Ended June 30, 2023 Fair Value Losses Recognized, net (In thousands) Total Level 1 Level 2 Level 3 Individually assessed loans - foreclosure probable and collateral-dependent $ 73,804 $ — $ — $ 73,804 $ 11,635 $ 14,136 Other real estate owned (1) 11,586 — — 11,586 — 104 Total $ 85,390 $ — $ — $ 85,390 $ 11,635 $ 14,240 (1) Fair value losses recognized, net 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”. At June 30, 2023, the Company had $73.8 million of individually assessed loans classified as Level 3. All of the $73.8 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 June 30, 2023, the Company had $11.6 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 June 30, 2023 were as follows: (Dollars in thousands) Fair Value Valuation Methodology Significant Unobservable Input Range Weighted Impact to valuation Measured at fair value on a recurring basis: Municipal securities $ 114,155 Bond pricing Equivalent rating BBB-AA+ N/A Increase Mortgage loans held-for-sale 29,406 Discounted cash flows Discount rate 6.50% 6.50% Decrease Credit discount 0% - 13% 0.42% Decrease Loans held-for-investment 61,123 Discounted cash flows Discount rate 6.50% - 7.25% 6.57% Decrease Credit discount 0% - 14% 0.89% Decrease Constant prepayment rate (CPR) - current loans 7.01% 7.01% Decrease Average life - delinquent loans (in years) 2.7 years - 10.5 years 6.2 years Decrease MSRs 200,692 Discounted cash flows Discount rate 2% - 21% 10.50% Decrease Constant prepayment rate (CPR) 0% - 100% 7.01% Decrease Cost of servicing $70 - $200 $ 77 Decrease Cost of servicing - delinquent $200 - 1,000 $ 405 Decrease Derivatives 3,487 Discounted cash flows Pull-through rate 13% - 100% 83.16 % Increase Measured at fair value on a non-recurring basis: Individually assessed loans - foreclosure probable and collateral-dependent 73,804 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease Other real estate owned 11,586 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 June 30, 2023 At December 31, 2022 At June 30, 2022 Carrying Fair Carrying Fair Carrying Fair (In thousands) Value Value Value Value Value Value Financial Assets: Cash and cash equivalents $ 513,917 $ 513,917 $ 490,966 $ 490,966 $ 498,947 $ 498,947 Securities sold under agreements to repurchase with original maturities exceeding three months — — — — 475,000 475,000 Interest-bearing deposits with banks 2,163,708 2,163,708 1,988,719 1,988,719 3,266,541 3,266,541 Available-for-sale securities 3,492,481 3,492,481 3,243,017 3,243,017 2,970,121 2,970,121 Held-to-maturity securities 3,564,473 2,887,891 3,640,567 2,949,821 3,413,469 2,900,269 Trading account securities 3,027 3,027 1,127 1,127 1,010 1,010 Equity securities with readily determinable fair value 116,275 116,275 110,365 110,365 93,295 93,295 FHLB and FRB stock, at cost 195,117 195,117 224,759 224,759 136,138 136,138 Brokerage customer receivables 15,722 15,722 16,387 16,387 21,527 21,527 Mortgage loans held-for-sale, at fair value 338,728 338,728 299,935 299,935 513,232 513,232 Loans held-for-investment, at fair value 193,953 193,953 179,932 179,932 122,757 122,757 Loans held-for-investment, at amortized cost 40,829,455 40,142,976 39,016,553 38,018,678 36,930,346 36,165,838 Nonqualified deferred compensation assets 14,796 14,796 13,899 13,899 13,936 13,936 Derivative assets 294,748 294,748 296,848 296,848 183,925 183,925 Accrued interest receivable and other 434,553 434,553 379,719 379,719 283,626 283,626 Total financial assets $ 52,170,953 $ 50,807,892 $ 49,902,793 $ 48,214,172 $ 48,923,870 $ 47,646,162 Financial Liabilities Non-maturity deposits $ 37,682,437 $ 37,682,437 $ 38,167,409 $ 38,167,409 $ 38,917,105 $ 38,917,105 Deposits with stated maturities 6,356,270 6,300,161 4,735,135 4,085,058 3,676,221 3,683,452 FHLB advances 2,026,071 2,072,317 2,316,071 2,219,983 1,166,071 1,116,429 Other borrowings 665,219 662,156 596,614 569,342 482,787 483,592 Subordinated notes 437,628 405,762 437,392 409,395 437,162 434,809 Junior subordinated debentures 253,566 253,562 253,566 253,405 253,566 281,085 Derivative liabilities 391,172 391,172 338,078 338,078 167,857 167,857 Accrued interest payable 45,359 45,359 22,176 22,176 8,233 8,233 Total financial liabilities $ 47,857,722 $ 47,812,926 $ 46,866,441 $ 46,064,846 $ 45,109,002 $ 45,092,562 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) and term. For variable-rate loans that reprice frequently, estimated fair values are based on carrying values. The fair value of residential loans is based on secondary market sources for securities backed by similar loans, adjusted for differences in loan characteristics. The fair value for other fixed rate 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. In accordance with ASC 820, the Company has categorized loans as a Level 3 fair value measurement. Deposits with stated maturities. The fair value of 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 deposits of similar remaining maturities. In accordance with ASC 820, the Company has categorized deposits with stated maturities as a Level 3 fair value measurement. FHLB advances. The fair value of FHLB advances is obtained from the FHLB which uses 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.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	6 Months Ended
Stock-Based Compensation Plans	Jun. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans As of June 30, 2023, approximately 1.2 million 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 2022 Form 10-K. Stock-based compensation expense recognized in the Consolidated Statements of Income was $8.1 million in the second quarter of 2023 and $7.0 million in the second quarter of 2022, and $16.4 million and $14.9 million in the six months ended June 30, 2023 and 2022, respectively. A summary of the Plans’ stock option activity for the six months ended June 30, 2023 and June 30, 2022 is presented below: Stock Options Common Weighted 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 June 30, 2023 13,875 $ 42.18 4.5 $ 422 Exercisable at June 30, 2023 13,875 $ 42.18 4.5 $ 422 Stock Options Common Weighted Remaining Contractual Term (1) Intrinsic Value (2) (in thousands) Outstanding at January 1, 2022 193,447 $ 41.62 Granted — — Exercised (83,507) 42.39 Forfeited or canceled (1,430) 40.87 Outstanding at June 30, 2022 108,510 $ 41.04 1.2 $ 4,244 Exercisable at June 30, 2022 108,510 $ 41.04 1.2 $ 4,244 (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 six months ended June 30, 2023 and June 30, 2022, was $2.5 million and $4.7 million, respectively. Cash received from option exercises under the Plans for the six months ended June 30, 2023 and June 30, 2022 was $2.2 million and $3.5 million, respectively. A summary of the Plans’ restricted share activity for the six months ended June 30, 2023 and June 30, 2022 is presented below: Six months ended June 30, 2023 Six months ended June 30, 2022 Restricted Shares Common Weighted Common Weighted Outstanding at January 1 610,155 $ 73.21 476,813 $ 61.33 Granted 260,173 88.29 204,043 96.95 Vested and issued (103,161) 64.08 (56,380) 64.44 Forfeited or canceled (7,638) 82.82 (9,722) 72.87 Outstanding at June 30 759,529 $ 79.52 614,754 $ 72.68 Vested, but deferred, at June 30 98,247 $ 53.35 96,400 $ 52.83 A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the six months ended June 30, 2023 and June 30, 2022 is presented below: Six months ended June 30, 2023 Six months ended June 30, 2022 Performance-based Stock Common Weighted Common Weighted Outstanding at January 1 545,379 $ 70.30 557,255 $ 62.94 Granted 186,313 92.45 160,326 97.16 Added by performance factor at vesting 23,161 63.64 — — Vested and issued (178,203) 63.64 — — Forfeited or canceled (7,909) 82.73 (163,803) 71.44 Outstanding at June 30 568,741 $ 79.20 553,778 $ 70.34 Vested, but deferred, at June 30 36,438 $ 44.99 35,424 $ 44.04

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income or Loss and Earnings Per Share	6 Months Ended
	Jun. 30, 2023
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 Accumulated Accumulated Total Balance at April 1, 2023 $ (351,995) $ 32,809 $ (48,250) $ (367,436) Other comprehensive (loss) income during the period, net of tax, before reclassifications (33,909) (88,405) 5,344 (116,970) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (1) 10,337 — 10,336 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 (20) — — (20) Net other comprehensive (loss) income during the period, net of tax $ (33,930) $ (78,068) $ 5,344 $ (106,654) Balance at June 30, 2023 $ (385,925) $ (45,259) $ (42,906) $ (474,090) Balance at January 1, 2023 $ (386,057) $ 7,381 $ (48,960) $ (427,636) Other comprehensive income (loss) during the period, net of tax, before reclassifications 594 (65,597) 6,054 (58,949) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (410) 12,957 — 12,547 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 (52) — — (52) Net other comprehensive income (loss) during the period, net of tax $ 132 $ (52,640) $ 6,054 $ (46,454) Balance at June 30, 2023 $ (385,925) $ (45,259) $ (42,906) $ (474,090) Balance at April 1, 2022 $ (142,604) $ 56,060 $ (29,455) $ (115,999) Other comprehensive (loss) income during the period, net of tax, before reclassifications (122,154) 999 (6,593) (127,748) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax — 742 — 742 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 (loss) income during the period, net of tax $ (122,186) $ 1,741 $ (6,593) $ (127,038) Balance at June 30, 2022 $ (264,790) $ 57,801 $ (36,048) $ (243,037) Balance at January 1, 2022 $ 8,724 $ 27,111 $ (31,743) $ 4,092 Other comprehensive (loss) income during the period, net of tax, before reclassifications (273,268) 26,022 (4,305) (251,551) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (183) 4,668 — 4,485 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 (63) — — (63) Net other comprehensive (loss) income during the period, net of tax $ (273,514) $ 30,690 $ (4,305) $ (247,129) Balance at June 30, 2022 $ (264,790) $ 57,801 $ (36,048) $ (243,037) (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 Six Months Ended Impacted Line on the June 30, June 30, 2023 2022 2023 2022 Accumulated unrealized gains on securities Gains included in net income $ 2 $ — $ 562 $ 250 Gains (losses) on investment securities, net 2 — 562 250 Income before taxes Tax effect (1) — (152) (67) Income tax expense Net of tax $ 1 $ — $ 410 $ 183 Net income Accumulated unrealized gains on derivative instruments Amount reclassified to interest income on loans $ 18,661 $ — $ 27,733 $ — Interest on Loans Amount reclassified to interest expense on deposits $ (4,657) $ 657 $ (10,245) $ 5,476 Interest on deposits Amount reclassified to interest expense on other borrowings 88 355 176 889 Interest on other borrowings (14,092) (1,012) (17,664) (6,365) Income before taxes Tax effect 3,755 270 4,707 1,697 Income tax expense Net of tax $ (10,337) $ (742) $ (12,957) $ (4,668) 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 Six Months Ended (In thousands, except per share data) June 30, June 30, June 30, June 30, Net income $ 154,750 $ 94,513 $ 334,948 $ 221,904 Less: Preferred stock dividends 6,991 6,991 13,982 13,982 Net income applicable to common shares (A) $ 147,759 $ 87,522 $ 320,966 $ 207,922 Weighted average common shares outstanding (B) 61,192 58,063 61,072 57,632 Effect of dilutive potential common shares Common stock equivalents 902 775 933 823 Weighted average common shares and effect of dilutive potential common shares (C) 62,094 58,838 62,005 58,455 Net income per common share: Basic (A/B) $ 2.41 $ 1.51 $ 5.26 $ 3.61 Diluted (A/C) $ 2.38 $ 1.49 $ 5.18 $ 3.56 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 2023 meeting of the board of directors of the Company (the “Board of Directors”), a quarterly cash dividend of $0.40 per share ($1.60 on an annualized basis) was declared. It was paid on February 23, 2023 to shareholders of record as of February 9, 2023. At the April

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net income	$ 154,750	$ 94,513	$ 334,948	$ 221,904

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2023
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

Recent Accounting Developments

Recent Accounting Developments (Policies)	6 Months Ended
Recent Accounting Developments (Policies)	Jun. 30, 2023
Accounting Policies [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, 2022 (“2022 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 2022 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.
Recent Accounting Developments	Business Combinations In October 2021, the FASB issued ASU No. 2021-08, “Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers,” which clarifies diversity in practice related to recognition and measurement of contract assets and liabilities related to revenue contracts with customers which are acquired in a business combination by aligning business combination accounting with the subsequent accounting for contract assets and liabilities by requiring entities to apply ASC Topic 606, Revenue from Contracts with Customers, in order to recognize and measure deferred revenue in a business combination. The guidance also creates an exception to the general recognition and measurement principle in ASC Topic 805, Business Combinations, under which such amounts are recognized by the acquirer at fair value on the acquisition date by providing two practical expedients for acquirers. The Company adopted ASU No. 2021-08 as of January 1, 2023. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Fair Value Hedging - Portfolio Layer Method In March 2022, the FASB issued ASU No. 2022-01, “Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method” which expands the current last-of-layer method by allowing multiple hedged layers to be designated for a single closed portfolio of financial assets or one or more beneficial interests secured by a portfolio of financial instruments. The Company adopted ASU No. 2022-01 as of January 1, 2023. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Troubled Debt Restructurings and Vintage Disclosures In March 2022, the FASB issued ASU No. 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures” which eliminates the separate recognition and measurement guidance for troubled debt restructurings (“TDRs”) by creditors, while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty, and requiring entities to disclose current-period gross write-offs by year of origination for certain financing receivables and net investments in leases. The Company adopted ASU No. 2022-02 as of January 1, 2023. Guidance was adopted under a modified retrospective approach and, at January 1, 2023, the Company recognized a cumulative-effect adjustment to the allowance for loan losses of $741,000 representing the change in methodology of estimating expected credit losses for loans previously classified as TDRs. This amount was a positive adjustment to the allowance for loan losses, presented separately on the Company’s Consolidated Statements of Condition, with an offsetting negative adjustment recorded directly to retained earnings, net of taxes. Fair Value Measurement - Equity Securities with Contractual Sale Restrictions In June 2022, the FASB issued ASU No. 2022-03, “Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions” which clarifies the guidance in ASC 820 when measuring the fair value of an equity security subject to contractual restrictions that prohibit the sale of an equity security, and also requires specific disclosures related to these types of securities. This guidance is effective for fiscal years beginning after December 15, 2023, including interim periods therein, and is to be applied under a prospective approach. Early adoption is permitted. The Company does not expect this guidance to have a material impact on the Company’s consolidated financial statements. Legislation Issued Related to Stock Repurchases On August 16, 2022, the Inflation Reduction Act of 2022 (the “IRA”) was signed by the President of the United States. Among other things, the IRA imposes a 1% excise tax on the fair market value of stock repurchased after December 31, 2022. With certain exceptions, the value of stock repurchased is determined net of stock issued in the year, including shares issued pursuant to compensatory arrangements. This new legislation did not have a material impact on the Company's consolidated financial statements. Equity Method and Joint Ventures - Investments in Tax Credit Structures
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.

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
Investment Securities (Tables)	Jun. 30, 2023
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: June 30, 2023 (In thousands) Amortized Gross Gross Fair Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 80,000 — (5,725) 74,275 Municipal 173,540 102 (6,231) 167,411 Corporate notes: Financial issuers 83,995 — (12,920) 71,075 Other 1,000 — (15) 985 Mortgage-backed: (1) Mortgage-backed securities 3,585,943 — (483,659) 3,102,284 Collateralized mortgage obligations 94,373 — (17,922) 76,451 Total available-for-sale securities $ 4,018,851 $ 102 $ (526,472) $ 3,492,481 Held-to-maturity securities U.S. government agencies $ 339,604 $ — $ (71,022) $ 268,582 Municipal 176,128 362 (4,502) 171,988 Mortgage-backed: (1) Mortgage-backed securities 2,832,138 — (574,114) 2,258,024 Collateralized mortgage obligations 159,120 — (23,014) 136,106 Corporate notes 57,889 35 (4,733) 53,191 Total held-to-maturity securities $ 3,564,879 $ 397 $ (677,385) $ 2,887,891 Less: Allowance for credit losses (406) Held-to-maturity securities, net of allowance for credit losses $ 3,564,473 Equity securities with readily determinable fair value $ 120,629 $ 3,711 $ (8,065) $ 116,275 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. December 31, 2022 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ 14,943 $ 5 $ — $ 14,948 U.S. government agencies 80,000 36 (5,814) 74,222 Municipal 173,861 230 (5,436) 168,655 Corporate notes: Financial issuers 93,994 — (9,291) 84,703 Other 1,000 2 — 1,002 Mortgage-backed: (1) Mortgage-backed securities 3,308,494 238 (488,795) 2,819,937 Collateralized mortgage obligations 97,342 — (17,792) 79,550 Total available-for-sale securities $ 3,769,634 $ 511 $ (527,128) $ 3,243,017 Held-to-maturity securities U.S. government agencies $ 339,614 $ — $ (75,293) $ 264,321 Municipal 179,027 477 (4,066) 175,438 Mortgage-backed: (1) Mortgage-backed securities 2,900,031 — (583,682) 2,316,349 Collateralized mortgage obligations 164,151 — (23,322) 140,829 Corporate notes 58,232 — (5,348) 52,884 Total held-to-maturity securities $ 3,641,055 $ 477 $ (691,711) $ 2,949,821 Less: Allowance for credit losses (488) Held-to-maturity securities, net of allowance for credit losses $ 3,640,567 Equity securities with readily determinable fair value $ 115,552 $ 2,935 $ (8,122) $ 110,365 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. June 30, 2022 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 50,000 — (1,913) 48,087 Municipal 170,268 570 (4,133) 166,705 Corporate notes: Financial issuers 93,994 — (5,177) 88,817 Other 1,000 — (4) 996 Mortgage-backed: (1) Mortgage-backed securities 2,915,107 28 (336,517) 2,578,618 Collateralized mortgage obligations 101,132 1 (14,235) 86,898 Total available-for-sale securities $ 3,331,501 $ 599 $ (361,979) $ 2,970,121 Held-to-maturity securities U.S. government agencies $ 294,631 $ — $ (53,222) $ 241,409 Municipal 179,642 1,195 (2,796) 178,041 Mortgage-backed: (1) Mortgage-backed securities 2,719,754 — (438,050) 2,281,704 Collateralized mortgage obligations 170,951 — (16,254) 154,697 Corporate notes 48,574 2 (4,158) 44,418 Total held-to-maturity securities $ 3,413,552 $ 1,197 $ (514,480) $ 2,900,269 Less: Allowance for credit losses (83) Held-to-maturity securities, net of allowance for credit losses $ 3,413,469 Equity securities with readily determinable fair value $ 96,247 $ 3,143 $ (6,095) $ 93,295 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.
Schedule of Investment Securities Portfolio Continuous Unrealized Loss Position, Available for Sale Debt Securities	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 June 30, 2023: Continuous unrealized Continuous unrealized Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale securities U.S. government agencies $ 29,909 $ (91) $ 44,366 $ (5,634) $ 74,275 $ (5,725) Municipal 101,356 (1,988) 53,731 (4,243) 155,087 (6,231) Corporate notes: Financial issuers — — 71,075 (12,920) 71,075 (12,920) Other 985 (15) — — 985 (15) Mortgage-backed: (1) Mortgage-backed securities 876,659 (18,454) 2,225,624 (465,205) 3,102,283 (483,659) Collateralized mortgage obligations 37 (1) 76,414 (17,921) 76,451 (17,922) Total available-for-sale securities $ 1,008,946 $ (20,549) $ 2,471,210 $ (505,923) $ 3,480,156 $ (526,472) (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.
Schedule of Gross Gains and Gross Losses Realized and Proceeds For 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 June 30, Six months ended June 30, (In thousands) 2023 2022 2023 2022 Realized gains on investment securities $ 6 $ 7 $ 611 $ 265 Realized losses on investment securities (6) (7) (51) (14) Net realized gains on investment securities — — 560 251 Unrealized gains on equity securities with readily determinable fair value 684 2 2,974 182 Unrealized losses on equity securities with readily determinable fair value (684) (4,013) (2,136) (6,655) Net unrealized gains (losses) on equity securities with readily determinable fair value — (4,011) 838 (6,473) Upward adjustments of equity securities without readily determinable fair values — — — — Downward adjustments of equity securities without readily determinable fair values — — — — Impairment of equity securities without readily determinable fair values — (3,786) — (4,357) Adjustment and impairment, net, of equity securities without readily determinable fair values — (3,786) — (4,357) Gains (losses) on investment securities, net $ — $ (7,797) $ 1,398 $ (10,579) Proceeds from sales of available-for-sale securities (1) $ — $ — $ — $ — Proceeds from sales of equity securities with readily determinable fair value — — 23,592 18,753 Proceeds from sales and capital distributions of equity securities without readily determinable fair value — 279 67 529 (1) Includes proceeds from available-for-sale securities sold in accordance with written covered call options sold to a third party.
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 June 30, 2023, December 31, 2022 and June 30, 2022, 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: June 30, 2023 December 31, 2022 June 30, 2022 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Available-for-sale securities Due in one year or less $ 93,724 $ 93,137 $ 119,830 $ 119,275 $ 55,058 $ 54,824 Due in one to five years 138,704 126,776 63,644 61,701 75,941 74,559 Due in five to ten years 41,655 36,315 115,734 105,076 115,378 109,492 Due after ten years 64,452 57,518 64,590 57,478 68,885 65,730 Mortgage-backed 3,680,316 3,178,735 3,405,836 2,899,487 3,016,239 2,665,516 Total available-for-sale securities $ 4,018,851 $ 3,492,481 $ 3,769,634 $ 3,243,017 $ 3,331,501 $ 2,970,121 Held-to-maturity securities Due in one year or less $ 2,479 $ 2,475 $ 1,340 $ 1,332 $ 1,457 $ 1,458 Due in one to five years 102,182 96,806 94,705 89,093 84,906 80,705 Due in five to ten years 106,708 105,054 115,318 113,758 105,450 105,491 Due after ten years 362,252 289,426 365,510 288,460 331,034 276,214 Mortgage-backed 2,991,258 2,394,130 3,064,182 2,457,178 2,890,705 2,436,401 Total held-to-maturity securities $ 3,564,879 $ 2,887,891 $ 3,641,055 $ 2,949,821 $ 3,413,552 $ 2,900,269 Less: Allowance for credit losses (406) (488) (83) Held-to-maturity securities, net of allowance for credit losses $ 3,564,473 $ 3,640,567 $ 3,413,469

