Webster Financial (WBS) 10-Q 4 Nov 22 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	001-31486
Entity Registrant Name	WEBSTER FINANCIAL CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-1187536
Entity Address, Address Line One	200 Elm Street
Entity Address, City or Town	Stamford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06902
City Area Code	203
Local Phone Number	578-2202
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		174,009,423
Entity Central Index Key	0000801337
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Common Class A
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	WBS
Security Exchange Name	NYSE
Series F Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing 1/1000th interest in a share
Trading Symbol	WBS-PrF
Security Exchange Name	NYSE
Series G Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing 1/40th interest in a share
Trading Symbol	WBS-PrG
Security Exchange Name	NYSE

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets:
Cash and due from banks	$ 286,487	$ 137,385
Interest-bearing deposits	326,638	324,185
Investment securities available-for-sale, at fair value	8,085,044	4,234,854
Investment securities held-to-maturity, net of allowance for credit losses of $209 and $214	6,505,838	6,198,125
Federal Home Loan Bank and Federal Reserve Bank stock	373,044	71,836
Loans held for sale (valued under fair value option)	898	4,694
Loans and leases	47,823,875	22,271,729
Allowance for credit losses on loans and leases	(574,325)	(301,187)
Loans and leases, net	47,249,550	21,970,542
Deferred tax assets, net	369,737	109,405
Premises and equipment, net	434,721	204,557
Goodwill	2,513,771	538,373
Other intangible assets, net	207,269	17,869
Cash surrender value of life insurance policies	1,230,641	572,305
Accrued interest receivable and other assets	1,468,928	531,469
Total assets	69,052,566	34,915,599
Liabilities and shareholders' equity:
Non-interest-bearing	13,849,812	7,060,488
Interest-bearing	40,159,075	22,786,541
Total deposits	54,008,887	29,847,029
Securities sold under agreements to repurchase and other borrowings	1,265,414	674,896
Federal Home Loan Bank advances	3,510,717	10,997
Long-term debt	1,074,844	562,931
Accrued expenses and other liabilities	1,366,294	381,421
Total liabilities	61,226,156	31,477,274
Shareholders’ equity:
Common stock	1,828	937
Paid-in capital	6,161,297	1,108,594
Retained earnings	2,543,015	2,333,288
Treasury stock, at cost (8,661,764 and 3,102,690 shares)	(426,808)	(126,951)
Accumulated other comprehensive (loss), net of tax	(736,901)	(22,580)
Total shareholders' equity	7,826,410	3,438,325
Total liabilities and shareholders' equity	$ 69,052,566	$ 34,915,599
Common stock, shares issued (in shares)	182,778,045	93,686,311
Series F Preferred Stock
Shareholders’ equity:
Preferred stock	$ 145,037	$ 145,037
Series G Preferred Stock
Shareholders’ equity:
Preferred stock	$ 138,942	$ 0

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Allowance for credit losses	$ 209	$ 214
Loans held for sale, valued under fair value option	$ 898	$ 4,694
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	3,000,000	3,000,000
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	182,778,045	93,686,311
Treasury stock (in shares)	8,661,764	3,102,690
Series F Preferred Stock
Preferred stock, shares issued (in shares)	6,000	6,000
Preferred stock, shares outstanding (in shares)	6,000	6,000
Series G Preferred Stock
Preferred stock, shares issued (in shares)	135,000
Preferred stock, shares outstanding (in shares)	135,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest Income:
Interest and fees on loans and leases	$ 525,960	$ 196,273	$ 1,303,774	$ 572,728
Taxable interest and dividends on investments	77,570	38,208	200,832	118,125
Non-taxable interest on investment securities	13,999	5,154	36,465	15,770
Loans held for sale	40	57	73	201
Total interest income	617,569	239,692	1,541,144	706,824
Interest Expense:
Deposits	37,492	4,571	57,350	16,104
Securities sold under agreements to repurchase and other borrowings	6,242	721	9,876	2,216
Federal Home Loan Bank advances	13,814	492	17,034	1,539
Long-term debt	9,018	4,217	24,973	12,658
Total interest expense	66,566	10,001	109,233	32,517
Net interest income	551,003	229,691	1,431,911	674,307
Provision (benefit) for credit losses	36,531	7,750	237,619	(39,500)
Net interest income after provision (benefit) for credit losses	514,472	221,941	1,194,292	713,807
Non-interest Income:
Deposit service fees	50,807	40,258	150,019	122,166
Loan and lease related fees	26,769	10,881	77,355	27,056
Wealth and investment services	11,419	9,985	33,260	29,475
Mortgage banking activities	86	1,525	616	5,486
Increase in cash surrender value of life insurance policies	7,718	3,666	22,694	10,802
(Loss) on sale of investment securities, net	(2,234)	0	(2,234)	0
Other income	19,071	17,460	56,894	38,249
Total non-interest income	113,636	83,775	338,604	233,234
Non-interest Expense:
Compensation and benefits	173,983	105,352	545,641	310,706
Occupancy	23,517	12,430	93,725	42,090
Technology and equipment	45,283	28,441	142,182	84,081
Intangible assets amortization	8,511	1,124	23,700	3,395
Marketing	3,918	3,721	10,868	9,452
Professional and outside services	21,618	7,074	91,041	37,875
Deposit insurance	8,026	3,855	19,996	11,560
Other expense	45,215	18,240	120,930	56,088
Total non-interest expense	330,071	180,237	1,048,083	555,247
Income before income taxes	298,037	125,479	484,813	391,794
Income tax expense	64,069	29,766	85,281	93,968
Net income	233,968	95,713	399,532	297,826
Less: Preferred stock dividends	4,162	1,968	11,756	5,906
Net income available to common shareholders	229,806	93,745	387,776	291,920
Earnings applicable to common shareholders	$ 229,806	$ 93,745	$ 387,776	$ 291,920
Earnings per common share:
Basic (in dollars per share)	$ 1.31	$ 1.03	$ 2.32	$ 3.23
Diluted (in dollars per share)	$ 1.31	$ 1.03	$ 2.32	$ 3.22

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 233,968	$ 95,713	$ 399,532	$ 297,826
Other comprehensive (loss) income, net of tax:
Investment securities available-for-sale	(242,231)	(3,394)	(692,383)	(35,220)
Derivative instruments	(13,699)	(1,731)	(21,851)	(7,755)
Defined benefit pension and other postretirement benefit plans	361	743	(87)	2,227
Other comprehensive (loss), net of tax	(255,569)	(4,382)	(714,321)	(40,748)
Comprehensive (loss) income	$ (21,601)	$ 91,331	$ (314,789)	$ 257,078

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Series F Preferred Stock	Series G Preferred Stock	Preferred Stock	Common Stock	Paid-In Capital	Retained Earnings	Retained Earnings Series F Preferred Stock	Retained Earnings Series G Preferred Stock	Treasury Stock, at cost	Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning Balance at Dec. 31, 2020	$ 3,234,625			$ 145,037	$ 937	$ 1,109,532	$ 2,077,522			$ (140,659)	$ 42,256
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	297,826						297,826
Other comprehensive (loss), net of tax	(40,748)										(40,748)
Common stock dividends and equivalents	(108,882)						(108,882)
Preferred stock dividends		$ (5,906)						$ (5,906)
Stock-based compensation	10,076					508				9,568
Exercise of stock options	3,469					(5,155)				8,624
Common shares acquired from stock compensation plan activity	(4,271)									(4,271)
Ending Balance at Sep. 30, 2021	3,386,189			145,037	937	1,104,885	2,260,560			(126,738)	1,508
Beginning Balance at Jun. 30, 2021	3,329,705			145,037	937	1,101,126	2,203,160			(126,445)	5,890
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	95,713						95,713
Other comprehensive (loss), net of tax	(4,382)										(4,382)
Common stock dividends and equivalents	(36,345)						(36,345)
Preferred stock dividends		(1,968)						(1,968)
Stock-based compensation	3,643					3,819	0			(176)
Exercise of stock options	83					(60)				143
Common shares acquired from stock compensation plan activity	(260)									(260)
Ending Balance at Sep. 30, 2021	3,386,189			145,037	937	1,104,885	2,260,560			(126,738)	1,508
Beginning Balance at Dec. 31, 2021	3,438,325			145,037	937	1,108,594	2,333,288			(126,951)	(22,580)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	399,532						399,532
Other comprehensive (loss), net of tax	(714,321)										(714,321)
Common stock dividends and equivalents	(178,049)						(178,049)
Preferred stock dividends		(5,906)	$ (5,850)					(5,906)	$ (5,850)
Common stock contribution to charitable foundation	10,500					(1,701)				12,201
Issued in business combination	5,180,124			138,942	891	5,040,291
Stock-based compensation	43,231					14,726				28,505
Exercise of stock options	635					(613)				1,248
Common shares acquired from stock compensation plan activity	(22,545)									(22,545)
Common stock repurchase program	(319,266)									(319,266)
Ending Balance at Sep. 30, 2022	7,826,410			283,979	1,828	6,161,297	2,543,015			(426,808)	(736,901)
Beginning Balance at Jun. 30, 2022	7,997,788			283,979	1,828	6,148,853	2,383,638			(339,178)	(481,332)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	233,968						233,968
Other comprehensive (loss), net of tax	(255,569)										(255,569)
Common stock dividends and equivalents	(70,429)						(70,429)
Preferred stock dividends		$ (1,968)	$ (2,194)					$ (1,968)	$ (2,194)
Common stock contribution to charitable foundation	10,500					(1,701)				12,201
Stock-based compensation	12,762					14,307				(1,545)
Exercise of stock options	138					(162)				300
Common shares acquired from stock compensation plan activity	(1,450)									(1,450)
Common stock repurchase program	(97,136)									(97,136)
Ending Balance at Sep. 30, 2022	$ 7,826,410			$ 283,979	$ 1,828	$ 6,161,297	$ 2,543,015			$ (426,808)	$ (736,901)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Common stock dividends/equivalents (in dollars per share)	$ 0.40	$ 0.40	$ 1.20	$ 1.20
Series F Preferred Stock
Preferred stock dividends (in dollars per share)	328.125	$ 328.125	984.38	$ 984.38
Series G Preferred Stock
Preferred stock dividends (in dollars per share)	$ 16.25		$ 48.75

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities:
Net income	$ 399,532	$ 297,826
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (benefit) for credit losses	237,619	(39,500)
Deferred income tax (benefit)	(49,239)	(692)
Stock-based compensation expense	43,231	10,076
Common stock contribution to charitable foundation	10,500	0
Depreciation and amortization of property and equipment and intangible assets	62,403	27,071
(Accretion) and amortization of interest-earning assets and borrowings	(27,025)	102,648
Amortization of low-income housing tax credit investments	31,671	2,942
Amortization of mortgage servicing assets	2,151	4,295
Reduction of right-of-use lease assets	47,874	4,074
Net (gain) on sale, net of write-downs, of foreclosed properties and repossessed assets	(1,010)	(367)
Net loss (gain) on sale, net of write-downs, of property and equipment	6,507	(98)
Net loss on sale of investment securities	2,234	0
Originations of loans held for sale	(29,628)	(192,948)
Proceeds from sale of loans held for sale	33,886	199,991
Net (gain) on mortgage banking activities	(529)	(4,523)
Net (gain) on sale of loans not originated for sale	(3,135)	(1,278)
(Increase) in cash surrender value of life insurance policies	(22,694)	(10,802)
(Gain) from life insurance policies	(2,494)	(1,350)
Net decrease in derivative contract assets and liabilities	539,257	140,991
Net (increase) in accrued interest receivable and other assets	(51,300)	(84,781)
Net (decrease) increase in accrued expenses and other liabilities	(169,146)	10,594
Net cash provided by operating activities	1,060,665	464,169
Investing Activities:
Purchases of available-for-sale securities	(1,099,810)	(857,820)
Proceeds from principal payments, maturities, and calls of available-for-sale securities	612,783	729,877
Proceeds from sale of available-for-sale securities	65,330	0
Purchases of held-to-maturity securities	(963,655)	(1,203,951)
Proceeds from principal payments, maturities, and calls of held-to-maturity securities	627,887	1,007,842
Net (increase) decrease in Federal Home Loan Bank and Federal Reserve Bank stock	(150,706)	1,658
Alternative investments (capital calls), net of distributions	(7,811)	(8,897)
Net (increase) in loans	(5,526,220)	(66,526)
Proceeds from sale of loans not originated for sale	648,573	61,274
Proceeds from sale of foreclosed properties and repossessed assets	2,071	1,285
Proceeds from sale of property and equipment	300	2,912
Additions to property and equipment	(18,526)	(11,229)
Proceeds from life insurance policies	17,002	5,074
Net cash paid for acquisition of Bend	(54,407)	0
Net cash received in merger with Sterling	513,960	0
Net cash (used for) investing activities	(5,333,229)	(338,501)
Financing Activities:
Net increase in deposits	889,964	2,689,995
Proceeds from Federal Home Loan Bank advances	13,150,000	180,470
Repayments of Federal Home Loan Bank advances	(9,650,280)	(200,300)
Proceeds from extinguishment of borrowings	2,548	0
Net increase (decrease) in securities sold under agreements to repurchase and other borrowings	560,786	(339,484)
Dividends paid to common shareholders	(178,161)	(108,586)
Dividends paid to preferred shareholders	(9,562)	(5,906)
Exercise of stock options	635	3,469
Common stock repurchase program	(319,266)	0
Common shares acquired related to stock compensation plan activity	(22,545)	(4,271)
Net cash provided by financing activities	4,424,119	2,215,387
Net increase in cash and cash equivalents	151,555	2,341,055
Cash and cash equivalents at beginning of period	461,570	263,104
Cash and cash equivalents at end of period	613,125	2,604,159
Supplemental disclosure of cash flow information:
Interest paid	114,542	42,567
Income taxes paid	129,926	107,812
Non-cash investing and financing activities:
Transfer of loans and leases to foreclosed properties and repossessed assets	163	1,048
Transfer of loans and leases to loans-held-for-sale	621,922	74,923
Unsettled purchases of investment securities	0	284,713
Sterling
Non-cash investing and financing activities:
Tangible assets acquired	27,434,111	0
Goodwill and other intangible assets	2,149,532	0
Common stock issued	5,041,182	0
Liabilities assumed	24,403,343	0
Sterling | Preferred Stock
Non-cash investing and financing activities:
Preferred stock exchanged	138,942	0
Bend Financial, Inc.
Non-cash investing and financing activities:
Tangible assets acquired	16,597	0
Goodwill and other intangible assets	38,966	0
Liabilities assumed	$ 290	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Nature of Operations Webster Financial Corporation is a bank holding company and financial holding company under the BHC Act, incorporated under the laws of Delaware in 1986, and headquartered in Stamford, Connecticut. Webster Bank is the principal consolidated subsidiary of Webster Financial Corporation. Webster Bank, and its HSA Bank division, deliver a wide range of banking, investment, and financial services to individuals, families, and businesses. Webster Bank serves consumer and business customers with mortgage lending, financial planning, trust, and investment services through a distribution network consisting of banking centers, ATMs, a customer care center, and a full range of web and mobile-based banking services throughout the northeastern U.S. from New York to Massachusetts, with certain businesses operating in extended geographies. Webster Bank also offers equipment financing, warehouse lending, commercial real estate lending, asset-based lending, and treasury management solutions. HSA Bank is a leading provider of HSAs, and delivers health reimbursement arrangements and flexible spending and commuter benefit account administration services to employers and individuals in all 50 states. Basis of Presentation The unaudited condensed consolidated financial statements of Webster have been prepared in accordance with GAAP for interim financial information and Article 10 of Regulation S-X. Certain information and footnote disclosures required by GAAP for complete financial statements have been omitted or condensed. Therefore, the condensed consolidated financial statements should be read in conjunction with Webster's Annual Report on Form 10-K for the year ended December 31, 2021. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the future results that may be attained for the entire year or other interim periods. In the opinion of management, all necessary adjustments have been reflected to present fairly the financial position, results of operations, and cash flows for the reporting periods presented. Intercompany transactions and balances have been eliminated in consolidation. Assets under administration or assets under management that Webster holds or manages in a fiduciary or agency capacity for customers are not included in the consolidated financial statements. Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation. These reclassifications did not have a significant impact on the Company's consolidated financial statements. Use of Estimates The preparation of the consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Business Combinations Business combinations are accounted for under the acquisition method, in which the identifiable assets acquired and liabilities assumed are generally measured and recognized at fair value as of the acquisition date, with the excess of the purchase price over the fair value of the net assets acquired recognized as goodwill. Items such as acquired ROU lease assets and operating lease liabilities as lessee, employee benefit plans, and income-tax related balances are recognized in accordance with other applicable GAAP, which may result in measurements that differ from fair value. Business combinations are included in the consolidated financial statements from the respective dates of acquisition. Historical reporting periods reflect only the results of legacy Webster operations. Merger-related costs are expensed in the period incurred and presented within the applicable non-interest expense category. Additional information regarding Webster's mergers and acquisitions can be found within Purchased Credit-Deteriorated Loans and Leases Purchased credit-deteriorated (PCD) loans and leases are defined as those that have experienced a more-than-insignificant deterioration in credit quality since origination. Webster considers a variety of factors to evaluate and identify whether acquired loans are PCD, including but not limited to, nonaccrual status, delinquency, TDR classification, partial charge-offs, decreases in FICO scores, risk rating downgrades, and other factors. Upon acquisition, expected credit losses are added to the fair value of individual PCD loans and leases to determine the amortized cost basis. After initial recognition, any changes to the estimate of expected credit losses, favorable or unfavorable, are recorded as a provision for credit loss during the period of change. PCD accounting is also applied to loans and leases previously charged-off by the acquiree if Webster has contractual rights to the cash flows at the acquisition date. Webster recognizes an additional ACL for amounts previously charged-off by the acquiree with a corresponding increase to the amortized costs basis of the acquired asset. Balances deemed to be uncollectible are immediately charged-off in accordance with Webster’s charge-off policies, resulting in the establishment of the initial ACL for PCD loans and leases to be recorded net of these uncollectible balances. Relevant Accounting Standards Issued But Not Yet Adopted ASU No. 2022-02—Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures In March 2022, the Financial Accounting Standards Board (FASB) issued ASU No. 2022-02, which eliminates the accounting guidance for TDRs by creditors in Subtopic 310-40, Receivables—Troubled Debt Restructurings by Creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance in paragraphs 310-20-35-9 through 35-11 to determine whether a modification results in a new loan or a continuation of an existing loan. In addition, ASU No. 2022-02 requires that an entity disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost in the vintage disclosures required by paragraph 326-20-50-6. ASU No. 2022-02 is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years, with early adoption permitted. The amendments should be applied prospectively, however, an entity has the option to apply a modified retrospective transition method related to the recognition and measurement of TDRs, which would result in a cumulative-effect adjustment to retained earnings in the period of adoption. Webster is currently evaluating the impact of adoption on the Company's consolidated financial statements and disclosures. ASU No. 2022-03—Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to 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 that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security, and therefore, is not considered in measuring fair value. The amendments also clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction, and require the following disclosures for equity securities subject to contractual sale restrictions: (i) the fair value of equity securities subject to contractual sale restrictions reflected on the balance sheet; (ii) the nature and remaining duration of the restriction(s); and (iii) the circumstances that could cause a lapse in the restriction(s). ASU No. 2022-03 is effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years, with early adoption permitted. For all entities except investment companies, the amendments should be applied prospectively with any adjustments from the adoption of the amendments recognized in earnings and disclosed on the date of adoption. Webster is currently evaluating the impact of adoption on the Company's consolidated financial statements and disclosures.

Mergers and Acquisitions

Mergers and Acquisitions	9 Months Ended
	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Mergers and Acquisitions	Mergers and Acquisitions Merger with Sterling Bancorp On January 31, 2022, Webster completed its previously announced merger with Sterling pursuant to an agreement and plan of merger dated as of April 18, 2021 (the merger agreement), in which Sterling merged with and into Webster, with Webster continuing as the surviving corporation. Following the merger, on February 1, 2022, Sterling National Bank, a wholly-owned subsidiary of Sterling, merged with and into Webster Bank, with Webster Bank continuing as the surviving bank. Sterling was a full-service regional bank headquartered in Pearl River, New York, that primarily served the Greater New York metropolitan area. The merger expanded Webster's geographic footprint and combined two complementary organizations to create one of the largest commercial banks in the northeast U.S. Each share of Sterling common stock issued and outstanding immediately prior to the merger, other than certain shares held by Webster and Sterling, was converted into the right to receive a fixed 0.4630 share of Webster common stock. In connection with the completion of the merger and in accordance with the merger agreement, the number of authorized shares of Webster common stock was increased from 200.0 million shares to 400.0 million shares as of January 31, 2022. Cash was also paid to Sterling common shareholders in lieu of fractional shares, as applicable. In addition, each share of Sterling 6.50% Series A Non-Cumulative Perpetual Preferred Stock issued and outstanding immediately prior to the merger was converted into the right to receive one share of newly created Webster 6.50% Series G Non-Cumulative Perpetual Preferred Stock, having substantially the same terms. On January 31, 2022, Webster registered and issued 5,400,000 depositary shares, each representing 1/40th interest in a share of 6.50% Series G Non-Cumulative Preferred Perpetual Stock, par value $0.01 per share, with a liquidation preference equal to $1,000 per share (equivalent to $25 per depositary share) (the Series G Preferred Stock). The Series G Preferred Stock ranks on parity with Webster 5.25% Series F Non-Cumulative Preferred Perpetual Stock, par value $0.01 per share, with a liquidation preference of $25,000 per share (equivalent to $25 per depositary share), and senior to Webster common stock, with respect to the payment of dividends and distributions upon the liquidation, dissolution, or winding-up of Webster. Series G Preferred Stock dividends are payable quarterly on the fifteenth day of each January, April, July, and October, if and when declared by the Board of Directors. Webster may redeem the Series G Preferred Stock at its option, in whole or in part, subject to the approval of Federal Reserve Board, on any dividend payment date, or in whole but not in part, upon the occurrence of a regulatory capital treatment event, at a redemption price equal to the liquidation preference plus any declared and unpaid dividends, without accumulation of any undeclared dividends. As of the date of this Quarterly Report on Further, certain equity awards granted under Sterling's equity compensation plans were converted into a corresponding award with respect to Webster common stock, generally subject to the same terms and conditions, with the number of shares underlying such awards adjusted based on the 0.4630 fixed exchange ratio. The following table summarizes the determination of the purchase price consideration: (In thousands, except share and price per share data) Webster common stock issued 87,965,239 Price per share of Webster common stock on January 31, 2022 $ 56.81 Consideration for outstanding common stock 4,997,305 Consideration for preferred stock exchanged 138,942 Consideration for replacement equity awards (1) 43,877 Cash in lieu of fractional shares 176 Total purchase price consideration $ 5,180,300 (1) The fair value of the replacement equity awards issued by Webster and included in the consideration transferred pertain to services performed prior to the merger effective date. The fair value attributed to services performed after the merger effective date will be recognized over the required service vesting period for each award and recorded as compensation and benefits expense on the consolidated statements of income. Webster recognized an incremental $2.6 million and $16.4 million of stock compensation expense related to the replacement equity awards during the three and nine months ended September 30, 2022, respectively. The merger was accounted for as a business combination. Accordingly, the purchase price has been allocated to the assets acquired and liabilities assumed based on their fair values as of the merger effective date. The determination of fair value requires management to make estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and are subject to change. Fair value estimates of the assets acquired and liabilities assumed may be adjusted for a period up to one year (the measurement period) from the closing date of the merger if new information is obtained about facts and circumstances that existed as of the merger effective date that, if known, would have affected the measurement of the amounts recognized as of that date. Webster considers its valuations of loans and leases, tax receivables and payables, and certain other assets and other liabilities to be preliminary, as management continues to identify and assess information regarding the nature of these assets acquired and liabilities assumed, including extended information gathering, management review procedures, and any new information that may arise as a result of integration activities. Accordingly, the amounts recorded for current and DTAs and liabilities are also considered preliminary, as Webster continues to evaluate the nature and extent of permanent and temporary differences between the book and tax bases of the assets acquired and liabilities assumed. While the Company believes that the information available as of January 31, 2022, provides a reasonable basis for estimating fair value, it is possible that additional information may become available during the measurement period that would result in changes to the fair values presented. Any measurement period adjustments identified would be recognized in the corresponding reporting period. The following table summarizes the preliminary allocation of the purchase price to the fair value of the identifiable assets acquired and liabilities assumed from Sterling at January 31, 2022: (In thousands) Unpaid Principal Balance Fair Value Purchase price consideration $ 5,180,300 Assets: Cash and due from banks 510,929 Interest-bearing deposits 3,207 Investment securities available-for-sale 4,429,948 Federal Home Loan Bank and Federal Reserve Bank Stock 150,502 Loans held for sale 23,517 Loans and leases: Commercial non-mortgage $ 5,570,782 5,527,657 Asset-based 694,137 683,958 Commercial real estate 6,790,600 6,656,405 Multi-family 4,303,381 4,255,906 Equipment financing 1,350,579 1,314,311 Warehouse lending 647,767 643,754 Residential 1,313,785 1,281,637 Home equity 132,758 122,553 Other consumer 12,559 12,525 Total loans and leases $ 20,816,348 20,498,706 Deferred tax assets, net (52,130) Premises and equipment (1) 264,421 Other intangible assets 210,100 Bank-owned life insurance policies 645,510 Accrued interest receivable and other assets 959,501 Total assets acquired $ 27,644,211 Liabilities: Non-interest-bearing deposits $ 6,620,248 Interest-bearing deposits 16,643,755 Securities sold under agreements to repurchase and other borrowings 27,184 Long-term debt 516,881 Accrued expenses and other liabilities (1) 595,275 Total liabilities assumed $ 24,403,343 Net assets acquired 3,240,868 Goodwill $ 1,939,432 (1) Includes $100.0 million of ROU lease assets operating lease liabilities In connection with the merger, Webster recorded $1.9 billion of goodwill, which represents the excess of the purchase price over the fair value of the net assets acquired. Information regarding the allocation of goodwill to the Company's reportable segments, as well as the carrying amounts and amortization of the core deposit intangible and customer relationship intangible assets, can be found within Note 16: Segment Reporting and Note 6: Goodwill and Other Intangible Assets, respectively. The following is a description of the valuation methodologies used to estimate the fair values of the significant assets acquired and liabilities assumed: Cash and due from banks and interest-bearing deposits. The carrying amount of these assets is a reasonable estimate of fair value based on the short-term nature of these assets. Investment securities available-for-sale. The fair values for investment securities available-for-sale were based on quoted market prices, where available. If quoted market prices were not available, fair value estimates are based on observable inputs, including quoted market prices for similar instruments. Investment securities held-to-maturity were reclassified to investment securities available-for-sale based on the Company's intent at closing. Loans and leases. The fair values for loans and leases were estimated using a discounted cash flow methodology that considered factors including the type of loan or lease and the related collateral, classification status, fixed or variable interest rate, remaining term, amortization status, and current discount rates. In addition, the PD, LGD, and prepayment assumptions that were derived based on loan and lease characteristics, historical loss experience, comparable market data, and current and forecasted economic conditions were used to estimate expected credit losses. Loans and leases generally were valued individually. The discount rates used for loans and leases were based on current market rates for new originations or comparable loans and leases and include adjustments for liquidity. The discount rate did not include credit losses as that was included as a reduction to the estimated cash flows. Premises and equipment. The fair values for land and buildings were based on appraised values using the cost approach, which estimates the price a buyer would pay if they were to rebuild or reconstruct a similar property on a comparable piece of land. Intangible assets. A core deposit intangible asset represents the value of relationships with deposit clients. The fair value of the core deposit intangible asset was estimated using a net cost savings method, a form of discounted cash flow methodology that gave appropriate consideration to expected client attrition rates and other applicable adjustments to the projected deposit balance, the interest cost and net maintenance cost associated with the client deposit base, alternative cost of funds, and a discount rate used to discount the future economic benefits of the core deposit intangible asset to present value. The core deposit intangible asset is being amortized on an accelerated basis over 10 years based upon the period over which the estimated economic benefits are estimated to be received. Customer relationship intangible assets for payroll finance, factoring receivables finance, and wealth businesses were estimated using a discounted cash flow methodology that reflects the estimated value of the future net earnings for each relationship with adjustments for attrition. The customer relationship intangible assets are being amortized on an accelerated basis over their estimated useful life of 10 years. Bank-owned life insurance policies. The cash surrender value of these insurance policies is a reasonable estimate of fair value since it reflects the amount that would be realized by the contract owner upon discontinuance or surrender. Deposits. The fair values used for the demand and savings deposits by definition equal the amount payable on demand at the merger date. The fair values for time deposits were estimated using a discounted cash flow methodology that applies interest rates currently being offered to the contractual interest rates on such time deposits. Securities sold under agreements to repurchase and other borrowings. The carrying amount of these liabilities is a reasonable estimate of fair value based on the short-term nature of these liabilities. Long-term debt. The fair values of long-term debt instruments are estimated based on quoted market prices for the instrument, if available, or for similar instruments, if not available, or by using a discounted cash flow methodology based on current incremental borrowing rates for similar types of instruments. PCD Loans and Leases Purchased loans and leases that have experienced more-than-insignificant deterioration in credit quality since origination are considered PCD. For PCD loans and leases, the initial estimate of expected credit losses was established through an adjustment to the unpaid principal balance and non-credit discount at acquisition. Subsequent to the merger effective date, Webster recorded an ACL for non-PCD loans and leases of $175.1 million through an increase to the provision for credit losses. There was no carryover of Sterling's previously recorded ACL on loans and leases. The following table reconciles the unpaid principal balance to the fair value of PCD loans and leases by portfolio segment: (In thousands) Commercial Consumer Total Unpaid principal balance $ 3,394,963 $ 541,471 $ 3,936,434 ACL at acquisition (115,464) (20,852) (136,316) Non-credit (discount) (40,947) (2,784) (43,731) Fair value 3,238,552 517,835 3,756,387 Supplemental Pro Forma Financial Information (Unaudited) The following table summarizes supplemental pro forma financial information giving effect to the merger as if it had been completed on January 1, 2021: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Net interest income $ 538,125 $ 440,300 $ 1,436,867 $ 1,344,827 Non-interest income 113,636 120,961 349,405 347,928 Net income 239,569 181,980 636,174 368,051 The supplemental pro forma financial information does not necessarily reflect the results of operations that would have occurred had Webster merged with Sterling on January 1, 2021. The supplemental pro forma financial information includes the impact of (i) accreting and amortizing the discounts and premiums associated with the estimated fair value adjustments to acquired loans and leases, investment securities, deposits, and long-term debt, (ii) the amortization of recognized intangible assets, (iii) the elimination of Sterling's historical accretion and amortization of discounts and premiums and deferred origination fees and costs on loans and leases, (iv) the elimination of Sterling's historical accretion and amortization of discounts and premiums on investment securities, and (v) the related estimated income tax effects. Costs savings and other business synergies related to the merger are not included in the supplemental pro forma financial information. In addition, the supplemental pro forma financial information was adjusted for merger-related expenses, as follows: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Compensation and benefits (1) $ 5,770 $ 7,731 $ 71,472 $ 8,197 Occupancy (2) 4,389 — 35,744 — Technology and equipment (3) 1,478 33 21,375 33 Professional and outside services (4) 10,792 2,028 59,073 18,315 Marketing 64 — 199 — Other expense (5) 3,043 55 12,808 349 Total merger-related expenses $ 25,536 $ 9,847 $ 200,671 $ 26,894 (1) Comprised primarily of severance and employee retention costs, and executive synergy stock awards. (2) Comprised primarily of charges associated with Webster’s corporate real estate consolidation strategy, which was developed and launched in the second quarter of 2022. Under the consolidation plan, Webster has arranged to close 14 locations in order to reduce the Company's corporate real estate facility square footage by approximately 45% by the end of the year. During the three and nine months ended September 30, 2022, respectively, the Company recognized a combined $4.3 million and $12.0 million in related exit costs and accelerated depreciation on property and equipment. The amount for the nine months ended September 30, 2022 also includes $23.1 million in ROU asset impairment charges, which were calculated as the difference between the estimated fair value of the assets determined using a discounted cash flow technique, relative to their book value. (3) Comprised primarily of technology contract termination fees. (4) Comprised primarily of advisory, legal, accounting, and other professional fees. (5) Comprised primarily of disposals on property and equipment, transfer tax, and other miscellaneous expenses. Webster's operating results for the three and nine months ended September 30, 2022 includes the operating results of acquired assets and assumed liabilities of Sterling subsequent to the merger on January 31, 2022. Due to the various conversions of Sterling systems during the three and nine months ended September 30, 2022, as well as other streamlining and integration of operating activities into those of the Company, historical reporting for the former Sterling operations after January 31, 2022 is impracticable, and thus disclosures of Sterling's revenue and earnings since the merger effective date that are included in the condensed consolidated statements of income for the reporting period is impracticable. Bend Financial, Inc. Acquisition On February 18, 2022, Webster acquired 100% of the equity interests of Bend, a cloud-based platform solution provider for HSAs, in exchange for cash of $55.3 million. The acquisition accelerates Webster’s efforts underway to deliver enhanced user experiences at HSA Bank. The transaction was accounted for as a business combination, and resulted in the addition of $19.3 million in net assets, which primarily comprises $15.9 million of internal use software and a $3.0 million customer relationship intangible asset.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Available-for-Sale The following tables summarize the amortized cost and fair value of available-for-sale debt securities by major type: At September 30, 2022 (In thousands) Amortized Unrealized Unrealized Fair Value (1) U.S. Treasury notes $ 755,414 $ — $ (42,151) $ 713,263 Government agency debentures 311,982 — (42,954) 269,028 Municipal bonds and notes 1,842,985 — (145,840) 1,697,145 Agency CMO 68,886 — (5,025) 63,861 Agency MBS 2,533,669 21 (336,341) 2,197,349 Agency CMBS 1,697,243 — (241,324) 1,455,919 CMBS 949,535 — (26,607) 922,928 CLO 7,219 — (16) 7,203 Corporate debt 797,931 — (95,759) 702,172 Private label MBS 49,408 — (5,098) 44,310 Other 12,532 — (666) 11,866 Available-for-sale debt securities $ 9,026,804 $ 21 $ (941,781) $ 8,085,044 At December 31, 2021 (In thousands) Amortized Unrealized Unrealized Fair Value (1) U.S. Treasury notes $ 398,664 $ — $ (1,698) $ 396,966 Agency CMO 88,109 2,326 (51) 90,384 Agency MBS 1,568,293 36,130 (11,020) 1,593,403 Agency CMBS 1,248,548 2,537 (18,544) 1,232,541 CMBS 887,640 506 (1,883) 886,263 CLO 21,860 — (13) 21,847 Corporate debt 14,583 — (1,133) 13,450 Available-for-sale debt securities $ 4,227,697 $ 41,499 $ (34,342) $ 4,234,854 (1) Fair value represents net carrying value. No ACL has been recorded on available-for-sale debt securities at September 30, 2022 and December 31, 2021, as the securities held are high credit quality and investment grade. The increase of $3.9 billion in available-for-sale debt securities from December 31, 2021 to September 30, 2022, is primarily attributed to $4.4 billion of investment securities acquired from Sterling in the merger, all of which were classified as Unrealized Losses The following tables summarize the gross unrealized losses and fair value of available-for-sale debt securities by length of time each major security type has been in a continuous unrealized loss position: At September 30, 2022 Less Than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized Number of Fair Unrealized U.S. Treasury notes $ 713,263 $ (42,151) $ — $ — 23 $ 713,263 $ (42,151) Government agency debentures 269,028 (42,954) — — 20 269,028 (42,954) Municipal bonds and notes 1,696,419 (145,840) — — 499 1,696,419 (145,840) Agency CMO 62,951 (5,013) 910 (12) 39 63,861 (5,025) Agency MBS 1,794,195 (252,060) 401,864 (84,281) 460 2,196,059 (336,341) Agency CMBS 991,740 (154,725) 464,179 (86,599) 132 1,455,919 (241,324) CMBS 534,261 (14,954) 388,667 (11,653) 53 922,928 (26,607) CLO — — 7,203 (16) 1 7,203 (16) Corporate debt 693,493 (94,125) 8,679 (1,634) 106 702,172 (95,759) Private label MBS 44,310 (5,098) — — 3 44,310 (5,098) Other 11,866 (666) — — 4 11,866 (666) Available-for-sale debt securities in unrealized loss position $ 6,811,526 $ (757,586) $ 1,271,502 $ (184,195) 1,340 $ 8,083,028 $ (941,781) At December 31, 2021 Less Than Twelve Months Twelve Months or Longer Total (Dollars in thousands) Fair Unrealized Fair Unrealized Number of Fair Unrealized U.S. Treasury notes $ 396,966 $ (1,698) $ — $ — 8 $ 396,966 $ (1,698) Agency CMO 7,895 (51) — — 2 7,895 (51) Agency MBS 506,602 (7,354) 110,687 (3,666) 70 617,289 (11,020) Agency CMBS 632,213 (6,163) 335,480 (12,381) 28 967,693 (18,544) CMBS 724,762 (1,744) 81,253 (139) 50 806,015 (1,883) CLO — — 21,848 (13) 1 21,848 (13) Corporate debt 4,203 (76) 9,247 (1,057) 3 13,450 (1,133) Available-for-sale debt securities in unrealized loss position $ 2,272,641 $ (17,086) $ 558,515 $ (17,256) 162 $ 2,831,156 $ (34,342) Webster assesses each available-for-sale debt security that is in an unrealized loss position to determine whether the decline in fair value below the amortized cost basis resulted from a credit loss or other factors. The increase in unrealized losses from December 31, 2021 to September 30, 2022 is primarily due to increased portfolio size from the merger with Sterling, and higher market rates. Market prices will approach par as the securities approach maturity. At September 30, 2022, Webster had the intent to hold available-for-sale debt securities with unrealized losses through the anticipated recovery period, and it was more-likely-than-not that the Company would not have to sell these securities before recovery of their amortized cost basis. The issuers of these securities have not, to the Company’s knowledge, established any cause for default on these securities. As a result, the Company expects to recover the securities' entire amortized cost basis. Accordingly, no available-for-sale debt securities were in non-accrual status and there was no ACL recorded at both September 30, 2022 and December 31, 2021. Contractual Maturities The following table summarizes the amortized cost and fair value of available-for-sale debt securities by contractual maturity: At September 30, 2022 (In thousands) Amortized Cost Fair Value Due in one year or less $ 59,790 $ 58,824 Due after one year through five years 1,452,511 1,361,398 Due after five through ten years 1,437,643 1,306,402 Due after ten years 6,076,860 5,358,420 Total available-for-sale debt securities $ 9,026,804 $ 8,085,044 Available-for-sale debt securities that are not due at a single maturity date have been categorized based on the maturity date of the underlying collateral. Actual principal cash flows may differ from this categorization as borrowers have the right to repay their obligations with or without prepayment penalties. Sales of Available-for Sale Debt Securities During the three and nine months ended September 30, 2022, Webster sold Municipal bonds and notes classified as Other Information The following table summarizes available-for-sale debt securities pledged for deposits, borrowings, and other purposes: (In thousands) At September 30, 2022 At December 31, 2021 Available-for-sale debt securities pledged for deposits, at fair value $ 3,678,364 $ 855,323 Available-for-sale debt securities pledged for borrowings and other, at fair value 1,282,501 924,841 Total available-for-sale debt securities pledged $ 4,960,865 $ 1,780,164 At September 30, 2022, Webster had callable available-for-sale debt securities with an aggregate carrying value of $3.0 billion. Held-to-Maturity The following tables summarize the amortized cost, fair value, and ACL on held-to-maturity debt securities by major type: At September 30, 2022 (In thousands) Amortized Unrealized Unrealized Fair Value Allowance Net Carrying Value Agency CMO $ 29,854 $ — $ (2,063) $ 27,791 $ — $ 29,854 Agency MBS 2,701,984 674 (379,332) 2,323,326 — 2,701,984 Agency CMBS 2,691,955 — (372,838) 2,319,117 — 2,691,955 Municipal bonds and notes 930,390 208 (92,284) 838,314 209 930,181 CMBS 151,864 — (10,293) 141,571 — 151,864 Held-to-maturity debt securities $ 6,506,047 $ 882 $ (856,810) $ 5,650,119 $ 209 $ 6,505,838 At December 31, 2021 (In thousands) Amortized Unrealized Unrealized Fair Value Allowance Net Carrying Value Agency CMO $ 42,405 $ 655 $ (25) $ 43,035 $ — $ 42,405 Agency MBS 2,901,593 71,444 (11,788) 2,961,249 — 2,901,593 Agency CMBS 2,378,475 11,202 (43,844) 2,345,833 — 2,378,475 Municipal bonds and notes 705,918 51,572 — 757,490 214 705,704 CMBS 169,948 3,381 — 173,329 — 169,948 Held-to-maturity debt securities $ 6,198,339 $ 138,254 $ (55,657) $ 6,280,936 $ 214 $ 6,198,125 Accrued interest receivable of $19.7 million and $21.2 million at September 30, 2022 and December 31, 2021, respectively, is excluded from amortized cost and is reported in accrued interest receivable and other assets on the accompanying Condensed Consolidated Balance Sheets. An ACL on held-to-maturity debt securities is recorded for certain Municipal bonds and notes to account for expected lifetime credit losses. Agency securities represent obligations issued by a U.S. government-sponsored enterprise or other The following table summarizes the activity in the ACL on held-to-maturity debt securities: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Balance, beginning of period $ 210 $ 382 $ 214 $ 299 (Benefit) for credit losses (1) (148) (5) (65) Balance, end of period $ 209 $ 234 $ 209 $ 234 Contractual Maturities The following table summarizes the amortized cost and fair value of held-to-maturity debt securities by contractual maturity: At September 30, 2022 (In thousands) Amortized Cost Fair Value Due in one year or less $ 2,158 $ 2,155 Due after one year through five years 52,383 52,315 Due after five years through ten years 334,065 312,347 Due after ten years 6,117,441 5,283,302 Total held-to-maturity debt securities $ 6,506,047 $ 5,650,119 Held-to-maturity debt securities that are not due at a single maturity date have been categorized based on the maturity date of the underlying collateral. Actual principal cash flows may differ from this categorization as borrowers have the right to repay their obligations with or without prepayment penalties. Credit Quality Information The Company monitors the credit quality of held-to-maturity debt securities through credit ratings provided by Standard & Poor's Rating Services (S&P), Moody's Investor Services (Moody's), Fitch Ratings, Inc., Kroll Bond Rating Agency, or DBRS Inc. Credit ratings express opinions about the credit quality of a debt security, and are updated at each quarter end. Investment grade debt securities are rated BBB- or higher by S&P, or Baa3 or higher by Moody's, and are generally considered by the rating agencies and market participants to be of low credit risk. Conversely, debt securities rated below investment grade, which are labeled as speculative grade by the rating agencies, are considered to have distinctively higher credit risk than investment grade debt securities. There were no speculative grade held-to-maturity debt securities at September 30, 2022 and The following tables summarize the amortized cost basis of held-to-maturity debt securities based on their lowest publicly available credit rating: September 30, 2022 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMO $ — $ 29,854 $ — $ — $ — $ — $ — $ — $ — Agency MBS — 2,701,984 — — — — — — — Agency CMBS — 2,691,955 — — — — — — — Municipal bonds and notes 336,528 163,482 255,616 117,095 38,349 4,165 — 95 15,060 CMBS 151,864 — — — — — — — — Held-to-maturity debt securities $ 488,392 $ 5,587,275 $ 255,616 $ 117,095 $ 38,349 $ 4,165 $ — $ 95 $ 15,060 December 31, 2021 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMO $ — $ 42,405 $ — $ — $ — $ — $ — $ — $ — Agency MBS — 2,901,593 — — — — — — — Agency CMBS — 2,378,475 — — — — — — — Municipal bonds and notes 207,426 119,804 227,106 104,232 35,878 8,260 — 95 3,117 CMBS 169,948 — — — — — — — — Held-to-maturity debt securities $ 377,374 $ 5,442,277 $ 227,106 $ 104,232 $ 35,878 $ 8,260 $ — $ 95 $ 3,117 At September 30, 2022 and December 31, 2021, there were no held-to-maturity debt securities past due under the terms of their agreements or in non-accrual status. Other Information The following table summarizes held-to-maturity debt securities pledged for deposits, borrowings, and other purposes: (In thousands) At September 30, 2022 At December 31, 2021 Held-to-maturity debt securities pledged for deposits, at amortized cost $ 2,026,305 $ 1,834,117 Held-to-maturity debt securities pledged for borrowings and other, at amortized cost 269,920 1,243,139 Total held-to-maturity debt securities pledged $ 2,296,225 $ 3,077,256 At September 30, 2022, Webster had callable held-to-maturity debt securities with an aggregate carrying value of $0.9 billion.

