Webster Financial (WBS) 10-K 25 Feb 22 2021 FY Annual report Financial data

Cover

Cover - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2021
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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 4,800,000
Entity Common Stock, Shares Outstanding		179,590,244
Amendment Flag	false
Entity Central Index Key	0000801337
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Documents Incorporated by Reference	Part III: Definitive Proxy Statement (the “Proxy Statement”) for the Annual Meeting of Shareholders to be held on April 28, 2022
ICFR Auditor Attestation Flag	true
Common Class A [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
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 [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
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 | NEW YORK STOCK EXCHANGE, INC. [Member]
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

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Name	KPMG LLP
Auditor Firm ID	185
Auditor Location	Hartford, Connecticut

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets:
Cash and due from banks	$ 137,385	$ 193,501
Interest-bearing deposits	324,185	69,603
Investment securities available-for-sale, at fair value	4,234,854	3,326,776
Investment securities held-to-maturity, net of allowance for credit losses of $214 and $299	6,198,125	5,567,889
Federal Home Loan Bank and Federal Reserve Bank stock	71,836	77,594
Loans held for sale (valued under fair value option $4,694 and $14,000)	4,694	14,012
Loans and leases	22,271,729	21,641,215
Allowance for credit losses on loan and leases	(301,187)	(359,431)
Loans and leases, net	21,970,542	21,281,784
Deferred tax assets, net	109,405	81,286
Property and equipment, net	204,557	226,743
Goodwill	538,373	538,373
Other intangible assets, net	17,869	22,383
Cash surrender value of life insurance policies	572,305	564,195
Accrued interest receivable and other assets	531,469	626,551
Total assets	34,915,599	32,590,690
Liabilities and shareholders' equity:
Non-interest-bearing	7,060,488	6,155,592
Interest-bearing	22,786,541	21,179,844
Total deposits	29,847,029	27,335,436
Securities sold under agreements to repurchase and other borrowings	674,896	995,355
Federal Home Loan Bank advances	10,997	133,164
Long-term debt	562,931	567,663
Operating Lease, Liability	144,804	158,280
Accrued expenses and other liabilities	236,617	166,167
Total liabilities	31,477,274	29,356,065
Shareholders’ equity:
Common stock	937	937
Paid-in capital	1,108,594	1,109,532
Retained earnings	2,333,288	2,077,522
Treasury stock, at cost (3,102,690 and 3,487,389 shares)	(126,951)	(140,659)
Accumulated other comprehensive (loss) income, net of tax	(22,580)	42,256
Total shareholders' equity	3,438,325	3,234,625
Total liabilities and shareholders' equity	34,915,599	32,590,690
Series F Preferred Stock [Member]
Shareholders’ equity:
Preferred stock	$ 145,037	$ 145,037

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 214	$ 299
Loans Held-for-sale, Fair Value Disclosure	$ 4,694	$ 14,000
Value per share (in dollars per share)	$ 0.01
Preferred stock, shares authorized	3,000,000
Preferred Stock, Shares Outstanding	6,000
Preferred Stock, Shares Issued	6,000
Common stock par value (in usd per share)	$ 0.01
Common Stock, Shares Authorized	200,000,000
Common stock, shares issued	93,686,311
Treasury Stock, Common, Shares	3,102,690	3,487,389

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest Income:
Interest and fees on loans and leases	$ 762,713	$ 789,719	$ 924,693
Taxable interest and dividends on securities	159,001	189,683	207,294
Non-taxable interest on securities	20,884	21,878	21,869
Loans held for sale	246	769	727
Interest income	942,844	1,002,049	1,154,583
Interest Expense:
Deposits	20,131	67,897	129,577
Securities sold under agreements to repurchase and other borrowings	3,040	5,941	17,953
Federal Home Loan Bank advances	1,708	18,767	31,399
Long-term debt	16,876	18,051	20,527
Interest expense	41,755	110,656	199,456
Net interest income	901,089	891,393	955,127
(Benefit) provision for credit losses	(54,500)	137,750	37,800
Net interest income (loss) after provision for loan and lease losses	955,589	753,643	917,327
Non-interest Income:
Deposit service fees	162,710	156,032	168,022
Loan and lease related fees	36,658	29,127	31,327
Wealth and investment services	39,586	32,916	32,932
Mortgage banking activities	6,219	18,295	6,115
Increase in cash surrender value of life insurance policies	14,429	14,561	14,612
Net (gain) on sale of investment securities	0	8	29
Other income	63,770	34,338	32,278
Total non-interest income	323,372	285,277	285,315
Non-interest Expense:
Compensation and benefits	419,989	428,391	395,402
Occupancy	55,346	71,029	57,181
Technology and equipment	112,831	112,273	105,283
Intangible assets amortization	4,513	4,160	3,847
Marketing	12,051	14,125	16,286
Professional and outside services	47,235	32,424	21,380
Deposit insurance	15,794	18,316	17,954
Other expense	77,341	78,228	98,617
Total non-interest expense	745,100	758,946	715,950
Income before income tax expense	533,861	279,974	486,692
Income tax expense	124,997	59,353	103,969
Net income	408,864	220,621	382,723
Preferred stock dividends	(7,875)	(7,875)	(7,875)
Net income available to common shareholders, basic	400,989	212,746	374,848
Net income available to common shareholders, diluted	$ 400,989	$ 212,746	$ 374,848
Earnings per common share:
Earnings per common share, Basic (in dollars per share)	$ 4.43	$ 2.35	$ 4.07
Earnings per common share, Diluted (in dollars per share)	$ 4.42	$ 2.35	$ 4.06

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other comprehensive (loss) income, net of tax:
Net income	$ 408,864	$ 220,621	$ 382,723
Investment securities available-for-sale	(62,888)	50,173	88,625
Derivative instruments	(13,848)	29,102	129
Total defined benefit pension and postretirement benefit plans	11,900	(947)	5,826
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Comprehensive income	$ 344,028	$ 298,949	$ 477,303

Consolidated Statement of Share

Consolidated Statement of Shareholder Equity Statement - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Series E Preferred Stock [Member]	Series F Preferred Stock [Member]	Common Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]Series E Preferred Stock [Member]	Retained Earnings [Member]Series F Preferred Stock [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Beginning Balance at Dec. 31, 2018	$ 2,886,515					$ 145,037	$ 937	$ 1,114,394	$ 1,828,303				$ (71,504)	$ (130,652)
Beginning Balance (Accountign Standards Update 2017-08 and 2016-01) at Dec. 31, 2018		$ (513)								$ (513)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	382,723								382,723
Other Comprehensive Income (Loss), Net of Tax	94,580													94,580
Dividends, Common Stock	(141,286)							0	(141,286)
Dividends, Preferred Stock			$ (7,875)								$ (7,875)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	12,626							885	0				11,741
Stock Issued During Period, Value, Stock Options Exercised	619							(2,029)					2,648
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(6,616)												(6,616)
Stock Repurchased During Period, Value	(13,003)												(13,003)
Ending Balance at Dec. 31, 2019	$ 3,207,770	$ (51,213)				145,037	937	1,113,250	2,061,352	$ (51,213)			(76,734)	(36,072)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared					$ 1.53
Preferred Stock, Dividends Per Share, Declared			$ 1,312.5
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-02 [Member]
Net income	$ 220,621								220,621
Other Comprehensive Income (Loss), Net of Tax	78,328													78,328
Dividends, Common Stock	(145,363)								(145,363)
Dividends, Preferred Stock				$ (7,875)								$ (7,875)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	12,179							(3,524)					15,703
Stock Issued During Period, Value, Stock Options Exercised	240							(194)					434
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(3,506)												(3,506)
Stock Repurchased During Period, Value	(76,556)												(76,556)
Ending 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]
Common Stock, Dividends, Per Share, Declared					1.60
Preferred Stock, Dividends Per Share, Declared				$ 1,312.5
Net income	408,864								408,864
Other Comprehensive Income (Loss), Net of Tax	(64,836)													(64,836)
Dividends, Common Stock	(145,223)								(145,223)
Dividends, Preferred Stock				$ (7,875)								$ (7,875)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	13,662							4,235					9,427
Stock Issued During Period, Value, Stock Options Exercised	3,492							(5,173)					8,665
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(4,384)												(4,384)
Ending 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]
Common Stock, Dividends, Per Share, Declared					$ 1.60
Preferred Stock, Dividends Per Share, Declared				$ 1,312.5

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities:
Net income	$ 408,864	$ 220,621	$ 382,723
Adjustments to reconcile net income to net cash provided by operating activities:
(Benefit) provision for credit losses	(54,500)	137,750	37,800
Deferred tax expense (benefit)	(4,998)	(31,236)	927
Depreciation and amortization	35,913	36,616	37,507
Amortization of earning assets and funding premium/discount, net	133,069	75,929	49,731
Amortization of low-income housing tax credit investments	3,918	5,286	3,249
Amortization of mortgage servicing assets	5,593	6,562	7,318
Stock-based compensation	13,662	12,179	12,626
Gain on sale, net of write-down, on foreclosed and repossessed assets	(744)	(1,938)	(729)
Loss (gain) on sale, net of write-down, on premises and equipment	(1,236)	1,105	1,340
Net (gain) on sale of investment securities	0	(8)	(29)
Increase in cash surrender value of life insurance policies	(14,429)	(14,561)	(14,612)
Gain from life insurance policies	(4,402)	(1,219)	(4,933)
Net (gain) on mortgage banking activities	(5,912)	(15,305)	(4,031)
Net (gain) on sale of loans not originated for sale	(3,862)	(301)	(667)
Proceeds from sale of loans held for sale	247,634	486,341	216,239
Originations of loans held for sale	(235,066)	(449,803)	(240,305)
Net decrease (increase) in derivative contract assets net of liabilities	173,506	(118,336)	(123,752)
Net (increase) decrease in accrued interest receivable and other assets	(69,263)	11,120	(35,774)
Net (decrease) increase in accrued expenses and other liabilities	38,064	(8,121)	(23,257)
Net cash provided by operating activities	688,592	380,549	303,850
Investing Activities:
Purchases of available-for-sale securities	(1,957,562)	(990,904)	(549,541)
Proceeds from maturities and principal payments of available-for-sale securities	935,621	627,577	556,283
Proceeds from sales of available-for-sale securities	0	8,963	70,087
Purchases of held-to-maturity securities	(1,968,133)	(1,297,535)	(1,571,604)
Proceeds from maturities and principal payments of held-to-maturity securities	1,288,140	983,864	573,703
Net proceeds from (purchase of) Federal Home Loan Bank stock	5,758	71,452	240
Purchases of intercompany debt securities	(11,361)	(12,244)	(6,065)
Net (increase) in loans	(773,443)	(1,681,947)	(1,642,501)
Proceeds from loans not originated for sale	82,187	9,197	20,931
Proceeds from life insurance policies	5,074	1,885	12,866
Proceeds from the sale of foreclosed properties and repossessed assets	1,998	11,497	11,562
Proceeds from the sale of premises and equipment	3,221	866	0
Additions to premises and equipment	(16,589)	(21,280)	(25,717)
Net cash provided by (used for) investing activities	(2,405,089)	(2,288,609)	(2,549,756)
Financing Activities:
Net increase in deposits	2,511,163	4,006,319	1,465,377
Proceeds from Federal Home Loan Bank advances	180,470	3,850,000	9,200,000
Repayments of Federal Home Loan Bank advances	(302,637)	(5,665,312)	(9,078,332)
Net (decrease) increase in securities sold under agreements to repurchase and other borrowings	(320,459)	(45,076)	458,557
Proceeds from the issuance of long-term debt	0	0	300,000
Debt issuance costs	0	0	(3,642)
Dividends paid to common shareholders	(144,807)	(144,965)	(140,783)
Dividends paid to preferred shareholders	(7,875)	(7,875)	(7,875)
Exercise of stock options	3,492	240	619
Common stock repurchased	0	(76,556)	(13,003)
Common shares acquired related to stock compensation plan activity	(4,384)	(3,506)	(6,616)
Net cash (used for) provided by financing activities	1,914,963	1,913,269	2,174,302
Net (decrease) increase in cash and cash equivalents	198,466	5,209	(71,604)
Cash and cash equivalents at beginning of year	263,104	257,895	329,499
Cash and cash equivalents at end of year	461,570	263,104	257,895
Supplemental disclosure of cash flow information:
Interest paid	42,151	118,123	197,200
Income taxes paid	112,587	94,072	110,057
Noncash investing and financing activities:
Transfer of loans and leases to foreclosed properties and repossessed assets	1,757	5,394	10,440
Transfer of loans from portfolio to loans held for sale	78,316	8,578	16,609
Deposits assumed	0	4,657	0
Operating Lease, Right-of-Use Asset	119,926	127,481	157,234
Operating Lease, Liability	144,804	158,280	178,802
Increase (Decrease) in Leasing Receivables	$ (22,781)	$ (27,868)	$ (2,479)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
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. It also offers equipment financing, commercial real estate lending, asset-based lending, and treasury and payment solutions, primarily in the eastern U.S. HSA Bank is a leading provider of HSAs, and also 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 accompanying consolidated financial statements have been prepared in accordance with GAAP, and include the accounts of Webster Financial Corporation and all other entities in which the Company has a controlling financial interest. Intercompany transactions and balances have been eliminated in consolidation. Assets that the Company holds or manages in a fiduciary or agency capacity for customers, referred to as assets under administration or assets under management, are not included on the accompanying Consolidated Balance Sheets. Certain prior period amounts have been reclassified to conform to the current year's presentation. These reclassifications did not have a significant impact on the Company's consolidated financial statements. Principles of Consolidation The purpose of consolidated financial statements is to present the results of operations and the financial position of the Company and its subsidiaries as if the consolidated group were a single economic entity. In accordance with the applicable accounting guidance for consolidations, the consolidated financial statements include any voting interest entity (VOE) in which the Company has a controlling financial interest and any variable interest entity (VIE) for which the Company is deemed to be the primary beneficiary. The Company generally consolidates its VOEs if the Company, directly or indirectly, owns more than 50% of the outstanding voting shares of the entity and the non-controlling shareholders do not hold any substantive participating or controlling rights. The Company evaluates VIEs to understand the purpose and design of the entity, and its involvement in the ongoing activities of the VIE, and will consolidate the VIE if it has (i) the power to direct the activities of the VIE that most significantly affect the VIE's economic performance, and (ii) an obligation to absorb losses of the VIE, or the right to receive benefits from the VIE, that could potentially be significant to the VIE. The Company accounts for unconsolidated partnerships and certain other investments using the equity method of accounting if it has the ability to significantly influence the operating and financial policies of the investee. This is generally presumed to exist when the Company owns between 20% and 50% of a corporation, or when it has greater than 3% to 5% interest in a limited partnership or similarly structured entity. Additional information regarding consolidated and unconsolidated VIEs can be found within Note 2: Variable Interest Entities. 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. Cash and Cash Equivalents Cash and cash equivalents is comprised of cash and due from banks and interest-bearing deposits. Cash equivalents have a maturity of three months or less. Cash and due from banks includes cash on hand, certain deposits at the FRB of Boston, and cash due from banks. Restricted cash related to Federal Reserve System requirements and cash collateral received on derivative positions are included in cash and due from banks. Interest-bearing deposits includes deposits at the FRB of Boston in excess of reserve requirements, if any, and federal funds sold to other financial institutions. Federal funds sold essentially represents an uncollateralized loan. Therefore, the Company regularly evaluates the credit risk associated with the other financial institutions to ensure that Webster does not become exposed to any significant credit risk on these cash equivalents. Investments in Debt Securities Debt security transactions are recognized on the trade date, which is the date the order to buy or sell the security is executed. Investments in debt securities are classified as available-for-sale or held-to-maturity at the time of purchase. Any classification change subsequent to the trade date is reviewed for compliance with corporate objectives and accounting policies. Debt securities classified as available-for-sale are recorded at fair value with unrealized gains and losses recorded as a component of other comprehensive income (OCI) or other comprehensive loss (OCL). If a debt security is transferred from available-for-sale to held-to-maturity, it is recorded at fair value at the time of transfer and any respective gain or loss would be recorded as a separate component of OCI or OCL and amortized as an adjustment to interest income over the remaining life of the security. Debt securities classified as available-for-sale are reviewed for credit losses when the fair value of a security falls below the amortized cost basis and the decline is evaluated to determine if any portion is attributable to credit loss. The decline in fair value attributable to credit loss is recorded directly to earnings, with a corresponding allowance for credit loss, limited to the amount that fair value is less than the amortized cost. If the credit quality subsequently improves, previously recorded allowance amounts may be reversed. An available-for-sale debt security will be placed on non-accrual status if collection of principal and interest in accordance with contractual terms is doubtful. When the Company intends to sell an impaired available-for-sale debt security, or if it is more likely than not that the Company will be required to sell the security prior to recovery of the amortized cost basis, the entire fair value adjustment will immediately be recognized in earnings through non-interest income. The gain or loss on sale is calculated using the carrying value plus any related accumulated OCI or OCL balance associated with the securities sold. Debt securities classified as held-to-maturity are those in which Webster has the ability and intent to hold to maturity. Debt securities classified as held-to-maturity are recorded at amortized cost net of unamortized premiums and discounts. Discount accretion income and premium amortization expense are recognized as interest income using the effective interest method, with consideration given to prepayment assumptions on mortgage backed securities. Premiums are amortized to the earliest call date for debt securities purchased at a premium, with explicit, non-contingent call features and are callable at a fixed price and preset date. Debt securities classified as held-to-maturity are reviewed for credit losses under the CECL model with an allowance recorded on the balance sheet for expected lifetime credit losses. The ACL is calculated on a pooled basis using statistical models which include forecasted scenarios of future economic conditions. Forecasts revert to long-run loss rates implicitly through the economic scenario, generally over three years. If the risk for a particular security no longer matches the collective assessment pool, it is removed and individually assessed for credit deterioration. The non-accrual policy for held-to-maturity debt securities is the same as for available-for-sale debt securities. A zero credit loss assumption is maintained for U.S. Treasuries and agency-backed securities in both the available-for-sale and held-to-maturity portfolios, as applicable. This assumption is subject to quarterly review to ensure it remains appropriate. Additional information regarding investments in debt securities can be found within Note 4: Investment Securities. Investments in Equity Securities The Company’s accounting treatment for unconsolidated equity investments differs for those with and without readily determinable fair values. Equity investments with readily determinable fair values are recorded at fair value with changes in fair value recorded in non-interest income. For equity investments without readily determinable fair values, the Company elected the measurement alternative, and therefore carries these investments at cost, less impairment, if any, plus or minus changes in observable prices. Certain equity investments that do not have a readily available fair value may qualify for net asset value (NAV) measurement based on specific requirements. The Company's alternative investments accounted for at NAV consist of investments in non-public entities that generally cannot be redeemed since the Company’s investments are distributed as the underlying equity is liquidated. On a quarterly basis, the Company reviews its equity investments without readily determinable fair values for impairment. If the equity investment is considered impaired, an impairment loss equal to the amount by which the carrying value exceeds its fair value is recorded through a charge to earnings. The impairment loss may be reversed in a subsequent period if there are observable transactions for the identical or similar investment of the same issuer at a higher amount than the carrying amount that was established when the impairment was recognized. Impairments, as well as upward or downward adjustments resulting from observable price changes in orderly transactions for identical or similar investments, are included in non-interest income. Equity investments in entities that finance affordable housing and other community development projects provide a return primarily through the realization of tax benefits. The Company applies the proportional amortization method to account for its investments in qualified affordable housing projects. Investment in Federal Home Loan Bank and Federal Reserve Bank Stock Webster Bank is a member of the FHLB and the Federal Reserve System, and is required to maintain an investment in capital stock of both the FHLB and FRB. Based on redemption provisions, FHLB and FRB stock has no quoted market value and is carried at cost. Membership stock is reviewed for impairment if economic circumstances would warrant review. Loans Held for Sale Loans that are classified as held for sale at the time of origination are accounted for under the fair value option. Loans not originated for sale but subsequently transferred to held for sale are valued at the lower of cost or fair value and are valued on an individual asset basis. Any cost amount in excess of fair value is recorded as a valuation allowance and recognized as a reduction of other non-interest income. Gains or losses on the sale of loans held for sale are recorded either as part of mortgage banking activities or other income. Cash flows from the sale of loans that were originated sale are presented as operating cash flows. Cash flows from the sale of loans originated for investment then subsequently transferred to held for sale are presented as investing cash flows. Additional information regarding mortgage banking activities and loans sold can be found within Note 6: Transfers and Servicing of Financial Assets. Transfers and Servicing of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is generally considered to have been surrendered when: (i) the transferred assets are legally isolated from the Company or its consolidated affiliates, even in bankruptcy or other receivership, (ii) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company, and (iii) the Company does not maintain the obligation or unilateral ability to reclaim or repurchase the assets. The Company sells financial assets in the normal course of business, the majority of which are residential mortgage loan sales, primarily to government-sponsored enterprises through established programs, commercial loan sales through participation agreements, and other individual or portfolio loan and securities sales. In accordance with accounting guidance for asset transfers, the Company considers any ongoing involvement with transferred assets in determining whether the assets can be derecognized from the balance sheet. With the exception of servicing, the Company’s continuing involvement with financial assets sold is minimal, and generally is limited to market customary representation and warranty clauses covering certain characteristics of the mortgage loans sold and the Company's origination process. The gain or loss on sale depends on the previous carrying amount of the transferred financial assets, the consideration received, and any other assets obtained or liabilities incurred in exchange for the transferred assets. When the Company sells financial assets, it may retain servicing rights and/or other interests in the financial assets. Servicing assets and any other interests held by the Company are recorded at fair value upon transfer, and subsequently carried at the lower of cost or fair value. Additional information regarding transfers of financial assets and mortgage servicing assets can be found within Note 6: Transfers and Servicing of Financial Assets. Loans and Leases Loans and leases are stated at the principal amount outstanding, net of amounts charged off, unearned income, unamortized premiums and discounts, and deferred loan and lease fees or costs, which are recognized as yield adjustments using the interest method. These yield adjustments are amortized over the contractual life of the related loans and leases and are adjusted for prepayments, as applicable. Interest on loans and leases is credited to interest income as earned based on the interest rate applied to principal amounts outstanding. Cash flows from loans and leases are presented as investing cash flows. Non-accrual Loans Loans and leases are placed on non-accrual status when collection of principal and interest in accordance with contractual terms is doubtful, which generally occurs when principal or interest payments become 90 days delinquent unless the loan or lease is well secured and in the process of collection, or sooner if circumstances indicate that the borrower may be unable to meet contractual principal or interest payments. Residential real estate loans, excluding loans fully insured against loss and in the process of collection, and consumer loans, are placed on non-accrual status at 90 days past due, or at the date when the Company is notified that the borrower is discharged in bankruptcy. Commercial non-mortgage, asset-based, commercial real estate, and equipment finance loans and leases are subject to a detailed review when they reach 90 days past due to determine accrual status, or when payment is uncertain and a specific consideration is made to put a loan or lease on non-accrual status. When loans and leases are placed on non-accrual status, the accrual of interest is discontinued, and any unpaid accrued interest is reversed and charged against interest income. If ultimate repayment of a non-accrual loan or lease is expected, any payments received are applied in accordance with contractual terms. If ultimate repayment is not expected on commercial non-mortgage, asset-based, commercial real estate, and equipment finance loans and leases, any payment received on a non-accrual loan or lease is applied to principal until the unpaid balance has been fully recovered. Any excess is then credited to interest income when received. If the Company determines, through a current valuation analysis, that principal can be recovered on residential real estate and consumer loans, interest payments are taken into income as received on a cash basis. Loans are generally removed from non-accrual status when they become current as to principal and interest or demonstrate a period of performance under contractual terms, and in the opinion of management, are fully collectible as to principal and interest. Pursuant to regulatory guidance, a loan discharged under Chapter 7 of the U.S. bankruptcy code is removed from non-accrual status when the bank expects full repayment of the remaining pre-discharged contractual principal and interest, and had at least six consecutive months of current payments. Additional information regarding non-accrual loans and leases can be found within Note 5: Loans and Leases. Allowance for Credit Losses on Loans and Leases The ACL on loans and leases is a contra-asset account that offsets the amortized cost basis of loans and leases for the credit losses that are expected to occur over the life of the asset. The ACL is established through a provision charged to expense. Executive management reviews and advises on the adequacy of the allowance, which is maintained at a level that management deems sufficient to be sufficient to cover expected credit losses within the loan and lease portfolios. The Company has elected to present accrued interest receivable separately from the amortized cost basis on the consolidated balance sheets and does not estimate an ACL on accrued interest as policies are in place to ensure timely write-offs and non-accruals. The ACL on loans and leases is determined using the CECL model, whereby an expected lifetime credit loss is recognized at the origination or purchase of an asset, including those acquired through a business combination, which is then reassessed at each reporting date over the contractual life of the asset. Generally, expected credit losses are determined through a pooled, collective assessment of loans and leases with similar risk characteristics. However, if the risk characteristics of a loan or lease change such that it no longer matches that of the collectively assessed pool, it is removed from the population and individually assessed for credit losses. The total ACL on loans and leases recorded by management represents the aggregated estimated credit loss determined through both the collective and individual assessments. Collectively Assessed Loans and Leases. Collectively assessed loans and leases are segmented based on product type, credit quality, risk ratings, and/or collateral types within its commercial and consumer portfolios, and expected losses are determined using a Probability of Default (PD), Loss Given Default (LGD), and Exposure at Default (EAD) framework. Expected credit losses are calculated as the product of the probability of a loan defaulting, expected loss given the occurrence of a default, and the expected exposure of a loan at default. Summing the product across loans over their lives yields the lifetime expected credit losses for a given portfolio. The Company’s PD and LGD calculations are predictive models that measure the current risk profile of the loan pools using forecasts of future macroeconomic conditions, historical loss information, and credit risk ratings. The Company employs a dual grade credit risk grading system for estimating the PD and the LGD for its commercial portfolio. 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 s 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 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. For its consumer portfolio, the Company considers factors such as past due status, updated FICO scores, employment status, collateral, geography, loans discharged in bankruptcy, and the status of first lien position loans on second lien position loans, as credit quality indicators. For portfolio monitoring purposes, the Company estimates the current value of property secured as collateral for home equity and residential first mortgage lending products on an ongoing basis. The estimate is based on home price indices compiled by the S&P/Case-Shiller Home Price Indices. Real estate price data is applied to the loan portfolios taking into account the age of the most recent valuation and geographic area. The Company’s models incorporate a single economic forecast scenario and macroeconomic assumptions over a two year reasonable and supportable forecast period. After the reasonable and supportable forecast period, the credit loss model gradually reverts to historical loss rates for the remaining life of the loans and leases on a straight-line basis over a one year reversion period. Historical loss rates are based on approximately 10 years of recently available data and are updated annually. The calculation of EAD follows an iterative process to determine the expected remaining principal balance of a loan based on historical paydown rates for loans of a similar segment within the same portfolio. The calculation of portfolio exposure in future quarters incorporates expected losses and principal paydowns (the combination of contractual repayments and voluntary prepayments). A portion of the collective ACL is comprised of qualitative adjustments for risk characteristics that are not reflected or captured in the quantitative models, but are likely to impact the measurement of estimated credit losses. Macroeconomic variables are used as inputs to the loss models and are selected based on the correlation of the variables to credit losses for each class of financing receivable as follows: the commercial model uses unemployment, gross domestic product, and retail sales (for commercial unfunded); the residential model uses the Case-Shiller Home Price Index; the home equity loan and line of credit models use interest rate spreads between U.S. Treasuries and corporate bonds and, in addition, the home equity loan model also uses the Federal Housing Finance Agency Home Price Index; and the personal loan and credit line models use the Case-Shiller Home Price Index and Federal Housing Finance Agency Home Price Index. There were no changes to the macroeconomic variables used in the loss models in the current year. Forecasted economic scenarios are sourced from a third party. Data from the baseline forecast scenario is used as the input to the modeled loss calculation. Changes in forecasts of macroeconomic variables will impact expectations of lifetime credit losses calculated by the loss models. However, the impact of changes in macroeconomic forecasts may be different for each portfolio and will reflect the credit quality and nature of the underlying assets at that time. To further refine the expected loss estimate, qualitative factors are used reflecting consideration of credit concentration, credit quality trends, the quality of internal loan reviews, the nature and volume of portfolio growth, staffing levels, underwriting exceptions, and other economic considerations that are not reflected in the base loss model. Management may apply additional qualitative adjustments to reflect other relevant facts and circumstances that impact expected credit losses. These economic and qualitative inputs are used to forecast expected losses over the reasonable and supportable forecast period. In addition to the above considerations, the ACL calculation includes expectations of prepayments and recoveries. Extensions, renewals, and modifications are not included in the collective assessment. However, if there is a reasonable expectation of a TDR, the loan is removed from the collective assessment pool and is individually assessed. Individually Assessed Loans and Leases. When loans and leases no longer match the risk characteristics of the collectively assessed pool, they are removed from the collectively assessed population and individually assessed for credit losses. Generally, all non-accrual loans, TDRs, potential TDRs, loans with a charge-off, and collateral dependent loans where the borrower is experiencing financial difficulty, are individually assessed. Individual assessment for collateral dependent commercial loans facing financial difficulty is based on the fair value of the collateral less estimated cost to sell, the present value of the expected cash flows from the operation of the collateral, or a scenario weighted approach of both of these methods. If a loan is not collateral dependent, the individual assessment is based on a discounted cash flow approach. For collateral dependent commercial loans and leases, Webster's process requires the Company to determine the fair value of the collateral by obtaining a third-party appraisal or asset valuation, an interim valuation analysis, blue book reference, or other internal methods. Fair value of the collateral for commercial loans is reevaluated quarterly. Whenever the Company has a third-party real estate appraisal performed by independent licensed appraisers, a licensed in-house appraisal officer or qualified individual reviews these appraisals for compliance with the Financial Institutions Reform Recovery and Enforcement Act and the Uniform Standards of Professional Appraisal Practice. Individual assessments for residential and home equity loans are based on a discounted cash flow approach or the fair value of collateral less the estimated costs to sell. Other consumer loans are individually assessed using a loss factor approach based on historical loss rates. For residential and consumer collateral dependent loans, a third-party appraisal is obtained upon loan default. Fair value of the collateral for residential and consumer collateral dependent loans is reevaluated every six months, by either obtaining a new appraisal or other internal valuation method. Fair value is also reassessed, with any excess amount charged off, for residential and home equity loans that reach 180 days past due per Federal Financial Institutions Examination Council guidelines. A fair value shortfall relative to the amortized cost balance is reflected as a valuation allowance within the ACL on loans and leases. Subsequent to an appraisal or other fair value estimate, should reliable information come to management's attention that the value has declined further, an additional allowance may be recorded to reflect the particular situation, thereby increasing the ACL on loans and leases. If the credit quality subsequently improves, the allowance is reversed up to a maximum of the previously recorded credit losses. Any individually assessed loan for which no specific valuation allowance is necessary is the result of either sufficient cash flow or sufficient collateral coverage relative to the amortized cost. Additional information regarding the ACL on loans and leases can be found within Note 5: Loans and Leases. Before the adoption of CECL on January 1, 2020, the allowance for loan and lease losses (ALLL) was determined under the ALLL incurred loss model, which reflected management’s best estimate of probable losses that may be incurred within the existing loan and lease portfolio as of the related balance sheet date. The ALLL consists of three elements: (i) specific valuation allowances established for probable losses on impaired loans and leases; (ii) quantitative valuation allowances calculated using loss experience for like loans and leases with similar characteristics and trends, adjusted, as necessary, to reflect the impact of current conditions; and (iii) qualitative factors determined based on general economic conditions and other factors that may be internal or external to the Company. The reserve level reflects management’s view of trends in losses, portfolio quality, and economic, political, and regulatory conditions. While management utilized its best judgment based on the information available at the time, the ultimate adequacy of the allowance was dependent upon a variety of factors that were beyond the Company’s control, which included the performance its portfolio, economic conditions, interest rate sensitivity, and other external factors. The process for estimating probable losses under the ALLL approach was based on predictive models that measured the current risk profile of the loan and lease portfolio and combined the measurement with other quantitative and qualitative factors. To measure credit risk for the commercial, commercial real estate, and equipment financing portfolios, the Company employed a dual grade credit risk grading system for estimating the PD and the LGD. The credit risk grade system under the ALLL model is the same as described under the CECL approach. For the Company's consumer portfolio, credit risk factors are also consistent with the factors used in the CECL approach. Back-testing was performed to compare original estimated losses and actual observed losses, resulting in ongoing refinements. The balance resulting from this process, together with specific valuation allowances, determined the overall reserve level. Charge-off of Uncollectible Loans Any loan may be charged-off if a loss confirming event has occurred or if there is a period of extended delinquency. Loss confirming events usually involve the receipt of specific adverse information about the borrower and may include bankruptcy when unsecured, foreclosure, or receipt of an asset valuation indicating a shortfall between the value of the collateral and the book value of the loan when the collateral is the sole source of repayment. The Company generally will charge-off commercial loans when it is determined that the specific loan or a portion thereof is uncollectible. This determination is based on facts and circumstances of the individual loan and normally includes considering the viability of the related business, the value of any collateral, the ability and willingness of any guarantors to perform, and the overall financial condition of the borrower. The Company generally will charge-off residential real estate loans to the estimated fair value of its collateral, net of selling costs, when becoming 180 days past due. Allowance for Credit Losses on Unfunded Loan Commitments The ACL on unfunded loan commitments provides for potential exposure inherent with funding the unused portion of legal commitments to lend that are not unconditionally cancellable by the Company. Accounting for unfunded loan commitments follows the CECL model. The calculation of the allowance inc

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Variable Interest Entities Webster has an investment interest in the following entities that each meet the definition of a variable interest entity. Consolidated Rabbi Trust. The Company established a Rabbi Trust to satisfy its obligations due under the 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. Investments held in the Rabbi Trust consist primarily of mutual funds that invest in equity and fixed income securities. Webster is considered the primary beneficiary of the Rabbi Trust as it has the power to direct the activities of the Rabbi Trust that most significantly impact its economic performance and it has the obligation to absorb losses and/or right to receive benefits of the Rabbi Trust that could potentially be significant. The Rabbi Trust's assets and the Company's deferred compensation plan obligation are included in accrued interest receivable and other assets and accrued expenses and other liabilities, respectively, on the accompanying Consolidated Balance Sheets. Investment earnings, including appreciation (depreciation) in fair value, and changes in the deferred compensation obligation, are included in other non-interest income and compensation and benefits, respectively, on the accompanying Consolidated Statements of Income. Information regarding the fair value of investments held in the Rabbi Trust can be found within Note 18: 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 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 right to receive benefits. Webster applies the proportional amortization method to subsequently measure its investments in qualified affordable housing projects. At December 31, 2021 and 2020, the aggregate carrying value of Webster's tax credit finance investments was $43.4 million and $37.2 million, respectively, which is included in accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets, and represents the Company's maximum exposure to loss. At December 31, 2021 and 2020, unfunded commitments of $11.1 million and $10.2 million were recognized, respectively, and are included in accrued expenses and other liabilities on the accompanying Consolidated Balance Sheets. During the years ended December 31, 2021 and 2019, Webster approved additional commitments of $10.1 million and $17.2 million, respectively, to fund tax credit finance investments. There were no such commitments approved during the year ended December 31, 2020. 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 issued 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 Consolidated Balance Sheets, and the related interest expense is reported as interest expense on long-term debt on the accompanying Consolidated Statements of Income. Additional information regarding these junior subordinated debentures can be found within Note 12: 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. At December 31, 2021 and 2020, the aggregate carrying value of Webster's other non-marketable investments was $61.5 million and $34.3 million, respectively, and its maximum exposure to loss, including unfunded commitments, was $95.9 million and $72.7 million, respectively. Information regarding the fair value other non-marketable investments can be found within Note 18: Fair Value Measurements.