Loans (Tables)

Loans (Tables)	6 Months Ended
Loans (Tables)	Jun. 30, 2023
Loans and Leases Receivable Disclosure [Abstract]
Summary of Loan Portfolio	The following table shows the Company’s loan portfolio by category as of the dates shown: June 30, December 31, June 30, (Dollars in thousands) 2023 2022 2022 Balance: Commercial $ 12,600,471 $ 12,549,164 $ 12,047,105 Commercial real estate 10,608,811 9,950,947 9,407,205 Home equity 336,974 332,698 325,826 Residential real estate 2,643,240 2,372,383 2,078,907 Premium finance receivables Property and casualty insurance 6,762,698 5,849,459 5,541,447 Life insurance 8,039,273 8,090,998 7,608,433 Consumer and other 31,941 50,836 44,180 Total loans, net of unearned income $ 41,023,408 $ 39,196,485 $ 37,053,103 Mix: Commercial 31 % 32 % 32 % Commercial real estate 26 25 25 Home equity 1 1 1 Residential real estate 6 6 6 Premium finance receivables Property and casualty insurance 16 15 15 Life insurance 20 21 21 Consumer and other 0 0 0 Total loans, net of unearned income 100 % 100 % 100 %

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	6 Months Ended
Allowance for Credit Losses (Tables)	Jun. 30, 2023
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 June 30, 2023, December 31, 2022 and June 30, 2022: As of June 30, 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 $ 40,460 $ 573 $ 22,808 $ 48,970 $ 12,487,660 $ 12,600,471 Commercial real estate Construction and development 12,536 — — 766 1,747,134 1,760,436 Non-construction 5,947 — 1,054 13,452 8,827,922 8,848,375 Home equity 1,361 110 316 601 334,586 336,974 Residential real estate, excluding early buy-out loans 13,652 — 7,243 872 2,433,625 2,455,392 Premium finance receivables Property and casualty insurance loans 19,583 12,785 22,670 32,751 6,674,909 6,762,698 Life insurance loans 6 1,667 3,729 90,117 7,943,754 8,039,273 Consumer and other 4 28 51 146 31,712 31,941 Total loans, net of unearned income, excluding early buy-out loans $ 93,549 $ 15,163 $ 57,871 $ 187,675 $ 40,481,302 $ 40,835,560 Early buy-out loans guaranteed by U.S. government agencies (1) 117 57,728 918 — 129,085 187,848 Total loans, net of unearned income $ 93,666 $ 72,891 $ 58,789 $ 187,675 $ 40,610,387 $ 41,023,408 As of December 31, 2022 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 $ 35,579 $ 462 $ 21,128 $ 56,696 $ 12,435,299 $ 12,549,164 Commercial real estate Construction and development 416 — 361 14,390 1,471,763 1,486,930 Non-construction 5,971 — 1,883 16,285 8,439,878 8,464,017 Home equity 1,487 — — 2,152 329,059 332,698 Residential real estate, excluding early buy-out loans 10,171 — 4,364 9,982 2,183,078 2,207,595 Premium finance receivables Property and casualty insurance loans 13,470 15,841 14,926 40,557 5,764,665 5,849,459 Life insurance loans — 17,245 5,260 68,725 7,999,768 8,090,998 Consumer and other 6 49 18 224 50,539 50,836 Total loans, net of unearned income, excluding early buy-out loans $ 67,100 $ 33,597 $ 47,940 $ 209,011 $ 38,674,049 $ 39,031,697 Early buy-out loans guaranteed by U.S. government agencies (1) 31,279 47,450 984 1,584 83,491 164,788 Total loans, net of unearned income $ 98,379 $ 81,047 $ 48,924 $ 210,595 $ 38,757,540 $ 39,196,485 (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 June 30, 2022 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 $ 32,436 $ — $ 16,789 $ 14,120 $ 11,983,760 $ 12,047,105 Commercial real estate Construction and development 889 — — 1,144 1,504,285 1,506,318 Non-construction 9,829 — 6,771 33,076 7,851,211 7,900,887 Home equity 1,084 — 154 930 323,658 325,826 Residential real estate, excluding early buy-out loans 8,330 — 534 147 1,956,040 1,965,051 Premium finance receivables Property and casualty insurance loans 13,303 6,447 15,299 23,313 5,483,085 5,541,447 Life insurance loans — — 1,796 65,155 7,541,482 7,608,433 Consumer and other 8 25 8 119 44,020 44,180 Total loans, net of unearned income, excluding early buy-out loans $ 65,879 $ 6,472 $ 41,351 $ 138,004 $ 36,687,541 $ 36,939,247 Early buy-out loans guaranteed by U.S. government agencies (1) 23,815 50,314 272 — 39,455 113,856 Total loans, net of unearned income $ 89,694 $ 56,786 $ 41,623 $ 138,004 $ 36,726,996 $ 37,053,103
Summary 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 June 30, 2023: Year of Origination Revolving Total (In thousands) 2023 2022 2021 2020 2019 Prior Revolving to Term Loans Loan Balances: Commercial, industrial and other Pass $ 1,432,042 $ 2,302,642 $ 1,892,615 $ 842,764 $ 536,136 $ 1,091,823 $ 4,016,909 $ 3,612 $ 12,118,543 Special mention 4,953 44,081 72,155 5,689 18,040 6,820 94,418 1,328 247,484 Substandard accrual 3,046 36,007 39,858 3,177 9,549 41,282 60,683 382 193,984 Substandard nonaccrual/doubtful — 1,100 5,576 1,848 27,455 4,316 165 — 40,460 Total commercial, industrial and other $ 1,440,041 $ 2,383,830 $ 2,010,204 $ 853,478 $ 591,180 $ 1,144,241 $ 4,172,175 $ 5,322 $ 12,600,471 Construction and development Pass $ 137,138 $ 623,589 $ 479,051 $ 191,308 $ 110,298 $ 115,876 $ 16,549 $ 367 $ 1,674,176 Special mention — — 1,699 18,420 20,000 14,250 — — 54,369 Substandard accrual — 2,475 — — 3,464 13,416 — — 19,355 Substandard nonaccrual/doubtful — 4,190 — 8,248 — 98 — — 12,536 Total construction and development $ 137,138 $ 630,254 $ 480,750 $ 217,976 $ 133,762 $ 143,640 $ 16,549 $ 367 $ 1,760,436 Non-construction Pass $ 824,864 $ 1,857,052 $ 1,423,876 $ 972,603 $ 788,128 $ 2,549,042 $ 192,636 $ 1,415 $ 8,609,616 Special mention 2,479 5,088 28,536 — 26,357 63,570 1,439 — 127,469 Substandard accrual — 1,431 2,964 21,406 11,012 68,530 — — 105,343 Substandard nonaccrual/doubtful — — 25 — 586 5,336 — — 5,947 Total non-construction $ 827,343 $ 1,863,571 $ 1,455,401 $ 994,009 $ 826,083 $ 2,686,478 $ 194,075 $ 1,415 $ 8,848,375 Home equity Pass $ — $ — $ 63 $ — $ 93 $ 6,207 $ 317,066 $ — $ 323,429 Special mention — 230 — — 59 1,763 2,370 — 4,422 Substandard accrual — — — — — 6,596 1,038 128 7,762 Substandard nonaccrual/doubtful — — 77 115 18 937 98 116 1,361 Total home equity $ — $ 230 $ 140 $ 115 $ 170 $ 15,503 $ 320,572 $ 244 $ 336,974 Residential real estate Early buy-out loans guaranteed by U.S. government agencies $ — $ 24 $ 1,384 $ 9,713 $ 19,125 $ 157,602 $ — $ — $ 187,848 Pass 254,659 827,009 809,152 221,005 116,043 189,815 — — 2,417,683 Special mention 39 3,470 994 1,355 534 5,317 — — 11,709 Substandard accrual 583 2,562 4,377 1,165 260 3,401 — — 12,348 Substandard nonaccrual/doubtful — 912 1,206 744 2,497 8,293 — — 13,652 Total residential real estate $ 255,281 $ 833,977 $ 817,113 $ 233,982 $ 138,459 $ 364,428 $ — $ — $ 2,643,240 Premium finance receivables - property and casualty Pass $ 5,638,768 $ 919,368 $ 26,646 $ 4,012 $ 361 $ — $ — $ — $ 6,589,155 Special mention 130,056 17,308 255 10 — — — — 147,629 Substandard accrual 3,220 3,110 1 — — — — — 6,331 Substandard nonaccrual/doubtful 4,554 14,811 213 5 — — — — 19,583 Total premium finance receivables - property and casualty $ 5,776,598 $ 954,597 $ 27,115 $ 4,027 $ 361 $ — $ — $ — $ 6,762,698 Premium finance receivables - life Pass $ 125,737 $ 584,412 $ 875,181 $ 1,063,640 $ 949,935 $ 4,404,124 $ — $ — $ 8,003,029 Special mention — — 758 6,323 — 29,157 — — 36,238 Substandard accrual — — — — — — — — — Substandard nonaccrual/doubtful — 6 — — — — — — 6 Total premium finance receivables - life $ 125,737 $ 584,418 $ 875,939 $ 1,069,963 $ 949,935 $ 4,433,281 $ — $ — $ 8,039,273 Consumer and other Pass $ 2,344 $ 1,904 $ 1,077 $ 163 $ 399 $ — $ 25,849 $ — $ 31,736 Special mention 2 13 — — 2 127 1 — 145 Substandard accrual — 9 — — — 37 10 — 56 Substandard nonaccrual/doubtful — — 4 — — — — — 4 Total consumer and other $ 2,346 $ 1,926 $ 1,081 $ 163 $ 401 $ 164 $ 25,860 $ — $ 31,941 Total loans Early buy-out loans guaranteed by U.S. government agencies $ — $ 24 $ 1,384 $ 9,713 $ 19,125 $ 157,602 $ — $ — $ 187,848 Pass 8,415,552 7,115,976 5,507,661 3,295,495 2,501,393 8,356,887 4,569,009 5,394 39,767,367 Special mention 137,529 70,190 104,397 31,797 64,992 121,004 98,228 1,328 629,465 Substandard accrual 6,849 45,594 47,200 25,748 24,285 133,262 61,731 510 345,179 Substandard nonaccrual/doubtful 4,554 21,019 7,101 10,960 30,556 18,980 263 116 93,549 Total loans $ 8,564,484 $ 7,252,803 $ 5,667,743 $ 3,373,713 $ 2,640,351 $ 8,787,735 $ 4,729,231 $ 7,348 $ 41,023,408 Gross write offs Three months ended June 30, 2023 $ 4,963 $ 569 $ 1,055 $ 5,159 $ 5,014 $ 1,756 $ — $ — $ 18,516 Six months ended June 30, 2023 5,441 5,462 2,249 5,496 5,332 1,887 — — 25,867
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 June 30, 2023 Year of Origination Total (In thousands) 2023 2022 2021 2020 2019 Prior Balance Amortized Cost Balances: U.S. government agencies 1-4 internal grade $ — $ 160,000 $ 147,806 $ 25,000 $ 4,000 $ 2,798 $ 339,604 5-7 internal grade — 8-10 internal grade — Total U.S. government agencies $ — $ 160,000 $ 147,806 $ 25,000 $ 4,000 $ 2,798 $ 339,604 Municipal 1-4 internal grade $ 1,996 $ 1,041 $ 6,955 $ 264 $ 616 $ 165,256 $ 176,128 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total municipal $ 1,996 $ 1,041 $ 6,955 $ 264 $ 616 $ 165,256 $ 176,128 Mortgage-backed securities 1-4 internal grade $ 5,065 $ 595,015 $ 2,391,178 $ — $ — $ — $ 2,991,258 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total mortgage-backed securities $ 5,065 $ 595,015 $ 2,391,178 $ — $ — $ — $ 2,991,258 Corporate notes 1-4 internal grade $ — $ 14,964 $ — $ 6,008 $ 7,269 $ 29,648 $ 57,889 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total corporate notes $ — $ 14,964 $ — $ 6,008 $ 7,269 $ 29,648 $ 57,889 Total held-to-maturity securities $ 3,564,879 Less: Allowance for credit losses (406) Held-to-maturity securities, net of allowance for credit losses $ 3,564,473
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. June 30, December 31, June 30, (In thousands) 2023 2022 2022 Allowance for loan losses $ 302,499 $ 270,173 $ 251,769 Allowance for unfunded lending-related commitments losses 84,881 87,275 60,340 Allowance for loan losses and unfunded lending-related commitments losses 387,380 357,448 312,109 Allowance for held-to-maturity securities losses 406 488 83 Allowance for credit losses $ 387,786 $ 357,936 $ 312,192
Summary 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 and six months ended June 30, 2023 and 2022 is as follows. Three months ended June 30, 2023 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 $ 149,501 $ 194,780 $ 7,728 $ 11,434 $ 11,955 $ 400 $ 375,798 Other adjustments — — — — 41 — 41 Charge-offs (5,629) (8,124) — — (4,653) (110) (18,516) Recoveries 505 25 37 6 890 23 1,486 Provision for credit losses (1,235) 29,015 (798) 812 813 (36) 28,571 Allowance for credit losses at period end $ 143,142 $ 215,696 $ 6,967 $ 12,252 $ 9,046 $ 277 $ 387,380 By measurement method: Individually measured $ 7,205 $ 5,819 $ — $ 106 $ — $ — $ 13,130 Collectively measured 135,937 209,877 6,967 12,146 9,046 277 374,250 Loans at period end Individually measured $ 40,460 $ 18,483 $ 1,361 $ 13,496 $ — $ 4 $ 73,804 Collectively measured 12,560,011 10,590,328 335,613 2,429,297 14,801,971 31,937 40,749,157 Loans held at fair value — — — 200,447 — — 200,447 Three months ended June 30, 2022 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 $ 120,911 $ 144,906 $ 10,566 $ 9,429 $ 14,722 $ 634 $ 301,168 Other adjustments — — — — (56) — (56) Charge-offs (8,928) (40) (192) — (2,903) (253) (12,316) Recoveries 996 553 123 6 1,119 23 2,820 Provision for credit losses 29,940 (1,687) (3,507) 1,044 (5,380) 83 20,493 Allowance for credit losses at period end $ 142,919 $ 143,732 $ 6,990 $ 10,479 $ 7,502 $ 487 $ 312,109 By measurement method: Individually measured $ 5,674 $ 99 $ 105 $ 790 $ — $ — $ 6,668 Collectively measured 137,245 143,633 6,885 9,689 7,502 487 305,441 Loans at period end Individually measured $ 34,892 $ 20,377 $ 11,876 $ 18,333 $ — $ 79 $ 85,557 Collectively measured 12,012,213 9,386,828 313,950 1,937,817 13,149,880 44,101 36,844,789 Loans held at fair value — — — 122,757 — — 122,757 Six months ended June 30, 2023 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 $ 142,769 $ 184,352 $ 7,573 $ 11,585 $ 10,671 $ 498 $ 357,448 Cumulative effect adjustment from the adoption of ASU 2016-13 111 1,356 (33) (692) — (1) 741 Other adjustments — — — — 45 — 45 Charge-offs (8,172) (8,129) — — (9,303) (263) (25,867) Recoveries 897 125 72 10 2,213 55 3,372 Provision for credit losses 7,537 37,992 (645) 1,349 5,420 (12) 51,641 Allowance for credit losses at period end $ 143,142 $ 215,696 $ 6,967 $ 12,252 $ 9,046 $ 277 $ 387,380 Six months ended June 30, 2022 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 $ 119,307 $ 144,583 $ 10,699 $ 8,782 $ 15,859 $ 423 $ 299,653 Other adjustments — — — — (34) — (34) Charge-offs (10,342) (817) (389) (466) (4,581) (446) (17,041) Recoveries 1,534 585 216 11 2,595 72 5,013 Provision for credit losses 32,420 (619) (3,536) 2,152 (6,337) 438 24,518 Allowance for credit losses at period end $ 142,919 $ 143,732 $ 6,990 $ 10,479 $ 7,502 $ 487 $ 312,109
Summary of the Post-Modification Balance of Loans Restructured	The table below presents a summary of the balance immediately following the modification of loans to borrowers experiencing financial difficulties during the three months and six months ended June 30, 2023: Three months ended June 30, 2023 (Dollars in thousands) Total (1) Percentage of Total Class of Loan Extension of Term (1) Reduction of Interest Rate (1) Delay in Contractual Payments (1) Extension of Term and Reduction of Interest Rate (1) Commercial Commercial, industrial and other $ 423 0.0 % $ — $ — $ — $ 423 Commercial real estate Non-construction 4,376 0.0 — — — 4,376 Home equity — — — — — — Residential real estate 264 0.0 143 — — 121 Premium finance receivables Property and casualty insurance loans — — — — — — Total loans $ 5,063 0.0 % $ 143 $ — $ — $ 4,920 Weighted average magnitude of modifications: Duration of extension of term 43 months Reduction of interest rate 207 bps Six months ended June 30, 2023 (Dollars in thousands) Total (1) Percentage of Total Class of Loan Extension of Term (1) Reduction of Interest Rate (1) Delay in Contractual Payments (1) Extension of Term and Reduction of Interest Rate (1) Commercial Commercial, industrial and other $ 37,897 0.3 % $ 1,938 $ 221 $ 35,265 $ 473 Commercial real estate Non-construction 5,709 0.1 467 827 39 4,376 Home equity 203 0.1 203 — — — Residential real estate 1,972 0.1 1,396 271 — 305 Premium finance receivables Property and casualty insurance loans 11 — 3 — — 8 Total loans $ 45,792 0.1 % $ 4,007 $ 1,319 $ 35,304 $ 5,162 Weighted average magnitude of modifications: Duration of extension of term 36 months Reduction of interest rate 223 bps Duration of delayed contractual payment terms 17 months (1) Balances represent the recorded investment in the loan at the time of the restructuring. The table below presents a summary of the balance immediately following the modification of loans restructured during the three months ended June 30, 2022 which represent TDRs: Three months ended June 30, 2022 (Dollars in thousands) Total (1)(2) Extension at Below Market Terms (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 2 $ 186 2 $ 185 — $ — — $ — — $ — Commercial real estate Non-construction — — — — — — — — — — Residential real estate and other 14 2,235 14 2,235 10 1,805 — — — — Total loans 16 $ 2,421 16 $ 2,420 10 $ 1,805 — $ — — $ — Six months ended June 30, 2022 (Dollars in thousands) Total (1)(2) Extension at Below Market Terms (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 5 $ 468 4 $ 305 1 $ 85 2 $ 247 — $ — Commercial real estate Non-construction 2 1,907 1 1,178 1 1,178 2 1,907 — — Residential real estate and other 22 3,143 22 3,143 17 2,567 — — — — Total loans 29 $ 5,518 27 $ 4,626 19 $ 3,830 4 $ 2,154 — $ — (1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above. (2) Balances represent the recorded investment in the loan at the time of the restructuring. The following table presents a summary of all loans restructured in TDRs during the twelve months ended June 30, 2022 and such loans that were in payment default under the restructured terms during the respective periods below: (Dollars in thousands) As of June 30, 2022 Three Months Ended June 30, 2022 Six months ended June 30, 2022 Total (1)(3) Payments in Default (2)(3) Payments in Default (2)(3) Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 16 $ 4,995 10 $ 4,469 11 $ 4,711 Commercial real estate Non-construction 2 1,907 — — — — Residential real estate and other 39 6,159 2 345 2 345 Total loans 57 $ 13,061 12 $ 4,814 13 $ 5,056 (1) Total TDRs represent all loans restructured om TDRs during the previous twelve months from the date indicated. (2) TDRs considered to be in payment default are over 30 days past due subsequent to the restructuring. (3) Balances represent the recorded investment in the loan at the time of the restructuring.
Summary of Loans for Borrowers Experiencing Financial Difficulties Modified	The following table presents a summary of all loans for borrowers experiencing financial difficulties modified during the six months ended June 30, 2023, and such loans that were in payment default under the restructured terms during the respective periods below: (Dollars in thousands) As of June 30, 2023 Three Months Ended June 30, 2023 Six Months Ended Total (2) Payments in Default (1)(2) Payments in Default (1)(2) Commercial Commercial, industrial and other $ 37,897 $ 18,729 $ 18,729 Commercial real estate Non-construction 5,709 923 923 Home equity 203 203 203 Residential real estate 1,972 541 541 Premium finance receivables Property and casualty insurance loans 11 11 11 Total loans $ 45,792 $ 20,407 $ 20,407 (1) Modified loans considered to be in payment default are over 30 days past due subsequent to the restructuring. (2) Balances represent the recorded investment in the loan at the time of the restructuring.