Loans and Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2022
Loans and Leases Receivable Disclosure [Abstract]
Loans and Leases	Loans and Leases The following table summarizes loans and leases by portfolio segment and class: (In thousands) At September 30, At December 31, 2021 Commercial non-mortgage $ 15,148,507 $ 6,882,480 Asset-based 1,803,719 1,067,248 Commercial real estate 12,742,888 5,463,321 Multi-family 6,119,731 1,139,859 Equipment financing 1,764,289 627,058 Warehouse lending 894,438 — Commercial portfolio 38,473,572 15,179,966 Residential 7,617,955 5,412,905 Home equity 1,662,756 1,593,559 Other consumer 69,592 85,299 Consumer portfolio 9,350,303 7,091,763 Loans and leases $ 47,823,875 $ 22,271,729 The increase of $25.6 billion in loans and leases from December 31, 2021 to September 30, 2022 is primarily attributed to the $20.5 billion of gross loans and leases acquired from Sterling in the merger, which included a $317.6 million purchase discount. The carrying amount of loans and leases at September 30, 2022 and December 31, 2021 includes net unamortized Non-Accrual and Past Due Loans and Leases The following tables summarize the aging of accrual and non-accrual loans and leases by class: At September 30, 2022 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total Past Due and Non-accrual Current Total Loans Commercial non-mortgage $ 12,270 $ 3,958 $ 703 $ 61,598 $ 78,529 $ 15,069,978 $ 15,148,507 Asset-based — — — 25,093 25,093 1,778,626 1,803,719 Commercial real estate 5,172 134 — 41,961 47,267 12,695,621 12,742,888 Multi-family 677 86 — 1,972 2,735 6,116,996 6,119,731 Equipment financing 3,261 1,358 — 13,328 17,947 1,746,342 1,764,289 Warehouse lending — — — — — 894,438 894,438 Commercial portfolio 21,380 5,536 703 143,952 171,571 38,302,001 38,473,572 Residential 8,969 3,527 — 25,309 37,805 7,580,150 7,617,955 Home equity 4,083 1,157 — 30,700 35,940 1,626,816 1,662,756 Other consumer 321 169 — 272 762 68,830 69,592 Consumer portfolio 13,373 4,853 — 56,281 74,507 9,275,796 9,350,303 Total $ 34,753 $ 10,389 $ 703 $ 200,233 $ 246,078 $ 47,577,797 $ 47,823,875 At December 31, 2021 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total Past Due and Non-accrual Current Total Loans Commercial non-mortgage $ 3,729 $ 4,524 $ 1,977 $ 59,607 $ 69,837 $ 6,812,643 $ 6,882,480 Asset-based — — — 2,086 2,086 1,065,162 1,067,248 Commercial real estate 508 417 519 5,046 6,490 5,456,831 5,463,321 Multi-family — — — — — 1,139,859 1,139,859 Equipment financing 1,034 — — 3,728 4,762 622,296 627,058 Commercial portfolio 5,271 4,941 2,496 70,467 83,175 15,096,791 15,179,966 Residential 3,212 368 — 15,747 19,327 5,393,578 5,412,905 Home equity 3,467 1,600 — 23,489 28,556 1,565,003 1,593,559 Other consumer 379 181 — 224 784 84,515 85,299 Consumer portfolio 7,058 2,149 — 39,460 48,667 7,043,096 7,091,763 Total $ 12,329 $ 7,090 $ 2,496 $ 109,927 $ 131,842 $ 22,139,887 $ 22,271,729 The following table provides additional information on non-accrual loans and leases: At September 30, 2022 At December 31, 2021 (In thousands) Non-accrual Non-accrual with No Allowance Non-accrual Non-accrual with No Allowance Commercial non-mortgage $ 61,598 $ 27,002 $ 59,607 $ 4,802 Asset-based 25,093 1,525 2,086 2,086 Commercial real estate 41,961 4,028 5,046 4,310 Multi-family 1,972 1,111 — — Equipment financing 13,328 1,955 3,728 — Commercial portfolio 143,952 35,621 70,467 11,198 Residential 25,309 9,540 15,747 10,584 Home equity 30,700 17,416 23,489 18,920 Other consumer 272 3 224 2 Consumer portfolio 56,281 26,959 39,460 29,506 Total $ 200,233 $ 62,580 $ 109,927 $ 40,704 Interest on non-accrual loans and leases that would have been recognized as additional interest income had the loans and leases been current in accordance with their original terms totaled $7.6 million and $2.4 million for the three months ended September 30, 2022 and 2021, respectively, and $14.1 million and $7.2 million for the nine months ended September 30, 2022 and 2021, respectively. Allowance for Credit Losses on Loans and Leases The following tables summarize the change in the ACL on loans and leases by portfolio segment: At or for the three months ended September 30, 2022 2021 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Balance, beginning of period $ 511,745 $ 59,754 $ 571,499 $ 263,071 $ 44,874 $ 307,945 Provision (benefit) 34,513 (3,161) 31,352 7,681 217 7,898 Charge-offs (31,356) (1,453) (32,809) (1,723) (2,053) (3,776) Recoveries 1,413 2,870 4,283 142 2,713 2,855 Balance, end of period $ 516,315 $ 58,010 $ 574,325 $ 269,171 $ 45,751 $ 314,922 At or for the nine months ended September 30, 2022 2021 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Balance, beginning of period $ 257,877 $ 43,310 $ 301,187 $ 312,244 $ 47,187 $ 359,431 Initial allowance for PCD loans and leases (1) 78,376 9,669 88,045 — — — Provision (benefit) 230,881 1,267 232,148 (37,049) (2,386) (39,435) Charge-offs (61,361) (3,469) (64,830) (8,638) (7,835) (16,473) Recoveries 10,542 7,233 17,775 2,614 8,785 11,399 Balance, end of period $ 516,315 $ 58,010 $ 574,325 $ 269,171 $ 45,751 $ 314,922 Individually evaluated for impairment 36,394 13,278 49,672 7,791 4,308 12,099 Collectively evaluated for impairment $ 479,921 $ 44,732 $ 524,653 $ 261,380 $ 41,443 $ 302,823 (1) Represents the establishment of the initial reserve for PCD loans and leases, which is reported net of $48.3 million of day one charge-offs recognized at the date of acquisition in accordance with GAAP. Credit Quality Indicators To measure credit risk for the commercial portfolio, the Company employs a dual grade credit risk grading system for estimating the PD and LGD. The credit risk grade system assigns a rating to each borrower and to the facility, which together form a Composite Credit Risk Profile. The credit risk grade system categorizes borrowers by common financial characteristics that measure the credit strength of borrowers and facilities by common structural characteristics. The Composite Credit Risk Profile has ten grades, with each grade corresponding to a progressively greater risk of loss. Grades (1) to (6) are considered pass ratings, and grades (7) to (10) are considered criticized, as defined by the regulatory agencies. A (7) "Special Mention" rating has a potential weakness that, if left uncorrected, may result in deterioration of the repayment prospects for the asset. A (8) "Substandard" rating has a well-defined weakness that jeopardizes the full repayment of the debt. A (9) "Doubtful" rating has all of the same weaknesses as a substandard asset with the added characteristic that the weakness makes collection or liquidation in full given current facts, conditions, and values improbable. Assets classified as a (10) "Loss" rating are considered uncollectible and are charged-off. Risk ratings, which are assigned to differentiate risk within the portfolio, are reviewed on an ongoing basis and revised to reflect changes in a borrower's current financial position and outlook, risk profile, and the related collateral and structural position. Loan officers review updated financial information or other loan factors on at least an annual basis for all pass rated loans to assess the accuracy of the risk grade. Criticized loans undergo more frequent reviews and enhanced monitoring. The following tables summarize the amortized cost basis of commercial loans and leases by Composite Credit Risk Profile grade and origination year: At September 30, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total Commercial non-mortgage: Pass $ 4,106,108 $ 2,132,870 $ 1,120,386 $ 883,826 $ 685,660 $ 890,405 $ 4,906,060 $ 14,725,315 Special mention 73,417 13,288 — 310 1,118 14,781 43,220 146,134 Substandard 25,231 1,442 72,161 38,086 71,694 18,809 46,113 273,536 Doubtful — 4 — — — — 3,518 3,522 Commercial non-mortgage 4,204,756 2,147,604 1,192,547 922,222 758,472 923,995 4,998,911 15,148,507 Asset-based: Pass 8,072 7,610 16,883 15,729 14,561 56,370 1,563,434 1,682,659 Special mention — — — — — — 40,279 40,279 Substandard — — 10,017 1,525 — — 69,239 80,781 Asset-based 8,072 7,610 26,900 17,254 14,561 56,370 1,672,952 1,803,719 Commercial real estate: Pass 2,428,963 2,248,840 1,760,942 1,803,958 1,128,337 2,873,117 107,178 12,351,335 Special mention 21,974 8,267 33,548 22,300 91,283 60,346 — 237,718 Substandard — 1,502 8,904 29,282 24,376 89,736 — 153,800 Doubtful — — — 1 — 34 — 35 Commercial real estate 2,450,937 2,258,609 1,803,394 1,855,541 1,243,996 3,023,233 107,178 12,742,888 Multi-family: Pass 1,309,097 1,123,973 453,324 698,885 489,177 1,843,835 68,623 5,986,914 Special mention — 37,668 — 95 40,506 9,915 9,276 97,460 Substandard — — 386 919 12,760 21,292 — 35,357 Multi-family 1,309,097 1,161,641 453,710 699,899 542,443 1,875,042 77,899 6,119,731 Equipment financing: Pass 328,553 382,901 378,176 364,598 127,688 126,879 — 1,708,795 Special mention — 195 573 1,691 6,826 1,128 — 10,413 Substandard 481 5,854 18,694 5,758 5,884 8,410 — 45,081 Equipment financing 329,034 388,950 397,443 372,047 140,398 136,417 — 1,764,289 Warehouse lending: Pass — — — — — — 894,438 894,438 Warehouse lending — — — — — — 894,438 894,438 Commercial portfolio $ 8,301,896 $ 5,964,414 $ 3,873,994 $ 3,866,963 $ 2,699,870 $ 6,015,057 $ 7,751,378 $ 38,473,572 At December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total Commercial non-mortgage: Pass $ 2,270,320 $ 1,179,620 $ 757,343 $ 581,633 $ 292,637 $ 275,789 $ 1,182,562 $ 6,539,904 Special mention 14,216 22,892 37,877 15,575 9,721 15,399 27,808 143,488 Substandard 3,660 46,887 30,437 69,963 5,255 19,483 23,403 199,088 Commercial non-mortgage 2,288,196 1,249,399 825,657 667,171 307,613 310,671 1,233,773 6,882,480 Asset-based: Pass 7,609 19,141 12,810 13,456 6,113 25,850 920,496 1,005,475 Special mention — — — 675 — — 59,012 59,687 Substandard — — 2,086 — — — — 2,086 Asset-based 7,609 19,141 14,896 14,131 6,113 25,850 979,508 1,067,248 Commercial real estate: Pass 1,152,431 733,220 1,146,149 594,180 384,664 1,136,384 55,044 5,202,072 Special mention 95 3,084 — 84,475 51,536 79,096 — 218,286 Substandard — 82 227 373 13,874 28,407 — 42,963 Commercial real estate 1,152,526 736,386 1,146,376 679,028 450,074 1,243,887 55,044 5,463,321 Multi-family: Pass 222,875 135,924 185,087 322,688 17,054 203,558 566 1,087,752 Special mention — — — 35,201 — — — 35,201 Substandard — 400 — 6,933 — 9,573 — 16,906 Multi-family 222,875 136,324 185,087 364,822 17,054 213,131 566 1,139,859 Equipment financing: Pass 231,762 188,031 93,547 41,276 14,864 32,588 — 602,068 Special mention — 108 2,229 3,341 — 600 — 6,278 Substandard — 8,388 4,756 2,612 332 2,624 — 18,712 Equipment financing 231,762 196,527 100,532 47,229 15,196 35,812 — 627,058 Commercial portfolio $ 3,902,968 $ 2,337,777 $ 2,272,548 $ 1,772,381 $ 796,050 $ 1,829,351 $ 2,268,891 $ 15,179,966 To measure credit risk for the consumer portfolio, the most relevant credit characteristic is the FICO score, which is a widely used credit scoring system that ranges from 300 to 850. A lower FICO score is indicative of higher credit risk and a higher FICO score is indicative of lower credit risk. FICO scores are updated at least on a quarterly basis. The following tables summarize the amortized cost basis of consumer loans by FICO score and origination year: At September 30, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total Residential: 800+ $ 334,705 $ 911,161 $ 449,160 $ 161,434 $ 33,136 $ 1,006,403 $ — $ 2,895,999 740-799 786,495 1,008,396 336,307 119,615 39,329 769,948 — 3,060,090 670-739 308,253 359,002 115,708 59,946 18,853 407,928 — 1,269,690 580-669 32,779 44,896 14,772 8,598 3,283 150,773 — 255,101 579 and below 10,329 4,800 1,401 60,694 1,453 58,398 — 137,075 Residential 1,472,561 2,328,255 917,348 410,287 96,054 2,393,450 — 7,617,955 Home equity: 800+ 19,190 34,258 27,296 8,379 12,193 55,519 482,328 639,163 740-799 21,246 37,099 18,237 7,772 10,382 36,451 417,840 549,027 670-739 13,616 18,679 8,092 3,693 7,218 33,343 256,835 341,476 580-669 2,016 2,832 1,383 1,616 1,114 13,264 75,542 97,767 579 and below 443 390 659 590 707 5,047 27,487 35,323 Home equity 56,511 93,258 55,667 22,050 31,614 143,624 1,260,032 1,662,756 Other consumer: 800+ 363 246 783 1,229 425 108 21,121 24,275 740-799 646 2,761 2,544 3,227 1,287 889 10,816 22,170 670-739 820 770 3,404 5,281 1,535 281 5,321 17,412 580-669 169 211 424 1,019 263 72 1,560 3,718 579 and below 54 116 110 200 62 31 1,444 2,017 Other consumer 2,052 4,104 7,265 10,956 3,572 1,381 40,262 69,592 Consumer portfolio $ 1,531,124 $ 2,425,617 $ 980,280 $ 443,293 $ 131,240 $ 2,538,455 $ 1,300,294 $ 9,350,303 At December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total Residential: 800+ $ 590,238 $ 428,118 $ 161,664 $ 35,502 $ 105,198 $ 735,517 $ — $ 2,056,237 740-799 1,083,608 421,380 154,960 32,172 95,662 456,722 — 2,244,504 670-739 374,460 135,146 73,499 25,099 34,550 227,863 — 870,617 580-669 38,644 13,782 9,348 3,056 9,000 71,811 — 145,641 579 and below 9,478 1,051 49,252 390 2,519 33,216 — 95,906 Residential 2,096,428 999,477 448,723 96,219 246,929 1,525,129 — 5,412,905 Home equity: 800+ 35,678 30,157 9,591 16,347 11,068 58,189 463,334 624,364 740-799 42,430 22,030 9,413 13,317 7,711 33,777 409,518 538,196 670-739 17,493 9,162 5,889 8,220 5,802 31,160 233,744 311,470 580-669 1,773 1,397 1,298 1,066 1,329 15,042 66,361 88,266 579 and below 380 446 725 1,060 434 5,666 22,552 31,263 Home equity 97,754 63,192 26,916 40,010 26,344 143,834 1,195,509 1,593,559 Other consumer: 800+ 463 1,343 2,398 916 231 118 10,160 15,629 740-799 2,588 5,408 8,303 2,985 379 77 9,528 29,268 670-739 1,061 7,034 13,602 3,859 607 412 5,644 32,219 580-669 256 1,083 2,550 735 216 211 1,267 6,318 579 and below 147 87 215 159 40 21 1,196 1,865 Other consumer 4,515 14,955 27,068 8,654 1,473 839 27,795 85,299 Consumer portfolio $ 2,198,697 $ 1,077,624 $ 502,707 $ 144,883 $ 274,746 $ 1,669,802 $ 1,223,304 $ 7,091,763 Collateral Dependent Loans and Leases A loan or lease is considered collateral dependent when the borrower is experiencing financial difficulty and repayment is substantially expected to be provided through the operation or sale of collateral. At September 30, 2022 and Troubled Debt Restructurings The following table summarizes information related to TDRs: (In thousands) At September 30, At December 31, 2021 Accrual status $ 105,703 $ 110,625 Non-accrual status 65,041 52,719 Total TDRs $ 170,744 $ 163,344 Additional funds committed to borrowers in TDR status $ 1,193 $ 5,975 Specific reserves for TDRs included in the ACL on loans and leases: Commercial portfolio $ 7,274 $ 9,017 Consumer portfolio 3,863 3,745 The respective portions of commercial and consumer TDRs deemed to be uncollectible and charged off were zero and $0.1 million during the three months ended September 30, 2022, and $1.1 million and zero during the three months ended September 30, 2021. The respective portions of commercial and consumer TDRs deemed to be uncollectible and charged off were $10.0 million and $0.2 million during the nine months ended September 30, 2022, and $3.0 million and $0.3 million during the nine months ended September 30, 2021. The following table summarizes loans and leases modified as TDRs by class and modification type: Three months ended September 30, Nine months ended September 30, 2022 2021 2022 2021 (Dollars in thousands) Number of Recorded Investment (1) Number of Recorded Investment (1) Number of Recorded Investment (1) Number of Recorded Investment (1) Commercial non-mortgage Extended maturity 1 $ 24 1 $ 48 3 $ 121 8 $ 605 Maturity/rate combined 3 322 2 94 8 765 8 304 Other (2) 15 17,408 — — 16 40,372 3 114 Commercial real estate Extended maturity — — — — — — 1 183 Equipment financing Other (2) — — — — 1 1,157 — — Residential Extended maturity — — — — 1 893 1 99 Maturity/rate combined 1 124 — — 1 124 2 401 Other (2) 1 298 — — 7 3,060 2 233 Home equity Extended maturity — — — — — — 1 28 Adjusted interest rate — — — — 1 74 — — Maturity/rate combined 3 1,515 — — 14 2,239 6 1,025 Other (2) 6 444 3 153 30 1,777 17 1,121 Total TDRs 30 $ 20,135 6 $ 295 82 $ 50,582 49 $ 4,113 (1) Post-modification balances approximate pre-modification balances. The aggregate amount of charge-offs due to restructurings was not significant. (2) Other includes covenant modifications, forbearance, discharges under Chapter 7 bankruptcy, or other concessions.

Transfers and Servicing of Fina

Transfers and Servicing of Financial Assets	9 Months Ended
	Sep. 30, 2022
Transfers and Servicing [Abstract]
Transfers and Servicing of Financial Assets	Transfers and Servicing of Financial Assets Webster originates and sells residential mortgage loans in the normal course of business, primarily to government-sponsored entities through established programs and securitizations. Residential mortgage origination fees, adjustments for changes in fair value, and any gain or loss recognized on residential mortgage loans sold are included in mortgage banking activities on the accompanying Condensed Consolidated Statements of Income. The following table summarizes information related to mortgage banking activities: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Net gain on sale $ 26 $ 1,063 $ 529 $ 4,523 Origination fees 22 313 194 1,231 Fair value adjustment 38 149 (107) (268) Mortgage banking activities $ 86 $ 1,525 $ 616 $ 5,486 Proceeds from sale $ 1,053 $ 52,256 $ 33,886 $ 199,991 Loans sold with servicing rights retained 147 50,643 30,464 192,421 Under certain circumstances, Webster may decide to sell loans that were not originated or otherwise acquired with the intent to sell. During the three months ended September 30, 2022 and 2021, Webster sold commercial loans not originated for sale for proceeds of $530.1 million and $12.2 million, respectively, which resulted in net (losses) gains on sale of $(0.1) million and $0.6 million, respectively. During the nine months ended September 30, 2022 and 2021, Webster sold commercial loans not originated for sale for proceeds of $648.6 million and $61.3 million, respectively, which resulted in net gains on sale of $3.1 million and $1.3 million, respectively. In addition, Webster may retain servicing rights on its residential mortgage loans sold in the normal course of business. At both September 30, 2022 and December 31, 2021, the aggregate principal balance of residential mortgage loans serviced for others totaled $2.0 billion. Mortgage servicing assets are held at the lower of cost, net of accumulated amortization, or fair market value, and are included in accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets. Webster assesses mortgage servicing assets for impairment each quarter and establishes or adjusts the valuation allowance to the extent that amortized cost exceeds the estimated fair market value. The following table presents the change in the carrying amount for mortgage servicing assets: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Beginning balance $ 8,592 $ 11,501 $ 9,237 $ 13,422 Additions (1) 1,627 483 2,751 1,685 Amortization (2) (382) (1,363) (2,151) (4,295) Adjustment to valuation allowance — (454) — (645) Ending balance $ 9,837 $ 10,167 $ 9,837 $ 10,167 (1) In connection with the Sterling merger, Webster acquired $0.9 million of mortgage servicing assets on January 31, 2022. Loan servicing fees, net of mortgage servicing rights amortization, were $1.3 million and $0.4 million for the three months ended September 30, 2022 and 2021, respectively, and $2.9 million and $1.2 million for the nine months ended

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill The following table summarizes changes in the carrying amount of goodwill: (In thousands) At September 30, At December 31, Balance, beginning of period $ 538,373 $ 538,373 Sterling merger 1,939,432 — Bend acquisition 35,966 — Balance, end of period $ 2,513,771 $ 538,373 Information regarding goodwill by reportable segment can be found within Note 16: Segment Reporting. Other Intangible Assets The following table summarizes other intangible assets: At September 30, 2022 At December 31, 2021 (In thousands) Gross Carrying Amount (1) Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Core deposits $ 145,725 $ 32,022 $ 113,703 $ 26,625 $ 18,516 $ 8,109 Customer relationships 115,000 21,434 93,566 21,000 11,240 9,760 Total other intangible assets $ 260,725 $ 53,456 $ 207,269 $ 47,625 $ 29,756 $ 17,869 (1) In connection with the Sterling merger and Bend acquisition, Webster recorded a $119.1 million core deposit intangible and $94.0 million of customer relationship intangibles, all of which are being amortized on an accelerated basis over a period of The remaining estimated aggregate future amortization expense for other intangible assets as of September 30, 2022 is as follows: (In thousands) Amortization Expense Remainder of 2022 $ 8,230 2023 30,315 2024 24,442 2025 21,455 2026 21,455 Thereafter 101,372

Deposits

Deposits	9 Months Ended
	Sep. 30, 2022
Deposit Liabilities [Abstract]
Deposits	Deposits The following table summarizes deposits by type: (In thousands) At September 30, At December 31, Non-interest-bearing: Demand $ 13,849,812 $ 7,060,488 Interest-bearing: Health savings accounts 7,889,310 7,397,582 Checking 9,203,220 4,182,497 Money market 11,156,579 3,718,953 Savings 9,340,372 5,689,739 Time deposits 2,569,594 1,797,770 Total interest-bearing $ 40,159,075 $ 22,786,541 Total deposits $ 54,008,887 $ 29,847,029 Time deposits, money market, and interest-bearing checking obtained through brokers $ 613,305 $ 120,392 Aggregate amount of time deposit accounts that exceeded the FDIC limit 551,132 256,522 Demand deposit overdrafts reclassified as loan balances 9,148 1,577 The following table summarizes the scheduled maturities of time deposits: (In thousands) At September 30, Remainder of 2022 $ 827,351 2023 1,353,411 2024 161,239 2025 134,877 2026 59,115 Thereafter 33,601 Total time deposits $ 2,569,594

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Borrowings	Borrowings The following table summarizes securities sold under agreements to repurchase and other borrowings: At September 30, 2022 At December 31, 2021 (Dollars in thousands) Total Outstanding Rate Total Outstanding Rate Securities sold under agreements to repurchase (1) : Original maturity of one year or less $ 312,089 0.11 % $ 474,896 0.11 % Original maturity of greater than one year, non-callable (2) — — 200,000 1.32 Total securities sold under agreements to repurchase (1) 312,089 0.11 674,896 0.47 Federal funds purchased 953,325 3.17 — — Securities sold under agreements to repurchase and other borrowings $ 1,265,414 2.41 $ 674,896 0.47 (1) Webster has the right of offset with respect to all repurchase agreement assets and liabilities. Total securities sold under agreements to repurchase are presented as gross transactions, as only liabilities are outstanding for the periods presented. (2) During the three months September 30, 2022, Webster and its repurchase agreement counterparty agreed to fully extinguish two $100 million long-term, structured repurchase agreements. As a result, a net fee of $2.5 million was paid to Webster, which was recognized as a gain and recorded within other non-interest income on the Condensed Consolidated Statements of Operations. Securities sold under agreements to repurchase are used as a source of borrowed funds and are collateralized by Agency MBS and corporate bonds. The Company's repurchase agreement counterparties are limited to primary dealers in government securities, and commercial and municipal customers through the Corporate Treasury function. Webster may also purchase unsecured term and overnight federal funds to satisfy its short-term liquidity needs. The following table summarizes information for FHLB advances: At September 30, 2022 At December 31, 2021 (Dollars in thousands) Total Outstanding Weighted- Total Outstanding Weighted- Maturing within 1 year $ 3,500,145 3.03 % $ 90 — % After 1 but within 2 years 122 2.51 202 2.95 After 2 but within 3 years — — — — After 3 but within 4 years — — — — After 4 but within 5 years — — — — After 5 years 10,450 2.03 10,705 2.03 Total FHLB advances $ 3,510,717 3.03 $ 10,997 2.03 Aggregate carrying value of assets pledged as collateral $ 9,973,866 $ 7,556,034 Remaining borrowing capacity at FHLB 3,513,563 5,087,294 Webster Bank may borrow up to the amount of eligible mortgages and securities that have been pledged as collateral to secure FHLB advances, which primarily include certain residential and commercial real estate loans and home equity lines of credit. Webster Bank was in compliance with its FHLB collateral requirements at both September 30, 2022 and December 31, 2021. The following table summarizes long-term debt: (Dollars in thousands) At September 30, At December 31, 4.375% Senior fixed-rate notes due February 15, 2024 $ 150,000 $ 150,000 4.100% Senior fixed-rate notes due March 25, 2029 (1) 334,796 338,811 4.000% Subordinated fixed-to-floating rate notes due December 30, 2029 274,000 — 3.875% Subordinated fixed-to-floating rate notes due November 1, 2030 225,000 — Junior subordinated debt Webster Statutory Trust I floating-rate notes due September 17, 2033 (2) 77,320 77,320 Total senior and subordinated debt 1,061,116 566,131 Discount on senior fixed-rate notes (811) (974) Debt issuance cost on senior fixed-rate notes (1,924) (2,226) Premium on subordinated fixed-to-floating rate notes 16,463 — Long-term debt $ 1,074,844 $ 562,931 (1) Webster de-designated its fair value hedging relationship on these senior notes in 2020. A basis adjustment of $34.8 million and $38.8 million at September 30, 2022 and December 31, 2021, respectively, is included in the carrying value and is being amortized over the remaining life of the senior notes. (2) The interest rate on the Webster Statutory Trust I floating-rate notes, which varies quarterly based on 3-month LIBOR plus 2.95%, was 6.48% and 3.17% at September 30, 2022 and December 31, 2021, respectively. Webster assumed $274.0 million in aggregate principal amount of 4.00% fixed-to-floating rate subordinated notes due on December 30, 2029 (the 2029 subordinated notes) in connection with the Sterling merger. The 2029 subordinated notes were issued by Sterling on December 16, 2019 through a public offering, and are redeemable at a price equal to the total principal amount plus any accrued and unpaid interest thereon, in whole or in part by Webster on December 30, 2024, or any interest payment date thereafter, upon the occurrence of certain specified events. Until December 30, 2024, the interest rate is fixed at 4.00% and payable semi-annually in arrears on each June 30 and December 30. From December 30, 2024 through the earlier of maturity or redemption, the 2029 subordinated notes will bear interest at a floating rate per annum equal to three-month term SOFR plus 253 basis points, payable quarterly in arrears on each March 30, June 30, September 30, and December 30. In addition, Webster assumed $225.0 million in aggregate principal amount of 3.875% fixed-to-floating rate subordinated notes due on November 1, 2030 (the 2030 subordinated notes) in connection with the Sterling merger. The 2030 subordinated notes were issued by Sterling on October 30, 2020 through a public offering, and are redeemable at a price equal to the total principal amount plus any accrued and unpaid interest thereon, in whole or in part by Webster on December 30, 2024, or any interest payment date thereafter, upon the occurrence of certain specified events. Until November 1, 2025, the interest rate is fixed at 3.875% and payable semi-annually in arrears on each May 1 and December 30. From November 1, 2025 through the earlier of maturity or redemption, the 2030 subordinated notes will bear interest at a floating rate per annum equal to three-month term SOFR plus 369 basis points, payable quarterly in arrears on each February 1, May 1, August 1, and November 1. Webster recorded the 2029 and 2030 subordinated notes at their estimated fair value of $281.0 million and $235.9 million, respectively, on the merger effective date. The purchase premiums are being amortized into interest expense over the remaining lives of the subordinated notes.