Business Developments

Business Developments	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Business Developments	Business Developments Merger with Sterling Bancorp Effective 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. Pursuant to the merger agreement, 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. At the effective time of the merger, each share of Sterling common stock outstanding, 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. In addition, at the effective time of the merger, each outstanding share of Sterling 6.50% Series A Non-Cumulative Perpetual Preferred Stock 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. Webster registered and issued 135,000 depositary shares on January 31, 2022, 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) (Series G Preferred Stock). The Series G Preferred Stock ranks on parity with Webster's 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) (Series F Preferred Stock), and senior to Webster common stock, with respect to the payment of dividends and distributions upon the liquidation, dissolution, or winding-up of Webster. Additional information regarding Webster's Series F Preferred Stock can be found within Note 13: Shareholders' Equity. 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. Additional information regarding Webster's equity compensation plans can be found within Note 20: Share-Based Plans. Webster also assumed Sterling's long-term obligations with respect to $274.0 million in aggregate principal amount of 4.00% fixed-to-floating rate subordinated notes due 2029 issued by Sterling on December 16, 2019, and $225.0 million in aggregate principal amount of 3.875% fixed-to-floating rate subordinated notes due 2030 issued by Sterling on October 30, 2020. The transaction will be accounted for as a business combination. Accordingly, the purchase price will be 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. Given the close proximity between the transaction closing date and Webster’s Annual Report on Form 10-K, the preliminary purchase price allocation has not yet been completed. Management expects to complete the initial accounting for its merger with Sterling, including the purchase price allocation, later in the first quarter of 2022. As a result, the estimated fair values of the assets acquired and liabilities assumed, the valuation techniques and inputs used to measure and develop the fair values, and any goodwill recorded will be disclosed in Webster’s Quarterly Report on Form 10-Q for the period ended March 31, 2022, along with supplemental pro forma financial information as if the merger with Sterling had occurred as of January 1, 2020. During the year ended December 31, 2021, Webster incurred merger-related expenses totaling $37.5 million, which consisted primarily of professional fees for investment banking, legal, and consulting, and employee severance and retention costs. Merger-related expenses are recorded as either professional and outside services, or other non-interest expense on the accompanying Consolidated Statements of Income. 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. The acquisition accelerates Webster’s efforts underway to deliver enhanced user experiences at HSA Bank. The transaction will be accounted for as a business combination and the assets acquired and liabilities assumed will be reported at fair value. Webster plans to complete the initial purchase price allocation in the first quarter of 2022, which is not expected to have a material impact on the Company's consolidated financial statements. Strategic Initiatives During the fourth quarter of 2020, Webster launched a strategic plan to drive incremental revenue and cost savings measures across the organization through the consolidation of banking centers and corporate facilities, process automation, ancillary spend reduction, and other organizational actions. Costs incurred related to the execution of these strategic initiatives consisted of the following for the years ended December 31: Years ended December 31, (In thousands) 2021 2020 Severance and other benefits $ (1,562) $ 17,860 Professional fees and other related charges 8,569 10,788 ROU lease asset impairment 1,198 11,954 Other (1) (1,037) 2,055 Total strategic initiatives costs $ 7,168 $ 42,657 (1) Other includes accelerated depreciation and operating lease costs for all periods presented, gain on sale of banking centers and early lease terminations in 2021, and write-downs of property and equipment in 2020. Severance and other benefits costs are recorded as compensation and benefits, ROU lease asset impairment charges are recorded as occupancy, professional fees and other related charges are recorded as either occupancy or professional and outside services, and other is recorded as either occupancy, technology and equipment, or other non-interest expense on the accompanying Consolidated Statements of Income. The following table summarizes the changes in accrued expenses and other liabilities associated with these strategic initiatives: Year ended December 31, 2021 (In thousands) Severance and Professional fees and other Total Balance at December 31, 2019 $ — $ — $ — Additions charged to expense 17,860 10,788 28,648 Cash payments (185) (8,668) (8,853) Balance at December 31, 2020 $ 17,675 $ 2,120 $ 19,795 Additions charged to expense 2,340 8,569 10,909 Adjustments (1) (3,902) — (3,902) Cash payments (10,994) (8,962) (19,956) Balance at December 31, 2021 $ 5,119 $ 1,727 $ 6,846 (1) Changes in employee retention assumptions during the third quarter of 2021 resulted in a release of the Company's previously recorded severance accrual.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Available-for-Sale The following table summarizes the amortized cost and fair value of available-for-sale debt securities by major type: At December 31, 2021 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value (2) 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 At December 31, 2020 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value (2) Agency CMO $ 148,711 $ 6,000 $ (98) $ 154,613 Agency MBS 1,389,100 68,598 (289) 1,457,409 Agency CMBS 1,092,430 26,317 (1,514) 1,117,233 CMBS 512,759 1,082 (5,823) 508,018 CLO 76,693 — (310) 76,383 Corporate debt 14,557 — (1,437) 13,120 Available-for-sale debt securities $ 3,234,250 $ 101,997 $ (9,471) $ 3,326,776 (1) Accrued interest receivable of $7.5 million at both December 31, 2021 and 2020 is excluded from amortized cost and is reported within accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets. (2) Fair value represents net carrying value. No ACL has been recorded on available-for-sale debt securities at December 31, 2021 and 2020, as the securities held are high credit quality and investment grade. Unrealized Losses The following table summarizes 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 and for which an ACL has not been recorded: At December 31, 2021 Less Than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized # 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 $ 2,272,641 $ (17,086) $ 558,515 $ (17,256) 162 $ 2,831,156 $ (34,342) At December 31, 2020 Less Than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized # of Fair Unrealized Agency CMO $ 13,137 $ (49) $ 5,944 $ (49) 5 $ 19,081 $ (98) Agency MBS 33,742 (219) 4,561 (70) 30 38,303 (289) Agency CMBS 376,330 (1,514) — — 8 376,330 (1,514) CMBS 409,591 (5,486) 23,167 (337) 38 432,758 (5,823) CLO 57,728 (265) 18,655 (45) 4 76,383 (310) Corporate debt 4,100 (166) 9,020 (1,271) 3 13,120 (1,437) Available-for-sale debt securities $ 894,628 $ (7,699) $ 61,347 $ (1,772) 88 $ 955,975 $ (9,471) Available-for-sale debt securities in a continuous unrealized loss position have been assessed for impairment. Since the Company does not intend to sell nor will it be required to sell these securities prior to their anticipated recovery, and as the securities are investment grade, management concluded that no impairment is required. The increase in unrealized losses from 2020 to 2021 is primarily due to portfolio activity and higher market rates. Market prices will approach par as the securities approach maturity. There were no available-for-sale debt securities in non-accrual status at December 31, 2021 and 2020. Contractual Maturities The following table summarizes the amortized cost and fair value of available-for-sale debt securities by contractual maturity: At December 31, 2021 (In thousands) Amortized Fair Value Maturing within 1 year $ — $ — After 1 year through 5 years 401,668 400,037 After 5 years through 10 years 113,288 113,260 After 10 years 3,712,741 3,721,557 Available-for-sale debt securities $ 4,227,697 $ 4,234,854 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 prepay their obligations with or without prepayment penalties. Sales of Available-for Sale Debt Securities There were no sales of available-for-sale debt securities during the year ended December 31, 2021. During the year ended December 31, 2020, the Company sold available-for-sale debt securities for cash proceeds of $9.0 million, which resulted in gross realized gains of $8 thousand. During the year ended December 31, 2019, the Company sold available-for-sale debt securities for cash proceeds of $70.1 million, which resulted in gross realized gains of $773 thousand and gross realized losses of $744 thousand ($29 thousand net gain on sale). Held-to-Maturity The following table summarizes the amortized cost, fair value, and ACL of held-to-maturity debt securities by major type: At December 31, 2021 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value Allowance for Credit Losses 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 At December 31, 2020 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value Allowance for Credit Losses Net Carrying Value Agency CMO $ 91,622 $ 1,785 $ (241) $ 93,166 $ — $ 91,622 Agency MBS 2,419,751 137,863 (84) 2,557,530 — 2,419,751 Agency CMBS 2,101,227 60,484 (2,213) 2,159,498 — 2,101,227 Municipal bonds and notes 739,507 60,371 (3) 799,875 299 739,208 CMBS 216,081 9,214 — 225,295 — 216,081 Held-to-maturity debt securities $ 5,568,188 $ 269,717 $ (2,541) $ 5,835,364 $ 299 $ 5,567,889 (1) Accrued interest receivable of $21.2 million and $22.1 million at December 31, 2021 and December 31, 2020, respectively, is excluded from amortized cost and is reported within accrued interest receivable and other assets on the accompanying 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 federally-related entity, and are either explicitly or implicitly guaranteed and therefore, assumed to be zero loss. Held-to-maturity debt securities with gross unrealized losses and no ACL are considered to be of high credit quality and therefore, zero credit loss is recorded as of December 31, 2021. The current period unrealized loss position of certain Agency CMBS is primarily attributed to the changing interest rate environment. The following table summarizes the activity in the ACL on held-to-maturity debt securities: Years ended December 31, (In thousands) 2021 2020 Balance, beginning of period (1) $ 299 $ — Adoption of CECL — 397 (Benefit) for credit losses (85) (98) Balance, end of period $ 214 $ 299 (1) The Company adopted CECL on January 1, 2020. The prior period beginning balance did not have an allowance recorded under the applicable GAAP for that period. Contractual Maturities The table summarizes the amortized cost and fair value of held-to-maturity debt securities by contractual maturity: At December 31, 2021 (In thousands) Amortized Fair Value Maturing within 1 year $ 180 $ 180 After 1 year through 5 years 7,425 7,712 After 5 years through 10 years 292,727 304,190 After 10 years 5,898,007 5,968,854 Held-to-maturity debt securities $ 6,198,339 $ 6,280,936 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 prepay 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, and 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 December 31, 2021 and 2020. Held-to-maturity debt securities that are not rated are collateralized with U.S. Treasury obligations. The following table summarizes the amortized cost basis of held-to-maturity debt securities based on their lowest credit rating made publicly available: At December 31, 2021 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMOs $ — $ 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 $ 377,374 $ 5,442,277 $ 227,106 $ 104,232 $ 35,878 $ 8,260 $ — $ 95 $ 3,117 At December 31, 2020 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMOs $ — $ 91,622 $ — $ — $ — $ — $ — $ — $ — Agency MBS — 2,419,751 — — — — — — — Agency CMBS — 2,101,227 — — — — — — — Municipal bonds and notes 209,376 165,056 201,081 115,619 33,264 8,475 2,066 190 4,380 CMBS 216,081 — — — — — — — — Held-to-maturity $ 425,457 $ 4,777,656 $ 201,081 $ 115,619 $ 33,264 $ 8,475 $ 2,066 $ 190 $ 4,380 At December 31, 2021 and 2020, there were no held-to-maturity debt securities past due under the terms of their agreements or in non-accrual status. Other Information At December 31, 2021, Webster had callable CMBS, collateralized loan obligation securities (CLO), corporate debt, and municipal bonds and notes with an aggregate carrying value of $1.6 billion. The Company considers this prepayment risk in the evaluation of its interest rate risk profile. Available-for-sale and held-to-maturity debt securities with carrying values of $1.8 billion and $3.1 billion, respectively, at December 31, 2021, and $1.3 billion and $2.6 billion, respectively, at December 31, 2020, were pledged to secure public funds, trust deposits, repurchase agreements, and other purposes, as required or permitted by law.

Loans and Leases

Loans and Leases	12 Months Ended
	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Abstract]
Loans and Leases	Loans and Leases The following table summarizes loans and leases by portfolio segment and class: At December 31, (In thousands) 2021 2020 Commercial non-mortgage $ 6,882,480 $ 7,085,076 Asset-based 1,067,248 890,598 Commercial real estate 6,603,180 6,322,637 Equipment financing 627,058 602,224 Commercial portfolio 15,179,966 14,900,535 Residential 5,412,905 4,782,016 Home equity 1,593,559 1,802,865 Other consumer 85,299 155,799 Consumer portfolio 7,091,763 6,740,680 Loans and leases $ 22,271,729 $ 21,641,215 The carrying amount of loans and leases includes net unamortized deferred costs/(fees) and net unamortized discounts/(premiums) of $12.3 million and $(10.5) million at December 31, 2021 and 2020, respectively. The net change from 2020 to 2021 is primarily attributed to increased deferred fees in 2020 due to PPP loans. Accrued interest receivable of $50.7 million and $57.8 million at December 31, 2021 and 2020, respectively, is excluded from the carrying amount of loans and leases and is reported within accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets. At December 31, 2021, Webster had pledged $7.8 billion of eligible loans as collateral to support its borrowing capacity at both the FHLB of Boston and the FRB of Boston. 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 December 31, 2021 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total 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 6,596,690 6,603,180 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 At December 31, 2020 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total Current Total Loans Commercial non-mortgage $ 612 $ 903 $ 445 $ 64,073 $ 66,033 $ 7,019,043 $ 7,085,076 Asset-based 1,174 — — 2,594 3,768 886,830 890,598 Commercial real estate 2,400 619 — 21,231 24,250 6,298,387 6,322,637 Equipment financing 5,107 2,308 — 7,299 14,714 587,510 602,224 Commercial portfolio 9,293 3,830 445 95,197 108,765 14,791,770 14,900,535 Residential 4,334 6,330 — 41,081 51,745 4,730,271 4,782,016 Home equity 5,500 1,771 — 31,030 38,301 1,764,564 1,802,865 Other consumer 878 601 — 652 2,131 153,668 155,799 Consumer portfolio 10,712 8,702 — 72,763 92,177 6,648,503 6,740,680 Total $ 20,005 $ 12,532 $ 445 $ 167,960 $ 200,942 $ 21,440,273 $ 21,641,215 The following table provides additional information on non-accrual loans and leases: At December 31, 2021 2020 (In thousands) Non-accrual Non-accrual With No Allowance Non-accrual Non-accrual With No Allowance Commercial non-mortgage $ 59,607 $ 4,802 $ 64,073 $ 16,985 Asset-based 2,086 2,086 2,594 — Commercial real estate 5,046 4,310 21,231 15,529 Equipment financing 3,728 — 7,299 2,983 Commercial portfolio 70,467 11,198 95,197 35,497 Residential 15,747 10,584 41,081 29,843 Home equity 23,489 18,920 31,030 24,091 Other consumer 224 2 652 2 Consumer portfolio 39,460 29,506 72,763 53,936 Total $ 109,927 $ 40,704 $ 167,960 $ 89,433 Interest on non-accrual loans that would have been recognized as additional interest income had the loans been current in accordance with their original terms totaled $11.0 million, $9.7 million, and $11.3 million for the years ended December 31, 2021, 2020, and 2019, 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 Years ended December 31, 2021 2020 2019 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Beginning balance $ 312,244 $ 47,187 $ 359,431 $ 161,669 $ 47,427 $ 209,096 $ 164,073 $ 48,280 $ 212,353 Adoption of CECL — — — 34,024 23,544 57,568 — — — (Benefit) provision (48,651) (5,764) (54,415) 156,336 (18,488) 137,848 29,174 8,626 37,800 Charge-offs (9,437) (9,217) (18,654) (42,925) (12,408) (55,333) (33,327) (19,153) (52,480) Recoveries 3,721 11,104 14,825 3,140 7,112 10,252 1,749 9,674 11,423 Ending balance $ 257,877 $ 43,310 $ 301,187 $ 312,244 $ 47,187 $ 359,431 $ 161,669 $ 47,427 $ 209,096 Individually assessed ACL 16,965 4,108 21,073 11,687 4,450 16,137 9,428 4,821 14,249 Collectively assessed ACL $ 240,912 $ 39,202 $ 280,114 $ 300,557 $ 42,737 $ 343,294 $ 152,241 $ 42,606 $ 194,847 The $58.2 million decrease in the ACL on loans and leases from 2020 to 2021 is primarily due to improvements in the forecasted economic outlook and favorable credit trends, which were negatively affected by the emergence of the COVID-19 pandemic in 2020 and resulted in a release of reserves in 2021, partially offset by reserves on newly originated loans and leases. 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 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 1,375,306 869,144 1,331,236 916,868 401,718 1,339,942 55,610 6,289,824 Special mention 95 3,084 — 119,676 51,536 79,096 — 253,487 Substandard — 482 227 7,306 13,874 37,980 — 59,869 Commercial real estate 1,375,401 872,710 1,331,463 1,043,850 467,128 1,457,018 55,610 6,603,180 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 Total 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 At December 31, 2020 (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total Commercial non-mortgage: Pass $ 2,771,373 $ 1,052,080 $ 907,110 $ 481,321 $ 231,280 $ 218,001 $ 936,592 $ 6,597,757 Special mention 32,535 33,969 62,034 435 8,357 13,757 38,496 189,583 Substandard 54,716 51,798 66,324 36,159 15,535 23,957 49,084 297,573 Doubtful — — — 163 — — — 163 Commercial non-mortgage 2,858,624 1,137,847 1,035,468 518,078 255,172 255,715 1,024,172 7,085,076 Asset-based: Pass 26,344 15,960 23,123 11,333 10,963 16,484 741,336 845,543 Special mention — — 775 — — — 41,687 42,462 Substandard — 2,504 — — — — 89 2,593 Asset-based 26,344 18,464 23,898 11,333 10,963 16,484 783,112 890,598 Commercial real estate: Pass 965,582 1,461,201 1,242,322 527,931 554,630 1,165,331 28,113 5,945,110 Special mention 27 10,385 70,704 37,539 35,617 69,832 — 224,104 Substandard 817 1,132 21,923 73,621 2,962 52,968 — 153,423 Commercial real estate 966,426 1,472,718 1,334,949 639,091 593,209 1,288,131 28,113 6,322,637 Equipment financing: Pass 249,370 135,263 68,092 26,433 43,469 22,879 — 545,506 Special mention 7,934 11,043 6,981 1,220 1,577 788 — 29,543 Substandard 7,483 6,169 5,749 2,460 4,743 571 — 27,175 Equipment financing 264,787 152,475 80,822 30,113 49,789 24,238 — 602,224 Total commercial portfolio $ 4,116,181 $ 2,781,504 $ 2,475,137 $ 1,198,615 $ 909,133 $ 1,584,568 $ 1,835,397 $ 14,900,535 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 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 Total consumer portfolio 2,198,697 1,077,624 502,707 144,883 274,746 1,669,802 1,223,304 7,091,763 At December 31, 2020 (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total Residential: 800+ $ 360,336 $ 283,755 $ 61,048 $ 178,849 $ 268,044 $ 805,537 $ — $ 1,957,569 740-799 654,973 288,173 58,249 133,416 176,286 492,720 — 1,803,817 670-739 199,329 118,620 39,125 75,375 76,666 248,268 — 757,383 580-669 17,151 19,389 8,884 11,843 12,225 96,333 — 165,825 579 and below — 36,498 673 3,278 3,179 53,794 — 97,422 Residential 1,231,789 746,435 167,979 402,761 536,400 1,696,652 — 4,782,016 Home equity: 800+ 30,604 16,567 25,205 14,439 17,192 59,956 542,600 706,563 740-799 34,797 13,565 19,715 11,073 12,839 43,802 434,271 570,062 670-739 13,753 8,855 10,761 10,206 7,318 44,025 275,691 370,609 580-669 1,708 2,172 2,660 2,234 2,316 16,680 86,126 113,896 579 and below 129 919 880 1,070 1,073 7,163 30,501 41,735 Home equity 80,991 42,078 59,221 39,022 40,738 171,626 1,369,189 1,802,865 Other consumer: 800+ 2,827 5,725 2,610 658 115 190 7,171 19,296 740-799 12,317 21,036 8,925 1,493 457 263 5,119 49,610 670-739 14,761 31,952 11,843 2,284 665 228 8,403 70,136 580-669 2,344 5,419 2,360 793 194 124 1,570 12,804 579 and below 608 982 500 183 37 215 1,428 3,953 Other consumer 32,857 65,114 26,238 5,411 1,468 1,020 23,691 155,799 Total consumer portfolio 1,345,637 853,627 253,438 447,194 578,606 1,869,298 1,392,880 6,740,680 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 December 31, 2021 and 2020, the carrying amount of collateral dependent commercial loans and leases totaled $16.6 million and $42.1 million, respectively, and the carrying amount of collateral dependent consumer loans totaled $34.9 million and $60.8 million, respectively. Commercial non-mortgage, asset-based, and equipment financing loans and leases are generally secured by machinery and equipment, inventories, receivables, or other non-real estate assets, whereas commercial real estate, residential, home equity, and other consumer loans are secured by real estate. The ACL for collateral dependent loans and leases is individually assessed based on the fair value of the collateral less costs to sell at the reporting date. At December 31, 2021 and 2020, the collateral value on collateral dependent loans and leases totaled $86.0 million and $150.3 million, respectively. Troubled Debt Restructurings The following table summarizes information related to TDRs: At December 31, (Dollars in thousands) 2021 2020 Accrual status $ 110,625 $ 140,089 Non-accrual status 52,719 95,338 Total TDRs $ 163,344 $ 235,427 Additional funds committed to borrowers in TDR status $ 5,975 $ 12,895 Specific reserves for TDRs included in the ACL on loans and leases: Commercial portfolio $ 9,017 $ 8,657 Consumer portfolio 3,745 4,071 The respective portions of commercial and consumer TDRs deemed to be uncollectible and charged-off were $3.0 million and $0.4 million during the year ended December 31, 2021, $17.6 million and $0.8 million during the year ended December 31, 2020, and $20.3 million and $1.5 million during the year ended December 31, 2019. The following table summarizes loans and leases modified as TDRs by class and modification type: Years ended December 31, 2021 2020 2019 Number of Recorded Investment (1) Number of Recorded Investment (1) Number of Recorded Investment (1) (Dollars in thousands) Commercial non-mortgage Extended maturity 8 $ 605 11 $ 1,070 15 $ 2,413 Adjusted interest rate — — 1 96 2 112 Maturity/rate combined 9 352 7 607 11 673 Other (2) 12 14,160 24 40,128 28 65,186 Commercial real estate Extended maturity 1 183 1 72 3 8,356 Maturity/rate combined — — 2 377 — — Other (2) 1 1,582 3 306 3 4,816 Residential Extended maturity 1 99 3 485 7 1,327 Maturity/rate combined 2 401 10 1,133 15 2,241 Other (2) 3 280 26 4,215 8 1,001 Home equity Extended maturity 85 1,809 3 188 6 599 Maturity/rate combined 6 1,025 5 334 4 140 Other (2) 22 1,481 96 6,680 34 1,907 Total TDRs 150 $ 21,977 192 $ 55,691 136 $ 88,771 (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 of Financial Assets

Transfers of Financial Assets	12 Months Ended
	Dec. 31, 2021
Transfers and Servicing [Abstract]
Transfers 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 loans sold are included in mortgage banking activities on the accompanying Consolidated Statements of Income. The following table provides information related to mortgage banking activities: Years ended December 31, (In thousands) 2021 2020 2019 Proceeds from sale $ 247,634 $ 486,341 $ 216,239 Loans sold with servicing rights retained 237,834 464,736 199,114 Net gain on sale $ 5,192 $ 15,305 $ 4,031 Ancillary fees 1,440 3,230 1,614 Fair value option adjustment (413) (240) 470 Under certain circumstances, Webster may decide to sell loans that were not originated with the intent to sell. During the years ended December 31, 2021, 2020, and 2019, the Company sold commercial and consumer loans not originated for sale for cash proceeds of $82.2 million, $9.2 million, and $20.9 million, respectively, which resulted in net gains on sale of $3.9 million, $0.3 million, and $0.7 million, respectively. In addition, Webster may retain servicing rights on its residential mortgage loans sold in the normal course of business. At December 31, 2021 and 2020, the aggregate principal balance of residential mortgage loans serviced for others totaled $2.0 billion and $2.3 billion, respectively. 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. The Company 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: Years ended December 31, (In thousands) 2021 2020 2019 Beginning balance $ 13,422 $ 17,484 $ 21,215 Additions 2,053 4,373 3,587 Amortization (5,593) (6,562) (7,318) Adjustment to valuation allowance (645) (1,873) — Ending balance $ 9,237 $ 13,422 $ 17,484 Loan servicing fees, net of mortgage servicing assets amortization and adjustments to the valuation allowance, were $1.7 million, $1.5 million, and $1.9 million for the years ended December 31, 2021, 2020, and 2019, respectively, and are included in loan and lease related fees on the accompanying Consolidated Statements of Income. Information regarding the fair value of loans held for sale and mortgage servicing assets can be found within Note 18: Fair Value Measurements.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The following table summarizes the components of premises and equipment: At December 31, (In thousands) 2021 2020 Land $ 9,436 $ 9,436 Buildings and improvements 67,501 70,195 Leasehold improvements 65,606 71,332 Fixtures and equipment 64,890 73,730 Data processing and software 105,516 270,780 Property and equipment 312,949 495,473 Less: Accumulated depreciation and amortization (228,318) (396,211) Property and equipment, net 84,631 99,262 ROU lease assets, net 119,926 127,481 Premises and equipment, net $ 204,557 $ 226,743 Depreciation and amortization of property and equipment was $31.4 million, $32.5 million, and $33.7 million for the years ended December 31, 2021, 2020, and 2019, respectively, and is included in occupancy and technology and equipment expense on the accompanying Consolidated Statements of Income. Additional information regarding ROU lease assets can be found within Note 8: Leasing. The following table summarizes activity in assets held for disposition: Years ended December 31, (In thousands) 2021 2020 Beginning balance $ 2,654 $ — Transfers (to) from property and equipment (38) 2,654 Sales (2,126) — Ending balance $ 490 $ 2,654 There was no significant activity in assets held for disposition during 2019. Assets held for disposition is included in accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets.

Leases Leases

Leases Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	Leasing Lessor Arrangements Webster leases certain types of machinery and equipment to its customers through direct financing leases as part of its equipment financing portfolio. These leases generally have remaining lease terms of 1 to 10 years, and include options for the lessee to purchase the lease asset near or at the end of the lease term. Webster recognized interest income from its lessor activities of $7.5 million, $7.1 million, and $5.5 million for the years ended December 31, 2021, 2020, and 2019, respectively. Additional information regarding Webster's equipment financing portfolio can be found within Note 5: Loans and Leases. The following table summarizes the components of Webster's net investment in its direct financing leases: At December 31, (In thousands) 2021 2020 Lease receivables $ 196,632 $ 207,508 Unguaranteed residual values 19,748 28,609 Total net investment $ 216,380 $ 236,117 The undiscounted scheduled maturities reconciled to the total net investment are as follows: (In thousands) At December 31, 2021 2022 $ 68,008 2023 59,554 2024 39,325 2025 29,534 2026 21,687 Thereafter 16,636 Total lease payments receivable 234,744 Present value adjustment (18,364) Total net investment $ 216,380 Lessee Arrangements Webster enters into operating leases in the normal course of business, primarily for office space, banking centers, and other operational activities. These leases generally have remaining lease terms of one The following table summarizes Webster's ROU lease assets and operating lease liabilities: At December 31, (In thousands) Consolidated Balance Sheet Line Item 2021 2020 ROU lease assets Premises and equipment, net $ 119,926 $ 127,481 Operating lease liabilities Operating lease liabilities 144,804 158,280 ROU lease asset impairments totaled $1.2 million and $12.0 million for the years ended December 31, 2021 and 2020, respectively, which is recorded in occupancy on the accompanying Consolidated Statements of Income. The increased charge in 2020 was due to Webster's decision to close leased banking centers as part of its strategic initiatives. There were no ROU lease asset impairments during the year ended December 31, 2019. The following table summarizes the components of operating lease expense and other relevant information: At or for the Years ended December 31, (In thousands) 2021 2020 2019 Lease Cost: Operating lease costs $ 26,076 $ 30,339 $ 29,908 Variable lease costs 4,860 5,577 4,889 Sublease income (554) (557) (577) Total operating lease expense $ 30,382 $ 35,359 $ 34,220 Other Information: Cash paid for amounts included in the measurement of operating lease liabilities $ 30,487 $ 31,212 $ 31,223 ROU lease assets obtained in exchange for operating lease liabilities 15,226 9,211 22,948 Weighted-average remaining lease term (years) 7.50 8.04 8.39 Weighted-average discount rate 3.04 % 3.19 % 3.31 % The undiscounted scheduled maturities reconciled to total operating lease liabilities are as follows: (In thousands) At December 31, 2021 2022 $ 25,895 2023 26,539 2024 23,767 2025 21,792 2026 18,656 Thereafter 48,009 Total operating lease payments 164,658 Present value adjustment (19,854) Total operating lease liabilities $ 144,804

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets There has been no change in the carrying amount for goodwill during the year ended December 31, 2021. Information regarding goodwill by reportable segment can be found within Note 21: Segment Reporting. Other intangible assets by reportable segment consisted of the following: At December 31, 2021 2020 (In thousands) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying HSA Bank - Core deposits $ 26,625 $ 18,516 $ 8,109 $ 26,625 $ 15,618 $ 11,007 HSA Bank - Customer relationships 21,000 11,240 9,760 21,000 9,624 11,376 Total other intangible assets $ 47,625 $ 29,756 $ 17,869 $ 47,625 $ 25,242 $ 22,383 The remaining estimated aggregate future amortization expense for other intangible assets is as follows at December 31, 2021: (In thousands) 2022 $ 4,410 2023 4,315 2024 2,084 2025 2,084 2026 2,084 Thereafter 2,892

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense reflects the following expense (benefit) components: Years ended December 31, (In thousands) 2021 2020 2019 Current: Federal $ 109,621 $ 73,172 $ 84,447 State and local 20,374 17,417 18,595 Total current 129,995 90,589 103,042 Deferred: Federal (9,844) (23,799) 811 State and local 4,846 (7,437) 116 Total deferred (4,998) (31,236) 927 Total federal 99,777 49,373 85,258 Total state and local 25,220 9,980 18,711 Income tax expense $ 124,997 $ 59,353 $ 103,969 Included in the Company's income tax expense for the years ended December 31, 2021, 2020, and 2019, are net tax credits of approximately $2.6 million, $1.1 million, and $4.8 million, respectively, along with a $0.4 million benefit from operating loss carryforwards in 2021. The deferred federal benefit in 2021 reflects the effects of elections Webster made on its 2020 federal tax return to defer cost recovery deductions, which did not impact deferred state and local expense to any significant degree. The $2.6 million of net tax credits in 2021 includes $0.5 million for increases in federal and state research tax credits previously estimated for and recognized in 2020. The $4.8 million of net tax credits in 2019 includes $3.0 million related to federal and state research tax credits, $2.4 million of which relates to the Company’s qualifying technology expenditures incurred before 2019. The following table reflects a reconciliation of reported income tax expense to the amount that would result from applying the federal statutory rate of 21.0%: Years ended December 31, 2021 2020 2019 (Dollars in thousands) Amount Percent Amount Percent Amount Percent Income tax expense at federal statutory rate $ 112,111 21.0 % $ 58,795 21.0 % $ 102,205 21.0 % Reconciliation to reported income tax expense: SALT expense, net of federal 19,924 3.7 7,884 2.8 14,782 3.0 Tax-exempt interest income, net (6,814) (1.3) (7,181) (2.6) (6,752) (1.4) Increase in cash surrender value of life insurance (3,030) (0.6) (3,058) (1.1) (3,069) (0.6) Tax deficiencies (excess tax benefits), net (1,479) (0.3) 484 0.2 (2,251) (0.4) Non-deductible FDIC Deposit insurance premiums 2,064 0.4 2,172 0.8 1,904 0.4 Non-deductible merger-related expenses 3,451 0.7 — — — — Other, net (1,230) (0.2) 257 0.1 (2,850) (0.6) Income tax expense and effective tax rate $ 124,997 23.4 % $ 59,353 21.2 % $ 103,969 21.4 % The following table reflects the significant components of the DTAs, net: At December 31, (In thousands) 2021 2020 Deferred tax assets: Allowance for loan and lease losses $ 78,905 $ 93,791 Net operating loss and credit carry forwards 64,366 66,840 Compensation and employee benefit plans 22,840 27,643 Lease liabilities under operating leases 38,130 41,679 Other 12,790 8,750 Gross deferred tax assets 217,031 238,703 Valuation allowance 37,374 37,374 Total deferred tax assets, net of valuation allowance $ 179,657 $ 201,329 Deferred tax liabilities: Net unrealized gain on securities available for sale $ 1,885 $ 24,364 Net unrealized gain on derivatives 2,584 7,616 ROU assets under operating leases 31,580 33,569 Equipment financing leases 21,193 38,511 Premises and equipment 879 6,735 Goodwill and other intangible assets 5,690 5,954 Other 6,441 3,294 Gross deferred tax liabilities 70,252 120,043 Deferred tax assets, net $ 109,405 $ 81,286 The Company's DTAs, net increased by $28.1 million during 2021, primarily reflecting the $5.0 million deferred tax benefit and a $23.2 million benefit allocated directly to AOCI. The decreases in the equipment financing leases and premises and equipment DTLs during 2021 reflect elections Webster made on its 2020 federal tax return to defer cost recovery deductions. The valuation allowance of $37.4 million at both December 31, 2021 and 2020 is attributable to SALT net operating loss carryforwards, which approximated $1.1 billion at December 31, 2021 and are scheduled to expire in varying amounts during tax years 2024 through 2032. The valuation allowance has been established for approximately $630.8 million of those net operating loss carryforwards estimated to expire unused. Management believes it is more likely than not that the results of future operations will generate sufficient taxable income to realize its total DTAs, net of the valuation allowance. Although taxable income in prior years is no longer able to be included as a source of taxable income, due to the general repeal of the carryback of net operating losses under the Tax Cuts and Jobs Act of 2017, significant positive evidence remains in support of management's conclusion regarding the realizability of the Company's DTAs, including projected future reversals of existing taxable temporary differences and book-taxable income levels in recent and projected in future years. There can, however, be no assurance that any specific level of future income will be generated or that the Company’s DTAs will ultimately be realized. A DTL of $15.3 million has not been recognized for certain thrift bad-debt reserves, established before 1988, that would become taxable upon the occurrence of certain events: distributions by Webster Bank in excess of certain earnings and profits; the redemption of Webster Bank’s stock; or liquidation. Webster does not expect any of those events to occur. At December 31, 2021 the cumulative taxable temporary differences applicable to those reserves approximated $58.0 million. The following table reflects a reconciliation of the beginning and ending balances of unrecognized tax benefits (UTBs): Years ended December 31, (In thousands) 2021 2020 2019 Beginning balance $ 4,252 $ 4,813 $ 2,856 Additions as a result of tax positions taken during the current year 294 87 1,106 Additions as a result of tax positions taken during prior years 434 572 1,744 Reductions as a result of tax positions taken during prior years (186) (694) (238) Reductions relating to settlements with taxing authorities (267) (130) (18) Reductions as a result of lapse of statute of limitation periods (278) (396) (637) Ending balance $ 4,249 $ 4,252 $ 4,813 At December 31, 2021, 2020, and 2019, there were $3.5 million, $3.5 million, and $3.9 million, respectively, of UTBs that if recognized would affect the effective tax rate. Webster recognizes interest and penalties related to UTBs, where applicable, in income tax expense. Webster recognized an expense of $0.3 million during the year ended December 31, 2021, and a benefit of $0.1 million for both the years ended December 31, 2020 and 2019. At December 31, 2021 and 2020, the Company had accrued interest and penalties related to UTBs of $1.9 million and $1.7 million respectively. Webster has determined it is reasonably possible that its total UTBs could decrease by an amount in the range of $1.6 million to $2.6 million by the end of 2022 as a result of potential lapses in statute-of-limitation periods and/or potential settlements with taxing authorities concerning various apportionment, tax-base, and research tax credit determinations. Webster's federal tax returns for all years subsequent to 2016 remain open to examination. Webster's tax returns filed in its principal state tax jurisdictions of Connecticut, Massachusetts, New York, and Rhode Island for years subsequent to 2014, or 2017, are either under or remain open to examination.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2021
Deposit Liabilities [Abstract]
Deposits	Deposits The following table summarizes deposits by type: At December 31, (In thousands) 2021 2020 Non-interest-bearing: Demand $ 7,060,488 $ 6,155,592 Interest-bearing: Health savings accounts 7,397,582 7,120,017 Checking 4,182,497 3,652,763 Money market 3,718,953 2,940,215 Savings 5,689,739 4,979,031 Time deposits 1,797,770 2,487,818 Total interest-bearing 22,786,541 21,179,844 Total deposits $ 29,847,029 $ 27,335,436 Time deposits and interest-bearing checking obtained through brokers $ 120,392 $ 720,440 Aggregate amount of time deposit accounts that exceeded the FDIC limit 256,522 504,543 Demand deposit overdrafts reclassified as loan balances 1,577 2,007 The scheduled maturities of time deposits are as follows: (In thousands) At December 31, 2021 2022 $ 1,566,257 2023 115,321 2024 46,432 2025 49,849 2026 19,911 Total time deposits $ 1,797,770