Goodwill and Other Acquisitio_2

Goodwill and Other Acquisition-Related Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
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, 2022 Goodwill Impairment Goodwill Adjustments June 30, Community banking $ 545,671 $ — $ — $ — $ 545,671 Specialty finance 38,480 — — 528 39,008 Wealth management 69,373 2,622 — — 71,995 Total $ 653,524 $ 2,622 $ — $ 528 $ 656,674
Summary of Infinite-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 June 30, 2023 is as follows: (In thousands) June 30, December 31, June 30, Community banking segment: Core deposit intangibles with finite lives: Gross carrying amount $ 55,206 $ 55,206 $ 55,206 Accumulated amortization (44,432) (42,501) (40,404) Net carrying amount $ 10,774 $ 12,705 $ 14,802 Trademark with indefinite lives: Carrying amount 5,800 5,800 5,800 Total net carrying amount $ 16,574 $ 18,505 $ 20,602 Specialty finance segment: Customer list intangibles with finite lives: Gross carrying amount $ 1,963 $ 1,962 $ 1,966 Accumulated amortization (1,813) (1,785) (1,756) Net carrying amount $ 150 $ 177 $ 210 Wealth management segment: Customer list and other intangibles with finite lives: Gross carrying amount $ 26,630 $ 20,430 $ 20,430 Accumulated amortization (17,701) (16,926) (16,124) Net carrying amount $ 8,929 $ 3,504 $ 4,306 Total acquisition-related intangible assets: Gross carrying amount $ 89,599 $ 83,398 $ 83,402 Accumulated amortization (63,946) (61,212) (58,284) Total other acquisition-related intangible assets, net $ 25,653 $ 22,186 $ 25,118
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 June 30, 2023 is as follows: (In thousands) June 30, December 31, June 30, Community banking segment: Core deposit intangibles with finite lives: Gross carrying amount $ 55,206 $ 55,206 $ 55,206 Accumulated amortization (44,432) (42,501) (40,404) Net carrying amount $ 10,774 $ 12,705 $ 14,802 Trademark with indefinite lives: Carrying amount 5,800 5,800 5,800 Total net carrying amount $ 16,574 $ 18,505 $ 20,602 Specialty finance segment: Customer list intangibles with finite lives: Gross carrying amount $ 1,963 $ 1,962 $ 1,966 Accumulated amortization (1,813) (1,785) (1,756) Net carrying amount $ 150 $ 177 $ 210 Wealth management segment: Customer list and other intangibles with finite lives: Gross carrying amount $ 26,630 $ 20,430 $ 20,430 Accumulated amortization (17,701) (16,926) (16,124) Net carrying amount $ 8,929 $ 3,504 $ 4,306 Total acquisition-related intangible assets: Gross carrying amount $ 89,599 $ 83,398 $ 83,402 Accumulated amortization (63,946) (61,212) (58,284) Total other acquisition-related intangible assets, net $ 25,653 $ 22,186 $ 25,118
Estimated Amortization	Estimated amortization Actual in six months ended June 30, 2023 $ 2,734 Estimated remaining in 2023 2,769 Estimated—2024 4,301 Estimated—2025 3,482 Estimated—2026 2,772 Estimated—2027 2,157

Mortgage Servicing Rights ("M_2

Mortgage Servicing Rights ("MSRs") (Tables)	6 Months Ended
Mortgage Servicing Rights ("MSRs") (Tables)	Jun. 30, 2023
Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]
Schedule of Servicing Assets at Fair Value	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 Six Months Ended June 30, June 30, June 30, June 30, (In thousands) 2023 2022 2023 2022 Fair value at beginning of the period $ 224,470 199,146 $ 230,225 $ 147,571 Additions from loans sold with servicing retained 8,720 11,210 13,827 25,611 Servicing rights sold (30,170) — (30,170) — Estimate of changes in fair value due to: Early buyout options (“EBO”) exercised — (1) — (176) Payoffs and paydowns (5,043) (6,838) (8,952) (12,854) Changes in valuation inputs or assumptions 2,715 9,147 (4,238) 52,512 Fair value at end of the period $ 200,692 $ 212,664 $ 200,692 $ 212,664 Unpaid principal balance of mortgage loans serviced for others $ 11,752,223 $ 13,643,623

Deposits (Tables)

Deposits (Tables)	6 Months Ended
Deposits (Tables)	Jun. 30, 2023
Deposits [Abstract]
Summary of Deposits	The following table is a summary of deposits as of the dates shown: (Dollars in thousands) June 30, December 31, June 30, Balance: Non-interest-bearing $ 10,604,915 $ 12,668,160 $ 13,855,844 NOW and interest-bearing demand deposits 5,814,836 5,591,986 5,918,908 Wealth management deposits 1,417,984 2,463,833 3,182,407 Money market 14,523,124 12,886,795 12,273,350 Savings 5,321,578 4,556,635 3,686,596 Time certificates of deposit 6,356,270 4,735,135 3,676,221 Total deposits $ 44,038,707 $ 42,902,544 $ 42,593,326 Mix: Non-interest-bearing 24 % 30 % 33 % NOW and interest-bearing demand deposits 13 13 13 Wealth management deposits 3 5 7 Money market 33 30 29 Savings 12 11 9 Time certificates of deposit 15 11 9 Total deposits 100 % 100 % 100 %

FHLB Advances, Other Borrowin_2

FHLB Advances, Other Borrowings and Subordinated Notes (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Summary of Debt	The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown: (In thousands) June 30, December 31, June 30, FHLB advances $ 2,026,071 $ 2,316,071 $ 1,166,071 Other borrowings: Notes payable 185,539 199,793 69,619 Short-term borrowings 17,773 17,612 16,418 Secured borrowings 326,348 317,942 334,467 Other 135,559 61,267 62,283 Total other borrowings 665,219 596,614 482,787 Subordinated notes 437,628 437,392 437,162 Total FHLB advances, other borrowings and subordinated notes $ 3,128,918 $ 3,350,077 $ 2,086,020
Schedule of Financial Instruments Owned and Pledged as Collateral	The following is a summary of these securities pledged as of June 30, 2023 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 $ 17,819 Excess collateral 1,546 Securities sold under repurchase agreements $ 16,273

Junior Subordinated Debentures

Junior Subordinated Debentures (Tables)	6 Months Ended
Junior Subordinated Debentures (Tables)	Jun. 30, 2023
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Summary of Junior Subordinated Debentures	The following table provides a summary of the Company’s junior subordinated debentures as of June 30, 2023. The junior subordinated debentures represent the par value of the obligations owed to the Trusts. (Dollars in thousands) Common Trust Junior Rate Contractual Rate at 6/30/2023 Issue Maturity Earliest Wintrust Capital Trust III $ 774 $ 25,000 $ 25,774 L+3.25 8.51 % 04/2003 04/2033 04/2008 Wintrust Statutory Trust IV 619 20,000 20,619 L+2.80 8.34 % 12/2003 12/2033 12/2008 Wintrust Statutory Trust V 1,238 40,000 41,238 L+2.60 8.14 % 05/2004 05/2034 06/2009 Wintrust Capital Trust VII 1,550 50,000 51,550 L+1.95 7.50 % 12/2004 03/2035 03/2010 Wintrust Capital Trust VIII 1,238 25,000 26,238 L+1.45 6.99 % 08/2005 09/2035 09/2010 Wintrust Capital Trust IX 1,547 50,000 51,547 L+1.63 7.18 % 09/2006 09/2036 09/2011 Northview Capital Trust I 186 6,000 6,186 L+3.00 8.30 % 08/2003 11/2033 08/2008 Town Bankshares Capital Trust I 186 6,000 6,186 L+3.00 8.30 % 08/2003 11/2033 08/2008 First Northwest Capital Trust I 155 5,000 5,155 L+3.00 8.54 % 05/2004 05/2034 05/2009 Suburban Illinois Capital Trust II 464 15,000 15,464 L+1.75 7.30 % 12/2006 12/2036 12/2011 Community Financial Shares Statutory Trust II 109 3,500 3,609 L+1.62 7.17 % 06/2007 09/2037 06/2012 Total $ 253,566 7.70 %

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
Segment Information (Tables)	Jun. 30, 2023
Segment Reporting [Abstract]
Summary of Segment Information	The following is a summary of certain operating information for reportable segments: Three Months Ended $ Change in % Change in (Dollars in thousands) June 30, June 30, Net interest income: Community Banking $ 346,232 $ 261,726 $ 84,506 32 % Specialty Finance 84,993 58,718 26,275 45 Wealth Management 7,404 9,534 (2,130) (22) Total Operating Segments 438,629 329,978 108,651 33 Intersegment Eliminations 8,908 7,826 1,082 14 Consolidated net interest income $ 447,537 $ 337,804 $ 109,733 32 % Provision for credit losses: Community Banking $ 26,713 $ 20,225 $ 6,488 32 % Specialty Finance 1,801 192 1,609 NM Wealth Management — — — — Total Operating Segments 28,514 20,417 8,097 40 Intersegment Eliminations — — — — Consolidated provision for credit losses $ 28,514 $ 20,417 $ 8,097 40 % Non-interest income: Community Banking $ 68,130 $ 62,714 $ 5,416 9 % Specialty Finance 31,737 24,992 6,745 27 Wealth Management 33,391 30,226 3,165 10 Total Operating Segments 133,258 117,932 15,326 13 Intersegment Eliminations (20,228) (14,990) (5,238) 35 Consolidated non-interest income $ 113,030 $ 102,942 $ 10,088 10 % Net revenue: Community Banking $ 414,362 $ 324,440 $ 89,922 28 % Specialty Finance 116,730 83,710 33,020 39 Wealth Management 40,795 39,760 1,035 3 Total Operating Segments 571,887 447,910 123,977 28 Intersegment Eliminations (11,320) (7,164) (4,156) 58 Consolidated net revenue $ 560,567 $ 440,746 $ 119,821 27 % Segment profit: Community Banking $ 102,517 $ 54,647 $ 47,870 88 % Specialty Finance 46,402 30,558 15,844 52 Wealth Management 5,831 9,308 (3,477) (37) Consolidated net income $ 154,750 $ 94,513 $ 60,237 64 % Segment assets: Community Banking $ 42,452,673 $ 40,098,458 $ 2,354,215 6 % Specialty Finance 10,549,819 9,207,215 1,342,604 15 Wealth Management 1,283,684 1,663,659 (379,975) (23) Consolidated total assets $ 54,286,176 $ 50,969,332 $ 3,316,844 7 % NM - Not meaningful Six Months Ended $ Change in % Change in (Dollars in thousands) June 30, June 30, Net interest income: Community Banking $ 716,080 $ 490,341 $ 225,739 46 % Specialty Finance 155,344 114,088 41,256 36 Wealth Management 16,359 17,910 (1,551) (9) Total Operating Segments 887,783 622,339 265,444 43 Intersegment Eliminations 17,749 14,759 2,990 20 Consolidated net interest income $ 905,532 $ 637,098 $ 268,434 42 % Provision for credit losses: Community Banking $ 47,812 $ 24,343 $ 23,469 96 % Specialty Finance 3,747 180 3,567 NM Wealth Management — — — — Total Operating Segments 51,559 24,523 27,036 110 Intersegment Eliminations — — — Consolidated provision for credit losses $ 51,559 $ 24,523 $ 27,036 110 % Non-interest income: Community Banking $ 136,863 $ 184,602 $ (47,739) (26) % Specialty Finance 57,527 49,114 8,413 17 Wealth Management 63,688 60,804 2,884 5 Total Operating Segments 258,078 294,520 (36,442) (12) Intersegment Eliminations (37,279) (28,788) (8,491) 29 Consolidated non-interest income $ 220,799 $ 265,732 $ (44,933) (17) % Net revenue: Community Banking $ 852,943 $ 674,943 $ 178,000 26 % Specialty Finance 212,871 163,202 49,669 30 Wealth Management 80,047 78,714 1,333 2 Total Operating Segments 1,145,861 916,859 229,002 25 Intersegment Eliminations (19,530) (14,029) (5,501) 39 Consolidated net revenue $ 1,126,331 $ 902,830 $ 223,501 25 % Segment profit: Community Banking $ 236,749 $ 144,746 $ 92,003 64 % Specialty Finance 83,139 60,162 22,977 38 Wealth Management 15,060 16,996 (1,936) (11) Consolidated net income $ 334,948 $ 221,904 $ 113,044 51 % NM - Not meaningful

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
Derivative Financial Instruments (Tables)	Jun. 30, 2023
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 June 30, 2023, December 31, 2022 and June 30, 2022: Derivative Assets Derivative Liabilities (In thousands) June 30, December 31, June 30, June 30, December 31, June 30, Derivatives designated as hedging instruments under ASC 815: Interest rate derivatives designated as Cash Flow Hedges $ 2,154 $ — $ 151 $ 121,347 $ 58,198 $ — Interest rate derivatives designated as Fair Value Hedges 16,255 16,768 10,396 — — 128 Total derivatives designated as hedging instruments under ASC 815 $ 18,409 $ 16,768 $ 10,547 $ 121,347 $ 58,198 $ 128 Derivatives not designated as hedging instruments under ASC 815: Interest rate derivatives $ 261,205 $ 269,670 $ 165,209 $ 261,066 $ 271,109 $ 164,979 Interest rate lock commitments 3,487 1,711 6,649 172 58 173 Forward commitments to sell mortgage loans 2,769 220 906 38 414 1,963 Commodity forward contracts 434 257 — 214 162 — Foreign exchange contracts 8,444 8,222 614 8,335 8,137 614 Total derivatives not designated as hedging instruments under ASC 815 $ 276,339 $ 280,080 $ 173,378 $ 269,825 $ 279,880 $ 167,729 Total Derivatives $ 294,748 $ 296,848 $ 183,925 $ 391,172 $ 338,078 $ 167,857
Schedule Of Cash Flow Hedging Instruments	The table below provides details on these cash flow hedges, summarized by derivative type and maturity, as of June 30, 2023: June 30, 2023 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 $ (29,186) Buy 2.750% floor, sell 4.320% cap; matures October 2026 500,000 (6,375) Buy 2.000% floor, sell 3.450% cap; matures September 2027 1,250,000 (45,700) Interest Rate Swaps at 1-month CME term SOFR: Fixed 3.748%; matures December 2025 250,000 (4,422) Fixed 3.759%; matures December 2025 250,000 (4,356) Fixed 3.680%; matures February 2026 250,000 (4,762) Fixed 4.176%; matures March 2026 250,000 (1,563) Fixed 3.915%; matures March 2026 250,000 (3,211) Fixed 4.450%; matures July 2026 250,000 1,046 Fixed 3.515%, matures December 2026 250,000 (5,208) Fixed 3.512%; matures December 2026 250,000 (5,233) Fixed 3.453%; matures February 2027 250,000 (5,654) Fixed 4.150%; matures July 2027 250,000 1,108 Fixed 3.748%; matures March 2028 250,000 (1,652) Fixed 3.526%; matures March 2028 250,000 (4,025) Total Cash Flow Hedges $ 6,000,000 $ (119,193)
Rollforward 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 Six Months Ended (In thousands) June 30, June 30, June 30, June 30, Unrealized gain at beginning of period $ 44,692 $ 76,389 $ 10,026 $ 36,908 Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings 14,092 1,012 17,664 6,365 Amount of gain recognized in other comprehensive income or loss (120,523) 1,363 (89,429) 35,491 Unrealized gain at end of period $ (61,739) $ 78,764 $ (61,739) $ 78,764
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 June 30, 2023: June 30, 2023 (In thousands) 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 $ 187,102 $ (16,202) $ (94) Available-for-sale debt securities 828 (25) — 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 Three Months Ended Six Months Ended June 30, 2023 June 30, 2023 Interest rate swaps Interest and fees on loans $ (7) $ 2 Interest income - investment securities — —
Summary Amounts Included In 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 Six Months Ended Derivative Location in income statement June 30, June 30, June 30, June 30, Interest rate swaps and caps Trading gains, net $ 12 $ 161 $ 812 $ 4,185 Mortgage banking derivatives Mortgage banking revenue 4,791 (7,550) 8,431 (14,919) Commodity contracts Trading gains, net 49 — 226 — Foreign exchange contracts Trading gains, net — — — — Covered call options Fees from covered call options 2,578 1,069 12,969 4,811 Derivative contract held as economic hedge on MSRs Mortgage banking revenue (726) — 220 —
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) June 30, December 31, June 30, June 30, December 31, June 30, Gross Amounts Recognized $ 279,614 $ 286,438 $ 175,756 $ 382,413 $ 329,307 $ 165,107 Less: Amounts offset in the Statements of Condition — — — — — — Net amount presented in the Statements of Condition $ 279,614 $ 286,438 $ 175,756 $ 382,413 $ 329,307 $ 165,107 Gross amounts not offset in the Statements of Condition Offsetting Derivative Positions (125,159) (64,100) (6,009) (125,159) (64,100) (6,009) Collateral Posted (145,735) (194,666) (163,412) — — (91) Net Credit Exposure $ 8,720 $ 27,672 $ 6,335 $ 257,254 $ 265,207 $ 159,007
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) June 30, December 31, June 30, June 30, December 31, June 30, Gross Amounts Recognized $ 279,614 $ 286,438 $ 175,756 $ 382,413 $ 329,307 $ 165,107 Less: Amounts offset in the Statements of Condition — — — — — — Net amount presented in the Statements of Condition $ 279,614 $ 286,438 $ 175,756 $ 382,413 $ 329,307 $ 165,107 Gross amounts not offset in the Statements of Condition Offsetting Derivative Positions (125,159) (64,100) (6,009) (125,159) (64,100) (6,009) Collateral Posted (145,735) (194,666) (163,412) — — (91) Net Credit Exposure $ 8,720 $ 27,672 $ 6,335 $ 257,254 $ 265,207 $ 159,007