Accumulated Other Comprehensive

Accumulated Other Comprehensive (Loss) Income, Net of Tax	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Accumulated Other Comprehensive (Loss) Income, Net of Tax	Accumulated Other Comprehensive (Loss) Income, Net of Tax The following tables summarize the changes in each component of accumulated other comprehensive (loss) income, net of tax: Three months ended September 30, 2022 Nine months ended September 30, 2022 (In thousands) Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Balance, beginning of period $ (445,616) $ (2,082) $ (33,634) $ (481,332) $ 4,536 $ 6,070 $ (33,186) $ (22,580) Other comprehensive (loss) before reclassifications (243,872) (14,416) (248) (258,536) (694,024) (24,099) (1,295) (719,418) Amounts reclassified from accumulated other comprehensive (loss) 1,641 717 609 2,967 1,641 2,248 1,208 5,097 Other comprehensive (loss) income, net of tax (242,231) (13,699) 361 (255,569) (692,383) (21,851) (87) (714,321) Balance, end of period $ (687,847) $ (15,781) $ (33,273) $ (736,901) $ (687,847) $ (15,781) $ (33,273) $ (736,901) Three months ended September 30, 2021 Nine months ended September 30, 2021 (In thousands) Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Balance, beginning of period $ 35,598 $ 13,894 $ (43,602) $ 5,890 $ 67,424 $ 19,918 $ (45,086) $ 42,256 Other comprehensive (loss) before reclassifications (3,394) (2,560) — (5,954) (35,220) (10,205) — (45,425) Amounts reclassified from accumulated other comprehensive (loss) — 829 743 1,572 — 2,450 2,227 4,677 Other comprehensive (loss) income, net of tax (3,394) (1,731) 743 (4,382) (35,220) (7,755) 2,227 (40,748) Balance, end of period $ 32,204 $ 12,163 $ (42,859) $ 1,508 $ 32,204 $ 12,163 $ (42,859) $ 1,508 The following table further summarizes the amounts reclassified from accumulated other comprehensive (loss) income: Three months ended Nine months ended Associated Line Item on the Accumulated Other Comprehensive September 30, September 30, 2022 2021 2022 2021 (In thousands) Securities available-for-sale: Net realized (losses) $ (2,234) $ — $ (2,234) $ — (Loss) on sale of investment securities, net Tax benefit 593 — 593 — Income tax expense Net of tax $ (1,641) $ — $ (1,641) $ — Derivative instruments: Hedge terminations $ (76) $ (76) $ (229) $ (229) Interest expense Premium amortization (909) (1,046) (2,856) (3,088) Interest income Tax benefit 268 293 837 867 Income tax expense Net of tax $ (717) $ (829) $ (2,248) $ (2,450) Defined benefit pension and other Actuarial loss amortization $ (835) $ (1,008) $ (1,657) $ (3,023) Other non-interest expense Tax benefit 226 265 449 796 Income tax expense Net of tax $ (609) $ (743) $ (1,208) $ (2,227)

Regulatory Capital and Restrict

Regulatory Capital and Restrictions	9 Months Ended
	Sep. 30, 2022
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Capital and Restrictions	Regulatory Capital and Restrictions Capital Requirements Webster Financial Corporation and Webster Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory actions by regulators that could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, both Webster Financial Corporation and Webster Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated pursuant to regulatory directives. Capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by the Basel III Capital Rules to ensure capital adequacy require the Company to maintain minimum ratios of CET1 capital to total risk-weighted assets (CET1 risk-based capital), Tier 1 capital to total risk-weighted assets (Tier 1 risk-based capital), Total capital to total risk-weighted assets (Total risk-based capital), and Tier 1 capital to average tangible assets (Tier 1 leverage capital), as defined in the regulations. CET1 capital consists of common shareholders’ equity less deductions for goodwill and other intangible assets, and certain deferred tax adjustments. Upon adoption of the Basel III Capital Rules, Webster elected to opt-out of the requirement to include certain components of accumulated other comprehensive income in CET1 capital. Tier 1 capital consists of CET1 capital plus preferred stock. Total capital consists of Tier 1 capital and Tier 2 capital, as defined in the regulations. Tier 2 capital includes permissible portions of subordinated debt and the ACL. At September 30, 2022 and December 31, 2021, Webster Financial Corporation and Webster Bank were both classified as The following tables provides information on the capital ratios for Webster Financial Corporation and Webster Bank: At September 30, 2022 Actual (1) Minimum Requirement Well Capitalized (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Webster Financial Corporation CET1 risk-based capital $ 5,637,725 10.80 % $ 2,348,463 4.5 % $ 3,392,224 6.5 % Total risk-based capital 6,984,237 13.38 4,175,045 8.0 5,218,807 10.0 Tier 1 risk-based capital 5,921,704 11.35 3,131,284 6.0 4,175,045 8.0 Tier 1 leverage capital 5,921,704 8.98 2,637,840 4.0 3,297,301 5.0 Webster Bank CET1 risk-based capital $ 6,487,577 12.46 % $ 2,342,827 4.5 % $ 3,384,084 6.5 % Total risk-based capital 6,957,328 13.36 4,165,026 8.0 5,206,283 10.0 Tier 1 risk-based capital 6,487,577 12.46 3,123,770 6.0 4,165,026 8.0 Tier 1 leverage capital 6,487,577 9.85 2,634,102 4.0 3,292,628 5.0 At December 31, 2021 Actual (1) Minimum Requirement Well Capitalized (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Webster Financial Corporation CET1 risk-based capital $ 2,804,290 11.72 % $ 1,076,871 4.5 % $ 1,555,480 6.5 % Total risk-based capital 3,265,064 13.64 1,914,436 8.0 2,393,046 10.0 Tier 1 risk-based capital 2,949,327 12.32 1,435,827 6.0 1,914,436 8.0 Tier 1 leverage capital 2,949,327 8.47 1,393,607 4.0 1,742,008 5.0 Webster Bank CET1 risk-based capital $ 3,034,883 12.69 % $ 1,075,920 4.5 % $ 1,554,107 6.5 % Total risk-based capital 3,273,300 13.69 1,912,747 8.0 2,390,934 10.0 Tier 1 risk-based capital 3,034,883 12.69 1,434,560 6.0 1,912,747 8.0 Tier 1 leverage capital 3,034,883 8.72 1,392,821 4.0 1,741,026 5.0 (1) In accordance with regulatory capital rules, Webster elected an option to delay the estimated impact of the adoption of CECL on its regulatory capital over a two-year deferral period, which ended on January 1, 2022, and a subsequent three-year transition period ending on December 31, 2024. Therefore, the December 31, 2021 capital ratios and amounts exclude the impact of the increased ACL on loans and leases, held-to-maturity debt securities, and unfunded loan commitments related to the adoption of CECL on January 1, 2020, adjusted for an approximation of the after-tax provision for credit losses attributable to CECL relative to the incurred loss methodology during the deferral period. During the three year transition period, capital ratios will begin to phase out the aggregate amount of the capital benefit provided in the initial two years. For 2022, 2023, and 2024, Webster is allowed 75%, 50%, and 25% of the capital benefit as of December 31, 2021, respectively, with full absorption occurring in 2025. Dividend Restrictions Webster Financial Corporation is dependent upon dividends from Webster Bank to provide funds for the payment of dividends to shareholders and to provide for other cash requirements. Dividends paid by the Bank are subject to various federal and state regulatory limitations. Express approval by the OCC is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels or if the amount would exceed the net income for that year combined with the undistributed net income for the preceding two years. Webster Bank paid $250.0 million and $375.0 million in dividends to Webster Financial Corporation for the three and nine months ended September 30, 2022, and $40.0 million and $160.0 million for the three and nine months ended September 30, 2021, respectively, for which no express approval from the OCC was required. Cash Restrictions

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Variable Interest Entities Webster has an investment interest in the following entities that meet the definition of a variable interest entity. Consolidated Rabbi Trust. The Company established a Rabbi Trust to meet the obligations due under its Deferred Compensation Plan for Directors and Officers and to mitigate expense volatility. The funding of the Rabbi Trust and the discontinuation of the Deferred Compensation Plan for Directors and Officers occurred during 2012. In connection with the Sterling merger, Webster acquired assets held in a separate Rabbi Trust that had been previously established to fund obligations due under the Greater New York Savings Bank Directors' Retirement Plan, which was also assumed from Sterling. Investments held in the Rabbi Trusts consist primarily of mutual funds that invest in equity and fixed income securities. Webster is considered the primary beneficiary of these Rabbi Trusts as it has the power to direct the activities of the Rabbi Trusts that most significantly impact its economic performance and it has the obligation to absorb losses and/or the right to receive benefits of the Rabbi Trusts that could potentially be significant. The Rabbi Trusts' assets are included in accrued interest receivable and other assets on the accompanying Condensed Consolidated Balance Sheets. Investment earnings are included in other non-interest income, and depending on the nature of the underlying assets in the Rabbi Trusts, fair value changes are either recognized in other non-interest income or in other comprehensive (loss) income, net of tax, on the accompanying Condensed Consolidated Statements of Income or on the accompanying Condensed Consolidated Statements of Comprehensive Income, respectively. Information regarding the fair value of the Rabbi Trusts' investments can be found within Note 14: Fair Value Measurements. Non-Consolidated Tax Credit Finance Investments. Webster makes non-marketable equity investments in entities that sponsor affordable housing and other community development projects that qualify for the Low Income Housing Tax Credit (LIHTC) Program pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is not only to assist the Bank in meeting its responsibilities under the CRA, but also to provide a return, primarily through the realization of tax benefits. While Webster's investment in an entity may exceed 50% of its outstanding equity interests, the entity is not consolidated as the Company is not the primary beneficiary. Webster has determined that it is not the primary beneficiary due to its inability to direct the activities that most significantly impact economic performance and the Company does not have the obligation to absorb losses and/or the right to receive benefits. Webster applies the proportional amortization method to subsequently measure its investments in qualified affordable housing projects. The following table summarizes Webster's LIHTC investments and related unfunded commitments: (In thousands) September 30, 2022 December 31, 2021 Gross investment in LIHTC (1) $ 707,619 $ 68,635 Accumulated amortization (56,887) (25,216) Net investment in LIHTC $ 650,732 $ 43,419 Unfunded commitments for LIHTC investments (1) $ 311,282 $ 11,106 (1) In connection with the Sterling merger, Webster acquired $515.6 million of LIHTC investments and assumed $267.3 million of unfunded commitments for LIHTC investments on January 31, 2022. The aggregate carrying value of Webster's LIHTC investments is included in accrued interest receivable and other assets on the accompanying Condensed Consolidated Balance Sheets, and represents the Company's maximum exposure to loss. The related unfunded commitments are included in accrued expenses and other liabilities on the accompanying Condensed Consolidated Balance Sheets. In addition to those acquired from Sterling, there were $123.4 million of net commitments approved to fund LIHTC investments during the nine months ended September 30, 2022, and $10.6 million during the nine months ended September 30, 2021. Webster Statutory Trust. Webster owns all the outstanding common stock of Webster Statutory Trust, a financial vehicle that has issued, and in the future may issue, trust preferred securities. The Company is not the primary beneficiary of Webster Statutory Trust. Webster Statutory Trust's only assets are junior subordinated debentures that are issued by the Company, which were acquired using the proceeds from the issuance of trust preferred securities and common stock. The junior subordinated debentures are included in long-term debt on the accompanying Condensed Consolidated Balance Sheets, and the related interest expense is reported as interest expense on long-term debt on the accompanying Condensed Consolidated Statements of Income. Additional information regarding these junior subordinated debentures can be found within Note 8: Borrowings. Other Non-Marketable Investments. Webster invests in alternative investments comprising interests in non-public entities that cannot be redeemed since the investment is distributed as the underlying equity is liquidated. The ultimate timing and amount of these distributions cannot be predicted with reasonable certainty. For each of these alternative investments that is classified as a variable interest entity, the Company has determined that it is not the primary beneficiary due to its inability to direct the activities that most significantly impact economic performance. The aggregate carrying value of Webster's other non-marketable investments was $124.3 million and $61.5 million at September 30, 2022 and December 31, 2021, respectively, which is included in accrued interest receivable and other assets on the accompanying Condensed Consolidated Balance Sheets, and its maximum exposure to loss, including unfunded commitments, was $219.1 million and $95.9 million, respectively. Information regarding the fair value of other non-marketable investments can be found within Note 14: Fair Value Measurements. Additional Information regarding Webster's consolidation of variable interest entities can be found within Note 1: Summary of Significant Accounting Policies in the Consolidated Financial Statements contained in Part II - Item 8. Financial Statements and Supplementary Data of the Company's Annual Reporting on Form 10-K for the year ended December 31, 2021.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The following table summarizes the calculation of basic and diluted earnings per common share: Three months ended September 30, Nine months ended September 30, (In thousands, except per share data) 2022 2021 2022 2021 Net income $ 233,968 $ 95,713 $ 399,532 $ 297,826 Less: Preferred stock dividends 4,162 1,968 11,756 5,906 Net income available to common shareholders 229,806 93,745 387,776 291,920 Less: Earnings allocated to participating securities 2,128 574 3,562 1,661 Earnings applicable to common shareholders $ 227,678 $ 93,171 $ 384,214 $ 290,259 Weighted-average common shares outstanding - basic 173,868 90,038 165,743 89,960 Effect of dilutive securities 76 194 70 226 Weighted-average common shares outstanding - diluted 173,944 90,232 165,813 90,186 Basic earnings per common share $ 1.31 $ 1.03 $ 2.32 $ 3.23 Diluted earnings per common share 1.31 1.03 2.32 3.22 Earnings per common share is calculated under the two-class method in which all earnings (distributed and undistributed) are allocated to common stock and participating securities based on their respective rights to receive dividends. Webster may grant restricted stock, restricted stock units, non-qualified stock options, incentive stock options, or stock appreciation rights to certain employees and directors under its stock-based compensation programs, which entitle recipients to receive Potential common shares from stock options and performance-based restricted stock awards that were not included in the computation of dilutive earnings per common share because they were anti-dilutive under the treasury stock method were 97,294 and 330,688 for the three and nine months ended September 30, 2022, respectively, and zero and 47,161 for the three and nine months ended September 30, 2021, respectively.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Derivative Positions and Offsetting Derivatives Designated in Hedge Relationships . Interest rate swaps allow the Company to change the fixed or variable nature of an interest rate without the exchange of the underlying notional amount. Certain pay fixed/receive variable interest rate swaps are designated as cash flow hedges to effectively convert variable-rate debt into fixed-rate debt, while certain receive fixed/pay variable interest rate swaps are designated as fair value hedges to effectively convert fixed-rate long-term debt into variable-rate debt. Certain purchased options are designated as cash flow hedges. Purchased options allow the Company to limit the potential adverse impact of variable interest rates by establishing a cap or floor rate in exchange for an upfront premium. The purchased options designated as cash flow hedges represent interest rate caps where payment is received from the counterparty if interest rates rise above the cap rate, and interest rate floors where payment is received from the counterparty when interest rates fall below the floor rate. Derivatives Not Designated in Hedge Relationships. The Company also enters into other derivative transactions to manage economic risks but does not designate the instruments in hedge relationships. Further, the Company enters into derivative contracts to accommodate customer needs. Derivative contracts with customers are offset with dealer counterparty transactions structured with matching terms to ensure minimal impact on earnings. The following tables present the notional amounts and fair values, including accrued interest, of derivative positions: At September 30, 2022 Asset Derivatives Liability Derivatives (In thousands) Notional Amounts Fair Value Notional Amounts Fair Value Designated as hedging instruments: Interest rate derivatives (1) $ 850,000 $ 243 $ 2,000,000 $ 16,377 Not designated as hedging instruments: Interest rate derivatives (1) 6,731,008 217,613 6,721,716 409,950 Mortgage banking derivatives (2) 4,445 36 476 3 Other (3) 155,206 1,601 485,375 447 Total not designated as hedging instruments 6,890,659 219,250 7,207,567 410,400 Gross derivative instruments, before netting $ 7,740,659 219,493 $ 9,207,567 426,777 Less: Master netting agreements 16,877 16,877 Cash collateral 185,968 — Total derivative instruments, after netting $ 16,648 $ 409,900 At December 31, 2021 Asset Derivatives Liability Derivatives (In thousands) Notional Amounts Fair Value Notional Amounts Fair Value Designated as hedging instruments: Interest rate derivatives (1) $ 1,000,000 $ 17,583 $ — $ — Not designated as hedging instruments: Interest rate derivatives (1) 4,463,048 141,243 4,372,846 21,570 Mortgage banking derivatives (2) 14,212 80 — — Other (3) 76,755 211 374,688 214 Total not designated as hedging instruments 4,554,015 141,534 4,747,534 21,784 Gross derivative instruments, before netting $ 5,554,015 159,117 $ 4,747,534 21,784 Less: Master netting agreements 6,364 6,364 Cash collateral 19,272 2,119 Total derivative instruments, after netting $ 133,481 $ 13,301 (1) Balances related to clearing houses are presented as a single unit of account. In accordance with their rule books, clearing houses legally characterize variation margin payments as settlement of derivatives rather than collateral against derivative positions. At September 30, 2022 and December 31, 2021, notional amounts of interest rate swaps cleared through clearing houses include $2.9 billion and $0.4 billion for asset derivatives, respectively, and zero and $2.6 billion for liability derivatives, respectively. The related fair values approximate zero. (2) Notional amounts related to residential loans exclude approved floating rate commitments of $2.8 million and $1.0 million at September 30, 2022 and December 31, 2021, respectively. (3) Other derivatives include foreign currency forward contracts related to lending arrangements and customer hedging activity, a Visa equity swap transaction, and risk participation agreements. Notional amounts of risk participation agreements include $103.7 million and $66.0 million for asset derivatives and $464.7 million and $338.2 million for liability derivatives at September 30, 2022 and December 31, 2021, respectively, that have insignificant related fair values. The following tables present fair value positions transitioned from gross to net upon applying counterparty netting agreements: At September 30, 2022 (In thousands) Gross Amount Recognized Derivative Offset Amount Cash Collateral Received/Pledged Net Amount Presented Amounts Not Offset Asset derivatives $ 219,245 $ 16,877 $ 185,968 $ 16,400 $ 16,771 Liability derivatives 16,877 16,877 — — 852 At December 31, 2021 (In thousands) Gross Amount Recognized Derivative Offset Amount Cash Collateral Received/Pledged Net Amount Presented Amounts Not Offset Asset derivatives $ 25,636 $ 6,364 $ 19,272 $ — $ 51 Liability derivatives 8,483 6,364 2,119 — 428 Derivative Activity The following table summarizes the income statement effect of derivatives designated as cash flow hedges: Recognized In Three months ended September 30, Nine months ended September 30, (In thousands) Net Interest Income 2022 2021 2022 2021 Interest rate derivatives Long-term debt $ (76) $ (90) $ (229) $ (334) Interest rate derivatives Interest and fees on loans and leases (483) 2,706 3,320 7,933 Net recognized on cash flow hedges $ (559) $ 2,616 $ 3,091 $ 7,599 The following table summarizes information related to a fair value hedging adjustment: Condensed Consolidated Balance Sheet Line Item in Which Hedged Item is Located Carrying Amount of Hedged Item Cumulative Amount of Fair Value Hedging Adjustment Included in Carrying Amount (In thousands) At September 30, At December 31, At September 30, At December 31, Long-term debt $ 334,796 $ 338,811 $ 34,796 $ 38,811 The following table summarizes the income statement effect of derivatives not designated as hedging instruments: Recognized In Three months ended September 30, Nine months ended September 30, (In thousands) Non-interest Income 2022 2021 2022 2021 Interest rate derivatives Other income $ 6,032 $ 2,727 $ 25,291 $ 7,132 Mortgage banking derivatives Mortgage banking activities 31 38 (47) (556) Other Other income 3,196 611 4,620 780 Total not designated as hedging instruments $ 9,259 $ 3,376 $ 29,864 $ 7,356 Purchased options designated as cash flow hedges exclude time-value premiums from the assessment of hedge effectiveness. Time-value premiums are amortized on a straight-line basis. At September 30, 2022, the remaining unamortized balance of time-value premiums was $3.5 million. Over the next twelve months, an estimated $2.8 million decrease to interest expense will be reclassified from (AOCL) AOCI relating to cash flow hedges, and an estimated $0.3 million increase to interest expense will be reclassified from (AOCL) AOCI relating to hedge terminations. At September 30, 2022, the remaining unamortized loss on terminated cash flow hedges is $0.4 million. The maximum length of time over which forecasted transactions are hedged is 4.5 years. Additional information about cash flow hedge activity impacting (AOCL) AOCI and the related amounts reclassified to interest expense is provided in Note 9: Accumulated Other Comprehensive (Loss) Income, Net of Tax. Information about the valuation methods used to measure the fair value of derivatives is provided in Note 14: Fair Value Measurements. Derivative Exposure. At September 30, 2022, the Company had $64.8 million in initial margin collateral posted at clearing houses. In addition, $186.8 million of cash collateral received is included in cash and due from banks on the accompanying Condensed Consolidated Balance Sheets. Webster regularly evaluates the credit risk of its derivative customers, taking into account the likelihood of default, net exposures, and remaining contractual life, among other related factors. Credit risk exposure is mitigated as transactions with customers are generally secured by the same collateral of the underlying transactions. Current net credit exposure relating to interest rate derivatives with Webster Bank customers was $0.2 million at

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The determination of fair value may require the use of estimates when quoted market prices are not available. Fair value estimates made at a specific point in time are based on management’s judgments regarding future expected losses, current economic conditions, the risk characteristics of each financial instrument, and other subjective factors that cannot be determined with precision. The framework for measuring fair value provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The three levels within the fair value hierarchy are as follows: • Level 1: Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that Webster has the ability to access at the measurement date. • Level 2: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in inactive markets, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, rate volatility, prepayment speeds, and credit ratings), or inputs that are derived principally from or corroborated by market data, correlation, or other means. • Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. This includes certain pricing models or other similar techniques that require significant management judgment or estimation. Assets and Liabilities Measured at Fair Value on a Recurring Basis Available-for-Sale Investment Securities. When unadjusted quoted prices are available in an active market, Webster classifies available-for-sale investment securities within Level 1 of the fair value hierarchy. U.S. Treasury notes have a readily determinable fair value, and therefore are classified within Level 1 of the fair value hierarchy. When quoted market prices are not available, Webster employs an independent pricing service that utilizes matrix pricing to calculate fair value. These fair value measurements consider observable data such as dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayments speeds, credit information, and the respective terms and conditions for debt instruments. Management maintains procedures to monitor the pricing service's results and has a process in place to challenge their valuations and methodologies that appear unusual or unexpected. Government agency debentures, municipal bonds and notes, Agency CMO, Agency MBS, Agency CMBS, CMBS, CLO, corporate debt, private label MBS, and other securities available-for-sale are classified within Level 2 of the fair value hierarchy. Derivative Instruments . The fair values presented for derivative instruments include any accrued interest. Foreign exchange contracts are valued based on unadjusted quoted prices in active markets and accordingly are classified within Level 1 of the fair value hierarchy. Except for mortgage banking derivatives, all other derivative instruments are valued using third-party valuation software, which considers the present value of cash flows discounted using observable forward rate assumptions. The resulting fair value is then validated against valuations performed by independent third parties. These derivative instruments are classified within Level 2 of the fair value hierarchy. Mortgage Banking Derivatives . Webster uses forward sales of mortgage loans and mortgage-backed securities to manage the risk of loss associated with its mortgage loan commitments and mortgage loans held for sale. Prior to closing and funding certain single-family residential mortgage loans, an interest rate lock commitment is generally extended to the borrower. During this in-between time period, Webster is subject to the risk that market interest rates may change. If rates rise, investors generally will pay less to purchase mortgage loans, which would result in a reduction in the gain on sale of the loans, or possibly a loss. In an effort to mitigate this risk, forward delivery sales commitments are established in which Webster agrees to either deliver whole mortgage loans to various investors or issue mortgage-backed securities. The fair value of mortgage banking derivatives is determined based on current market prices for similar assets in the secondary market. Accordingly, mortgage banking derivatives are classified within Level 2 of the fair value hierarchy. Originated Loans Held For Sale . Webster has elected to measure originated loans held for sale at fair value under the fair value option per ASC Topic 825, Financial Instruments. Electing to measure originated loans held for sale at fair value reduces certain timing differences and better reflects the price Webster would expect to receive from the sale of these loans. The fair value of originated loans held for sale is based on quoted market prices of similar loans sold in conjunction with securitization transactions. Accordingly, originated loans held for sale are classified within Level 2 of the fair value hierarchy. The following table compares the fair value to the unpaid principal balance of originated loans held for sale: At September 30, 2022 At December 31, 2021 (In thousands) Fair Value Unpaid Principal Balance Difference Fair Value Unpaid Principal Balance Difference Originated loans held for sale $ 898 $ 1,080 $ (182) $ 4,694 $ 5,034 $ (340) Rabbi Trust Investments. Investments held in each of the Rabbi Trusts consist primarily of mutual funds that invest in equity and fixed income securities. Shares of these mutual funds are valued based on the net asset value (NAV) as reported by the trustee of the funds, which represents quoted prices in active markets. Webster has elected to measure the Rabbi Trusts' investments at fair value. Accordingly, the Rabbi Trusts' investments are classified within Level 1 of the fair value hierarchy. At September 30, 2022, the cost basis of the Rabbi Trusts' investments was $10.3 million. Alternative Investments. Equity investments have a readily determinable fair value when unadjusted quoted prices are available in an active market for identical assets. Accordingly, these alternative investments are classified within Level 1 of the fair value hierarchy. At September 30, 2022, equity investments with a readily determinable fair value had a carrying amount of $0.5 million and no remaining unfunded commitment. During the three and nine months ended September 30, 2022, there were write-downs in fair value of $0.2 million and $1.4 million, respectively, associated with these alternative investments. Equity investments that do not have a readily available fair value may qualify for the NAV practical expedient if they meet certain requirements. Webster's alternative investments measured at NAV consist of investments in non-public entities that cannot be redeemed since investments are distributed as the underlying equity is liquidated. Alternative investments measured at NAV are not classified within the fair value hierarchy. At September 30, 2022, these alternative investments had a carrying amount of $75.2 million and a remaining unfunded commitment of $76.1 million. The following tables summarize the fair values of assets and liabilities measured at fair value on a recurring basis: At September 30, 2022 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets: Available-for-sale investment securities: U.S. Treasury notes $ 713,263 $ — $ — $ 713,263 Government agency debentures — 269,028 — 269,028 Municipal bonds and notes — 1,697,145 — 1,697,145 Agency CMO — 63,861 — 63,861 Agency MBS — 2,197,349 — 2,197,349 Agency CMBS — 1,455,919 — 1,455,919 CMBS — 922,928 — 922,928 CLO — 7,203 — 7,203 Corporate debt — 702,172 — 702,172 Private label MBS — 44,310 — 44,310 Other — 11,866 — 11,866 Total available-for-sale investment securities 713,263 7,371,781 — 8,085,044 Gross derivative instruments, before netting (1) 1,591 217,902 — 219,493 Originated loans held for sale — 898 — 898 Investments held in Rabbi Trust 12,250 — — 12,250 Alternative investments (2) 522 — — 75,728 Total financial assets $ 727,626 $ 7,590,581 $ — $ 8,393,413 Financial Liabilities: Gross derivative instruments, before netting (1) $ 296 $ 426,481 $ — $ 426,777 At December 31, 2021 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets: Available-for-sale investment securities: U.S. Treasury notes $ 396,966 $ — $ — $ 396,966 Agency CMO — 90,384 — 90,384 Agency MBS — 1,593,403 — 1,593,403 Agency CMBS — 1,232,541 — 1,232,541 CMBS — 886,263 — 886,263 CLO — 21,847 — 21,847 Corporate debt — 13,450 — 13,450 Total available-for-sale investment securities 396,966 3,837,888 — 4,234,854 Gross derivative instruments, before netting (1) 187 158,930 — 159,117 Originated loans held for sale — 4,694 — 4,694 Investments held in Rabbi Trust 3,416 — — 3,416 Alternative investments (2) 1,877 — — 27,732 Total financial assets $ 402,446 $ 4,001,512 $ — $ 4,429,813 Financial Liabilities: Gross derivative instruments, before netting (1) $ 141 $ 21,643 $ — $ 21,784 (1) Additional information regarding the impact of netting derivative assets and derivative liabilities, as well as the impact from offsetting cash collateral paid to the same derivative counterparties, can be found within Note 13: Derivative Financial Instruments. (2) Certain alternative investments are recorded at NAV. Assets measured at NAV are not classified within the fair value hierarchy. Assets Measured at Fair Value on a Non-Recurring Basis Webster measures certain assets at fair value on a non-recurring basis. The following is a description of the valuation methodologies used for assets measured at fair value on a non-recurring basis. Alternative Investments. The measurement alternative has been elected for alternative investments without readily determinable fair values that do not qualify for the NAV practical expedient. The measurement alternative requires investments to be measured at cost minus impairment, if any, plus or minus adjustments resulting from observable price changes in orderly transactions for an identical or similar investment of the same issuer. Accordingly, these alternative investments are classified within Level 2 of the fair value hierarchy. At September 30, 2022, the carrying amount of these alternative investments was $31.1 million. There were $0.5 million of net write-ups due to observable price changes and $0.2 million of write-downs due to impairment during both the three and nine months ended September 30, 2022. Loans Transferred to Held for Sale. Once a decision has been made to sell loans not previously classified as held for sale, these loans are transferred into the held for sale category and carried at the lower of cost or fair value. At the time of transfer into held for sale classification, any amount by which cost exceeds fair value is accounted for as a valuation allowance. This activity generally pertains to commercial loans with observable inputs, and therefore, are classified within Level 2 of the fair value hierarchy. However, should these loans include adjustments for changes in loan characteristics based on unobservable inputs, the loans would then be classified within Level 3 of the fair value hierarchy. At September 30, 2022, there were no loans transferred to held for sale on the Condensed Consolidated Balance Sheet. Collateral Dependent Loans and Leases. Loans and leases for which repayment is substantially expected to be provided through the operation or sale of collateral are considered collateral dependent, and are valued based on the estimated fair value of the collateral, less estimated costs to sell at the reporting date, using customized discounting criteria. Accordingly, collateral dependent loans and leases are classified within Level 3 of the fair value hierarchy. Other Real Estate Owned and Repossessed Assets. Other real estate owned (OREO) and repossessed assets are held at the lower of cost or fair value and are considered to be measured at fair value when recorded below cost. The fair value of OREO is calculated using independent appraisals or internal valuation methods, less estimated selling costs, and may consider available pricing guides, auction results, and price opinions. Certain repossessed assets may also require assumptions about factors that are not observable in an active market when determining fair value. Accordingly, OREO and repossessed assets are classified within Level 3 of the fair value hierarchy. At September 30, 2022, the total book value of OREO and repossessed assets was $2.1 million. In addition, the amortized cost of consumer loans secured by residential real estate property that were in process of foreclosure at September 30, 2022 was $9.7 million. Estimated Fair Values of Financial Instruments and Mortgage Servicing Assets Webster is required to disclose the estimated fair values of certain financial instruments and mortgage servicing assets. The following is a description of the valuation methodologies used to estimate fair value for those assets and liabilities. Cash and Cash Equivalents . Given the short time frame to maturity, the carrying amount of cash and cash equivalents, which comprises cash and due from banks and interest-bearing deposits, approximates fair value. Cash and cash equivalents are classified within Level 1 of the fair value hierarchy. Held-to-Maturity Investment Securities . When quoted market prices are not available, Webster employs an independent pricing service that utilizes matrix pricing to calculate fair value. These fair value measurements consider observable data such as dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayments speeds, credit information, and the respective terms and conditions for debt instruments. Management maintains procedures to monitor the pricing service's results and has a process in place to challenge their valuations and methodologies that appear unusual or unexpected. Held-to-maturity investment securities, which include Agency CMO, Agency MBS, Agency CMBS, municipal bonds and notes, and CMBS are classified within Level 2 of the fair value hierarchy. Loans and Leases, net . Except for collateral dependent loans and leases, the fair value of loans and leases held for investment is estimated using a discounted cash flow methodology, based on future prepayments and market interest rates inclusive of an illiquidity premium for comparable loans and leases. The associated cash flows are then adjusted for associated credit risks and other potential losses, as appropriate. Loans and leases are classified within Level 3 of the fair value hierarchy. Mortgage Servicing Assets . Mortgage servicing assets are initially measured at fair value and subsequently measured using the amortization method. Webster assess mortgage servicing assets for impairment each quarter and establishes or adjusts the valuation allowance to the extent that amortized cost exceeds the estimated fair market value. Fair value is calculated as the present value of estimated future net servicing income and relies on market based assumptions for loan prepayment speeds, servicing costs, discount rates, and other economic factors. Accordingly, the primary risk inherent in valuing mortgage servicing assets is the impact of fluctuating interest rates on the related servicing revenue stream. Mortgage servicing assets are classified within Level 3 of the fair value hierarchy. Deposit Liabilities . The fair value of deposit liabilities, which comprises demand deposits, interest-bearing checking, savings, health savings, and money market accounts, reflects the amount payable on demand at the reporting date. Deposit liabilities are classified within Level 2 of the fair value hierarchy. Time Deposits . The fair value of fixed-maturity certificates of deposit is estimated using rates that are currently offered for deposits with similar remaining maturities. Time deposits are classified within Level 2 of the fair value hierarchy. Securities Sold Under Agreements to Repurchase and Other Borrowings . The fair value of securities sold under agreements to repurchase and other borrowings that mature within 90 days approximates their carrying value. The fair value of securities sold under agreements to repurchase and other borrowings that mature after 90 days is estimated using a discounted cash flow methodology based on current market rates and adjusted for associated credit risks, as appropriate. Securities sold under agreements to repurchase and other borrowings are classified within Level 2 of the fair value hierarchy. Federal Home Loan Bank Advances and Long-Term Debt . The fair value of FHLB advances and long-term debt is estimated using a discounted cash flow methodology in which discount rates are matched with the time period of the expected cash flows and adjusted for associated credit risks, as appropriate. FHLB advances and long-term debt are classified within Level 2 of the fair value hierarchy. The following table summarizes the carrying amounts, estimated fair values, and classifications within the fair value hierarchy of selected financial instruments and mortgage servicing assets: At September 30, 2022 At December 31, 2021 (In thousands) Carrying Fair Carrying Fair Assets: Level 1 Cash and cash equivalents $ 613,125 $ 613,125 $ 461,570 $ 461,570 Level 2 Held-to-maturity investment securities 6,505,838 5,650,119 6,198,125 6,280,936 Level 3 Loans and leases, net 47,249,550 45,896,000 21,970,542 21,702,732 Mortgage servicing assets 9,837 27,550 9,237 12,527 Liabilities: Level 2 Deposit liabilities $ 51,439,293 $ 51,439,293 $ 28,049,259 $ 28,049,259 Time deposits 2,569,594 2,503,396 1,797,770 1,794,829 Securities sold under agreements to repurchase and other borrowings 1,265,414 1,243,251 674,896 676,581 FHLB advances 3,510,717 3,509,221 10,997 11,490 Long-term debt (1) 1,074,844 1,030,390 562,931 515,912