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Borrowings	Borrowings Total borrowed funds were $1.2 billion and $1.7 billion at December 31, 2021 and 2020, respectively. The components of Webster's borrowings are discussed further below. The following table summarizes securities sold under agreements to repurchase and other borrowings: At December 31, 2021 2020 (Dollars in thousands) Total Outstanding Rate Total Outstanding Rate Securities sold under agreements to repurchase (1) : Original maturity of one year or less $ 474,896 0.11 % $ 269,330 0.13 % Original maturity of greater than one year, non-callable 200,000 1.32 200,000 0.84 Total securities sold under agreements to repurchase 674,896 0.47 469,330 0.43 Federal funds purchased — — 526,025 0.08 Securities sold under agreements to repurchase and other borrowings $ 674,896 0.47 % $ 995,355 0.25 % (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. Securities sold under agreements to repurchase are used as a source of borrowed funds and are collateralized by Agency MBS. Webster'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 term and overnight federal funds to satisfy its short-term liquidity needs. The following table summarizes information for FHLB advances: At December 31, 2021 2020 (Dollars in thousands) Total Weighted-Average Contractual Coupon Rate Total Weighted-Average Contractual Coupon Rate Maturing within 1 year $ 90 — % $ 25,000 0.38 % After 1 year but within 2 years 202 2.95 110 — After 2 years but within 3 years — — 215 2.95 After 3 years but within 4 years — — 50,000 1.59 After 4 years but within 5 years — — 50,000 1.42 After 5 years 10,705 2.03 7,839 2.66 FHLB advances $ 10,997 2.03 % $ 133,164 1.36 % Aggregate carrying value of assets pledged as collateral $ 7,556,034 $ 7,387,054 Remaining borrowing capacity at FHLB 5,087,294 4,689,642 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 December 31, 2021 and 2020. The following table summarizes long-term debt: At December 31, (Dollars in thousands) 2021 2020 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) 338,811 344,164 Junior subordinated debt Webster Statutory Trust I floating-rate notes due September 17, 2033 (2) 77,320 77,320 Total senior and subordinated debt 566,131 571,484 Discount on senior fixed-rate notes (974) (1,193) Debt issuance cost on senior fixed-rate notes (2,226) (2,628) Long-term debt $ 562,931 $ 567,663 (1) Webster de-designated its fair value hedging relationship on these senior notes in 2020. A basis adjustment of $38.8 million and $44.2 million at December 31, 2021 and 2020, respectively, is included in the carrying value and is being amortized over the remaining life of the senior notes.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity The following table summarizes the changes in Webster's preferred shares, common shares, and treasury shares for the year ended December 31, 2021: Preferred Stock Series F Common Stock Issued Treasury Stock Held Common Stock Outstanding Balance at January 1, 2021 6,000 93,686,311 3,487,389 90,198,922 Restricted share activity — — (154,281) 154,281 Stock options exercised — — (230,418) 230,418 Balance at December 31, 2021 6,000 93,686,311 3,102,690 90,583,621 Common Stock Webster maintains a common stock repurchase program, which was announced on October 29, 2019 and approved by the Board of Directors, that authorizes management to purchase up to $200.0 million of its common stock in either open market or privately negotiated transactions, subject to market conditions and other factors. Due to the effects of the COVID-19 pandemic on the economic environment, Webster had temporarily suspended repurchases of its common stock under the program in 2020. Further, as part of the Company's executed merger agreement with Sterling dated as of April 18, 2021, Webster was restricted from repurchasing any shares under the program through the close of the transaction. Now that the transaction has closed effective January 31, 2022, Webster has resumed its common stock repurchase program subject to prevailing market conditions. At December 31, 2021, the remaining repurchase authority under the common stock repurchase program was $123.4 million. Preferred Stock At December 31, 2021, Webster had 6,000,000 depositary shares outstanding, each representing 1/1000th ownership interest in a share of its Series F Preferred Stock. Dividends on the Series F Preferred Stock are non-cumulative and are not mandatory. If declared by the Board of Directors (or a duly authorized committee thereof), Webster pays dividends quarterly in arrears on the fifteenth day of each March, June, September, and December, at a rate equal to 5.25% of the $25,000 per share liquidation amount per annum. If the Board of Directors (or a duly authorized committee thereof) does not declare a dividend on the Series F Preferred Stock in respect of a dividend period, a dividend will not accrue and Webster has no obligation to pay any dividend for that period, regardless as to whether a dividend is declared for a future period on the Series F Preferred stock or any other series of Webster preferred stock. The terms of the Series F Preferred Stock prohibit Webster from declaring or paying any cash dividends on its common stock, and from repurchasing, redeeming, or otherwise acquiring Webster common stock or any other series of Webster preferred stock to which it ranks on parity with, unless dividends have been declared and paid in full on the Series F Preferred Stock for the most recent dividend period. The Series F Preferred Stock is perpetual and has no maturity date, and is not subject to any mandatory redemption, sinking fund, or other similar provisions. Webster may redeem the Series F Preferred Stock at its option, in whole or in part, subject to the approval of the Federal Reserve Board, on December 15, 2022, or any dividend payment date thereafter, or in whole but not in part, upon the occurrence of a regulatory capital treatment event as defined in the Prospectus Supplement, at a redemption price equal to the liquidation preference plus any declared and unpaid dividends, without accumulation of any undeclared dividends. Except with respect to certain non-payment events and changes to the terms of the Series F Preferred Stock, holders of Series F Preferred Stock have no voting rights nor preemptive or conversion rights. The Series F Preferred Stock is not convertible or exchangeable for shares of any other class of Webster stock. Additional information regarding Webster's common and preferred stock, including the subsequent changes as a result of the Company's merger with Sterling, can be found within Note 3: Business Developments.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss, Net of Tax	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Loss, Net of Tax	Accumulated Other Comprehensive (Loss) Income, Net of Tax The following table summarizes the changes in each component of accumulated other comprehensive (loss) income, net of tax: (In thousands) Securities Available Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Balance at December 31, 2018 $ (71,374) $ (9,313) $ (49,965) $ (130,652) Other comprehensive income (loss) before reclassifications 88,647 (4,945) 1,622 85,324 Amounts reclassified from accumulated other comprehensive (loss) (22) 5,074 4,204 9,256 Other comprehensive income, net of tax 88,625 129 5,826 94,580 Balance at December 31, 2019 17,251 (9,184) (44,139) (36,072) Other comprehensive income (loss) before reclassifications 50,179 20,667 (3,887) 66,959 Amounts reclassified from accumulated other comprehensive (6) 8,435 2,940 11,369 Other comprehensive income (loss), net of tax 50,173 29,102 (947) 78,328 Balance at December 31, 2020 67,424 19,918 (45,086) 42,256 Other comprehensive (loss) income before reclassifications (62,888) (17,109) 8,876 (71,121) Amounts reclassified from accumulated other comprehensive — 3,261 3,024 6,285 Other comprehensive (loss) income, net of tax (62,888) (13,848) 11,900 (64,836) Balance at December 31, 2021 $ 4,536 $ 6,070 $ (33,186) $ (22,580) The following table further summarizes the amounts reclassified from accumulated other comprehensive (loss) income: Years ended December 31, Accumulated Other Comprehensive 2021 2020 2019 Associated Line Item in the Consolidated Statement Of Income (In thousands) Securities available-for-sale: Net unrealized holding gains $ — $ 8 $ 29 Gain on sale of investment securities, net Tax (expense) — (2) (7) Income tax expense Net of tax $ — $ 6 $ 22 Derivative instruments: Hedge terminations $ (4,109) $ (7,884) $ (5,509) Interest expense Premium amortization (306) (3,536) (1,323) Interest income Tax benefit 1,154 2,985 1,758 Income tax expense Net of tax $ (3,261) $ (8,435) $ (5,074) Defined benefit pension and other postretirement benefit plans: Actuarial net loss amortization $ (4,102) $ (3,976) $ (5,706) Other non-interest expense Tax benefit 1,078 1,036 1,502 Income tax expense Net of tax $ (3,024) $ (2,940) $ (4,204) The following tables summarize each component of other comprehensive (loss) income and the related tax effects: Year ended December 31, 2021 (In thousands) Amount Tax Benefit (Expense) Amount Securities available-for-sale: Net unrealized holding (losses) arising during the year $ (85,368) $ 22,480 $ (62,888) Total securities available-for-sale (85,368) 22,480 (62,888) Derivative instruments: Net unrealized (losses) arising during the year (23,216) 6,107 (17,109) Reclassification adjustment for net realized losses included in net income 4,415 (1,154) 3,261 Total derivative instruments (18,801) 4,953 (13,848) Defined benefit pension and other postretirement benefit plans: Net actuarial gain arising during the year 12,052 (3,176) 8,876 Reclassification adjustment for net actuarial loss amortization included in net income 4,102 (1,078) 3,024 Total defined benefit pension and postretirement benefit plans 16,154 (4,254) 11,900 Other comprehensive (loss), net of tax $ (88,015) $ 23,179 $ (64,836) Year ended December 31, 2020 (In thousands) Amount Tax Benefit (Expense) Amount Securities available-for-sale: Net unrealized holding gains arising during the year $ 68,116 $ (17,937) $ 50,179 Reclassification adjustment for net realized gains included in net income (8) 2 (6) Total securities available-for-sale 68,108 (17,935) 50,173 Derivative instruments: Net unrealized gains arising during the year 27,683 (7,016) 20,667 Reclassification adjustment for net realized losses included in net income 11,420 (2,985) 8,435 Total derivative instruments 39,103 (10,001) 29,102 Defined benefit pension and other postretirement benefit plans: Net actuarial loss arising during the year (5,262) 1,375 (3,887) Reclassification adjustment for net actuarial loss amortization included in net income 3,976 (1,036) 2,940 Total defined benefit pension and postretirement benefit plans (1,286) 339 (947) Other comprehensive income, net of tax $ 105,925 $ (27,597) $ 78,328 Year ended December 31, 2019 (In thousands) Amount Tax Benefit (Expense) Amount Securities available-for-sale: Net unrealized holding gains arising during the year $ 120,333 $ (31,686) $ 88,647 Reclassification adjustment for net realized gains included in net income (29) 7 (22) Total securities available-for-sale 120,304 (31,679) 88,625 Derivative instruments: Net unrealized (losses) arising during the year (6,672) 1,727 (4,945) Reclassification adjustment for net realized losses included in net income 6,832 (1,758) 5,074 Total derivative instruments 160 (31) 129 Defined benefit pension and other postretirement benefit plans: Net actuarial gain arising during the year 2,202 (580) 1,622 Reclassification adjustment for net actuarial loss amortization included in net income 5,706 (1,502) 4,204 Total defined benefit pension and postretirement benefit plans 7,908 (2,082) 5,826 Other comprehensive income, net of tax $ 128,372 $ (33,792) $ 94,580

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2021
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Matters	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 allowance for credit losses. At December 31, 2021 and 2020, both Webster Financial Corporation and Webster Bank were classified as well-capitalized. Management believes that no events or changes have occurred subsequent to year-end that would change this designation. The following table provides information on the capital ratios for Webster Financial Corporation and Webster Bank: 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 At December 31, 2020 Actual (1) Minimum Requirement Well Capitalized (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Webster Financial Corporation CET1 risk-based capital $ 2,543,131 11.35 % $ 1,008,512 4.5 % $ 1,456,739 6.5 % Total risk-based capital 3,045,652 13.59 1,792,910 8.0 2,241,137 10.0 Tier 1 risk-based capital 2,688,168 11.99 1,344,682 6.0 1,792,910 8.0 Tier 1 leverage capital 2,688,168 8.32 1,291,980 4.0 1,614,975 5.0 Webster Bank CET1 risk-based capital $ 2,791,474 12.46 % $ 1,008,027 4.5 % $ 1,456,039 6.5 % Total risk-based capital 3,071,505 13.71 1,792,048 8.0 2,240,060 10.0 Tier 1 risk-based capital 2,791,474 12.46 1,344,036 6.0 1,792,048 8.0 Tier 1 leverage capital 2,791,474 8.65 1,291,415 4.0 1,614,268 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 ending on January 1, 2022, and subsequent three-year transition period ending on December 31, 2024. As a result, capital ratios and amounts exclude the impact of the increased ACL on loans and leases, held-to-maturity debt securities, and unfunded loan commitments attributed 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. 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. During the years ended December 31, 2021 and 2020, Webster Bank paid $200.0 million and $20.0 million in dividends to Webster Financial Corporation, to which no express approval from the OCC was required. Cash Restrictions

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2021
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: Years ended December 31, (In thousands, except per share data) 2021 2020 2019 Earnings for basic and diluted earnings per common share: Net income $ 408,864 $ 220,621 $ 382,723 Less: Preferred stock dividends 7,875 7,875 7,875 Net income available to common shareholders 400,989 212,746 374,848 Less: Earnings allocated to participating securities 2,302 1,272 1,863 Earnings applicable to common shareholders $ 398,687 $ 211,474 $ 372,985 Shares: Weighted-average common shares outstanding - basic 89,983 89,967 91,559 Effect of dilutive securities (1) 223 184 323 Weighted-average common shares outstanding - diluted 90,206 90,151 91,882 Earnings per common share: Basic $ 4.43 $ 2.35 $ 4.07 Diluted 4.42 2.35 4.06 (1) Includes stock options and performance-based restricted stock for all periods presented. 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 non-forfeitable dividends during the vesting period on a basis equivalent to the dividends paid to holders of common stock. These unvested awards meet the definition of participating securities.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
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, by 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. An asset or liability's fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques maximize the use of relevant observable inputs and minimize the use of unobservable inputs. 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 valuation 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. Agency collateralized mortgage obligations (Agency CMO), Agency MBS, Agency CMBS, CMBS, CLO, and corporate debt 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 residential mortgage loans held for sale at fair value under the fair value option per ASC Topic 825, Financial Instruments . Electing to measure originated residential mortgage 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 residential mortgage loans held for sale is based on quoted market prices of similar loans sold in conjunction with securitization transactions. Accordingly, originated residential mortgage loans held for sale are classified within Level 2 of the fair value hierarchy. The following table compares the fair value to unpaid principal balance of originated residential mortgage loans held for sale: At December 31, 2021 2020 (In thousands) Fair Value Unpaid Principal Balance Difference Fair Value Unpaid Principal Balance Difference Originated loans held for sale $ 4,694 $ 5,034 $ (340) $ 14,000 $ 13,511 $ 489 Investments Held in Rabbi Trust. Investments held in the Rabbi Trust consist primarily of mutual funds that invest in equity and fixed income securities. Shares of these mutual funds are valued based on the NAV as reported by the trustee of the funds, which represent quoted prices in active markets. Webster has elected to measure the investments held in the Rabbi Trust at fair value. Accordingly, investments held in the Rabbi Trust are classified within Level 1 of the fair value hierarchy. At December 31, 2021, the cost basis of the investments held in the Rabbi Trust was $1.6 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 December 31, 2021, equity investments with a readily determinable fair value had a carrying amount of $1.9 million and no remaining unfunded commitment. During the year ended December 31, 2021, there was a net change in fair value of $0.5 million associated with these alternative investments. Equity investments that do not have a readily determinable 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 December 31, 2021, these alternative investments had a carrying amount of $25.9 million and a remaining unfunded commitment of $14.1 million. The following table summarizes the fair values of assets and liabilities measured at fair value on a recurring basis: 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 At December 31, 2020 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets: Available-for-sale investment securities: Agency CMO $ — $ 154,613 $ — $ 154,613 Agency MBS — 1,457,409 — 1,457,409 Agency CMBS — 1,117,233 — 1,117,233 CMBS — 508,018 — 508,018 CLO — 76,383 — 76,383 Corporate debt — 13,120 — 13,120 Total available-for-sale investment securities — 3,326,776 — 3,326,776 Gross derivative instruments, before netting (1) 205 338,853 — 339,058 Originated loans held for sale — 14,000 — 14,000 Investments held in Rabbi Trust 4,811 — — 4,811 Alternative investments (2) — — — 11,112 Total financial assets held at fair value $ 5,016 $ 3,679,629 $ — $ 3,695,757 Financial Liabilities: Gross derivative instruments, before netting (1) $ 218 $ 12,472 $ — $ 12,690 (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 in Note 17: 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 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 December 31, 2021, the carrying amount of these alternative investments was $25.8 million, of which $5.8 million are considered to be measured at fair value as a result of $4.4 million in write-ups due to observable price changes and a $0.3 million write-down due to impairment during the current period. 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. 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 December 31, 2021, the total book value of OREO and repossessed assets was $2.8 million. In addition, the amortized cost of consumer loans secured by residential real estate property that are in the process of foreclosure at December 31, 2021 was $7.5 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, 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 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. 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 December 31, 2021 2020 (In thousands) Carrying Fair Carrying Fair Assets: Level 1 Cash and cash equivalents $ 461,570 $ 461,570 $ 263,104 $ 263,104 Level 2 Held-to-maturity investment securities 6,198,125 6,280,936 5,567,889 5,835,364 Level 3 Loans and leases, net 21,970,542 21,702,732 21,281,784 21,413,397 Mortgage servicing assets 9,237 12,527 13,422 14,362 Liabilities: Level 2 Deposit liabilities $ 28,049,259 $ 28,049,259 $ 24,847,618 $ 24,847,618 Time deposits 1,797,770 1,794,829 2,487,818 2,494,601 Securities sold under agreements to repurchase and other borrowings 674,896 676,581 995,355 1,000,189 FHLB advances 10,997 11,490 133,164 139,035 Long-term debt (1) 562,931 515,912 567,663 538,407

Retirement Benefit Plans

Retirement Benefit Plans	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Retirement Benefit Plans	Retirement Benefit Plans Defined Benefit Pension and Postretirement Benefit Plans Webster Bank had offered a qualified noncontributory defined benefit pension plan and a SERP to eligible employees and key executives who met certain age and service requirements. Both the pension plan and the SERP were frozen effective December 31, 2007. Only those employees who were hired prior to January 1, 2007 and who became participants of the plans prior to January 1, 2008 have accrued benefits under the plans. Webster Bank also provides for other post-employment medical and life insurance benefits (OPEB) to certain retired employees. The plans' measurement date coincides with Webster's December 31 fiscal year end. The following table summarizes the changes in the benefit obligation, fair value of plan assets, and funded status of the defined benefit pension and postretirement benefit plans at December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2021 2020 2021 2020 Change in benefit obligation: Beginning balance $ 266,414 $ 241,404 $ 2,046 $ 1,935 $ 1,998 $ 2,399 Interest cost 4,663 6,511 30 46 19 46 Actuarial (gain) loss (11,131) 27,376 (77) 194 32 (307) Benefits paid (9,683) (8,877) (126) (129) (145) (140) Ending balance 250,263 266,414 1,873 2,046 1,904 1,998 Change in plan assets: Beginning balance 266,268 239,621 — — — — Actual return on plan assets 15,261 35,524 — — — — Employer contributions — — 126 129 145 140 Benefits paid (9,683) (8,877) (126) (129) (145) (140) Ending balance 271,846 266,268 — — — — Funded status (1) $ 21,583 $ (146) $ (1,873) $ (2,046) $ (1,904) $ (1,998) (1) The overfunded (underfunded) status of each plan is respectively included in accrued interest receivable and other assets or accrued expenses and other liabilities on the accompanying Consolidated Balance Sheets, as applicable. The following table summarizes the weighted-average assumptions used to determine the benefit obligation at December 31: Pension Plan SERP OPEB 2021 2020 2021 2020 2021 2020 Discount rate 2.65 % 2.29 % 2.45 % 1.91 % 1.99 % 1.40 % Assumed healthcare cost trend rate n/a n/a n/a n/a 6.25 % 6.50 % The following table summarizes the amounts recorded in accumulated other comprehensive (loss) income that have not yet been recognized in net periodic benefit (income) cost at December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2021 2020 2021 2020 Net actuarial loss (gain) $ 41,792 $ 57,902 $ 658 $ 773 $ (620) $ (690) Deferred tax benefit (expense) 8,636 12,881 136 172 (128) (153) Net amount recorded in (AOCL) AOCI $ 33,156 $ 45,021 $ 522 $ 601 $ (492) $ (537) The following table summarizes the components of net periodic benefit (income) cost for the years ended December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2019 2021 2020 2019 2021 2020 2019 Interest cost 4,663 6,511 7,941 30 46 65 19 46 85 Expected return on plan assets (14,385) (13,522) (11,436) — — — — — — Amortization of actuarial (gain) loss 4,102 4,027 5,705 38 23 14 (38) (74) (13) Net periodic benefit (income) cost (1) $ (5,620) $ (2,984) $ 2,210 $ 68 $ 69 $ 79 $ (19) $ (28) $ 72 (1) Net periodic benefit (income) cost is included in other non-interest expense on the accompanying Consolidated Statements of Income. The following table summarizes the weighted-average assumptions used to determine net periodic benefit (income) cost for the years ended December 31: Pension Plan SERP OPEB 2021 2020 2019 2021 2020 2019 2021 2020 2019 Discount rate 2.29 % 3.07 % 4.12 % 1.91 % 2.82 % 3.95 % 1.40 % 2.50 % 3.69 % Expected long-term rate of return on 5.50 % 5.75 % 6.00 % n/a n/a n/a n/a n/a n/a Assumed healthcare cost trend rate (1) n/a n/a n/a n/a n/a n/a 6.50 % 6.50 % 6.50 % (1) The assumed healthcare cost trend rate used to measure the expected cost of benefits covered by the OPEB for 2022 is 6.25%. The rate to which the healthcare cost trend rate is assumed to decline (ultimate trend rate) along with the year that the ultimate trend rate will be reached is 4.40% in 2030. The discount rates used to determine the benefit obligation and net periodic benefit (income) cost for Webster's defined benefit pension and postretirement benefit plans were selected by reference to a high-quality bond yield curve, using a full yield curve approach, and matched to the timing and amount of each plan's expected benefit payments. The following table summarizes amounts recognized in other comprehensive (loss) income, including reclassification adjustments, for the years ended December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2019 2021 2020 2019 2021 2020 2019 Net actuarial (gain) loss $ (12,008) $ 5,375 $ (2,263) $ (77) $ 194 $ 164 $ 33 $ (307) $ (103) Amounts reclassified from (4,102) (4,027) (5,705) (38) (23) (14) 38 74 13 Total (gain) loss recognized in $ (16,110) $ 1,348 $ (7,968) $ (115) $ 171 $ 150 $ 71 $ (233) $ (90) At December 31, 2021, the expected future benefit payments for the defined benefit pension and postretirement benefits plans are as follows: (In thousands) Pension Plan SERP OPEB 2022 $ 9,969 $ 116 $ 270 2023 10,345 117 247 2024 10,787 128 224 2025 11,207 126 201 2026 11,587 124 179 Thereafter 62,419 581 609 Asset Management The pension plan invests primarily in common collective trusts and registered investment companies. However, the pension plan's investment policy guidelines also allow for the investment in cash and cash equivalents, fixed income securities, and equity securities. Common collective trusts and registered investment companies are both benchmarked against the Standard & Poor's 500 Index. Incremental benchmarks used to assess the common collective trusts include the S&P 400 Mid Cap Index, Russell 200 Index, MSCI ACWI ex U.S. Index, and the Barclay's Capital U.S. Long Credit Index. The standard deviation should not exceed that of the composite index. The pension plan's investment strategy and asset allocations are monitored by the Company's Retirement Plans Committee with the assistance of external investment advisors, and the investment portfolio is rebalanced, as appropriate. The target asset allocation percentages for the year ended December 31, 2021 were 64.5% fixed-income investments and 35.5% equity investments. The actual asset allocation percentages for the year ended December 31, 2021 were 63.6% fixed-income investments, 35.7% equity investments, and 0.7% cash and cash equivalents. The overall investment objective of the pension plan is to maintain a diversified portfolio with a targeted expected long-term rate of return on plan assets of approximately 5.50%. The expected long-term rate of return on plans assets is the average rate of return expected to be realized on funds invested or expected to be invested to provide for the benefits included in the benefit obligation. The expected long-term rate of return on plans assets is established at the beginning of the year based upon historical and projected returns for each asset category. Depending on market conditions, the expected long-term rate of return on plan assets may exceed or fall short of the targeted percentage. Fair Value Measurement The following is a description of the valuation methodologies used for the pension plan's assets measured at fair value: Common Collective Trusts. Common collective trusts are valued based on the NAV as reported by the trustee of the funds. The funds' underlying investments, which primarily comprise fixed-income debt securities and open-end mutual funds, are valued using quoted market prices in active markets or unobservable inputs for similar assets. Therefore, common collective trusts are classified as Level 2 within the fair value hierarchy. Transactions may occur daily within a trust. If a full redemption of the trust were to be initiated, the investment advisor reserves the right to temporarily delay withdrawals from the trust in order to ensure that the liquidation of securities is carried out in an orderly business manner. Registered Investment Companies. Registered investment companies are valued at the daily closing price as reported by the funds. Registered investment companies held by the pension plan are quoted in an active market and are classified as Level 1 within the fair value hierarchy. Cash and Cash Equivalents. Cash and cash equivalents are recorded at cost plus accrued interest, which approximates fair value given the short time frame to maturity, and are classified as Level 1 within the fair value hierarchy. The following table sets forth by level within the fair value hierarchy the pension plan's assets at fair value: At December 31, 2021 2020 (In thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Common collective trusts — 230,923 — 230,923 — 225,762 — 225,762 Registered investment companies $ 39,082 $ — $ — $ 39,082 $ 39,645 $ — $ — $ 39,645 Cash and cash equivalents 1,841 — — 1,841 861 — — 861 Total pension plan assets $ 40,923 $ 230,923 $ — $ 271,846 $ 40,506 $ 225,762 $ — $ 266,268 Multiple-Employer Defined Benefit Pension Plan Webster Bank participates in a multi-employer plan that provides pension benefits to former employees of a bank acquired by the Company. Participation in the plan was frozen as of September 1, 2004. The plan maintains a single trust and does not segregate the assets or liabilities of its participating employers. Minimum required employer contributions are determined by an independent actuary and are calculated using a 7-year shortfall amortization factor. There are no collective bargaining agreements or other obligations requiring contributions to the plan, nor has a funding improvement plan been implemented. The following table summarizes information related to Webster Bank's participation in the multi-employer plan: (Dollars in thousands) Contributions Funded Status Plan Name Employer Identification Number Plan Number Surcharge Imposed 2021 2020 2019 2021 2020 Pentegra Defined Benefit Plan 13-5645888 333 No $692 $998 $863 At least 80% At least 80% Webster Bank's contributions to the multi-employer plan for the years ended December 31, 2021, 2020, and 2019 did not exceed more than 5% of total plan contributions for the plan years ended June 30, 2020, 2019, and 2018. The plan's Form 5500 was not available for the plan year ended June 30, 2021 as of the date Webster's Consolidated Financial Statements were issued. As of July 1, 2021, the date of the most recent actuarial valuation, the plan administrator confirmed that Webster Bank’s portion of the multi-employer plan was $0.5 million overfunded. Webster Bank Retirement Savings Plan

Share-Based Plans

Share-Based Plans	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Plans	Note 20: Share-Based Plans Webster maintains stock compensation plans consisting of restricted stock awards, stock options, and stock appreciation rights, with shareholder approval for up to 13.4 million shares of common stock, to better align the interests of its employees and directors with those of its shareholders. At December 31, 2021, there were 4.3 million shares of common stock available for grant, and no stock appreciation rights had been granted. Stock compensation expense is recognized over the required service vesting period for each award based on the grant-date fair value, net of estimated forfeitures, and is included as a component of compensation and benefits on the accompanying Consolidated Statements of Income. The following table summarizes stock-based compensation plan activity for the year ended December 31, 2021: Non-Vested Restricted Stock Awards Outstanding Stock Options Outstanding Time-Based Performance-Based Number of Weighted-Average Number of Weighted-Average Number of Weighted-Average Balance at January 1, 2021 547,185 $ 46.59 250,666 $ 48.77 410,701 $ 23.35 Granted 195,749 54.60 83,853 54.68 — — Vested 186,211 48.93 65,213 51.99 — — Forfeited 27,439 46.65 2,889 50.45 — — Exercised — — — — 303,089 23.45 Balance at December 31, 2021 529,284 48.77 266,417 50.03 107,612 23.05 Restricted Stock Awards Time-based restricted stock awards vest over the applicable service period ranging from one Performance-based restricted stock awards vest after a three year performance period with a share quantity dependent on the Company's performance during that period, ranging from 0% to 150%. The total grant date fair value of performance-based restricted stock awards that had vested during the years ended December 31, 2021, 2020, and 2019 was $12.5 million, $13.5 million, and $12.5 million, respectively. The fair value of performance-based restricted stock awards used to determine compensation expense is calculated using the Monte-Carlo simulation model, which allows for the incorporation of performance conditions where 50% of the performance-based shares are based on total shareholder return as compared to Webster's compensation peer group, and where the remaining 50% of the performance-based shares are based on Webster's average return on equity during the three year vesting period. Compensation expense is subject to adjustment based on management's assessment of Webster's return on equity performance relative to the target number of shares condition. For the years ended December 31, 2021, 2020, and 2019, Webster recognized stock compensation expense, all of which pertained to its restricted stock awards, of $13.7 million, $12.2 million, and $12.6 million, respectively. The corresponding income tax benefit recognized was $5.4 million, $2.6 million, and $6.1 million for 2021, 2020, and 2019, respectively. At December 31, 2021 there was $16.0 million of unrecognized restricted stock expense related to non-vested restricted stock awards, which is expected to be recognized over a weighted-average period of 1.8 years. Stock Options There have been no stock options granted since 2013. Prior to that date, stock options were granted at an exercise price equal to the market value of Webster's common stock on the grant date. Each stock option grants the holder the right to acquire one share of Webster common stock over a contractual life of up to 10 years. At December 31, 2021, there were no incentive stock options outstanding and 107,612 non-qualified stock options outstanding, all of which are exercisable and have a weighted-average remaining contractual life of 1.1 years. The total pre-tax intrinsic value of $3.5 million at December 31, 2021, or the difference between Webster's closing stock price on the last trading day of the year and the weighted-average exercise price multiplied by the number of shares, represents the aggregate intrinsic value that would have been received by the option holders had all of their outstanding vested options been exercised on December 31, 2021. For the years ended December 31, 2021, 2020, and 2019, the total intrinsic value of the options exercised was $9.0 million, $0.1 million, and $2.4 million, respectively.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2021
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 Retail 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, 2021, management realigned certain of Webster's business banking and investment services operations to better serve its customers and deliver operational efficiencies. Under this realignment, the previously reported Community Banking segment was renamed Retail Banking, and $131.0 million of goodwill was reallocated, on a relative fair value basis, from Retail Banking to Commercial Banking. There was no goodwill impairment as a result of the reorganization. Prior period amounts have been recasted to reflect the realignment. 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 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 Company’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 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 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 a full-absorption costing process. Costs, including corporate overhead, are analyzed, pooled by process, and assigned to the appropriate reportable segment. The results of funds transfer pricing and allocations for non-interest expense, as well as non-interest income produces PPNR, under which 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. Business development expenses, such as merger-related and strategic initiatives costs, are also generally included in the Corporate and Reconciling category. The following table presents balance sheet information, including the appropriate allocations, for Webster's reportable segments and the Corporate and Reconciling category: At December 31, 2021 (In thousands) Commercial HSA Retail Corporate and Consolidated Goodwill $ 131,000 $ 21,813 $ 385,560 $ — $ 538,373 Total assets 15,400,886 73,564 7,663,218 11,777,931 34,915,599 At December 31, 2020 (In thousands) Commercial HSA Retail Corporate and Consolidated Goodwill $ 131,000 $ 21,813 $ 385,560 $ — $ 538,373 Total assets 14,732,792 80,352 7,726,287 10,051,259 32,590,690 The following tables present operating results, including the appropriate allocations, for Webster’s reportable segments and the Corporate and Reconciling category: Year ended December 31, 2021 (In thousands) Commercial HSA Retail Corporate and Consolidated Net interest income $ 587,485 $ 168,595 $ 373,130 $ (228,121) $ 901,089 Non-interest income 112,270 102,814 67,155 41,133 323,372 Non-interest expense 257,461 135,997 296,260 55,382 745,100 Pre-tax, pre-provision net revenue 442,294 135,412 144,025 (242,370) 479,361 (Benefit) for credit losses (51,348) — (3,068) (84) (54,500) Income (loss) before income taxes 493,642 135,412 147,093 (242,286) 533,861 Income tax expense (benefit) 124,891 36,155 32,361 (68,410) 124,997 Net income (loss) $ 368,751 $ 99,257 $ 114,732 $ (173,876) $ 408,864 Year ended December 31, 2020 (In thousands) Commercial HSA Retail Corporate and Consolidated Net interest income $ 515,027 $ 162,363 $ 331,821 $ (117,818) $ 891,393 Non-interest income 90,498 100,826 74,147 19,806 285,277 Non-interest expense 260,953 140,637 317,215 40,141 758,946 Pre-tax, pre-provision net revenue 344,572 122,552 88,753 (138,153) 417,724 Provision (benefit) for credit losses 152,571 — (14,722) (99) 137,750 Income (loss) before income taxes 192,001 122,552 103,475 (138,054) 279,974 Income tax expense (benefit) 46,848 32,721 22,558 (42,774) 59,353 Net income (loss) $ 145,153 $ 89,831 $ 80,917 $ (95,280) $ 220,621 Year ended December 31, 2019 (In thousands) Commercial HSA Retail Corporate and Consolidated Net interest income $ 476,779 $ 172,685 $ 347,377 $ (41,714) $ 955,127 Non-interest income 91,184 97,041 77,149 19,941 285,315 Non-interest expense 252,485 135,586 317,494 10,385 715,950 Pre-tax, pre-provision net revenue 315,478 134,140 107,032 (32,158) 524,492 Provision for credit losses 29,714 — 8,086 — 37,800 Income (loss) before income taxes 285,764 134,140 98,946 (32,158) 486,692 Income tax expense (benefit) 70,298 35,547 20,581 (22,457) 103,969 Net income (loss) $ 215,466 $ 98,593 $ 78,365 $ (9,701) $ 382,723

Revenue from contracts with Cus

Revenue from contracts with Customers Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers The following tables summarize revenues recognized in accordance with ASC Topic 606, Revenue from Contracts with Customers, along with other sources of non-interest income that subject to other GAAP topics, by reportable segment: Year ended December 31, 2021 (In thousands) Commercial HSA Retail Corporate and Consolidated Non-interest Income: Deposit service fees $ 16,946 $ 94,844 $ 50,548 $ 372 $ 162,710 Wealth and investment services 39,623 — — (37) 39,586 Other 1,237 7,970 903 — 10,110 Revenue from contracts with customers 57,806 102,814 51,451 335 212,406 Other sources of non-interest income 54,464 — 15,704 40,798 110,966 Total non-interest income $ 112,270 $ 102,814 $ 67,155 $ 41,133 $ 323,372 Year ended December 31, 2020 (In thousands) Commercial HSA Retail Corporate and Consolidated Non-interest Income: Deposit service fees $ 14,744 $ 92,693 $ 48,489 $ 106 $ 156,032 Wealth and investment services 32,951 — — (35) 32,916 Other 1,174 8,133 482 — 9,789 Revenue from contracts with customers 48,869 100,826 48,971 71 198,737 Other sources of non-interest income 41,629 — 25,176 19,735 86,540 Total non-interest income $ 90,498 $ 100,826 $ 74,147 $ 19,806 $ 285,277 Year ended December 31, 2019 (In thousands) Commercial HSA Retail Corporate and Consolidated Non-interest Income: Deposit service fees $ 15,694 $ 92,096 $ 60,014 $ 218 $ 168,022 Wealth and investment services 32,967 — — (35) 32,932 Other 1,151 4,945 1,243 — 7,339 Revenue from contracts with customers 49,812 97,041 61,257 183 208,293 Other sources of non-interest income 41,372 — 15,892 19,758 77,022 Total non-interest income $ 91,184 $ 97,041 $ 77,149 $ 19,941 $ 285,315 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 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. Wealth and investment services consist of fees earned from asset management, trust administration, investment advisory services, and through facilitating securities transactions. Performance obligations for asset management and trust administration services are satisfied on a monthly basis at a transaction price based on a percentage of the month-end market value of the assets under administration. Payment for asset management and trust administration services is generally received a few days after month-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 the 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 month. These disaggregated amounts are reconciled to non-interest income as presented within Note 21: Segment Reporting. Contracts with customers did not generate significant contract assets and liabilities at December 31, 2021 and 2020.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
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: At December 31, (In thousands) 2021 2020 Commitments to extend credit $ 6,870,095 $ 6,517,840 Standby letters of credit 224,061 207,201 Commercial letters of credit 58,175 30,522 Total credit-related financial instruments with off-balance sheet risk $ 7,152,331 $ 6,755,563 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 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 the 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: Years ended December 31, (In thousands) 2021 2020 2019 Balance, beginning of period $ 12,755 $ 2,367 $ 2,506 Adoption of CECL — 9,139 — Provision (benefit) 349 1,249 (139) Balance, end of period $ 13,104 $ 12,755 $ 2,367 Litigation Webster is subject to certain legal proceedings and unasserted claims and assessments in the ordinary course of business. Legal contingencies are evaluated based on information currently available, including advice of counsel and assessment of available insurance coverage. The Company establishes an accrual for specific legal matters when it determines that the likelihood of an unfavorable outcome is probable and the loss is reasonably estimable. Once established, each accrual is adjusted to reflect any subsequent developments. Legal contingencies are subject to inherent uncertainties, and unfavorable rulings may occur that could cause Webster to either adjust its litigation accrual or incur actual losses that exceed the current estimate, which ultimately could have a material adverse effect, either individually or in the aggregate, on its business, financial condition, or operating results. Webster will consider settlement of cases when it is in the best interests of the Company and its stakeholders. Webster intends to defend itself in all claims asserted against it, and management currently believes that the outcome of these contingencies will not be material, either individually or in the aggregate, to Webster or its consolidated financial position.