Fair Values of Assets and Lia_2

Fair Values of Assets and Liabilities (Tables)	6 Months Ended
Fair Values of Assets and Liabilities (Tables)	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Summary 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: June 30, 2023 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 74,275 — 74,275 — Municipal 167,411 — 53,256 114,155 Corporate notes 72,060 — 72,060 — Mortgage-backed 3,178,735 — 3,178,735 — Trading account securities 3,027 — 3,027 — Equity securities with readily determinable fair value 116,275 108,209 8,066 — Mortgage loans held-for-sale 338,728 — 309,322 29,406 Loans held-for-investment 193,953 — 132,830 61,123 MSRs 200,692 — — 200,692 Nonqualified deferred compensation assets 14,796 — 14,796 — Derivative assets 294,748 — 291,261 3,487 Total $ 4,654,700 $ 108,209 $ 4,137,628 $ 408,863 Derivative liabilities $ 391,172 $ — $ 391,172 $ — December 31, 2022 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ 14,948 $ 14,948 $ — $ — U.S. government agencies 74,222 — 74,222 — Municipal 168,655 — 51,118 117,537 Corporate notes 85,705 — 85,705 — Mortgage-backed 2,899,487 — 2,899,487 — Trading account securities 1,127 — 1,127 — Equity securities with readily determinable fair value 110,365 102,299 8,066 — Mortgage loans held-for-sale 299,935 — 251,280 48,655 Loans held-for-investment 179,932 — 95,767 84,165 MSRs 230,225 — — 230,225 Nonqualified deferred compensation assets 13,899 — 13,899 — Derivative assets 296,848 — 295,137 1,711 Total $ 4,375,348 $ 117,247 $ 3,775,808 $ 482,293 Derivative liabilities $ 338,078 $ — $ 338,078 $ — June 30, 2022 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 48,087 — 48,087 — Municipal 166,705 — 53,220 113,485 Corporate notes 89,813 — 89,813 — Mortgage-backed 2,665,516 — 2,665,516 — Trading account securities 1,010 — 1,010 — Equity securities with readily determinable fair value 93,295 85,229 8,066 — Mortgage loans held-for-sale 513,232 — 424,269 88,963 Loans held-for-investment 122,757 — 37,959 84,798 MSRs 212,664 — — 212,664 Nonqualified deferred compensation assets 13,936 — 13,936 — Derivative assets 183,925 — 177,276 6,649 Total $ 4,110,940 $ 85,229 $ 3,519,152 $ 506,559 Derivative liabilities $ 167,857 $ — $ 167,857 $ —
Summary 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 and six months ended June 30, 2023 and 2022 are summarized as follows: Mortgage loans held-for-sale Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at April 1, 2023 $ 112,257 $ 44,250 $ 69,493 $ 224,470 $ 5,356 Total net (losses) gains included in: Net income (1) — 402 (619) 6,392 (1,869) Other comprehensive income or loss (3,161) — — — — Purchases 6,978 — — — — Issuances — — — — — Sales — — — (30,170) — Settlements (1,919) (23,973) (16,593) — — Net transfers into Level 3 — 8,727 8,842 — — Balance at June 30, 2023 $ 114,155 $ 29,406 $ 61,123 $ 200,692 $ 3,487 (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. Mortgage loans held-for-sale Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at April 1, 2022 $ 100,401 $ — $ 44,464 $ 199,146 $ 3,447 Total net (losses) gains included in: Net income (1) — (2,900) (1,775) 13,518 3,202 Other comprehensive income or loss (685) — — — — Purchases 15,497 — — — — Issuances — — — — — Sales — — — — — Settlements (1,728) — (7,231) — — Net transfers into Level 3 — 91,863 49,340 — — Balance at June 30, 2022 $ 113,485 $ 88,963 $ 84,798 $ 212,664 $ 6,649 Mortgage loans held-for-sale Loans held-for- investment Mortgage 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) — 868 (255) 637 1,776 Other comprehensive income or loss (4,823) — — — — Purchases 11,396 — — — — Issuances — — — — — Sales — — — (30,170) — Settlements (9,955) (42,592) (36,915) — — Net transfers into Level 3 — 22,475 14,128 — — Balance at June 30, 2023 $ 114,155 $ 29,406 $ 61,123 $ 200,692 $ 3,487 Mortgage loans held-for-sale Loans held-for- investment Mortgage Derivative Assets (In thousands) Municipal Balance at January 1, 2022 $ 105,687 $ — $ 15,891 $ 147,571 $ 10,560 Total net (losses) gains included in: Net income (1) — (2,900) (2,547) 65,093 (3,911) Other comprehensive income or loss (6,134) — — — — Purchases 16,743 — — — — Issuances — — — — — Sales — — — — — Settlements (2,811) — (8,898) — — Net transfers into Level 3 — 91,863 80,352 — — Balance at June 30, 2022 $ 113,485 $ 88,963 $ 84,798 $ 212,664 $ 6,649
Summary 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 June 30, 2023: June 30, 2023 Three Months Ended June 30, 2023 Fair Value Losses Recognized, net Six Months Ended June 30, 2023 Fair Value Losses Recognized, net (In thousands) Total Level 1 Level 2 Level 3 Individually assessed loans - foreclosure probable and collateral-dependent $ 73,804 $ — $ — $ 73,804 $ 11,635 $ 14,136 Other real estate owned (1) 11,586 — — 11,586 — 104 Total $ 85,390 $ — $ — $ 85,390 $ 11,635 $ 14,240 (1) Fair value losses recognized, net 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 NonRecurring	The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at June 30, 2023 were as follows: (Dollars in thousands) Fair Value Valuation Methodology Significant Unobservable Input Range Weighted Impact to valuation Measured at fair value on a recurring basis: Municipal securities $ 114,155 Bond pricing Equivalent rating BBB-AA+ N/A Increase Mortgage loans held-for-sale 29,406 Discounted cash flows Discount rate 6.50% 6.50% Decrease Credit discount 0% - 13% 0.42% Decrease Loans held-for-investment 61,123 Discounted cash flows Discount rate 6.50% - 7.25% 6.57% Decrease Credit discount 0% - 14% 0.89% Decrease Constant prepayment rate (CPR) - current loans 7.01% 7.01% Decrease Average life - delinquent loans (in years) 2.7 years - 10.5 years 6.2 years Decrease MSRs 200,692 Discounted cash flows Discount rate 2% - 21% 10.50% Decrease Constant prepayment rate (CPR) 0% - 100% 7.01% Decrease Cost of servicing $70 - $200 $ 77 Decrease Cost of servicing - delinquent $200 - 1,000 $ 405 Decrease Derivatives 3,487 Discounted cash flows Pull-through rate 13% - 100% 83.16 % Increase Measured at fair value on a non-recurring basis: Individually assessed loans - foreclosure probable and collateral-dependent 73,804 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease Other real estate owned 11,586 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease
Summary 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 June 30, 2023 At December 31, 2022 At June 30, 2022 Carrying Fair Carrying Fair Carrying Fair (In thousands) Value Value Value Value Value Value Financial Assets: Cash and cash equivalents $ 513,917 $ 513,917 $ 490,966 $ 490,966 $ 498,947 $ 498,947 Securities sold under agreements to repurchase with original maturities exceeding three months — — — — 475,000 475,000 Interest-bearing deposits with banks 2,163,708 2,163,708 1,988,719 1,988,719 3,266,541 3,266,541 Available-for-sale securities 3,492,481 3,492,481 3,243,017 3,243,017 2,970,121 2,970,121 Held-to-maturity securities 3,564,473 2,887,891 3,640,567 2,949,821 3,413,469 2,900,269 Trading account securities 3,027 3,027 1,127 1,127 1,010 1,010 Equity securities with readily determinable fair value 116,275 116,275 110,365 110,365 93,295 93,295 FHLB and FRB stock, at cost 195,117 195,117 224,759 224,759 136,138 136,138 Brokerage customer receivables 15,722 15,722 16,387 16,387 21,527 21,527 Mortgage loans held-for-sale, at fair value 338,728 338,728 299,935 299,935 513,232 513,232 Loans held-for-investment, at fair value 193,953 193,953 179,932 179,932 122,757 122,757 Loans held-for-investment, at amortized cost 40,829,455 40,142,976 39,016,553 38,018,678 36,930,346 36,165,838 Nonqualified deferred compensation assets 14,796 14,796 13,899 13,899 13,936 13,936 Derivative assets 294,748 294,748 296,848 296,848 183,925 183,925 Accrued interest receivable and other 434,553 434,553 379,719 379,719 283,626 283,626 Total financial assets $ 52,170,953 $ 50,807,892 $ 49,902,793 $ 48,214,172 $ 48,923,870 $ 47,646,162 Financial Liabilities Non-maturity deposits $ 37,682,437 $ 37,682,437 $ 38,167,409 $ 38,167,409 $ 38,917,105 $ 38,917,105 Deposits with stated maturities 6,356,270 6,300,161 4,735,135 4,085,058 3,676,221 3,683,452 FHLB advances 2,026,071 2,072,317 2,316,071 2,219,983 1,166,071 1,116,429 Other borrowings 665,219 662,156 596,614 569,342 482,787 483,592 Subordinated notes 437,628 405,762 437,392 409,395 437,162 434,809 Junior subordinated debentures 253,566 253,562 253,566 253,405 253,566 281,085 Derivative liabilities 391,172 391,172 338,078 338,078 167,857 167,857 Accrued interest payable 45,359 45,359 22,176 22,176 8,233 8,233 Total financial liabilities $ 47,857,722 $ 47,812,926 $ 46,866,441 $ 46,064,846 $ 45,109,002 $ 45,092,562

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	6 Months Ended
Stock-Based Compensation Plans (Tables)	Jun. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Summary Of Stock Option Activity	A summary of the Plans’ stock option activity for the six months ended June 30, 2023 and June 30, 2022 is presented below: Stock Options Common Weighted 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 June 30, 2023 13,875 $ 42.18 4.5 $ 422 Exercisable at June 30, 2023 13,875 $ 42.18 4.5 $ 422 Stock Options Common Weighted Remaining Contractual Term (1) Intrinsic Value (2) (in thousands) Outstanding at January 1, 2022 193,447 $ 41.62 Granted — — Exercised (83,507) 42.39 Forfeited or canceled (1,430) 40.87 Outstanding at June 30, 2022 108,510 $ 41.04 1.2 $ 4,244 Exercisable at June 30, 2022 108,510 $ 41.04 1.2 $ 4,244 (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.
Summary of Plans' Restricted and Performance Share Award Activity	A summary of the Plans’ restricted share activity for the six months ended June 30, 2023 and June 30, 2022 is presented below: Six months ended June 30, 2023 Six months ended June 30, 2022 Restricted Shares Common Weighted Common Weighted Outstanding at January 1 610,155 $ 73.21 476,813 $ 61.33 Granted 260,173 88.29 204,043 96.95 Vested and issued (103,161) 64.08 (56,380) 64.44 Forfeited or canceled (7,638) 82.82 (9,722) 72.87 Outstanding at June 30 759,529 $ 79.52 614,754 $ 72.68 Vested, but deferred, at June 30 98,247 $ 53.35 96,400 $ 52.83 A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the six months ended June 30, 2023 and June 30, 2022 is presented below: Six months ended June 30, 2023 Six months ended June 30, 2022 Performance-based Stock Common Weighted Common Weighted Outstanding at January 1 545,379 $ 70.30 557,255 $ 62.94 Granted 186,313 92.45 160,326 97.16 Added by performance factor at vesting 23,161 63.64 — — Vested and issued (178,203) 63.64 — — Forfeited or canceled (7,909) 82.73 (163,803) 71.44 Outstanding at June 30 568,741 $ 79.20 553,778 $ 70.34 Vested, but deferred, at June 30 36,438 $ 44.99 35,424 $ 44.04

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
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 Accumulated Accumulated Total Balance at April 1, 2023 $ (351,995) $ 32,809 $ (48,250) $ (367,436) Other comprehensive (loss) income during the period, net of tax, before reclassifications (33,909) (88,405) 5,344 (116,970) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (1) 10,337 — 10,336 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 (20) — — (20) Net other comprehensive (loss) income during the period, net of tax $ (33,930) $ (78,068) $ 5,344 $ (106,654) Balance at June 30, 2023 $ (385,925) $ (45,259) $ (42,906) $ (474,090) Balance at January 1, 2023 $ (386,057) $ 7,381 $ (48,960) $ (427,636) Other comprehensive income (loss) during the period, net of tax, before reclassifications 594 (65,597) 6,054 (58,949) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (410) 12,957 — 12,547 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 (52) — — (52) Net other comprehensive income (loss) during the period, net of tax $ 132 $ (52,640) $ 6,054 $ (46,454) Balance at June 30, 2023 $ (385,925) $ (45,259) $ (42,906) $ (474,090) Balance at April 1, 2022 $ (142,604) $ 56,060 $ (29,455) $ (115,999) Other comprehensive (loss) income during the period, net of tax, before reclassifications (122,154) 999 (6,593) (127,748) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax — 742 — 742 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 (loss) income during the period, net of tax $ (122,186) $ 1,741 $ (6,593) $ (127,038) Balance at June 30, 2022 $ (264,790) $ 57,801 $ (36,048) $ (243,037) Balance at January 1, 2022 $ 8,724 $ 27,111 $ (31,743) $ 4,092 Other comprehensive (loss) income during the period, net of tax, before reclassifications (273,268) 26,022 (4,305) (251,551) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (183) 4,668 — 4,485 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 (63) — — (63) Net other comprehensive (loss) income during the period, net of tax $ (273,514) $ 30,690 $ (4,305) $ (247,129) Balance at June 30, 2022 $ (264,790) $ 57,801 $ (36,048) $ (243,037)
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 Six Months Ended Impacted Line on the June 30, June 30, 2023 2022 2023 2022 Accumulated unrealized gains on securities Gains included in net income $ 2 $ — $ 562 $ 250 Gains (losses) on investment securities, net 2 — 562 250 Income before taxes Tax effect (1) — (152) (67) Income tax expense Net of tax $ 1 $ — $ 410 $ 183 Net income Accumulated unrealized gains on derivative instruments Amount reclassified to interest income on loans $ 18,661 $ — $ 27,733 $ — Interest on Loans Amount reclassified to interest expense on deposits $ (4,657) $ 657 $ (10,245) $ 5,476 Interest on deposits Amount reclassified to interest expense on other borrowings 88 355 176 889 Interest on other borrowings (14,092) (1,012) (17,664) (6,365) Income before taxes Tax effect 3,755 270 4,707 1,697 Income tax expense Net of tax $ (10,337) $ (742) $ (12,957) $ (4,668) Net income
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 Six Months Ended (In thousands, except per share data) June 30, June 30, June 30, June 30, Net income $ 154,750 $ 94,513 $ 334,948 $ 221,904 Less: Preferred stock dividends 6,991 6,991 13,982 13,982 Net income applicable to common shares (A) $ 147,759 $ 87,522 $ 320,966 $ 207,922 Weighted average common shares outstanding (B) 61,192 58,063 61,072 57,632 Effect of dilutive potential common shares Common stock equivalents 902 775 933 823 Weighted average common shares and effect of dilutive potential common shares (C) 62,094 58,838 62,005 58,455 Net income per common share: Basic (A/B) $ 2.41 $ 1.51 $ 5.26 $ 3.61 Diluted (A/C) $ 2.38 $ 1.49 $ 5.18 $ 3.56

Recent Accounting Development_2

Recent Accounting Developments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss adjustment	$ 387,380	$ 375,798		$ 357,448	$ 312,109	$ 301,168	$ 299,653
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss adjustment				$ 741
Cumulative Effect, Period of Adoption, Adjustment \| Accounting Standards Update 2022-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss adjustment			$ 741

Business Combinations (Detail)

Business Combinations (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Apr. 03, 2023	Dec. 31, 2022	Jun. 30, 2022
Business Acquisition [Line Items]
Goodwill	$ 656,674		$ 653,524	$ 654,709
Rothschild & Co Asset Management U.S.
Business Acquisition [Line Items]
Assets acquired in acquisition		$ 12,600
Goodwill		$ 2,600

Investment Securities (Schedule

Investment Securities (Schedule of Investment Securities) (Detail) - USD ($)	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Available-for-sale securities
Amortized Cost	$ 4,018,851,000	$ 3,769,634,000	$ 3,331,501,000
Gross Unrealized Gains	102,000	511,000	599,000
Gross Unrealized Losses	(526,472,000)	(527,128,000)	(361,979,000)
Fair Value	3,492,481,000	3,243,017,000	2,970,121,000
Held-to-maturity securities
Amortized Cost	3,564,879,000	3,641,055,000	3,413,552,000
Gross Unrealized Gains	397,000	477,000	1,197,000
Gross Unrealized Losses	(677,385,000)	(691,711,000)	(514,480,000)
Fair Value	2,887,891,000	2,949,821,000	2,900,269,000
Less: Allowance for credit losses	(406,000)	(488,000)	(83,000)
Held-to-maturity securities, net of allowance for credit losses	3,564,473,000	3,640,567,000	3,413,469,000
Equity securities with readily determinable fair value
Amortized Cost	120,629,000	115,552,000	96,247,000
Gross Unrealized Gains	3,711,000	2,935,000	3,143,000
Gross Unrealized Losses	(8,065,000)	(8,122,000)	(6,095,000)
Fair Value	116,275,000	110,365,000	93,295,000
U.S. Treasury
Available-for-sale securities
Amortized Cost	0	14,943,000	0
Gross Unrealized Gains	0	5,000	0
Gross Unrealized Losses	0	0	0
Fair Value	0	14,948,000	0
U.S. government agencies
Available-for-sale securities
Amortized Cost	80,000,000	80,000,000	50,000,000
Gross Unrealized Gains	0	36,000	0
Gross Unrealized Losses	(5,725,000)	(5,814,000)	(1,913,000)
Fair Value	74,275,000	74,222,000	48,087,000
Held-to-maturity securities
Amortized Cost	339,604,000	339,614,000	294,631,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(71,022,000)	(75,293,000)	(53,222,000)
Fair Value	268,582,000	264,321,000	241,409,000
Municipal
Available-for-sale securities
Amortized Cost	173,540,000	173,861,000	170,268,000
Gross Unrealized Gains	102,000	230,000	570,000
Gross Unrealized Losses	(6,231,000)	(5,436,000)	(4,133,000)
Fair Value	167,411,000	168,655,000	166,705,000
Held-to-maturity securities
Amortized Cost	176,128,000	179,027,000	179,642,000
Gross Unrealized Gains	362,000	477,000	1,195,000
Gross Unrealized Losses	(4,502,000)	(4,066,000)	(2,796,000)
Fair Value	171,988,000	175,438,000	178,041,000
Corporate notes
Held-to-maturity securities
Amortized Cost	57,889,000	58,232,000	48,574,000
Gross Unrealized Gains	35,000	0	2,000
Gross Unrealized Losses	(4,733,000)	(5,348,000)	(4,158,000)
Fair Value	53,191,000	52,884,000	44,418,000
Financial issuers
Available-for-sale securities
Amortized Cost	83,995,000	93,994,000	93,994,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(12,920,000)	(9,291,000)	(5,177,000)
Fair Value	71,075,000	84,703,000	88,817,000
Other
Available-for-sale securities
Amortized Cost	1,000,000	1,000,000	1,000,000
Gross Unrealized Gains	0	2,000	0
Gross Unrealized Losses	(15,000)	0	(4,000)
Fair Value	985,000	1,002,000	996,000
Mortgage-backed securities
Available-for-sale securities
Amortized Cost	3,585,943,000	3,308,494,000	2,915,107,000
Gross Unrealized Gains	0	238,000	28,000
Gross Unrealized Losses	(483,659,000)	(488,795,000)	(336,517,000)
Fair Value	3,102,284,000	2,819,937,000	2,578,618,000
Held-to-maturity securities
Amortized Cost	2,832,138,000	2,900,031,000	2,719,754,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(574,114,000)	(583,682,000)	(438,050,000)
Fair Value	2,258,024,000	2,316,349,000	2,281,704,000
Collateralized mortgage obligations
Available-for-sale securities
Amortized Cost	94,373,000	97,342,000	101,132,000
Gross Unrealized Gains	0	0	1,000
Gross Unrealized Losses	(17,922,000)	(17,792,000)	(14,235,000)
Fair Value	76,451,000	79,550,000	86,898,000
Held-to-maturity securities
Amortized Cost	159,120,000	164,151,000	170,951,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(23,014,000)	(23,322,000)	(16,254,000)
Fair Value	136,106,000	140,829,000	154,697,000
Mortgage-backed securities, subprime
Available-for-sale securities
Fair Value	$ 0	$ 0	$ 0