Retirement Benefit Plans

Retirement Benefit Plans	9 Months Ended
	Sep. 30, 2022
Retirement Benefits [Abstract]
Retirement Benefit Plans	Retirement Benefit Plans Defined Benefit Pension and Other Postretirement Benefits The following tables summarize the components of net periodic benefit (income) cost: Three months ended September 30, 2022 2021 (In thousands) Pension Plan SERP OPEB Pension Plan SERP OPEB Service cost $ — $ — $ 9 $ — $ — $ — Interest cost 1,441 17 194 1,166 7 4 Expected return on plan assets (3,669) — — (3,595) — — Amortization of actuarial loss (gain) 821 7 7 1,019 8 (20) Net periodic benefit (income) cost $ (1,407) $ 24 $ 210 $ (1,410) $ 15 $ (16) Nine months ended September 30, 2022 2021 (In thousands) Pension Plan SERP Other Benefits Pension Plan SERP Other Benefits Service cost $ — $ — $ 24 $ — $ — $ — Interest cost 4,198 49 551 3,498 20 12 Expected return on plan assets (11,006) — — (10,786) — — Amortization of actuarial loss (gain) 1,667 20 (30) 3,058 25 (60) Net periodic benefit (income) cost $ (5,141) $ 69 $ 545 $ (4,230) $ 45 $ (48) The components of net periodic benefit (income) cost are included within other non-interest expense on the accompanying Condensed Consolidated Statements of Income. The weighted-average expected long-term rate of return on plan assets for the nine months ended September 30, 2022 was 5.50%, as determined at the beginning of the year. In connection with the Sterling merger, Webster assumed the benefit obligations of Sterling's pension and other postretirement benefit plans, which included the Astoria Excess and Supplemental Benefit Plans, Astoria Directors' Retirement Plan, Greater New York Savings Bank Directors' Retirement Plan, Astoria Bank Retiree Health Care Plan, and the Sterling Other Postretirement Life Insurance and Other Plans, totaling $30.5 million as of January 31, 2022. The underfunded status of these plans is included in accrued expenses and other current liabilities on the Condensed Consolidated Balance Sheets.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting Webster's operations are organized into three reportable segments that represent its primary businesses: Commercial Banking, HSA Bank, and Consumer Banking. These segments reflect how executive management responsibilities are assigned, how discrete financial information is evaluated, the type of customer served, and how products and services are provided. Certain Treasury activities, along with the amounts required to reconcile profitability metrics to those reported in accordance with GAAP, are included in the Corporate and Reconciling category. Effective January 1, 2022, Webster realigned its investment services operations from Commercial Banking to Consumer Banking to better serve its customers and deliver operational efficiencies. Under this realignment, $125.4 million of deposits and $4.3 billion of assets under administration (off-balance sheet) were reassigned from Commercial Banking to Consumer Banking. There was no goodwill reallocation nor goodwill impairment as a result of the reorganization. In addition, the non-interest expense allocation methodology was modified to exclude certain overhead and merger-related costs that are not directly related to segment performance. Prior period results of operations have been recasted accordingly to reflect the realignment. As discussed in Note 2: Mergers and Acquisitions, Webster acquired Sterling on January 31, 2022, and the allocation of the purchase price is considered preliminary. Accordingly, of the total $1.9 billion in preliminary goodwill recorded, $1.7 billion and $0.2 million was preliminarily allocated to Commercial Banking and Consumer Banking, respectively. The $36.0 million of goodwill recorded in connection with the Bend acquisition was allocated entirely to HSA Bank. Segment Reporting Methodology Webster uses an internal profitability reporting system to generate information by reportable segment, which is based on a series of management estimates for funds transfer pricing and allocations for non-interest expense, provision for credit losses, income taxes, and equity capital. These estimates and allocations, certain of which are subjective in nature, are periodically reviewed and refined. Changes in estimates and allocations that affect the results of any one reportable segment do not affect the consolidated financial position or results of operations of Webster as a whole. The full profitability measurement reports, which are prepared for each reportable segment, reflect non-GAAP reporting methodologies. The differences between full profitability and GAAP results are reconciled in the Corporate and Reconciling category. Webster allocates interest income and interest expense to each business through an internal matched maturity Funds Transfer Pricing (FTP) process. The goal of the FTP allocation is to encourage loan and deposit growth consistent with the Webster’s overall profitability objectives. The FTP process considers the specific interest rate risk and liquidity risk of financial instruments and other assets and liabilities in each line of business. Loans and leases are assigned an FTP rate for funds used and deposits are assigned an FTP rate for funds provided. The allocation considers the origination date and the earlier of the maturity date or the repricing date of a financial instrument to assign an FTP rate for loans and leases and deposits originated each day. The FTP process transfers the corporate interest rate risk exposure to the treasury function included within the Corporate and Reconciling category, where such exposures are centrally managed. Webster allocates a majority of non-interest expense to each reportable segment using an activity and driver-based costing process. Costs, including shared services and back-office support areas, are analyzed, pooled by process, and assigned to the appropriate reportable segment. The combination of direct revenue, direct expenses, funds transfer pricing, and allocations of non-interest expense, produces PPNR, which is the basis the segments are reviewed by executive management. Webster also allocates the provision for credit losses to each reportable segment based on management's estimate of the inherent loss content in each of the specific loan and lease portfolios. The ACL on loans and leases is included in total assets within the Corporate and Reconciling category. Merger-related expenses and strategic initiatives charges are also generally included in the Corporate and Reconciling category. The following tables present balance sheet information, including the appropriate allocations, for Webster's reportable segments and the Corporate and Reconciling category: At September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Goodwill $ 1,865,887 $ 57,779 $ 590,105 $ — $ 2,513,771 Total assets 40,907,410 122,112 10,120,063 17,902,981 69,052,566 At December 31, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Goodwill $ 131,000 $ 21,813 $ 385,560 $ — $ 538,373 Total assets 15,398,159 73,564 7,663,921 11,779,955 34,915,599 The following tables present results of operations, including the appropriate allocations, for Webster’s reportable segments and the Corporate and Reconciling category: Three months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 333,554 $ 58,567 $ 195,748 $ (36,866) $ 551,003 Non-interest income 40,497 25,842 33,842 13,455 113,636 Non-interest expense 102,415 36,725 109,588 81,343 330,071 Pre-tax, pre-provision net revenue 271,636 47,684 120,002 (104,754) 334,568 Provision (benefit) for credit losses 33,341 — (1,989) 5,179 36,531 Income (loss) before income taxes 238,295 47,684 121,991 (109,933) 298,037 Income tax expense (benefit) 59,574 12,779 31,718 (40,002) 64,069 Net income (loss) $ 178,721 $ 34,905 $ 90,273 $ (69,931) $ 233,968 Three months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 152,012 $ 42,074 $ 98,572 $ (62,967) $ 229,691 Non-interest income 22,782 24,756 24,292 11,945 83,775 Non-interest expense 50,244 32,374 73,212 24,407 180,237 Pre-tax, pre-provision net revenue 124,550 34,456 49,652 (75,429) 133,229 Provision (benefit) for credit losses 5,099 — 2,799 (148) 7,750 Income (loss) before income taxes 119,451 34,456 46,853 (75,281) 125,479 Income tax expense (benefit) 30,579 9,199 11,151 (21,163) 29,766 Net income (loss) $ 88,872 $ 25,257 $ 35,702 $ (54,118) $ 95,713 Nine months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 954,044 $ 152,702 $ 511,712 $ (186,547) $ 1,431,911 Non-interest income 128,670 79,352 92,541 38,041 338,604 Non-interest expense 294,375 110,674 312,464 330,570 $ 1,048,083 Pre-tax, pre-provision net revenue 788,339 $ 121,380 291,789 (479,076) 722,432 Provision (benefit) for credit losses 238,054 — (5,906) 5,471 237,619 Income (loss) before income tax expense 550,285 121,380 297,695 (484,547) 484,813 Income tax expense (benefit) 133,966 32,530 77,352 (158,567) 85,281 Net income (loss) $ 416,319 $ 88,850 $ 220,343 $ (325,980) $ 399,532 Nine months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 434,087 $ 126,376 $ 281,012 $ (167,168) $ 674,307 Non-interest income 59,536 78,315 71,262 24,121 233,234 Non-interest expense 142,803 100,802 222,672 88,970 555,247 Pre-tax, pre-provision net revenue 350,820 103,889 129,602 (232,017) 352,294 (Benefit) for credit losses (37,602) — (1,833) (65) (39,500) Income (loss) before income tax expense 388,422 103,889 131,435 (231,952) 391,794 Income tax expense (benefit) 99,436 27,738 31,282 (64,488) 93,968 Net income (loss) $ 288,986 $ 76,151 $ 100,153 $ (167,464) $ 297,826

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers The following tables summarize revenues recognized in accordance with ASC Topic 606, Revenue from Contracts with Customers. These disaggregated amounts, together with sources of other non-interest income that are subject to other GAAP topics, have been reconciled to non-interest income by reportable segment as presented within Note 16: Segment Reporting. Three months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 7,573 $ 24,008 $ 18,728 $ 498 $ 50,807 Loan and lease related fees (1) 5,623 — — — 5,623 Wealth and investment services 2,672 — 8,756 (9) 11,419 Other income — 1,834 413 — 2,247 Revenue from contracts with customers 15,868 25,842 27,897 489 70,096 Other sources of non-interest income 24,629 — 5,945 12,966 43,540 Total non-interest income $ 40,497 $ 25,842 $ 33,842 $ 13,455 $ 113,636 Three months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 4,206 $ 22,886 $ 13,079 $ 87 $ 40,258 Wealth and investment services 3,067 — 6,926 (8) 9,985 Other income — 1,870 626 — 2,496 Revenue from contracts with customers 7,273 24,756 20,631 79 52,739 Other sources of non-interest income 15,509 — 3,661 11,866 31,036 Total non-interest income $ 22,782 $ 24,756 $ 24,292 $ 11,945 $ 83,775 Nine months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 21,905 $ 74,091 $ 53,057 $ 966 $ 150,019 Loan and lease related fees (1) 16,198 — — — 16,198 Wealth and investment services 8,576 — 24,706 (22) 33,260 Other income — 5,261 1,083 — 6,344 Revenue from contracts with customers 46,679 79,352 78,846 944 205,821 Other sources of non-interest income 81,991 — 13,695 37,097 132,783 Total non-interest income $ 128,670 $ 79,352 $ 92,541 $ 38,041 $ 338,604 Nine months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 12,400 $ 72,382 $ 37,127 $ 257 $ 122,166 Wealth and investment services 9,029 — 20,472 (26) 29,475 Other income — 5,933 1,753 — 7,686 Revenue from contracts with customers 21,429 78,315 59,352 231 159,327 Other sources of non-interest income 38,107 — 11,910 23,890 73,907 Total non-interest income $ 59,536 $ 78,315 $ 71,262 $ 24,121 $ 233,234 (1) A portion of loan and lease related fees comprises income generated from factored receivables and payroll financing activities that is within the scope of ASC Topic 606. These revenue streams were new to Webster as of the first quarter of 2022 due to the businesses acquired in connection with the Sterling merger. Contracts with customers did not generate significant contract assets and liabilities at September 30, 2022 and Revenue Streams Deposit service fees consist of fees earned from customer deposit accounts, such as account maintenance fees, insufficient funds, and other transactional service charges. Performance obligations for account maintenance services are satisfied on a monthly basis at a fixed transaction price, whereas performance obligations for other deposit service charges resulting from various customer-initiated transactions are satisfied at a point-in-time when the service is rendered. Payment for deposit service fees is generally received immediately or in the following month through a direct charge to the customers' accounts. On occasion, Webster may waive certain fees for its customers. Fee waivers are recognized as a reduction to revenue in the period the waiver is granted to the customer. Due to the insignificance of the amounts waived, Webster does not reduce its transaction price to reflect any variable consideration. The deposit service fees revenue stream also includes interchange fees earned from debit and credit card transactions. The transaction price for interchange services is based on the transaction value and the interchange rate set by the card network. Performance obligations for interchange fees are satisfied at a point-in-time when the cardholders' transaction is authorized and settled. Payment for interchange fees is generally received immediately or in the following month. Factored receivables non-interest income consists of fees earned from accounts receivable management services. Webster factors accounts receivable, with and without recourse, for customers whereby the Company purchases their accounts receivable at a discount and assumes the risk, as applicable, and ownership of the assets through direct cash receipt from the end consumer. Factoring services are performed in exchange for a non-refundable fee at a transaction price based on a percentage of the gross invoice amount of each receivable purchased, subject to a minimum required amount. The performance obligation for factoring services is generally satisfied at a point-in-time when the receivable is assigned to Webster. However, should the commission earned not meet or exceed the minimum required annual amount, the difference between that and the actual amount is recognized at the end of the contract term. Other fees associated with factoring receivables may include wire transfer and technology fees, field examination fees, and Uniform Commercial Code fees, where the performance obligations are satisfied at a point-in-time when the services are rendered. Payment from the customer for factoring services is generally received immediately or within the following month. Payroll finance non-interest income consists of fees earned from performing payroll financing and business process outsourcing services, including full back-office technology and tax accounting services, along with payroll preparation, making payroll tax payments, invoice billings, and collections for independently-owned temporary staffing companies nationwide. Performance obligations for payroll finance and business processing activities are either satisfied upon completion of the support services or as payroll remittances are made on behalf of customers to fund their employee payroll, which generally occurs on a weekly basis. The agreed-upon transaction price is based on a fixed-percentage per the terms of the contract, which could be subject to a hold-back reserve to provide for any balances that are assessed to be at risk of collection. When Webster collects on amounts due from end consumers on behalf of its customers and at the time of financing payroll, the Company retains the agreed-upon transaction price payable for the performance of its services and remits an amount to the customer net of any advances and payroll tax withholdings, as applicable. Wealth and investment services consist of fees earned from asset management, trust administration, and investment advisory services, and through facilitating securities transactions. Performance obligations for asset management and trust administration services are satisfied on a monthly or quarterly basis at a transaction price based on a percentage of the period-end market value of the assets under administration. Payment for asset management and trust administration services is generally received a few days after period-end through a direct charge to the customers' accounts. Performance obligations for investment advisory services are satisfied over the period in which the services are provided through a time-based measurement of progress, and the agreed-upon transaction price with the customer varies depending on the nature of the services performed. Performance obligations for facilitating securities transactions are satisfied at a point-in-time when the securities are sold at a transaction price that is based on a percentage of the contract value. Payment for both investment advisory services and facilitating securities transactions may be received in advance of the service, but generally is received immediately or in the following period, in arrears.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Credit-Related Financial Instruments In the normal course of business, Webster offers financial instruments with off-balance sheet risk to meet the financing needs of its customers. These transactions include commitments to extend credit, standby letters of credit, and commercial letters of credit, which involve, to varying degrees, elements of credit risk. The following table summarizes the outstanding amounts of credit-related financial instruments with off-balance sheet risk: (In thousands) At September 30, At December 31, 2021 Commitments to extend credit $ 10,809,256 $ 6,870,095 Standby letters of credit 382,988 224,061 Commercial letters of credit 57,368 58,175 Total credit-related financial instruments with off-balance sheet risk $ 11,249,612 $ 7,152,331 Webster enters into contractual commitments to extend credit to its customers, such as revolving credit arrangements, term loan commitments, and short-term borrowing agreements, generally with fixed expiration dates or other termination clauses and that require payment of a fee. Substantially all of the Company's commitments to extend credit are contingent upon its customers maintaining specific credit standards at the time of loan funding, and are often secured by real estate collateral. Since the majority of the Company's commitments typically expire without being funded, the total contractual amount does not necessarily represent Webster's future payment requirements. Standby letters of credit are written conditional commitments issued by the Company to guarantee its customers' performance to a third party. In the event the customer does not perform in accordance with the terms of its agreement with a third-party, Webster would be required to fund the commitment. The contractual amount of each standby letter of credit represents the maximum amount of potential future payments the Company could be required to make. Historically, the majority of Webster's standby letters of credit expire without being funded. However, if the commitment were funded, the Company has recourse against the customer. Webster's standby letter of credit agreements are often secured by cash or other collateral. Commercial letters of credit are issued to finance either domestic or foreign customer trade arrangements. As a general rule, drafts are committed to be drawn when the goods underlying the transaction are in transit. Similar to standby letters of credit, Webster's commercial letter of credit agreements are often secured by the underlying goods subject to trade. An ACL is recorded within accrued expenses and other liabilities on the accompanying Condensed Consolidated Balance Sheets to provide for the unused portion of commitments to lend that are not unconditionally cancellable by Webster. Under the CECL methodology, the calculation of the allowance generally includes the probability of funding to occur and a corresponding estimate of expected lifetime credit losses on amounts assumed to be funded. Loss calculation factors are consistent with those for funded loans using PD and LGD applied to the underlying borrower's risk and facility grades, a draw down factor applied to utilization rates, relevant forecast information, and management's qualitative factors. The following table summarizes the activity in the ACL on unfunded loan commitments: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Balance, beginning of period $ 20,149 $ 11,974 $ 13,104 $ 12,755 ACL assumed from Sterling — — 6,749 — Provision (benefit) for credit losses 5,180 196 5,476 (585) Balance, end of period $ 25,329 $ 12,170 $ 25,329 $ 12,170 Litigation

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsThe Company has evaluated subsequent events from the date of the Condensed Consolidated Financial Statements and accompanying Notes thereto, through the date of issuance, and determined that no significant events were identified requiring recognition or disclosure.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements of Webster have been prepared in accordance with GAAP for interim financial information and Article 10 of Regulation S-X. Certain information and footnote disclosures required by GAAP for complete financial statements have been omitted or condensed. Therefore, the condensed consolidated financial statements should be read in conjunction with Webster's Annual Report on Form 10-K for the year ended December 31, 2021. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the future results that may be attained for the entire year or other interim periods. In the opinion of management, all necessary adjustments have been reflected to present fairly the financial position, results of operations, and cash flows for the reporting periods presented. Intercompany transactions and balances have been eliminated in consolidation. Assets under administration or assets under management that Webster holds or manages in a fiduciary or agency capacity for customers are not included in the consolidated financial statements.
Reclassifications	ReclassificationsCertain prior period amounts have been reclassified to conform to the current period presentation. These reclassifications did not have a significant impact on the Company's consolidated financial statements.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Business Combinations	Business Combinations Business combinations are accounted for under the acquisition method, in which the identifiable assets acquired and liabilities assumed are generally measured and recognized at fair value as of the acquisition date, with the excess of the purchase price over the fair value of the net assets acquired recognized as goodwill. Items such as acquired ROU lease assets and operating lease liabilities as lessee, employee benefit plans, and income-tax related balances are recognized in accordance with other applicable GAAP, which may result in measurements that differ from fair value. Business combinations are included in the consolidated financial statements from the respective dates of acquisition. Historical reporting periods reflect only the results of legacy Webster operations. Merger-related costs are expensed in the period incurred and presented within the applicable non-interest expense category. Additional information regarding Webster's mergers and acquisitions can be found within
Purchased Credit-Deteriorated Loans and Leases	Purchased Credit-Deteriorated Loans and Leases Purchased credit-deteriorated (PCD) loans and leases are defined as those that have experienced a more-than-insignificant deterioration in credit quality since origination. Webster considers a variety of factors to evaluate and identify whether acquired loans are PCD, including but not limited to, nonaccrual status, delinquency, TDR classification, partial charge-offs, decreases in FICO scores, risk rating downgrades, and other factors. Upon acquisition, expected credit losses are added to the fair value of individual PCD loans and leases to determine the amortized cost basis. After initial recognition, any changes to the estimate of expected credit losses, favorable or unfavorable, are recorded as a provision for credit loss during the period of change. PCD accounting is also applied to loans and leases previously charged-off by the acquiree if Webster has contractual rights to the cash flows at the acquisition date. Webster recognizes an additional ACL for amounts previously charged-off by the acquiree with a corresponding increase to the amortized costs basis of the acquired asset. Balances deemed to be uncollectible are immediately charged-off in accordance with Webster’s charge-off policies, resulting in the establishment of the initial ACL for PCD loans and leases to be recorded net of these uncollectible balances.
Relevant Accounting Standards Issued But Not Yet Adopted	Relevant Accounting Standards Issued But Not Yet Adopted ASU No. 2022-02—Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures In March 2022, the Financial Accounting Standards Board (FASB) issued ASU No. 2022-02, which eliminates the accounting guidance for TDRs by creditors in Subtopic 310-40, Receivables—Troubled Debt Restructurings by Creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance in paragraphs 310-20-35-9 through 35-11 to determine whether a modification results in a new loan or a continuation of an existing loan. In addition, ASU No. 2022-02 requires that an entity disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost in the vintage disclosures required by paragraph 326-20-50-6. ASU No. 2022-02 is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years, with early adoption permitted. The amendments should be applied prospectively, however, an entity has the option to apply a modified retrospective transition method related to the recognition and measurement of TDRs, which would result in a cumulative-effect adjustment to retained earnings in the period of adoption. Webster is currently evaluating the impact of adoption on the Company's consolidated financial statements and disclosures. ASU No. 2022-03—Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to 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 that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security, and therefore, is not considered in measuring fair value. The amendments also clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction, and require the following disclosures for equity securities subject to contractual sale restrictions: (i) the fair value of equity securities subject to contractual sale restrictions reflected on the balance sheet; (ii) the nature and remaining duration of the restriction(s); and (iii) the circumstances that could cause a lapse in the restriction(s). ASU No. 2022-03 is effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years, with early adoption permitted. For all entities except investment companies, the amendments should be applied prospectively with any adjustments from the adoption of the amendments recognized in earnings and disclosed on the date of adoption. Webster is currently evaluating the impact of adoption on the Company's consolidated financial statements and disclosures.

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Summary of Purchase Price Consideration	The following table summarizes the determination of the purchase price consideration: (In thousands, except share and price per share data) Webster common stock issued 87,965,239 Price per share of Webster common stock on January 31, 2022 $ 56.81 Consideration for outstanding common stock 4,997,305 Consideration for preferred stock exchanged 138,942 Consideration for replacement equity awards (1) 43,877 Cash in lieu of fractional shares 176 Total purchase price consideration $ 5,180,300 (1) The fair value of the replacement equity awards issued by Webster and included in the consideration transferred pertain to services performed prior to the merger effective date. The fair value attributed to services performed after the merger effective date will be recognized over the required service vesting period for each award and recorded as compensation and benefits expense on the consolidated statements of income. Webster recognized an incremental $2.6 million and $16.4 million of stock compensation expense related to the replacement equity awards during the three and nine months ended September 30, 2022, respectively.
Summary of Purchase Price Allocation	The following table summarizes the preliminary allocation of the purchase price to the fair value of the identifiable assets acquired and liabilities assumed from Sterling at January 31, 2022: (In thousands) Unpaid Principal Balance Fair Value Purchase price consideration $ 5,180,300 Assets: Cash and due from banks 510,929 Interest-bearing deposits 3,207 Investment securities available-for-sale 4,429,948 Federal Home Loan Bank and Federal Reserve Bank Stock 150,502 Loans held for sale 23,517 Loans and leases: Commercial non-mortgage $ 5,570,782 5,527,657 Asset-based 694,137 683,958 Commercial real estate 6,790,600 6,656,405 Multi-family 4,303,381 4,255,906 Equipment financing 1,350,579 1,314,311 Warehouse lending 647,767 643,754 Residential 1,313,785 1,281,637 Home equity 132,758 122,553 Other consumer 12,559 12,525 Total loans and leases $ 20,816,348 20,498,706 Deferred tax assets, net (52,130) Premises and equipment (1) 264,421 Other intangible assets 210,100 Bank-owned life insurance policies 645,510 Accrued interest receivable and other assets 959,501 Total assets acquired $ 27,644,211 Liabilities: Non-interest-bearing deposits $ 6,620,248 Interest-bearing deposits 16,643,755 Securities sold under agreements to repurchase and other borrowings 27,184 Long-term debt 516,881 Accrued expenses and other liabilities (1) 595,275 Total liabilities assumed $ 24,403,343 Net assets acquired 3,240,868 Goodwill $ 1,939,432 (1) Includes $100.0 million of ROU lease assets operating lease liabilities
Schedule of PCD Loans and Leases by Portfolio Segment	The following table reconciles the unpaid principal balance to the fair value of PCD loans and leases by portfolio segment: (In thousands) Commercial Consumer Total Unpaid principal balance $ 3,394,963 $ 541,471 $ 3,936,434 ACL at acquisition (115,464) (20,852) (136,316) Non-credit (discount) (40,947) (2,784) (43,731) Fair value 3,238,552 517,835 3,756,387
Summary of Supplemental Pro Forma Information	The following table summarizes supplemental pro forma financial information giving effect to the merger as if it had been completed on January 1, 2021: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Net interest income $ 538,125 $ 440,300 $ 1,436,867 $ 1,344,827 Non-interest income 113,636 120,961 349,405 347,928 Net income 239,569 181,980 636,174 368,051
Summary of Supplemental Pro Forma Information Adjustments	In addition, the supplemental pro forma financial information was adjusted for merger-related expenses, as follows: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Compensation and benefits (1) $ 5,770 $ 7,731 $ 71,472 $ 8,197 Occupancy (2) 4,389 — 35,744 — Technology and equipment (3) 1,478 33 21,375 33 Professional and outside services (4) 10,792 2,028 59,073 18,315 Marketing 64 — 199 — Other expense (5) 3,043 55 12,808 349 Total merger-related expenses $ 25,536 $ 9,847 $ 200,671 $ 26,894 (1) Comprised primarily of severance and employee retention costs, and executive synergy stock awards. (2) Comprised primarily of charges associated with Webster’s corporate real estate consolidation strategy, which was developed and launched in the second quarter of 2022. Under the consolidation plan, Webster has arranged to close 14 locations in order to reduce the Company's corporate real estate facility square footage by approximately 45% by the end of the year. During the three and nine months ended September 30, 2022, respectively, the Company recognized a combined $4.3 million and $12.0 million in related exit costs and accelerated depreciation on property and equipment. The amount for the nine months ended September 30, 2022 also includes $23.1 million in ROU asset impairment charges, which were calculated as the difference between the estimated fair value of the assets determined using a discounted cash flow technique, relative to their book value. (3) Comprised primarily of technology contract termination fees. (4) Comprised primarily of advisory, legal, accounting, and other professional fees. (5) Comprised primarily of disposals on property and equipment, transfer tax, and other miscellaneous expenses.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-sale	The following tables summarize the amortized cost and fair value of available-for-sale debt securities by major type: At September 30, 2022 (In thousands) Amortized Unrealized Unrealized Fair Value (1) U.S. Treasury notes $ 755,414 $ — $ (42,151) $ 713,263 Government agency debentures 311,982 — (42,954) 269,028 Municipal bonds and notes 1,842,985 — (145,840) 1,697,145 Agency CMO 68,886 — (5,025) 63,861 Agency MBS 2,533,669 21 (336,341) 2,197,349 Agency CMBS 1,697,243 — (241,324) 1,455,919 CMBS 949,535 — (26,607) 922,928 CLO 7,219 — (16) 7,203 Corporate debt 797,931 — (95,759) 702,172 Private label MBS 49,408 — (5,098) 44,310 Other 12,532 — (666) 11,866 Available-for-sale debt securities $ 9,026,804 $ 21 $ (941,781) $ 8,085,044 At December 31, 2021 (In thousands) Amortized Unrealized Unrealized Fair Value (1) U.S. Treasury notes $ 398,664 $ — $ (1,698) $ 396,966 Agency CMO 88,109 2,326 (51) 90,384 Agency MBS 1,568,293 36,130 (11,020) 1,593,403 Agency CMBS 1,248,548 2,537 (18,544) 1,232,541 CMBS 887,640 506 (1,883) 886,263 CLO 21,860 — (13) 21,847 Corporate debt 14,583 — (1,133) 13,450 Available-for-sale debt securities $ 4,227,697 $ 41,499 $ (34,342) $ 4,234,854 (1) Fair value represents net carrying value. No ACL has been recorded on available-for-sale debt securities at September 30, 2022 and December 31, 2021, as the securities held are high credit quality and investment grade. The following table summarizes available-for-sale debt securities pledged for deposits, borrowings, and other purposes: (In thousands) At September 30, 2022 At December 31, 2021 Available-for-sale debt securities pledged for deposits, at fair value $ 3,678,364 $ 855,323 Available-for-sale debt securities pledged for borrowings and other, at fair value 1,282,501 924,841 Total available-for-sale debt securities pledged $ 4,960,865 $ 1,780,164
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value	The following tables summarize the gross unrealized losses and fair value of available-for-sale debt securities by length of time each major security type has been in a continuous unrealized loss position: At September 30, 2022 Less Than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized Number of Fair Unrealized U.S. Treasury notes $ 713,263 $ (42,151) $ — $ — 23 $ 713,263 $ (42,151) Government agency debentures 269,028 (42,954) — — 20 269,028 (42,954) Municipal bonds and notes 1,696,419 (145,840) — — 499 1,696,419 (145,840) Agency CMO 62,951 (5,013) 910 (12) 39 63,861 (5,025) Agency MBS 1,794,195 (252,060) 401,864 (84,281) 460 2,196,059 (336,341) Agency CMBS 991,740 (154,725) 464,179 (86,599) 132 1,455,919 (241,324) CMBS 534,261 (14,954) 388,667 (11,653) 53 922,928 (26,607) CLO — — 7,203 (16) 1 7,203 (16) Corporate debt 693,493 (94,125) 8,679 (1,634) 106 702,172 (95,759) Private label MBS 44,310 (5,098) — — 3 44,310 (5,098) Other 11,866 (666) — — 4 11,866 (666) Available-for-sale debt securities in unrealized loss position $ 6,811,526 $ (757,586) $ 1,271,502 $ (184,195) 1,340 $ 8,083,028 $ (941,781) At December 31, 2021 Less Than Twelve Months Twelve Months or Longer Total (Dollars in thousands) Fair Unrealized Fair Unrealized Number of Fair Unrealized U.S. Treasury notes $ 396,966 $ (1,698) $ — $ — 8 $ 396,966 $ (1,698) Agency CMO 7,895 (51) — — 2 7,895 (51) Agency MBS 506,602 (7,354) 110,687 (3,666) 70 617,289 (11,020) Agency CMBS 632,213 (6,163) 335,480 (12,381) 28 967,693 (18,544) CMBS 724,762 (1,744) 81,253 (139) 50 806,015 (1,883) CLO — — 21,848 (13) 1 21,848 (13) Corporate debt 4,203 (76) 9,247 (1,057) 3 13,450 (1,133) Available-for-sale debt securities in unrealized loss position $ 2,272,641 $ (17,086) $ 558,515 $ (17,256) 162 $ 2,831,156 $ (34,342)
Summary of Debt Securities by Contractual Maturity	The following table summarizes the amortized cost and fair value of available-for-sale debt securities by contractual maturity: At September 30, 2022 (In thousands) Amortized Cost Fair Value Due in one year or less $ 59,790 $ 58,824 Due after one year through five years 1,452,511 1,361,398 Due after five through ten years 1,437,643 1,306,402 Due after ten years 6,076,860 5,358,420 Total available-for-sale debt securities $ 9,026,804 $ 8,085,044 The following table summarizes the amortized cost and fair value of held-to-maturity debt securities by contractual maturity: At September 30, 2022 (In thousands) Amortized Cost Fair Value Due in one year or less $ 2,158 $ 2,155 Due after one year through five years 52,383 52,315 Due after five years through ten years 334,065 312,347 Due after ten years 6,117,441 5,283,302 Total held-to-maturity debt securities $ 6,506,047 $ 5,650,119
Debt Securities, Held-to-maturity	The following tables summarize the amortized cost, fair value, and ACL on held-to-maturity debt securities by major type: At September 30, 2022 (In thousands) Amortized Unrealized Unrealized Fair Value Allowance Net Carrying Value Agency CMO $ 29,854 $ — $ (2,063) $ 27,791 $ — $ 29,854 Agency MBS 2,701,984 674 (379,332) 2,323,326 — 2,701,984 Agency CMBS 2,691,955 — (372,838) 2,319,117 — 2,691,955 Municipal bonds and notes 930,390 208 (92,284) 838,314 209 930,181 CMBS 151,864 — (10,293) 141,571 — 151,864 Held-to-maturity debt securities $ 6,506,047 $ 882 $ (856,810) $ 5,650,119 $ 209 $ 6,505,838 At December 31, 2021 (In thousands) Amortized Unrealized Unrealized Fair Value Allowance Net Carrying Value Agency CMO $ 42,405 $ 655 $ (25) $ 43,035 $ — $ 42,405 Agency MBS 2,901,593 71,444 (11,788) 2,961,249 — 2,901,593 Agency CMBS 2,378,475 11,202 (43,844) 2,345,833 — 2,378,475 Municipal bonds and notes 705,918 51,572 — 757,490 214 705,704 CMBS 169,948 3,381 — 173,329 — 169,948 Held-to-maturity debt securities $ 6,198,339 $ 138,254 $ (55,657) $ 6,280,936 $ 214 $ 6,198,125 The following table summarizes the activity in the ACL on held-to-maturity debt securities: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Balance, beginning of period $ 210 $ 382 $ 214 $ 299 (Benefit) for credit losses (1) (148) (5) (65) Balance, end of period $ 209 $ 234 $ 209 $ 234 The following tables summarize the amortized cost basis of held-to-maturity debt securities based on their lowest publicly available credit rating: September 30, 2022 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMO $ — $ 29,854 $ — $ — $ — $ — $ — $ — $ — Agency MBS — 2,701,984 — — — — — — — Agency CMBS — 2,691,955 — — — — — — — Municipal bonds and notes 336,528 163,482 255,616 117,095 38,349 4,165 — 95 15,060 CMBS 151,864 — — — — — — — — Held-to-maturity debt securities $ 488,392 $ 5,587,275 $ 255,616 $ 117,095 $ 38,349 $ 4,165 $ — $ 95 $ 15,060 December 31, 2021 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMO $ — $ 42,405 $ — $ — $ — $ — $ — $ — $ — Agency MBS — 2,901,593 — — — — — — — Agency CMBS — 2,378,475 — — — — — — — Municipal bonds and notes 207,426 119,804 227,106 104,232 35,878 8,260 — 95 3,117 CMBS 169,948 — — — — — — — — Held-to-maturity debt securities $ 377,374 $ 5,442,277 $ 227,106 $ 104,232 $ 35,878 $ 8,260 $ — $ 95 $ 3,117 The following table summarizes held-to-maturity debt securities pledged for deposits, borrowings, and other purposes: (In thousands) At September 30, 2022 At December 31, 2021 Held-to-maturity debt securities pledged for deposits, at amortized cost $ 2,026,305 $ 1,834,117 Held-to-maturity debt securities pledged for borrowings and other, at amortized cost 269,920 1,243,139 Total held-to-maturity debt securities pledged $ 2,296,225 $ 3,077,256