Parent Company Information

Parent Company Information	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Parent Company Information	Parent Company Financial Information The following tables summarize condensed financial information for the Parent Company only: CONDENSED BALANCE SHEETS December 31, (In thousands) 2021 2020 Assets: Cash and due from banks $ 316,193 $ 302,315 Intercompany debt securities 150,000 150,000 Investment in subsidiaries 3,526,782 3,340,556 Alternative investments 20,163 8,970 Other assets 3,953 8,122 Total assets $ 4,017,091 $ 3,809,963 Liabilities and shareholders’ equity: Senior notes $ 485,611 $ 490,343 Junior subordinated debt 77,320 77,320 Accrued interest payable 5,861 5,862 Due to subsidiaries 488 324 Other liabilities 9,486 1,489 Total liabilities 578,766 575,338 Shareholders’ equity 3,438,325 3,234,625 Total liabilities and shareholders’ equity $ 4,017,091 $ 3,809,963 CONDENSED STATEMENTS OF INCOME Years ended December 31, (In thousands) 2021 2020 2019 Income: Dividend income from bank subsidiary $ 200,000 $ 20,000 $ 360,000 Interest on securities and deposits 3,444 5,530 10,728 Alternative investments income (loss) 13,033 2,467 (256) Other non-interest income 75 634 382 Total income 216,552 28,631 370,854 Expense: Interest expense on borrowings 16,876 18,684 21,062 Non-interest expense 32,187 16,426 15,527 Total expense 49,063 35,110 36,589 Income (loss) before income taxes and equity in undistributed earnings of subsidiaries 167,489 (6,479) 334,265 Income tax benefit 3,121 4,572 4,671 Equity in undistributed earnings of subsidiaries 238,254 222,528 43,787 Net income $ 408,864 $ 220,621 $ 382,723 CONDENSED STATEMENTS OF COMPREHENSIVE INCOME Years ended December 31, (In thousands) 2021 2020 2019 Net income $ 408,864 $ 220,621 $ 382,723 Other comprehensive (loss) income, net of tax: Derivative instruments 226 2,622 1,479 Other comprehensive (loss) income of subsidiaries (65,062) 75,706 93,101 Other comprehensive (loss) income, net of tax (64,836) 78,328 94,580 Comprehensive income $ 344,028 $ 298,949 $ 477,303 CONDENSED STATEMENTS OF CASH FLOWS Years ended December 31, (In thousands) 2021 2020 2019 Operating activities: Net income $ 408,864 $ 220,621 $ 382,723 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of subsidiaries (238,254) (222,528) (43,787) Other, net 3,562 29,697 23,681 Net cash provided by operating activities $ 174,172 $ 27,790 $ 362,617 Investing activities: Alternative investments (capital call), net of distributions (6,304) (3,751) (1,850) Investment in subsidiaries — — (296,000) Net cash (used in) investing activities (6,304) (3,751) (297,850) Financing activities: Issuance of long-term debt — — 296,358 Cash dividends paid to common shareholders (145,223) (144,967) (140,783) Cash dividends paid to preferred shareholders (7,875) (7,875) (7,875) Exercise of stock options 3,492 240 619 Common stock repurchased and acquired from stock compensation plan activity (4,384) (80,062) (19,619) Net cash (used in) provided by financing activities (153,990) (232,664) 128,700 Net increase (decrease) in cash and cash equivalents 13,878 (208,625) 193,467 Cash and cash equivalents at beginning of year 302,315 510,940 317,473 Cash and cash equivalents at end of year $ 316,193 $ 302,315 $ 510,940

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsThe Company has evaluated subsequent events from the date of the Consolidated Financial Statements and accompanying Notes thereto through the date of issuance, and determined that, except for the mergers and acquisitions that are discussed within Note 3: Business Developments, no other significant events were identified requiring recognition or disclosure.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with GAAP, and include the accounts of Webster Financial Corporation and all other entities in which the Company has a controlling financial interest. Intercompany transactions and balances have been eliminated in consolidation. Assets that the Company holds or manages in a fiduciary or agency capacity for customers, referred to as assets under administration or assets under management, are not included on the accompanying Consolidated Balance Sheets. Certain prior period amounts have been reclassified to conform to the current year's presentation. These reclassifications did not have a significant impact on the Company's consolidated financial statements.
Variable Interest Entities	Principles of Consolidation The purpose of consolidated financial statements is to present the results of operations and the financial position of the Company and its subsidiaries as if the consolidated group were a single economic entity. In accordance with the applicable accounting guidance for consolidations, the consolidated financial statements include any voting interest entity (VOE) in which the Company has a controlling financial interest and any variable interest entity (VIE) for which the Company is deemed to be the primary beneficiary. The Company generally consolidates its VOEs if the Company, directly or indirectly, owns more than 50% of the outstanding voting shares of the entity and the non-controlling shareholders do not hold any substantive participating or controlling rights. The Company evaluates VIEs to understand the purpose and design of the entity, and its involvement in the ongoing activities of the VIE, and will consolidate the VIE if it has (i) the power to direct the activities of the VIE that most significantly affect the VIE's economic performance, and (ii) an obligation to absorb losses of the VIE, or the right to receive benefits from the VIE, that could potentially be significant to the VIE. The Company accounts for unconsolidated partnerships and certain other investments using the equity method of accounting if it has the ability to significantly influence the operating and financial policies of the investee. This is generally presumed to exist when the Company owns between 20% and 50% of a corporation, or when it has greater than 3% to 5% interest in a limited partnership or similarly structured entity. Additional information regarding consolidated and unconsolidated VIEs can be found within Note 2: Variable Interest Entities. 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.
Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents is comprised of cash and due from banks and interest-bearing deposits. Cash equivalents have a maturity of three months or less. Cash and due from banks includes cash on hand, certain deposits at the FRB of Boston, and cash due from banks. Restricted cash related to Federal Reserve System requirements and cash collateral received on derivative positions are included in cash and due from banks. Interest-bearing deposits includes deposits at the FRB of Boston in excess of reserve requirements, if any, and federal funds sold to other financial institutions. Federal funds sold essentially represents an uncollateralized loan. Therefore, the Company regularly evaluates the credit risk associated with the other financial institutions to ensure that Webster does not become exposed to any significant credit risk on these cash equivalents.
Investment Securities	Investments in Debt Securities Debt security transactions are recognized on the trade date, which is the date the order to buy or sell the security is executed. Investments in debt securities are classified as available-for-sale or held-to-maturity at the time of purchase. Any classification change subsequent to the trade date is reviewed for compliance with corporate objectives and accounting policies. Debt securities classified as available-for-sale are recorded at fair value with unrealized gains and losses recorded as a component of other comprehensive income (OCI) or other comprehensive loss (OCL). If a debt security is transferred from available-for-sale to held-to-maturity, it is recorded at fair value at the time of transfer and any respective gain or loss would be recorded as a separate component of OCI or OCL and amortized as an adjustment to interest income over the remaining life of the security. Debt securities classified as available-for-sale are reviewed for credit losses when the fair value of a security falls below the amortized cost basis and the decline is evaluated to determine if any portion is attributable to credit loss. The decline in fair value attributable to credit loss is recorded directly to earnings, with a corresponding allowance for credit loss, limited to the amount that fair value is less than the amortized cost. If the credit quality subsequently improves, previously recorded allowance amounts may be reversed. An available-for-sale debt security will be placed on non-accrual status if collection of principal and interest in accordance with contractual terms is doubtful. When the Company intends to sell an impaired available-for-sale debt security, or if it is more likely than not that the Company will be required to sell the security prior to recovery of the amortized cost basis, the entire fair value adjustment will immediately be recognized in earnings through non-interest income. The gain or loss on sale is calculated using the carrying value plus any related accumulated OCI or OCL balance associated with the securities sold. Debt securities classified as held-to-maturity are those in which Webster has the ability and intent to hold to maturity. Debt securities classified as held-to-maturity are recorded at amortized cost net of unamortized premiums and discounts. Discount accretion income and premium amortization expense are recognized as interest income using the effective interest method, with consideration given to prepayment assumptions on mortgage backed securities. Premiums are amortized to the earliest call date for debt securities purchased at a premium, with explicit, non-contingent call features and are callable at a fixed price and preset date. Debt securities classified as held-to-maturity are reviewed for credit losses under the CECL model with an allowance recorded on the balance sheet for expected lifetime credit losses. The ACL is calculated on a pooled basis using statistical models which include forecasted scenarios of future economic conditions. Forecasts revert to long-run loss rates implicitly through the economic scenario, generally over three years. If the risk for a particular security no longer matches the collective assessment pool, it is removed and individually assessed for credit deterioration. The non-accrual policy for held-to-maturity debt securities is the same as for available-for-sale debt securities. A zero credit loss assumption is maintained for U.S. Treasuries and agency-backed securities in both the available-for-sale and held-to-maturity portfolios, as applicable. This assumption is subject to quarterly review to ensure it remains appropriate. Additional information regarding investments in debt securities can be found within Note 4: Investment Securities. Investments in Equity Securities The Company’s accounting treatment for unconsolidated equity investments differs for those with and without readily determinable fair values. Equity investments with readily determinable fair values are recorded at fair value with changes in fair value recorded in non-interest income. For equity investments without readily determinable fair values, the Company elected the measurement alternative, and therefore carries these investments at cost, less impairment, if any, plus or minus changes in observable prices. Certain equity investments that do not have a readily available fair value may qualify for net asset value (NAV) measurement based on specific requirements. The Company's alternative investments accounted for at NAV consist of investments in non-public entities that generally cannot be redeemed since the Company’s investments are distributed as the underlying equity is liquidated. On a quarterly basis, the Company reviews its equity investments without readily determinable fair values for impairment. If the equity investment is considered impaired, an impairment loss equal to the amount by which the carrying value exceeds its fair value is recorded through a charge to earnings. The impairment loss may be reversed in a subsequent period if there are observable transactions for the identical or similar investment of the same issuer at a higher amount than the carrying amount that was established when the impairment was recognized. Impairments, as well as upward or downward adjustments resulting from observable price changes in orderly transactions for identical or similar investments, are included in non-interest income. Equity investments in entities that finance affordable housing and other community development projects provide a return primarily through the realization of tax benefits. The Company applies the proportional amortization method to account for its investments in qualified affordable housing projects.
Loans Held for Sale	Loans Held for Sale Loans that are classified as held for sale at the time of origination are accounted for under the fair value option. Loans not originated for sale but subsequently transferred to held for sale are valued at the lower of cost or fair value and are valued on an individual asset basis. Any cost amount in excess of fair value is recorded as a valuation allowance and recognized as a reduction of other non-interest income. Gains or losses on the sale of loans held for sale are recorded either as part of mortgage banking activities or other income. Cash flows from the sale of loans that were originated sale are presented as operating cash flows. Cash flows from the sale of loans originated for investment then subsequently transferred to held for sale are presented as investing cash flows. Additional information regarding mortgage banking activities and loans sold can be found within Note 6: Transfers and Servicing of Financial Assets.
Transfers and Servicing of Financial Assets	Transfers and Servicing of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is generally considered to have been surrendered when: (i) the transferred assets are legally isolated from the Company or its consolidated affiliates, even in bankruptcy or other receivership, (ii) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company, and (iii) the Company does not maintain the obligation or unilateral ability to reclaim or repurchase the assets. The Company sells financial assets in the normal course of business, the majority of which are residential mortgage loan sales, primarily to government-sponsored enterprises through established programs, commercial loan sales through participation agreements, and other individual or portfolio loan and securities sales. In accordance with accounting guidance for asset transfers, the Company considers any ongoing involvement with transferred assets in determining whether the assets can be derecognized from the balance sheet. With the exception of servicing, the Company’s continuing involvement with financial assets sold is minimal, and generally is limited to market customary representation and warranty clauses covering certain characteristics of the mortgage loans sold and the Company's origination process. The gain or loss on sale depends on the previous carrying amount of the transferred financial assets, the consideration received, and any other assets obtained or liabilities incurred in exchange for the transferred assets. When the Company sells financial assets, it may retain servicing rights and/or other interests in the financial assets. Servicing assets and any other interests held by the Company are recorded at fair value upon transfer, and subsequently carried at the lower of cost or fair value. Additional information regarding transfers of financial assets and mortgage servicing assets can be found within Note 6: Transfers and Servicing of Financial Assets.
Loans and Leases	Loans and Leases Loans and leases are stated at the principal amount outstanding, net of amounts charged off, unearned income, unamortized premiums and discounts, and deferred loan and lease fees or costs, which are recognized as yield adjustments using the interest method. These yield adjustments are amortized over the contractual life of the related loans and leases and are adjusted for prepayments, as applicable. Interest on loans and leases is credited to interest income as earned based on the interest rate applied to principal amounts outstanding. Cash flows from loans and leases are presented as investing cash flows. Non-accrual Loans Loans and leases are placed on non-accrual status when collection of principal and interest in accordance with contractual terms is doubtful, which generally occurs when principal or interest payments become 90 days delinquent unless the loan or lease is well secured and in the process of collection, or sooner if circumstances indicate that the borrower may be unable to meet contractual principal or interest payments. Residential real estate loans, excluding loans fully insured against loss and in the process of collection, and consumer loans, are placed on non-accrual status at 90 days past due, or at the date when the Company is notified that the borrower is discharged in bankruptcy. Commercial non-mortgage, asset-based, commercial real estate, and equipment finance loans and leases are subject to a detailed review when they reach 90 days past due to determine accrual status, or when payment is uncertain and a specific consideration is made to put a loan or lease on non-accrual status. When loans and leases are placed on non-accrual status, the accrual of interest is discontinued, and any unpaid accrued interest is reversed and charged against interest income. If ultimate repayment of a non-accrual loan or lease is expected, any payments received are applied in accordance with contractual terms. If ultimate repayment is not expected on commercial non-mortgage, asset-based, commercial real estate, and equipment finance loans and leases, any payment received on a non-accrual loan or lease is applied to principal until the unpaid balance has been fully recovered. Any excess is then credited to interest income when received. If the Company determines, through a current valuation analysis, that principal can be recovered on residential real estate and consumer loans, interest payments are taken into income as received on a cash basis.
Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments	Allowance for Credit Losses on Loans and Leases The ACL on loans and leases is a contra-asset account that offsets the amortized cost basis of loans and leases for the credit losses that are expected to occur over the life of the asset. The ACL is established through a provision charged to expense. Executive management reviews and advises on the adequacy of the allowance, which is maintained at a level that management deems sufficient to be sufficient to cover expected credit losses within the loan and lease portfolios. The Company has elected to present accrued interest receivable separately from the amortized cost basis on the consolidated balance sheets and does not estimate an ACL on accrued interest as policies are in place to ensure timely write-offs and non-accruals. The ACL on loans and leases is determined using the CECL model, whereby an expected lifetime credit loss is recognized at the origination or purchase of an asset, including those acquired through a business combination, which is then reassessed at each reporting date over the contractual life of the asset. Generally, expected credit losses are determined through a pooled, collective assessment of loans and leases with similar risk characteristics. However, if the risk characteristics of a loan or lease change such that it no longer matches that of the collectively assessed pool, it is removed from the population and individually assessed for credit losses. The total ACL on loans and leases recorded by management represents the aggregated estimated credit loss determined through both the collective and individual assessments. Collectively Assessed Loans and Leases. Collectively assessed loans and leases are segmented based on product type, credit quality, risk ratings, and/or collateral types within its commercial and consumer portfolios, and expected losses are determined using a Probability of Default (PD), Loss Given Default (LGD), and Exposure at Default (EAD) framework. Expected credit losses are calculated as the product of the probability of a loan defaulting, expected loss given the occurrence of a default, and the expected exposure of a loan at default. Summing the product across loans over their lives yields the lifetime expected credit losses for a given portfolio. The Company’s PD and LGD calculations are predictive models that measure the current risk profile of the loan pools using forecasts of future macroeconomic conditions, historical loss information, and credit risk ratings. The Company employs a dual grade credit risk grading system for estimating the PD and the LGD for its commercial portfolio. 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 s 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 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. For its consumer portfolio, the Company considers factors such as past due status, updated FICO scores, employment status, collateral, geography, loans discharged in bankruptcy, and the status of first lien position loans on second lien position loans, as credit quality indicators. For portfolio monitoring purposes, the Company estimates the current value of property secured as collateral for home equity and residential first mortgage lending products on an ongoing basis. The estimate is based on home price indices compiled by the S&P/Case-Shiller Home Price Indices. Real estate price data is applied to the loan portfolios taking into account the age of the most recent valuation and geographic area. The Company’s models incorporate a single economic forecast scenario and macroeconomic assumptions over a two year reasonable and supportable forecast period. After the reasonable and supportable forecast period, the credit loss model gradually reverts to historical loss rates for the remaining life of the loans and leases on a straight-line basis over a one year reversion period. Historical loss rates are based on approximately 10 years of recently available data and are updated annually. The calculation of EAD follows an iterative process to determine the expected remaining principal balance of a loan based on historical paydown rates for loans of a similar segment within the same portfolio. The calculation of portfolio exposure in future quarters incorporates expected losses and principal paydowns (the combination of contractual repayments and voluntary prepayments). A portion of the collective ACL is comprised of qualitative adjustments for risk characteristics that are not reflected or captured in the quantitative models, but are likely to impact the measurement of estimated credit losses. Macroeconomic variables are used as inputs to the loss models and are selected based on the correlation of the variables to credit losses for each class of financing receivable as follows: the commercial model uses unemployment, gross domestic product, and retail sales (for commercial unfunded); the residential model uses the Case-Shiller Home Price Index; the home equity loan and line of credit models use interest rate spreads between U.S. Treasuries and corporate bonds and, in addition, the home equity loan model also uses the Federal Housing Finance Agency Home Price Index; and the personal loan and credit line models use the Case-Shiller Home Price Index and Federal Housing Finance Agency Home Price Index. There were no changes to the macroeconomic variables used in the loss models in the current year. Forecasted economic scenarios are sourced from a third party. Data from the baseline forecast scenario is used as the input to the modeled loss calculation. Changes in forecasts of macroeconomic variables will impact expectations of lifetime credit losses calculated by the loss models. However, the impact of changes in macroeconomic forecasts may be different for each portfolio and will reflect the credit quality and nature of the underlying assets at that time. To further refine the expected loss estimate, qualitative factors are used reflecting consideration of credit concentration, credit quality trends, the quality of internal loan reviews, the nature and volume of portfolio growth, staffing levels, underwriting exceptions, and other economic considerations that are not reflected in the base loss model. Management may apply additional qualitative adjustments to reflect other relevant facts and circumstances that impact expected credit losses. These economic and qualitative inputs are used to forecast expected losses over the reasonable and supportable forecast period. In addition to the above considerations, the ACL calculation includes expectations of prepayments and recoveries. Extensions, renewals, and modifications are not included in the collective assessment. However, if there is a reasonable expectation of a TDR, the loan is removed from the collective assessment pool and is individually assessed. Individually Assessed Loans and Leases. When loans and leases no longer match the risk characteristics of the collectively assessed pool, they are removed from the collectively assessed population and individually assessed for credit losses. Generally, all non-accrual loans, TDRs, potential TDRs, loans with a charge-off, and collateral dependent loans where the borrower is experiencing financial difficulty, are individually assessed. Individual assessment for collateral dependent commercial loans facing financial difficulty is based on the fair value of the collateral less estimated cost to sell, the present value of the expected cash flows from the operation of the collateral, or a scenario weighted approach of both of these methods. If a loan is not collateral dependent, the individual assessment is based on a discounted cash flow approach. For collateral dependent commercial loans and leases, Webster's process requires the Company to determine the fair value of the collateral by obtaining a third-party appraisal or asset valuation, an interim valuation analysis, blue book reference, or other internal methods. Fair value of the collateral for commercial loans is reevaluated quarterly. Whenever the Company has a third-party real estate appraisal performed by independent licensed appraisers, a licensed in-house appraisal officer or qualified individual reviews these appraisals for compliance with the Financial Institutions Reform Recovery and Enforcement Act and the Uniform Standards of Professional Appraisal Practice. Individual assessments for residential and home equity loans are based on a discounted cash flow approach or the fair value of collateral less the estimated costs to sell. Other consumer loans are individually assessed using a loss factor approach based on historical loss rates. For residential and consumer collateral dependent loans, a third-party appraisal is obtained upon loan default. Fair value of the collateral for residential and consumer collateral dependent loans is reevaluated every six months, by either obtaining a new appraisal or other internal valuation method. Fair value is also reassessed, with any excess amount charged off, for residential and home equity loans that reach 180 days past due per Federal Financial Institutions Examination Council guidelines. A fair value shortfall relative to the amortized cost balance is reflected as a valuation allowance within the ACL on loans and leases. Subsequent to an appraisal or other fair value estimate, should reliable information come to management's attention that the value has declined further, an additional allowance may be recorded to reflect the particular situation, thereby increasing the ACL on loans and leases. If the credit quality subsequently improves, the allowance is reversed up to a maximum of the previously recorded credit losses. Any individually assessed loan for which no specific valuation allowance is necessary is the result of either sufficient cash flow or sufficient collateral coverage relative to the amortized cost. Additional information regarding the ACL on loans and leases can be found within Note 5: Loans and Leases. Before the adoption of CECL on January 1, 2020, the allowance for loan and lease losses (ALLL) was determined under the ALLL incurred loss model, which reflected management’s best estimate of probable losses that may be incurred within the existing loan and lease portfolio as of the related balance sheet date. The ALLL consists of three elements: (i) specific valuation allowances established for probable losses on impaired loans and leases; (ii) quantitative valuation allowances calculated using loss experience for like loans and leases with similar characteristics and trends, adjusted, as necessary, to reflect the impact of current conditions; and (iii) qualitative factors determined based on general economic conditions and other factors that may be internal or external to the Company. The reserve level reflects management’s view of trends in losses, portfolio quality, and economic, political, and regulatory conditions. While management utilized its best judgment based on the information available at the time, the ultimate adequacy of the allowance was dependent upon a variety of factors that were beyond the Company’s control, which included the performance its portfolio, economic conditions, interest rate sensitivity, and other external factors. The process for estimating probable losses under the ALLL approach was based on predictive models that measured the current risk profile of the loan and lease portfolio and combined the measurement with other quantitative and qualitative factors. To measure credit risk for the commercial, commercial real estate, and equipment financing portfolios, the Company employed a dual grade credit risk grading system for estimating the PD and the LGD. The credit risk grade system under the ALLL model is the same as described under the CECL approach. For the Company's consumer portfolio, credit risk factors are also consistent with the factors used in the CECL approach. Back-testing was performed to compare original estimated losses and actual observed losses, resulting in ongoing refinements. The balance resulting from this process, together with specific valuation allowances, determined the overall reserve level. Charge-off of Uncollectible Loans Any loan may be charged-off if a loss confirming event has occurred or if there is a period of extended delinquency. Loss confirming events usually involve the receipt of specific adverse information about the borrower and may include bankruptcy when unsecured, foreclosure, or receipt of an asset valuation indicating a shortfall between the value of the collateral and the book value of the loan when the collateral is the sole source of repayment. The Company generally will charge-off commercial loans when it is determined that the specific loan or a portion thereof is uncollectible. This determination is based on facts and circumstances of the individual loan and normally includes considering the viability of the related business, the value of any collateral, the ability and willingness of any guarantors to perform, and the overall financial condition of the borrower. The Company generally will charge-off residential real estate loans to the estimated fair value of its collateral, net of selling costs, when becoming 180 days past due. Allowance for Credit Losses on Unfunded Loan Commitments The ACL on unfunded loan commitments provides for potential exposure inherent with funding the unused portion of legal commitments to lend that are not unconditionally cancellable by the Company. Accounting for unfunded loan commitments follows the CECL model. The calculation of the allowance 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 the ACL methodology for funded loans using the PD and LGD applied to the underlying borrower risk and facility grades, a draw down factor applied to utilization rates, relevant forecast information, and management's qualitative factors. The ACL on unfunded credit commitments is included within accrued expenses and other liabilities on the accompanying Consolidated Balance Sheets and the related credit expense is reported as a component of other non-interest expense on the accompanying Consolidated Statements of Income. Additional information regarding the ACL on unfunded loan commitments can be found within Note 23: Commitments and Contingencies.
Troubled Debt Restructurings	Troubled Debt Restructurings A modified loan is considered a TDR when the following two conditions are met: (i) the borrower is experiencing financial difficulty, and (ii) the modification constitutes a concession. The Company considers all aspects of the restructuring in determining whether a concession has been granted, including the borrower's ability to access funds at a market rate. In general, a concession exists when the modified terms of the loan are more attractive to the borrower than standard market terms. Modified terms are dependent upon the financial position and needs of the individual borrower. The most common types of modifications include covenant modifications and forbearance. Loans for which the borrower has been discharged under Chapter 7 bankruptcy are considered collateral dependent TDRs, impaired at the date of discharge, and charged down to the fair value of collateral less cost to sell, if management considers that loss potential likely exists.
Foreclosed and Repossessed Assets	Foreclosed and Repossessed Assets Real estate acquired through foreclosure or completion of a deed in lieu of foreclosure and other assets acquired through repossession are recorded at fair value less estimated cost to sell at the date of transfer. Subsequent to the acquisition date, the foreclosed and repossessed assets are carried at the lower of cost or fair value less estimated selling costs and are included within other assets on the accompanying Consolidated Balance Sheets. Independent appraisals generally are obtained to substantiate fair value and may be subject to adjustment based upon historical experience or specific geographic trends impacting the property. Upon transfer to other real estate owned (OREO), the excess of the loan balance over fair value less cost to sell is charged off against the ACL. Subsequent write-downs in value, maintenance costs as incurred, and gains or losses upon sale are charged to non-interest expense on the accompanying Consolidated Statements of Income.
Premises and Equipment	Property and Equipment Property and equipment is carried at cost, less accumulated depreciation and amortization. Depreciation and amortization is computed on a straight-line basis over the estimated useful lives of the assets, as illustrated in the following table. If shorter, leasehold improvements are amortized over the terms of the respective leases. Minimum Maximum Building and Improvements 5 - 40 years Leasehold improvements 5 - 20 years Fixtures and equipment 5 - 10 years Data processing and software 3 - 7 years Repairs and maintenance costs are expensed as incurred, while significant improvements are capitalized. Property and equipment that is actively marketed for sale is reclassified to assets held for disposition. The cost and accumulated depreciation and amortization of property and equipment that is sold, retired, or otherwise disposed of, is eliminated from accounts and any resulting gain or loss is recorded as non-interest income or non-interest expense, respectively, on the accompanying Consolidated Statements of Income Additional information regarding property and equipment can be found within Note 7: Premises and Equipment. Leasing A ROU asset and corresponding lease liability are recognized at the lease commencement date when the Company is a lessee. ROU lease assets are included in premises and equipment on the accompanying Consolidated Balance Sheets. A ROU asset reflects the present value of the future minimum lease payments adjusted for any initial direct costs, incentives, or other payments prior to the lease commencement date. A lease liability represents a legal obligation to make lease payments and is determined by the present value of the future minimum lease payments, discounted using the rate implicit in the lease or the Company’s incremental borrowing rate. Variable lease payments that are dependent on an index or rate are initially measured using the index or rate at the commencement date and are included in the measurement of the lease liability. Renewal options are not included as part of the ROU asset or lease liability unless the option is deemed reasonably certain to exercise. For real estate leases, lease components and non-lease components are accounted for as a single lease component. For equipment leases, lease and non-lease components are accounted for separately. Operating lease expense is comprised of operating lease costs and variable lease costs, net of sublease income, and is reflected as part of occupancy within non-interest expense on the accompanying Consolidated Statements of Income. Operating lease expense is recorded on a straight-line basis. Additional information regarding the Company's lessee arrangements can be found within Note 8: Leasing.
Goodwill	Goodwill Goodwill represents the excess purchase price of businesses acquired over the fair value of the identifiable net assets acquired and is assigned to specific reporting units. Goodwill is not subject to amortization but rather is evaluated for impairment annually, or more frequently if events occur or circumstances change indicating it would more likely than not result in a reduction of the fair value of the reporting units below their carrying value, including goodwill. Goodwill may be evaluated for impairment by performing a qualitative assessment. If the qualitative assessment indicates that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill, or, if for any other reason the Company determines to it be appropriate, then a quantitative assessment will be performed. The quantitative assessment process utilizes an income and market approach to arrive at an indicated fair value range for the reporting units. The fair value calculated for each reporting unit is compared to its carrying amount, including goodwill, to ascertain if goodwill impairment exists. If the fair value exceeds the carrying amount, including goodwill for a reporting unit, it is not considered impaired. If the fair value is below the carrying amount, including goodwill for a reporting unit, then an impairment charge is recognized for the amount by which the carrying amount exceeds the calculated fair value, up to but not exceeding the amount of goodwill allocated to the reporting unit. The resulting amount is charged to non-interest expense on the accompanying Consolidated Statements of Income. The Company completed a qualitative assessment for its reporting units during its most recent annual impairment review. Based on this qualitative assessment, the Company determined that there was no evidence of impairment to the balance of its goodwill. Additional information regarding goodwill can be found within Note 9: Goodwill and Other Intangible Assets.
Other Intangible Assets	Other Intangible Assets Other intangible assets represent purchased assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights, or because it is capable of being sold or exchanged either separately or in combination with a related contract, asset, or liability. Other intangible assets with finite useful lives, such as core deposits and customer relationships, are amortized to non-interest expense over their estimated useful lives and are evaluated for impairment whenever events occur or circumstances change indicating the carrying amount of the asset may not be recoverable. Additional information regarding other intangible assets can be found within Note 9: Goodwill and Other Intangible Assets.
Cash Surrender Value of Life Insurance	Cash Surrender Value of Life Insurance Bank-owned life insurance represents the cash surrender value of life insurance policies on certain current and former employees of Webster. Cash surrender value increases and decreases are recorded in non-interest income. Death benefit proceeds in excess of the cash surrender value are recorded in other non-interest income upon the death of the insured.
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase These agreements are accounted for as secured financing transactions since Webster maintains effective control over the transferred investment securities and the transfer meets the other criteria for such treatment. Obligations to repurchase the sold investment securities are reflected as a liability on the accompanying Consolidated Balance Sheets. The investment securities sold with agreement to repurchase to wholesale dealers are transferred to a custodial account for the benefit of the dealer or to the bank with whom each transaction is executed. The dealers or banks may sell, loan, or otherwise hypothecate such securities to other parties in the normal course of their operations and agree to resell to Webster the same securities at the maturity date of the agreements. Webster also enters into repurchase agreements with Bank customers. The investment securities sold with agreement to repurchase to Bank customers are not transferred, but internally pledged to the repurchase agreement transaction. Additional information regarding securities sold under agreements to repurchase can be found within Note 12: Borrowings.
Revenue Recognition for Alternative Revenue Programs, Policy [Policy Text Block]	Revenue From Contracts With Customers Revenue from contracts with customers comprises non-interest income earned in exchange for services provided to customers and is recognized either when services are completed or as they are rendered. These revenue streams include deposit service fees, wealth and investment services, and an insignificant portion of other non-interest income on the accompanying Consolidated Statements of Income. The Company identifies the performance obligations included in its contracts with customers, determines the transaction price, allocates the transaction price to the performance obligations, as applicable, and recognizes revenue when the performance obligations are satisfied. Services provided over a period of time are generally transferred to customers evenly over the term of the contracts, and revenue is recognized evenly over the period the services are provided. Contract assets are included in accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets. Payment terms vary by services offered, and generally the time between the completion of performance obligations and receipt of payment is not significant. Additional information regarding contracts with customers can be found within Note 22: Revenue from Contracts with Customers.
Share-based Compensation	Share-Based Compensation Webster maintains stock compensation plans in which restricted stock, restricted stock units, non-qualified stock options, incentive stock options, or stock appreciation rights may be granted to employees and directors. Share awards are issued from available treasury shares. Stock compensation expense is recognized over the required service vesting period for each award based on the grant-date fair value, net of estimated forfeitures (which is adjusted for actual forfeitures when they occur), and is included as a component of compensation and benefits on the accompanying Consolidated Statements of Income. Share awards are generally subject to a 3-year vesting period, while certain conditions provide for a 1-year vesting period. For restricted stock and restricted stock unit awards, fair value is measured using the closing price of Webster's common stock at the grant date. For certain performance-based restricted stock awards, fair value is measured using the Monte Carlo valuation methodology, which provides for the 3-year performance period. These awards ultimately vest in a range from 0% to 150% of the target number of shares under the grant. Compensation expense is subject to adjustment based on management's assessment of Webster's return on equity performance relative to the target number of shares condition. Stock option awards use the Black-Scholes Option-Pricing Model to measure fair value at the grant date. Excess tax benefits or tax deficiencies results when tax return deductions differ from recognized compensation cost determined using the grant-date fair value approach for financial statement purposes. Dividends are paid on time-based shares upon grant and are non-forfeitable, while dividends are accrued on performance-based awards and paid with the vested shares when the performance target is met. Additional information regarding share-based compensation can be found within Note 20: Share-Based Plans.
Income Taxes	Income Taxes Income tax expense (benefit) is comprised of two components, current and deferred. The current component represents income taxes payable or refundable for the current period based on applicable tax laws, and the deferred component represents the tax effects of temporary differences between amounts recognized for financial accounting and tax purposes. DTAs and deferred tax liabilities (DTLs) reflect the tax effects of such differences that are anticipated to result in taxable or deductible amounts in the future when the temporary differences reverse. DTAs are recognized if it is more likely than not that they will be realized, and may be reduced by a valuation allowance if it is more likely than not that all or some portion will not be realized. Uncertain tax positions that meet a more likely than not recognition threshold are initially and subsequently measured as the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon settlement with a taxing authority based on knowledge of all relevant information. The determination of whether or not a tax position meets the more likely than not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management judgment. Webster recognizes interest and penalties on uncertain tax positions and interest on refundable income taxes as a component of income tax expense and other non-interest income, respectively, on the accompanying Consolidated Statements of Income. Additional information regarding income taxes can be found within Note 10: Income Taxes.
Earnings Per Common Share	Earnings per Common Share Earnings per common share is calculated under the two-class method. Basic earnings per common share is computed by dividing earnings applicable to common shareholders by the weighted-average number of common shares outstanding, excluding outstanding participating securities, during the pertinent period. Certain unvested restricted stock awards are considered participating securities as they have non-forfeitable rights to dividends. Diluted earnings per common share is computed using the weighted-average number of shares determined for the basic earnings per common share computation plus the dilutive effect of shares resulting from stock compensation and warrants for common stock using the treasury stock method. A reconciliation between the weighted-average common shares used in calculating basic earnings per common share and the weighted-average common shares used in calculating diluted earnings per common share can be found within Note 16: Earnings Per Common Share.
Comprehensive Income	Comprehensive Income (Loss) Comprehensive income (loss) includes all changes in shareholders’ equity during the period, except those resulting from transactions with shareholders. Comprehensive income consists of net income and the after-tax effect of the following items: changes in net unrealized gain (loss) on securities available-for-sale, changes in net unrealized gain (loss) on derivative instruments, and changes in net actuarial gain (loss) related to defined benefit pension and other postretirement benefit plans. Comprehensive income is reported on the accompanying Consolidated Statements of Shareholders' Equity and the accompanying Consolidated Statements of Comprehensive Income. Additional information regarding comprehensive income can be found within Note 14: Accumulated Other Comprehensive (Loss) Income, Net of Tax.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Derivatives are recognized at fair value and are included in accrued interest receivable and other assets and accrued expenses and other liabilities, as applicable, on the accompanying Consolidated Balance Sheets. The value of exchange-traded contracts is based on quoted market prices whereas non-exchange traded contracts are valued based on dealer quotes, pricing models, discounted cash flow methodologies, or similar techniques in which the determination of fair value may require management judgment or estimation. Cash flows from derivative financial instruments are included in net cash provided by operating activities on the accompanying Consolidated Statements of Cash Flows. Derivatives Designated in Hedge Relationships. The Company uses derivatives to hedge exposures or to modify interest rate characteristics for certain balance sheet accounts under its interest rate risk management strategy. The Company designates derivatives in qualifying hedge relationships as fair value or cash flow hedges for accounting purposes. Derivative financial instruments receive hedge accounting treatment if they are qualified and properly designated as a hedge, and remain highly effective in offsetting changes in the fair value or cash flows attributable to the risk being hedged, both at hedge inception and on an ongoing basis throughout the life of the hedge. Quarterly prospective and retrospective assessments are performed to ensure hedging relationships continue to be highly effective. If a hedge relationship is no longer highly effective, hedge accounting would be discontinued. The change in fair value on a derivative that is designated and qualifies as a fair value hedge, as well as the offsetting change in fair value on the hedged item attributable to the risk being hedged, is recognized in earnings. The gain or loss on a derivative that is designated and qualifies as a cash flow hedge is initially recorded as a component of accumulated other comprehensive loss, net of tax (AOCL), and either subsequently reclassified to interest income as hedged interest payments are received or to interest expense as hedged interest payments are made during the same period in which the hedged transaction affects earnings. Derivatives Not Designated in Hedge Relationships . The Company also enters into derivative transactions that are not designated in hedge relationships. Derivative financial instruments not designated in hedge relationships are recorded at fair value with changes in fair value recognized in other non-interest income on the accompanying Consolidated Statements of Income. Offsetting Assets and Liabilities . The Company presents derivative assets and derivative liabilities with the same counterparty and the related variation margin of cash collateral on a net basis on the accompanying Consolidated Balance Sheets. Cash collateral relating to initial margin is included in accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets. Securities collateral is not offset. The Company clears all dealer eligible contracts through the Chicago Mercantile Exchange (CME) and has elected to record non-cleared derivative positions subject to a legally enforceable master netting agreement on a net basis. Additional information regarding derivatives can be found within Note 17: Derivative Financial Instruments.
Fair Value Measurements	Fair Value Measurements The Company measures many of its assets and liabilities on a fair value basis in accordance with Accounting Standards Codification (ASC) Topic 820, Fair Value Measurement. 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. Fair value is used to measure certain assets and liabilities on a recurring basis when fair value is the primary basis of accounting, and on a non-recurring basis when evaluating assets or liabilities for impairment. Additional information regarding the Company's policies and methodology used to measure fair value can be found within Note 18: Fair Value Measurements.
Employee Retirement Benefit Plan	Employee Retirement Benefit Plans Webster Bank sponsors a defined contribution postretirement benefit plan offering traditional 401(k) and Roth 401(k) options to employees who have attained age 21 beginning 90 days after hire. Expenses to maintain the plan, as well as employer matching contributions, are charged to compensation and benefits on the accompanying Consolidated Statements of Income. Webster Bank had offered a qualified noncontributory defined benefit pension plan and a non-qualified supplemental executive retirement plan (SERP) to eligible employees and key executives who met certain age and service requirements. Both the pension plan and the SERP were frozen effective December 31, 2007. Pension contributions are funded in accordance with the requirements of the Employee Retirement Income Security Act. Webster Bank also provides for other post-employment medical and life insurance benefits (OPEB) to certain retired employees. Net periodic benefit costs, which are based upon actuarial computations of current and future benefits for eligible employees, are charged to other non-interest expense on the accompanying Consolidated Statements of Income. The funded status of the plans' is recorded as an asset when over-funded or a liability when under-funded. Additional information regarding the defined benefit pension and postretirement benefit plans can be found within Note 19: Retirement Benefit Plans.
Recently Adopted and Issued Accounting Standards Updates	Recently Adopted Accounting Standards Updates (ASUs) Effective January 1, 2021, the following new accounting guidance was adopted by the Company: ASU No. 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The Accounting Standards Update (the Update) provides simplification to the accounting for income taxes related to a variety of topics and makes minor codification improvements. Changes include a requirement that the effects of an enacted change in tax law be reflected in the computation of the annual effective tax rate in the first interim period that includes the enactment date of the new legislation and clarification on presentation of non-income based taxes. The Company adopted the Update on January 1, 2021 on a prospective basis. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements. ASU No. 2021-01, Reference Rate Reform (Topic 848) - Scope. The Update clarifies that certain optional expedients and exceptions provided for in ASU No. 2020-04 for applying GAAP to contract modifications and hedging relationships apply to derivatives that are affected by the discounting transition. The amendments are elective and apply to all entities that have derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The Update was effective upon issuance for application on either a retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 22, 2020, or on a prospective basis beginning on January 7, 2021. The Company adopted the Update on a prospective basis. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements. Accounting Standards Issued but not yet Adopted The Company has adopted all applicable ASUs issued by the FASB as of December 31, 2021.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Property, Plant and Equipment	Property and equipment is carried at cost, less accumulated depreciation and amortization. Depreciation and amortization is computed on a straight-line basis over the estimated useful lives of the assets, as illustrated in the following table. If shorter, leasehold improvements are amortized over the terms of the respective leases. Minimum Maximum Building and Improvements 5 - 40 years Leasehold improvements 5 - 20 years Fixtures and equipment 5 - 10 years Data processing and software 3 - 7 years The following table summarizes the components of premises and equipment: At December 31, (In thousands) 2021 2020 Land $ 9,436 $ 9,436 Buildings and improvements 67,501 70,195 Leasehold improvements 65,606 71,332 Fixtures and equipment 64,890 73,730 Data processing and software 105,516 270,780 Property and equipment 312,949 495,473 Less: Accumulated depreciation and amortization (228,318) (396,211) Property and equipment, net 84,631 99,262 ROU lease assets, net 119,926 127,481 Premises and equipment, net $ 204,557 $ 226,743

Business Developments (Tables)