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail)	3 Months Ended		6 Months Ended
Investment Securities (Narrative) (Detail)	Jun. 30, 2023 USD ($) security	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) security	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities without readily determinable fair value	$ 53,400,000		$ 53,400,000
Upward adjustments of equity securities without readily determinable fair values	0	$ 0	0	$ 0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	0	3,786,000	0	4,357,000
Pledged securities	$ 6,400,000,000	$ 2,800,000,000	$ 6,400,000,000	$ 2,800,000,000	$ 2,800,000,000
Number of securities by a single non-government sponsored issuer exceeding 10% of shareholders' equity \| security	0		0

Investment Securities (Schedu_2

Investment Securities (Schedule of Investment Securities Portfolio Continuous Unrealized Loss Position) (Detail) - USD ($)	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	$ 1,008,946,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(20,549,000)
Continuous unrealized losses existing for greater than 12 months, fair value	2,471,210,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(505,923,000)
Total, fair value	3,480,156,000
Total, unrealized losses	(526,472,000)
Subprime mortgage-backed available-for-sale securities	3,492,481,000	$ 3,243,017,000	$ 2,970,121,000
U.S. government agencies
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	29,909,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(91,000)
Continuous unrealized losses existing for greater than 12 months, fair value	44,366,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(5,634,000)
Total, fair value	74,275,000
Total, unrealized losses	(5,725,000)
Subprime mortgage-backed available-for-sale securities	74,275,000	74,222,000	48,087,000
Municipal
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	101,356,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(1,988,000)
Continuous unrealized losses existing for greater than 12 months, fair value	53,731,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(4,243,000)
Total, fair value	155,087,000
Total, unrealized losses	(6,231,000)
Subprime mortgage-backed available-for-sale securities	167,411,000	168,655,000	166,705,000
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	71,075,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(12,920,000)
Total, fair value	71,075,000
Total, unrealized losses	(12,920,000)
Subprime mortgage-backed available-for-sale securities	71,075,000	84,703,000	88,817,000
Other
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	985,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(15,000)
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	985,000
Total, unrealized losses	(15,000)
Subprime mortgage-backed available-for-sale securities	985,000	1,002,000	996,000
Mortgage-backed securities
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	876,659,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(18,454,000)
Continuous unrealized losses existing for greater than 12 months, fair value	2,225,624,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(465,205,000)
Total, fair value	3,102,283,000
Total, unrealized losses	(483,659,000)
Subprime mortgage-backed available-for-sale securities	3,102,284,000	2,819,937,000	2,578,618,000
Collateralized mortgage obligations
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	37,000
Continuous unrealized losses existing for less than 12 months, unrealized losses	(1,000)
Continuous unrealized losses existing for greater than 12 months, fair value	76,414,000
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(17,921,000)
Total, fair value	76,451,000
Total, unrealized losses	(17,922,000)
Subprime mortgage-backed available-for-sale securities	76,451,000	79,550,000	86,898,000
Mortgage-backed securities, subprime
Available-for-sale securities
Subprime mortgage-backed available-for-sale securities	$ 0	$ 0	$ 0

Investment Securities (Schedu_3

Investment Securities (Schedule of Available-for-Sale Investment Securities Gross Gains and Gross Losses Realized) (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Realized gains on investment securities	$ 6,000	$ 7,000	$ 611,000	$ 265,000
Realized losses on investment securities	(6,000)	(7,000)	(51,000)	(14,000)
Net realized gains on investment securities	0	0	560,000	251,000
Unrealized gains on equity securities with readily determinable fair value	684,000	2,000	2,974,000	182,000
Unrealized losses on equity securities with readily determinable fair value	(684,000)	(4,013,000)	(2,136,000)	(6,655,000)
Net unrealized gains (losses) on equity securities with readily determinable fair value	0	(4,011,000)	838,000	(6,473,000)
Upward adjustments of equity securities without readily determinable fair values	0	0	0	0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	0	(3,786,000)	0	(4,357,000)
Adjustment and impairment, net, of equity securities without readily determinable fair values	0	(3,786,000)	0	(4,357,000)
Gains (losses) on investment securities, net	0	(7,797,000)	1,398,000	(10,579,000)
Proceeds from sales of available-for-sale securities	0	0	0	0
Proceeds from sales of equity securities with readily determinable fair value	0	0	23,592,000	18,753,000
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	$ 0	$ 279,000	$ 67,000	$ 529,000

Investment Securities (Contract

Investment Securities (Contractual Maturities of Investment Securities) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Available-for-sale securities
Due in one year or less, amortized cost	$ 93,724	$ 119,830	$ 55,058
Due in one to five years, amortized cost	138,704	63,644	75,941
Due in five to ten years, amortized cost	41,655	115,734	115,378
Due after ten years, amortized cost	64,452	64,590	68,885
Amortized Cost	4,018,851	3,769,634	3,331,501
Due in one year or less, fair value	93,137	119,275	54,824
Due in one to five years, fair value	126,776	61,701	74,559
Due in five to ten years, fair value	36,315	105,076	109,492
Due after ten years, fair value	57,518	57,478	65,730
Fair Value	3,492,481	3,243,017	2,970,121
Held-to-maturity securities
Held-to-maturity securities, due in one year or less, amortized cost	2,479	1,340	1,457
Held-to-maturity securities, due in one to five years, amortized cost	102,182	94,705	84,906
Held-to-maturity securities, due in five to ten years, amortized cost	106,708	115,318	105,450
Held-to-maturity securities, due after ten years, amortized cost	362,252	365,510	331,034
Amortized Cost	3,564,879	3,641,055	3,413,552
Less: Allowance for credit losses	(406)	(488)	(83)
Held-to-maturity securities, net of allowance for credit losses	3,564,473	3,640,567	3,413,469
Held-to-maturity securities, due in one year or less, fair value	2,475	1,332	1,458
Held-to-maturity securities, due in one to five years, fair value	96,806	89,093	80,705
Held-to-maturity securities, due in five to ten years, fair value	105,054	113,758	105,491
Held-to-maturity securities, due after ten years, fair value	289,426	288,460	276,214
Fair Value	2,887,891	2,949,821	2,900,269
Mortgage-backed
Available-for-sale securities
Mortgage-backed, without single maturity date, amortized cost	3,680,316	3,405,836	3,016,239
Mortgage-backed, without single maturity date, fair value	3,178,735	2,899,487	2,665,516
Held-to-maturity securities
Mortgage-backed, amortized cost	2,991,258	3,064,182	2,890,705
Mortgage-backed, fair value	$ 2,394,130	$ 2,457,178	$ 2,436,401

Loans (Summary of Loan Portfoli

Loans (Summary of Loan Portfolio) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Loans [Line Items]
Total loans, net of unearned income	$ 41,023,408	$ 39,196,485	$ 37,053,103
Total loans, net of unearned income, percentage	100%	100%	100%
Commercial
Loans [Line Items]
Total loans, net of unearned income	$ 12,600,471	$ 12,549,164	$ 12,047,105
Total loans, net of unearned income, percentage	31%	32%	32%
Commercial real estate
Loans [Line Items]
Total loans, net of unearned income	$ 10,608,811	$ 9,950,947	$ 9,407,205
Total loans, net of unearned income, percentage	26%	25%	25%
Home equity
Loans [Line Items]
Total loans, net of unearned income	$ 336,974	$ 332,698	$ 325,826
Total loans, net of unearned income, percentage	1%	1%	1%
Residential real estate
Loans [Line Items]
Total loans, net of unearned income	$ 2,643,240	$ 2,372,383	$ 2,078,907
Total loans, net of unearned income, percentage	6%	6%	6%
Premium finance receivables \| Property and casualty insurance
Loans [Line Items]
Total loans, net of unearned income	$ 6,762,698	$ 5,849,459	$ 5,541,447
Total loans, net of unearned income, percentage	16%	15%	15%
Premium finance receivables \| Life insurance
Loans [Line Items]
Total loans, net of unearned income	$ 8,039,273	$ 8,090,998	$ 7,608,433
Total loans, net of unearned income, percentage	20%	21%	21%
Consumer and other
Loans [Line Items]
Total loans, net of unearned income	$ 31,941	$ 50,836	$ 44,180
Total loans, net of unearned income, percentage	0%	0%	0%

Loans (Narrative) (Detail)

Loans (Narrative) (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Loans [Line Items]
Net deferred loan fees and costs and fair value accounting adjustments	$ 72.8	$ 71.8	$ 70.2
Premium finance receivables
Loans [Line Items]
Unearned income portion of premium finance receivables	$ 281.7	$ 224.5	$ 160.6

Allowance for Credit Losses (Na

Allowance for Credit Losses (Narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
Allowance for Credit Losses (Narrative) (Details)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) contract	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) contract	Jun. 30, 2022 USD ($) contract	Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest related to financial assets held at amortized cost	$ 267,300,000	$ 130,900,000	$ 267,300,000	$ 130,900,000	$ 130,900,000	$ 214,000,000
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	Accrued interest receivable and other	Accrued interest receivable and other	Accrued interest receivable and other
Nonaccrual loans with no related allowance for credit losses	$ 23,500,000		$ 23,500,000
Provision for credit losses	28,571,000	$ 20,493,000	51,641,000	$ 24,518,000
Loan net charge-offs	17,000,000	$ 22,500,000	17,000,000	$ 22,500,000
Provision for credit losses	(57,000)		(82,000)
Foreclosed residential real estate properties	318,000		318,000
TDRs, count \| contract		16		29	57
TDRs, balance		$ 2,421,000		$ 5,518,000	$ 13,061,000
Weighted average extension term		63 months
Weighted average decrease in stated interest rate		0.96%
Loan forgiveness		$ 0
Financing Receivable \| Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded investment, foreclosure proceedings in process	$ 50,400,000	$ 10,900,000	$ 50,400,000	$ 10,900,000	$ 10,900,000

Allowance for Credit Losses (Sc

Allowance for Credit Losses (Schedule of Aging of the Company's Loan Portfolio) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 93,666	$ 98,379	$ 89,694
Loans, net of unearned income	41,023,408	39,196,485	37,053,103
Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Nonaccrual	117	31,279	23,815
Loans, net of unearned income	187,848	164,788	113,856
Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual	40,460	35,579	32,436
Loans, net of unearned income	12,600,471	12,549,164	12,047,105
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	10,608,811	9,950,947	9,407,205
Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Nonaccrual	12,536	416	889
Loans, net of unearned income	1,760,436	1,486,930	1,506,318
Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Nonaccrual	5,947	5,971	9,829
Loans, net of unearned income	8,848,375	8,464,017	7,900,887
Home equity
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,361	1,487	1,084
Loans, net of unearned income	336,974	332,698	325,826
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,643,240	2,372,383	2,078,907
Residential real estate \| Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	13,652	10,171	8,330
Loans, net of unearned income	2,455,392	2,207,595	1,965,051
Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	19,583	13,470	13,303
Loans, net of unearned income	6,762,698	5,849,459	5,541,447
Premium finance receivables \| Life insurance loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	6	0	0
Loans, net of unearned income	8,039,273	8,090,998	7,608,433
Consumer and other
Financing Receivable, Past Due [Line Items]
Nonaccrual	4	6	8
Loans, net of unearned income	31,941	50,836	44,180
Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	93,549	67,100	65,879
Loans, net of unearned income	40,835,560	39,031,697	36,939,247
90+ days and still accruing
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	72,891	81,047	56,786
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	57,728	47,450	50,314
90+ days and still accruing \| Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	573	462	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 \| Construction and development
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	110	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	0
90+ days and still accruing \| Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	12,785	15,841	6,447
90+ days and still accruing \| Premium finance receivables \| Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,667	17,245	0
90+ days and still accruing \| Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	28	49	25
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	15,163	33,597	6,472
60-89 days past due
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	58,789	48,924	41,623
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	918	984	272
60-89 days past due \| Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	22,808	21,128	16,789
60-89 days past due \| Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	361	0
60-89 days past due \| Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,054	1,883	6,771
60-89 days past due \| Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	316	0	154
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	7,243	4,364	534
60-89 days past due \| Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	22,670	14,926	15,299
60-89 days past due \| Premium finance receivables \| Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	3,729	5,260	1,796
60-89 days past due \| Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	51	18	8
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	57,871	47,940	41,351
30-59 days past due
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	187,675	210,595	138,004
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	0	1,584	0
30-59 days past due \| Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	48,970	56,696	14,120
30-59 days past due \| Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	766	14,390	1,144
30-59 days past due \| Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	13,452	16,285	33,076
30-59 days past due \| Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	601	2,152	930
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	872	9,982	147
30-59 days past due \| Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	32,751	40,557	23,313
30-59 days past due \| Premium finance receivables \| Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	90,117	68,725	65,155
30-59 days past due \| Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	146	224	119
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	187,675	209,011	138,004
Current
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	40,610,387	38,757,540	36,726,996
Current \| Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	129,085	83,491	39,455
Current \| Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	12,487,660	12,435,299	11,983,760
Current \| Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,747,134	1,471,763	1,504,285
Current \| Commercial real estate \| Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	8,827,922	8,439,878	7,851,211
Current \| Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	334,586	329,059	323,658
Current \| Residential real estate \| Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,433,625	2,183,078	1,956,040
Current \| Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	6,674,909	5,764,665	5,483,085
Current \| Premium finance receivables \| Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	7,943,754	7,999,768	7,541,482
Current \| Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	31,712	50,539	44,020
Current \| Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	$ 40,481,302	$ 38,674,049	$ 36,687,541

Allowance for Credit Losses (Lo

Allowance for Credit Losses (Loan Portfolio by Credit Quality Indicator) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 8,564,484		$ 8,564,484
2022	7,252,803		7,252,803
2021	5,667,743		5,667,743
2020	3,373,713		3,373,713
2019	2,640,351		2,640,351
Prior	8,787,735		8,787,735
Revolving	4,729,231		4,729,231
Revolving to term	7,348		7,348
Total Loans	41,023,408	$ 37,053,103	41,023,408	$ 37,053,103	$ 39,196,485
Three months ended June 30, 2023
2023	4,963		5,441
2022	569		5,462
2021	1,055		2,249
2020	5,159		5,496
2019	5,014		5,332
Prior	1,756		1,887
Revolving	0		0
Revolving to term	0		0
Total loans	18,516	12,316	25,867	17,041
Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,440,041		1,440,041
2022	2,383,830		2,383,830
2021	2,010,204		2,010,204
2020	853,478		853,478
2019	591,180		591,180
Prior	1,144,241		1,144,241
Revolving	4,172,175		4,172,175
Revolving to term	5,322		5,322
Total Loans	12,600,471		12,600,471
Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2023	137,138		137,138
2022	630,254		630,254
2021	480,750		480,750
2020	217,976		217,976
2019	133,762		133,762
Prior	143,640		143,640
Revolving	16,549		16,549
Revolving to term	367		367
Total Loans	1,760,436		1,760,436
Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	827,343		827,343
2022	1,863,571		1,863,571
2021	1,455,401		1,455,401
2020	994,009		994,009
2019	826,083		826,083
Prior	2,686,478		2,686,478
Revolving	194,075		194,075
Revolving to term	1,415		1,415
Total Loans	8,848,375		8,848,375
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	230		230
2021	140		140
2020	115		115
2019	170		170
Prior	15,503		15,503
Revolving	320,572		320,572
Revolving to term	244		244
Total Loans	336,974	325,826	336,974	325,826	332,698
Three months ended June 30, 2023
Total loans	0	192	0	389
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	255,281		255,281
2022	833,977		833,977
2021	817,113		817,113
2020	233,982		233,982
2019	138,459		138,459
Prior	364,428		364,428
Revolving	0		0
Revolving to term	0		0
Total Loans	2,643,240	2,078,907	2,643,240	2,078,907	2,372,383
Three months ended June 30, 2023
Total loans	0	0	0	466
Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2023	5,776,598		5,776,598
2022	954,597		954,597
2021	27,115		27,115
2020	4,027		4,027
2019	361		361
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	6,762,698		6,762,698
Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2023	125,737		125,737
2022	584,418		584,418
2021	875,939		875,939
2020	1,069,963		1,069,963
2019	949,935		949,935
Prior	4,433,281		4,433,281
Revolving	0		0
Revolving to term	0		0
Total Loans	8,039,273		8,039,273
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,346		2,346
2022	1,926		1,926
2021	1,081		1,081
2020	163		163
2019	401		401
Prior	164		164
Revolving	25,860		25,860
Revolving to term	0		0
Total Loans	31,941	44,180	31,941	44,180	$ 50,836
Three months ended June 30, 2023
Total loans	110	$ 253	263	$ 446
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023	8,415,552		8,415,552
2022	7,115,976		7,115,976
2021	5,507,661		5,507,661
2020	3,295,495		3,295,495
2019	2,501,393		2,501,393
Prior	8,356,887		8,356,887
Revolving	4,569,009		4,569,009
Revolving to term	5,394		5,394
Total Loans	39,767,367		39,767,367
Pass \| Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,432,042		1,432,042
2022	2,302,642		2,302,642
2021	1,892,615		1,892,615
2020	842,764		842,764
2019	536,136		536,136
Prior	1,091,823		1,091,823
Revolving	4,016,909		4,016,909
Revolving to term	3,612		3,612
Total Loans	12,118,543		12,118,543
Pass \| Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2023	137,138		137,138
2022	623,589		623,589
2021	479,051		479,051
2020	191,308		191,308
2019	110,298		110,298
Prior	115,876		115,876
Revolving	16,549		16,549
Revolving to term	367		367
Total Loans	1,674,176		1,674,176
Pass \| Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	824,864		824,864
2022	1,857,052		1,857,052
2021	1,423,876		1,423,876
2020	972,603		972,603
2019	788,128		788,128
Prior	2,549,042		2,549,042
Revolving	192,636		192,636
Revolving to term	1,415		1,415
Total Loans	8,609,616		8,609,616
Pass \| Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	63		63
2020	0		0
2019	93		93
Prior	6,207		6,207
Revolving	317,066		317,066
Revolving to term	0		0
Total Loans	323,429		323,429
Pass \| Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	254,659		254,659
2022	827,009		827,009
2021	809,152		809,152
2020	221,005		221,005
2019	116,043		116,043
Prior	189,815		189,815
Revolving	0		0
Revolving to term	0		0
Total Loans	2,417,683		2,417,683
Pass \| Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2023	5,638,768		5,638,768
2022	919,368		919,368
2021	26,646		26,646
2020	4,012		4,012
2019	361		361
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	6,589,155		6,589,155
Pass \| Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2023	125,737		125,737
2022	584,412		584,412
2021	875,181		875,181
2020	1,063,640		1,063,640
2019	949,935		949,935
Prior	4,404,124		4,404,124
Revolving	0		0
Revolving to term	0		0
Total Loans	8,003,029		8,003,029
Pass \| Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,344		2,344
2022	1,904		1,904
2021	1,077		1,077
2020	163		163
2019	399		399
Prior	0		0
Revolving	25,849		25,849
Revolving to term	0		0
Total Loans	31,736		31,736
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	137,529		137,529
2022	70,190		70,190
2021	104,397		104,397
2020	31,797		31,797
2019	64,992		64,992
Prior	121,004		121,004
Revolving	98,228		98,228
Revolving to term	1,328		1,328
Total Loans	629,465		629,465
Special mention \| Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	4,953		4,953
2022	44,081		44,081
2021	72,155		72,155
2020	5,689		5,689
2019	18,040		18,040
Prior	6,820		6,820
Revolving	94,418		94,418
Revolving to term	1,328		1,328
Total Loans	247,484		247,484
Special mention \| Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	1,699		1,699
2020	18,420		18,420
2019	20,000		20,000
Prior	14,250		14,250
Revolving	0		0
Revolving to term	0		0
Total Loans	54,369		54,369
Special mention \| Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,479		2,479
2022	5,088		5,088
2021	28,536		28,536
2020	0		0
2019	26,357		26,357
Prior	63,570		63,570
Revolving	1,439		1,439
Revolving to term	0		0
Total Loans	127,469		127,469
Special mention \| Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	230		230
2021	0		0
2020	0		0
2019	59		59
Prior	1,763		1,763
Revolving	2,370		2,370
Revolving to term	0		0
Total Loans	4,422		4,422
Special mention \| Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	39		39
2022	3,470		3,470
2021	994		994
2020	1,355		1,355
2019	534		534
Prior	5,317		5,317
Revolving	0		0
Revolving to term	0		0
Total Loans	11,709		11,709
Special mention \| Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2023	130,056		130,056
2022	17,308		17,308
2021	255		255
2020	10		10
2019	0		0
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	147,629		147,629
Special mention \| Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	758		758
2020	6,323		6,323
2019	0		0
Prior	29,157		29,157
Revolving	0		0
Revolving to term	0		0
Total Loans	36,238		36,238
Special mention \| Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2		2
2022	13		13
2021	0		0
2020	0		0
2019	2		2
Prior	127		127
Revolving	1		1
Revolving to term	0		0
Total Loans	145		145
Substandard accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2023	6,849		6,849
2022	45,594		45,594
2021	47,200		47,200
2020	25,748		25,748
2019	24,285		24,285
Prior	133,262		133,262
Revolving	61,731		61,731
Revolving to term	510		510
Total Loans	345,179		345,179
Substandard accrual \| Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,046		3,046
2022	36,007		36,007
2021	39,858		39,858
2020	3,177		3,177
2019	9,549		9,549
Prior	41,282		41,282
Revolving	60,683		60,683
Revolving to term	382		382
Total Loans	193,984		193,984
Substandard accrual \| Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	2,475		2,475
2021	0		0
2020	0		0
2019	3,464		3,464
Prior	13,416		13,416
Revolving	0		0
Revolving to term	0		0
Total Loans	19,355		19,355
Substandard accrual \| Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	1,431		1,431
2021	2,964		2,964
2020	21,406		21,406
2019	11,012		11,012
Prior	68,530		68,530
Revolving	0		0
Revolving to term	0		0
Total Loans	105,343		105,343
Substandard accrual \| Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	0		0
Prior	6,596		6,596
Revolving	1,038		1,038
Revolving to term	128		128
Total Loans	7,762		7,762
Substandard accrual \| Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	583		583
2022	2,562		2,562
2021	4,377		4,377
2020	1,165		1,165
2019	260		260
Prior	3,401		3,401
Revolving	0		0
Revolving to term	0		0
Total Loans	12,348		12,348
Substandard accrual \| Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,220		3,220
2022	3,110		3,110
2021	1		1
2020	0		0
2019	0		0
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	6,331		6,331
Substandard accrual \| Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	0		0
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	0		0
Substandard accrual \| Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	9		9
2021	0		0
2020	0		0
2019	0		0
Prior	37		37
Revolving	10		10
Revolving to term	0		0
Total Loans	56		56
Substandard nonaccrual/doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	4,554		4,554
2022	21,019		21,019
2021	7,101		7,101
2020	10,960		10,960
2019	30,556		30,556
Prior	18,980		18,980
Revolving	263		263
Revolving to term	116		116
Total Loans	93,549		93,549
Substandard nonaccrual/doubtful \| Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	1,100		1,100
2021	5,576		5,576
2020	1,848		1,848
2019	27,455		27,455
Prior	4,316		4,316
Revolving	165		165
Revolving to term	0		0
Total Loans	40,460		40,460
Substandard nonaccrual/doubtful \| Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	4,190		4,190
2021	0		0
2020	8,248		8,248
2019	0		0
Prior	98		98
Revolving	0		0
Revolving to term	0		0
Total Loans	12,536		12,536
Substandard nonaccrual/doubtful \| Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	25		25
2020	0		0
2019	586		586
Prior	5,336		5,336
Revolving	0		0
Revolving to term	0		0
Total Loans	5,947		5,947
Substandard nonaccrual/doubtful \| Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	77		77
2020	115		115
2019	18		18
Prior	937		937
Revolving	98		98
Revolving to term	116		116
Total Loans	1,361		1,361
Substandard nonaccrual/doubtful \| Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	912		912
2021	1,206		1,206
2020	744		744
2019	2,497		2,497
Prior	8,293		8,293
Revolving	0		0
Revolving to term	0		0
Total Loans	13,652		13,652
Substandard nonaccrual/doubtful \| Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2023	4,554		4,554
2022	14,811		14,811
2021	213		213
2020	5		5
2019	0		0
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	19,583		19,583
Substandard nonaccrual/doubtful \| Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	6		6
2021	0		0
2020	0		0
2019	0		0
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	6		6
Substandard nonaccrual/doubtful \| Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	0		0
2021	4		4
2020	0		0
2019	0		0
Prior	0		0
Revolving	0		0
Revolving to term	0		0
Total Loans	4		4
Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	24		24
2021	1,384		1,384
2020	9,713		9,713
2019	19,125		19,125
Prior	157,602		157,602
Revolving	0		0
Revolving to term	0		0
Total Loans	187,848		187,848
Early buy-out loans guaranteed by U.S. government agencies \| Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0
2022	24		24
2021	1,384		1,384
2020	9,713		9,713
2019	19,125		19,125
Prior	157,602		157,602
Revolving	0		0
Revolving to term	0		0
Total Loans	$ 187,848		$ 187,848