Loans and Leases (Tables)

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2022
Loans and Leases Receivable Disclosure [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	The following table summarizes loans and leases by portfolio segment and class: (In thousands) At September 30, At December 31, 2021 Commercial non-mortgage $ 15,148,507 $ 6,882,480 Asset-based 1,803,719 1,067,248 Commercial real estate 12,742,888 5,463,321 Multi-family 6,119,731 1,139,859 Equipment financing 1,764,289 627,058 Warehouse lending 894,438 — Commercial portfolio 38,473,572 15,179,966 Residential 7,617,955 5,412,905 Home equity 1,662,756 1,593,559 Other consumer 69,592 85,299 Consumer portfolio 9,350,303 7,091,763 Loans and leases $ 47,823,875 $ 22,271,729
Past Due Financing Receivables	The following tables summarize the aging of accrual and non-accrual loans and leases by class: At September 30, 2022 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total Past Due and Non-accrual Current Total Loans Commercial non-mortgage $ 12,270 $ 3,958 $ 703 $ 61,598 $ 78,529 $ 15,069,978 $ 15,148,507 Asset-based — — — 25,093 25,093 1,778,626 1,803,719 Commercial real estate 5,172 134 — 41,961 47,267 12,695,621 12,742,888 Multi-family 677 86 — 1,972 2,735 6,116,996 6,119,731 Equipment financing 3,261 1,358 — 13,328 17,947 1,746,342 1,764,289 Warehouse lending — — — — — 894,438 894,438 Commercial portfolio 21,380 5,536 703 143,952 171,571 38,302,001 38,473,572 Residential 8,969 3,527 — 25,309 37,805 7,580,150 7,617,955 Home equity 4,083 1,157 — 30,700 35,940 1,626,816 1,662,756 Other consumer 321 169 — 272 762 68,830 69,592 Consumer portfolio 13,373 4,853 — 56,281 74,507 9,275,796 9,350,303 Total $ 34,753 $ 10,389 $ 703 $ 200,233 $ 246,078 $ 47,577,797 $ 47,823,875 At December 31, 2021 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total Past Due and Non-accrual Current Total Loans Commercial non-mortgage $ 3,729 $ 4,524 $ 1,977 $ 59,607 $ 69,837 $ 6,812,643 $ 6,882,480 Asset-based — — — 2,086 2,086 1,065,162 1,067,248 Commercial real estate 508 417 519 5,046 6,490 5,456,831 5,463,321 Multi-family — — — — — 1,139,859 1,139,859 Equipment financing 1,034 — — 3,728 4,762 622,296 627,058 Commercial portfolio 5,271 4,941 2,496 70,467 83,175 15,096,791 15,179,966 Residential 3,212 368 — 15,747 19,327 5,393,578 5,412,905 Home equity 3,467 1,600 — 23,489 28,556 1,565,003 1,593,559 Other consumer 379 181 — 224 784 84,515 85,299 Consumer portfolio 7,058 2,149 — 39,460 48,667 7,043,096 7,091,763 Total $ 12,329 $ 7,090 $ 2,496 $ 109,927 $ 131,842 $ 22,139,887 $ 22,271,729
Financing Receivable, Nonaccrual	The following table provides additional information on non-accrual loans and leases: At September 30, 2022 At December 31, 2021 (In thousands) Non-accrual Non-accrual with No Allowance Non-accrual Non-accrual with No Allowance Commercial non-mortgage $ 61,598 $ 27,002 $ 59,607 $ 4,802 Asset-based 25,093 1,525 2,086 2,086 Commercial real estate 41,961 4,028 5,046 4,310 Multi-family 1,972 1,111 — — Equipment financing 13,328 1,955 3,728 — Commercial portfolio 143,952 35,621 70,467 11,198 Residential 25,309 9,540 15,747 10,584 Home equity 30,700 17,416 23,489 18,920 Other consumer 272 3 224 2 Consumer portfolio 56,281 26,959 39,460 29,506 Total $ 200,233 $ 62,580 $ 109,927 $ 40,704
Activity In Allowance For Losses	The following tables summarize the change in the ACL on loans and leases by portfolio segment: At or for the three months ended September 30, 2022 2021 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Balance, beginning of period $ 511,745 $ 59,754 $ 571,499 $ 263,071 $ 44,874 $ 307,945 Provision (benefit) 34,513 (3,161) 31,352 7,681 217 7,898 Charge-offs (31,356) (1,453) (32,809) (1,723) (2,053) (3,776) Recoveries 1,413 2,870 4,283 142 2,713 2,855 Balance, end of period $ 516,315 $ 58,010 $ 574,325 $ 269,171 $ 45,751 $ 314,922 At or for the nine months ended September 30, 2022 2021 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Balance, beginning of period $ 257,877 $ 43,310 $ 301,187 $ 312,244 $ 47,187 $ 359,431 Initial allowance for PCD loans and leases (1) 78,376 9,669 88,045 — — — Provision (benefit) 230,881 1,267 232,148 (37,049) (2,386) (39,435) Charge-offs (61,361) (3,469) (64,830) (8,638) (7,835) (16,473) Recoveries 10,542 7,233 17,775 2,614 8,785 11,399 Balance, end of period $ 516,315 $ 58,010 $ 574,325 $ 269,171 $ 45,751 $ 314,922 Individually evaluated for impairment 36,394 13,278 49,672 7,791 4,308 12,099 Collectively evaluated for impairment $ 479,921 $ 44,732 $ 524,653 $ 261,380 $ 41,443 $ 302,823 (1) Represents the establishment of the initial reserve for PCD loans and leases, which is reported net of $48.3 million of day one charge-offs recognized at the date of acquisition in accordance with GAAP. The following table summarizes the activity in the ACL on unfunded loan commitments: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Balance, beginning of period $ 20,149 $ 11,974 $ 13,104 $ 12,755 ACL assumed from Sterling — — 6,749 — Provision (benefit) for credit losses 5,180 196 5,476 (585) Balance, end of period $ 25,329 $ 12,170 $ 25,329 $ 12,170
Financing Receivable Credit Quality Indicators	The following tables summarize the amortized cost basis of commercial loans and leases by Composite Credit Risk Profile grade and origination year: At September 30, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total Commercial non-mortgage: Pass $ 4,106,108 $ 2,132,870 $ 1,120,386 $ 883,826 $ 685,660 $ 890,405 $ 4,906,060 $ 14,725,315 Special mention 73,417 13,288 — 310 1,118 14,781 43,220 146,134 Substandard 25,231 1,442 72,161 38,086 71,694 18,809 46,113 273,536 Doubtful — 4 — — — — 3,518 3,522 Commercial non-mortgage 4,204,756 2,147,604 1,192,547 922,222 758,472 923,995 4,998,911 15,148,507 Asset-based: Pass 8,072 7,610 16,883 15,729 14,561 56,370 1,563,434 1,682,659 Special mention — — — — — — 40,279 40,279 Substandard — — 10,017 1,525 — — 69,239 80,781 Asset-based 8,072 7,610 26,900 17,254 14,561 56,370 1,672,952 1,803,719 Commercial real estate: Pass 2,428,963 2,248,840 1,760,942 1,803,958 1,128,337 2,873,117 107,178 12,351,335 Special mention 21,974 8,267 33,548 22,300 91,283 60,346 — 237,718 Substandard — 1,502 8,904 29,282 24,376 89,736 — 153,800 Doubtful — — — 1 — 34 — 35 Commercial real estate 2,450,937 2,258,609 1,803,394 1,855,541 1,243,996 3,023,233 107,178 12,742,888 Multi-family: Pass 1,309,097 1,123,973 453,324 698,885 489,177 1,843,835 68,623 5,986,914 Special mention — 37,668 — 95 40,506 9,915 9,276 97,460 Substandard — — 386 919 12,760 21,292 — 35,357 Multi-family 1,309,097 1,161,641 453,710 699,899 542,443 1,875,042 77,899 6,119,731 Equipment financing: Pass 328,553 382,901 378,176 364,598 127,688 126,879 — 1,708,795 Special mention — 195 573 1,691 6,826 1,128 — 10,413 Substandard 481 5,854 18,694 5,758 5,884 8,410 — 45,081 Equipment financing 329,034 388,950 397,443 372,047 140,398 136,417 — 1,764,289 Warehouse lending: Pass — — — — — — 894,438 894,438 Warehouse lending — — — — — — 894,438 894,438 Commercial portfolio $ 8,301,896 $ 5,964,414 $ 3,873,994 $ 3,866,963 $ 2,699,870 $ 6,015,057 $ 7,751,378 $ 38,473,572 At December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total Commercial non-mortgage: Pass $ 2,270,320 $ 1,179,620 $ 757,343 $ 581,633 $ 292,637 $ 275,789 $ 1,182,562 $ 6,539,904 Special mention 14,216 22,892 37,877 15,575 9,721 15,399 27,808 143,488 Substandard 3,660 46,887 30,437 69,963 5,255 19,483 23,403 199,088 Commercial non-mortgage 2,288,196 1,249,399 825,657 667,171 307,613 310,671 1,233,773 6,882,480 Asset-based: Pass 7,609 19,141 12,810 13,456 6,113 25,850 920,496 1,005,475 Special mention — — — 675 — — 59,012 59,687 Substandard — — 2,086 — — — — 2,086 Asset-based 7,609 19,141 14,896 14,131 6,113 25,850 979,508 1,067,248 Commercial real estate: Pass 1,152,431 733,220 1,146,149 594,180 384,664 1,136,384 55,044 5,202,072 Special mention 95 3,084 — 84,475 51,536 79,096 — 218,286 Substandard — 82 227 373 13,874 28,407 — 42,963 Commercial real estate 1,152,526 736,386 1,146,376 679,028 450,074 1,243,887 55,044 5,463,321 Multi-family: Pass 222,875 135,924 185,087 322,688 17,054 203,558 566 1,087,752 Special mention — — — 35,201 — — — 35,201 Substandard — 400 — 6,933 — 9,573 — 16,906 Multi-family 222,875 136,324 185,087 364,822 17,054 213,131 566 1,139,859 Equipment financing: Pass 231,762 188,031 93,547 41,276 14,864 32,588 — 602,068 Special mention — 108 2,229 3,341 — 600 — 6,278 Substandard — 8,388 4,756 2,612 332 2,624 — 18,712 Equipment financing 231,762 196,527 100,532 47,229 15,196 35,812 — 627,058 Commercial portfolio $ 3,902,968 $ 2,337,777 $ 2,272,548 $ 1,772,381 $ 796,050 $ 1,829,351 $ 2,268,891 $ 15,179,966 To measure credit risk for the consumer portfolio, the most relevant credit characteristic is the FICO score, which is a widely used credit scoring system that ranges from 300 to 850. A lower FICO score is indicative of higher credit risk and a higher FICO score is indicative of lower credit risk. FICO scores are updated at least on a quarterly basis. The following tables summarize the amortized cost basis of consumer loans by FICO score and origination year: At September 30, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total Residential: 800+ $ 334,705 $ 911,161 $ 449,160 $ 161,434 $ 33,136 $ 1,006,403 $ — $ 2,895,999 740-799 786,495 1,008,396 336,307 119,615 39,329 769,948 — 3,060,090 670-739 308,253 359,002 115,708 59,946 18,853 407,928 — 1,269,690 580-669 32,779 44,896 14,772 8,598 3,283 150,773 — 255,101 579 and below 10,329 4,800 1,401 60,694 1,453 58,398 — 137,075 Residential 1,472,561 2,328,255 917,348 410,287 96,054 2,393,450 — 7,617,955 Home equity: 800+ 19,190 34,258 27,296 8,379 12,193 55,519 482,328 639,163 740-799 21,246 37,099 18,237 7,772 10,382 36,451 417,840 549,027 670-739 13,616 18,679 8,092 3,693 7,218 33,343 256,835 341,476 580-669 2,016 2,832 1,383 1,616 1,114 13,264 75,542 97,767 579 and below 443 390 659 590 707 5,047 27,487 35,323 Home equity 56,511 93,258 55,667 22,050 31,614 143,624 1,260,032 1,662,756 Other consumer: 800+ 363 246 783 1,229 425 108 21,121 24,275 740-799 646 2,761 2,544 3,227 1,287 889 10,816 22,170 670-739 820 770 3,404 5,281 1,535 281 5,321 17,412 580-669 169 211 424 1,019 263 72 1,560 3,718 579 and below 54 116 110 200 62 31 1,444 2,017 Other consumer 2,052 4,104 7,265 10,956 3,572 1,381 40,262 69,592 Consumer portfolio $ 1,531,124 $ 2,425,617 $ 980,280 $ 443,293 $ 131,240 $ 2,538,455 $ 1,300,294 $ 9,350,303 At December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total Residential: 800+ $ 590,238 $ 428,118 $ 161,664 $ 35,502 $ 105,198 $ 735,517 $ — $ 2,056,237 740-799 1,083,608 421,380 154,960 32,172 95,662 456,722 — 2,244,504 670-739 374,460 135,146 73,499 25,099 34,550 227,863 — 870,617 580-669 38,644 13,782 9,348 3,056 9,000 71,811 — 145,641 579 and below 9,478 1,051 49,252 390 2,519 33,216 — 95,906 Residential 2,096,428 999,477 448,723 96,219 246,929 1,525,129 — 5,412,905 Home equity: 800+ 35,678 30,157 9,591 16,347 11,068 58,189 463,334 624,364 740-799 42,430 22,030 9,413 13,317 7,711 33,777 409,518 538,196 670-739 17,493 9,162 5,889 8,220 5,802 31,160 233,744 311,470 580-669 1,773 1,397 1,298 1,066 1,329 15,042 66,361 88,266 579 and below 380 446 725 1,060 434 5,666 22,552 31,263 Home equity 97,754 63,192 26,916 40,010 26,344 143,834 1,195,509 1,593,559 Other consumer: 800+ 463 1,343 2,398 916 231 118 10,160 15,629 740-799 2,588 5,408 8,303 2,985 379 77 9,528 29,268 670-739 1,061 7,034 13,602 3,859 607 412 5,644 32,219 580-669 256 1,083 2,550 735 216 211 1,267 6,318 579 and below 147 87 215 159 40 21 1,196 1,865 Other consumer 4,515 14,955 27,068 8,654 1,473 839 27,795 85,299 Consumer portfolio $ 2,198,697 $ 1,077,624 $ 502,707 $ 144,883 $ 274,746 $ 1,669,802 $ 1,223,304 $ 7,091,763
Troubled Debt Restructurings on Financing Receivables	The following table summarizes information related to TDRs: (In thousands) At September 30, At December 31, 2021 Accrual status $ 105,703 $ 110,625 Non-accrual status 65,041 52,719 Total TDRs $ 170,744 $ 163,344 Additional funds committed to borrowers in TDR status $ 1,193 $ 5,975 Specific reserves for TDRs included in the ACL on loans and leases: Commercial portfolio $ 7,274 $ 9,017 Consumer portfolio 3,863 3,745 The following table summarizes loans and leases modified as TDRs by class and modification type: Three months ended September 30, Nine months ended September 30, 2022 2021 2022 2021 (Dollars in thousands) Number of Recorded Investment (1) Number of Recorded Investment (1) Number of Recorded Investment (1) Number of Recorded Investment (1) Commercial non-mortgage Extended maturity 1 $ 24 1 $ 48 3 $ 121 8 $ 605 Maturity/rate combined 3 322 2 94 8 765 8 304 Other (2) 15 17,408 — — 16 40,372 3 114 Commercial real estate Extended maturity — — — — — — 1 183 Equipment financing Other (2) — — — — 1 1,157 — — Residential Extended maturity — — — — 1 893 1 99 Maturity/rate combined 1 124 — — 1 124 2 401 Other (2) 1 298 — — 7 3,060 2 233 Home equity Extended maturity — — — — — — 1 28 Adjusted interest rate — — — — 1 74 — — Maturity/rate combined 3 1,515 — — 14 2,239 6 1,025 Other (2) 6 444 3 153 30 1,777 17 1,121 Total TDRs 30 $ 20,135 6 $ 295 82 $ 50,582 49 $ 4,113 (1) Post-modification balances approximate pre-modification balances. The aggregate amount of charge-offs due to restructurings was not significant. (2) Other includes covenant modifications, forbearance, discharges under Chapter 7 bankruptcy, or other concessions.

Transfers and Servicing of Fi_2

Transfers and Servicing of Financial Assets (Tables)	9 Months Ended
	Sep. 30, 2022
Transfers and Servicing [Abstract]
Transfer of Financial Assets Accounted for as Sales	The following table summarizes information related to mortgage banking activities: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Net gain on sale $ 26 $ 1,063 $ 529 $ 4,523 Origination fees 22 313 194 1,231 Fair value adjustment 38 149 (107) (268) Mortgage banking activities $ 86 $ 1,525 $ 616 $ 5,486 Proceeds from sale $ 1,053 $ 52,256 $ 33,886 $ 199,991 Loans sold with servicing rights retained 147 50,643 30,464 192,421
Servicing Asset at Amortized Cost	The following table presents the change in the carrying amount for mortgage servicing assets: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Beginning balance $ 8,592 $ 11,501 $ 9,237 $ 13,422 Additions (1) 1,627 483 2,751 1,685 Amortization (2) (382) (1,363) (2,151) (4,295) Adjustment to valuation allowance — (454) — (645) Ending balance $ 9,837 $ 10,167 $ 9,837 $ 10,167 (1) In connection with the Sterling merger, Webster acquired $0.9 million of mortgage servicing assets on January 31, 2022.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table summarizes changes in the carrying amount of goodwill: (In thousands) At September 30, At December 31, Balance, beginning of period $ 538,373 $ 538,373 Sterling merger 1,939,432 — Bend acquisition 35,966 — Balance, end of period $ 2,513,771 $ 538,373
Schedule of Finite-Lived Intangible Assets	The following table summarizes other intangible assets: At September 30, 2022 At December 31, 2021 (In thousands) Gross Carrying Amount (1) Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Core deposits $ 145,725 $ 32,022 $ 113,703 $ 26,625 $ 18,516 $ 8,109 Customer relationships 115,000 21,434 93,566 21,000 11,240 9,760 Total other intangible assets $ 260,725 $ 53,456 $ 207,269 $ 47,625 $ 29,756 $ 17,869 (1) In connection with the Sterling merger and Bend acquisition, Webster recorded a $119.1 million core deposit intangible and $94.0 million of customer relationship intangibles, all of which are being amortized on an accelerated basis over a period of
Schedule Of Future Amortization expense	The remaining estimated aggregate future amortization expense for other intangible assets as of September 30, 2022 is as follows: (In thousands) Amortization Expense Remainder of 2022 $ 8,230 2023 30,315 2024 24,442 2025 21,455 2026 21,455 Thereafter 101,372

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2022
Deposit Liabilities [Abstract]
Deposit Liabilities, Type	The following table summarizes deposits by type: (In thousands) At September 30, At December 31, Non-interest-bearing: Demand $ 13,849,812 $ 7,060,488 Interest-bearing: Health savings accounts 7,889,310 7,397,582 Checking 9,203,220 4,182,497 Money market 11,156,579 3,718,953 Savings 9,340,372 5,689,739 Time deposits 2,569,594 1,797,770 Total interest-bearing $ 40,159,075 $ 22,786,541 Total deposits $ 54,008,887 $ 29,847,029 Time deposits, money market, and interest-bearing checking obtained through brokers $ 613,305 $ 120,392 Aggregate amount of time deposit accounts that exceeded the FDIC limit 551,132 256,522 Demand deposit overdrafts reclassified as loan balances 9,148 1,577
Time Deposit Maturities	The following table summarizes the scheduled maturities of time deposits: (In thousands) At September 30, Remainder of 2022 $ 827,351 2023 1,353,411 2024 161,239 2025 134,877 2026 59,115 Thereafter 33,601 Total time deposits $ 2,569,594

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Schedule of Repurchase Agreements	The following table summarizes securities sold under agreements to repurchase and other borrowings: At September 30, 2022 At December 31, 2021 (Dollars in thousands) Total Outstanding Rate Total Outstanding Rate Securities sold under agreements to repurchase (1) : Original maturity of one year or less $ 312,089 0.11 % $ 474,896 0.11 % Original maturity of greater than one year, non-callable (2) — — 200,000 1.32 Total securities sold under agreements to repurchase (1) 312,089 0.11 674,896 0.47 Federal funds purchased 953,325 3.17 — — Securities sold under agreements to repurchase and other borrowings $ 1,265,414 2.41 $ 674,896 0.47 (1) Webster has the right of offset with respect to all repurchase agreement assets and liabilities. Total securities sold under agreements to repurchase are presented as gross transactions, as only liabilities are outstanding for the periods presented. (2) During the three months September 30, 2022, Webster and its repurchase agreement counterparty agreed to fully extinguish two $100 million long-term, structured repurchase agreements. As a result, a net fee of $2.5 million was paid to Webster, which was recognized as a gain and recorded within other non-interest income on the Condensed Consolidated Statements of Operations.
Federal Home Loan Bank, Advances	The following table summarizes information for FHLB advances: At September 30, 2022 At December 31, 2021 (Dollars in thousands) Total Outstanding Weighted- Total Outstanding Weighted- Maturing within 1 year $ 3,500,145 3.03 % $ 90 — % After 1 but within 2 years 122 2.51 202 2.95 After 2 but within 3 years — — — — After 3 but within 4 years — — — — After 4 but within 5 years — — — — After 5 years 10,450 2.03 10,705 2.03 Total FHLB advances $ 3,510,717 3.03 $ 10,997 2.03 Aggregate carrying value of assets pledged as collateral $ 9,973,866 $ 7,556,034 Remaining borrowing capacity at FHLB 3,513,563 5,087,294
Schedule of Long-term Debt Instruments	The following table summarizes long-term debt: (Dollars in thousands) At September 30, At December 31, 4.375% Senior fixed-rate notes due February 15, 2024 $ 150,000 $ 150,000 4.100% Senior fixed-rate notes due March 25, 2029 (1) 334,796 338,811 4.000% Subordinated fixed-to-floating rate notes due December 30, 2029 274,000 — 3.875% Subordinated fixed-to-floating rate notes due November 1, 2030 225,000 — Junior subordinated debt Webster Statutory Trust I floating-rate notes due September 17, 2033 (2) 77,320 77,320 Total senior and subordinated debt 1,061,116 566,131 Discount on senior fixed-rate notes (811) (974) Debt issuance cost on senior fixed-rate notes (1,924) (2,226) Premium on subordinated fixed-to-floating rate notes 16,463 — Long-term debt $ 1,074,844 $ 562,931 (1) Webster de-designated its fair value hedging relationship on these senior notes in 2020. A basis adjustment of $34.8 million and $38.8 million at September 30, 2022 and December 31, 2021, respectively, is included in the carrying value and is being amortized over the remaining life of the senior notes. (2) The interest rate on the Webster Statutory Trust I floating-rate notes, which varies quarterly based on 3-month LIBOR plus 2.95%, was 6.48% and 3.17% at September 30, 2022 and December 31, 2021, respectively.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive (Loss) Income, Net of Tax (Tables)	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss by Component	The following tables summarize the changes in each component of accumulated other comprehensive (loss) income, net of tax: Three months ended September 30, 2022 Nine months ended September 30, 2022 (In thousands) Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Balance, beginning of period $ (445,616) $ (2,082) $ (33,634) $ (481,332) $ 4,536 $ 6,070 $ (33,186) $ (22,580) Other comprehensive (loss) before reclassifications (243,872) (14,416) (248) (258,536) (694,024) (24,099) (1,295) (719,418) Amounts reclassified from accumulated other comprehensive (loss) 1,641 717 609 2,967 1,641 2,248 1,208 5,097 Other comprehensive (loss) income, net of tax (242,231) (13,699) 361 (255,569) (692,383) (21,851) (87) (714,321) Balance, end of period $ (687,847) $ (15,781) $ (33,273) $ (736,901) $ (687,847) $ (15,781) $ (33,273) $ (736,901) Three months ended September 30, 2021 Nine months ended September 30, 2021 (In thousands) Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Securities Available For Sale Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Balance, beginning of period $ 35,598 $ 13,894 $ (43,602) $ 5,890 $ 67,424 $ 19,918 $ (45,086) $ 42,256 Other comprehensive (loss) before reclassifications (3,394) (2,560) — (5,954) (35,220) (10,205) — (45,425) Amounts reclassified from accumulated other comprehensive (loss) — 829 743 1,572 — 2,450 2,227 4,677 Other comprehensive (loss) income, net of tax (3,394) (1,731) 743 (4,382) (35,220) (7,755) 2,227 (40,748) Balance, end of period $ 32,204 $ 12,163 $ (42,859) $ 1,508 $ 32,204 $ 12,163 $ (42,859) $ 1,508
Schedule of Accumulated Other Comprehensive Loss	The following table further summarizes the amounts reclassified from accumulated other comprehensive (loss) income: Three months ended Nine months ended Associated Line Item on the Accumulated Other Comprehensive September 30, September 30, 2022 2021 2022 2021 (In thousands) Securities available-for-sale: Net realized (losses) $ (2,234) $ — $ (2,234) $ — (Loss) on sale of investment securities, net Tax benefit 593 — 593 — Income tax expense Net of tax $ (1,641) $ — $ (1,641) $ — Derivative instruments: Hedge terminations $ (76) $ (76) $ (229) $ (229) Interest expense Premium amortization (909) (1,046) (2,856) (3,088) Interest income Tax benefit 268 293 837 867 Income tax expense Net of tax $ (717) $ (829) $ (2,248) $ (2,450) Defined benefit pension and other Actuarial loss amortization $ (835) $ (1,008) $ (1,657) $ (3,023) Other non-interest expense Tax benefit 226 265 449 796 Income tax expense Net of tax $ (609) $ (743) $ (1,208) $ (2,227)

Regulatory Capital and Restri_2

Regulatory Capital and Restrictions (Tables)	9 Months Ended
	Sep. 30, 2022
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Information On The Capital Ratios	The following tables provides information on the capital ratios for Webster Financial Corporation and Webster Bank: At September 30, 2022 Actual (1) Minimum Requirement Well Capitalized (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Webster Financial Corporation CET1 risk-based capital $ 5,637,725 10.80 % $ 2,348,463 4.5 % $ 3,392,224 6.5 % Total risk-based capital 6,984,237 13.38 4,175,045 8.0 5,218,807 10.0 Tier 1 risk-based capital 5,921,704 11.35 3,131,284 6.0 4,175,045 8.0 Tier 1 leverage capital 5,921,704 8.98 2,637,840 4.0 3,297,301 5.0 Webster Bank CET1 risk-based capital $ 6,487,577 12.46 % $ 2,342,827 4.5 % $ 3,384,084 6.5 % Total risk-based capital 6,957,328 13.36 4,165,026 8.0 5,206,283 10.0 Tier 1 risk-based capital 6,487,577 12.46 3,123,770 6.0 4,165,026 8.0 Tier 1 leverage capital 6,487,577 9.85 2,634,102 4.0 3,292,628 5.0 At December 31, 2021 Actual (1) Minimum Requirement Well Capitalized (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Webster Financial Corporation CET1 risk-based capital $ 2,804,290 11.72 % $ 1,076,871 4.5 % $ 1,555,480 6.5 % Total risk-based capital 3,265,064 13.64 1,914,436 8.0 2,393,046 10.0 Tier 1 risk-based capital 2,949,327 12.32 1,435,827 6.0 1,914,436 8.0 Tier 1 leverage capital 2,949,327 8.47 1,393,607 4.0 1,742,008 5.0 Webster Bank CET1 risk-based capital $ 3,034,883 12.69 % $ 1,075,920 4.5 % $ 1,554,107 6.5 % Total risk-based capital 3,273,300 13.69 1,912,747 8.0 2,390,934 10.0 Tier 1 risk-based capital 3,034,883 12.69 1,434,560 6.0 1,912,747 8.0 Tier 1 leverage capital 3,034,883 8.72 1,392,821 4.0 1,741,026 5.0 (1) In accordance with regulatory capital rules, Webster elected an option to delay the estimated impact of the adoption of CECL on its regulatory capital over a two-year deferral period, which ended on January 1, 2022, and a subsequent three-year transition period ending on December 31, 2024. Therefore, the December 31, 2021 capital ratios and amounts exclude the impact of the increased ACL on loans and leases, held-to-maturity debt securities, and unfunded loan commitments related to the adoption of CECL on January 1, 2020, adjusted for an approximation of the after-tax provision for credit losses attributable to CECL relative to the incurred loss methodology during the deferral period. During the three year transition period, capital ratios will begin to phase out the aggregate amount of the capital benefit provided in the initial two years. For 2022, 2023, and 2024, Webster is allowed 75%, 50%, and 25% of the capital benefit as of December 31, 2021, respectively, with full absorption occurring in 2025.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of LIHTC Investments and Commitments	The following table summarizes Webster's LIHTC investments and related unfunded commitments: (In thousands) September 30, 2022 December 31, 2021 Gross investment in LIHTC (1) $ 707,619 $ 68,635 Accumulated amortization (56,887) (25,216) Net investment in LIHTC $ 650,732 $ 43,419 Unfunded commitments for LIHTC investments (1) $ 311,282 $ 11,106 (1) In connection with the Sterling merger, Webster acquired $515.6 million of LIHTC investments and assumed $267.3 million of unfunded commitments for LIHTC investments on January 31, 2022.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Share Basic And Diluted	The following table summarizes the calculation of basic and diluted earnings per common share: Three months ended September 30, Nine months ended September 30, (In thousands, except per share data) 2022 2021 2022 2021 Net income $ 233,968 $ 95,713 $ 399,532 $ 297,826 Less: Preferred stock dividends 4,162 1,968 11,756 5,906 Net income available to common shareholders 229,806 93,745 387,776 291,920 Less: Earnings allocated to participating securities 2,128 574 3,562 1,661 Earnings applicable to common shareholders $ 227,678 $ 93,171 $ 384,214 $ 290,259 Weighted-average common shares outstanding - basic 173,868 90,038 165,743 89,960 Effect of dilutive securities 76 194 70 226 Weighted-average common shares outstanding - diluted 173,944 90,232 165,813 90,186 Basic earnings per common share $ 1.31 $ 1.03 $ 2.32 $ 3.23 Diluted earnings per common share 1.31 1.03 2.32 3.22

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following tables present the notional amounts and fair values, including accrued interest, of derivative positions: At September 30, 2022 Asset Derivatives Liability Derivatives (In thousands) Notional Amounts Fair Value Notional Amounts Fair Value Designated as hedging instruments: Interest rate derivatives (1) $ 850,000 $ 243 $ 2,000,000 $ 16,377 Not designated as hedging instruments: Interest rate derivatives (1) 6,731,008 217,613 6,721,716 409,950 Mortgage banking derivatives (2) 4,445 36 476 3 Other (3) 155,206 1,601 485,375 447 Total not designated as hedging instruments 6,890,659 219,250 7,207,567 410,400 Gross derivative instruments, before netting $ 7,740,659 219,493 $ 9,207,567 426,777 Less: Master netting agreements 16,877 16,877 Cash collateral 185,968 — Total derivative instruments, after netting $ 16,648 $ 409,900 At December 31, 2021 Asset Derivatives Liability Derivatives (In thousands) Notional Amounts Fair Value Notional Amounts Fair Value Designated as hedging instruments: Interest rate derivatives (1) $ 1,000,000 $ 17,583 $ — $ — Not designated as hedging instruments: Interest rate derivatives (1) 4,463,048 141,243 4,372,846 21,570 Mortgage banking derivatives (2) 14,212 80 — — Other (3) 76,755 211 374,688 214 Total not designated as hedging instruments 4,554,015 141,534 4,747,534 21,784 Gross derivative instruments, before netting $ 5,554,015 159,117 $ 4,747,534 21,784 Less: Master netting agreements 6,364 6,364 Cash collateral 19,272 2,119 Total derivative instruments, after netting $ 133,481 $ 13,301 (1) Balances related to clearing houses are presented as a single unit of account. In accordance with their rule books, clearing houses legally characterize variation margin payments as settlement of derivatives rather than collateral against derivative positions. At September 30, 2022 and December 31, 2021, notional amounts of interest rate swaps cleared through clearing houses include $2.9 billion and $0.4 billion for asset derivatives, respectively, and zero and $2.6 billion for liability derivatives, respectively. The related fair values approximate zero. (2) Notional amounts related to residential loans exclude approved floating rate commitments of $2.8 million and $1.0 million at September 30, 2022 and December 31, 2021, respectively. (3) Other derivatives include foreign currency forward contracts related to lending arrangements and customer hedging activity, a Visa equity swap transaction, and risk participation agreements. Notional amounts of risk participation agreements include $103.7 million and $66.0 million for asset derivatives and $464.7 million and $338.2 million for liability derivatives at September 30, 2022 and December 31, 2021, respectively, that have insignificant related fair values.
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following tables present fair value positions transitioned from gross to net upon applying counterparty netting agreements: At September 30, 2022 (In thousands) Gross Amount Recognized Derivative Offset Amount Cash Collateral Received/Pledged Net Amount Presented Amounts Not Offset Asset derivatives $ 219,245 $ 16,877 $ 185,968 $ 16,400 $ 16,771 Liability derivatives 16,877 16,877 — — 852 At December 31, 2021 (In thousands) Gross Amount Recognized Derivative Offset Amount Cash Collateral Received/Pledged Net Amount Presented Amounts Not Offset Asset derivatives $ 25,636 $ 6,364 $ 19,272 $ — $ 51 Liability derivatives 8,483 6,364 2,119 — 428
Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location	The following table summarizes the income statement effect of derivatives designated as cash flow hedges: Recognized In Three months ended September 30, Nine months ended September 30, (In thousands) Net Interest Income 2022 2021 2022 2021 Interest rate derivatives Long-term debt $ (76) $ (90) $ (229) $ (334) Interest rate derivatives Interest and fees on loans and leases (483) 2,706 3,320 7,933 Net recognized on cash flow hedges $ (559) $ 2,616 $ 3,091 $ 7,599 The following table summarizes information related to a fair value hedging adjustment: Condensed Consolidated Balance Sheet Line Item in Which Hedged Item is Located Carrying Amount of Hedged Item Cumulative Amount of Fair Value Hedging Adjustment Included in Carrying Amount (In thousands) At September 30, At December 31, At September 30, At December 31, Long-term debt $ 334,796 $ 338,811 $ 34,796 $ 38,811
Other Derivatives Not Designated For Hedge Accounting	The following table summarizes the income statement effect of derivatives not designated as hedging instruments: Recognized In Three months ended September 30, Nine months ended September 30, (In thousands) Non-interest Income 2022 2021 2022 2021 Interest rate derivatives Other income $ 6,032 $ 2,727 $ 25,291 $ 7,132 Mortgage banking derivatives Mortgage banking activities 31 38 (47) (556) Other Other income 3,196 611 4,620 780 Total not designated as hedging instruments $ 9,259 $ 3,376 $ 29,864 $ 7,356