Business Developments (Tables)	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve by Type of Cost	Costs incurred related to the execution of these strategic initiatives consisted of the following for the years ended December 31: Years ended December 31, (In thousands) 2021 2020 Severance and other benefits $ (1,562) $ 17,860 Professional fees and other related charges 8,569 10,788 ROU lease asset impairment 1,198 11,954 Other (1) (1,037) 2,055 Total strategic initiatives costs $ 7,168 $ 42,657 (1) Other includes accelerated depreciation and operating lease costs for all periods presented, gain on sale of banking centers and early lease terminations in 2021, and write-downs of property and equipment in 2020. The following table summarizes the changes in accrued expenses and other liabilities associated with these strategic initiatives: Year ended December 31, 2021 (In thousands) Severance and Professional fees and other Total Balance at December 31, 2019 $ — $ — $ — Additions charged to expense 17,860 10,788 28,648 Cash payments (185) (8,668) (8,853) Balance at December 31, 2020 $ 17,675 $ 2,120 $ 19,795 Additions charged to expense 2,340 8,569 10,909 Adjustments (1) (3,902) — (3,902) Cash payments (10,994) (8,962) (19,956) Balance at December 31, 2021 $ 5,119 $ 1,727 $ 6,846 (1) Changes in employee retention assumptions during the third quarter of 2021 resulted in a release of the Company's previously recorded severance accrual.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Summary of Investment Securities	Available-for-Sale The following table summarizes the amortized cost and fair value of available-for-sale debt securities by major type: At December 31, 2021 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value (2) 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 At December 31, 2020 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value (2) Agency CMO $ 148,711 $ 6,000 $ (98) $ 154,613 Agency MBS 1,389,100 68,598 (289) 1,457,409 Agency CMBS 1,092,430 26,317 (1,514) 1,117,233 CMBS 512,759 1,082 (5,823) 508,018 CLO 76,693 — (310) 76,383 Corporate debt 14,557 — (1,437) 13,120 Available-for-sale debt securities $ 3,234,250 $ 101,997 $ (9,471) $ 3,326,776 (1) Accrued interest receivable of $7.5 million at both December 31, 2021 and 2020 is excluded from amortized cost and is reported within accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets.
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value	Unrealized Losses The following table summarizes 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 and for which an ACL has not been recorded: At December 31, 2021 Less Than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized # 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 $ 2,272,641 $ (17,086) $ 558,515 $ (17,256) 162 $ 2,831,156 $ (34,342) At December 31, 2020 Less Than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized # of Fair Unrealized Agency CMO $ 13,137 $ (49) $ 5,944 $ (49) 5 $ 19,081 $ (98) Agency MBS 33,742 (219) 4,561 (70) 30 38,303 (289) Agency CMBS 376,330 (1,514) — — 8 376,330 (1,514) CMBS 409,591 (5,486) 23,167 (337) 38 432,758 (5,823) CLO 57,728 (265) 18,655 (45) 4 76,383 (310) Corporate debt 4,100 (166) 9,020 (1,271) 3 13,120 (1,437) Available-for-sale debt securities $ 894,628 $ (7,699) $ 61,347 $ (1,772) 88 $ 955,975 $ (9,471)
Debt Securities, Held-to-maturity	The following table summarizes the amortized cost, fair value, and ACL of held-to-maturity debt securities by major type: At December 31, 2021 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value Allowance for Credit Losses 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 At December 31, 2020 (In thousands) Amortized Cost (1) Gross Unrealized Gross Unrealized Fair Value Allowance for Credit Losses Net Carrying Value Agency CMO $ 91,622 $ 1,785 $ (241) $ 93,166 $ — $ 91,622 Agency MBS 2,419,751 137,863 (84) 2,557,530 — 2,419,751 Agency CMBS 2,101,227 60,484 (2,213) 2,159,498 — 2,101,227 Municipal bonds and notes 739,507 60,371 (3) 799,875 299 739,208 CMBS 216,081 9,214 — 225,295 — 216,081 Held-to-maturity debt securities $ 5,568,188 $ 269,717 $ (2,541) $ 5,835,364 $ 299 $ 5,567,889 (1) Accrued interest receivable of $21.2 million and $22.1 million at December 31, 2021 and December 31, 2020, respectively, is excluded from amortized cost and is reported within accrued interest receivable and other assets on the accompanying Consolidated Balance Sheets.
Debt Securities, Held-to-maturity, Allowance for Credit Loss	The following table summarizes the activity in the ACL on held-to-maturity debt securities: Years ended December 31, (In thousands) 2021 2020 Balance, beginning of period (1) $ 299 $ — Adoption of CECL — 397 (Benefit) for credit losses (85) (98) Balance, end of period $ 214 $ 299 (1) The Company adopted CECL on January 1, 2020. The prior period beginning balance did not have an allowance recorded under the applicable GAAP for that period.
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 December 31, 2021 (In thousands) Amortized Fair Value Maturing within 1 year $ — $ — After 1 year through 5 years 401,668 400,037 After 5 years through 10 years 113,288 113,260 After 10 years 3,712,741 3,721,557 Available-for-sale debt securities $ 4,227,697 $ 4,234,854 The table summarizes the amortized cost and fair value of held-to-maturity debt securities by contractual maturity: At December 31, 2021 (In thousands) Amortized Fair Value Maturing within 1 year $ 180 $ 180 After 1 year through 5 years 7,425 7,712 After 5 years through 10 years 292,727 304,190 After 10 years 5,898,007 5,968,854 Held-to-maturity debt securities $ 6,198,339 $ 6,280,936
Debt Securities, Held-to-maturity, Credit Quality Indicator	The following table summarizes the amortized cost basis of held-to-maturity debt securities based on their lowest credit rating made publicly available: At December 31, 2021 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMOs $ — $ 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 $ 377,374 $ 5,442,277 $ 227,106 $ 104,232 $ 35,878 $ 8,260 $ — $ 95 $ 3,117 At December 31, 2020 Investment Grade (In thousands) Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa2 Not Rated Agency CMOs $ — $ 91,622 $ — $ — $ — $ — $ — $ — $ — Agency MBS — 2,419,751 — — — — — — — Agency CMBS — 2,101,227 — — — — — — — Municipal bonds and notes 209,376 165,056 201,081 115,619 33,264 8,475 2,066 190 4,380 CMBS 216,081 — — — — — — — — Held-to-maturity $ 425,457 $ 4,777,656 $ 201,081 $ 115,619 $ 33,264 $ 8,475 $ 2,066 $ 190 $ 4,380

Loans and Leases (Tables)

Loans and Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Abstract]
Loans and Leases by Portfolio Segment and Class	The following table summarizes loans and leases by portfolio segment and class: At December 31, (In thousands) 2021 2020 Commercial non-mortgage $ 6,882,480 $ 7,085,076 Asset-based 1,067,248 890,598 Commercial real estate 6,603,180 6,322,637 Equipment financing 627,058 602,224 Commercial portfolio 15,179,966 14,900,535 Residential 5,412,905 4,782,016 Home equity 1,593,559 1,802,865 Other consumer 85,299 155,799 Consumer portfolio 7,091,763 6,740,680 Loans and leases $ 22,271,729 $ 21,641,215
Past Due Financing Receivables	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 December 31, 2021 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total 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 6,596,690 6,603,180 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 At December 31, 2020 (In thousands) 30-59 Days 60-89 Days 90 or More Days Past Due Non-accrual Total Current Total Loans Commercial non-mortgage $ 612 $ 903 $ 445 $ 64,073 $ 66,033 $ 7,019,043 $ 7,085,076 Asset-based 1,174 — — 2,594 3,768 886,830 890,598 Commercial real estate 2,400 619 — 21,231 24,250 6,298,387 6,322,637 Equipment financing 5,107 2,308 — 7,299 14,714 587,510 602,224 Commercial portfolio 9,293 3,830 445 95,197 108,765 14,791,770 14,900,535 Residential 4,334 6,330 — 41,081 51,745 4,730,271 4,782,016 Home equity 5,500 1,771 — 31,030 38,301 1,764,564 1,802,865 Other consumer 878 601 — 652 2,131 153,668 155,799 Consumer portfolio 10,712 8,702 — 72,763 92,177 6,648,503 6,740,680 Total $ 20,005 $ 12,532 $ 445 $ 167,960 $ 200,942 $ 21,440,273 $ 21,641,215 The following table provides additional information on non-accrual loans and leases: At December 31, 2021 2020 (In thousands) Non-accrual Non-accrual With No Allowance Non-accrual Non-accrual With No Allowance Commercial non-mortgage $ 59,607 $ 4,802 $ 64,073 $ 16,985 Asset-based 2,086 2,086 2,594 — Commercial real estate 5,046 4,310 21,231 15,529 Equipment financing 3,728 — 7,299 2,983 Commercial portfolio 70,467 11,198 95,197 35,497 Residential 15,747 10,584 41,081 29,843 Home equity 23,489 18,920 31,030 24,091 Other consumer 224 2 652 2 Consumer portfolio 39,460 29,506 72,763 53,936 Total $ 109,927 $ 40,704 $ 167,960 $ 89,433
Activity In Allowance For Losses	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 Years ended December 31, 2021 2020 2019 (In thousands) Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total Commercial Portfolio Consumer Portfolio Total ACL on loans and leases: Beginning balance $ 312,244 $ 47,187 $ 359,431 $ 161,669 $ 47,427 $ 209,096 $ 164,073 $ 48,280 $ 212,353 Adoption of CECL — — — 34,024 23,544 57,568 — — — (Benefit) provision (48,651) (5,764) (54,415) 156,336 (18,488) 137,848 29,174 8,626 37,800 Charge-offs (9,437) (9,217) (18,654) (42,925) (12,408) (55,333) (33,327) (19,153) (52,480) Recoveries 3,721 11,104 14,825 3,140 7,112 10,252 1,749 9,674 11,423 Ending balance $ 257,877 $ 43,310 $ 301,187 $ 312,244 $ 47,187 $ 359,431 $ 161,669 $ 47,427 $ 209,096 Individually assessed ACL 16,965 4,108 21,073 11,687 4,450 16,137 9,428 4,821 14,249 Collectively assessed ACL $ 240,912 $ 39,202 $ 280,114 $ 300,557 $ 42,737 $ 343,294 $ 152,241 $ 42,606 $ 194,847
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 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 1,375,306 869,144 1,331,236 916,868 401,718 1,339,942 55,610 6,289,824 Special mention 95 3,084 — 119,676 51,536 79,096 — 253,487 Substandard — 482 227 7,306 13,874 37,980 — 59,869 Commercial real estate 1,375,401 872,710 1,331,463 1,043,850 467,128 1,457,018 55,610 6,603,180 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 Total 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 At December 31, 2020 (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total Commercial non-mortgage: Pass $ 2,771,373 $ 1,052,080 $ 907,110 $ 481,321 $ 231,280 $ 218,001 $ 936,592 $ 6,597,757 Special mention 32,535 33,969 62,034 435 8,357 13,757 38,496 189,583 Substandard 54,716 51,798 66,324 36,159 15,535 23,957 49,084 297,573 Doubtful — — — 163 — — — 163 Commercial non-mortgage 2,858,624 1,137,847 1,035,468 518,078 255,172 255,715 1,024,172 7,085,076 Asset-based: Pass 26,344 15,960 23,123 11,333 10,963 16,484 741,336 845,543 Special mention — — 775 — — — 41,687 42,462 Substandard — 2,504 — — — — 89 2,593 Asset-based 26,344 18,464 23,898 11,333 10,963 16,484 783,112 890,598 Commercial real estate: Pass 965,582 1,461,201 1,242,322 527,931 554,630 1,165,331 28,113 5,945,110 Special mention 27 10,385 70,704 37,539 35,617 69,832 — 224,104 Substandard 817 1,132 21,923 73,621 2,962 52,968 — 153,423 Commercial real estate 966,426 1,472,718 1,334,949 639,091 593,209 1,288,131 28,113 6,322,637 Equipment financing: Pass 249,370 135,263 68,092 26,433 43,469 22,879 — 545,506 Special mention 7,934 11,043 6,981 1,220 1,577 788 — 29,543 Substandard 7,483 6,169 5,749 2,460 4,743 571 — 27,175 Equipment financing 264,787 152,475 80,822 30,113 49,789 24,238 — 602,224 Total commercial portfolio $ 4,116,181 $ 2,781,504 $ 2,475,137 $ 1,198,615 $ 909,133 $ 1,584,568 $ 1,835,397 $ 14,900,535 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 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 Total consumer portfolio 2,198,697 1,077,624 502,707 144,883 274,746 1,669,802 1,223,304 7,091,763 At December 31, 2020 (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total Residential: 800+ $ 360,336 $ 283,755 $ 61,048 $ 178,849 $ 268,044 $ 805,537 $ — $ 1,957,569 740-799 654,973 288,173 58,249 133,416 176,286 492,720 — 1,803,817 670-739 199,329 118,620 39,125 75,375 76,666 248,268 — 757,383 580-669 17,151 19,389 8,884 11,843 12,225 96,333 — 165,825 579 and below — 36,498 673 3,278 3,179 53,794 — 97,422 Residential 1,231,789 746,435 167,979 402,761 536,400 1,696,652 — 4,782,016 Home equity: 800+ 30,604 16,567 25,205 14,439 17,192 59,956 542,600 706,563 740-799 34,797 13,565 19,715 11,073 12,839 43,802 434,271 570,062 670-739 13,753 8,855 10,761 10,206 7,318 44,025 275,691 370,609 580-669 1,708 2,172 2,660 2,234 2,316 16,680 86,126 113,896 579 and below 129 919 880 1,070 1,073 7,163 30,501 41,735 Home equity 80,991 42,078 59,221 39,022 40,738 171,626 1,369,189 1,802,865 Other consumer: 800+ 2,827 5,725 2,610 658 115 190 7,171 19,296 740-799 12,317 21,036 8,925 1,493 457 263 5,119 49,610 670-739 14,761 31,952 11,843 2,284 665 228 8,403 70,136 580-669 2,344 5,419 2,360 793 194 124 1,570 12,804 579 and below 608 982 500 183 37 215 1,428 3,953 Other consumer 32,857 65,114 26,238 5,411 1,468 1,020 23,691 155,799 Total consumer portfolio 1,345,637 853,627 253,438 447,194 578,606 1,869,298 1,392,880 6,740,680
Troubled Debt Restructurings on Financing Receivables	Troubled Debt Restructurings The following table summarizes information related to TDRs: At December 31, (Dollars in thousands) 2021 2020 Accrual status $ 110,625 $ 140,089 Non-accrual status 52,719 95,338 Total TDRs $ 163,344 $ 235,427 Additional funds committed to borrowers in TDR status $ 5,975 $ 12,895 Specific reserves for TDRs included in the ACL on loans and leases: Commercial portfolio $ 9,017 $ 8,657 Consumer portfolio 3,745 4,071 The respective portions of commercial and consumer TDRs deemed to be uncollectible and charged-off were $3.0 million and $0.4 million during the year ended December 31, 2021, $17.6 million and $0.8 million during the year ended December 31, 2020, and $20.3 million and $1.5 million during the year ended December 31, 2019. The following table summarizes loans and leases modified as TDRs by class and modification type: Years ended December 31, 2021 2020 2019 Number of Recorded Investment (1) Number of Recorded Investment (1) Number of Recorded Investment (1) (Dollars in thousands) Commercial non-mortgage Extended maturity 8 $ 605 11 $ 1,070 15 $ 2,413 Adjusted interest rate — — 1 96 2 112 Maturity/rate combined 9 352 7 607 11 673 Other (2) 12 14,160 24 40,128 28 65,186 Commercial real estate Extended maturity 1 183 1 72 3 8,356 Maturity/rate combined — — 2 377 — — Other (2) 1 1,582 3 306 3 4,816 Residential Extended maturity 1 99 3 485 7 1,327 Maturity/rate combined 2 401 10 1,133 15 2,241 Other (2) 3 280 26 4,215 8 1,001 Home equity Extended maturity 85 1,809 3 188 6 599 Maturity/rate combined 6 1,025 5 334 4 140 Other (2) 22 1,481 96 6,680 34 1,907 Total TDRs 150 $ 21,977 192 $ 55,691 136 $ 88,771 (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 of Financial Assets (

Transfers of Financial Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Transfers and Servicing [Abstract]
Schedule of Loan Sale Activity [Table Text Block]	The following table provides information related to mortgage banking activities: Years ended December 31, (In thousands) 2021 2020 2019 Proceeds from sale $ 247,634 $ 486,341 $ 216,239 Loans sold with servicing rights retained 237,834 464,736 199,114 Net gain on sale $ 5,192 $ 15,305 $ 4,031 Ancillary fees 1,440 3,230 1,614 Fair value option adjustment (413) (240) 470
Servicing Asset at Amortized Cost	The following table presents the change in the carrying amount for mortgage servicing assets: Years ended December 31, (In thousands) 2021 2020 2019 Beginning balance $ 13,422 $ 17,484 $ 21,215 Additions 2,053 4,373 3,587 Amortization (5,593) (6,562) (7,318) Adjustment to valuation allowance (645) (1,873) — Ending balance $ 9,237 $ 13,422 $ 17,484
Reserve For Loan Repurchases	The following table summarizes the activity in the reserve for loan repurchases: Years ended December 31, (In thousands) 2021 2020 2019 Beginning balance $ 747 $ 508 $ 674 Provision 73 141 1,865 Repurchased loans and settlements (charged-off) recovered, net (72) 98 (2,031) Ending balance $ 748 $ 747 $ 508 (1) The increased provision and corresponding charge-off in 2019 was related to a discrete legal settlement in connection with previously sold loans.

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property and equipment is carried at cost, less accumulated depreciation and amortization. Depreciation and amortization is computed on a straight-line basis over the estimated useful lives of the assets, as illustrated in the following table. If shorter, leasehold improvements are amortized over the terms of the respective leases. Minimum Maximum Building and Improvements 5 - 40 years Leasehold improvements 5 - 20 years Fixtures and equipment 5 - 10 years Data processing and software 3 - 7 years The following table summarizes the components of premises and equipment: At December 31, (In thousands) 2021 2020 Land $ 9,436 $ 9,436 Buildings and improvements 67,501 70,195 Leasehold improvements 65,606 71,332 Fixtures and equipment 64,890 73,730 Data processing and software 105,516 270,780 Property and equipment 312,949 495,473 Less: Accumulated depreciation and amortization (228,318) (396,211) Property and equipment, net 84,631 99,262 ROU lease assets, net 119,926 127,481 Premises and equipment, net $ 204,557 $ 226,743
Disclosure of Long Lived Assets Held-for-sale	The following table summarizes activity in assets held for disposition: Years ended December 31, (In thousands) 2021 2020 Beginning balance $ 2,654 $ — Transfers (to) from property and equipment (38) 2,654 Sales (2,126) — Ending balance $ 490 $ 2,654

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Summary of Net Investments	The following table summarizes the components of Webster's net investment in its direct financing leases: At December 31, (In thousands) 2021 2020 Lease receivables $ 196,632 $ 207,508 Unguaranteed residual values 19,748 28,609 Total net investment $ 216,380 $ 236,117
Summary of Net Investment Maturity	The undiscounted scheduled maturities reconciled to the total net investment are as follows: (In thousands) At December 31, 2021 2022 $ 68,008 2023 59,554 2024 39,325 2025 29,534 2026 21,687 Thereafter 16,636 Total lease payments receivable 234,744 Present value adjustment (18,364) Total net investment $ 216,380
Schedule of Components of Leveraged Lease Investments [Table Text Block]	The following table summarizes Webster's ROU lease assets and operating lease liabilities: At December 31, (In thousands) Consolidated Balance Sheet Line Item 2021 2020 ROU lease assets Premises and equipment, net $ 119,926 $ 127,481 Operating lease liabilities Operating lease liabilities 144,804 158,280
Lease, Cost	The following table summarizes the components of operating lease expense and other relevant information: At or for the Years ended December 31, (In thousands) 2021 2020 2019 Lease Cost: Operating lease costs $ 26,076 $ 30,339 $ 29,908 Variable lease costs 4,860 5,577 4,889 Sublease income (554) (557) (577) Total operating lease expense $ 30,382 $ 35,359 $ 34,220 Other Information: Cash paid for amounts included in the measurement of operating lease liabilities $ 30,487 $ 31,212 $ 31,223 ROU lease assets obtained in exchange for operating lease liabilities 15,226 9,211 22,948 Weighted-average remaining lease term (years) 7.50 8.04 8.39 Weighted-average discount rate 3.04 % 3.19 % 3.31 %
Lessee, Operating Lease, Liability, Maturity	The undiscounted scheduled maturities reconciled to total operating lease liabilities are as follows: (In thousands) At December 31, 2021 2022 $ 25,895 2023 26,539 2024 23,767 2025 21,792 2026 18,656 Thereafter 48,009 Total operating lease payments 164,658 Present value adjustment (19,854) Total operating lease liabilities $ 144,804

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	Other intangible assets by reportable segment consisted of the following: At December 31, 2021 2020 (In thousands) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying HSA Bank - Core deposits $ 26,625 $ 18,516 $ 8,109 $ 26,625 $ 15,618 $ 11,007 HSA Bank - Customer relationships 21,000 11,240 9,760 21,000 9,624 11,376 Total other intangible assets $ 47,625 $ 29,756 $ 17,869 $ 47,625 $ 25,242 $ 22,383
Schedule Of Expected Amortization Expense, Next Four Years	The remaining estimated aggregate future amortization expense for other intangible assets is as follows at December 31, 2021: (In thousands) 2022 $ 4,410 2023 4,315 2024 2,084 2025 2,084 2026 2,084 Thereafter 2,892

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income tax expense reflects the following expense (benefit) components: Years ended December 31, (In thousands) 2021 2020 2019 Current: Federal $ 109,621 $ 73,172 $ 84,447 State and local 20,374 17,417 18,595 Total current 129,995 90,589 103,042 Deferred: Federal (9,844) (23,799) 811 State and local 4,846 (7,437) 116 Total deferred (4,998) (31,236) 927 Total federal 99,777 49,373 85,258 Total state and local 25,220 9,980 18,711 Income tax expense $ 124,997 $ 59,353 $ 103,969
Schedule of Effective Income Tax Rate Reconciliation	The following table reflects a reconciliation of reported income tax expense to the amount that would result from applying the federal statutory rate of 21.0%: Years ended December 31, 2021 2020 2019 (Dollars in thousands) Amount Percent Amount Percent Amount Percent Income tax expense at federal statutory rate $ 112,111 21.0 % $ 58,795 21.0 % $ 102,205 21.0 % Reconciliation to reported income tax expense: SALT expense, net of federal 19,924 3.7 7,884 2.8 14,782 3.0 Tax-exempt interest income, net (6,814) (1.3) (7,181) (2.6) (6,752) (1.4) Increase in cash surrender value of life insurance (3,030) (0.6) (3,058) (1.1) (3,069) (0.6) Tax deficiencies (excess tax benefits), net (1,479) (0.3) 484 0.2 (2,251) (0.4) Non-deductible FDIC Deposit insurance premiums 2,064 0.4 2,172 0.8 1,904 0.4 Non-deductible merger-related expenses 3,451 0.7 — — — — Other, net (1,230) (0.2) 257 0.1 (2,850) (0.6) Income tax expense and effective tax rate $ 124,997 23.4 % $ 59,353 21.2 % $ 103,969 21.4 %
Schedule of Deferred Tax Assets and Liabilities	The following table reflects the significant components of the DTAs, net: At December 31, (In thousands) 2021 2020 Deferred tax assets: Allowance for loan and lease losses $ 78,905 $ 93,791 Net operating loss and credit carry forwards 64,366 66,840 Compensation and employee benefit plans 22,840 27,643 Lease liabilities under operating leases 38,130 41,679 Other 12,790 8,750 Gross deferred tax assets 217,031 238,703 Valuation allowance 37,374 37,374 Total deferred tax assets, net of valuation allowance $ 179,657 $ 201,329 Deferred tax liabilities: Net unrealized gain on securities available for sale $ 1,885 $ 24,364 Net unrealized gain on derivatives 2,584 7,616 ROU assets under operating leases 31,580 33,569 Equipment financing leases 21,193 38,511 Premises and equipment 879 6,735 Goodwill and other intangible assets 5,690 5,954 Other 6,441 3,294 Gross deferred tax liabilities 70,252 120,043 Deferred tax assets, net $ 109,405 $ 81,286
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible	The following table reflects a reconciliation of the beginning and ending balances of unrecognized tax benefits (UTBs): Years ended December 31, (In thousands) 2021 2020 2019 Beginning balance $ 4,252 $ 4,813 $ 2,856 Additions as a result of tax positions taken during the current year 294 87 1,106 Additions as a result of tax positions taken during prior years 434 572 1,744 Reductions as a result of tax positions taken during prior years (186) (694) (238) Reductions relating to settlements with taxing authorities (267) (130) (18) Reductions as a result of lapse of statute of limitation periods (278) (396) (637) Ending balance $ 4,249 $ 4,252 $ 4,813

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Deposit Liabilities [Abstract]
Deposit Liabilities, Type [Table Text Block]	The following table summarizes deposits by type: At December 31, (In thousands) 2021 2020 Non-interest-bearing: Demand $ 7,060,488 $ 6,155,592 Interest-bearing: Health savings accounts 7,397,582 7,120,017 Checking 4,182,497 3,652,763 Money market 3,718,953 2,940,215 Savings 5,689,739 4,979,031 Time deposits 1,797,770 2,487,818 Total interest-bearing 22,786,541 21,179,844 Total deposits $ 29,847,029 $ 27,335,436 Time deposits and interest-bearing checking obtained through brokers $ 120,392 $ 720,440 Aggregate amount of time deposit accounts that exceeded the FDIC limit 256,522 504,543 Demand deposit overdrafts reclassified as loan balances 1,577 2,007
Time Deposit Maturities [Table Text Block]	The scheduled maturities of time deposits are as follows: (In thousands) At December 31, 2021 2022 $ 1,566,257 2023 115,321 2024 46,432 2025 49,849 2026 19,911 Total time deposits $ 1,797,770

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Repurchase Agreements	The following table summarizes securities sold under agreements to repurchase and other borrowings: At December 31, 2021 2020 (Dollars in thousands) Total Outstanding Rate Total Outstanding Rate Securities sold under agreements to repurchase (1) : Original maturity of one year or less $ 474,896 0.11 % $ 269,330 0.13 % Original maturity of greater than one year, non-callable 200,000 1.32 200,000 0.84 Total securities sold under agreements to repurchase 674,896 0.47 469,330 0.43 Federal funds purchased — — 526,025 0.08 Securities sold under agreements to repurchase and other borrowings $ 674,896 0.47 % $ 995,355 0.25 % (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. Securities sold under agreements to repurchase are used as a source of borrowed funds and are collateralized by Agency MBS. Webster'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 term and overnight federal funds to satisfy its short-term liquidity needs.
Federal Home Loan Bank, Advances	The following table summarizes information for FHLB advances: At December 31, 2021 2020 (Dollars in thousands) Total Weighted-Average Contractual Coupon Rate Total Weighted-Average Contractual Coupon Rate Maturing within 1 year $ 90 — % $ 25,000 0.38 % After 1 year but within 2 years 202 2.95 110 — After 2 years but within 3 years — — 215 2.95 After 3 years but within 4 years — — 50,000 1.59 After 4 years but within 5 years — — 50,000 1.42 After 5 years 10,705 2.03 7,839 2.66 FHLB advances $ 10,997 2.03 % $ 133,164 1.36 % Aggregate carrying value of assets pledged as collateral $ 7,556,034 $ 7,387,054 Remaining borrowing capacity at FHLB 5,087,294 4,689,642 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 December 31, 2021 and 2020.
Schedule of Long-Term Debt	The following table summarizes long-term debt: At December 31, (Dollars in thousands) 2021 2020 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) 338,811 344,164 Junior subordinated debt Webster Statutory Trust I floating-rate notes due September 17, 2033 (2) 77,320 77,320 Total senior and subordinated debt 566,131 571,484 Discount on senior fixed-rate notes (974) (1,193) Debt issuance cost on senior fixed-rate notes (2,226) (2,628) Long-term debt $ 562,931 $ 567,663 (1) Webster de-designated its fair value hedging relationship on these senior notes in 2020. A basis adjustment of $38.8 million and $44.2 million at December 31, 2021 and 2020, respectively, is included in the carrying value and is being amortized over the remaining life of the senior notes.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of Stock by Class	The following table summarizes the changes in Webster's preferred shares, common shares, and treasury shares for the year ended December 31, 2021: Preferred Stock Series F Common Stock Issued Treasury Stock Held Common Stock Outstanding Balance at January 1, 2021 6,000 93,686,311 3,487,389 90,198,922 Restricted share activity — — (154,281) 154,281 Stock options exercised — — (230,418) 230,418 Balance at December 31, 2021 6,000 93,686,311 3,102,690 90,583,621

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss, Net of Tax (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of Other Comprehensive Income (Loss)	The following table summarizes the changes in each component of accumulated other comprehensive (loss) income, net of tax: (In thousands) Securities Available Derivative Instruments Defined Benefit Pension and Other Postretirement Benefit Plans Total Balance at December 31, 2018 $ (71,374) $ (9,313) $ (49,965) $ (130,652) Other comprehensive income (loss) before reclassifications 88,647 (4,945) 1,622 85,324 Amounts reclassified from accumulated other comprehensive (loss) (22) 5,074 4,204 9,256 Other comprehensive income, net of tax 88,625 129 5,826 94,580 Balance at December 31, 2019 17,251 (9,184) (44,139) (36,072) Other comprehensive income (loss) before reclassifications 50,179 20,667 (3,887) 66,959 Amounts reclassified from accumulated other comprehensive (6) 8,435 2,940 11,369 Other comprehensive income (loss), net of tax 50,173 29,102 (947) 78,328 Balance at December 31, 2020 67,424 19,918 (45,086) 42,256 Other comprehensive (loss) income before reclassifications (62,888) (17,109) 8,876 (71,121) Amounts reclassified from accumulated other comprehensive — 3,261 3,024 6,285 Other comprehensive (loss) income, net of tax (62,888) (13,848) 11,900 (64,836) Balance at December 31, 2021 $ 4,536 $ 6,070 $ (33,186) $ (22,580)
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table further summarizes the amounts reclassified from accumulated other comprehensive (loss) income: Years ended December 31, Accumulated Other Comprehensive 2021 2020 2019 Associated Line Item in the Consolidated Statement Of Income (In thousands) Securities available-for-sale: Net unrealized holding gains $ — $ 8 $ 29 Gain on sale of investment securities, net Tax (expense) — (2) (7) Income tax expense Net of tax $ — $ 6 $ 22 Derivative instruments: Hedge terminations $ (4,109) $ (7,884) $ (5,509) Interest expense Premium amortization (306) (3,536) (1,323) Interest income Tax benefit 1,154 2,985 1,758 Income tax expense Net of tax $ (3,261) $ (8,435) $ (5,074) Defined benefit pension and other postretirement benefit plans: Actuarial net loss amortization $ (4,102) $ (3,976) $ (5,706) Other non-interest expense Tax benefit 1,078 1,036 1,502 Income tax expense Net of tax $ (3,024) $ (2,940) $ (4,204) The following tables summarize each component of other comprehensive (loss) income and the related tax effects: Year ended December 31, 2021 (In thousands) Amount Tax Benefit (Expense) Amount Securities available-for-sale: Net unrealized holding (losses) arising during the year $ (85,368) $ 22,480 $ (62,888) Total securities available-for-sale (85,368) 22,480 (62,888) Derivative instruments: Net unrealized (losses) arising during the year (23,216) 6,107 (17,109) Reclassification adjustment for net realized losses included in net income 4,415 (1,154) 3,261 Total derivative instruments (18,801) 4,953 (13,848) Defined benefit pension and other postretirement benefit plans: Net actuarial gain arising during the year 12,052 (3,176) 8,876 Reclassification adjustment for net actuarial loss amortization included in net income 4,102 (1,078) 3,024 Total defined benefit pension and postretirement benefit plans 16,154 (4,254) 11,900 Other comprehensive (loss), net of tax $ (88,015) $ 23,179 $ (64,836) Year ended December 31, 2020 (In thousands) Amount Tax Benefit (Expense) Amount Securities available-for-sale: Net unrealized holding gains arising during the year $ 68,116 $ (17,937) $ 50,179 Reclassification adjustment for net realized gains included in net income (8) 2 (6) Total securities available-for-sale 68,108 (17,935) 50,173 Derivative instruments: Net unrealized gains arising during the year 27,683 (7,016) 20,667 Reclassification adjustment for net realized losses included in net income 11,420 (2,985) 8,435 Total derivative instruments 39,103 (10,001) 29,102 Defined benefit pension and other postretirement benefit plans: Net actuarial loss arising during the year (5,262) 1,375 (3,887) Reclassification adjustment for net actuarial loss amortization included in net income 3,976 (1,036) 2,940 Total defined benefit pension and postretirement benefit plans (1,286) 339 (947) Other comprehensive income, net of tax $ 105,925 $ (27,597) $ 78,328 Year ended December 31, 2019 (In thousands) Amount Tax Benefit (Expense) Amount Securities available-for-sale: Net unrealized holding gains arising during the year $ 120,333 $ (31,686) $ 88,647 Reclassification adjustment for net realized gains included in net income (29) 7 (22) Total securities available-for-sale 120,304 (31,679) 88,625 Derivative instruments: Net unrealized (losses) arising during the year (6,672) 1,727 (4,945) Reclassification adjustment for net realized losses included in net income 6,832 (1,758) 5,074 Total derivative instruments 160 (31) 129 Defined benefit pension and other postretirement benefit plans: Net actuarial gain arising during the year 2,202 (580) 1,622 Reclassification adjustment for net actuarial loss amortization included in net income 5,706 (1,502) 4,204 Total defined benefit pension and postretirement benefit plans 7,908 (2,082) 5,826 Other comprehensive income, net of tax $ 128,372 $ (33,792) $ 94,580

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2021
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Information On The Capital Ratios	The following table provides information on the capital ratios for Webster Financial Corporation and Webster Bank: 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 At December 31, 2020 Actual (1) Minimum Requirement Well Capitalized (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Webster Financial Corporation CET1 risk-based capital $ 2,543,131 11.35 % $ 1,008,512 4.5 % $ 1,456,739 6.5 % Total risk-based capital 3,045,652 13.59 1,792,910 8.0 2,241,137 10.0 Tier 1 risk-based capital 2,688,168 11.99 1,344,682 6.0 1,792,910 8.0 Tier 1 leverage capital 2,688,168 8.32 1,291,980 4.0 1,614,975 5.0 Webster Bank CET1 risk-based capital $ 2,791,474 12.46 % $ 1,008,027 4.5 % $ 1,456,039 6.5 % Total risk-based capital 3,071,505 13.71 1,792,048 8.0 2,240,060 10.0 Tier 1 risk-based capital 2,791,474 12.46 1,344,036 6.0 1,792,048 8.0 Tier 1 leverage capital 2,791,474 8.65 1,291,415 4.0 1,614,268 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 ending on January 1, 2022, and subsequent three-year transition period ending on December 31, 2024. As a result, capital ratios and amounts exclude the impact of the increased ACL on loans and leases, held-to-maturity debt securities, and unfunded loan commitments attributed 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.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share Basic And Diluted	The following table summarizes the calculation of basic and diluted earnings per common share: Years ended December 31, (In thousands, except per share data) 2021 2020 2019 Earnings for basic and diluted earnings per common share: Net income $ 408,864 $ 220,621 $ 382,723 Less: Preferred stock dividends 7,875 7,875 7,875 Net income available to common shareholders 400,989 212,746 374,848 Less: Earnings allocated to participating securities 2,302 1,272 1,863 Earnings applicable to common shareholders $ 398,687 $ 211,474 $ 372,985 Shares: Weighted-average common shares outstanding - basic 89,983 89,967 91,559 Effect of dilutive securities (1) 223 184 323 Weighted-average common shares outstanding - diluted 90,206 90,151 91,882 Earnings per common share: Basic $ 4.43 $ 2.35 $ 4.07 Diluted 4.42 2.35 4.06

Derivative Financial Instrument

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table presents the notional amounts and fair values, including accrued interest, of derivative positions: 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 At December 31, 2020 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 $ 40,854 $ 25,000 $ 110 Not designated as hedging instruments: Interest rate derivatives (1) 4,421,627 297,085 4,468,153 12,203 Mortgage banking derivatives (2) 40,771 855 — — Other (3) 108,987 264 360,497 377 Total not designated as hedging instruments 4,571,385 298,204 4,828,650 12,580 Gross derivative instruments, before netting $ 5,571,385 339,058 $ 4,853,650 12,690 Less: Master netting agreements 7,748 7,748 Cash collateral 33,972 4,550 Total derivative instruments, after netting $ 297,338 $ 392 (1) Balances related to CME are presented as a single unit of account. In accordance with its rule book, CME legally characterizes variation margin payments as settlement of derivatives rather than collateral against derivative positions. Notional amounts of interest rate swaps cleared through CME include $0.4 billion and $0.1 billion for asset derivatives and $2.6 billion and $3.2 billion for liability derivatives at December 31, 2021 and 2020, respectively. The related fair values approximate zero. (2) Notional amounts related to residential loans exclude approved floating rate commitments of $1.0 million at December 31, 2021. (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 $66.0 million and $80.5 million for asset derivatives and $338.2 million and $338.9 million for liability derivatives at December 31, 2021 and 2020, respectively, that have insignificant related fair values.
Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table presents fair value positions transitioned from gross to net upon applying counterparty netting agreements: At December 31, 2021 (In thousands) Gross Offset Net Amount on Balance Sheet Amounts Not Offset Net Amounts Asset derivatives $ 25,636 $ 25,636 $ — $ 51 $ 51 Liability derivatives 8,483 8,483 — 428 428 At December 31, 2020 (In thousands) Gross Offset Net Amount on Balance Sheet Amounts Not Offset Net Amounts Asset derivatives $ 41,774 $ 41,720 $ 54 $ 666 $ 720 Liability derivatives 12,352 12,298 54 265 319
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table summarizes the income statement effect of derivatives designated as cash flow hedges: Recognized In Years ended December 31, (In thousands) Net Interest Income 2021 2020 2019 Interest rate derivatives Long-term debt $ 411 $ 8,206 $ 4,241 Interest rate derivatives Interest and fees on loans and leases (10,676) (6,373) 1,314 Net recognized on cash flow hedges $ (10,265) $ 1,833 $ 5,555 The following table summarizes information related to a fair value hedging adjustment: 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 At December 31, At December 31, (In thousands) 2021 2020 2021 2020 Long-term debt $ 338,811 $ 344,164 $ 38,811 $ 44,164
Other Derivatives Not Designated For Hedge Accounting	The following table summarizes the income statement effect of derivatives not designated as hedging instruments: Recognized In Years ended December 31, (In thousands) Non-interest Income 2021 2020 2019 Interest rate derivatives Other income $ 10,369 $ 11,068 $ 8,477 Mortgage banking derivatives Mortgage banking activities (776) 636 (6) Other Other income 878 (1,696) 1,100 Total not designated as hedging instruments $ 10,471 $ 10,008 $ 9,571