Allowance for Credit Losses (He

Allowance for Credit Losses (Held-to-Maturity Debt Securities by Credit Quality Indication) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	$ 3,564,879	$ 3,641,055	$ 3,413,552
Less: Allowance for credit losses	(406)	(488)	(83)
Held-to-maturity securities, net of allowance for credit losses	3,564,473	3,640,567	3,413,469
U.S. government agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	160,000
2021	147,806
2020	25,000
2019	4,000
Prior	2,798
Amortized Cost	339,604	339,614	294,631
U.S. government agencies \| 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	160,000
2021	147,806
2020	25,000
2019	4,000
Prior	2,798
Amortized Cost	339,604
U.S. government agencies \| 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023
2022
2021
2020
2019
Prior
Amortized Cost	0
U.S. government agencies \| 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023
2022
2021
2020
2019
Prior
Amortized Cost	0
Municipal
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	1,996
2022	1,041
2021	6,955
2020	264
2019	616
Prior	165,256
Amortized Cost	176,128	$ 179,027	$ 179,642
Municipal \| 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	1,996
2022	1,041
2021	6,955
2020	264
2019	616
Prior	165,256
Amortized Cost	176,128
Municipal \| 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Amortized Cost	0
Municipal \| 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Amortized Cost	0
Mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	5,065
2022	595,015
2021	2,391,178
2020	0
2019	0
Prior	0
Amortized Cost	2,991,258
Mortgage-backed securities \| 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	5,065
2022	595,015
2021	2,391,178
2020	0
2019	0
Prior	0
Amortized Cost	2,991,258
Mortgage-backed securities \| 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Amortized Cost	0
Mortgage-backed securities \| 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Amortized Cost	0
Corporate notes
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	14,964
2021	0
2020	6,008
2019	7,269
Prior	29,648
Amortized Cost	57,889
Corporate notes \| 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	14,964
2021	0
2020	6,008
2019	7,269
Prior	29,648
Amortized Cost	57,889
Corporate notes \| 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Amortized Cost	0
Corporate notes \| 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Amortized Cost	$ 0

Allowance for Credit Losses (Co

Allowance for Credit Losses (Components of Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	$ 387,380	$ 375,798	$ 357,448	$ 312,109	$ 301,168	$ 299,653
Allowance for held-to-maturity securities losses	406		488	83
Allowance for credit losses	387,786		357,936	312,192
Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	302,499		270,173	251,769
Unfunded lending-related commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	84,881		87,275	60,340
Loans and unfunded lending-related commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	$ 387,380		$ 357,448	$ 312,109

Allowance for Credit Losses (Su

Allowance for Credit Losses (Summary of Activity in the Allowance for Credit Losses by Loan Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	$ 375,798	$ 301,168	$ 357,448	$ 299,653	$ 299,653
Other adjustments	41	(56)	45	(34)
Charge-offs	(18,516)	(12,316)	(25,867)	(17,041)
Recoveries	1,486	2,820	3,372	5,013
Provision for credit losses	28,571	20,493	51,641	24,518
Allowance for credit losses at period end	387,380	312,109	$ 387,380	312,109	$ 357,448
Cumulative effect adjustment from the adoption of ASU 2016-13, net of tax			Accounting Standards Update 2016-13 [Member]		Accounting Standards Update 2022-02
Individually measured	13,130	6,668	$ 13,130	6,668
Collectively measured	374,250	305,441	374,250	305,441
Loans at period end, individually evaluated for impairment	73,804	85,557	73,804	85,557
Loans at period end, collectively evaluated for impairment	40,749,157	36,844,789	40,749,157	36,844,789
Loans held-for-investment	200,447	122,757	200,447	122,757
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	149,501	120,911	142,769	119,307	119,307
Other adjustments	0	0	0	0
Charge-offs	(5,629)	(8,928)	(8,172)	(10,342)
Recoveries	505	996	897	1,534
Provision for credit losses	(1,235)	29,940	7,537	32,420
Allowance for credit losses at period end	143,142	142,919	143,142	142,919	142,769
Individually measured	7,205	5,674	7,205	5,674
Collectively measured	135,937	137,245	135,937	137,245
Loans at period end, individually evaluated for impairment	40,460	34,892	40,460	34,892
Loans at period end, collectively evaluated for impairment	12,560,011	12,012,213	12,560,011	12,012,213
Loans held-for-investment	0	0	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	194,780	144,906	184,352	144,583	144,583
Other adjustments	0	0	0	0
Charge-offs	(8,124)	(40)	(8,129)	(817)
Recoveries	25	553	125	585
Provision for credit losses	29,015	(1,687)	37,992	(619)
Allowance for credit losses at period end	215,696	143,732	215,696	143,732	184,352
Individually measured	5,819	99	5,819	99
Collectively measured	209,877	143,633	209,877	143,633
Loans at period end, individually evaluated for impairment	18,483	20,377	18,483	20,377
Loans at period end, collectively evaluated for impairment	10,590,328	9,386,828	10,590,328	9,386,828
Loans held-for-investment	0	0	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	7,728	10,566	7,573	10,699	10,699
Other adjustments	0	0	0	0
Charge-offs	0	(192)	0	(389)
Recoveries	37	123	72	216
Provision for credit losses	(798)	(3,507)	(645)	(3,536)
Allowance for credit losses at period end	6,967	6,990	6,967	6,990	7,573
Individually measured	0	105	0	105
Collectively measured	6,967	6,885	6,967	6,885
Loans at period end, individually evaluated for impairment	1,361	11,876	1,361	11,876
Loans at period end, collectively evaluated for impairment	335,613	313,950	335,613	313,950
Loans held-for-investment	0	0	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	11,434	9,429	11,585	8,782	8,782
Other adjustments	0	0	0	0
Charge-offs	0	0	0	(466)
Recoveries	6	6	10	11
Provision for credit losses	812	1,044	1,349	2,152
Allowance for credit losses at period end	12,252	10,479	12,252	10,479	11,585
Individually measured	106	790	106	790
Collectively measured	12,146	9,689	12,146	9,689
Loans at period end, individually evaluated for impairment	13,496	18,333	13,496	18,333
Loans at period end, collectively evaluated for impairment	2,429,297	1,937,817	2,429,297	1,937,817
Loans held-for-investment	200,447	122,757	200,447	122,757
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	11,955	14,722	10,671	15,859	15,859
Other adjustments	41	(56)	45	(34)
Charge-offs	(4,653)	(2,903)	(9,303)	(4,581)
Recoveries	890	1,119	2,213	2,595
Provision for credit losses	813	(5,380)	5,420	(6,337)
Allowance for credit losses at period end	9,046	7,502	9,046	7,502	10,671
Individually measured	0	0	0	0
Collectively measured	9,046	7,502	9,046	7,502
Loans at period end, individually evaluated for impairment	0	0	0	0
Loans at period end, collectively evaluated for impairment	14,801,971	13,149,880	14,801,971	13,149,880
Loans held-for-investment	0	0	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	400	634	498	423	423
Other adjustments	0	0	0	0
Charge-offs	(110)	(253)	(263)	(446)
Recoveries	23	23	55	72
Provision for credit losses	(36)	83	(12)	438
Allowance for credit losses at period end	277	487	277	487	498
Individually measured	0	0	0	0
Collectively measured	277	487	277	487
Loans at period end, individually evaluated for impairment	4	79	4	79
Loans at period end, collectively evaluated for impairment	31,937	44,101	31,937	44,101
Loans held-for-investment	$ 0	$ 0	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)

Allowance for Credit Losses (_2

Allowance for Credit Losses (Summary of the Post-Modification Balance of Loans Experiencing Financial Difficulties) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 5,063	$ 45,792
Percentage of Total Class of Loan	0%	0.10%
Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 143	$ 4,007
Duration of term	43 months	36 months
Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 1,319
Reduction of interest rate	2.07%	2.23%
Delay in Contractual Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 35,304
Duration of term		17 months
Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	4,920	$ 5,162
Commercial \| Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 423	$ 37,897
Percentage of Total Class of Loan	0%	0.30%
Commercial \| Commercial, industrial and other \| Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 1,938
Commercial \| Commercial, industrial and other \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	221
Commercial \| Commercial, industrial and other \| Delay in Contractual Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	35,265
Commercial \| Commercial, industrial and other \| Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	423	473
Commercial real estate \| Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 4,376	$ 5,709
Percentage of Total Class of Loan	0%	0.10%
Commercial real estate \| Non-construction \| Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 467
Commercial real estate \| Non-construction \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	827
Commercial real estate \| Non-construction \| Delay in Contractual Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	39
Commercial real estate \| Non-construction \| Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	4,376	4,376
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 203
Percentage of Total Class of Loan	0%	0.10%
Home equity \| Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 203
Home equity \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
Home equity \| Delay in Contractual Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
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	$ 264	$ 1,972
Percentage of Total Class of Loan	0%	0.10%
Residential real estate \| Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 143	$ 1,396
Residential real estate \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	271
Residential real estate \| Delay in Contractual Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
Residential real estate \| Extended of Term and Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	121	305
Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 11
Percentage of Total Class of Loan	0%	0%
Premium finance receivables \| Property and casualty insurance loans \| Extension of Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	$ 0	$ 3
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
Premium finance receivables \| Property and casualty insurance loans \| Delay in Contractual Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification loan balances	0	0
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

Allowance for Credit Losses (_3

Allowance for Credit Losses (Summary of Loans Experiencing Financial Difficulties Subsequently Defaulted) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms		$ 45,792
Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms	$ 20,407	20,407
Commercial \| Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms		37,897
Commercial \| Commercial, industrial and other \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms	18,729	18,729
Commercial real estate \| Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms		5,709
Commercial real estate \| Non-construction \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms	923	923
Home equity \| Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms		203
Home equity \| Commercial, industrial and other \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms	203	203
Residential real estate \| Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms		1,972
Residential real estate \| Commercial, industrial and other \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms	541	541
Premium finance receivables \| Property and casualty insurance loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms		11
Premium finance receivables \| Property and casualty insurance loans \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans in payment default under restructured terms	$ 11	$ 11

Allowance for Credit Losses (_4

Allowance for Credit Losses (Summary of the Post-Modification Balance of Loans Restructured) (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) contract	Jun. 30, 2022 USD ($) contract	Jun. 30, 2022 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	16	29	57
TDRs, balance \| $	$ 2,421	$ 5,518	$ 13,061
Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	16	27
TDRs, balance \| $	$ 2,420	$ 4,626
Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	10	19
TDRs, balance \| $	$ 1,805	$ 3,830
Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	4
TDRs, balance \| $	$ 0	$ 2,154
Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	0
TDRs, balance \| $	$ 0	$ 0
Commercial, industrial and other \| Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	2	5	16
TDRs, balance \| $	$ 186	$ 468	$ 4,995
Commercial, industrial and other \| Commercial, industrial and other \| Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	2	4
TDRs, balance \| $	$ 185	$ 305
Commercial, industrial and other \| Commercial, industrial and other \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	1
TDRs, balance \| $	$ 0	$ 85
Commercial, industrial and other \| Commercial, industrial and other \| Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	2
TDRs, balance \| $	$ 0	$ 247
Commercial, industrial and other \| Commercial, industrial and other \| Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	0
TDRs, balance \| $	$ 0	$ 0
Commercial real estate \| Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	2	2
TDRs, balance \| $	$ 0	$ 1,907	$ 1,907
Commercial real estate \| Non-construction \| Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	1
TDRs, balance \| $	$ 0	$ 1,178
Commercial real estate \| Non-construction \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	1
TDRs, balance \| $	$ 0	$ 1,178
Commercial real estate \| Non-construction \| Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	2
TDRs, balance \| $	$ 0	$ 1,907
Commercial real estate \| Non-construction \| Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	0
TDRs, balance \| $	$ 0	$ 0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	14	22	39
TDRs, balance \| $	$ 2,235	$ 3,143	$ 6,159
Residential real estate \| Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	14	22
TDRs, balance \| $	$ 2,235	$ 3,143
Residential real estate \| Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	10	17
TDRs, balance \| $	$ 1,805	$ 2,567
Residential real estate \| Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	0
TDRs, balance \| $	$ 0	$ 0
Residential real estate \| Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	0
TDRs, balance \| $	$ 0	$ 0

Allowance for Credit Losses (_5

Allowance for Credit Losses (Summary of Loans Restructured and Subsequently Defaulted Under the Restructured Terms) (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) contract	Jun. 30, 2022 USD ($) contract	Jun. 30, 2022 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	16	29	57
TDRs, balance \| $	$ 2,421	$ 5,518	$ 13,061
Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	12	13
TDRs, balance \| $	$ 4,814	$ 5,056
Commercial, industrial and other \| Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	2	5	16
TDRs, balance \| $	$ 186	$ 468	$ 4,995
Commercial, industrial and other \| Commercial, industrial and other \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	10	11
TDRs, balance \| $	$ 4,469	$ 4,711
Commercial real estate \| Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	2	2
TDRs, balance \| $	$ 0	$ 1,907	$ 1,907
Commercial real estate \| Non-construction \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	0	0
TDRs, balance \| $	$ 0	$ 0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	14	22	39
TDRs, balance \| $	$ 2,235	$ 3,143	$ 6,159
Residential real estate \| Payments in Default
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count \| contract	2	2
TDRs, balance \| $	$ 345	$ 345

Goodwill and Other Acquisitio_3

Goodwill and Other Acquisition-Related Intangible Assets (Goodwill Assets by Business Segment) (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 653,524
Goodwill Acquired	2,622
Impairment Loss	0
Goodwill Adjustments	528
Ending balance	656,674
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	38,480
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	528
Ending balance	39,008
Wealth management
Goodwill [Roll Forward]
Beginning balance	69,373
Goodwill Acquired	2,622
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 71,995

Goodwill and Other Acquisitio_4

Goodwill and Other Acquisition-Related Intangible Assets (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Indefinite-lived Intangible Assets [Line Items]
Goodwill recorded on acquisition			$ 2,622
Amortization of other acquisition-related intangible assets	$ 1,499	$ 1,579	2,734	$ 3,188
Wealth management
Indefinite-lived Intangible Assets [Line Items]
Goodwill recorded on acquisition			$ 2,622
Wealth management \| Customer list and other intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets	10 years		10 years
Specialty finance
Indefinite-lived Intangible Assets [Line Items]
Goodwill recorded on acquisition			$ 0
Goodwill increase for foreign currency translation adjustments			$ 528
Specialty finance \| Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets	18 years		18 years
Community banking
Indefinite-lived Intangible Assets [Line Items]
Goodwill recorded on acquisition			$ 0
Community banking \| Core deposit intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets	10 years		10 years

Goodwill and Other Acquisitio_5

Goodwill and Other Acquisition-Related Intangible Assets (Summary of Intangible Assets) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Intangibles with finite lives
Accumulated amortization	$ (63,946)	$ (61,212)	$ (58,284)
Intangibles with indefinite lives
Gross carrying amount	89,599	83,398	83,402
Total net carrying amount	25,653	22,186	25,118
Community banking
Intangibles with indefinite lives
Total net carrying amount	16,574	18,505	20,602
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	(44,432)	(42,501)	(40,404)
Net carrying amount	10,774	12,705	14,802
Specialty finance \| Customer list intangibles
Intangibles with finite lives
Gross carrying amount	1,963	1,962	1,966
Accumulated amortization	(1,813)	(1,785)	(1,756)
Net carrying amount	150	177	210
Wealth management \| Customer list and other intangibles
Intangibles with finite lives
Gross carrying amount	26,630	20,430	20,430
Accumulated amortization	(17,701)	(16,926)	(16,124)
Net carrying amount	$ 8,929	$ 3,504	$ 4,306