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Option, Disclosures	The following table compares the fair value to the unpaid principal balance of originated loans held for sale: At September 30, 2022 At December 31, 2021 (In thousands) Fair Value Unpaid Principal Balance Difference Fair Value Unpaid Principal Balance Difference Originated loans held for sale $ 898 $ 1,080 $ (182) $ 4,694 $ 5,034 $ (340)
Fair Value Of Assets And Liabilities Measured On Recurring Basis	The following tables summarize the fair values of assets and liabilities measured at fair value on a recurring basis: At September 30, 2022 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets: Available-for-sale investment securities: U.S. Treasury notes $ 713,263 $ — $ — $ 713,263 Government agency debentures — 269,028 — 269,028 Municipal bonds and notes — 1,697,145 — 1,697,145 Agency CMO — 63,861 — 63,861 Agency MBS — 2,197,349 — 2,197,349 Agency CMBS — 1,455,919 — 1,455,919 CMBS — 922,928 — 922,928 CLO — 7,203 — 7,203 Corporate debt — 702,172 — 702,172 Private label MBS — 44,310 — 44,310 Other — 11,866 — 11,866 Total available-for-sale investment securities 713,263 7,371,781 — 8,085,044 Gross derivative instruments, before netting (1) 1,591 217,902 — 219,493 Originated loans held for sale — 898 — 898 Investments held in Rabbi Trust 12,250 — — 12,250 Alternative investments (2) 522 — — 75,728 Total financial assets $ 727,626 $ 7,590,581 $ — $ 8,393,413 Financial Liabilities: Gross derivative instruments, before netting (1) $ 296 $ 426,481 $ — $ 426,777 At December 31, 2021 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets: Available-for-sale investment securities: U.S. Treasury notes $ 396,966 $ — $ — $ 396,966 Agency CMO — 90,384 — 90,384 Agency MBS — 1,593,403 — 1,593,403 Agency CMBS — 1,232,541 — 1,232,541 CMBS — 886,263 — 886,263 CLO — 21,847 — 21,847 Corporate debt — 13,450 — 13,450 Total available-for-sale investment securities 396,966 3,837,888 — 4,234,854 Gross derivative instruments, before netting (1) 187 158,930 — 159,117 Originated loans held for sale — 4,694 — 4,694 Investments held in Rabbi Trust 3,416 — — 3,416 Alternative investments (2) 1,877 — — 27,732 Total financial assets $ 402,446 $ 4,001,512 $ — $ 4,429,813 Financial Liabilities: Gross derivative instruments, before netting (1) $ 141 $ 21,643 $ — $ 21,784 (1) Additional information regarding the impact of netting derivative assets and derivative liabilities, as well as the impact from offsetting cash collateral paid to the same derivative counterparties, can be found within Note 13: Derivative Financial Instruments. (2) Certain alternative investments are recorded at NAV. Assets measured at NAV are not classified within the fair value hierarchy.
Summary Of Estimated Fair Values Of Significant Financial Instruments	The following table summarizes the carrying amounts, estimated fair values, and classifications within the fair value hierarchy of selected financial instruments and mortgage servicing assets: At September 30, 2022 At December 31, 2021 (In thousands) Carrying Fair Carrying Fair Assets: Level 1 Cash and cash equivalents $ 613,125 $ 613,125 $ 461,570 $ 461,570 Level 2 Held-to-maturity investment securities 6,505,838 5,650,119 6,198,125 6,280,936 Level 3 Loans and leases, net 47,249,550 45,896,000 21,970,542 21,702,732 Mortgage servicing assets 9,837 27,550 9,237 12,527 Liabilities: Level 2 Deposit liabilities $ 51,439,293 $ 51,439,293 $ 28,049,259 $ 28,049,259 Time deposits 2,569,594 2,503,396 1,797,770 1,794,829 Securities sold under agreements to repurchase and other borrowings 1,265,414 1,243,251 674,896 676,581 FHLB advances 3,510,717 3,509,221 10,997 11,490 Long-term debt (1) 1,074,844 1,030,390 562,931 515,912

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2022
Retirement Benefits [Abstract]
Summary of Net Periodic Benefit Cost	The following tables summarize the components of net periodic benefit (income) cost: Three months ended September 30, 2022 2021 (In thousands) Pension Plan SERP OPEB Pension Plan SERP OPEB Service cost $ — $ — $ 9 $ — $ — $ — Interest cost 1,441 17 194 1,166 7 4 Expected return on plan assets (3,669) — — (3,595) — — Amortization of actuarial loss (gain) 821 7 7 1,019 8 (20) Net periodic benefit (income) cost $ (1,407) $ 24 $ 210 $ (1,410) $ 15 $ (16) Nine months ended September 30, 2022 2021 (In thousands) Pension Plan SERP Other Benefits Pension Plan SERP Other Benefits Service cost $ — $ — $ 24 $ — $ — $ — Interest cost 4,198 49 551 3,498 20 12 Expected return on plan assets (11,006) — — (10,786) — — Amortization of actuarial loss (gain) 1,667 20 (30) 3,058 25 (60) Net periodic benefit (income) cost $ (5,141) $ 69 $ 545 $ (4,230) $ 45 $ (48)

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Operating Results And Total Assets Reportable Segments	The following tables present balance sheet information, including the appropriate allocations, for Webster's reportable segments and the Corporate and Reconciling category: At September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Goodwill $ 1,865,887 $ 57,779 $ 590,105 $ — $ 2,513,771 Total assets 40,907,410 122,112 10,120,063 17,902,981 69,052,566 At December 31, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Goodwill $ 131,000 $ 21,813 $ 385,560 $ — $ 538,373 Total assets 15,398,159 73,564 7,663,921 11,779,955 34,915,599 The following tables present results of operations, including the appropriate allocations, for Webster’s reportable segments and the Corporate and Reconciling category: Three months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 333,554 $ 58,567 $ 195,748 $ (36,866) $ 551,003 Non-interest income 40,497 25,842 33,842 13,455 113,636 Non-interest expense 102,415 36,725 109,588 81,343 330,071 Pre-tax, pre-provision net revenue 271,636 47,684 120,002 (104,754) 334,568 Provision (benefit) for credit losses 33,341 — (1,989) 5,179 36,531 Income (loss) before income taxes 238,295 47,684 121,991 (109,933) 298,037 Income tax expense (benefit) 59,574 12,779 31,718 (40,002) 64,069 Net income (loss) $ 178,721 $ 34,905 $ 90,273 $ (69,931) $ 233,968 Three months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 152,012 $ 42,074 $ 98,572 $ (62,967) $ 229,691 Non-interest income 22,782 24,756 24,292 11,945 83,775 Non-interest expense 50,244 32,374 73,212 24,407 180,237 Pre-tax, pre-provision net revenue 124,550 34,456 49,652 (75,429) 133,229 Provision (benefit) for credit losses 5,099 — 2,799 (148) 7,750 Income (loss) before income taxes 119,451 34,456 46,853 (75,281) 125,479 Income tax expense (benefit) 30,579 9,199 11,151 (21,163) 29,766 Net income (loss) $ 88,872 $ 25,257 $ 35,702 $ (54,118) $ 95,713 Nine months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 954,044 $ 152,702 $ 511,712 $ (186,547) $ 1,431,911 Non-interest income 128,670 79,352 92,541 38,041 338,604 Non-interest expense 294,375 110,674 312,464 330,570 $ 1,048,083 Pre-tax, pre-provision net revenue 788,339 $ 121,380 291,789 (479,076) 722,432 Provision (benefit) for credit losses 238,054 — (5,906) 5,471 237,619 Income (loss) before income tax expense 550,285 121,380 297,695 (484,547) 484,813 Income tax expense (benefit) 133,966 32,530 77,352 (158,567) 85,281 Net income (loss) $ 416,319 $ 88,850 $ 220,343 $ (325,980) $ 399,532 Nine months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Reconciling Consolidated Total Net interest income $ 434,087 $ 126,376 $ 281,012 $ (167,168) $ 674,307 Non-interest income 59,536 78,315 71,262 24,121 233,234 Non-interest expense 142,803 100,802 222,672 88,970 555,247 Pre-tax, pre-provision net revenue 350,820 103,889 129,602 (232,017) 352,294 (Benefit) for credit losses (37,602) — (1,833) (65) (39,500) Income (loss) before income tax expense 388,422 103,889 131,435 (231,952) 391,794 Income tax expense (benefit) 99,436 27,738 31,282 (64,488) 93,968 Net income (loss) $ 288,986 $ 76,151 $ 100,153 $ (167,464) $ 297,826

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables summarize revenues recognized in accordance with ASC Topic 606, Revenue from Contracts with Customers. These disaggregated amounts, together with sources of other non-interest income that are subject to other GAAP topics, have been reconciled to non-interest income by reportable segment as presented within Note 16: Segment Reporting. Three months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 7,573 $ 24,008 $ 18,728 $ 498 $ 50,807 Loan and lease related fees (1) 5,623 — — — 5,623 Wealth and investment services 2,672 — 8,756 (9) 11,419 Other income — 1,834 413 — 2,247 Revenue from contracts with customers 15,868 25,842 27,897 489 70,096 Other sources of non-interest income 24,629 — 5,945 12,966 43,540 Total non-interest income $ 40,497 $ 25,842 $ 33,842 $ 13,455 $ 113,636 Three months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 4,206 $ 22,886 $ 13,079 $ 87 $ 40,258 Wealth and investment services 3,067 — 6,926 (8) 9,985 Other income — 1,870 626 — 2,496 Revenue from contracts with customers 7,273 24,756 20,631 79 52,739 Other sources of non-interest income 15,509 — 3,661 11,866 31,036 Total non-interest income $ 22,782 $ 24,756 $ 24,292 $ 11,945 $ 83,775 Nine months ended September 30, 2022 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 21,905 $ 74,091 $ 53,057 $ 966 $ 150,019 Loan and lease related fees (1) 16,198 — — — 16,198 Wealth and investment services 8,576 — 24,706 (22) 33,260 Other income — 5,261 1,083 — 6,344 Revenue from contracts with customers 46,679 79,352 78,846 944 205,821 Other sources of non-interest income 81,991 — 13,695 37,097 132,783 Total non-interest income $ 128,670 $ 79,352 $ 92,541 $ 38,041 $ 338,604 Nine months ended September 30, 2021 (In thousands) Commercial Banking HSA Bank Consumer Banking Corporate and Consolidated Non-interest Income: Deposit service fees $ 12,400 $ 72,382 $ 37,127 $ 257 $ 122,166 Wealth and investment services 9,029 — 20,472 (26) 29,475 Other income — 5,933 1,753 — 7,686 Revenue from contracts with customers 21,429 78,315 59,352 231 159,327 Other sources of non-interest income 38,107 — 11,910 23,890 73,907 Total non-interest income $ 59,536 $ 78,315 $ 71,262 $ 24,121 $ 233,234 (1) A portion of loan and lease related fees comprises income generated from factored receivables and payroll financing activities that is within the scope of ASC Topic 606. These revenue streams were new to Webster as of the first quarter of 2022 due to the businesses acquired in connection with the Sterling merger.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Outstanding Financial Instruments Contract Amounts Represent Credit Risk	The following table summarizes the outstanding amounts of credit-related financial instruments with off-balance sheet risk: (In thousands) At September 30, At December 31, 2021 Commitments to extend credit $ 10,809,256 $ 6,870,095 Standby letters of credit 382,988 224,061 Commercial letters of credit 57,368 58,175 Total credit-related financial instruments with off-balance sheet risk $ 11,249,612 $ 7,152,331
Activity In Allowance For Losses	The following tables summarize the change in the ACL on loans and leases by portfolio segment: At or for the three months ended September 30, 2022 2021 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Balance, beginning of period $ 511,745 $ 59,754 $ 571,499 $ 263,071 $ 44,874 $ 307,945 Provision (benefit) 34,513 (3,161) 31,352 7,681 217 7,898 Charge-offs (31,356) (1,453) (32,809) (1,723) (2,053) (3,776) Recoveries 1,413 2,870 4,283 142 2,713 2,855 Balance, end of period $ 516,315 $ 58,010 $ 574,325 $ 269,171 $ 45,751 $ 314,922 At or for the nine months ended September 30, 2022 2021 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Balance, beginning of period $ 257,877 $ 43,310 $ 301,187 $ 312,244 $ 47,187 $ 359,431 Initial allowance for PCD loans and leases (1) 78,376 9,669 88,045 — — — Provision (benefit) 230,881 1,267 232,148 (37,049) (2,386) (39,435) Charge-offs (61,361) (3,469) (64,830) (8,638) (7,835) (16,473) Recoveries 10,542 7,233 17,775 2,614 8,785 11,399 Balance, end of period $ 516,315 $ 58,010 $ 574,325 $ 269,171 $ 45,751 $ 314,922 Individually evaluated for impairment 36,394 13,278 49,672 7,791 4,308 12,099 Collectively evaluated for impairment $ 479,921 $ 44,732 $ 524,653 $ 261,380 $ 41,443 $ 302,823 (1) Represents the establishment of the initial reserve for PCD loans and leases, which is reported net of $48.3 million of day one charge-offs recognized at the date of acquisition in accordance with GAAP. The following table summarizes the activity in the ACL on unfunded loan commitments: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Balance, beginning of period $ 20,149 $ 11,974 $ 13,104 $ 12,755 ACL assumed from Sterling — — 6,749 — Provision (benefit) for credit losses 5,180 196 5,476 (585) Balance, end of period $ 25,329 $ 12,170 $ 25,329 $ 12,170

Mergers and Acquisitions - Narr

Mergers and Acquisitions - Narrative (Details) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Feb. 18, 2022 USD ($)	Jan. 31, 2022 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Jan. 30, 2022 shares	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Preferred stock, shares authorized (in shares) | shares		400,000,000	3,000,000		3,000,000		200,000,000		3,000,000
Preferred stock, convertible | shares		1
Depositary shares issued (in shares) | shares		5,400,000
Depositary share, interest in a share of preferred stock		0.025
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01		$ 0.01				$ 0.01
Depositary share, liquidation preference (in dollars per share) | $ / shares		$ 25
Goodwill			$ 2,513,771	$ 538,373	$ 2,513,771	$ 538,373			$ 538,373	$ 538,373
Provision (benefit) for credit losses			36,531	$ 7,750	$ 237,619	$ (39,500)
Series A Preferred Stock
Business Acquisition [Line Items]
Preferred stock, dividend percentage		6.50%
Series G Preferred Stock
Business Acquisition [Line Items]
Preferred stock, dividend percentage		6.50%
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01
Liquidation preference (in dollars per share) | $ / shares		$ 1,000
Series F Preferred Stock
Business Acquisition [Line Items]
Preferred stock, dividend percentage		5.25%
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01
Liquidation preference (in dollars per share) | $ / shares		$ 25,000
Sterling
Business Acquisition [Line Items]
Share exchange ratio		0.4630
Goodwill		$ 1,939,432						$ 1,900,000
Provision (benefit) for credit losses			$ 175,100
Net assets acquired		$ 3,240,868
Sterling | Core deposits
Business Acquisition [Line Items]
Acquired intangible assets, useful life		10 years
Sterling | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets, useful life		10 years
Bend Financial, Inc.
Business Acquisition [Line Items]
Equity interests acquired	100%
Cash consideration	$ 55,300
Net assets acquired	19,300
Bend Financial, Inc. | Internal use software
Business Acquisition [Line Items]
Intangible assets acquired	15,900
Bend Financial, Inc. | Customer relationships
Business Acquisition [Line Items]
Intangible assets acquired	$ 3,000

Mergers and Acquisitions - Summ

Mergers and Acquisitions - Summary of Purchase Price Consideration (Details) - Sterling - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 31, 2022	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Business Acquisition [Line Items]
Webster common stock issued (in shares)	87,965,239
Price per share of Webster common stock on January 31, 2022 (in dollars per share)	$ 56.81
Total consideration	$ 5,180,300
Common Stock
Business Acquisition [Line Items]
Total consideration	4,997,305
Preferred Stock
Business Acquisition [Line Items]
Total consideration	138,942		$ 138,942	$ 0
Replacement Equity Awards
Business Acquisition [Line Items]
Total consideration	43,877
Stock compensation expense		$ 2,600	$ 16,400
Fractional Shares
Business Acquisition [Line Items]
Total consideration	$ 176

Mergers and Acquisitions - Su_2

Mergers and Acquisitions - Summary of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Sep. 30, 2022	Jan. 01, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Liabilities:
Goodwill		$ 2,513,771		$ 538,373	$ 538,373	$ 538,373
ROU lease assets, location	Premises and equipment, net
Operating lease liabilities, location	Accrued expenses and other liabilities
Sterling
Business Acquisition [Line Items]
Total consideration	$ 5,180,300
Assets:
Cash and due from banks	510,929
Interest-bearing deposits	3,207
Investment securities available-for-sale	4,429,948
Federal Home Loan Bank and Federal Reserve Bank Stock	150,502
Loans held for sale	23,517
Unpaid principal balance, total loans and leases		20,816,348
Total loans and leases	20,498,706
Deferred tax assets, net	(52,130)
Premises and equipment	264,421
Other intangible assets	210,100
Bank-owned life insurance policies	645,510
Accrued interest receivable and other assets	959,501
Total assets acquired	27,644,211
Liabilities:
Non-interest-bearing deposits	6,620,248
Interest-bearing deposits	16,643,755
Securities sold under agreements to repurchase and other borrowings	27,184
Long-term debt	516,881
Accrued expenses and other liabilities	595,275
Total liabilities assumed	24,403,343
Net assets acquired	3,240,868
Goodwill	1,939,432		$ 1,900,000
ROU lease assets	100,000
Operating lease liabilities	106,900
Sterling | Commercial non-mortgage
Assets:
Unpaid principal balance, total loans and leases		5,570,782
Total loans and leases	5,527,657
Sterling | Asset-based
Assets:
Unpaid principal balance, total loans and leases		694,137
Total loans and leases	683,958
Sterling | Commercial real estate
Assets:
Unpaid principal balance, total loans and leases		6,790,600
Total loans and leases	6,656,405
Sterling | Multi-family
Assets:
Unpaid principal balance, total loans and leases		4,303,381
Total loans and leases	4,255,906
Sterling | Equipment financing
Assets:
Unpaid principal balance, total loans and leases		1,350,579
Total loans and leases	1,314,311
Sterling | Warehouse lending
Assets:
Unpaid principal balance, total loans and leases		647,767
Total loans and leases	643,754
Sterling | Residential
Assets:
Unpaid principal balance, total loans and leases		1,313,785
Total loans and leases	1,281,637
Sterling | Home equity
Assets:
Unpaid principal balance, total loans and leases		132,758
Total loans and leases	122,553
Sterling | Other consumer
Assets:
Unpaid principal balance, total loans and leases		$ 12,559
Total loans and leases	$ 12,525

Mergers and Acquisitions - Sche

Mergers and Acquisitions - Schedule of PCD Loans and Leases by Portfolio Segment (Details) - Sterling $ in Thousands	Jan. 31, 2022 USD ($)
Business Acquisition [Line Items]
Unpaid principal balance	$ 3,936,434
ACL at acquisition	(136,316)
Non-credit (discount)	(43,731)
Fair value	3,756,387
Commercial
Business Acquisition [Line Items]
Unpaid principal balance	3,394,963
ACL at acquisition	(115,464)
Non-credit (discount)	(40,947)
Fair value	3,238,552
Consumer
Business Acquisition [Line Items]
Unpaid principal balance	541,471
ACL at acquisition	(20,852)
Non-credit (discount)	(2,784)
Fair value	$ 517,835

Mergers and Acquisitions - Su_3

Mergers and Acquisitions - Summary of Supplemental Pro Forma Information (Details) - Sterling - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Acquisition [Line Items]
Net interest income	$ 538,125	$ 440,300	$ 1,436,867	$ 1,344,827
Non-interest income	113,636	120,961	349,405	347,928
Net income	$ 239,569	$ 181,980	$ 636,174	$ 368,051

Mergers and Acquisitions- Summa

Mergers and Acquisitions- Summary of Supplemental Pro Forma Information Adjustments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) location	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) location	Sep. 30, 2021 USD ($)
Business Acquisition [Line Items]
Locations closing under consolidation plan | location	14		14
Sterling
Business Acquisition [Line Items]
Merger-related expenses	$ 25,536	$ 9,847	$ 200,671	$ 26,894
Approximate reduction in real estate	45%		45%
Compensation and benefits | Sterling
Business Acquisition [Line Items]
Merger-related expenses	$ 5,770	7,731	$ 71,472	8,197
Occupancy | Sterling
Business Acquisition [Line Items]
Merger-related expenses	4,389	0	35,744	0
Occupancy | Sterling | Right Of Use Assets
Business Acquisition [Line Items]
Merger-related expenses	23,100
Technology and equipment | Sterling
Business Acquisition [Line Items]
Merger-related expenses	1,478	33	21,375	33
Professional and outside services | Sterling
Business Acquisition [Line Items]
Merger-related expenses	10,792	2,028	59,073	18,315
Marketing | Sterling
Business Acquisition [Line Items]
Merger-related expenses	64	0	199	0
Other expense | Sterling
Business Acquisition [Line Items]
Merger-related expenses	$ 3,043	$ 55	$ 12,808	$ 349

Investment Securities (Summary

Investment Securities (Summary Of Debt Securities Available-for-Sale) (Detail) $ in Thousands	Sep. 30, 2022 USD ($) holding	Dec. 31, 2021 USD ($) holding
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	$ 9,026,804	$ 4,227,697
Unrealized Gains	21	41,499
Unrealized Losses	(941,781)	(34,342)
Investment securities available-for-sale, at fair value	8,085,044	4,234,854
Less than 12 months, fair value	6,811,526	2,272,641
Less than 12 months, unrealized losses	(757,586)	(17,086)
12 months or more, fair value	1,271,502	558,515
12 months or more, unrealized losses	$ (184,195)	$ (17,256)
Total, number of holdings | holding	1,340	162
Total, fair value	$ 8,083,028	$ 2,831,156
Total, unrealized losses	(941,781)	(34,342)
Amortized Cost
Due in one year or less	59,790
Due after one year through five years	1,452,511
Due after five through ten years	1,437,643
Due after ten years	6,076,860
Amortized Cost - Total available-for-sale debt securities	9,026,804	4,227,697
Fair Value
Due in one year or less	58,824
Due after one year through five years	1,361,398
Due after five through ten years	1,306,402
Due after ten years	5,358,420
Fair Value, Total available-for-sale debt securities	8,085,044	4,234,854
Available-for-sale securities pledged	4,960,865	1,780,164
U.S. Treasury notes
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	755,414	398,664
Unrealized Gains	0	0
Unrealized Losses	(42,151)	(1,698)
Investment securities available-for-sale, at fair value	713,263	396,966
Less than 12 months, fair value	713,263	396,966
Less than 12 months, unrealized losses	$ (42,151)	$ (1,698)
Total, number of holdings | holding	23	8
Total, fair value	$ 713,263	$ 396,966
Total, unrealized losses	(42,151)	(1,698)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	755,414	398,664
Fair Value
Fair Value, Total available-for-sale debt securities	713,263	396,966
Government agency debentures
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	311,982
Unrealized Gains	0
Unrealized Losses	(42,954)
Investment securities available-for-sale, at fair value	269,028
Less than 12 months, fair value	269,028
Less than 12 months, unrealized losses	$ (42,954)
Total, number of holdings | holding	20
Total, fair value	$ 269,028
Total, unrealized losses	(42,954)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	311,982
Fair Value
Fair Value, Total available-for-sale debt securities	269,028
Municipal bonds and notes
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	1,842,985
Unrealized Gains	0
Unrealized Losses	(145,840)
Investment securities available-for-sale, at fair value	1,697,145
Less than 12 months, fair value	1,696,419
Less than 12 months, unrealized losses	$ (145,840)
Total, number of holdings | holding	499
Total, fair value	$ 1,696,419
Total, unrealized losses	(145,840)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	1,842,985
Fair Value
Fair Value, Total available-for-sale debt securities	1,697,145
Agency CMO
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	68,886	88,109
Unrealized Gains	0	2,326
Unrealized Losses	(5,025)	(51)
Investment securities available-for-sale, at fair value	63,861	90,384
Less than 12 months, fair value	62,951	7,895
Less than 12 months, unrealized losses	(5,013)	$ (51)
12 months or more, fair value	910
12 months or more, unrealized losses	$ (12)
Total, number of holdings | holding	39	2
Total, fair value	$ 63,861	$ 7,895
Total, unrealized losses	(5,025)	(51)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	68,886	88,109
Fair Value
Fair Value, Total available-for-sale debt securities	63,861	90,384
Agency MBS
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	2,533,669	1,568,293
Unrealized Gains	21	36,130
Unrealized Losses	(336,341)	(11,020)
Investment securities available-for-sale, at fair value	2,197,349	1,593,403
Less than 12 months, fair value	1,794,195	506,602
Less than 12 months, unrealized losses	(252,060)	(7,354)
12 months or more, fair value	401,864	110,687
12 months or more, unrealized losses	$ (84,281)	$ (3,666)
Total, number of holdings | holding	460	70
Total, fair value	$ 2,196,059	$ 617,289
Total, unrealized losses	(336,341)	(11,020)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	2,533,669	1,568,293
Fair Value
Fair Value, Total available-for-sale debt securities	2,197,349	1,593,403
Agency CMBS
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	1,697,243	1,248,548
Unrealized Gains	0	2,537
Unrealized Losses	(241,324)	(18,544)
Investment securities available-for-sale, at fair value	1,455,919	1,232,541
Less than 12 months, fair value	991,740	632,213
Less than 12 months, unrealized losses	(154,725)	(6,163)
12 months or more, fair value	464,179	335,480
12 months or more, unrealized losses	$ (86,599)	$ (12,381)
Total, number of holdings | holding	132	28
Total, fair value	$ 1,455,919	$ 967,693
Total, unrealized losses	(241,324)	(18,544)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	1,697,243	1,248,548
Fair Value
Fair Value, Total available-for-sale debt securities	1,455,919	1,232,541
CMBS
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	949,535	887,640
Unrealized Gains	0	506
Unrealized Losses	(26,607)	(1,883)
Investment securities available-for-sale, at fair value	922,928	886,263
Less than 12 months, fair value	534,261	724,762
Less than 12 months, unrealized losses	(14,954)	(1,744)
12 months or more, fair value	388,667	81,253
12 months or more, unrealized losses	$ (11,653)	$ (139)
Total, number of holdings | holding	53	50
Total, fair value	$ 922,928	$ 806,015
Total, unrealized losses	(26,607)	(1,883)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	949,535	887,640
Fair Value
Fair Value, Total available-for-sale debt securities	922,928	886,263
CLO
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	7,219	21,860
Unrealized Gains	0	0
Unrealized Losses	(16)	(13)
Investment securities available-for-sale, at fair value	7,203	21,847
12 months or more, fair value	7,203	21,848
12 months or more, unrealized losses	$ (16)	$ (13)
Total, number of holdings | holding	1	1
Total, fair value	$ 7,203	$ 21,848
Total, unrealized losses	(16)	(13)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	7,219	21,860
Fair Value
Fair Value, Total available-for-sale debt securities	7,203	21,847
Corporate debt
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	797,931	14,583
Unrealized Gains	0	0
Unrealized Losses	(95,759)	(1,133)
Investment securities available-for-sale, at fair value	702,172	13,450
Less than 12 months, fair value	693,493	4,203
Less than 12 months, unrealized losses	(94,125)	(76)
12 months or more, fair value	8,679	9,247
12 months or more, unrealized losses	$ (1,634)	$ (1,057)
Total, number of holdings | holding	106	3
Total, fair value	$ 702,172	$ 13,450
Total, unrealized losses	(95,759)	(1,133)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	797,931	14,583
Fair Value
Fair Value, Total available-for-sale debt securities	702,172	13,450
Private label MBS
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	49,408
Unrealized Gains	0
Unrealized Losses	(5,098)
Investment securities available-for-sale, at fair value	44,310
Less than 12 months, fair value	44,310
Less than 12 months, unrealized losses	$ (5,098)
Total, number of holdings | holding	3
Total, fair value	$ 44,310
Total, unrealized losses	(5,098)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	49,408
Fair Value
Fair Value, Total available-for-sale debt securities	44,310
Other
Debt Securities, Available-for-sale [Abstract]
Amortized Cost - Total available-for-sale debt securities	12,532
Unrealized Gains	0
Unrealized Losses	(666)
Investment securities available-for-sale, at fair value	11,866
Less than 12 months, fair value	11,866
Less than 12 months, unrealized losses	$ (666)
Total, number of holdings | holding	4
Total, fair value	$ 11,866
Total, unrealized losses	(666)
Amortized Cost
Amortized Cost - Total available-for-sale debt securities	12,532
Fair Value
Fair Value, Total available-for-sale debt securities	11,866
Pledged For Borrowings
Fair Value
Available-for-sale securities pledged	1,282,501	924,841
Pledged For Municipal Deposits
Fair Value
Available-for-sale securities pledged	$ 3,678,364	$ 855,323

Investment Securities (Summar_2

Investment Securities (Summary of Held-to-Maturity Debt Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Amortized Cost	$ 6,506,047		$ 6,198,339
Unrealized Gains	882		138,254
Unrealized Losses	(856,810)		(55,657)
Fair Value	5,650,119		6,280,936
Allowance	209	$ 210	214	$ 234	$ 382	$ 299
Net Carrying Value	6,505,838		6,198,125
Interest receivable	19,700		21,200
Agency CMO
Schedule of Investments [Line Items]
Amortized Cost	29,854		42,405
Unrealized Gains	0		655
Unrealized Losses	(2,063)		(25)
Fair Value	27,791		43,035
Allowance	0		0
Net Carrying Value	29,854		42,405
Agency MBS
Schedule of Investments [Line Items]
Amortized Cost	2,701,984		2,901,593
Unrealized Gains	674		71,444
Unrealized Losses	(379,332)		(11,788)
Fair Value	2,323,326		2,961,249
Allowance	0		0
Net Carrying Value	2,701,984		2,901,593
Agency CMBS
Schedule of Investments [Line Items]
Amortized Cost	2,691,955		2,378,475
Unrealized Gains	0		11,202
Unrealized Losses	(372,838)		(43,844)
Fair Value	2,319,117		2,345,833
Allowance	0		0
Net Carrying Value	2,691,955		2,378,475
Municipal bonds and notes
Schedule of Investments [Line Items]
Amortized Cost	930,390		705,918
Unrealized Gains	208		51,572
Unrealized Losses	(92,284)		0
Fair Value	838,314		757,490
Allowance	209		214
Net Carrying Value	930,181		705,704
CMBS
Schedule of Investments [Line Items]
Amortized Cost	151,864		169,948
Unrealized Gains	0		3,381
Unrealized Losses	(10,293)		0
Fair Value	141,571		173,329
Allowance	0		0
Net Carrying Value	$ 151,864		$ 169,948

Investment Securities (Sales of

Investment Securities (Sales of Available-for-Sale Debt Securities) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale of available-for-sale securities	$ 65,300	$ 65,330	$ 0
Debt Securities, Available-for-Sale, Realized Loss	$ 2,200	$ 2,200

Investments Securities (Allowan

Investments Securities (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 210	$ 382	$ 214	$ 299
(Benefit) for credit losses	(1)	(148)	(5)	(65)
Balance, end of period	$ 209	$ 234	$ 209	$ 234

Investment Securities (Summar_3

Investment Securities (Summary Of Debt Securities Held-to Maturity - Contractual Maturities, Credit Quality and Other Information) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 2,158
Due after one year through five years	52,383
Due after five years through ten years	334,065
Due after ten years	6,117,441
Amortized Cost	6,506,047	$ 6,198,339
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Due in one year or less	2,155
Due after one year through five years	52,315
Due after five years through ten years	312,347
Due after ten years	5,283,302
Fair Value	5,650,119	6,280,936
Held-to-maturity securities pledged	2,296,225	3,077,256
Moody's, Aaa Rating
Amortized Cost
Amortized Cost	488,392	377,374
Moody's, Aa1 Rating
Amortized Cost
Amortized Cost	5,587,275	5,442,277
Moody's, Aa2 Rating
Amortized Cost
Amortized Cost	255,616	227,106
Moody's, Aa3 Rating
Amortized Cost
Amortized Cost	117,095	104,232
Moody's, A1 Rating
Amortized Cost
Amortized Cost	38,349	35,878
Moody's, A2 Rating
Amortized Cost
Amortized Cost	4,165	8,260
Moody's, A3 Rating
Amortized Cost
Amortized Cost	0	0
Moody's, Baa2 Rating
Amortized Cost
Amortized Cost	95	95
Moody's, Not Rated
Amortized Cost
Amortized Cost	15,060	3,117
Agency CMO
Amortized Cost
Amortized Cost	29,854	42,405
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Fair Value	27,791	43,035
Agency CMO | Moody's, Aaa Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, Aa1 Rating
Amortized Cost
Amortized Cost	29,854	42,405
Agency CMO | Moody's, Aa2 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, Aa3 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, A1 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, A2 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, A3 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, Baa2 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMO | Moody's, Not Rated
Amortized Cost
Amortized Cost	0	0
Agency MBS
Amortized Cost
Amortized Cost	2,701,984	2,901,593
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Fair Value	2,323,326	2,961,249
Agency MBS | Moody's, Aaa Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, Aa1 Rating
Amortized Cost
Amortized Cost	2,701,984	2,901,593
Agency MBS | Moody's, Aa2 Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, Aa3 Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, A1 Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, A2 Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, A3 Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, Baa2 Rating
Amortized Cost
Amortized Cost	0	0
Agency MBS | Moody's, Not Rated
Amortized Cost
Amortized Cost	0	0
Agency CMBS
Amortized Cost
Amortized Cost	2,691,955	2,378,475
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Fair Value	2,319,117	2,345,833
Agency CMBS | Moody's, Aaa Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, Aa1 Rating
Amortized Cost
Amortized Cost	2,691,955	2,378,475
Agency CMBS | Moody's, Aa2 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, Aa3 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, A1 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, A2 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, A3 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, Baa2 Rating
Amortized Cost
Amortized Cost	0	0
Agency CMBS | Moody's, Not Rated
Amortized Cost
Amortized Cost	0	0
Municipal bonds and notes
Amortized Cost
Amortized Cost	930,390	705,918
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Fair Value	838,314	757,490
Municipal bonds and notes | Moody's, Aaa Rating
Amortized Cost
Amortized Cost	336,528	207,426
Municipal bonds and notes | Moody's, Aa1 Rating
Amortized Cost
Amortized Cost	163,482	119,804
Municipal bonds and notes | Moody's, Aa2 Rating
Amortized Cost
Amortized Cost	255,616	227,106
Municipal bonds and notes | Moody's, Aa3 Rating
Amortized Cost
Amortized Cost	117,095	104,232
Municipal bonds and notes | Moody's, A1 Rating
Amortized Cost
Amortized Cost	38,349	35,878
Municipal bonds and notes | Moody's, A2 Rating
Amortized Cost
Amortized Cost	4,165	8,260
Municipal bonds and notes | Moody's, A3 Rating
Amortized Cost
Amortized Cost	0	0
Municipal bonds and notes | Moody's, Baa2 Rating
Amortized Cost
Amortized Cost	95	95
Municipal bonds and notes | Moody's, Not Rated
Amortized Cost
Amortized Cost	15,060	3,117
CMBS
Amortized Cost
Amortized Cost	151,864	169,948
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Fair Value	141,571	173,329
CMBS | Moody's, Aaa Rating
Amortized Cost
Amortized Cost	151,864	169,948
CMBS | Moody's, Aa1 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, Aa2 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, Aa3 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, A1 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, A2 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, A3 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, Baa2 Rating
Amortized Cost
Amortized Cost	0	0
CMBS | Moody's, Not Rated
Amortized Cost
Amortized Cost	0	0
Pledged For Borrowings
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Held-to-maturity securities pledged	269,920	1,243,139
Pledged For Municipal Deposits
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Held-to-maturity securities pledged	$ 2,026,305	$ 1,834,117