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Option, Disclosures [Table Text Block]	The following table compares the fair value to unpaid principal balance of originated residential mortgage loans held for sale: At December 31, 2021 2020 (In thousands) Fair Value Unpaid Principal Balance Difference Fair Value Unpaid Principal Balance Difference Originated loans held for sale $ 4,694 $ 5,034 $ (340) $ 14,000 $ 13,511 $ 489
Fair Value Of Assets And Liabilities Measured On Recurring Basis	The following table summarizes the fair values of assets and liabilities measured at fair value on a recurring basis: 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 At December 31, 2020 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets: Available-for-sale investment securities: Agency CMO $ — $ 154,613 $ — $ 154,613 Agency MBS — 1,457,409 — 1,457,409 Agency CMBS — 1,117,233 — 1,117,233 CMBS — 508,018 — 508,018 CLO — 76,383 — 76,383 Corporate debt — 13,120 — 13,120 Total available-for-sale investment securities — 3,326,776 — 3,326,776 Gross derivative instruments, before netting (1) 205 338,853 — 339,058 Originated loans held for sale — 14,000 — 14,000 Investments held in Rabbi Trust 4,811 — — 4,811 Alternative investments (2) — — — 11,112 Total financial assets held at fair value $ 5,016 $ 3,679,629 $ — $ 3,695,757 Financial Liabilities: Gross derivative instruments, before netting (1) $ 218 $ 12,472 $ — $ 12,690 (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 in Note 17: 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 December 31, 2021 2020 (In thousands) Carrying Fair Carrying Fair Assets: Level 1 Cash and cash equivalents $ 461,570 $ 461,570 $ 263,104 $ 263,104 Level 2 Held-to-maturity investment securities 6,198,125 6,280,936 5,567,889 5,835,364 Level 3 Loans and leases, net 21,970,542 21,702,732 21,281,784 21,413,397 Mortgage servicing assets 9,237 12,527 13,422 14,362 Liabilities: Level 2 Deposit liabilities $ 28,049,259 $ 28,049,259 $ 24,847,618 $ 24,847,618 Time deposits 1,797,770 1,794,829 2,487,818 2,494,601 Securities sold under agreements to repurchase and other borrowings 674,896 676,581 995,355 1,000,189 FHLB advances 10,997 11,490 133,164 139,035 Long-term debt (1) 562,931 515,912 567,663 538,407

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	The following table summarizes the changes in the benefit obligation, fair value of plan assets, and funded status of the defined benefit pension and postretirement benefit plans at December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2021 2020 2021 2020 Change in benefit obligation: Beginning balance $ 266,414 $ 241,404 $ 2,046 $ 1,935 $ 1,998 $ 2,399 Interest cost 4,663 6,511 30 46 19 46 Actuarial (gain) loss (11,131) 27,376 (77) 194 32 (307) Benefits paid (9,683) (8,877) (126) (129) (145) (140) Ending balance 250,263 266,414 1,873 2,046 1,904 1,998 Change in plan assets: Beginning balance 266,268 239,621 — — — — Actual return on plan assets 15,261 35,524 — — — — Employer contributions — — 126 129 145 140 Benefits paid (9,683) (8,877) (126) (129) (145) (140) Ending balance 271,846 266,268 — — — — Funded status (1) $ 21,583 $ (146) $ (1,873) $ (2,046) $ (1,904) $ (1,998) (1) The overfunded (underfunded) status of each plan is respectively included in accrued interest receivable and other assets or accrued expenses and other liabilities on the accompanying Consolidated Balance Sheets, as applicable. The following table sets forth by level within the fair value hierarchy the pension plan's assets at fair value: At December 31, 2021 2020 (In thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Common collective trusts — 230,923 — 230,923 — 225,762 — 225,762 Registered investment companies $ 39,082 $ — $ — $ 39,082 $ 39,645 $ — $ — $ 39,645 Cash and cash equivalents 1,841 — — 1,841 861 — — 861 Total pension plan assets $ 40,923 $ 230,923 $ — $ 271,846 $ 40,506 $ 225,762 $ — $ 266,268
Schedule of Assumptions Used	The following table summarizes the weighted-average assumptions used to determine the benefit obligation at December 31: Pension Plan SERP OPEB 2021 2020 2021 2020 2021 2020 Discount rate 2.65 % 2.29 % 2.45 % 1.91 % 1.99 % 1.40 % Assumed healthcare cost trend rate n/a n/a n/a n/a 6.25 % 6.50 % The following table summarizes the weighted-average assumptions used to determine net periodic benefit (income) cost for the years ended December 31: Pension Plan SERP OPEB 2021 2020 2019 2021 2020 2019 2021 2020 2019 Discount rate 2.29 % 3.07 % 4.12 % 1.91 % 2.82 % 3.95 % 1.40 % 2.50 % 3.69 % Expected long-term rate of return on 5.50 % 5.75 % 6.00 % n/a n/a n/a n/a n/a n/a Assumed healthcare cost trend rate (1) n/a n/a n/a n/a n/a n/a 6.50 % 6.50 % 6.50 % (1) The assumed healthcare cost trend rate used to measure the expected cost of benefits covered by the OPEB for 2022 is 6.25%. The rate to which the healthcare cost trend rate is assumed to decline (ultimate trend rate) along with the year that the ultimate trend rate will be reached is 4.40% in 2030.
Schedule of Net Periodic Benefit Cost Not yet Recognized	The following table summarizes the amounts recorded in accumulated other comprehensive (loss) income that have not yet been recognized in net periodic benefit (income) cost at December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2021 2020 2021 2020 Net actuarial loss (gain) $ 41,792 $ 57,902 $ 658 $ 773 $ (620) $ (690) Deferred tax benefit (expense) 8,636 12,881 136 172 (128) (153) Net amount recorded in (AOCL) AOCI $ 33,156 $ 45,021 $ 522 $ 601 $ (492) $ (537)
Summary of Net Periodic Benefit Cost	The following table summarizes the components of net periodic benefit (income) cost for the years ended December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2019 2021 2020 2019 2021 2020 2019 Interest cost 4,663 6,511 7,941 30 46 65 19 46 85 Expected return on plan assets (14,385) (13,522) (11,436) — — — — — — Amortization of actuarial (gain) loss 4,102 4,027 5,705 38 23 14 (38) (74) (13) Net periodic benefit (income) cost (1) $ (5,620) $ (2,984) $ 2,210 $ 68 $ 69 $ 79 $ (19) $ (28) $ 72 (1) Net periodic benefit (income) cost is included in other non-interest expense on the accompanying Consolidated Statements of Income.
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)	The following table summarizes amounts recognized in other comprehensive (loss) income, including reclassification adjustments, for the years ended December 31: Pension Plan SERP OPEB (In thousands) 2021 2020 2019 2021 2020 2019 2021 2020 2019 Net actuarial (gain) loss $ (12,008) $ 5,375 $ (2,263) $ (77) $ 194 $ 164 $ 33 $ (307) $ (103) Amounts reclassified from (4,102) (4,027) (5,705) (38) (23) (14) 38 74 13 Total (gain) loss recognized in $ (16,110) $ 1,348 $ (7,968) $ (115) $ 171 $ 150 $ 71 $ (233) $ (90)
Schedule of Expected Benefit Payments	At December 31, 2021, the expected future benefit payments for the defined benefit pension and postretirement benefits plans are as follows: (In thousands) Pension Plan SERP OPEB 2022 $ 9,969 $ 116 $ 270 2023 10,345 117 247 2024 10,787 128 224 2025 11,207 126 201 2026 11,587 124 179 Thereafter 62,419 581 609
Schedule of Multiemployer Plans	The following table summarizes information related to Webster Bank's participation in the multi-employer plan: (Dollars in thousands) Contributions Funded Status Plan Name Employer Identification Number Plan Number Surcharge Imposed 2021 2020 2019 2021 2020 Pentegra Defined Benefit Plan 13-5645888 333 No $692 $998 $863 At least 80% At least 80%

Share-Based Plans (Tables)

Share-Based Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Summary of Restricted Stock and Stock Option Activity	The following table summarizes stock-based compensation plan activity for the year ended December 31, 2021: Non-Vested Restricted Stock Awards Outstanding Stock Options Outstanding Time-Based Performance-Based Number of Weighted-Average Number of Weighted-Average Number of Weighted-Average Balance at January 1, 2021 547,185 $ 46.59 250,666 $ 48.77 410,701 $ 23.35 Granted 195,749 54.60 83,853 54.68 — — Vested 186,211 48.93 65,213 51.99 — — Forfeited 27,439 46.65 2,889 50.45 — — Exercised — — — — 303,089 23.45 Balance at December 31, 2021 529,284 48.77 266,417 50.03 107,612 23.05

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Operating Results And Total Assets Reportable Segments	The following table presents balance sheet information, including the appropriate allocations, for Webster's reportable segments and the Corporate and Reconciling category: At December 31, 2021 (In thousands) Commercial HSA Retail Corporate and Consolidated Goodwill $ 131,000 $ 21,813 $ 385,560 $ — $ 538,373 Total assets 15,400,886 73,564 7,663,218 11,777,931 34,915,599 At December 31, 2020 (In thousands) Commercial HSA Retail Corporate and Consolidated Goodwill $ 131,000 $ 21,813 $ 385,560 $ — $ 538,373 Total assets 14,732,792 80,352 7,726,287 10,051,259 32,590,690 The following tables present operating results, including the appropriate allocations, for Webster’s reportable segments and the Corporate and Reconciling category: Year ended December 31, 2021 (In thousands) Commercial HSA Retail Corporate and Consolidated Net interest income $ 587,485 $ 168,595 $ 373,130 $ (228,121) $ 901,089 Non-interest income 112,270 102,814 67,155 41,133 323,372 Non-interest expense 257,461 135,997 296,260 55,382 745,100 Pre-tax, pre-provision net revenue 442,294 135,412 144,025 (242,370) 479,361 (Benefit) for credit losses (51,348) — (3,068) (84) (54,500) Income (loss) before income taxes 493,642 135,412 147,093 (242,286) 533,861 Income tax expense (benefit) 124,891 36,155 32,361 (68,410) 124,997 Net income (loss) $ 368,751 $ 99,257 $ 114,732 $ (173,876) $ 408,864 Year ended December 31, 2020 (In thousands) Commercial HSA Retail Corporate and Consolidated Net interest income $ 515,027 $ 162,363 $ 331,821 $ (117,818) $ 891,393 Non-interest income 90,498 100,826 74,147 19,806 285,277 Non-interest expense 260,953 140,637 317,215 40,141 758,946 Pre-tax, pre-provision net revenue 344,572 122,552 88,753 (138,153) 417,724 Provision (benefit) for credit losses 152,571 — (14,722) (99) 137,750 Income (loss) before income taxes 192,001 122,552 103,475 (138,054) 279,974 Income tax expense (benefit) 46,848 32,721 22,558 (42,774) 59,353 Net income (loss) $ 145,153 $ 89,831 $ 80,917 $ (95,280) $ 220,621 Year ended December 31, 2019 (In thousands) Commercial HSA Retail Corporate and Consolidated Net interest income $ 476,779 $ 172,685 $ 347,377 $ (41,714) $ 955,127 Non-interest income 91,184 97,041 77,149 19,941 285,315 Non-interest expense 252,485 135,586 317,494 10,385 715,950 Pre-tax, pre-provision net revenue 315,478 134,140 107,032 (32,158) 524,492 Provision for credit losses 29,714 — 8,086 — 37,800 Income (loss) before income taxes 285,764 134,140 98,946 (32,158) 486,692 Income tax expense (benefit) 70,298 35,547 20,581 (22,457) 103,969 Net income (loss) $ 215,466 $ 98,593 $ 78,365 $ (9,701) $ 382,723

Revenue from contracts with C_2

Revenue from contracts with Customers Revenue from Contracts with Customers Revenue from contracts with customers (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from External Customers by Products and Services [Table Text Block]	The following tables summarize revenues recognized in accordance with ASC Topic 606, Revenue from Contracts with Customers, along with other sources of non-interest income that subject to other GAAP topics, by reportable segment: Year ended December 31, 2021 (In thousands) Commercial HSA Retail Corporate and Consolidated Non-interest Income: Deposit service fees $ 16,946 $ 94,844 $ 50,548 $ 372 $ 162,710 Wealth and investment services 39,623 — — (37) 39,586 Other 1,237 7,970 903 — 10,110 Revenue from contracts with customers 57,806 102,814 51,451 335 212,406 Other sources of non-interest income 54,464 — 15,704 40,798 110,966 Total non-interest income $ 112,270 $ 102,814 $ 67,155 $ 41,133 $ 323,372 Year ended December 31, 2020 (In thousands) Commercial HSA Retail Corporate and Consolidated Non-interest Income: Deposit service fees $ 14,744 $ 92,693 $ 48,489 $ 106 $ 156,032 Wealth and investment services 32,951 — — (35) 32,916 Other 1,174 8,133 482 — 9,789 Revenue from contracts with customers 48,869 100,826 48,971 71 198,737 Other sources of non-interest income 41,629 — 25,176 19,735 86,540 Total non-interest income $ 90,498 $ 100,826 $ 74,147 $ 19,806 $ 285,277 Year ended December 31, 2019 (In thousands) Commercial HSA Retail Corporate and Consolidated Non-interest Income: Deposit service fees $ 15,694 $ 92,096 $ 60,014 $ 218 $ 168,022 Wealth and investment services 32,967 — — (35) 32,932 Other 1,151 4,945 1,243 — 7,339 Revenue from contracts with customers 49,812 97,041 61,257 183 208,293 Other sources of non-interest income 41,372 — 15,892 19,758 77,022 Total non-interest income $ 91,184 $ 97,041 $ 77,149 $ 19,941 $ 285,315

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Credit Related Financial Instruments	The following table summarizes the outstanding amounts of credit-related financial instruments with off-balance sheet risk: At December 31, (In thousands) 2021 2020 Commitments to extend credit $ 6,870,095 $ 6,517,840 Standby letters of credit 224,061 207,201 Commercial letters of credit 58,175 30,522 Total credit-related financial instruments with off-balance sheet risk $ 7,152,331 $ 6,755,563
Unfunded Commitments, Allowance For Credit Loss	The following table summarizes the activity in the ACL on unfunded loan commitments: Years ended December 31, (In thousands) 2021 2020 2019 Balance, beginning of period $ 12,755 $ 2,367 $ 2,506 Adoption of CECL — 9,139 — Provision (benefit) 349 1,249 (139) Balance, end of period $ 13,104 $ 12,755 $ 2,367

Parent Company Information (Tab

Parent Company Information (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Schedule of Parent Company Information Balance Sheet	CONDENSED BALANCE SHEETS December 31, (In thousands) 2021 2020 Assets: Cash and due from banks $ 316,193 $ 302,315 Intercompany debt securities 150,000 150,000 Investment in subsidiaries 3,526,782 3,340,556 Alternative investments 20,163 8,970 Other assets 3,953 8,122 Total assets $ 4,017,091 $ 3,809,963 Liabilities and shareholders’ equity: Senior notes $ 485,611 $ 490,343 Junior subordinated debt 77,320 77,320 Accrued interest payable 5,861 5,862 Due to subsidiaries 488 324 Other liabilities 9,486 1,489 Total liabilities 578,766 575,338 Shareholders’ equity 3,438,325 3,234,625 Total liabilities and shareholders’ equity $ 4,017,091 $ 3,809,963
Schedule of Parent Company Information Income Statement	CONDENSED STATEMENTS OF INCOME Years ended December 31, (In thousands) 2021 2020 2019 Income: Dividend income from bank subsidiary $ 200,000 $ 20,000 $ 360,000 Interest on securities and deposits 3,444 5,530 10,728 Alternative investments income (loss) 13,033 2,467 (256) Other non-interest income 75 634 382 Total income 216,552 28,631 370,854 Expense: Interest expense on borrowings 16,876 18,684 21,062 Non-interest expense 32,187 16,426 15,527 Total expense 49,063 35,110 36,589 Income (loss) before income taxes and equity in undistributed earnings of subsidiaries 167,489 (6,479) 334,265 Income tax benefit 3,121 4,572 4,671 Equity in undistributed earnings of subsidiaries 238,254 222,528 43,787 Net income $ 408,864 $ 220,621 $ 382,723
Schedule of Parent Company Information Comprehensive Income Statement	CONDENSED STATEMENTS OF COMPREHENSIVE INCOME Years ended December 31, (In thousands) 2021 2020 2019 Net income $ 408,864 $ 220,621 $ 382,723 Other comprehensive (loss) income, net of tax: Derivative instruments 226 2,622 1,479 Other comprehensive (loss) income of subsidiaries (65,062) 75,706 93,101 Other comprehensive (loss) income, net of tax (64,836) 78,328 94,580 Comprehensive income $ 344,028 $ 298,949 $ 477,303
Schedule of Parent Company Information Cash Flow Statement	CONDENSED STATEMENTS OF CASH FLOWS Years ended December 31, (In thousands) 2021 2020 2019 Operating activities: Net income $ 408,864 $ 220,621 $ 382,723 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of subsidiaries (238,254) (222,528) (43,787) Other, net 3,562 29,697 23,681 Net cash provided by operating activities $ 174,172 $ 27,790 $ 362,617 Investing activities: Alternative investments (capital call), net of distributions (6,304) (3,751) (1,850) Investment in subsidiaries — — (296,000) Net cash (used in) investing activities (6,304) (3,751) (297,850) Financing activities: Issuance of long-term debt — — 296,358 Cash dividends paid to common shareholders (145,223) (144,967) (140,783) Cash dividends paid to preferred shareholders (7,875) (7,875) (7,875) Exercise of stock options 3,492 240 619 Common stock repurchased and acquired from stock compensation plan activity (4,384) (80,062) (19,619) Net cash (used in) provided by financing activities (153,990) (232,664) 128,700 Net increase (decrease) in cash and cash equivalents 13,878 (208,625) 193,467 Cash and cash equivalents at beginning of year 302,315 510,940 317,473 Cash and cash equivalents at end of year $ 316,193 $ 302,315 $ 510,940

Summary of Significant Accoun_4

Summary of Significant Accounting Policies New Accounting Pronouncements - Narrative (Details)	12 Months Ended
	Dec. 31, 2021
Building and Building Improvements | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Leasehold Improvements | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Leasehold Improvements | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Furniture and Fixtures | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Furniture and Fixtures | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Information Technology and Data Processing | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Information Technology and Data Processing | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life	7 years

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Assets	$ 34,915,599	$ 32,590,690
Liabilities	31,477,274	29,356,065
Commitments approved	0	4,657	$ 0
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Commitments approved	10,100		$ 17,200
Other Assets [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	43,400	37,200
Accounts Payable and Accrued Liabilities [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Liabilities	11,100	10,200
Other Investments [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	61,500	34,300
Unfunded Loan Commitment [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable interest entities, total exposure of other investments including unfunded commitments	$ 95,900	$ 72,700

Business Developments - Narrati

Business Developments - Narrative (Details) $ / shares in Units, $ in Thousands	Jan. 31, 2022shares	Apr. 19, 2021shares	Dec. 31, 2021USD ($)$ / sharesshares	Oct. 30, 2020USD ($)	Dec. 16, 2019USD ($)
Restructuring Cost and Reserve [Line Items]
Preferred stock, shares authorized | shares			3,000,000
Value per share (in dollars per share)			$ 0.01
Merger-related expenses | $			$ 37,500
Sterling
Restructuring Cost and Reserve [Line Items]
Share exchange ratio		0.4630
Preferred stock, shares authorized | shares		200,000,000
Aggregate principal amount | $				$ 225,000	$ 274,000
Fixed-to-floating rate				3.875%	4.00%
Subsequent Event | Sterling
Restructuring Cost and Reserve [Line Items]
Preferred stock, shares authorized | shares	400,000,000
Shares issued (in shares) | shares	135,000
Series A Preferred Stock
Restructuring Cost and Reserve [Line Items]
Preferred stock, dividend rate (as a percent)			6.50%
Series G Preferred Stock
Restructuring Cost and Reserve [Line Items]
Preferred stock, dividend rate (as a percent)			6.50%
Value per share (in dollars per share)			$ 0.01
Preferred stock, liquidation preference per share (in usd per share)			1,000
Preferred Stock [Member]
Restructuring Cost and Reserve [Line Items]
Value per share (in dollars per share)			$ 25
Series F Preferred Stock [Member]
Restructuring Cost and Reserve [Line Items]
Preferred stock, dividend rate (as a percent)			5.25%
Value per share (in dollars per share)			$ 0.01
Preferred stock, liquidation preference per share (in usd per share)			$ 25,000

Business Developments - Costs I

Business Developments - Costs Incurred Related to Strategic Initiatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Severance and other benefits	$ (1,562)	$ 17,860
Professional fees and other related charges	8,569	10,788
ROU lease asset impairment	1,198	11,954
Other	(1,037)	2,055
Total strategic initiatives costs	$ 7,168	$ 42,657

Business Developments - Changes

Business Developments - Changes in Accrued Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	$ 19,795	$ 0
Additions charged to expense	10,909	28,648
Adjustments	(3,902)
Cash payments	(19,956)	(8,853)
Restructuring Reserve, Ending Balance	6,846	19,795
Severance and other benefits
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	17,675	0
Additions charged to expense	2,340	17,860
Adjustments	(3,902)
Cash payments	(10,994)	(185)
Restructuring Reserve, Ending Balance	5,119	17,675
Professional fees and other related charges
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	2,120	0
Additions charged to expense	8,569	10,788
Adjustments	0
Cash payments	(8,962)	(8,668)
Restructuring Reserve, Ending Balance	$ 1,727	$ 2,120

Investment Securities (Summary

Investment Securities (Summary Of Investment Securities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 6,198,339	$ 5,568,188
Unrealized Gains	138,254	269,717
Unrealized Losses	(55,657)	(2,541)
Fair Value	6,280,936	5,835,364
Debt Securities, Held-to-maturity, Allowance for Credit Loss	214	299	$ 0
Debt Securities, Held-to-maturity, Current	6,198,125	5,567,889
Interest Receivable	50,700	57,800
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	4,227,697	3,234,250
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	41,499	101,997
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	34,342	9,471
Investment securities available-for-sale, at fair value	4,234,854	3,326,776
Pledged Financial Instruments, Not Separately Reported, Debt Securities Held-to-Maturity	3,100,000	2,600,000
Pledged Financial Instruments, Not Separately Reported, Debt Securities Available-for-sale or Held-for-investment	1,800,000	1,300,000
Held-to-maturity Securities [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Interest Receivable	21,200	22,100
Available-for-sale Securities
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Interest Receivable	7,500
US Treasury and Government
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	398,664
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,698
Investment securities available-for-sale, at fair value	396,966
Collateralized Mortgage Obligations [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	42,405	91,622
Unrealized Gains	655	1,785
Unrealized Losses	(25)	(241)
Fair Value	43,035	93,166
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Current	42,405	91,622
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	88,109	148,711
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,326	6,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	51	98
Investment securities available-for-sale, at fair value	90,384	154,613
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	2,901,593	2,419,751
Unrealized Gains	71,444	137,863
Unrealized Losses	(11,788)	(84)
Fair Value	2,961,249	2,557,530
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Current	2,901,593	2,419,751
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	1,568,293	1,389,100
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	36,130	68,598
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	11,020	289
Investment securities available-for-sale, at fair value	1,593,403	1,457,409
Agency commercial mortgage-backed securities (agency CMBS) [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	2,378,475	2,101,227
Unrealized Gains	11,202	60,484
Unrealized Losses	(43,844)	(2,213)
Fair Value	2,345,833	2,159,498
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Current	2,378,475	2,101,227
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	1,248,548	1,092,430
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,537	26,317
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	18,544	1,514
Investment securities available-for-sale, at fair value	1,232,541	1,117,233
Commercial Mortgage Backed Securities [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	169,948	216,081
Unrealized Gains	3,381	9,214
Unrealized Losses	0	0
Fair Value	173,329	225,295
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Current	169,948	216,081
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	887,640	512,759
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	506	1,082
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,883	5,823
Investment securities available-for-sale, at fair value	886,263	508,018
Collateralized loan obligations (CLO) [Member]
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	21,860	76,693
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	13	310
Investment securities available-for-sale, at fair value	21,847	76,383
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	14,583	14,557
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,133	1,437
Investment securities available-for-sale, at fair value	13,450	13,120
Municipal Bonds [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	705,918	739,507
Unrealized Gains	51,572	60,371
Unrealized Losses	0	(3)
Fair Value	757,490	799,875
Debt Securities, Held-to-maturity, Allowance for Credit Loss	214	299
Debt Securities, Held-to-maturity, Current	705,704	$ 739,208
Callable [Member]
Debt Securities, Available-for-sale [Abstract]
Investment securities available-for-sale, at fair value	$ 1,600,000

Investment Securities (Summar_2

Investment Securities (Summary Of Gross Unrealized Losses Not Considered OTTI) (Detail) $ in Thousands	Dec. 31, 2021USD ($)holding	Dec. 31, 2020USD ($)holding
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 2,272,641	$ 894,628
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(17,086)	(7,699)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	558,515	61,347
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (17,256)	$ (1,772)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	162	88
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,831,156	$ 955,975
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(34,342)	(9,471)
US Treasury and Government
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	396,966
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,698)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	8
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 396,966
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,698)
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	7,895	13,137
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(51)	(49)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	5,944
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ (49)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	2	5
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 7,895	$ 19,081
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(51)	(98)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	506,602	33,742
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(7,354)	(219)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	110,687	4,561
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3,666)	$ (70)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	70	30
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 617,289	$ 38,303
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(11,020)	(289)
Agency commercial mortgage-backed securities (agency CMBS) [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	632,213	376,330
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6,163)	(1,514)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	335,480	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (12,381)	$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	28	8
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 967,693	$ 376,330
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(18,544)	(1,514)
Commercial Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	724,762	409,591
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,744)	(5,486)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	81,253	23,167
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (139)	$ (337)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	50	38
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 806,015	$ 432,758
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,883)	(5,823)
Collateralized loan obligations (CLO) [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		57,728
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(265)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	21,848	18,655
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (13)	$ (45)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	1	4
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 21,848	$ 76,383
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(13)	(310)
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	4,203	4,100
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(76)	(166)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	9,247	9,020
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,057)	$ (1,271)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	3	3
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 13,450	$ 13,120
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (1,133)	$ (1,437)

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Investment securities available-for-sale, at fair value	$ 4,234,854	$ 3,326,776
Callable [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities available-for-sale, at fair value	$ 1,600,000

Investment Securities (Summar_3

Investment Securities (Summary Of Sale Proceeds Of Available For Sale Securities) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of available-for-sale securities	$ 0	$ 8,963	$ 70,087
Gains			773
Losses			744
Debt Securities, Available-for-sale, Realized Gain (Loss)	$ 0	$ (8)	$ (29)

Investment Securities (Summar_4

Investment Securities (Summary Of Debt Securities By Contractual Maturity) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	$ 0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	401,668
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	113,288
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	3,712,741
Debt Securities, Available-for-sale, Amortized Cost	4,227,697	$ 3,234,250
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	400,037
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	113,260
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	3,721,557
Available for Sale, Fair Value - Total debt securities	4,234,854	3,326,776
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	180
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	7,425
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	292,727
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost	5,898,007
Amortized Cost	6,198,339	5,568,188
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	180
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	7,712
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	304,190
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	5,968,854
Debt Securities, Held-to-maturity, Fair Value	$ 6,280,936	$ 5,835,364

Investment Securities (Summar_5

Investment Securities (Summary of Debt Securities Held-to-Maturity) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	$ 6,198,339	$ 5,568,188
Interest Receivable	50,700	57,800
Collateralized Mortgage Obligations [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	42,405	91,622
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	2,901,593	2,419,751
Agency commercial mortgage-backed securities (agency CMBS) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	2,378,475	2,101,227
Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	705,918	739,507
Commercial Mortgage Backed Securities [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	169,948	216,081
Moody's, Aaa Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	377,374	425,457
Moody's, Aaa Rating [Member] | Collateralized Mortgage Obligations [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	0	0
Moody's, Aaa Rating [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	0	0
Moody's, Aaa Rating [Member] | Agency commercial mortgage-backed securities (agency CMBS) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	0	0
Moody's, Aaa Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	207,426	209,376
Moody's, Aaa Rating [Member] | Commercial Mortgage Backed Securities [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	169,948	216,081
Moody's, Aa1 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	5,442,277	4,777,656
Moody's, Aa1 Rating [Member] | Collateralized Mortgage Obligations [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	42,405	91,622
Moody's, Aa1 Rating [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	2,901,593	2,419,751
Moody's, Aa1 Rating [Member] | Agency commercial mortgage-backed securities (agency CMBS) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	2,378,475	2,101,227
Moody's, Aa1 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	119,804	165,056
Moody's, Aa1 Rating [Member] | Commercial Mortgage Backed Securities [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	0	0
Moody's, Aa2 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	227,106	201,081
Moody's, Aa2 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	227,106	201,081
Moody's, Aa3 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	104,232	115,619
Moody's, Aa3 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	104,232	115,619
Moody's, A1 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	35,878	33,264
Moody's, A1 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	35,878	33,264
Moody's, A2 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	8,260	8,475
Moody's, A2 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	8,260	8,475
Moody's, A3 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	0	2,066
Moody's, A3 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	0	2,066
Moody's, Baa2 Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	95	190
Moody's, Baa2 Rating [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	95	190
Moody's, Not Rated [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	3,117	4,380
Moody's, Not Rated [Member] | Municipal Bonds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity securities	$ 3,117	$ 4,380

Investment Securities (Debt and

Investment Securities (Debt and Equity Securities Allowance for Credit Losses) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 214	$ 299		$ 0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery	$ (85)	$ (98)
Cumulative Effect, Period of Adoption, Adjustment [Member]
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-maturity, Allowance for Credit Loss			$ 397

Loans and Leases (Detail)

Loans and Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 22,271,729	$ 21,641,215
Unamortized premiums	12,300	(10,500)
Pledged loans as collateral	7,800,000
Interest Receivable	50,700	57,800
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	15,179,966
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	6,603,180
Commercial Portfolio Segment [Member] | Equipment Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	627,058	602,224
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	6,882,480	7,085,076
Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,067,248	890,598
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	7,091,763
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,593,559	1,802,865
Consumer Portfolio Segment [Member] | 522291 Consumer Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	85,299	155,799
Consumer Portfolio Segment [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 5,412,905	$ 4,782,016

Loans and Leases (Summary Of Lo

Loans and Leases (Summary Of Loan And Lease Portfolio Aging By Class Of Loan) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total Loans and Leases		$ 21,641,215
90 or More Days Past Due and Accruing	$ 2,496	445
Non-accrual	109,927	167,960
Total  Past Due and Non-accrual	131,842	200,942
Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,091,763	6,740,680
Non-accrual	39,460	72,763
Total  Past Due and Non-accrual	48,667	92,177
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases		1,802,865
Non-accrual	23,489	31,030
Total  Past Due and Non-accrual	28,556	38,301
Consumer Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual	224	652
Total  Past Due and Non-accrual	784	2,131
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases		4,782,016
Non-accrual	15,747	41,081
Total  Past Due and Non-accrual	19,327	51,745
Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	15,179,966	14,900,535
Non-accrual	70,467	95,197
Total  Past Due and Non-accrual	83,175	108,765
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,603,180	6,322,637
Non-accrual	5,046	21,231
Total  Past Due and Non-accrual	6,490	24,250
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,882,480	7,085,076
Non-accrual	59,607	64,073
Total  Past Due and Non-accrual	69,837	66,033
Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,067,248	890,598
Non-accrual	2,086	2,594
Total  Past Due and Non-accrual	2,086	3,768
Commercial Portfolio Segment [Member] | 6172 Finance Lessors [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual	3,728	7,299
Total  Past Due and Non-accrual	4,762	14,714
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	12,329	20,005
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,058	10,712
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,467	5,500
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	379	878
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,212	4,334
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,271	9,293
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	508	2,400
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,729	612
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	1,174
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | 6172 Finance Lessors [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,034	5,107
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,090	12,532
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,149	8,702
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,600	1,771
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	181	601
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	368	6,330
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,941	3,830
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	417	619
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,524	903
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | 6172 Finance Lessors [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	2,308
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	2,496	445
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	519	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	1,977	445
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | 6172 Finance Lessors [Member]
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due and Accruing	0	0
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	22,139,887	21,440,273
Financial Asset, Not Past Due | Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,043,096	6,648,503
Financial Asset, Not Past Due | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,565,003	1,764,564
Financial Asset, Not Past Due | Consumer Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	84,515	153,668
Financial Asset, Not Past Due | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,393,578	4,730,271
Financial Asset, Not Past Due | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	15,096,791	14,791,770
Financial Asset, Not Past Due | Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,596,690	6,298,387
Financial Asset, Not Past Due | Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,812,643	7,019,043
Financial Asset, Not Past Due | Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,065,162	886,830
Financial Asset, Not Past Due | Commercial Portfolio Segment [Member] | 6172 Finance Lessors [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 622,296	$ 587,510

Loans and Leases (Narrative) (D

Loans and Leases (Narrative) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan
Loans and Leases Receivable Disclosure [Abstract]
Interest on non-accrual loans that would have been recorded as additional interest income	$ 11,000	$ 9,700	$ 11,300
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans and Leases | loan	150	192	136
Decrease in ACL on loans and leases	$ 58,200
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Abstract]
Write-down of TDR's	$ (3,000)	$ (17,600)	$ (20,300)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans and Leases | loan	0	4
Financing Receivable, Troubled Debt Restructuring, Subsequent Default		$ 12,400

Loans and Leases (Allowance For

Loans and Leases (Allowance For Loan And Lease Losses By Portfolio Segment) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 359,431	$ 209,096	$ 212,353
Provision (benefit) charged to expense	(54,415)	137,848	37,800
Losses charged off	(18,654)	(55,333)	(52,480)
Recoveries	14,825	10,252	11,423
Specific reserves for TDR included in the balance of ALLL	301,187	359,431	209,096
Individually evaluated for impairment	21,073	16,137	14,249
Collectively evaluated for impairment	280,114	343,294	194,847
Loans and leases	22,271,729	21,641,215
Cumulative Effect, Period of Adoption, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	0		0	$ 57,568
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	47,187	47,427	48,280
Provision (benefit) charged to expense	(5,764)	(18,488)	8,626
Losses charged off	(9,217)	(12,408)	(19,153)
Recoveries	11,104	7,112	9,674
Specific reserves for TDR included in the balance of ALLL	43,310	47,187	47,427
Individually evaluated for impairment	4,108	4,450	4,821
Collectively evaluated for impairment	39,202	42,737	42,606
Loans and leases	7,091,763
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	0		0	23,544
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	312,244	161,669	164,073
Provision (benefit) charged to expense	(48,651)	156,336	29,174
Losses charged off	(9,437)	(42,925)	(33,327)
Recoveries	3,721	3,140	1,749
Specific reserves for TDR included in the balance of ALLL	257,877	312,244	161,669
Individually evaluated for impairment	16,965	11,687	9,428
Collectively evaluated for impairment	240,912	$ 300,557	152,241
Loans and leases	15,179,966
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	$ 0		$ 0	$ 34,024

Loans and Leases (Commercial, C

Loans and Leases (Commercial, Commercial Real Estate Loans And Equipment Financing Loans Segregated By Risk Rating Exposure) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Total Loans and Leases	$ 22,271,729	$ 21,641,215

Loans and Leases (Summary Of Th

Loans and Leases (Summary Of The Recorded Investment Of Company's TDRs) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDR	$ 163,344	$ 235,427
Specific reserves for TDR included in the balance of ALLL	301,187	359,431	$ 209,096	$ 212,353
Additional funds committed to borrowers in TDR status	5,975	12,895
Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDR included in the balance of ALLL	257,877	312,244	161,669	164,073
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	3,000	17,600	20,300
Consumer Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDR included in the balance of ALLL	43,310	47,187	47,427	$ 48,280
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	400	800	$ 1,500
Performing Financial Instruments [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDR	110,625	140,089
Nonperforming Financial Instruments [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDR	52,719	95,338
Troubled Debt Restructures [Member] | Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDR included in the balance of ALLL	9,017	8,657
Troubled Debt Restructures [Member] | Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for TDR included in the balance of ALLL	$ 3,745	$ 4,071