Goodwill and Other Acquisitio_6

Goodwill and Other Acquisition-Related Intangible Assets (Estimated Amortization) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Actual in six months ended June 30, 2023	$ 1,499	$ 1,579	$ 2,734	$ 3,188
Estimated remaining in 2023	2,769		2,769
Estimated—2024	4,301		4,301
Estimated—2025	3,482		3,482
Estimated—2026	2,772		2,772
Estimated—2027	$ 2,157		$ 2,157

Mortgage Servicing Rights ("M_3

Mortgage Servicing Rights ("MSRs") (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value at beginning of the period	$ 224,470	$ 199,146	$ 230,225	$ 147,571
Additions from loans sold with servicing retained	8,720	11,210	13,827	25,611
Servicing rights sold	(30,170)	0	(30,170)	0
Estimate of changes in fair value due to:
Early buyout options (“EBO”) exercised	0	(1)	0	(176)
Payoffs and paydowns	(5,043)	(6,838)	(8,952)	(12,854)
Changes in valuation inputs or assumptions	2,715	9,147	(4,238)	52,512
Fair value at end of the period	200,692	212,664	200,692	212,664
Unpaid principal balance of mortgage loans serviced for others	$ 11,752,223	$ 13,643,623	$ 11,752,223	$ 13,643,623

Deposits (Detail)

Deposits (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Balance:
Non-interest-bearing	$ 10,604,915	$ 12,668,160	$ 13,855,844
NOW and interest-bearing demand deposits	5,814,836	5,591,986	5,918,908
Wealth management deposits	1,417,984	2,463,833	3,182,407
Money market	14,523,124	12,886,795	12,273,350
Savings	5,321,578	4,556,635	3,686,596
Time certificates of deposit	6,356,270	4,735,135	3,676,221
Total deposits	$ 44,038,707	$ 42,902,544	$ 42,593,326
Mix:
Non-interest-bearing	24%	30%	33%
NOW and interest-bearing demand deposits	13%	13%	13%
Wealth management deposits	3%	5%	7%
Money market	33%	30%	29%
Savings	12%	11%	9%
Time certificates of deposit	15%	11%	9%
Total deposits	100%	100%	100%

FHLB Advances, Other Borrowin_3

FHLB Advances, Other Borrowings and Subordinated Notes (Summary of Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Debt Disclosure [Abstract]
FHLB advances	$ 2,026,071	$ 2,316,071	$ 1,166,071
Other borrowings:
Notes payable	185,539	199,793	69,619
Short-term borrowings	17,773	17,612	16,418
Secured borrowings	326,348	317,942	334,467
Other	135,559	61,267	62,283
Total other borrowings	665,219	596,614	482,787
Subordinated notes	437,628	437,392	437,162
Total FHLB advances, other borrowings and subordinated notes	$ 3,128,918	$ 3,350,077	$ 2,086,020

FHLB Advances, Other Borrowin_4

FHLB Advances, Other Borrowings and Subordinated Notes (Narrative) (Details) - USD ($)		5 Months Ended	6 Months Ended
	May 31, 2023	May 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Dec. 12, 2022	Jun. 30, 2022	Sep. 18, 2018
Debt Instrument [Line Items]
Credit agreement balances			$ 185,539,000	$ 199,793,000		$ 69,619,000
Secured borrowings			326,348,000	317,942,000		334,467,000
Collateral Pledged
Debt Instrument [Line Items]
Pledged financial instruments			17,800,000
Securities sold under repurchase agreements \| Overnight Sweep Collateral
Debt Instrument [Line Items]
Securities sold under agreements to repurchase			16,273,000	17,600,000		16,400,000
Secured Debt
Debt Instrument [Line Items]
Secured borrowings			9,200,000
Term Loan Facility
Debt Instrument [Line Items]
Credit agreement balances					$ 200,000,000		$ 150,000,000
Amount outstanding			185,500,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit agreement balances							$ 100,000,000
Amount outstanding			0
Receivables Purchase Agreement \| Secured Debt
Debt Instrument [Line Items]
Secured borrowings			$ 317,100,000	$ 309,700,000		$ 326,000,000
Borrowing capacity	$ 520,000,000
Borrowing fee rate	0.825%	0.775%
Receivables Purchase Agreement \| Secured Debt \| Canadian Commercial Paper Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.825%

FHLB Advances, Other Borrowin_5

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	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Financial Instruments Owned and Pledged as Collateral [Line Items]
Excess collateral	$ 1,546
Securities sold under repurchase agreements	16,273	$ 17,600	$ 16,400
Mortgage-backed securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Mortgage-backed securities	$ 17,819

Junior Subordinated Debenture_2

Junior Subordinated Debentures (Summary of Junior Subordinated Debentures) (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
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
Average contractual rate	7.70%
Junior Subordinated Debt \| Wintrust Capital Trust III
Subordinated Borrowing [Line Items]
Common Securities	$ 774
Trust Preferred Securities	25,000
Junior subordinated debentures	$ 25,774
Contractual rate	8.51%
Junior Subordinated Debt \| Wintrust Capital Trust III \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	8.34%
Junior Subordinated Debt \| Wintrust Statutory Trust IV \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	8.14%
Junior Subordinated Debt \| Wintrust Statutory Trust V \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	7.50%
Junior Subordinated Debt \| Wintrust Capital Trust VII \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	6.99%
Junior Subordinated Debt \| Wintrust Capital Trust VIII \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	7.18%
Junior Subordinated Debt \| Wintrust Capital Trust IX \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	8.30%
Junior Subordinated Debt \| Northview Capital Trust I \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3%
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
Contractual rate	8.30%
Junior Subordinated Debt \| Town Bankshares Capital Trust I \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3%
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
Contractual rate	8.54%
Junior Subordinated Debt \| First Northwest Capital Trust I \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3%
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
Contractual rate	7.30%
Junior Subordinated Debt \| Suburban Illinois Capital Trust II \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	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
Contractual rate	7.17%
Junior Subordinated Debt \| Community Financial Shares Statutory Trust II \| London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	1.62%

Junior Subordinated Debenture_3

Junior Subordinated Debentures (Narrative) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
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	7.70%

Segment Information (Narrative)

Segment Information (Narrative) (Detail)	6 Months Ended
Segment Information (Narrative) (Detail)	Jun. 30, 2023 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

Segment Information (Summary of

Segment Information (Summary of Segment Information) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Net interest income:
Net interest income	$ 447,537	$ 337,804	$ 905,532	$ 637,098
Net interest income, change in contribution	$ 109,733		$ 268,434
Net interest income, percent change in contribution	32%		42%
Provision for credit losses:
Provision for credit losses	$ 28,514	20,417	$ 51,559	24,523
Provision for credit losses, change in contribution	$ 8,097		$ 27,036
Provision for credit losses, percent change in contribution	40%		110%
Non-interest income:
Non-interest income	$ 113,030	102,942	$ 220,799	265,732
Non-interest income, change in contribution	$ 10,088		$ (44,933)
Non-interest income, percent change in contribution	10%		(17.00%)
Net revenue:
Net revenue	$ 560,567	440,746	$ 1,126,331	902,830
Net revenue, change in contribution	$ 119,821		$ 223,501
Net revenue, percent change in contribution	27%		25%
Segment profit:
Segment profit	$ 154,750	94,513	$ 334,948	221,904
Segment profit, change in contribution	$ 60,237		$ 113,044
Segment profit, percent change in contribution	64%		51%
Segment assets:
Segment assets	$ 54,286,176	50,969,332	$ 54,286,176	50,969,332	$ 52,949,649
Segment assets, change in contribution	$ 3,316,844
Segment assets, percent change in contribution	7%
Community banking
Segment profit:
Segment profit	$ 102,517	54,647	236,749	144,746
Segment profit, change in contribution	$ 47,870		$ 92,003
Segment profit, percent change in contribution	88%		64%
Segment assets:
Segment assets	$ 42,452,673	40,098,458	$ 42,452,673	40,098,458
Segment assets, change in contribution	$ 2,354,215
Segment assets, percent change in contribution	6%
Specialty finance
Segment profit:
Segment profit	$ 46,402	30,558	83,139	60,162
Segment profit, change in contribution	$ 15,844		$ 22,977
Segment profit, percent change in contribution	52%		38%
Segment assets:
Segment assets	$ 10,549,819	9,207,215	$ 10,549,819	9,207,215
Segment assets, change in contribution	$ 1,342,604
Segment assets, percent change in contribution	15%
Wealth management
Segment profit:
Segment profit	$ 5,831	9,308	15,060	16,996
Segment profit, change in contribution	$ (3,477)		$ (1,936)
Segment profit, percent change in contribution	(37.00%)		(11.00%)
Segment assets:
Segment assets	$ 1,283,684	1,663,659	$ 1,283,684	1,663,659
Segment assets, change in contribution	$ (379,975)
Segment assets, percent change in contribution	(23.00%)
Operating Segments
Net interest income:
Net interest income	$ 438,629	329,978	887,783	622,339
Net interest income, change in contribution	$ 108,651		$ 265,444
Net interest income, percent change in contribution	33%		43%
Provision for credit losses:
Provision for credit losses	$ 28,514	20,417	$ 51,559	24,523
Provision for credit losses, change in contribution	$ 8,097		$ 27,036
Provision for credit losses, percent change in contribution	40%		110%
Non-interest income:
Non-interest income	$ 133,258	117,932	$ 258,078	294,520
Non-interest income, change in contribution	$ 15,326		$ (36,442)
Non-interest income, percent change in contribution	13%		(12.00%)
Net revenue:
Net revenue	$ 571,887	447,910	$ 1,145,861	916,859
Net revenue, change in contribution	$ 123,977		$ 229,002
Net revenue, percent change in contribution	28%		25%
Operating Segments \| Community banking
Net interest income:
Net interest income	$ 346,232	261,726	$ 716,080	490,341
Net interest income, change in contribution	$ 84,506		$ 225,739
Net interest income, percent change in contribution	32%		46%
Provision for credit losses:
Provision for credit losses	$ 26,713	20,225	$ 47,812	24,343
Provision for credit losses, change in contribution	$ 6,488		$ 23,469
Provision for credit losses, percent change in contribution	32%		96%
Non-interest income:
Non-interest income	$ 68,130	62,714	$ 136,863	184,602
Non-interest income, change in contribution	$ 5,416		$ (47,739)
Non-interest income, percent change in contribution	9%		(26.00%)
Net revenue:
Net revenue	$ 414,362	324,440	$ 852,943	674,943
Net revenue, change in contribution	$ 89,922		$ 178,000
Net revenue, percent change in contribution	28%		26%
Operating Segments \| Specialty finance
Net interest income:
Net interest income	$ 84,993	58,718	$ 155,344	114,088
Net interest income, change in contribution	$ 26,275		$ 41,256
Net interest income, percent change in contribution	45%		36%
Provision for credit losses:
Provision for credit losses	$ 1,801	192	$ 3,747	180
Provision for credit losses, change in contribution	1,609		3,567
Non-interest income:
Non-interest income	31,737	24,992	57,527	49,114
Non-interest income, change in contribution	$ 6,745		$ 8,413
Non-interest income, percent change in contribution	27%		17%
Net revenue:
Net revenue	$ 116,730	83,710	$ 212,871	163,202
Net revenue, change in contribution	$ 33,020		$ 49,669
Net revenue, percent change in contribution	39%		30%
Operating Segments \| Wealth management
Net interest income:
Net interest income	$ 7,404	9,534	$ 16,359	17,910
Net interest income, change in contribution	$ (2,130)		$ (1,551)
Net interest income, percent change in contribution	(22.00%)		(9.00%)
Provision for credit losses:
Provision for credit losses	$ 0	0	$ 0	0
Provision for credit losses, change in contribution	$ 0		$ 0
Provision for credit losses, percent change in contribution	0%		0%
Non-interest income:
Non-interest income	$ 33,391	30,226	$ 63,688	60,804
Non-interest income, change in contribution	$ 3,165		$ 2,884
Non-interest income, percent change in contribution	10%		5%
Net revenue:
Net revenue	$ 40,795	39,760	$ 80,047	78,714
Net revenue, change in contribution	$ 1,035		$ 1,333
Net revenue, percent change in contribution	3%		2%
Intersegment Eliminations
Net interest income:
Net interest income	$ 8,908	7,826	$ 17,749	14,759
Net interest income, change in contribution	$ 1,082		$ 2,990
Net interest income, percent change in contribution	14%		20%
Provision for credit losses:
Provision for credit losses	$ 0	0		0
Provision for credit losses, change in contribution	$ 0		$ 0
Provision for credit losses, percent change in contribution	0%		0%
Non-interest income:
Non-interest income	$ (20,228)	(14,990)	$ (37,279)	(28,788)
Non-interest income, change in contribution	$ (5,238)		$ (8,491)
Non-interest income, percent change in contribution	35%		29%
Net revenue:
Net revenue	$ (11,320)	$ (7,164)	$ (19,530)	$ (14,029)
Net revenue, change in contribution	$ (4,156)		$ (5,501)
Net revenue, percent change in contribution	58%		39%

Derivative Financial Instrume_3

Derivative Financial Instruments (Schedule Of Fair Value Of Derivative Financial Instruments) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Derivative [Line Items]
Derivative Assets	$ 294,748	$ 296,848	$ 183,925
Derivative Liabilities	391,172	338,078	167,857
Interest rate derivatives
Derivative [Line Items]
Derivative Assets	279,614	286,438	175,756
Derivative Liabilities	382,413	329,307	165,107
Designated as hedging instrument
Derivative [Line Items]
Derivative Assets	18,409	16,768	10,547
Derivative Liabilities	121,347	58,198	128
Designated as hedging instrument \| Interest rate derivatives \| Interest rate derivatives designated as Cash Flow Hedges
Derivative [Line Items]
Derivative Assets	2,154	0	151
Derivative Liabilities	121,347	58,198	0
Designated as hedging instrument \| Interest rate derivatives \| Interest rate derivatives designated as Fair Value Hedges
Derivative [Line Items]
Derivative Assets	16,255	16,768	10,396
Derivative Liabilities	0	0	128
Not designated as hedging instrument
Derivative [Line Items]
Derivative Assets	276,339	280,080	173,378
Derivative Liabilities	269,825	279,880	167,729
Not designated as hedging instrument \| Interest rate derivatives
Derivative [Line Items]
Derivative Assets	261,205	269,670	165,209
Derivative Liabilities	261,066	271,109	164,979
Not designated as hedging instrument \| Interest rate lock commitments
Derivative [Line Items]
Derivative Assets	3,487	1,711	6,649
Derivative Liabilities	172	58	173
Not designated as hedging instrument \| Forward commitments to sell mortgage loans
Derivative [Line Items]
Derivative Assets	2,769	220	906
Derivative Liabilities	38	414	1,963
Not designated as hedging instrument \| Commodity forward contracts
Derivative [Line Items]
Derivative Assets	434	257	0
Derivative Liabilities	214	162	0
Not designated as hedging instrument \| Foreign exchange contracts
Derivative [Line Items]
Derivative Assets	8,444	8,222	614
Derivative Liabilities	$ 8,335	$ 8,137	$ 614

Derivative Financial Instrume_4

Derivative Financial Instruments (Schedule Of Cash Flow Hedging Instruments) (Detail) - Designated as hedging instrument - Cash Flow Hedging $ in Thousands	Jun. 30, 2023 USD ($)
Derivative [Line Items]
Notional Amount	$ 6,000,000
Fair Value Asset (Liability)	(119,193)
Buy 2.250% floor, sell 3.743% cap; matures September 2025
Derivative [Line Items]
Notional Amount	1,250,000
Fair Value Asset (Liability)	$ (29,186)
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)	$ (6,375)
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)	$ (45,700)
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)	$ (4,422)
Derivative fixed interest rate	3.748%
Fixed 3.759%; matures December 2025
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (4,356)
Derivative fixed interest rate	3.759%
Fixed 3.680%; matures February 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (4,762)
Derivative fixed interest rate	3.68%
Fixed 4.176%; matures March 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (1,563)
Derivative fixed interest rate	4.176%
Fixed 3.915%; matures March 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (3,211)
Derivative fixed interest rate	3.915%
Fixed 4.450%; matures July 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ 1,046
Derivative fixed interest rate	4.45%
Fixed 3.515%, matures December 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (5,208)
Derivative fixed interest rate	3.515%
Fixed 3.512%; matures December 2026
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (5,233)
Derivative fixed interest rate	3.512%
Fixed 3.453%; matures February 2027
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (5,654)
Derivative fixed interest rate	3.453%
Fixed 4.150%; matures July 2027
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ 1,108
Derivative fixed interest rate	4.15%
Fixed 3.748%; matures March 2028
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (1,652)
Derivative fixed interest rate	3.748%
Fixed 3.526%; matures March 2028
Derivative [Line Items]
Notional Amount	$ 250,000
Fair Value Asset (Liability)	$ (4,025)
Derivative fixed interest rate	3.526%

Derivative Financial Instrume_5

Derivative Financial Instruments (Narrative) (Detail)	3 Months Ended		6 Months Ended
Derivative Financial Instruments (Narrative) (Detail)	Dec. 31, 2022 USD ($) derivativeInstrument	Mar. 31, 2022 USD ($)	Jun. 30, 2023 USD ($) derivativeInstrument	Jun. 30, 2022 USD ($) 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			$ (68,900,000)
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			17,600,000
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			(86,500,000)
Mortgage banking derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 190,000,000		$ 190,000,000
Number of derivative instruments held \| derivativeInstrument	3		3
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 terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 1,000,000,000
Not designated as hedging instrument \| Interest rate contract, qualified borrowers
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	9,600,000,000		11,200,000,000
Not designated as hedging instrument \| Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	121,600,000		225,100,000
Not designated as hedging instrument \| Forward commitments to sell mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	321,000,000		693,500,000
Not designated as hedging instrument \| Commodity forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	3,600,000		6,600,000
Not designated as hedging instrument \| Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 226,200,000		$ 205,300,000
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			$ 6,000,000,000
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			$ 204,100,000
Number of interest rate derivatives \| derivativeInstrument			13

Derivative Financial Instrume_6

Derivative Financial Instruments (Rollforward Of Amounts In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedges) (Detail) - Interest rate contract - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Unrealized gain at beginning of period	$ 44,692	$ 76,389	$ 10,026	$ 36,908
Amount reclassified from accumulated other comprehensive income or loss to interest income or expense on deposits, loans, and other borrowings	14,092	1,012	17,664	6,365
Amount of gain recognized in other comprehensive income or loss	(120,523)	1,363	(89,429)	35,491
Unrealized gain at end of period	$ (61,739)	$ 78,764	$ (61,739)	$ 78,764

Derivative Financial Instrume_7

Derivative Financial Instruments (Derivatives in Fair Value Hedging Relationships) (Detail) - Designated as Hedging Instrument - Interest rate swaps $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)
Interest and fees on loans
Derivative [Line Items]
Location of (Loss)/Gain Recognized in Income on Derivative	$ (7)	$ 2
Interest income - investment securities
Derivative [Line Items]
Location of (Loss)/Gain Recognized in Income on Derivative	0	0
Loans, net of unearned income
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	187,102	187,102
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	(16,202)	(16,202)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued	(94)	(94)
Available-for-sale debt securities
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	828	828
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	(25)	(25)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued	$ 0	$ 0

Derivative Financial Instrume_8

Derivative Financial Instruments (Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest rate swaps and caps \| Trading gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ 12	$ 161	$ 812	$ 4,185
Mortgage banking derivatives \| Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	4,791	(7,550)	8,431	(14,919)
Commodity contracts \| Trading gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	49	0	226	0
Foreign exchange contracts \| Trading gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	0	0	0	0
Covered call options \| Fees from covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	2,578	1,069	12,969	4,811
Derivative contract held as economic hedge on MSRs \| Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (726)	$ 0	$ 220	$ 0

Derivative Financial Instrume_9

Derivative Financial Instruments (Summary of Interest Rate Derivatives) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Derivative Assets
Derivative Assets	$ 294,748	$ 296,848	$ 183,925
Derivative Liabilities
Gross Amounts Recognized	391,172	338,078	167,857
Interest rate contract
Derivative Assets
Derivative Assets	279,614	286,438	175,756
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	279,614	286,438	175,756
Offsetting Derivative Positions	(125,159)	(64,100)	(6,009)
Collateral Posted	(145,735)	(194,666)	(163,412)
Net Credit Exposure	8,720	27,672	6,335
Derivative Liabilities
Gross Amounts Recognized	382,413	329,307	165,107
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	382,413	329,307	165,107
Offsetting Derivative Positions	(125,159)	(64,100)	(6,009)
Collateral Posted	0	0	(91)
Net Credit Exposure	$ 257,254	$ 265,207	$ 159,007