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2022	Jan. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Increase in available for sale debt securities	$ 3,900,000,000
Interest receivable		$ 42,800,000		$ 7,500,000
Held-to-maturity debt securities		6,506,047,000		6,198,339,000
Held-to-maturity investment securities in non-accrual status		0		0
Investment securities available-for-sale, at fair value		8,085,044,000		$ 4,234,854,000
Sterling
Schedule of Investments [Line Items]
Investment securities available-for-sale			$ 4,429,948,000
Callable
Schedule of Investments [Line Items]
Held-to-maturity debt securities		900,000,000
Investment securities available-for-sale, at fair value		$ 3,000,000,000

Loans and Leases (By Portfolio

Loans and Leases (By Portfolio and Class) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 47,823,875	$ 22,271,729
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	38,473,572	15,179,966
Commercial | Commercial non-mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	15,148,507	6,882,480
Commercial | Asset-based
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,803,719	1,067,248
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	12,742,888	5,463,321
Commercial | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	6,119,731	1,139,859
Commercial | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,764,289	627,058
Commercial | Warehouse lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	894,438	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	9,350,303	7,091,763
Consumer | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	7,617,955	5,412,905
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,662,756	1,593,559
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 69,592	$ 85,299

Loans and Leases (Narrative) (D

Loans and Leases (Narrative) (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($) loan	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($) loan	Jan. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in loans and leases			$ 25,600,000
Loans and leases purchase discount	$ 317,600		317,600
Unamortized premiums	(83,400)		(83,400)			$ 12,300
Interest receivable	175,800		175,800			50,700
Interest on non-accrual loans	7,600	$ 2,400	14,100	$ 7,200
Aggregated amortized cost of loans and leases	900		900
Loans and leases modified as TDRs within previous 12 months for which there was a payment default | loan		0		0
Sterling
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases					$ 20,498,706
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write-down	0	$ 1,100	10,000	$ 3,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write-down	100	$ 0	200	$ 300
Collateral Pledged | FHLB | Asset Pledged as Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	10,000,000		10,000,000
Collateral Pledged | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable	77,200		77,200			16,600
Collateral Pledged | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable	46,300		46,300			34,900
Collateral Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable	$ 147,900		$ 147,900			$ 86,000

Loans and Leases (Summary Of Lo

Loans and Leases (Summary Of Loan And Lease Portfolio Aging By Class Of Loan) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 47,823,875	$ 22,271,729
90 or More Days Past Due and Accruing	703	2,496
Non-accrual	200,233	109,927
Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	246,078	131,842
30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	34,753	12,329
60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	10,389	7,090
Current
Financing Receivable, Past Due [Line Items]
Loans and leases	47,577,797	22,139,887
Commercial
Financing Receivable, Past Due [Line Items]
Loans and leases	38,473,572	15,179,966
90 or More Days Past Due and Accruing	703	2,496
Non-accrual	143,952	70,467
Commercial | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	171,571	83,175
Commercial | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	21,380	5,271
Commercial | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	5,536	4,941
Commercial | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	38,302,001	15,096,791
Commercial | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	15,148,507	6,882,480
90 or More Days Past Due and Accruing	703	1,977
Non-accrual	61,598	59,607
Commercial | Commercial non-mortgage | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	78,529	69,837
Commercial | Commercial non-mortgage | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	12,270	3,729
Commercial | Commercial non-mortgage | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	3,958	4,524
Commercial | Commercial non-mortgage | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	15,069,978	6,812,643
Commercial | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	1,803,719	1,067,248
90 or More Days Past Due and Accruing	0	0
Non-accrual	25,093	2,086
Commercial | Asset-based | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	25,093	2,086
Commercial | Asset-based | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Commercial | Asset-based | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Commercial | Asset-based | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	1,778,626	1,065,162
Commercial | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	12,742,888	5,463,321
90 or More Days Past Due and Accruing	0	519
Non-accrual	41,961	5,046
Commercial | Commercial real estate | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	47,267	6,490
Commercial | Commercial real estate | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	5,172	508
Commercial | Commercial real estate | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	134	417
Commercial | Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	12,695,621	5,456,831
Commercial | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	6,119,731	1,139,859
90 or More Days Past Due and Accruing	0	0
Non-accrual	1,972	0
Commercial | Multi-family | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	2,735	0
Commercial | Multi-family | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	677	0
Commercial | Multi-family | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	86	0
Commercial | Multi-family | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	6,116,996	1,139,859
Commercial | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,764,289	627,058
90 or More Days Past Due and Accruing	0	0
Non-accrual	13,328	3,728
Commercial | Equipment financing | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	17,947	4,762
Commercial | Equipment financing | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	3,261	1,034
Commercial | Equipment financing | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,358	0
Commercial | Equipment financing | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	1,746,342	622,296
Commercial | Warehouse lending
Financing Receivable, Past Due [Line Items]
Loans and leases	894,438	0
90 or More Days Past Due and Accruing	0
Non-accrual	0
Commercial | Warehouse lending | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	0
Commercial | Warehouse lending | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	0
Commercial | Warehouse lending | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	0
Commercial | Warehouse lending | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	894,438
Consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	9,350,303	7,091,763
90 or More Days Past Due and Accruing	0	0
Non-accrual	56,281	39,460
Consumer | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	74,507	48,667
Consumer | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	13,373	7,058
Consumer | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	4,853	2,149
Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	9,275,796	7,043,096
Consumer | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	7,617,955	5,412,905
90 or More Days Past Due and Accruing	0	0
Non-accrual	25,309	15,747
Consumer | Residential | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	37,805	19,327
Consumer | Residential | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	8,969	3,212
Consumer | Residential | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	3,527	368
Consumer | Residential | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	7,580,150	5,393,578
Consumer | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	1,662,756	1,593,559
90 or More Days Past Due and Accruing	0	0
Non-accrual	30,700	23,489
Consumer | Home equity | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	35,940	28,556
Consumer | Home equity | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	4,083	3,467
Consumer | Home equity | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,157	1,600
Consumer | Home equity | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	1,626,816	1,565,003
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	69,592	85,299
90 or More Days Past Due and Accruing	0	0
Non-accrual	272	224
Consumer | Other consumer | Total Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	762	784
Consumer | Other consumer | 30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	321	379
Consumer | Other consumer | 60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	169	181
Consumer | Other consumer | Current
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 68,830	$ 84,515

Loans and Leases (Nonaccrual) (

Loans and Leases (Nonaccrual) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	$ 200,233	$ 109,927
Non-accrual with No Allowance	62,580	40,704
Commercial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	143,952	70,467
Non-accrual with No Allowance	35,621	11,198
Commercial | Commercial non-mortgage
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	61,598	59,607
Non-accrual with No Allowance	27,002	4,802
Commercial | Asset-based
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	25,093	2,086
Non-accrual with No Allowance	1,525	2,086
Commercial | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	41,961	5,046
Non-accrual with No Allowance	4,028	4,310
Commercial | Multi-family
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	1,972	0
Non-accrual with No Allowance	1,111	0
Commercial | Equipment financing
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	13,328	3,728
Non-accrual with No Allowance	1,955	0
Commercial | Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	56,281	39,460
Non-accrual with No Allowance	26,959	29,506
Consumer | Residential
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	25,309	15,747
Non-accrual with No Allowance	9,540	10,584
Consumer | Home equity
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	30,700	23,489
Non-accrual with No Allowance	17,416	18,920
Consumer | Other consumer
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	272	224
Non-accrual with No Allowance	$ 3	$ 2

Loans and Leases (Activity In A

Loans and Leases (Activity In Allowance For Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, end of period	$ 574,325	$ 314,922	$ 574,325	$ 314,922	$ 571,499	$ 307,945
(Benefit) for credit losses	31,352	7,898	232,148	(39,435)
Allowance for Loan and Lease Losses, Write-offs	(32,809)	(3,776)
Recoveries	4,283	2,855
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, end of period	516,315	269,171	516,315	269,171	511,745	263,071
(Benefit) for credit losses	34,513	7,681	230,881	(37,049)
Allowance for Loan and Lease Losses, Write-offs	(31,356)	(1,723)
Recoveries	1,413	142
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, end of period	58,010	45,751	58,010	45,751	$ 59,754	$ 44,874
(Benefit) for credit losses	(3,161)	217	$ 1,267	$ (2,386)
Allowance for Loan and Lease Losses, Write-offs	(1,453)	(2,053)
Recoveries	$ 2,870	$ 2,713

Loans and Leases (Allowance For

Loans and Leases (Allowance For Loan And Lease Losses By Portfolio Segment) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				$ 301,187	$ 359,431
Initial allowance for PCD loans and leases				88,045	0
Provision (benefit)		$ 31,352	$ 7,898	232,148	(39,435)
Charge-offs				(64,830)	(16,473)
Recoveries				17,775	11,399
Balance, end of period		574,325	314,922	574,325	314,922
ALLL, Individually evaluated for impairment		49,672	12,099	49,672	12,099
ALLL, Collectively evaluated for impairment		524,653	302,823	524,653	302,823
PCD loans | Sterling
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge-offs	$ (48,300)
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				257,877	312,244
Initial allowance for PCD loans and leases				78,376	0
Provision (benefit)		34,513	7,681	230,881	(37,049)
Charge-offs				(61,361)	(8,638)
Recoveries				10,542	2,614
Balance, end of period		516,315	269,171	516,315	269,171
ALLL, Individually evaluated for impairment		36,394	7,791	36,394	7,791
ALLL, Collectively evaluated for impairment		479,921	261,380	479,921	261,380
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				43,310	47,187
Initial allowance for PCD loans and leases				9,669	0
Provision (benefit)		(3,161)	217	1,267	(2,386)
Charge-offs				(3,469)	(7,835)
Recoveries				7,233	8,785
Balance, end of period		58,010	45,751	58,010	45,751
ALLL, Individually evaluated for impairment		13,278	4,308	13,278	4,308
ALLL, Collectively evaluated for impairment		$ 44,732	$ 41,443	$ 44,732	$ 41,443

Loans and Leases (Credit Qualit

Loans and Leases (Credit Quality Indicators) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases	$ 47,823,875	$ 22,271,729
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	8,301,896	3,902,968
Year two	5,964,414	2,337,777
Year three	3,873,994	2,272,548
Year four	3,866,963	1,772,381
Year five	2,699,870	796,050
Prior	6,015,057	1,829,351
Revolving Loans Amortized Cost Basis	7,751,378	2,268,891
Loans and leases	38,473,572	15,179,966
Commercial | Commercial non-mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	4,204,756	2,288,196
Year two	2,147,604	1,249,399
Year three	1,192,547	825,657
Year four	922,222	667,171
Year five	758,472	307,613
Prior	923,995	310,671
Revolving Loans Amortized Cost Basis	4,998,911	1,233,773
Loans and leases	15,148,507	6,882,480
Commercial | Asset-based
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	8,072	7,609
Year two	7,610	19,141
Year three	26,900	14,896
Year four	17,254	14,131
Year five	14,561	6,113
Prior	56,370	25,850
Revolving Loans Amortized Cost Basis	1,672,952	979,508
Loans and leases	1,803,719	1,067,248
Commercial | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2,450,937	1,152,526
Year two	2,258,609	736,386
Year three	1,803,394	1,146,376
Year four	1,855,541	679,028
Year five	1,243,996	450,074
Prior	3,023,233	1,243,887
Revolving Loans Amortized Cost Basis	107,178	55,044
Loans and leases	12,742,888	5,463,321
Commercial | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,309,097	222,875
Year two	1,161,641	136,324
Year three	453,710	185,087
Year four	699,899	364,822
Year five	542,443	17,054
Prior	1,875,042	213,131
Revolving Loans Amortized Cost Basis	77,899	566
Loans and leases	6,119,731	1,139,859
Commercial | Equipment financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	329,034	231,762
Year two	388,950	196,527
Year three	397,443	100,532
Year four	372,047	47,229
Year five	140,398	15,196
Prior	136,417	35,812
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	1,764,289	627,058
Commercial | Warehouse lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	0
Year three	0
Year four	0
Year five	0
Prior	0
Revolving Loans Amortized Cost Basis	894,438
Loans and leases	894,438	0
Commercial | Pass | Commercial non-mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	4,106,108	2,270,320
Year two	2,132,870	1,179,620
Year three	1,120,386	757,343
Year four	883,826	581,633
Year five	685,660	292,637
Prior	890,405	275,789
Revolving Loans Amortized Cost Basis	4,906,060	1,182,562
Loans and leases	14,725,315	6,539,904
Commercial | Pass | Asset-based
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	8,072	7,609
Year two	7,610	19,141
Year three	16,883	12,810
Year four	15,729	13,456
Year five	14,561	6,113
Prior	56,370	25,850
Revolving Loans Amortized Cost Basis	1,563,434	920,496
Loans and leases	1,682,659	1,005,475
Commercial | Pass | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2,428,963	1,152,431
Year two	2,248,840	733,220
Year three	1,760,942	1,146,149
Year four	1,803,958	594,180
Year five	1,128,337	384,664
Prior	2,873,117	1,136,384
Revolving Loans Amortized Cost Basis	107,178	55,044
Loans and leases	12,351,335	5,202,072
Commercial | Pass | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,309,097	222,875
Year two	1,123,973	135,924
Year three	453,324	185,087
Year four	698,885	322,688
Year five	489,177	17,054
Prior	1,843,835	203,558
Revolving Loans Amortized Cost Basis	68,623	566
Loans and leases	5,986,914	1,087,752
Commercial | Pass | Equipment financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	328,553	231,762
Year two	382,901	188,031
Year three	378,176	93,547
Year four	364,598	41,276
Year five	127,688	14,864
Prior	126,879	32,588
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	1,708,795	602,068
Commercial | Pass | Warehouse lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	0
Year three	0
Year four	0
Year five	0
Prior	0
Revolving Loans Amortized Cost Basis	894,438
Loans and leases	894,438
Commercial | Special mention | Commercial non-mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	73,417	14,216
Year two	13,288	22,892
Year three	0	37,877
Year four	310	15,575
Year five	1,118	9,721
Prior	14,781	15,399
Revolving Loans Amortized Cost Basis	43,220	27,808
Loans and leases	146,134	143,488
Commercial | Special mention | Asset-based
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	675
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	40,279	59,012
Loans and leases	40,279	59,687
Commercial | Special mention | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	21,974	95
Year two	8,267	3,084
Year three	33,548	0
Year four	22,300	84,475
Year five	91,283	51,536
Prior	60,346	79,096
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	237,718	218,286
Commercial | Special mention | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	37,668	0
Year three	0	0
Year four	95	35,201
Year five	40,506	0
Prior	9,915	0
Revolving Loans Amortized Cost Basis	9,276	0
Loans and leases	97,460	35,201
Commercial | Special mention | Equipment financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	195	108
Year three	573	2,229
Year four	1,691	3,341
Year five	6,826	0
Prior	1,128	600
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	10,413	6,278
Commercial | Substandard | Commercial non-mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	25,231	3,660
Year two	1,442	46,887
Year three	72,161	30,437
Year four	38,086	69,963
Year five	71,694	5,255
Prior	18,809	19,483
Revolving Loans Amortized Cost Basis	46,113	23,403
Loans and leases	273,536	199,088
Commercial | Substandard | Asset-based
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	10,017	2,086
Year four	1,525	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	69,239	0
Loans and leases	80,781	2,086
Commercial | Substandard | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	1,502	82
Year three	8,904	227
Year four	29,282	373
Year five	24,376	13,874
Prior	89,736	28,407
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	153,800	42,963
Commercial | Substandard | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	400
Year three	386	0
Year four	919	6,933
Year five	12,760	0
Prior	21,292	9,573
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	35,357	16,906
Commercial | Substandard | Equipment financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	481	0
Year two	5,854	8,388
Year three	18,694	4,756
Year four	5,758	2,612
Year five	5,884	332
Prior	8,410	2,624
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	45,081	18,712
Commercial | Doubtful | Commercial non-mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	4
Year three	0
Year four	0
Year five	0
Prior	0
Revolving Loans Amortized Cost Basis	3,518
Loans and leases	3,522
Commercial | Doubtful | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	0
Year three	0
Year four	1
Year five	0
Prior	34
Revolving Loans Amortized Cost Basis	0
Loans and leases	35
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,531,124	2,198,697
Year two	2,425,617	1,077,624
Year three	980,280	502,707
Year four	443,293	144,883
Year five	131,240	274,746
Prior	2,538,455	1,669,802
Revolving Loans Amortized Cost Basis	1,300,294	1,223,304
Loans and leases	9,350,303	7,091,763
Consumer | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,472,561	2,096,428
Year two	2,328,255	999,477
Year three	917,348	448,723
Year four	410,287	96,219
Year five	96,054	246,929
Prior	2,393,450	1,525,129
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	7,617,955	5,412,905
Consumer | Residential | 800+
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	334,705	590,238
Year two	911,161	428,118
Year three	449,160	161,664
Year four	161,434	35,502
Year five	33,136	105,198
Prior	1,006,403	735,517
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	2,895,999	2,056,237
Consumer | Residential | 740-799
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	786,495	1,083,608
Year two	1,008,396	421,380
Year three	336,307	154,960
Year four	119,615	32,172
Year five	39,329	95,662
Prior	769,948	456,722
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	3,060,090	2,244,504
Consumer | Residential | 670 to 739
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	308,253	374,460
Year two	359,002	135,146
Year three	115,708	73,499
Year four	59,946	25,099
Year five	18,853	34,550
Prior	407,928	227,863
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	1,269,690	870,617
Consumer | Residential | 580-669
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	32,779	38,644
Year two	44,896	13,782
Year three	14,772	9,348
Year four	8,598	3,056
Year five	3,283	9,000
Prior	150,773	71,811
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	255,101	145,641
Consumer | Residential | 579 and below
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	10,329	9,478
Year two	4,800	1,051
Year three	1,401	49,252
Year four	60,694	390
Year five	1,453	2,519
Prior	58,398	33,216
Revolving Loans Amortized Cost Basis	0	0
Loans and leases	137,075	95,906
Consumer | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	56,511	97,754
Year two	93,258	63,192
Year three	55,667	26,916
Year four	22,050	40,010
Year five	31,614	26,344
Prior	143,624	143,834
Revolving Loans Amortized Cost Basis	1,260,032	1,195,509
Loans and leases	1,662,756	1,593,559
Consumer | Home equity | 800+
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	19,190	35,678
Year two	34,258	30,157
Year three	27,296	9,591
Year four	8,379	16,347
Year five	12,193	11,068
Prior	55,519	58,189
Revolving Loans Amortized Cost Basis	482,328	463,334
Loans and leases	639,163	624,364
Consumer | Home equity | 740-799
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	21,246	42,430
Year two	37,099	22,030
Year three	18,237	9,413
Year four	7,772	13,317
Year five	10,382	7,711
Prior	36,451	33,777
Revolving Loans Amortized Cost Basis	417,840	409,518
Loans and leases	549,027	538,196
Consumer | Home equity | 670 to 739
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	13,616	17,493
Year two	18,679	9,162
Year three	8,092	5,889
Year four	3,693	8,220
Year five	7,218	5,802
Prior	33,343	31,160
Revolving Loans Amortized Cost Basis	256,835	233,744
Loans and leases	341,476	311,470
Consumer | Home equity | 580-669
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2,016	1,773
Year two	2,832	1,397
Year three	1,383	1,298
Year four	1,616	1,066
Year five	1,114	1,329
Prior	13,264	15,042
Revolving Loans Amortized Cost Basis	75,542	66,361
Loans and leases	97,767	88,266
Consumer | Home equity | 579 and below
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	443	380
Year two	390	446
Year three	659	725
Year four	590	1,060
Year five	707	434
Prior	5,047	5,666
Revolving Loans Amortized Cost Basis	27,487	22,552
Loans and leases	35,323	31,263
Consumer | Consumer Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2,052	4,515
Year two	4,104	14,955
Year three	7,265	27,068
Year four	10,956	8,654
Year five	3,572	1,473
Prior	1,381	839
Revolving Loans Amortized Cost Basis	40,262	27,795
Loans and leases	69,592	85,299
Consumer | Consumer Loan | 800+
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	363	463
Year two	246	1,343
Year three	783	2,398
Year four	1,229	916
Year five	425	231
Prior	108	118
Revolving Loans Amortized Cost Basis	21,121	10,160
Loans and leases	24,275	15,629
Consumer | Consumer Loan | 740-799
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	646	2,588
Year two	2,761	5,408
Year three	2,544	8,303
Year four	3,227	2,985
Year five	1,287	379
Prior	889	77
Revolving Loans Amortized Cost Basis	10,816	9,528
Loans and leases	22,170	29,268
Consumer | Consumer Loan | 670 to 739
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	820	1,061
Year two	770	7,034
Year three	3,404	13,602
Year four	5,281	3,859
Year five	1,535	607
Prior	281	412
Revolving Loans Amortized Cost Basis	5,321	5,644
Loans and leases	17,412	32,219
Consumer | Consumer Loan | 580-669
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	169	256
Year two	211	1,083
Year three	424	2,550
Year four	1,019	735
Year five	263	216
Prior	72	211
Revolving Loans Amortized Cost Basis	1,560	1,267
Loans and leases	3,718	6,318
Consumer | Consumer Loan | 579 and below
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	54	147
Year two	116	87
Year three	110	215
Year four	200	159
Year five	62	40
Prior	31	21
Revolving Loans Amortized Cost Basis	1,444	1,196
Loans and leases	$ 2,017	$ 1,865

Loans and Leases (Summary Of Th

Loans and Leases (Summary Of The Recorded Investment Of Company's TDRs) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDRs	$ 170,744		$ 170,744		$ 163,344
Additional funds committed to borrowers in TDR status	1,193		1,193		5,975
Specific reserves for TDRs included in the ACL on loans and leases:	574,325	$ 314,922	574,325	$ 314,922	301,187	$ 359,431
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDRs included in the ACL on loans and leases:	516,315	269,171	516,315	269,171	257,877	312,244
Write-down	0	(1,100)	(10,000)	(3,000)
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDRs included in the ACL on loans and leases:	58,010	45,751	58,010	45,751	43,310	$ 47,187
Write-down	(100)	$ 0	(200)	$ (300)
Performing Financial Instruments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDRs	105,703		105,703		110,625
Nonperforming Financial Instruments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDRs	65,041		65,041		52,719
Nonperforming Financial Instruments | Troubled Debt Restructures | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDRs included in the ACL on loans and leases:	7,274		7,274		9,017
Nonperforming Financial Instruments | Troubled Debt Restructures | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDRs included in the ACL on loans and leases:	$ 3,863		$ 3,863		$ 3,745

Loans and Leases (Information o

Loans and Leases (Information on How Loans and Leases were Modified as a TDR) (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2022 USD ($) loan	Sep. 30, 2021 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	30	6	82	49
Recorded Investment | $	$ 20,135	$ 295	$ 50,582	$ 4,113
Commercial | Extended maturity | Commercial non-mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	1	1	3	8
Recorded Investment | $	$ 24	$ 48	$ 121	$ 605
Commercial | Extended maturity | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	0	0	0	1
Recorded Investment | $	$ 0	$ 0	$ 0	$ 183
Commercial | Maturity/rate combined | Commercial non-mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	3	2	8	8
Recorded Investment | $	$ 322	$ 94	$ 765	$ 304
Commercial | Other | Commercial non-mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	15	0	16	3
Recorded Investment | $	$ 17,408	$ 0	$ 40,372	$ 114
Commercial | Other | Equipment financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	0	0	1	0
Recorded Investment | $	$ 0	$ 0	$ 1,157	$ 0
Consumer | Extended maturity | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	0	0	1	1
Recorded Investment | $	$ 0	$ 0	$ 893	$ 99
Consumer | Extended maturity | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	0	0	0	1
Recorded Investment | $	$ 0	$ 0	$ 0	$ 28
Consumer | Maturity/rate combined | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	1	0	1	2
Recorded Investment | $	$ 124	$ 0	$ 124	$ 401
Consumer | Maturity/rate combined | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	3	0	14	6
Recorded Investment | $	$ 1,515	$ 0	$ 2,239	$ 1,025
Consumer | Adjusted interest rate | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	0	0	1	0
Recorded Investment | $	$ 0	$ 0	$ 74	$ 0
Consumer | Other | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	1	0	7	2
Recorded Investment | $	$ 298	$ 0	$ 3,060	$ 233
Consumer | Other | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | loan	6	3	30	17
Recorded Investment | $	$ 444	$ 153	$ 1,777	$ 1,121

Transfers and Servicing of Fi_3

Transfers and Servicing of Financial Assets (Loans sold) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage banking activities	$ 86	$ 1,525	$ 616	$ 5,486
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Origination fees	22	313	194	1,231
Mortgage banking activities	86	1,525	616	5,486
Consumer | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain on sale	26	1,063	529	4,523
Fair value adjustment	38	149	(107)	(268)
Proceeds from sale	1,053	52,256	33,886	199,991
Consumer | Loans sold with servicing rights retained
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale	$ 147	$ 50,643	$ 30,464	$ 192,421

Transfers and Servicing of Fi_4

Transfers and Servicing of Financial Assets (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Proceeds from sale of loans not originated for sale			$ 648,573	$ 61,274
Mortgage banking activities	$ 86	$ 1,525	616	5,486
Residential
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Proceeds from sale of loans not originated for sale	530,100	12,200	648,600
Commercial
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Proceeds from sale of loans not originated for sale				61,300
Mortgage banking activities	(100)	600	3,100	1,300
Consumer
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Mortgage banking activities	86	1,525	616	5,486
Consumer | Residential
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Retained servicing rights	2,000,000		2,000,000		$ 2,000,000
Loan servicing fees, net	$ 1,300	$ 400	$ 2,900	$ 1,200

Transfers and Servicing of Fi_5

Transfers and Servicing of Financial Assets (Servicing Assets at Amortized Cost Roll Forward) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning Balance	$ 8,592	$ 11,501	$ 9,237	$ 13,422
Additions	1,627	483	2,751	1,685
Amortization	(382)	(1,363)	(2,151)	(4,295)
Adjustment to valuation allowance	0	(454)	0	(645)
Ending Balance	9,837	10,167	9,837	10,167
Business Acquisition [Line Items]
Additions	$ 1,627	$ 483	2,751	$ 1,685
Sterling
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Additions			900
Business Acquisition [Line Items]
Additions			$ 900

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Goodwill [Roll Forward]
Balance, beginning of period	$ 538,373	$ 538,373
Balance, end of period	2,513,771	538,373
Sterling
Goodwill [Roll Forward]
Goodwill acquired	1,939,432	0
Bend
Goodwill [Roll Forward]
Goodwill acquired	$ 35,966	$ 0

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Gross Carrying Value And Accumulated Amortization Of Other Intangible Assets) (Detail) - USD ($) $ in Thousands	Jan. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 260,725	$ 47,625
Accumulated Amortization		53,456	29,756
Net Carrying Amount		207,269	17,869
Sterling and Bend
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, useful life	10 years
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		145,725	26,625
Accumulated Amortization		32,022	18,516
Net Carrying Amount		113,703	8,109
Core deposits | Sterling and Bend
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 119,100
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		115,000	21,000
Accumulated Amortization		21,434	11,240
Net Carrying Amount		$ 93,566	$ 9,760
Customer relationships | Sterling and Bend
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 94,000

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Schedule Of Expected Future Amortization Expense) (Detail) $ in Thousands	Sep. 30, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2022	$ 8,230
2023	30,315
2024	24,442
2025	21,455
2026	21,455
Thereafter	$ 101,372

Deposits (Summary Of Deposits)

Deposits (Summary Of Deposits) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Non-interest-bearing:
Demand	$ 13,849,812	$ 7,060,488
Interest-bearing:
HSA	7,889,310	7,397,582
Checking	9,203,220	4,182,497
Money market	11,156,579	3,718,953
Savings	9,340,372	5,689,739
Time deposits	2,569,594	1,797,770
Total interest-bearing	40,159,075	22,786,541
Total deposits	54,008,887	29,847,029
Time deposits, money market, and interest-bearing checking obtained through brokers	613,305	120,392
Aggregate amount of time deposit accounts that exceeded the FDIC limit	551,132	256,522
Demand deposit overdrafts reclassified as loan balances	$ 9,148	$ 1,577

Deposits (Scheduled Maturities

Deposits (Scheduled Maturities Of Time Deposits) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Deposit Liabilities [Abstract]
Remainder of 2022	$ 827,351
2023	1,353,411
2024	161,239
2025	134,877
2026	59,115
Thereafter	33,601
Time deposits	$ 2,569,594	$ 1,797,770

Borrowings (Summary Of Securiti

Borrowings (Summary Of Securities Sold Under Agreements To Repurchase And Other Borrowings) (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2022 USD ($) loan	Dec. 31, 2021 USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Amount of long-term debt agreements extinguished | loan	2
Amount of debt extinguished	$ 100,000
Proceeds from extinguishment of borrowings	2,500
Securities sold under agreements to repurchase
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 312,089	$ 674,896
Rate	0.11%	0.47%
Federal funds purchased
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 953,325	$ 0
Rate	3.17%	0%
Securities sold under agreements to repurchase and other borrowings
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 1,265,414	$ 674,896
Rate	2.41%	0.47%
Original maturity of one year or less | Securities sold under agreements to repurchase
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 312,089	$ 474,896
Rate	0.11%	0.11%
Original maturity of greater than one year, non-callable (2) | Securities sold under agreements to repurchase
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 0	$ 200,000
Rate	0%	1.32%

Borrowings (Summary Of Advances

Borrowings (Summary Of Advances Payable To the Federal Home Loan Bank) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Maturity, Rolling Year [Abstract]
FHLB advances maturing within 1 year, Total Outstanding	$ 3,500,145	$ 90
FHLB advances maturing after 1 but within 2 years, Total Outstanding	122	202
FHLB advances maturing after 2 but within 3 years, Total Outstanding	0	0
FHLB advances maturing after 3 but within 4 years, Total Outstanding	0	0
FHLB advances maturing after 4 but within 5 years, Total Outstanding	0	0
FHLB advances maturing after 5 years, Total Outstanding	10,450	10,705
Total FHLB advances	$ 3,510,717	$ 10,997
Federal Home Loan Bank, Advances, Weighted Average Interest Rate [Abstract]
FHLB advances maturing within 1 year, Weighted Average Contractual Coupon Rate (as a percent)	3.03%	0%
FHLB advances maturing after 1 but within 2 years, Weighted Average Contractual Coupon Rate (as a percent)	2.51%	2.95%
FHLB advances maturing after 2 but within 3 years, Weighted Average Contractual Coupon Rate (as a percent)	0%	0%
FHLB advances maturing after 3 but within 4 years, Weighted Average Contractual Coupon Rate (as a percent)	0%	0%
FHLB advances maturing after 4 but within 5 years, Weighted Average Contractual Coupon Rate (as a percent)	0%	0%
FHLB advances maturing after 5 years, Weighted Average Contractual Coupon Rate (as a percent)	2.03%	2.03%
Federal Home Loan Bank, Advances, Weighted Average Contractual Coupon Rate (as a percent)	3.03%	2.03%
Aggregate carrying value of assets pledged as collateral	$ 9,973,866	$ 7,556,034
Remaining borrowing capacity at FHLB	$ 3,513,563	$ 5,087,294

Borrowings (Long Term Debt) (De

Borrowings (Long Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Notes and subordinated debt	$ 1,061,116	$ 566,131
Debt issuance cost on senior fixed-rates	(1,924)	(2,226)
Long-term debt	1,074,844	562,931
Hedge basis adjustment	$ 334,796	$ 338,811
Variable interest rate	6.48%	3.17%
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	2.95%
Senior Notes
Debt Instrument [Line Items]
Discount on senior fixed-rate notes	$ (811)	$ (974)
Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Senior notes, interest rate (as a percent)	4.375%
Notes and subordinated debt	$ 150,000	150,000
Senior Notes | Senior Notes Due 2029
Debt Instrument [Line Items]
Senior notes, interest rate (as a percent)	4.10%
Notes and subordinated debt	$ 334,796	338,811
Hedge basis adjustment	34,800	38,800
Subordinated Debt
Debt Instrument [Line Items]
Premium on subordinated fixed-to-floating rate notes	$ 16,463	0
Subordinated Debt | Subordinated Notes Due 2029
Debt Instrument [Line Items]
Senior notes, interest rate (as a percent)	4%
Notes and subordinated debt	$ 274,000	0
Subordinated Debt | Subordinated Notes Due 2030
Debt Instrument [Line Items]
Senior notes, interest rate (as a percent)	3.875%
Notes and subordinated debt	$ 225,000	0
Junior subordinated debt
Debt Instrument [Line Items]
Notes and subordinated debt	77,320	77,320
Long-term Debt
Debt Instrument [Line Items]
Hedge basis adjustment	$ 34,796	$ 38,811