Loans and Leases (Information o

Loans and Leases (Information on How Loans and Leases were Modified as a TDR) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	150	192	136
Post-Modification Recorded Investment | $	$ 21,977	$ 55,691	$ 88,771
Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	4
Commercial, Non-Mortgage | Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	8	11	15
Post-Modification Recorded Investment | $	$ 605	$ 1,070	$ 2,413
Commercial, Non-Mortgage | Commercial Portfolio Segment [Member] | Adjusted Interest Rates [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	1	2
Post-Modification Recorded Investment | $	$ 0	$ 96	$ 112
Commercial, Non-Mortgage | Commercial Portfolio Segment [Member] | Combination Rate and Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	9	7	11
Post-Modification Recorded Investment | $	$ 352	$ 607	$ 673
Commercial, Non-Mortgage | Commercial Portfolio Segment [Member] | Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	12	24	28
Post-Modification Recorded Investment | $	$ 14,160	$ 40,128	$ 65,186
Commercial Real Estate [Member] | Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	1	1	3
Post-Modification Recorded Investment | $	$ 183	$ 72	$ 8,356
Commercial Real Estate [Member] | Commercial Portfolio Segment [Member] | Combination Rate and Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	2	0
Post-Modification Recorded Investment | $	$ 0	$ 377	$ 0
Commercial Real Estate [Member] | Commercial Portfolio Segment [Member] | Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	1	3	3
Post-Modification Recorded Investment | $	$ 1,582	$ 306	$ 4,816
Residential Mortgage [Member] | Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	1	3	7
Post-Modification Recorded Investment | $	$ 99	$ 485	$ 1,327
Residential Mortgage [Member] | Consumer Portfolio Segment [Member] | Combination Rate and Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	2	10	15
Post-Modification Recorded Investment | $	$ 401	$ 1,133	$ 2,241
Residential Mortgage [Member] | Consumer Portfolio Segment [Member] | Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	3	26	8
Post-Modification Recorded Investment | $	$ 280	$ 4,215	$ 1,001
Home Equity Loan [Member] | Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	85	3	6
Post-Modification Recorded Investment | $	$ 1,809	$ 188	$ 599
Home Equity Loan [Member] | Consumer Portfolio Segment [Member] | Combination Rate and Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	6	5	4
Post-Modification Recorded Investment | $	$ 1,025	$ 334	$ 140
Home Equity Loan [Member] | Consumer Portfolio Segment [Member] | Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	22	96	34
Post-Modification Recorded Investment | $	$ 1,481	$ 6,680	$ 1,907

Loans and Leases (Investments i

Loans and Leases (Investments in TDRs, Segregated by Risk Rating Exposure) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total recorded investment of TDRs	$ 163,344	$ 235,427

Loans and Leases (Credit Qualit

Loans and Leases (Credit Quality Indicators) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases	$ 22,271,729	$ 21,641,215
Total Loans and Leases		21,641,215
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,223,304
Financing Receivable, Year One, Originated, Current Fiscal Year	2,198,697
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,077,624
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	502,707
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	144,883
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	274,746
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,669,802
Loans and leases	7,091,763
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		1,345,637
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		853,627
Total Loans and Leases	7,091,763	6,740,680
Financing Receivable, Excluding Accrued Interest, Revolving		1,392,880
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		253,438
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		578,606
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		447,194
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		1,869,298
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	27,795
Financing Receivable, Year One, Originated, Current Fiscal Year	4,515
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	14,955
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	27,068
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8,654
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,473
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	839
Loans and leases	85,299
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		32,857
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		65,114
Total Loans and Leases		155,799
Financing Receivable, Excluding Accrued Interest, Revolving		23,691
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		26,238
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		1,468
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		5,411
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		1,020
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	2,096,428
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	999,477
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	448,723
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	96,219
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	246,929
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,525,129
Loans and leases	5,412,905
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		1,231,789
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		746,435
Total Loans and Leases		4,782,016
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		167,979
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		536,400
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		402,761
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		1,696,652
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,195,509
Financing Receivable, Year One, Originated, Current Fiscal Year	97,754
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	63,192
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	26,916
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	40,010
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	26,344
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	143,834
Loans and leases	1,593,559	1,802,865
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		80,991
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		42,078
Total Loans and Leases		1,802,865
Financing Receivable, Excluding Accrued Interest, Revolving		1,369,189
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		59,221
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		40,738
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		39,022
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		171,626
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	2,268,891
Financing Receivable, Year One, Originated, Current Fiscal Year	3,902,968
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,337,777
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,272,548
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,772,381
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	796,050
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,829,351
Loans and leases	15,179,966
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		4,116,181
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		2,781,504
Total Loans and Leases	15,179,966	14,900,535
Financing Receivable, Excluding Accrued Interest, Revolving		1,835,397
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		2,475,137
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		909,133
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		1,198,615
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		1,584,568
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	55,610
Financing Receivable, Year One, Originated, Current Fiscal Year	1,375,401
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	872,710
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,331,463
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,043,850
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	467,128
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,457,018
Loans and leases	6,603,180
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		966,426
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,472,718
Total Loans and Leases	6,603,180	6,322,637
Financing Receivable, Excluding Accrued Interest, Revolving		28,113
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		1,334,949
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		593,209
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		639,091
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		1,288,131
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member] | (7) Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	95
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,084
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	119,676
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	51,536
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	79,096
Loans and leases	253,487
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		27
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		10,385
Total Loans and Leases		224,104
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		70,704
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		35,617
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		37,539
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		69,832
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member] | (1) - (6) Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	55,610
Financing Receivable, Year One, Originated, Current Fiscal Year	1,375,306
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	869,144
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,331,236
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	916,868
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	401,718
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,339,942
Loans and leases	6,289,824
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		965,582
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,461,201
Total Loans and Leases		5,945,110
Financing Receivable, Excluding Accrued Interest, Revolving		28,113
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		1,242,322
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		554,630
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		527,931
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		1,165,331
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member] | (8) Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	482
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	227
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	7,306
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13,874
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	37,980
Loans and leases	59,869
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		817
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,132
Total Loans and Leases		153,423
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		21,923
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		2,962
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		73,621
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		52,968
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,233,773
Financing Receivable, Year One, Originated, Current Fiscal Year	2,288,196
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,249,399
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	825,657
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	667,171
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	307,613
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	310,671
Loans and leases	6,882,480	7,085,076
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		2,858,624
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,137,847
Total Loans and Leases	6,882,480	7,085,076
Financing Receivable, Excluding Accrued Interest, Revolving		1,024,172
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		1,035,468
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		255,172
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		518,078
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		255,715
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member] | (7) Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	27,808
Financing Receivable, Year One, Originated, Current Fiscal Year	14,216
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	22,892
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	37,877
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,575
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,721
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	15,399
Loans and leases	143,488
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		32,535
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		33,969
Total Loans and Leases		189,583
Financing Receivable, Excluding Accrued Interest, Revolving		38,496
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		62,034
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		8,357
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		435
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		13,757
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member] | (1) - (6) Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,182,562
Financing Receivable, Year One, Originated, Current Fiscal Year	2,270,320
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,179,620
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	757,343
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	581,633
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	292,637
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	275,789
Loans and leases	6,539,904
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		2,771,373
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,052,080
Total Loans and Leases		6,597,757
Financing Receivable, Excluding Accrued Interest, Revolving		936,592
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		907,110
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		231,280
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		481,321
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		218,001
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member] | (8) Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	23,403
Financing Receivable, Year One, Originated, Current Fiscal Year	3,660
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	46,887
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	30,437
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	69,963
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5,255
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	19,483
Loans and leases	199,088
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		54,716
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		51,798
Total Loans and Leases		297,573
Financing Receivable, Excluding Accrued Interest, Revolving		49,084
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		66,324
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		15,535
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		36,159
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		23,957
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member] | (9) Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Total Loans and Leases		163
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		163
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		0
Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	979,508
Financing Receivable, Year One, Originated, Current Fiscal Year	7,609
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	19,141
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	14,896
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	14,131
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,113
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	25,850
Loans and leases	1,067,248	890,598
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		26,344
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		18,464
Total Loans and Leases	1,067,248	890,598
Financing Receivable, Excluding Accrued Interest, Revolving		783,112
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		23,898
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		10,963
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		11,333
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		16,484
Commercial Portfolio Segment [Member] | Asset Based Lending [Member] | (7) Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	59,012
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	675
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Loans and leases	59,687
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Total Loans and Leases		42,462
Financing Receivable, Excluding Accrued Interest, Revolving		41,687
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		775
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		0
Commercial Portfolio Segment [Member] | Asset Based Lending [Member] | (1) - (6) Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	920,496
Financing Receivable, Year One, Originated, Current Fiscal Year	7,609
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	19,141
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	12,810
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	13,456
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,113
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	25,850
Loans and leases	1,005,475
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		26,344
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		15,960
Total Loans and Leases		845,543
Financing Receivable, Excluding Accrued Interest, Revolving		741,336
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		23,123
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		10,963
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		11,333
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		16,484
Commercial Portfolio Segment [Member] | Asset Based Lending [Member] | (8) Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,086
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Loans and leases	2,086
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		2,504
Total Loans and Leases		2,593
Financing Receivable, Excluding Accrued Interest, Revolving		89
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		0
Commercial Portfolio Segment [Member] | Equipment Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	231,762
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	196,527
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	100,532
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	47,229
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15,196
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	35,812
Loans and leases	627,058	602,224
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		264,787
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		152,475
Total Loans and Leases		602,224
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		80,822
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		49,789
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		30,113
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		24,238
Commercial Portfolio Segment [Member] | Equipment Loan [Member] | (7) Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	108
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,229
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,341
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	600
Loans and leases	6,278
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		7,934
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		11,043
Total Loans and Leases		29,543
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		6,981
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		1,577
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		1,220
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		788
Commercial Portfolio Segment [Member] | Equipment Loan [Member] | (1) - (6) Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	231,762
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	188,031
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	93,547
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	41,276
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,864
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	32,588
Loans and leases	602,068
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		249,370
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		135,263
Total Loans and Leases		545,506
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		68,092
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		43,469
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		26,433
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		22,879
Commercial Portfolio Segment [Member] | Equipment Loan [Member] | (8) Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	8,388
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,756
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,612
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	332
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,624
Loans and leases	18,712
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		7,483
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		6,169
Total Loans and Leases		27,175
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		5,749
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		4,743
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		2,460
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		571
579 and below [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,196
Financing Receivable, Year One, Originated, Current Fiscal Year	147
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	87
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	215
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	159
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	40
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	21
Loans and leases	1,865
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		608
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		982
Total Loans and Leases		3,953
Financing Receivable, Excluding Accrued Interest, Revolving		1,428
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		500
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		37
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		183
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		215
579 and below [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	9,478
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,051
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	49,252
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	390
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,519
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	33,216
Loans and leases	95,906
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		36,498
Total Loans and Leases		97,422
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		673
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		3,179
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		3,278
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		53,794
579 and below [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	22,552
Financing Receivable, Year One, Originated, Current Fiscal Year	380
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	446
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	725
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,060
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	434
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,666
Loans and leases	31,263
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		129
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		919
Total Loans and Leases		41,735
Financing Receivable, Excluding Accrued Interest, Revolving		30,501
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		880
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		1,073
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		1,070
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		7,163
800+ [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	10,160
Financing Receivable, Year One, Originated, Current Fiscal Year	463
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,343
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,398
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	916
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	231
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	118
Loans and leases	15,629
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		2,827
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		5,725
Total Loans and Leases		19,296
Financing Receivable, Excluding Accrued Interest, Revolving		7,171
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		2,610
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		115
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		658
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		190
800+ [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	590,238
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	428,118
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	161,664
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	35,502
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	105,198
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	735,517
Loans and leases	2,056,237
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		360,336
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		283,755
Total Loans and Leases		1,957,569
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		61,048
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		268,044
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		178,849
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		805,537
800+ [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	463,334
Financing Receivable, Year One, Originated, Current Fiscal Year	35,678
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	30,157
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	9,591
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	16,347
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	11,068
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	58,189
Loans and leases	624,364
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		30,604
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		16,567
Total Loans and Leases		706,563
Financing Receivable, Excluding Accrued Interest, Revolving		542,600
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		25,205
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		17,192
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		14,439
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		59,956
740-799 [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	9,528
Financing Receivable, Year One, Originated, Current Fiscal Year	2,588
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,408
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8,303
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,985
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	77
Loans and leases	29,268
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		12,317
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		21,036
Total Loans and Leases		49,610
Financing Receivable, Excluding Accrued Interest, Revolving		5,119
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		8,925
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		457
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		1,493
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		263
740-799 [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	1,083,608
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	421,380
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	154,960
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	32,172
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	95,662
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	456,722
Loans and leases	2,244,504
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		654,973
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		288,173
Total Loans and Leases		1,803,817
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		58,249
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		176,286
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		133,416
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		492,720
740-799 [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	409,518
Financing Receivable, Year One, Originated, Current Fiscal Year	42,430
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	22,030
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	9,413
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	13,317
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	7,711
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	33,777
Loans and leases	538,196
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		34,797
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		13,565
Total Loans and Leases		570,062
Financing Receivable, Excluding Accrued Interest, Revolving		434,271
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		19,715
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		12,839
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		11,073
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		43,802
670 to 739 [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	5,644
Financing Receivable, Year One, Originated, Current Fiscal Year	1,061
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,034
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	13,602
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,859
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	607
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	412
Loans and leases	32,219
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		14,761
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		31,952
Total Loans and Leases		70,136
Financing Receivable, Excluding Accrued Interest, Revolving		8,403
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		11,843
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		665
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		2,284
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		228
670 to 739 [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	374,460
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	135,146
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	73,499
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	25,099
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	34,550
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	227,863
Loans and leases	870,617
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		199,329
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		118,620
Total Loans and Leases		757,383
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		39,125
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		76,666
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		75,375
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		248,268
670 to 739 [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	233,744
Financing Receivable, Year One, Originated, Current Fiscal Year	17,493
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	9,162
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,889
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8,220
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5,802
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	31,160
Loans and leases	311,470
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		13,753
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		8,855
Total Loans and Leases		370,609
Financing Receivable, Excluding Accrued Interest, Revolving		275,691
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		10,761
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		7,318
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		10,206
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		44,025
580-669 [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,267
Financing Receivable, Year One, Originated, Current Fiscal Year	256
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,083
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,550
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	735
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	216
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	211
Loans and leases	6,318
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		2,344
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		5,419
Total Loans and Leases		12,804
Financing Receivable, Excluding Accrued Interest, Revolving		1,570
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		2,360
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		194
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		793
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		124
580-669 [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0
Financing Receivable, Year One, Originated, Current Fiscal Year	38,644
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	13,782
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	9,348
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,056
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	71,811
Loans and leases	145,641
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		17,151
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		19,389
Total Loans and Leases		165,825
Financing Receivable, Excluding Accrued Interest, Revolving		0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		8,884
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		12,225
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		11,843
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		96,333
580-669 [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	66,361
Financing Receivable, Year One, Originated, Current Fiscal Year	1,773
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,397
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,298
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,066
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,329
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	15,042
Loans and leases	$ 88,266
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year		1,708
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year		2,172
Total Loans and Leases		113,896
Financing Receivable, Excluding Accrued Interest, Revolving		86,126
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year		2,660
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year		2,316
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year		2,234
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		$ 16,680

Loans and Leases (Impaired Coll

Loans and Leases (Impaired Collateral) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Collateral Pledged [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 16,600	$ 42,100
Collateral Pledged [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	34,900	60,800
Collateral Value [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 86,000	$ 150,300

Loans and Leases (Nonaccrual) (

Loans and Leases (Nonaccrual) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	$ 109,927	$ 167,960
Total  Past Due and Non-accrual	40,704	89,433
Interest on non-accrual loans that would have been recorded as additional interest income	11,000	9,700	$ 11,300
Commercial Portfolio Segment [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	70,467	95,197
Total  Past Due and Non-accrual	11,198	35,497
Commercial Portfolio Segment [Member] | Non-Real Estate Receivables [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	59,607	64,073
Total  Past Due and Non-accrual	4,802	16,985
Commercial Portfolio Segment [Member] | Asset Based Lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	2,086	2,594
Total  Past Due and Non-accrual	2,086	0
Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	5,046	21,231
Total  Past Due and Non-accrual	4,310	15,529
Commercial Portfolio Segment [Member] | 6172 Finance Lessors [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	3,728	7,299
Total  Past Due and Non-accrual	0	2,983
Consumer Portfolio Segment [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	39,460	72,763
Total  Past Due and Non-accrual	29,506	53,936
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	15,747	41,081
Total  Past Due and Non-accrual	10,584	29,843
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	23,489	31,030
Total  Past Due and Non-accrual	18,920	24,091
Consumer Portfolio Segment [Member] | 522291 Consumer Lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	224	652
Total  Past Due and Non-accrual	$ 2	$ 2

Transfers of Financial Assets_2

Transfers of Financial Assets (Reserve for loan repurchases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		$ 2,367	$ 2,506
(Benefit) provision charged to expense			(139)
Ending balance			2,367
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 747	508	674
(Benefit) provision charged to expense	73	141	1,865
Repurchased loans and settlements charged off	(72)	98	(2,031)
Ending balance	$ 748	$ 747	$ 508

Transfers of Financial Assets_3

Transfers of Financial Assets (Loans sold) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Assets at Fair Value [Line Items]
Net gain on sale	$ 6,219	$ 18,295	$ 6,115
Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Proceeds from sale	247,634	486,341	216,239
Net gain on sale	5,192	15,305	4,031
Ancillary Fee Income Generated by Servicing Financial Assets, Amount	1,440	3,230	1,614
Fair value option adjustment	(413)	(240)	470
Commercial Loan [Member]
Servicing Assets at Fair Value [Line Items]
Net gain on sale	3,900	300	700
Residential Mortgage Loans Servicing Retained [Member] | Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Proceeds from sale	$ 237,834	$ 464,736	$ 199,114

Transfers of Financial Assets_4

Transfers of Financial Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Retained servicing rights		$ 2,300,000
Proceeds from loans not originated for sale	$ 82,187	9,197	$ 20,931
Net gain on sale	6,219	18,295	6,115
Residential Mortgage [Member]
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Retained servicing rights	2,000,000
Bank servicing fees	1,700	1,500	1,900
Net gain on sale	5,192	15,305	4,031
Commercial Loan [Member]
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Proceeds from loans not originated for sale	82,200	9,200	20,900
Net gain on sale	$ 3,900	$ 300	$ 700

Transfers of Financial Assets S

Transfers of Financial Assets Servicing Assets at Amortized Cost Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning balance	$ 13,422	$ 17,484	$ 21,215
Additions	2,053	4,373	3,587
Amortization	(5,593)	(6,562)	(7,318)
Adjustment to valuation allowance	(645)	(1,873)	0
Ending balance	$ 9,237	$ 13,422	$ 17,484

Premises and Equipment (Summary

Premises and Equipment (Summary of Premises and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Land	$ 9,436	$ 9,436
Buildings and improvements	67,501	70,195
Leasehold improvements	65,606	71,332
Fixtures and equipment	64,890	73,730
Data processing and software	105,516	270,780
Total premises and equipment	312,949	495,473
Less: Accumulated depreciation and amortization	(228,318)	(396,211)
Premises and equipment, net	84,631	99,262
ROU lease assets, net	119,926	127,481
Property and equipment, net	204,557	226,743
Depreciation and amortization	$ 31,400	$ 32,500	$ 33,700

Premises and Equipment (Disclos

Premises and Equipment (Disclosure of Long Lived Assets Held-for-sale) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	$ 2,654	$ 0
Additions	(38)	2,654
Sales	(2,126)	0
Ending balance	$ 490	$ 2,654

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Leased assets impairment loss	$ 1.2	$ 12
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property and equipment, net	Property and equipment, net
Commercial Portfolio Segment [Member] | Equipment Loan [Member]
Lessee, Lease, Description [Line Items]
Sales-type and Direct Financing Leases, Interest Income	$ 7.5	$ 7.1	$ 5.5
Minimum [Member]
Lessee, Lease, Description [Line Items]
Financing leases, term	1 year
Lease term	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Financing leases, term	10 years
Lease term	15 years

Leases - Operating ROU Assets a

Leases - Operating ROU Assets and Lease Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 119,926	$ 127,481	$ 157,234
Operating Lease, Liability	$ 144,804	$ 158,280	$ 178,802

Leases - Summary of Net Investm

Leases - Summary of Net Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Sales-type Lease, Lease Receivable	$ 196,632	$ 207,508
Sales-type Lease, Unguaranteed Residual Asset	19,748	28,609
Net Investment in Lease	$ 216,380	$ 236,117

Leases - Summary of Net Inves_2

Leases - Summary of Net Investment Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
2022	$ 68,008
2023	59,554
2024	39,325
2025	29,534
2026	21,687
Thereafter	16,636
Total lease payments receivable	234,744
Present value adjustment	(18,364)
Total net investment	$ 216,380	$ 236,117

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease, Cost [Abstract]
Operating Lease, Cost	$ 26,076	$ 30,339	$ 29,908
Variable Lease, Cost	4,860	5,577	4,889
Sublease Income	(554)	(557)	(577)
Lease, Cost	30,382	35,359	34,220
Operating Lease, Payments	30,487	31,212	31,223
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 15,226	$ 9,211	$ 22,948
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months	8 years 14 days	8 years 4 months 20 days
Operating Lease, Weighted Average Discount Rate, Percent	3.04%	3.19%	3.31%

Leases - Maturity of Operating

Leases - Maturity of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due, Rolling Maturity [Abstract]
2022	$ 25,895
2023	26,539
2024	23,767
2025	21,792
2026	18,656
Lessee, Operating Lease, Liability, to be Paid, after Year Five	48,009
Lessee, Operating Lease, Liability, to be Paid, Total	164,658
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	19,854
Operating Lease, Liability	$ 144,804	$ 158,280	$ 178,802

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Gross Carrying Value And Accumulated Amortization Of Other Intangible Assets) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 538,373	$ 538,373
Gross Carrying Amount	47,625	47,625
Accumulated Amortization	(29,756)	(25,242)
Net Carrying Amount	17,869	22,383
Core Deposits [Member] | HSA Bank [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,625	26,625
Accumulated Amortization	(18,516)	(15,618)
Net Carrying Amount	8,109	11,007
Customer Relationships [Member] | HSA Bank [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,000	21,000
Accumulated Amortization	(11,240)	(9,624)
Net Carrying Amount	$ 9,760	$ 11,376

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Schedule Of Expected Future Amortization Expense) (Detail) $ in Thousands	Dec. 31, 2021USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 4,410
2021	4,315
2022	2,084
2023	2,084
2024	2,084
Thereafter	$ 2,892

Income Taxes (Income Tax Expens

Income Taxes (Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 109,621	$ 73,172	$ 84,447
State and local	20,374	17,417	18,595
Total current	129,995	90,589	103,042
Deferred:
Federal	(9,844)	(23,799)	811
State and local	4,846	(7,437)	116
Total deferred	(4,998)	(31,236)	927
Total:
Total federal	99,777	49,373	85,258
Total state and local	25,220	9,980	18,711
Income tax expense	$ 124,997	$ 59,353	$ 103,969

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Net tax credits	$ 2,600	$ 1,100	$ 4,800
Benefit from operating loss carryforwards	400
Increase (decrease) in deferred income taxes	28,100
Deferred tax expense (benefit)	(4,998)	(31,236)	927
Tax benefit directly allocated to shareholder's equity	23,200
Valuation allowance	37,374	37,374
Unrecognized deferred tax liability for thrift bad-debt reserves	15,300
Cumulative taxable temporary differences	58,000
Unrecognized tax benefits that would impact effective tax rate	3,500	3,500	3,900
Interest and penalties	300	100
Accrued interest and penalties related to UTBs	1,900	$ 1,700
Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Net tax credits	500		3,000
Research Tax Credit Carryforward, Qualifying Technology Expenditures Incurred Before 2019
Operating Loss Carryforwards [Line Items]
Net tax credits			$ 2,400
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance	37,400
Deferred tax assets, net operating loss carryforwards subject to expiration	630,800
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax assets, operating loss carryforwards	1,100,000
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Decrease in unrecognized tax benefits reasonably possible	1,600
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Decrease in unrecognized tax benefits reasonably possible	$ 2,600

Income Taxes (Schedule of Effec

Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense at federal statutory rate	$ 112,111	$ 58,795	$ 102,205
SALT expense, net of federal	19,924	7,884	14,782
Tax-exempt interest income, net	(6,814)	(7,181)	(6,752)
Increase in cash surrender value of life insurance	(3,030)	(3,058)	(3,069)
Tax deficiencies (excess tax benefits), net	(1,479)	484	(2,251)
Non-deductible FDIC deposit insurance premiums	2,064	2,172	1,904
Non-deductible merger-related expenses	3,451	0	0
Other, net	(1,230)	257	(2,850)
Income tax expense	$ 124,997	$ 59,353	$ 103,969
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax expense at federal statutory rate	21.00%	21.00%	21.00%
SALT expense, net of federal	3.70%	2.80%	3.00%
Tax-exempt interest income, net	(1.30%)	(2.60%)	(1.40%)
Increase in cash surrender value of life insurance	(0.60%)	(1.10%)	(0.60%)
Tax deficiencies (excess tax benefits), net	(0.30%)	0.20%	(0.40%)
Non-deductible FDIC deposit insurance premiums	0.40%	0.80%	0.40%
Non-deductible merger-related expenses	0.70%	0.00%	0.00%
Other, net	(0.20%)	0.10%	(0.60%)
Income tax expense and effective tax rate	23.40%	21.20%	21.40%

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan and lease losses	$ 78,905	$ 93,791
Net operating loss and credit carry forwards	64,366	66,840
Compensation and employee benefit plans	22,840	27,643
Lease liabilities under operating leases	38,130	41,679
Other	12,790	8,750
Gross deferred tax assets	217,031	238,703
Valuation allowance	(37,374)	(37,374)
Total deferred tax assets, net of valuation allowance	179,657	201,329
Deferred tax liabilities:
Net unrealized gain on securities available for sale	1,885	24,364
Net unrealized gain on derivatives	2,584	7,616
ROU assets under operating leases	31,580	33,569
Equipment financing leases	21,193	38,511
Premises and equipment	879	6,735
Goodwill and other intangible assets	5,690	5,954
Other	6,441	3,294
Gross deferred tax liabilities	70,252	120,043
Deferred tax assets, net	$ 109,405	$ 81,286

Income Taxes (Summary of Positi

Income Taxes (Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 4,252	$ 4,813	$ 2,856
Additions as a result of tax positions taken during the current year	294	87	1,106
Additions as a result of tax positions taken during prior years	434	572	1,744
Reductions as a result of tax positions taken during prior years	(186)	(694)	(238)
Reductions relating to settlements with taxing authorities	(267)	(130)	(18)
Reductions as a result of lapse of statute of limitation periods	(278)	(396)	(637)
Ending balance	$ 4,249	$ 4,252	$ 4,813

Deposits (Summary Of Deposits)

Deposits (Summary Of Deposits) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deposit Liabilities [Abstract]
Demand	$ 7,060,488	$ 6,155,592
Health Savings Accounts	7,397,582	7,120,017
Checking	4,182,497	3,652,763
Money market	3,718,953	2,940,215
Savings	5,689,739	4,979,031
Time deposits	1,797,770	2,487,818
Total interest-bearing	22,786,541	21,179,844
Total deposits	29,847,029	27,335,436
Time deposits and interest-bearing checking, included in above balances, obtained through brokers	120,392	720,440
Time deposits, included in above balance, that exceed the FDIC limit	256,522	504,543
Demand deposit overdrafts reclassified as loan balances	$ 1,577	$ 2,007

Deposits (Scheduled Maturities

Deposits (Scheduled Maturities Of Time Deposits) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deposit Liabilities [Abstract]
2020	$ 1,566,257
2021	115,321
2022	46,432
2023	49,849
2024	19,911
Total time deposits	$ 1,797,770	$ 2,487,818

Borrowings Borrowings - (Narrat

Borrowings Borrowings - (Narrative) (Details) - USD ($) $ in Billions	Dec. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
Total borrowings	$ 1.2	$ 1.7

Borrowings (Summary Of Securiti

Borrowings (Summary Of Securities Sold Under Agreements To Repurchase And Other Borrowings) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Total securities sold under agreements to repurchase	$ 674,896	$ 469,330
Fed funds purchased	0	526,025
Securities sold under agreements to repurchase and other borrowings	674,896	995,355
Original maturity of one year or less [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total securities sold under agreements to repurchase	474,896	269,330
Original maturity of greater than one year, non-callable [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total securities sold under agreements to repurchase	$ 200,000	$ 200,000
Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.47%	0.43%
Securities Sold under Agreements to Repurchase [Member] | Original maturity of one year or less [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.11%	0.13%
Securities Sold under Agreements to Repurchase [Member] | Original maturity of greater than one year, non-callable [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	1.32%	0.84%
Federal Funds Purchased [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.00%	0.08%
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.47%	0.25%

Borrowings (Summary Of Advances

Borrowings (Summary Of Advances Payable To The Federal Home Loan Bank) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Federal Home Loan Bank, Advances, Maturity, Rolling Year [Abstract]
FHLB advances maturing within 1 year, Weighted-Average Contractual Coupon Rate (as a percent)	0.00%	0.38%
FHLB advances maturing after 1 but within 2 years, Weighted-Average Contractual Coupon Rate (as a percent)	2.95%	0.00%
FHLB advances maturing after 2 but within 3 years, Weighted-Average Contractual Coupon Rate (as a percent)	0.00%	2.95%
FHLB advances maturing after 3 but within 4 years, Weighted-Average Contractual Coupon Rate (as a percent)	0.00%	1.59%
FHLB advances maturing after 4 but within 5 years, Weighted-Average Contractual Coupon Rate (as a percent)	0.00%	1.42%
FHLB advances maturing after 5 years, Weighted-Average Contractual Coupon Rate (as a percent)	2.03%	2.66%
Federal Home Loan Bank, Advances, Weighted Average Interest Rate (as a percent)	2.03%	1.36%
Aggregate carrying value of assets pledged as collateral	$ 7,556,034	$ 7,387,054
Remaining borrowing capacity	5,087,294	4,689,642
FHLB advances maturing within 1 year, Total Outstanding	90	25,000
FHLB advances maturing after 1 but within 2 years, Total Outstanding	202	110
FHLB advances maturing after 2 but within 3 years, Total Outstanding	0	215
FHLB advances maturing after 3 but within 4 years, Total Outstanding	0	50,000
FHLB advances maturing after 4 but within 5 years, Total Outstanding	0	50,000
FHLB advances maturing after 5 years, Total Outstanding	10,705	7,839
FHLB advances	$ 10,997	$ 133,164

Borrowings (Long-Term Debt) (De

Borrowings (Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Notes and subordinated debt	$ 566,131	$ 571,484
Debt issuance cost on senior fixed-rate notes	(2,226)	(2,628)
Long-term debt	$ 562,931	$ 567,663
Long term debt, variable interest rate, percentage	3.17%	3.18%
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		$ 44,164
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate spread of LIBOR plus (as a percent)	2.95%
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Notes and subordinated debt	$ 77,320	77,320
Long-term Debt [Member]
Debt Instrument [Line Items]
Discount on senior fixed-rate notes	(974)	(1,193)
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	38,800	44,200
Debt Instrument, Redemption, Period One [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Notes and subordinated debt	$ 150,000	150,000
Debt instrument, stated interest rate, percentage	4.375%
Debt Instrument, Redemption, Period Two | Senior Notes [Member]
Debt Instrument [Line Items]
Notes and subordinated debt	$ 338,811	$ 344,164
Debt instrument, stated interest rate, percentage	4.10%

Shareholders' Equity (Class of

Shareholders' Equity (Class of Stock Disclosure) (Details)	12 Months Ended
	Dec. 31, 2021shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock Held, beginning balance	3,487,389
Common Stock Outstanding, beginning balance	90,198,922
Restricted share activity	154,281
Stock options exercised	(230,418)
Treasury Stock Held, ending balance	3,102,690
Common Stock Outstanding, ending balance	90,583,621
Series F Preferred Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, beginning balance	6,000
Restricted share activity	0
Stock options exercised	0
Shares, ending balance	6,000
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, beginning balance	93,686,311
Restricted share activity	0
Stock options exercised	0
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted share activity	(154,281)
Stock options exercised	(230,418)

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)$ / sharesshares
Class of Stock [Line Items]
Stock repurchase program, authorized amount | $	$ 200,000
Common stock, shares issued | shares	93,686,311
Stock repurchase program, remaining authorized repurchase amount | $	$ 6,000
Common stock par value (in usd per share)	$ 0.01
Depositary shares, ownership of preferred shares	0.001
Value per share (in dollars per share)	$ 0.01
Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares issued | shares	93,686,311
Stock repurchase program, remaining authorized repurchase amount | $	$ 123,400
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percent)	5.25%
Value per share (in dollars per share)	$ 0.01
Preferred stock, liquidation preference per share (in usd per share)	25,000
Preferred Stock [Member]
Class of Stock [Line Items]
Value per share (in dollars per share)	$ 25

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss, Net of Tax (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 3,234,625	$ 3,207,770	$ 2,886,515
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Ending Balance	3,438,325	3,234,625	3,207,770
Available For Sale and Transferred Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	67,424	17,251	(71,374)
Other comprehensive (loss) income before reclassifications	(62,888)	50,179	88,647
Amounts reclassified from accumulated other comprehensive loss	0	(6)	(22)
Other comprehensive (loss) income, net of tax	(62,888)	50,173	88,625
Ending Balance	4,536	67,424	17,251
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	19,918	(9,184)	(9,313)
Other comprehensive (loss) income before reclassifications	(17,109)	20,667	(4,945)
Amounts reclassified from accumulated other comprehensive loss	3,261	8,435	5,074
Other comprehensive (loss) income, net of tax	(13,848)	29,102	129
Ending Balance	6,070	19,918	(9,184)
Defined Benefit Pension and Postretirement Benefit Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(45,086)	(44,139)	(49,965)
Other comprehensive (loss) income before reclassifications	8,876	(3,887)	1,622
Amounts reclassified from accumulated other comprehensive loss	3,024	2,940	4,204
Other comprehensive (loss) income, net of tax	11,900	(947)	5,826
Ending Balance	(33,186)	(45,086)	(44,139)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	42,256	(36,072)	(130,652)
Other comprehensive (loss) income before reclassifications	(71,121)	66,959	85,324
Amounts reclassified from accumulated other comprehensive loss	6,285	11,369	9,256
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Ending Balance	$ (22,580)	$ 42,256	$ (36,072)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss, Net of Tax (Schedule of Reclassifications from AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net (gain) on sale of investment securities	$ 0	$ 8	$ 29
Interest expense	(41,755)	(110,656)	(199,456)
Interest income	942,844	1,002,049	1,154,583
Income tax expense	(124,997)	(59,353)	(103,969)
Earnings applicable to common shareholders	398,687	211,474	372,985
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member] | Reclassification out of accumualted comprehensive income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net (gain) on sale of investment securities	0	8	29
Available For Sale and Transferred Securities [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	0	6	22
Available For Sale and Transferred Securities [Member] | Reclassification out of accumualted comprehensive income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	0	(2)	(7)
Earnings applicable to common shareholders	0	6	22
Derivative Instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	(3,261)	(8,435)	(5,074)
Derivative Instruments | Reclassification out of accumualted comprehensive income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(4,109)	(7,884)	(5,509)
Interest income	(306)	(3,536)	(1,323)
Income tax expense	1,154	2,985	1,758
Earnings applicable to common shareholders	(3,261)	(8,435)	(5,074)
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(4,102)	(3,976)	(5,706)
Defined benefit pension and postretirement benefit plans [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	1,078	1,036	1,502
Net of tax	$ (3,024)	$ (2,940)	$ (4,204)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Loss, Net of Tax (Schedule of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale securities:
Net unrealized loss during the period	$ (85,368)	$ 68,116	$ 120,333
Reclassification for net gain included in net income		(8)	(29)
Total available-for-sale securities	(85,368)	68,108	120,304
Derivative instruments:
Net unrealized (losses) arising during the year	(23,216)	27,683	(6,672)
Reclassification adjustment for net realized losses included in net income	4,415	11,420	6,832
Total derivative instruments	(18,801)	39,103	160
Defined benefit pension and other postretirement benefit plans:
Net actuarial gain arising during the year	12,052	(5,262)	2,202
Reclassification adjustment for amortization of net loss included in net income	4,102	3,976	5,706
Total (gain) loss recognized in OCI	(16,154)	1,286	(7,908)
Available-for-sale securities:
Net unrealized loss during the period	22,480	(17,937)	(31,686)
Reclassification for net gain included in net income		(2)	(7)
Total securities available-for-sale	(22,480)	17,935	31,679
Derivative instruments:
Net unrealized (losses) arising during the year	6,107	(7,016)	1,727
Reclassification adjustment for net realized losses included in net income	(1,154)	(2,985)	(1,758)
Total derivative instruments	4,953	(10,001)	(31)
Defined benefit pension and other postretirement benefit plans:
Current year actuarial loss	(3,176)	1,375	(580)
Reclassification adjustment for amortization of net loss included in net income	(1,078)	(1,036)	(1,502)
Total defined benefit pension and postretirement benefit plans	(4,254)	339	(2,082)
Available-for-sale securities:
Net unrealized loss during the period	(62,888)	50,179	88,647
Reclassification for net gain included in net income		(6)	(22)
Total available-for-sale securities	(62,888)	50,173	88,625
Derivative instruments:
Net unrealized (losses) arising during the year	(17,109)	20,667	(4,945)
Reclassification adjustment for net realized losses included in net income	3,261	8,435	5,074
Total derivative instruments	(13,848)	29,102	129
Defined benefit pension and other postretirement benefit plans:
Current year actuarial loss	8,876	(3,887)	1,622
Reclassification adjustment for amortization of net loss included in net income	3,024	2,940	4,204
Total defined benefit pension and postretirement benefit plans	11,900	(947)	5,826
Other Comprehensive Income (Loss), Pre-Tax Amount	(88,015)	105,925	128,372
Other Comprehensive Income (Loss), Tax Benefit (Expense)	23,179	(27,597)	(33,792)
Other comprehensive (loss) income, net of tax	$ (64,836)	$ 78,328	$ 94,580