Fair Values of Assets and Lia_3

Fair Values of Assets and Liabilities (Narrative) (Detail)	6 Months Ended
Fair Values of Assets and Liabilities (Narrative) (Detail)	Jun. 30, 2023 USD ($) $ / shares	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 3,492,481,000		$ 3,243,017,000	$ 2,970,121,000
Loans held-for-investment	200,447,000			122,757,000
MSRs	200,692,000	$ 224,470,000	230,225,000	212,664,000	$ 199,146,000	$ 147,571,000
Individually assessed loans - foreclosure probable and collateral-dependent	73,804,000			85,557,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,492,481,000		3,243,017,000	2,970,121,000
Remaining contractual principal balance outstanding, mortgage loans held-for-sale	345,700,000		308,900,000	510,700,000
Remaining contractual principal balance outstanding, mortgage loans held-for-investment	196,600,000		184,000,000	125,100,000
Non-performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale classified as nonaccrual	582,000,000		5,800,000	6,000,000
Mortgage loans held-for-sale classified greater than 90 days past due and still accruing	$ 29,600,000		44,000,000	55,600,000
Weighted Average \| Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life of loans	6 years 2 months 12 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	$ 338,728,000		299,935,000	513,232,000
Loans held-for-investment	193,953,000		179,932,000	122,757,000
MSRs	200,692,000		230,225,000	212,664,000
Derivative assets	294,748,000		296,848,000	183,925,000
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	73,804,000
Other real estate owned	11,586,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	73,800,000
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	29,406,000		48,655,000	88,963,000
Loans held-for-investment	61,123,000		84,165,000	84,798,000
MSRs	200,692,000		230,225,000	212,664,000
Derivative assets	$ 3,487,000		1,711,000	6,649,000
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	0.1050
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	0.0650
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	0.0657
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	0.1050
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	0.02
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	0.02
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: \| 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	0.0701
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	0.0701
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	0.0701
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	1
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	1
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	0.0042
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	0.0089
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	0.13
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	0.14
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	405
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	0.8316
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	0.13
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	$ 73,804,000
Other real estate owned	11,586,000
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	167,411,000		168,655,000	166,705,000
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	167,411,000		168,655,000	166,705,000
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	$ 114,155,000		$ 117,537,000	$ 113,485,000

Fair Values of Assets and Lia_4

Fair Values of Assets and Liabilities (Summary of Balances of Assets and Liabilities Measured at Fair Value On A Recurring Basis) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 3,492,481		$ 3,243,017	$ 2,970,121
Equity securities with readily determinable fair value	116,275		110,365	93,295
Loans held-for-investment	200,447			122,757
MSRs	200,692	$ 224,470	230,225	212,664	$ 199,146	$ 147,571
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		14,948	0
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	74,275		74,222	48,087
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	167,411		168,655	166,705
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	3,027		1,127	1,010
Equity securities with readily determinable fair value	116,275		110,365	93,295
Mortgage loans held-for-sale	338,728		299,935	513,232
Loans held-for-investment	193,953		179,932	122,757
MSRs	200,692		230,225	212,664
Nonqualified deferred compensation assets	14,796		13,899	13,936
Derivative assets	294,748		296,848	183,925
Total	4,654,700		4,375,348	4,110,940
Derivative liabilities	391,172		338,078	167,857
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	108,209		102,299	85,229
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	108,209		117,247	85,229
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	3,027		1,127	1,010
Equity securities with readily determinable fair value	8,066		8,066	8,066
Mortgage loans held-for-sale	309,322		251,280	424,269
Loans held-for-investment	132,830		95,767	37,959
MSRs	0		0	0
Nonqualified deferred compensation assets	14,796		13,899	13,936
Derivative assets	291,261		295,137	177,276
Total	4,137,628		3,775,808	3,519,152
Derivative liabilities	391,172		338,078	167,857
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	29,406		48,655	88,963
Loans held-for-investment	61,123		84,165	84,798
MSRs	200,692		230,225	212,664
Nonqualified deferred compensation assets	0		0	0
Derivative assets	3,487		1,711	6,649
Total	408,863		482,293	506,559
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	0		14,948	0
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	0		14,948	0
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	74,275		74,222	48,087
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	74,275		74,222	48,087
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	29,406
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	167,411		168,655	166,705
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	53,256		51,118	53,220
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	114,155		117,537	113,485
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	72,060		85,705	89,813
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	72,060		85,705	89,813
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	3,178,735		2,899,487	2,665,516
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	3,178,735		2,899,487	2,665,516
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

Fair Values of Assets and Lia_5

Fair Values of Assets and Liabilities (Summary of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Mortgage loans held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 44,250	$ 0	$ 48,655	$ 0
Net income	402	(2,900)	868	(2,900)
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(23,973)	0	(42,592)	0
Net transfers into Level 3	8,727	91,863	22,475	91,863
Ending balance	29,406	88,963	29,406	88,963
Loans held-for- investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	69,493	44,464	84,165	15,891
Net income	(619)	(1,775)	(255)	(2,547)
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(16,593)	(7,231)	(36,915)	(8,898)
Net transfers into Level 3	8,842	49,340	14,128	80,352
Ending balance	61,123	84,798	61,123	84,798
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	224,470	199,146	230,225	147,571
Net income	6,392	13,518	637	65,093
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	(30,170)	0	(30,170)	0
Settlements	0	0	0	0
Net transfers into Level 3	0	0	0	0
Ending balance	200,692	212,664	200,692	212,664
Derivative assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5,356	3,447	1,711	10,560
Net income	(1,869)	3,202	1,776	(3,911)
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Net transfers into Level 3	0	0	0	0
Ending balance	3,487	6,649	3,487	6,649
Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	112,257	100,401	117,537	105,687
Net income	0	0	0	0
Other comprehensive income or loss	(3,161)	(685)	(4,823)	(6,134)
Purchases	6,978	15,497	11,396	16,743
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(1,919)	(1,728)	(9,955)	(2,811)
Net transfers into Level 3	0	0	0	0
Ending balance	$ 114,155	$ 113,485	$ 114,155	$ 113,485

Fair Values of Assets and Lia_6

Fair Values of Assets and Liabilities (Summary of Assets Measured at Fair Value on a Nonrecurring Basis) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 73,804	$ 73,804	$ 85,557
Fair value losses - individually assessed loans - foreclosure probable and collateral-dependent	11,635	14,136
Fair value losses - other real estate owned	0	104
Fair value losses	11,635	14,240
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	73,800	73,800
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	73,804	73,804
Other real estate owned	11,586	11,586
Total	85,390	85,390
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	0
Other real estate owned	0	0
Total	0	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	0
Other real estate owned	0	0
Total	0	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	73,804	73,804
Other real estate owned	11,586	11,586
Total	$ 85,390	$ 85,390

Fair Values of Assets and Lia_7

Fair Values of Assets and Liabilities (Schedule of Valuation Techniques and Significant Unobservable Inputs Used to Measure Both Recurring and Non-Recurring) (Detail)	Jun. 30, 2023 USD ($) $ / shares year	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	$ 3,492,481,000		$ 3,243,017,000	$ 2,970,121,000
Loans held-for-investment	200,447,000			122,757,000
MSRs	200,692,000	$ 224,470,000	230,225,000	212,664,000	$ 199,146,000	$ 147,571,000
Individually assessed loans - foreclosure probable and collateral-dependent	73,804,000			85,557,000
Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	167,411,000		168,655,000	166,705,000
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	73,800,000
Measured at fair value on a recurring basis:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale	338,728,000		299,935,000	513,232,000
Loans held-for-investment	193,953,000		179,932,000	122,757,000
MSRs	200,692,000		230,225,000	212,664,000
Derivative assets	294,748,000		296,848,000	183,925,000
Measured at fair value on a recurring basis: \| Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities	167,411,000		168,655,000	166,705,000
Measured at fair value on a recurring basis: \| Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale	29,406,000		48,655,000	88,963,000
Loans held-for-investment	61,123,000		84,165,000	84,798,000
MSRs	200,692,000		230,225,000	212,664,000
Derivative assets	3,487,000		1,711,000	6,649,000
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	$ 114,155,000		$ 117,537,000	$ 113,485,000
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	0.0650
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	0.0650
MSRs, measurement input	0.02
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	0.0725
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	0.0650
Loans held-for-investment, measurement input	0.0657
MSRs, measurement input	0.1050
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	0.13
Loans held-for-investment, measurement input	0.14
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	0.0042
Loans held-for-investment, measurement input	0.0089
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	0.0701
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	1
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	0.0701
MSRs, measurement input	0.0701
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	2.7
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	10.5
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	6.2
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	405
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	0.13
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	0.8316
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	$ 73,804,000
Other real estate owned	11,586,000
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	73,804,000
Other real estate owned	$ 11,586,000
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

Fair Values of Assets and Lia_8

Fair Values of Assets and Liabilities (Summary Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Financial Assets:
Interest-bearing deposits with banks	$ 2,163,708	$ 1,988,719	$ 3,266,541
Available-for-sale securities	3,492,481	3,243,017	2,970,121
Held-to-maturity securities	2,887,891	2,949,821	2,900,269
Equity securities with readily determinable fair value	116,275	110,365	93,295
FHLB and FRB stock, at cost	195,117	224,759	136,138
Brokerage customer receivables	15,722	16,387	21,527
Mortgage loans held-for-sale, at fair value	338,728	299,935	513,232
Accrued interest receivable and other	1,455,748	1,391,342	1,112,697
Financial Liabilities
FHLB advances	2,026,071	2,316,071	1,166,071
Other borrowings	665,219	596,614	482,787
Subordinated notes	437,628	437,392	437,162
Junior subordinated debentures	253,566	253,566	253,566
Carrying Value
Financial Assets:
Cash and cash equivalents	513,917	490,966	498,947
Securities sold under agreements to repurchase with original maturities exceeding three months	0	0	475,000
Interest-bearing deposits with banks	2,163,708	1,988,719	3,266,541
Available-for-sale securities	3,492,481	3,243,017	2,970,121
Held-to-maturity securities	3,564,473	3,640,567	3,413,469
Trading account securities	3,027	1,127	1,010
Equity securities with readily determinable fair value	116,275	110,365	93,295
FHLB and FRB stock, at cost	195,117	224,759	136,138
Brokerage customer receivables	15,722	16,387	21,527
Mortgage loans held-for-sale, at fair value	338,728	299,935	513,232
Nonqualified deferred compensation assets	14,796	13,899	13,936
Derivative assets	294,748	296,848	183,925
Accrued interest receivable and other	434,553	379,719	283,626
Total	52,170,953	49,902,793	48,923,870
Financial Liabilities
Non-maturity deposits	37,682,437	38,167,409	38,917,105
Deposits with stated maturities	6,356,270	4,735,135	3,676,221
FHLB advances	2,026,071	2,316,071	1,166,071
Other borrowings	665,219	596,614	482,787
Subordinated notes	437,628	437,392	437,162
Junior subordinated debentures	253,566	253,566	253,566
Derivative liabilities	391,172	338,078	167,857
Accrued interest payable	45,359	22,176	8,233
Total financial liabilities	47,857,722	46,866,441	45,109,002
Carrying Value \| Loans held-for-investment, at fair value
Financial Assets:
Loans held-for-investment	193,953	179,932	122,757
Carrying Value \| Loans held-for-investment, at amortized cost
Financial Assets:
Loans held-for-investment	40,829,455	39,016,553	36,930,346
Fair Value
Financial Assets:
Cash and cash equivalents	513,917	490,966	498,947
Securities sold under agreements to repurchase with original maturities exceeding three months	0	0	475,000
Interest-bearing deposits with banks	2,163,708	1,988,719	3,266,541
Available-for-sale securities	3,492,481	3,243,017	2,970,121
Held-to-maturity securities	2,887,891	2,949,821	2,900,269
Trading account securities	3,027	1,127	1,010
Equity securities with readily determinable fair value	116,275	110,365	93,295
FHLB and FRB stock, at cost	195,117	224,759	136,138
Brokerage customer receivables	15,722	16,387	21,527
Mortgage loans held-for-sale, at fair value	338,728	299,935	513,232
Nonqualified deferred compensation assets	14,796	13,899	13,936
Derivative assets	294,748	296,848	183,925
Accrued interest receivable and other	434,553	379,719	283,626
Total	50,807,892	48,214,172	47,646,162
Financial Liabilities
Non-maturity deposits	37,682,437	38,167,409	38,917,105
Deposits with stated maturities	6,300,161	4,085,058	3,683,452
FHLB advances	2,072,317	2,219,983	1,116,429
Other borrowings	662,156	569,342	483,592
Subordinated notes	405,762	409,395	434,809
Junior subordinated debentures	253,562	253,405	281,085
Derivative liabilities	391,172	338,078	167,857
Accrued interest payable	45,359	22,176	8,233
Total financial liabilities	47,812,926	46,064,846	45,092,562
Fair Value \| Loans held-for-investment, at fair value
Financial Assets:
Loans held-for-investment	193,953	179,932	122,757
Fair Value \| Loans held-for-investment, at amortized cost
Financial Assets:
Loans held-for-investment	$ 40,142,976	$ 38,018,678	$ 36,165,838

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Narrative) (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Shares available for future grants (in shares)	1.2		1.2
Stock-based compensation expense	$ 8.1	$ 7	$ 16.4	$ 14.9
Aggregate intrinsic value of options exercised			2.5	4.7
Cash received from option exercises			$ 2.2	$ 3.5

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Summary of Stock Option Activity) (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Common Shares
Outstanding at beginning of the period (in shares)	68,093	193,447
Granted (in shares)	0	0
Exercised (in shares)	(54,218)	(83,507)
Forfeited or canceled (in shares)	0	(1,430)
Outstanding at end of the period (in shares)	13,875	108,510
Exercisable (in shares)	13,875	108,510
Weighted Average Strike Price
Outstanding at beginning of period (usd per share)	$ 41.14	$ 41.62
Granted (usd per share)	0	0
Exercised (usd per share)	40.87	42.39
Forfeited or canceled (usd per share)	0	40.87
Outstanding at end of period (usd per share)	42.18	41.04
Exercisable (usd per share)	$ 42.18	$ 41.04
Stock Options Additional Disclosures
Remaining contractual term, outstanding	4 years 6 months	1 year 2 months 12 days
Remaining contractual term, exercisable	4 years 6 months	1 year 2 months 12 days
Intrinsic value, outstanding	$ 422	$ 4,244
Intrinsic value, exercisable	$ 422	$ 4,244

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans (Summary of Plans' Restricted and Performance Share Award Activity) (Detail) - $ / shares	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Restricted shares
Common Shares
Outstanding, beginning of the period (in shares)	610,155	476,813
Granted (in shares)	260,173	204,043
Vested and issued (in shares)	(103,161)	(56,380)
Expired, canceled or forfeited (in shares)	(7,638)	(9,722)
Outstanding, end of the period (in shares)	759,529	614,754
Vested, but deferred (in shares)	98,247	96,400
Weighted Average Grant-Date Fair Value
Outstanding, beginning of period (usd per share)	$ 73.21	$ 61.33
Granted (usd per share)	88.29	96.95
Vested and issued (usd per share)	64.08	64.44
Canceled or forfeited (usd per share)	82.82	72.87
Outstanding, end of period (usd per share)	79.52	72.68
Vested, but deferred (usd per share)	$ 53.35	$ 52.83
Performance-based stock
Common Shares
Outstanding, beginning of the period (in shares)	545,379	557,255
Granted (in shares)	186,313	160,326
Added by performance factor at vesting (in shares)	23,161	0
Vested and issued (in shares)	(178,203)	0
Expired, canceled or forfeited (in shares)	(7,909)	(163,803)
Outstanding, end of the period (in shares)	568,741	553,778
Vested, but deferred (in shares)	36,438	35,424
Weighted Average Grant-Date Fair Value
Outstanding, beginning of period (usd per share)	$ 70.30	$ 62.94
Granted (usd per share)	92.45	97.16
Added by performance factor at vesting (usd per share)	63.64	0
Vested and issued (usd per share)	63.64	0
Canceled or forfeited (usd per share)	82.73	71.44
Outstanding, end of period (usd per share)	79.20	70.34
Vested, but deferred (usd per share)	$ 44.99	$ 44.04

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Components Of Other Comprehensive Income or Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 5,015,506	$ 4,492,256	$ 4,796,838	$ 4,498,688
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(116,970)	(127,748)	(58,949)	(251,551)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	10,336	742	12,547	4,485
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	(20)	(32)	(52)	(63)
Net other comprehensive (loss) income during the period, net of tax	(106,654)	(127,038)	(46,454)	(247,129)
Ending balance	5,041,912	4,727,623	5,041,912	4,727,623
Accumulated Unrealized (Losses) Gains on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(351,995)	(142,604)	(386,057)	8,724
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(33,909)	(122,154)	594	(273,268)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(1)	0	(410)	(183)
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	(20)	(32)	(52)	(63)
Net other comprehensive (loss) income during the period, net of tax	(33,930)	(122,186)	132	(273,514)
Ending balance	(385,925)	(264,790)	(385,925)	(264,790)
Accumulated Unrealized Gains (Losses) on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	32,809	56,060	7,381	27,111
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(88,405)	999	(65,597)	26,022
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	10,337	742	12,957	4,668
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	0	0
Net other comprehensive (loss) income during the period, net of tax	(78,068)	1,741	(52,640)	30,690
Ending balance	(45,259)	57,801	(45,259)	57,801
Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(48,250)	(29,455)	(48,960)	(31,743)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	5,344	(6,593)	6,054	(4,305)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	0	0	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	0	0
Net other comprehensive (loss) income during the period, net of tax	5,344	(6,593)	6,054	(4,305)
Ending balance	(42,906)	(36,048)	(42,906)	(36,048)
Accumulated other comprehensive income (loss)
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(367,436)	(115,999)	(427,636)	4,092
Ending balance	$ (474,090)	$ (243,037)	$ (474,090)	$ (243,037)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Other Comprehensive Income Reclassified from AOCI) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains (losses) on investment securities, net	$ 0	$ 0	$ 560	$ 251
Income tax expense	56,680	37,148	120,032	83,437
Interest on deposits	213,495	18,985	358,297	33,839
Net income	154,750	94,513	334,948	221,904
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 (losses) on investment securities, net	2	0	562	250
Income before taxes	2	0	562	250
Income tax expense	(1)	0	(152)	(67)
Net income	1	0	410	183
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	(14,092)	(1,012)	(17,664)	(6,365)
Income tax expense	3,755	270	4,707	1,697
Interest on Loans	18,661	0	27,733	0
Interest on deposits	(4,657)	657	(10,245)	5,476
Interest on other borrowings	88	355	176	889
Net income	$ (10,337)	$ (742)	$ (12,957)	$ (4,668)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Computation Of Basic And Diluted Earnings Per Common Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity [Abstract]
Net income	$ 154,750	$ 94,513	$ 334,948	$ 221,904
Less: Preferred stock dividends	6,991	6,991	13,982	13,982
Net income applicable to common shares	$ 147,759	$ 87,522	$ 320,966	$ 207,922
Weighted average common shares outstanding (in shares)	61,192	58,063	61,072	57,632
Effect of dilutive potential common shares
Common stock equivalents (in shares)	902	775	933	823
Weighted average common shares and effect of dilutive potential common shares (in shares)	62,094	58,838	62,005	58,455
Net income per common share:
Basic (usd per share)	$ 2.41	$ 1.51	$ 5.26	$ 3.61
Diluted (usd per share)	$ 2.38	$ 1.49	$ 5.18	$ 3.56

Accumulated Other Comprehensi_6

Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Narrative) (Detail) - $ / shares	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 30, 2023	Jan. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2023
Class of Stock [Line Items]
Cash dividends declared per common share (usd per share)	$ 0.40	$ 0.40	$ 0.40	$ 0.34	$ 0.80	$ 0.68
Forecast
Class of Stock [Line Items]
Cash dividends declared per common share (usd per share)							$ 1.60