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Jan. 31, 2022	Dec. 31, 2021
Assets Sold under Agreements to Repurchase [Line Items]
Notes and subordinated debt	$ 1,061,116		$ 566,131
Sterling
Assets Sold under Agreements to Repurchase [Line Items]
Long-term debt		$ 516,881
Subordinated Notes Due 2029 | Subordinated Debt
Assets Sold under Agreements to Repurchase [Line Items]
Notes and subordinated debt	$ 274,000		0
Senior notes, interest rate (as a percent)	4%
Subordinated Notes Due 2029 | Subordinated Debt | Sterling
Assets Sold under Agreements to Repurchase [Line Items]
Long-term debt		281,000
Subordinated Notes Due 2029 | Subordinated Debt | SOFR rate
Assets Sold under Agreements to Repurchase [Line Items]
Basis spread on variable interest rate	2.53%
Subordinated Notes Due 2030 | Subordinated Debt
Assets Sold under Agreements to Repurchase [Line Items]
Notes and subordinated debt	$ 225,000		$ 0
Senior notes, interest rate (as a percent)	3.875%
Subordinated Notes Due 2030 | Subordinated Debt | Sterling
Assets Sold under Agreements to Repurchase [Line Items]
Long-term debt		$ 235,900
Subordinated Notes Due 2030 | Subordinated Debt | SOFR rate
Assets Sold under Agreements to Repurchase [Line Items]
Basis spread on variable interest rate	3.69%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive (Loss) Income, Net of Tax (Schedule of Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 7,997,788	$ 3,329,705	$ 3,438,325	$ 3,234,625
Other comprehensive (loss) before reclassifications	(258,536)	(5,954)	(719,418)	(45,425)
Amounts reclassified from accumulated other comprehensive (loss)	2,967	1,572	5,097	4,677
Other comprehensive (loss) income, net of tax	(255,569)	(4,382)	(714,321)	(40,748)
Ending Balance	7,826,410	3,386,189	7,826,410	3,386,189
Available For Sale and Transferred Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(445,616)	35,598	4,536	67,424
Other comprehensive (loss) before reclassifications	(243,872)	(3,394)	(694,024)	(35,220)
Amounts reclassified from accumulated other comprehensive (loss)	1,641	0	1,641	0
Other comprehensive (loss) income, net of tax	(242,231)	(3,394)	(692,383)	(35,220)
Ending Balance	(687,847)	32,204	(687,847)	32,204
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,082)	13,894	6,070	19,918
Other comprehensive (loss) before reclassifications	(14,416)	(2,560)	(24,099)	(10,205)
Amounts reclassified from accumulated other comprehensive (loss)	717	829	2,248	2,450
Other comprehensive (loss) income, net of tax	(13,699)	(1,731)	(21,851)	(7,755)
Ending Balance	(15,781)	12,163	(15,781)	12,163
Defined Benefit Pension and Other Postretirement Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(33,634)	(43,602)	(33,186)	(45,086)
Other comprehensive (loss) before reclassifications	(248)	0	(1,295)	0
Amounts reclassified from accumulated other comprehensive (loss)	609	743	1,208	2,227
Other comprehensive (loss) income, net of tax	361	743	(87)	2,227
Ending Balance	(33,273)	(42,859)	(33,273)	(42,859)
Accumulated Other Comprehensive Income (Loss), Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(481,332)	5,890	(22,580)	42,256
Other comprehensive (loss) income, net of tax	(255,569)	(4,382)	(714,321)	(40,748)
Ending Balance	$ (736,901)	$ 1,508	$ (736,901)	$ 1,508

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive (Loss) Income, Net of Tax (Schedule of Accumulated Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	$ (64,069)	$ (29,766)	$ (85,281)	$ (93,968)
Net of tax	(2,967)	(1,572)	(5,097)	(4,677)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	(717)	(829)	(2,248)	(2,450)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of accumualted comprehensive income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	268	293	837	867
Net of tax	(717)	(829)	(2,248)	(2,450)
Hedge terminations	(76)	(76)	(229)	(229)
Premium amortization	(909)	(1,046)	(2,856)	(3,088)
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss)
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Actuarial loss amortization	(835)	(1,008)	(1,657)	(3,023)
Defined benefit pension and postretirement benefit plans
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	(609)	(743)	(1,208)	(2,227)
Income tax expense	226	265	449	796
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	593		593	0
Net of tax	(1,641)	0	(1,641)	0
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Reclassification out of accumualted comprehensive income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized (losses)	$ (2,234)	0	$ (2,234)	$ 0
Income tax expense		$ 0

Regulatory Capital and Restri_3

Regulatory Capital and Restrictions (Information On The Capital Ratios) (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 risk-based capital, Actual Amount	$ 5,637,725		$ 5,637,725		$ 2,804,290
CET1 risk-based capital, Actual Ratio	0.1080		0.1080		0.1172
CET1 risk-based capital, Minimum Requirement Amount	$ 2,348,463		$ 2,348,463		$ 1,076,871
CET1 risk-based capital, Well Capitalized Amount	3,392,224		3,392,224		1,555,480
Total risk-based capital, Actual Amount	$ 6,984,237		$ 6,984,237		$ 3,265,064
Total risk-based capital, Actual Ratio	0.1338		0.1338		0.1364
Total risk-based capital, Capital Requirements, Minimum Amount	$ 4,175,045		$ 4,175,045		$ 1,914,436
Total risk-based capital, Capital Requirements, Minimum Ratio	0.080		0.080		0.080
Total risk-based capital, Capital Requirements, Well Capitalized Amount	$ 5,218,807		$ 5,218,807		$ 2,393,046
Total risk-based capital, Capital Requirements, Well Capitalized Ratio	0.100		0.100		0.100
Tier 1 capital, Actual Amount	$ 5,921,704		$ 5,921,704		$ 2,949,327
Tier 1 capital, Actual Ratio	0.1135		0.1135		0.1232
Tier 1 capital, Capital Requirements, Minimum Amount	$ 3,131,284		$ 3,131,284		$ 1,435,827
Tier 1 capital, Capital Requirements, Minimum Ratio	0.060		0.060		0.060
Tier 1 capital, Capital Requirements, Well Capitalized Amount	$ 4,175,045		$ 4,175,045		$ 1,914,436
Tier 1 capital, Capital Requirements, Well Capitalized Ratio	0.080		0.080		0.080
Tier 1 leverage capital ratio, Actual Amount	$ 5,921,704		$ 5,921,704		$ 2,949,327
Tier 1 leverage capital ratio, Actual Ratio	0.0898		0.0898		0.0847
Tier 1 leverage capital ratio, Capital Requirements, Minimum Amount	$ 2,637,840		$ 2,637,840		$ 1,393,607
Tier 1 leverage capital ratio, Capital Requirements, Minimum Ratio	0.040		0.040		0.040
Tier 1 leverage capital ratio, Capital Requirements, Well Capitalized Amount	$ 3,297,301		$ 3,297,301		$ 1,742,008
Tier 1 leverage capital ratio, Capital Requirements, Well Capitalized Ratio	0.050		0.050		0.050
Dividends paid	$ 250,000	$ 40,000	$ 375,000	$ 160,000
Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 risk-based capital, Actual Amount	$ 6,487,577		$ 6,487,577		$ 3,034,883
CET1 risk-based capital, Actual Ratio	0.1246		0.1246		0.1269
CET1 risk-based capital, Minimum Requirement Amount	$ 2,342,827		$ 2,342,827		$ 1,075,920
CET1 risk-based capital, Well Capitalized Amount	3,384,084		3,384,084		1,554,107
Total risk-based capital, Actual Amount	$ 6,957,328		$ 6,957,328		$ 3,273,300
Total risk-based capital, Actual Ratio	0.1336		0.1336		0.1369
Total risk-based capital, Capital Requirements, Minimum Amount	$ 4,165,026		$ 4,165,026		$ 1,912,747
Total risk-based capital, Capital Requirements, Minimum Ratio	0.080		0.080		0.080
Total risk-based capital, Capital Requirements, Well Capitalized Amount	$ 5,206,283		$ 5,206,283		$ 2,390,934
Total risk-based capital, Capital Requirements, Well Capitalized Ratio	0.100		0.100		0.100
Tier 1 capital, Actual Amount	$ 6,487,577		$ 6,487,577		$ 3,034,883
Tier 1 capital, Actual Ratio	0.1246		0.1246		0.1269
Tier 1 capital, Capital Requirements, Minimum Amount	$ 3,123,770		$ 3,123,770		$ 1,434,560
Tier 1 capital, Capital Requirements, Minimum Ratio	0.060		0.060		0.060
Tier 1 capital, Capital Requirements, Well Capitalized Amount	$ 4,165,026		$ 4,165,026		$ 1,912,747
Tier 1 capital, Capital Requirements, Well Capitalized Ratio	0.080		0.080		0.080
Tier 1 leverage capital ratio, Actual Amount	$ 6,487,577		$ 6,487,577		$ 3,034,883
Tier 1 leverage capital ratio, Actual Ratio	0.0985		0.0985		0.0872
Tier 1 leverage capital ratio, Capital Requirements, Minimum Amount	$ 2,634,102		$ 2,634,102		$ 1,392,821
Tier 1 leverage capital ratio, Capital Requirements, Minimum Ratio	0.040		0.040		0.040
Tier 1 leverage capital ratio, Capital Requirements, Well Capitalized Amount	$ 3,292,628		$ 3,292,628		$ 1,741,026
Tier 1 leverage capital ratio, Capital Requirements, Well Capitalized Ratio	0.050		0.050		0.050
Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 risk-based capital, Actual Ratio	0.045		0.045		0.045
Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 risk-based capital, Actual Ratio	0.045		0.045		0.045
Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 risk-based capital, Actual Ratio	0.065		0.065		0.065
Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 risk-based capital, Actual Ratio	0.065		0.065		0.065

Variable Interest Entities - Su

Variable Interest Entities - Summary of LIHTC Investments and Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jan. 31, 2022	Dec. 31, 2021
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Gross investment in LIHTC	$ 707,619		$ 68,635
Accumulated amortization	(56,887)		(25,216)
Net investment in LIHTC	650,732		43,419
Unfunded commitments for LIHTC investments	$ 311,282		$ 11,106
Sterling
Variable Interest Entity [Line Items]
Gross investment in LIHTC		$ 515,600
Unfunded commitments for LIHTC investments		$ 267,300

Variable Interest Entities - Na

Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets	$ 69,052,566		$ 34,915,599
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liabilities assumed	123,400	$ 10,600
Other Investments | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	124,300		61,500
Unfunded Loan Commitment | Other Non-Marketable Investments | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss	$ 219,100		$ 95,900

Earnings Per Common Share (Earn

Earnings Per Common Share (Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share Reconciliation [Abstract]
Net income	$ 233,968	$ 95,713	$ 399,532	$ 297,826
Less: Preferred stock dividends	4,162	1,968	11,756	5,906
Earnings applicable to common shareholders	229,806	93,745	387,776	291,920
Net income available to common shareholders	229,806	93,745	387,776	291,920
Less: (Loss) earnings allocated to participating securities, basic	2,128	574	3,562	1,661
Less: (Loss) earnings allocated to participating securities, diluted	2,128	574	3,562	1,661
Earnings applicable to common shareholders	227,678	93,171	384,214	290,259
Earnings applicable to common shareholders	$ 227,678	$ 93,171	$ 384,214	$ 290,259
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - basic (in shares)	173,868	90,038	165,743	89,960
Effect of dilutive securities (in shares)	76	194	70	226
Weighted-average common shares outstanding - diluted (in shares)	173,944	90,232	165,813	90,186
Earnings Per Share, Basic and Diluted [Abstract]
Basic (loss) earnings per common share (in dollars per share)	$ 1.31	$ 1.03	$ 2.32	$ 3.23
Diluted (loss) earnings per common share (in shares)	$ 1.31	$ 1.03	$ 2.32	$ 3.22

Earnings Per Common Share (Narr

Earnings Per Common Share (Narrative) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restricted stock (due to performance conditions on non-participating shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	97,294	0	330,688	47,161

Derivative Financial Instrume_3

Derivative Financial Instruments (Schedule fair value of derivative instruments) (Detail) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	$ 7,740,659,000	$ 5,554,015,000
Asset Derivatives, Fair Value, before netting	219,493,000	159,117,000
Asset Derivatives, Fair Value, Less: Master netting agreements	16,877,000	6,364,000
Asset Derivatives, Fair Value, Less: Cash collateral posted	185,968,000	19,272,000
Total derivative instruments, after netting	16,648,000	133,481,000
Liability Derivatives, Notional Amount	9,207,567,000	4,747,534,000
Liability Derivatives, Fair Value	426,777,000	21,784,000
Liability Derivatives, Fair Value, Less: Master netting agreements	16,877,000	6,364,000
Liability Derivatives, Fair Value, Less: Cash collateral posted	0	2,119,000
Total derivative instruments, after netting	409,900,000	13,301,000
CME
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value, Less: Cash collateral posted	64,800,000
Total derivative instruments, after netting	0
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	219,245,000	25,636,000
Asset Derivatives, Fair Value, Less: Master netting agreements	16,877,000	6,364,000
Total derivative instruments, after netting	185,968,000	19,272,000
Liability Derivatives, Fair Value	16,877,000	8,483,000
Liability Derivatives, Fair Value, Less: Master netting agreements	16,877,000	6,364,000
Total derivative instruments, after netting	0	2,119,000
Designated as Hedging Instrument | Interest rate derivatives
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	850,000,000	1,000,000,000
Asset Derivatives, Fair Value	243,000	17,583,000
Liability Derivatives, Notional Amount	2,000,000,000	0
Liability Derivatives, Fair Value	16,377,000	0
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	6,890,659,000	4,554,015,000
Asset Derivatives, Fair Value, Total	219,250,000	141,534,000
Liability Derivatives, Notional Amount	7,207,567,000	4,747,534,000
Liability Derivatives, Fair Value, Positions not subject to master netting agreement	410,400,000	21,784,000
Not Designated as Hedging Instrument | Interest rate derivatives
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	6,731,008,000	4,463,048,000
Asset Derivatives, Fair Value	217,613,000	141,243,000
Liability Derivatives, Notional Amount	6,721,716,000	4,372,846,000
Liability Derivatives, Fair Value	409,950,000	21,570,000
Not Designated as Hedging Instrument | Mortgage Banking Derivatives | RPA-Out
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	4,445,000	14,212,000
Asset Derivatives, Fair Value	36,000	80,000
Not Designated as Hedging Instrument | Mortgage Banking Derivatives | RPA-In
Derivatives, Fair Value [Line Items]
Liability Derivatives, Notional Amount	476,000	0
Liability Derivatives, Fair Value	3,000	0
Not Designated as Hedging Instrument | Other
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	155,206,000	76,755,000
Asset Derivatives, Fair Value	1,601,000	211,000
Liability Derivatives, Notional Amount	485,375,000	374,688,000
Liability Derivatives, Fair Value	447,000	214,000
Not Designated as Hedging Instrument | Interest Rate Swap, CME
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	2,900,000,000	400,000,000
Liability Derivatives, Notional Amount	0	2,600,000,000
Not Designated as Hedging Instrument | Credit Risk Contract | RPA-Out
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	103,700,000	66,000,000
Not Designated as Hedging Instrument | Credit Risk Contract | RPA-In
Derivatives, Fair Value [Line Items]
Liability Derivatives, Notional Amount	464,700,000	338,200,000
Interest Rate Lock Commitments
Derivatives, Fair Value [Line Items]
Other commitment	$ 2,800,000	$ 1,000,000

Derivative Financial Instrume_4

Derivative Financial Instruments (Offsetting Derivatives) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Asset Derivatives, Fair Value, Less: Master netting agreements	$ 16,877	$ 6,364
Asset derivatives	16,648	133,481
Liability Derivatives, Fair Value, Less: Master netting agreements	16,877	6,364
Liability derivatives	409,900	13,301
Hedge Accounting Positions
Derivative [Line Items]
Asset Derivatives, Fair Value	219,245	25,636
Asset Derivatives, Fair Value, Less: Master netting agreements	16,877	6,364
Asset derivatives	185,968	19,272
Asset derivatives, amounts not offset	16,400	0
Asset derivatives, net amounts	16,771	51
Liability Derivatives, Fair Value	16,877	8,483
Liability Derivatives, Fair Value, Less: Master netting agreements	16,877	6,364
Liability derivatives	0	2,119
Liability derivatives, amounts not offset	0	0
Liability derivatives, net amounts	$ 852	$ 428

Derivative Financial Instrume_5

Derivative Financial Instruments (Income Statement Effect) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	$ 9,259	$ 3,376		$ 7,356
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)			$ 29,864
Interest Rate Derivatives | Operating Expense | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	6,032	2,727	25,291	7,132
Mortgage Banking Derivatives | Operating Expense | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	31	38	(47)	(556)
Other | Operating Expense | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	3,196	611	4,620	780
Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	(559)	2,616	3,091	7,599
Cash Flow Hedging | Interest Rate Derivatives | Operating Expense | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	(76)	(90)	(229)	(334)
Cash Flow Hedging | Interest Rate Derivatives | Other Income | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	$ (483)	$ 2,706	$ 3,320	$ 7,933

Derivative Financial Instrume_6

Derivative Financial Instruments Impact of Fair Value Hedging Adjustment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Hedge basis adjustment	$ 334,796	$ 338,811
Long-term Debt
Derivative Instruments, Gain (Loss) [Line Items]
Hedge basis adjustment	$ 34,796	$ 38,811

Derivative Financial Instrume_7

Derivative Financial Instruments (AOCI Related to Cash Flow Hedges) (Narrative) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Unamortized balance	$ 3.5
Maximum length of time over which forecasted transactions are hedged	4 years 6 months
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Estimate of amount to be reclassified from AOCL	$ 0.3
Remaining unamortized gain (loss) on termination of cash flow hedges	(0.4)
Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Estimate of amount to be reclassified from AOCL	$ 2.8

Derivative Financial Instrume_8

Derivative Financial Instruments (Counterparty Credit Risk Narrative) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative instrument asset, Amount Offset	$ 185,968	$ 19,272
Maximum exposure	200
Debit (credit) valuation adjustment	9,500	$ (400)
Cash and Due from Banks
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash	186,800
Valuation, Market Approach
Derivative [Line Items]
Maximum exposure	85,900
CME
Derivative [Line Items]
Derivative instrument asset, Amount Offset	$ 64,800

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Remaining unfunded commitment	$ 1,193	$ 1,193		$ 5,975
Unused commitments to extend credit	11,249,612	11,249,612		$ 7,152,331
Transfer of loans and leases to loans-held-for-sale		621,922	$ 74,923
Loans in process of foreclosure	9,700	9,700
Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	2,100	2,100
Rabbi Trust
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	10,300	10,300
Alternative investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	76,100	76,100
Carrying amount of alternative investments	500	500
Remaining unfunded commitment	0	0
Write-down	200	1,400
Alternative investments carrying amount	75,200	75,200
Alternative investments | Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unused commitments to extend credit	31,100	31,100
Unused commitments to extend credit, written up	$ 500	$ 500

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Option, Disclosures) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]
Originated loans held for sale, fair value	$ 898	$ 4,694
Originated loans held for sale, unpaid principal balance	898	4,694
Originated loans held for sale, difference	(182)	(340)
loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Originated loans held for sale, unpaid principal balance	$ 1,080	$ 5,034

Fair Value Measurements (Fair_2

Fair Value Measurements (Fair Value Assets And Liabilities Measured On Recurring and Nonrecurring Basis) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financial Assets:
Total available-for-sale investment securities	$ 8,085,044	$ 4,234,854
Asset derivatives	16,648	133,481
Value under fair value options	898	4,694
Financial Liabilities:
Liability derivatives	409,900	13,301
U.S. Treasury notes
Financial Assets:
Total available-for-sale investment securities	713,263	396,966
Government agency debentures
Financial Assets:
Total available-for-sale investment securities	269,028
Municipal bonds and notes
Financial Assets:
Total available-for-sale investment securities	1,697,145
Agency CMO
Financial Assets:
Total available-for-sale investment securities	63,861	90,384
Agency MBS
Financial Assets:
Total available-for-sale investment securities	2,197,349	1,593,403
Agency CMBS
Financial Assets:
Total available-for-sale investment securities	1,455,919	1,232,541
Non-agency CMBS
Financial Assets:
Total available-for-sale investment securities	922,928	886,263
CLO
Financial Assets:
Total available-for-sale investment securities	7,203	21,847
Corporate debt securities
Financial Assets:
Total available-for-sale investment securities	702,172	13,450
Private label MBS
Financial Assets:
Total available-for-sale investment securities	44,310
Other
Financial Assets:
Total available-for-sale investment securities	11,866
Fair Value, Recurring
Financial Assets:
Total available-for-sale investment securities	8,085,044	4,234,854
Alternative investments	75,728	27,732
Total financial assets	8,393,413	4,429,813
Financial Liabilities:
Liability derivatives	426,777	21,784
Fair Value, Recurring | Level 1
Financial Assets:
Total available-for-sale investment securities	713,263	396,966
Alternative investments	522	1,877
Total financial assets	727,626	402,446
Financial Liabilities:
Liability derivatives	296	141
Fair Value, Recurring | Level 2
Financial Assets:
Total available-for-sale investment securities	7,371,781	3,837,888
Alternative investments	0	0
Total financial assets	7,590,581	4,001,512
Financial Liabilities:
Liability derivatives	426,481	21,643
Fair Value, Recurring | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Alternative investments	0	0
Total financial assets	0	0
Financial Liabilities:
Liability derivatives	0	0
Fair Value, Recurring | Derivative instruments
Financial Assets:
Asset derivatives	219,493	159,117
Fair Value, Recurring | Derivative instruments | Level 1
Financial Assets:
Asset derivatives	1,591	187
Fair Value, Recurring | Derivative instruments | Level 2
Financial Assets:
Asset derivatives	217,902	158,930
Fair Value, Recurring | Derivative instruments | Level 3
Financial Assets:
Asset derivatives	0	0
Fair Value, Recurring | Loan Origination Commitments
Financial Assets:
Value under fair value options	898	4,694
Fair Value, Recurring | Loan Origination Commitments | Level 1
Financial Assets:
Value under fair value options	0	0
Fair Value, Recurring | Loan Origination Commitments | Level 2
Financial Assets:
Value under fair value options	898	4,694
Fair Value, Recurring | Loan Origination Commitments | Level 3
Financial Assets:
Value under fair value options	0	0
Fair Value, Recurring | Investments Held In Rabbi Trust
Financial Assets:
Other assets	12,250	3,416
Fair Value, Recurring | Investments Held In Rabbi Trust | Level 1
Financial Assets:
Other assets	12,250	3,416
Fair Value, Recurring | Investments Held In Rabbi Trust | Level 2
Financial Assets:
Other assets	0	0
Fair Value, Recurring | Investments Held In Rabbi Trust | Level 3
Financial Assets:
Other assets	0	0
Fair Value, Recurring | U.S. Treasury notes
Financial Assets:
Total available-for-sale investment securities	713,263	396,966
Fair Value, Recurring | U.S. Treasury notes | Level 1
Financial Assets:
Total available-for-sale investment securities	713,263	396,966
Fair Value, Recurring | U.S. Treasury notes | Level 2
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | U.S. Treasury notes | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Government agency debentures
Financial Assets:
Total available-for-sale investment securities	269,028
Fair Value, Recurring | Government agency debentures | Level 1
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Government agency debentures | Level 2
Financial Assets:
Total available-for-sale investment securities	269,028
Fair Value, Recurring | Government agency debentures | Level 3
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Municipal bonds and notes
Financial Assets:
Total available-for-sale investment securities	1,697,145
Fair Value, Recurring | Municipal bonds and notes | Level 1
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Municipal bonds and notes | Level 2
Financial Assets:
Total available-for-sale investment securities	1,697,145
Fair Value, Recurring | Municipal bonds and notes | Level 3
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Agency CMO
Financial Assets:
Total available-for-sale investment securities	63,861	90,384
Fair Value, Recurring | Agency CMO | Level 1
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Agency CMO | Level 2
Financial Assets:
Total available-for-sale investment securities	63,861	90,384
Fair Value, Recurring | Agency CMO | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Agency MBS
Financial Assets:
Total available-for-sale investment securities	2,197,349	1,593,403
Fair Value, Recurring | Agency MBS | Level 1
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Agency MBS | Level 2
Financial Assets:
Total available-for-sale investment securities	2,197,349	1,593,403
Fair Value, Recurring | Agency MBS | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Agency CMBS
Financial Assets:
Total available-for-sale investment securities	1,455,919	1,232,541
Fair Value, Recurring | Agency CMBS | Level 1
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Agency CMBS | Level 2
Financial Assets:
Total available-for-sale investment securities	1,455,919	1,232,541
Fair Value, Recurring | Agency CMBS | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Non-agency CMBS
Financial Assets:
Total available-for-sale investment securities	922,928	886,263
Fair Value, Recurring | Non-agency CMBS | Level 1
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Non-agency CMBS | Level 2
Financial Assets:
Total available-for-sale investment securities	922,928	886,263
Fair Value, Recurring | Non-agency CMBS | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | CLO
Financial Assets:
Total available-for-sale investment securities	7,203	21,847
Fair Value, Recurring | CLO | Level 1
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | CLO | Level 2
Financial Assets:
Total available-for-sale investment securities	7,203	21,847
Fair Value, Recurring | CLO | Level 3
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Corporate debt securities
Financial Assets:
Total available-for-sale investment securities	702,172	13,450
Fair Value, Recurring | Corporate debt securities | Level 1
Financial Assets:
Total available-for-sale investment securities	0	0
Fair Value, Recurring | Corporate debt securities | Level 2
Financial Assets:
Total available-for-sale investment securities	702,172	13,450
Fair Value, Recurring | Corporate debt securities | Level 3
Financial Assets:
Total available-for-sale investment securities	0	$ 0
Fair Value, Recurring | Private label MBS
Financial Assets:
Total available-for-sale investment securities	44,310
Fair Value, Recurring | Private label MBS | Level 1
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Private label MBS | Level 2
Financial Assets:
Total available-for-sale investment securities	44,310
Fair Value, Recurring | Private label MBS | Level 3
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Other
Financial Assets:
Total available-for-sale investment securities	11,866
Fair Value, Recurring | Other | Level 1
Financial Assets:
Total available-for-sale investment securities	0
Fair Value, Recurring | Other | Level 2
Financial Assets:
Total available-for-sale investment securities	11,866
Fair Value, Recurring | Other | Level 3
Financial Assets:
Total available-for-sale investment securities	$ 0

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Estimated Fair Values Of Significant Financial Instruments) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 5,650,119		$ 6,280,936
Mortgage servicing assets, Carrying Amount	9,837	$ 8,592	9,237	$ 10,167	$ 11,501	$ 13,422
Fair Value, Nonrecurring | Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	613,125		461,570
Held-to-maturity investment securities	6,505,838		6,198,125
Loans and leases, net	47,249,550		21,970,542
Securities sold under agreements to repurchase and other borrowings	1,265,414		674,896
FHLB advances	3,510,717		10,997
Long-term debt	1,074,844		562,931
Fair Value, Nonrecurring | Reported Value Measurement | Deposits Liabilities, other than time deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits	51,439,293		28,049,259
Fair Value, Nonrecurring | Reported Value Measurement | Time Deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits	2,569,594		1,797,770
Fair Value, Nonrecurring | Reported Value Measurement | Residential
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage servicing assets, Carrying Amount	9,837		9,237
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	613,125		461,570
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	5,650,119		6,280,936
Securities sold under agreements to repurchase and other borrowings	1,243,251		676,581
FHLB advances	3,509,221		11,490
Long-term debt	1,030,390		515,912
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases, net	45,896,000		21,702,732
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Deposits Liabilities, other than time deposits | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits	51,439,293		28,049,259
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Time Deposits | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits	2,503,396		1,794,829
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Residential | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage servicing assets, Fair value	$ 27,550		$ 12,527

Retirement Benefit Plans (Detai

Retirement Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jan. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected long-term rate of return			5.50%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	1,441	1,166	4,198	3,498
Expected return on plan assets	(3,669)	(3,595)	(11,006)	(10,786)
Amortization of actuarial loss (gain)	821	1,019	1,667	3,058
Net periodic benefit (income) cost	(1,407)	(1,410)	(5,141)	(4,230)
Pension Plan | Sterling
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations assumed					$ 30,500
SERP
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	17	7	49	20
Expected return on plan assets	0	0	0	0
Amortization of actuarial loss (gain)	7	8	20	25
Net periodic benefit (income) cost	24	15	69	45
OPEB
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	0	24	0
Interest cost	194	4	551	12
Expected return on plan assets	0	0	0	0
Amortization of actuarial loss (gain)	7	(20)	(30)	(60)
Net periodic benefit (income) cost	$ 210	$ (16)	$ 545	$ (48)

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) Segment	Jan. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	3
Deposits	$ 54,008,887			$ 29,847,029
Goodwill	$ 2,513,771			$ 538,373	$ 538,373	$ 538,373
Sterling
Segment Reporting Information [Line Items]
Goodwill		$ 1,939,432	$ 1,900,000
Commercial Banking | Sterling
Segment Reporting Information [Line Items]
Goodwill		1,700,000
Consumer Banking
Segment Reporting Information [Line Items]
Deposits			125,400
Consumer Banking | Assets Under Administration
Segment Reporting Information [Line Items]
Off-balance sheet assets			4,300,000
Consumer Banking | Sterling
Segment Reporting Information [Line Items]
Goodwill		$ 200
HSA Bank | Bend
Segment Reporting Information [Line Items]
Goodwill			$ 36,000

Segment Reporting (Operating Re

Segment Reporting (Operating Results and Total Assets Reportable Segments) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Goodwill	$ 2,513,771	$ 538,373	$ 2,513,771	$ 538,373	$ 538,373	$ 538,373
Assets	69,052,566		69,052,566		34,915,599
Net interest income	551,003	229,691	1,431,911	674,307
Non-interest income	113,636	83,775	338,604	233,234
Non-interest expense	330,071	180,237	1,048,083	555,247
Pre-tax, pre-provision net revenue	334,568	133,229	722,432	352,294
Provision (benefit) for credit losses	36,531	7,750	237,619	(39,500)
Income (loss) before income taxes	298,037	125,479	484,813	391,794
Income tax expense	64,069	29,766	85,281	93,968
Net income	233,968	95,713	399,532	297,826
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Goodwill	1,865,887		1,865,887		131,000
Assets	40,907,410		40,907,410		15,398,159
Net interest income	333,554	152,012	954,044	434,087
Non-interest income	40,497	22,782	128,670	59,536
Non-interest expense	102,415	50,244	294,375	142,803
Pre-tax, pre-provision net revenue	271,636	124,550	788,339	350,820
Provision (benefit) for credit losses	33,341	5,099	238,054	(37,602)
Income (loss) before income taxes	238,295	119,451	550,285	388,422
Income tax expense	59,574	30,579	133,966	99,436
Net income	178,721	88,872	416,319	288,986
Operating Segments | HSA Bank
Segment Reporting Information [Line Items]
Goodwill	57,779		57,779		21,813
Assets	122,112		122,112		73,564
Net interest income	58,567	42,074	152,702	126,376
Non-interest income	25,842	24,756	79,352	78,315
Non-interest expense	36,725	32,374	110,674	100,802
Pre-tax, pre-provision net revenue	47,684	34,456	121,380	103,889
Provision (benefit) for credit losses	0	0	0	0
Income (loss) before income taxes	47,684	34,456	121,380	103,889
Income tax expense	12,779	9,199	32,530	27,738
Net income	34,905	25,257	88,850	76,151
Operating Segments | Consumer Banking
Segment Reporting Information [Line Items]
Goodwill	590,105		590,105		385,560
Assets	10,120,063		10,120,063		7,663,921
Net interest income	195,748	98,572	511,712	281,012
Non-interest income	33,842	24,292	92,541	71,262
Non-interest expense	109,588	73,212	312,464	222,672
Pre-tax, pre-provision net revenue	120,002	49,652	291,789	129,602
Provision (benefit) for credit losses	(1,989)	2,799	(5,906)	(1,833)
Income (loss) before income taxes	121,991	46,853	297,695	131,435
Income tax expense	31,718	11,151	77,352	31,282
Net income	90,273	35,702	220,343	100,153
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Goodwill	0		0		0
Assets	17,902,981		17,902,981		$ 11,779,955
Net interest income	(36,866)	(62,967)	(186,547)	(167,168)
Non-interest income	13,455	11,945	38,041	24,121
Non-interest expense	81,343	24,407	330,570	88,970
Pre-tax, pre-provision net revenue	(104,754)	(75,429)	(479,076)	(232,017)
Provision (benefit) for credit losses	5,179	(148)	5,471	(65)
Income (loss) before income taxes	(109,933)	(75,281)	(484,547)	(231,952)
Income tax expense	(40,002)	(21,163)	(158,567)	(64,488)
Net income	$ (69,931)	$ (54,118)	$ (325,980)	$ (167,464)

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 70,096	$ 52,739	$ 205,821	$ 159,327
Non-interest income	113,636	83,775	338,604	233,234
Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	50,807	40,258	150,019	122,166
Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	5,623		16,198
Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	11,419	9,985	33,260	29,475
Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,247	2,496	6,344	7,686
Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	43,540
Non-interest income		31,036	132,783	73,907
Operating Segments | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	15,868	7,273	46,679	21,429
Non-interest income	40,497	22,782	128,670	59,536
Operating Segments | Commercial Banking | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7,573	4,206	21,905	12,400
Operating Segments | Commercial Banking | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	5,623		16,198
Operating Segments | Commercial Banking | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,672	3,067	8,576	9,029
Operating Segments | Commercial Banking | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Operating Segments | Commercial Banking | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	24,629
Non-interest income		15,509	81,991	38,107
Operating Segments | HSA Bank
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	25,842	24,756	79,352	78,315
Non-interest income	25,842	24,756	79,352	78,315
Operating Segments | HSA Bank | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	24,008	22,886	74,091	72,382
Operating Segments | HSA Bank | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0		0
Operating Segments | HSA Bank | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Operating Segments | HSA Bank | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,834	1,870	5,261	5,933
Operating Segments | HSA Bank | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0
Non-interest income		0	0	0
Operating Segments | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	27,897	20,631	78,846	59,352
Non-interest income	33,842	24,292	92,541	71,262
Operating Segments | Consumer Banking | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	18,728	13,079	53,057	37,127
Operating Segments | Consumer Banking | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0		0
Operating Segments | Consumer Banking | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	8,756	6,926	24,706	20,472
Operating Segments | Consumer Banking | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	413	626	1,083	1,753
Operating Segments | Consumer Banking | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	5,945
Non-interest income		3,661	13,695	11,910
Corporate, Non-Segment
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	489	79	944	231
Non-interest income	13,455	11,945	38,041	24,121
Corporate, Non-Segment | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	498	87	966	257
Corporate, Non-Segment | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0		0
Corporate, Non-Segment | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	(9)	(8)	(22)	(26)
Corporate, Non-Segment | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Corporate, Non-Segment | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 12,966
Non-interest income		$ 11,866	$ 37,097	$ 23,890

Commitments and Contingencies_2

Commitments and Contingencies (Outstanding Financial Instruments Contract Amounts Represent Credit Risk) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 11,249,612	$ 7,152,331
Standby letter of credit
Loss Contingencies [Line Items]
Unused commitments to extend credit	382,988	224,061
Commercial letter of credit
Loss Contingencies [Line Items]
Unused commitments to extend credit	57,368	58,175
Commitments to extend credit
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 10,809,256	$ 6,870,095

Commitments and Contingencies_3

Commitments and Contingencies (Reserve for Unfunded Commitments) (Detail) - SEC Schedule, 12-09, Allowance, Credit Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	$ 20,149	$ 11,974	$ 13,104	$ 12,755
ACL assumed from Sterling	0	0	6,749	0
Provision (benefit) for credit losses	5,180	196	5,476	(585)
Balance, end of period	$ 25,329	$ 12,170	$ 25,329	$ 12,170