Regulatory Matters (Information

Regulatory Matters (Information On The Capital Ratios) (Detail) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital	$ 2,804,290	$ 2,543,131
Common Equity Tier One Capital Required for Capital Adequacy	$ 1,076,871	$ 1,008,512
Common Equity Tier One Capital Ratio	0.1172	0.1135
Common Equity Tier One Capital Required to be Well-Capitalized	$ 1,555,480	$ 1,456,739
Total risk-based capital, Actual Amount	$ 3,265,064	$ 3,045,652
Total risk-based capital, Actual Ratio	0.1364	0.1359
Total risk-based capital, Capital Requirements, Minimum Amount	$ 1,914,436	$ 1,792,910
Total risk-based capital, Capital Requirements, Minimum Ratio	0.080	0.080
Total risk-based capital, Capital Requirements, Well Capitalized Amount	$ 2,393,046	$ 2,241,137
Total risk-based capital, Capital Requirements, Well Capitalized Ratio	0.100	0.100
Tier 1 risk-based capital, Actual Amount	$ 2,949,327	$ 2,688,168
Tier 1 risk-based capital, Actual Ratio	0.1232	0.1199
Tier 1 risk-based capital, Capital Requirements, Minimum Amount	$ 1,435,827	$ 1,344,682
Tier 1 risk-based capital, Capital Requirements, Minimum Ratio	0.060	0.060
Tier 1 risk-based capital, Capital Requirements, Well Capitalized Amount	$ 1,914,436	$ 1,792,910
Tier 1 risk-based capital, Capital Requirements, Well Capitalized Ratio	0.080	0.080
Tier 1 leverage capital, Actual Amount	$ 2,949,327	$ 2,688,168
Tier 1 leverage capital, Actual Ratio	0.0847	0.0832
Tier 1 leverage capital, Capital Requirements, Minimum Amount	$ 1,393,607	$ 1,291,980
Tier 1 leverage capital, Capital Requirements, Minimum Ratio	0.040	0.040
Tier 1 leverage capital, Capital Requirements, Well Capitalized Amount	$ 1,742,008	$ 1,614,975
Tier 1 leverage capital, Capital Requirements, Well Capitalized Ratio	0.050	0.050
Subsidiaries [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital	$ 3,034,883	$ 2,791,474
Common Equity Tier One Capital Required for Capital Adequacy	$ 1,075,920	$ 1,008,027
Common Equity Tier One Capital Ratio	0.1269	0.1246
Common Equity Tier One Capital Required to be Well-Capitalized	$ 1,554,107	$ 1,456,039
Total risk-based capital, Actual Amount	$ 3,273,300	$ 3,071,505
Total risk-based capital, Actual Ratio	0.1369	0.1371
Total risk-based capital, Capital Requirements, Minimum Amount	$ 1,912,747	$ 1,792,048
Total risk-based capital, Capital Requirements, Minimum Ratio	0.080	0.080
Total risk-based capital, Capital Requirements, Well Capitalized Amount	$ 2,390,934	$ 2,240,060
Total risk-based capital, Capital Requirements, Well Capitalized Ratio	0.100	0.100
Tier 1 risk-based capital, Actual Amount	$ 3,034,883	$ 2,791,474
Tier 1 risk-based capital, Actual Ratio	0.1269	0.1246
Tier 1 risk-based capital, Capital Requirements, Minimum Amount	$ 1,434,560	$ 1,344,036
Tier 1 risk-based capital, Capital Requirements, Minimum Ratio	0.060	0.060
Tier 1 risk-based capital, Capital Requirements, Well Capitalized Amount	$ 1,912,747	$ 1,792,048
Tier 1 risk-based capital, Capital Requirements, Well Capitalized Ratio	0.080	0.080
Tier 1 leverage capital, Actual Amount	$ 3,034,883	$ 2,791,474
Tier 1 leverage capital, Actual Ratio	0.0872	0.0865
Tier 1 leverage capital, Capital Requirements, Minimum Amount	$ 1,392,821	$ 1,291,415
Tier 1 leverage capital, Capital Requirements, Minimum Ratio	0.040	0.040
Tier 1 leverage capital, Capital Requirements, Well Capitalized Amount	$ 1,741,026	$ 1,614,268
Tier 1 leverage capital, Capital Requirements, Well Capitalized Ratio	0.050	0.050
Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital Ratio	0.045	0.045
Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets [Member] | Subsidiaries [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital Ratio	0.045	0.045
Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital Ratio	0.065	0.065
Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets [Member] | Subsidiaries [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital Ratio	0.065	0.065

Regulatory Matters Regulatory M

Regulatory Matters Regulatory Matters - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to parent company	$ 200	$ 20

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	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share Reconciliation [Abstract]
Net income	$ 408,864	$ 220,621	$ 382,723
Less: Preferred stock dividends	7,875	7,875	7,875
Net income available to common shareholders, basic	400,989	212,746	374,848
Net income available to common shareholders, diluted	400,989	212,746	374,848
Less: Earnings applicable to participating securities, basic	2,302	1,272	1,863
Less: Earnings applicable to participating securities, diluted	2,302	1,272	1,863
Earnings applicable to common shareholders	398,687	211,474	372,985
Earnings applicable to common shareholders, diluted	$ 398,687	$ 211,474	$ 372,985
Earnings per common share:
Earnings per common share, Basic (in dollars per share)	$ 4.43	$ 2.35	$ 4.07
Earnings per common share, Diluted (in dollars per share)	$ 4.42	$ 2.35	$ 4.06
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - basic	89,983	89,967	91,559
Stock options and restricted stock (in shares)	223	184	323
Weighted Average Number of Shares Outstanding, Diluted	90,206	90,151	91,882

Earnings Per Common Share (Sche

Earnings Per Common Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, shares	56,829	43,508	73,347

Derivative Financial Instrume_2

Derivative Financial Instruments (Schedule fair value of derivative instruments) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	$ 5,554,015	$ 5,571,385
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	159,117	339,058
Derivative Asset, Fair Value, Amount Offset Against Collateral	6,364	7,748
Asset Derivatives, Fair Value, Less: Cash collateral posted	19,272	33,972
Derivative asset	133,481	297,338
Liability Derivatives, Notional Amount	4,747,534	4,853,650
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	21,784	12,690
Derivative Liability, Fair Value, Amount Offset Against Collateral	6,364	7,748
Liability Derivatives, Fair Value, Less: Cash collateral posted	2,119	4,550
Derivative liability	13,301	392
CME SWAPS MARKETS (CME) [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value, Less: Cash collateral posted	59,900
Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	66,000	80,500
Liability Derivatives, Notional Amount	338,200	338,900
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	25,636	41,774
Derivative Asset, Fair Value, Amount Offset Against Collateral	25,636	41,720
Derivative asset	0	54
Derivative Liability, Fair Value, Gross Liability	8,483	12,352
Derivative Liability, Fair Value, Amount Offset Against Collateral	8,483	12,298
Derivative liability	0	54
Designated as Hedging Instrument [Member] | Interest rate derivatives [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	1,000,000	1,000,000
Derivative Asset, Fair Value, Gross Asset	17,583	40,854
Liability Derivatives, Notional Amount	0	25,000
Derivative Liability, Fair Value, Gross Liability	0	110
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	4,554,015	4,571,385
Asset Derivatives, Fair Value, Positions not subject to master netting agreement	141,534	298,204
Liability Derivatives, Notional Amount	4,747,534	4,828,650
Liability Derivatives, Fair Value, Positions not subject to master netting agreement	21,784	12,580
Not Designated as Hedging Instrument [Member] | Interest rate derivatives [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	4,463,048	4,421,627
Derivative Asset, Fair Value, Gross Asset	141,243	297,085
Liability Derivatives, Notional Amount	4,372,846	4,468,153
Derivative Liability, Fair Value, Gross Liability	21,570	12,203
Not Designated as Hedging Instrument [Member] | Mortgage Banking Derivatives [Member] | RPA-Out [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	14,212	40,771
Derivative Asset, Fair Value, Gross Asset	80	855
Not Designated as Hedging Instrument [Member] | Mortgage Banking Derivatives [Member] | RPA-In [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Notional Amount	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	76,755	108,987
Derivative Asset, Fair Value, Gross Asset	211	264
Liability Derivatives, Notional Amount	374,688	360,497
Derivative Liability, Fair Value, Gross Liability	214	377
Not Designated as Hedging Instrument [Member] | CME SWAPS MARKETS (CME) [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amounts	400,000	100,000
Liability Derivatives, Notional Amount	2,600,000	$ 3,200,000
Interest Rate Lock Commitments [Member]
Derivatives, Fair Value [Line Items]
Other Commitment	$ 1,000

Derivative Financial Instrume_3

Derivative Financial Instruments (Offsetting Derivatives) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative instrument asset, Amount Offset, Total	$ (6,364)	$ (7,748)
Derivative instrument asset, Amount Offset	19,272	33,972
Derivative asset	133,481	297,338
Derivative Liability, Fair Value, Amount Offset Against Collateral	6,364	7,748
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(2,119)	(4,550)
Derivative liability	13,301	392
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(51)	(666)
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	(51)	(720)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(428)	(265)
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	(428)	(319)
Hedge Accounting Positions [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	25,636	41,774
Derivative instrument asset, Amount Offset, Total	(25,636)	(41,720)
Derivative asset	0	54
Derivative Liability, Fair Value, Gross Liability	8,483	12,352
Derivative Liability, Fair Value, Amount Offset Against Collateral	8,483	12,298
Derivative liability	0	54
Interest Rate Derivatives [Member] | Hedge Accounting Positions [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	17,583	40,854
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 110

Derivative Financial Instrume_4

Derivative Financial Instruments Impact of Fair Value on Qualifying Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings		$ 10,008	$ 9,571
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		44,164
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ (10,265)	1,833	5,555
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	10,471
Interest rate derivatives [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	10,369	11,068	8,477
Interest rate derivatives [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	411	8,206	4,241
Interest rate derivatives [Member] | Other Income [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	(10,676)	(6,373)	1,314
Mortgage Banking Derivatives [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	(776)	636	(6)
Other Contract [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	878	(1,696)	$ 1,100
Long-term Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Hedged Liability, Fair Value Hedge	338,811	$ 344,164
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ 38,811

Derivative Financial Instrume_5

Derivative Financial Instruments (Schedule of the changes in the fair value of non-hedge accounting derivatives) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings		$ 10,008	$ 9,571
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ 10,471
Interest Rate Derivatives [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	10,369	11,068	8,477
Mortgage Banking Derivatives [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	(776)	636	(6)
Other Contract [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	878	(1,696)	1,100
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	(10,265)	1,833	5,555
Cash Flow Hedging [Member] | Interest Rate Derivatives [Member] | Operating Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	411	8,206	4,241
Cash Flow Hedging [Member] | Interest Rate Derivatives [Member] | Other Income [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ (10,676)	$ (6,373)	$ 1,314

Derivative Financial Instrume_6

Derivative Financial Instruments (AOCI Related to Cash Flow Hedges) (Narrative) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Remaining unamortized gain (loss) on termination of cash flow hedges	$ 306
Price Risk Derivative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Remaining unamortized gain (loss)	5,800
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Estimate of amount to be reclassified from AOCL	$ (7,200)
Maximum Length of Time Hedged in Cash Flow Hedge	2 years 7 months 6 days
Remaining unamortized gain (loss)	$ 650

Derivative Financial Instrume_7

Derivative Financial Instruments (Counterparty Credit Risk Narrative) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative instrument asset, Amount Offset	$ 19,272	$ 33,972
Credit Derivative, Maximum Exposure, Undiscounted	133,400
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities	400	$ 3,000
Valuation, Cost Approach [Member]
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash	19,700
Valuation, Market Approach [Member]
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	34,100
CME SWAPS MARKETS (CME) [Member]
Derivative [Line Items]
Derivative instrument asset, Amount Offset	$ 59,900

Derivative Financial Instrume_8

Derivative Financial Instruments Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 6,364	$ 7,748
Derivative Asset	133,481	297,338
Derivative Liability, Fair Value, Amount Offset Against Collateral	6,364	7,748
Derivative Liability	13,301	392
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	51	666
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	51	720
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	428	265
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	428	319
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	8,483	12,352
Derivative Asset, Fair Value, Gross Asset	25,636	41,774
Derivative Asset, Fair Value, Amount Offset Against Collateral	25,636	41,720
Derivative Asset	0	54
Derivative Liability, Fair Value, Amount Offset Against Collateral	8,483	12,298
Derivative Liability	$ 0	$ 54

Fair Value Measurements Fair va

Fair Value Measurements Fair value Option, Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 4,694	$ 14,000
Unpaid Principal Balance	4,694	14,012
Difference	(340)	489
loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	$ 5,034	$ 13,511

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unused Commitments to Extend Credit	$ 7,152,331	$ 6,755,563
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	4,400
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount	300
Mortgage Loans in Process of Foreclosure, Amount	7,500
Rabbi Trust [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	1,600
Alternative investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	14,100
Equity Securities, FV-NI	1,900
Equity Securities, FV-NI, Unrealized Gain (Loss)	500
Equity Securities without Readily Determinable Fair Value, Amount	25,900
Fair Value, Nonrecurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	2,800
Fair Value, Nonrecurring [Member] | Alternative investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unused Commitments to Extend Credit	25,800
Alternative investments, written up	$ 5,800

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Assets And Liabilities Measured On Recurring Basis) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	$ 4,234,854	$ 3,326,776
Derivative asset	133,481	297,338
Loans Held-for-sale, Fair Value Disclosure	4,694	14,000
Derivative liability	13,301	392
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	4,234,854	3,326,776
Alternative Investment	27,732	11,112
Assets, Fair Value Disclosure	4,429,813	3,695,757
Derivative liability	21,784	12,690
Fair Value, Recurring [Member] | Derivative instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	159,117	339,058
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	396,966	0
Alternative Investment	1,877	0
Assets, Fair Value Disclosure	402,446	5,016
Derivative liability	141	218
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	187	205
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	3,837,888	3,326,776
Alternative Investment	0	0
Assets, Fair Value Disclosure	4,001,512	3,679,629
Derivative liability	21,643	12,472
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	158,930	338,853
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Alternative Investment	0	0
Assets, Fair Value Disclosure	0	0
Derivative liability	0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Derivative instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Investments held In Rabbi Trust [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	3,416	4,811
Investments held In Rabbi Trust [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	3,416	4,811
Investments held In Rabbi Trust [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Investments held In Rabbi Trust [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Loan Origination Commitments [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	4,694	14,000
Loan Origination Commitments [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
Loan Origination Commitments [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	4,694	14,000
Loan Origination Commitments [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
US Treasury and Government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	396,966
US Treasury and Government | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	396,966
US Treasury and Government | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	396,966
US Treasury and Government | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0
US Treasury and Government | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0
Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	90,384	154,613
Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	90,384	154,613
Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	90,384	154,613
Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	1,593,403	1,457,409
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	1,593,403	1,457,409
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	1,593,403	1,457,409
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Agency commercial mortgage-backed securities (agency CMBS) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	1,232,541	1,117,233
Agency commercial mortgage-backed securities (agency CMBS) [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	1,232,541	1,117,233
Agency commercial mortgage-backed securities (agency CMBS) [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Agency commercial mortgage-backed securities (agency CMBS) [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	1,232,541	1,117,233
Agency commercial mortgage-backed securities (agency CMBS) [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	886,263	508,018
Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	886,263	508,018
Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	886,263	508,018
Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Collateralized loan obligations (CLO) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	21,847	76,383
Collateralized loan obligations (CLO) [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	21,847	76,383
Collateralized loan obligations (CLO) [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Collateralized loan obligations (CLO) [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	21,847	76,383
Collateralized loan obligations (CLO) [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	13,450	13,120
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	13,450	13,120
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	0	0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	13,450	13,120
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value	$ 0	$ 0

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Estimated Fair Values Of Significant Financial Instruments) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reported Value Measurement [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 461,570	$ 263,104
Held to maturity securities	6,198,125	5,567,889
Loans and leases, net	21,970,542	21,281,784
Securities sold under agreements to repurchase and other borrowings	674,896	995,355
FHLB advances	10,997	133,164
Long-term debt	562,931	567,663
Reported Value Measurement [Member] | Fair Value, Nonrecurring [Member] | Deposits other than time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits	28,049,259	24,847,618
Reported Value Measurement [Member] | Fair Value, Nonrecurring [Member] | Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits	1,797,770	2,487,818
Reported Value Measurement [Member] | Fair Value, Nonrecurring [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing assets, Carrying Amount	9,237	13,422
Held to maturity securities	6,198,339	5,568,188
Debt Securities, Held-to-maturity, Fair Value	6,280,936	5,835,364
Loans Held-for-sale, Fair Value Disclosure	4,694	14,000
Mortgage servicing assets, Carrying Amount	9,237	13,422	$ 17,484	$ 21,215
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	461,570	263,104
Debt Securities, Held-to-maturity, Fair Value	6,280,936	5,835,364
Securities sold under agreements to repurchase and other borrowings	676,581	1,000,189
FHLB advances	11,490	139,035
Long-term debt	515,912	538,407
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Nonrecurring [Member] | Deposits other than time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits	28,049,259	24,847,618
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Nonrecurring [Member] | Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits	1,794,829	2,494,601
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, net	21,702,732	21,413,397
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Nonrecurring [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing assets	$ 12,527	$ 14,362

Retirement Benefit Plans (Narra

Retirement Benefit Plans (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 01, 2021
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on assets (as a percent)	5.50%
Shortfall amortization period	7 years
Funded status of plan				$ (0.5)
Employee annual contribution percent of eligible compensation	75.00%
Employer matching contribution, percent of match	100.00%
Employer matching contribution, percent of employees' gross pay	2.00%
Employer matching contribution, additional percent of match	50.00%
Employer additional matching contribution, percent of employees' gross pay	6.00%
Employer additional matching contribution, percent of employees' gross pay, default	3.00%
Compensation expense	$ 13.1	$ 13.8	$ 13.2
Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	64.50%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	63.60%
Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	35.50%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	35.70%
Defined Benefit Plan, Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	0.70%

Retirement Benefit Plans (Chang

Retirement Benefit Plans (Changes in Plan Assets and Funded Status of Pension Plans and Other Postretirement Benefit Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 01, 2021
Change in plan assets:
Beginning balance	$ 266,268
Ending balance	271,846	$ 266,268
Funded status of the plan at year end				$ (500)
Pension Plan [Member]
Change in benefit obligation:
Beginning balance	266,414	241,404
Interest cost	4,663	6,511	$ 7,941
Actuarial (gain) loss	(11,131)	27,376
Benefits paid and administrative expenses	(9,683)	(8,877)
Ending balance	250,263	266,414	241,404
Change in plan assets:
Beginning balance	266,268	239,621
Actual return on plan assets	15,261	35,524
Employer contributions	0	0
Benefits paid and administrative expenses	(9,683)	(8,877)
Ending balance	271,846	266,268	239,621
Funded status of the plan at year end	21,583	(146)
SERP [Member]
Change in benefit obligation:
Beginning balance	2,046	1,935
Interest cost	30	46	65
Actuarial (gain) loss	(77)	194
Benefits paid and administrative expenses	(126)	(129)
Ending balance	1,873	2,046	1,935
Change in plan assets:
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	126	129
Benefits paid and administrative expenses	(126)	(129)
Ending balance	0	0	0
Funded status of the plan at year end	(1,873)	(2,046)
Other Benefits [Member]
Change in benefit obligation:
Beginning balance	1,998	2,399
Interest cost	19	46	85
Actuarial (gain) loss	32	(307)
Benefits paid and administrative expenses	(145)	(140)
Ending balance	1,904	1,998	2,399
Change in plan assets:
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	145	140
Benefits paid and administrative expenses	(145)	(140)
Ending balance	0	0	$ 0
Funded status of the plan at year end	$ (1,904)	$ (1,998)

Retirement Benefit Plans (Weigh

Retirement Benefit Plans (Weighted Average Assumptions used to Determine Benefit Obligations) (Details)	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.65%	2.29%
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.45%	1.91%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.99%	1.40%
Assumed healthcare cost trend rate	6.25%	6.50%

Retirement Benefit Plans (Summa

Retirement Benefit Plans (Summary of Components of Accumulated Other Comprehensive Loss Related to Pensions and Postretirement Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 41,792	$ 57,902
Deferred tax benefit	8,636	12,881
Amounts included in accumulated AOCL, net of tax	33,156	45,021
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	658	773
Deferred tax benefit	136	172
Amounts included in accumulated AOCL, net of tax	522	601
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(620)	(690)
Deferred tax benefit	(128)	(153)
Amounts included in accumulated AOCL, net of tax	$ (492)	$ (537)

Retirement Benefit Plans (Sum_2

Retirement Benefit Plans (Summary of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on benefit obligations	$ 4,663	$ 6,511	$ 7,941
Expected return on plan assets	(14,385)	(13,522)	(11,436)
Recognized net loss	4,102	4,027	5,705
Net periodic benefit cost (benefit)	(5,620)	(2,984)	2,210
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on benefit obligations	30	46	65
Expected return on plan assets	0	0	0
Recognized net loss	38	23	14
Net periodic benefit cost (benefit)	68	69	79
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on benefit obligations	19	46	85
Expected return on plan assets	0	0	0
Recognized net loss	(38)	(74)	(13)
Net periodic benefit cost (benefit)	$ (19)	$ (28)	$ 72

Retirement Benefit Plans (Wei_2

Retirement Benefit Plans (Weighted Average Assumptions used to Determine Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2030
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on assets (as a percent)	5.50%
Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed healthcare cost trend rate				4.40%
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	2.29%	3.07%	4.12%
Expected long-term return on assets (as a percent)	5.50%	5.75%	6.00%
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	1.91%	2.82%	3.95%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	1.40%	2.50%	3.69%
Assumed healthcare cost trend (as a percent)	6.50%	6.50%	6.50%
Assumed healthcare cost trend rate	6.25%	6.50%

Retirement Benefit Plans (Cha_2

Retirement Benefit Plans (Changes in Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss	$ (12,052)	$ 5,262	$ (2,202)
Amounts reclassified from AOCL	(4,102)	(3,976)	(5,706)
Total (gain) loss recognized in OCI	(16,154)	1,286	(7,908)
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss	(12,008)	5,375	(2,263)
Amounts reclassified from AOCL	(4,102)	(4,027)	(5,705)
Total (gain) loss recognized in OCI	(16,110)	1,348	(7,968)
SERP [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss	(77)	194	164
Amounts reclassified from AOCL	(38)	(23)	(14)
Total (gain) loss recognized in OCI	(115)	171	150
Other Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss	33	(307)	(103)
Amounts reclassified from AOCL	38	74	13
Total (gain) loss recognized in OCI	$ 71	$ (233)	$ (90)

Retirement Benefit Plans (Expec

Retirement Benefit Plans (Expected Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2022	$ 9,969
2023	10,345
2024	10,787
2025	11,207
2026	11,587
Thereafter	62,419
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
2022	116
2023	117
2024	128
2025	126
2026	124
Thereafter	581
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2022	270
2023	247
2024	224
2025	201
2026	179
Thereafter	$ 609

Retirement Benefit Plans (Sum_3

Retirement Benefit Plans (Summary of Fair Value of Plan Assets by Level) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 271,846	$ 266,268
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40,923	40,506
Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	230,923	225,762
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Defined Benefit Plan, Common Collective Trust
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	230,923	225,762
Defined Benefit Plan, Common Collective Trust | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Defined Benefit Plan, Common Collective Trust | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	230,923	225,762
Defined Benefit Plan, Common Collective Trust | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Exchange traded funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39,082	39,645
Exchange traded funds [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39,082	39,645
Exchange traded funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Exchange traded funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Defined Benefit Plan, Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,841	861
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,841	861
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

Retirement Benefit Plans (Contr

Retirement Benefit Plans (Contributions and Funding Status of the Fund) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Contributions by Webster Bank	$ 692	$ 998	$ 863

Share-Based Plans (Narrative) (

Share-Based Plans (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	13,400,000
Number of common shares available for grant	4,300,000
Stock appreciation rights granted	0
Unrecognized stock compensation expense	$ 16,000
Unrecognized stock compensation expense, recognition period (in years)	1 year 9 months 18 days
Award vesting percentage	50.00%
Fair value of restricted stock awards	$ 12,500	$ 13,500	$ 12,500
Stock options granted	154,281
Aggregate intrinsic value	$ 3,500
Total intrinsic value of options exercised	$ 9,000	$ 100	$ 2,400
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted	195,749
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares available for grant	100,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted	83,853
Performance Shares [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	0.00%
Performance Shares [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	150.00%
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted	0
Number of options outstanding (in shares)	107,612	410,701
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 23.05	$ 23.35
Non-Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	107,612
Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life (in years)	10
Number of options outstanding (in shares)	0

Share-Based Plans (Summary of S

Share-Based Plans (Summary of Stock-based Compensation Expense Recognized) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit	$ 5,400	$ 2,600	$ 6,100
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 13,700	$ 12,200	$ 12,600

Share-Based Plans (Summary of R

Share-Based Plans (Summary of Restricted Stock and Stock Option Activity) (Detail)	12 Months Ended
	Dec. 31, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock, Granted (in shares)	0
Restricted stock, Outstanding at end of period (in shares)	266,417
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options granted, Number of Shares	154,281
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares	0
Options exercised, Number of Shares	230,418
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Options vested, Weighted-Average Exercise Price (in dollars per share) | $ / shares	$ 0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock, Outstanding at beginning of period (in shares)	547,185
Restricted Stock, Granted (in shares)	195,749
Restricted stock, Vested restricted stock awards (in shares)	186,211
Restricted stock, Forfeited (in shares)	27,439
Restricted stock, Outstanding at end of period (in shares)	529,284
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Restricted stock, at beginning of period, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 46.59
Restricted stock, Granted (in dollars per share) | $ / shares	54.60
Restricted stock, Vested restricted stock awards (in dollars per share) | $ / shares	48.93
Restricted stock, Forfeited (in dollars per share) | $ / shares	46.65
Restricted stock, at end of period, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 48.77
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock, Outstanding at beginning of period (in shares)	250,666
Restricted Stock, Granted (in shares)	83,853
Restricted stock, Vested restricted stock awards (in shares)	65,213
Restricted stock, Forfeited (in shares)	2,889
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Restricted stock, at beginning of period, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 48.77
Restricted stock, Granted (in dollars per share) | $ / shares	54.68
Restricted stock, Vested restricted stock awards (in dollars per share) | $ / shares	51.99
Restricted stock, Forfeited (in dollars per share) | $ / shares	50.45
Restricted stock, at end of period, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 50.03
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, at beginning of period, Number of Shares	410,701
Options granted, Number of Shares	0
Options forfeited, Number of Shares	0
Options exercised, Number of Shares	303,089
Options outstanding, at end of period, Number of Shares	107,612
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Options, at beginning of period, Weighted-average Exercise Price (in dollars per share) | $ / shares	$ 23.35
Options granted, Weighted-Average Exercise Price (in dollars per share) | $ / shares	0
Options forfeited, Weighted-Average Exercise Price (in dollars per share) | $ / shares	0
Options exercised, Weighted-Average Exercise Price (in dollars per share) | $ / shares	23.45
Options, at end of period, Weighted-average Exercise Price (in dollars per share) | $ / shares	$ 23.05

Share-Based Plans (Options Outs

Share-Based Plans (Options Outstanding and Options Exercisable) (Details)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Options Outstanding, Weighted-Average Remaining Contractual Life (years)	1 year 1 month 6 days
Options Exercisable, Weighted-Average Remaining Contractual Life (years)	1 year 1 month 6 days

Segment Reporting (Operating Re

Segment Reporting (Operating Results and Total Assets Reportable Segments) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total Assets	$ 34,915,599	$ 32,590,690
Net interest income (expense)	901,089	891,393	$ 955,127
Noninterest Income	323,372	285,277	285,315
Non-interest expense	745,100	758,946	715,950
Pre-tax, pre-provision net revenue	479,361	417,724	524,492
(Benefit) provision for credit losses	(54,500)	137,750	37,800
Income (loss) before income tax expense	533,861	279,974	486,692
Income tax expense	124,997	59,353	103,969
Net income	408,864	220,621	382,723
Goodwill	538,373	538,373
Operating Segments [Member] | Commercial Banking [Member]
Segment Reporting Information [Line Items]
Total Assets	15,400,886	14,732,792
Net interest income (expense)	587,485	515,027	476,779
Noninterest Income	112,270	90,498	91,184
Non-interest expense	257,461	260,953	252,485
Pre-tax, pre-provision net revenue	442,294	344,572	315,478
(Benefit) provision for credit losses	(51,348)	152,571	29,714
Income (loss) before income tax expense	493,642	192,001	285,764
Income tax expense	124,891	46,848	70,298
Net income	368,751	145,153	215,466
Goodwill	131,000	131,000
Operating Segments [Member] | HSA Bank [Member]
Segment Reporting Information [Line Items]
Total Assets	73,564	80,352
Net interest income (expense)	168,595	162,363	172,685
Noninterest Income	102,814	100,826	97,041
Non-interest expense	135,997	140,637	135,586
Pre-tax, pre-provision net revenue	135,412	122,552	134,140
(Benefit) provision for credit losses	0	0	0
Income (loss) before income tax expense	135,412	122,552	134,140
Income tax expense	36,155	32,721	35,547
Net income	99,257	89,831	98,593
Goodwill	21,813	21,813
Operating Segments [Member] | Community Banking [Member]
Segment Reporting Information [Line Items]
Total Assets	7,663,218	7,726,287
Net interest income (expense)	373,130	331,821	347,377
Noninterest Income	67,155	74,147	77,149
Non-interest expense	296,260	317,215	317,494
Pre-tax, pre-provision net revenue	144,025	88,753	107,032
(Benefit) provision for credit losses	(3,068)	(14,722)	8,086
Income (loss) before income tax expense	147,093	103,475	98,946
Income tax expense	32,361	22,558	20,581
Net income	114,732	80,917	78,365
Goodwill	385,560	385,560
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	11,777,931	10,051,259
Net interest income (expense)	(228,121)	(117,818)	(41,714)
Noninterest Income	41,133	19,806	19,941
Non-interest expense	55,382	40,141	10,385
Pre-tax, pre-provision net revenue	(242,370)	(138,153)	(32,158)
(Benefit) provision for credit losses	(84)	(99)	0
Income (loss) before income tax expense	(242,286)	(138,054)	(32,158)
Income tax expense	(68,410)	(42,774)	(22,457)
Net income	(173,876)	(95,280)	$ (9,701)
Goodwill	$ 0	$ 0

Segment Reporting Segment Repor

Segment Reporting Segment Reporting Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)Segment	Jan. 01, 2021USD ($)	Dec. 31, 2020USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment	3
Goodwill	$ 538,373		$ 538,373
Commercial Banking [Member] | Scenario, Adjustment
Segment Reporting Information [Line Items]
Goodwill		$ 131,000
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 0		$ 0

Revenue from contracts with C_3

Revenue from contracts with Customers Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer, Excluding Assessed Tax	$ 212,406	$ 198,737	$ 208,293
Noninterest Income	323,372	285,277	285,315
Deposit Service Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	162,710	156,032	168,022
Investment Advisory, Management and Administrative Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	39,586	32,916	32,932
Other Non Interest Income [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	10,110	9,789	7,339
Non-Interest Income Within the Scope of Other GAAP Topics [Member]
Noninterest Income	110,966	86,540	77,022
Operating Segments [Member] | Commercial Banking [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	57,806	48,869	49,812
Noninterest Income	112,270	90,498	91,184
Operating Segments [Member] | Commercial Banking [Member] | Deposit Service Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	16,946	14,744	15,694
Operating Segments [Member] | Commercial Banking [Member] | Investment Advisory, Management and Administrative Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	39,623	32,951	32,967
Operating Segments [Member] | Commercial Banking [Member] | Other Non Interest Income [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	1,237	1,174	1,151
Operating Segments [Member] | Commercial Banking [Member] | Non-Interest Income Within the Scope of Other GAAP Topics [Member]
Noninterest Income	54,464	41,629	41,372
Operating Segments [Member] | Community Banking [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	51,451	48,971	61,257
Noninterest Income	67,155	74,147	77,149
Operating Segments [Member] | Community Banking [Member] | Deposit Service Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	50,548	48,489	60,014
Operating Segments [Member] | Community Banking [Member] | Investment Advisory, Management and Administrative Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Operating Segments [Member] | Community Banking [Member] | Other Non Interest Income [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	903	482	1,243
Operating Segments [Member] | Community Banking [Member] | Non-Interest Income Within the Scope of Other GAAP Topics [Member]
Noninterest Income	15,704	25,176	15,892
Operating Segments [Member] | HSA Bank [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	102,814	100,826	97,041
Noninterest Income	102,814	100,826	97,041
Operating Segments [Member] | HSA Bank [Member] | Deposit Service Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	94,844	92,693	92,096
Operating Segments [Member] | HSA Bank [Member] | Investment Advisory, Management and Administrative Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Operating Segments [Member] | HSA Bank [Member] | Other Non Interest Income [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	7,970	8,133	4,945
Operating Segments [Member] | HSA Bank [Member] | Non-Interest Income Within the Scope of Other GAAP Topics [Member]
Noninterest Income	0	0	0
Corporate, Non-Segment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	335	71	183
Noninterest Income	41,133	19,806	19,941
Corporate, Non-Segment [Member] | Deposit Service Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	372	106	218
Corporate, Non-Segment [Member] | Investment Advisory, Management and Administrative Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	(37)	(35)	(35)
Corporate, Non-Segment [Member] | Other Non Interest Income [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Corporate, Non-Segment [Member] | Non-Interest Income Within the Scope of Other GAAP Topics [Member]
Noninterest Income	$ 40,798	$ 19,735	$ 19,758

Commitments and Contingencies_2

Commitments and Contingencies (Outstanding Financial Instruments Contract Amounts Represent Credit Risk) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Unused Commitments to Extend Credit	$ 7,152,331	$ 6,755,563
Standby letters of credit [Member]
Loss Contingencies [Line Items]
Unused Commitments to Extend Credit	224,061	207,201
Letter of Credit [Member]
Loss Contingencies [Line Items]
Unused Commitments to Extend Credit	58,175	30,522
Commitments to extend credit [Member]
Loss Contingencies [Line Items]
Unused Commitments to Extend Credit	$ 6,870,095	$ 6,517,840

Commitments and Contingencies_3

Commitments and Contingencies (Schedule for Unfunded Commitments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Unused Commitments to Extend Credit	$ 7,152,331	$ 6,755,563
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		2,367	$ 2,506
Provision			(139)
Ending balance			2,367
Accounting Standards Update 2016-13 [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	0	9,139	0
Ending balance		0	9,139
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	12,755	2,367
Provision	349	1,249
Ending balance	$ 13,104	$ 12,755	$ 2,367

Parent Company Information (Com

Parent Company Information (Components of Condensed Balance Sheets The Parent Company) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 461,570	$ 263,104	$ 257,895	$ 329,499
Intercompany debt securities		150,000
Other assets	531,469	626,551
Total Assets	34,915,599	32,590,690
Liabilities and shareholders’ equity:
Liabilities	31,477,274	29,356,065
Total liabilities and shareholders' equity	34,915,599	32,590,690
Parent Company [Member]
Assets:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	316,193	302,315	$ 510,940	$ 317,473
Intercompany debt securities	150,000
Investment in subsidiaries	3,526,782	3,340,556
Alternative investments	20,163	8,970
Other assets	3,953	8,122
Total Assets	4,017,091	3,809,963
Liabilities and shareholders’ equity:
Senior notes	485,611	490,343
Junior subordinated debt	77,320	77,320
Accrued interest payable	5,861	5,862
Due to subsidiaries	488	324
Other liabilities	9,486	1,489
Liabilities	578,766	575,338
Shareholders’ equity	3,438,325	3,234,625
Total liabilities and shareholders' equity	$ 4,017,091	$ 3,809,963

Parent Company Information (C_2

Parent Company Information (Components of Condensed Income Statement The Parent Company) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Income:
Total operating income	$ 479,361	$ 417,724	$ 524,492
Operating Expense:
Compensation and benefits	419,989	428,391	395,402
Non-interest expense	77,341	78,228	98,617
Income (loss) before income tax expense	533,861	279,974	486,692
Income tax benefit	(124,997)	(59,353)	(103,969)
Net income	408,864	220,621	382,723
Parent Company [Member]
Operating Income:
Dividend income from bank subsidiary	200,000	20,000	360,000
Interest on securities and deposits	3,444	5,530	10,728
Alternative investments income	13,033	2,467	(256)
Other non-interest income	75	634	382
Total operating income	216,552	28,631	370,854
Operating Expense:
Interest expense on borrowings	16,876	18,684	21,062
Non-interest expense	32,187	16,426	15,527
Total operating expense	49,063	35,110	36,589
Income (loss) before income tax expense	167,489	(6,479)	334,265
Income tax benefit	3,121	4,572	4,671
Equity in undistributed earnings of subsidiaries	238,254	222,528	43,787
Net income	$ 408,864	$ 220,621	$ 382,723

Parent Company Information (C_3

Parent Company Information (Components of Condensed Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other comprehensive income (loss), net of tax:
Derivative instruments	$ (13,848)	$ 29,102	$ 129
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Parent Company [Member]
Condensed Statement of Income Captions [Line Items]
Net income	408,864	220,621	382,723
Other comprehensive income (loss), net of tax:
Derivative instruments	226	2,622	1,479
Other comprehensive (loss) income of subsidiaries	(65,062)	75,706	93,101
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Comprehensive income	$ 344,028	$ 298,949	$ 477,303

Parent Company Information (C_4

Parent Company Information (Components of Condensed Cash Flow The Parent Company) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 408,864	$ 220,621	$ 382,723
Adjustments to reconcile net income to net cash provided by operating activities:
Net cash provided by operating activities	688,592	380,549	303,850
Investing activities:
Alternative investments (capital call), net of distributions	(11,361)	(12,244)	(6,065)
Net cash provided by (used for) investing activities	(2,405,089)	(2,288,609)	(2,549,756)
Financing activities:
Cash dividends paid to common shareholders	(144,807)	(144,965)	(140,783)
Cash dividends paid to preferred shareholders	(7,875)	(7,875)	(7,875)
Exercise of stock options	3,492	240	619
Common stock repurchased and acquired from stock compensation plan activity	0	(76,556)	(13,003)
Net cash (used for) provided by financing activities	1,914,963	1,913,269	2,174,302
Net (decrease) increase in cash and cash equivalents	198,466	5,209	(71,604)
Cash and cash equivalents at beginning of year	263,104	257,895	329,499
Cash and cash equivalents at end of year	461,570	263,104	257,895
Parent Company [Member]
Operating activities:
Net income	408,864	220,621	382,723
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries	(238,254)	(222,528)	(43,787)
Other, net	3,562	29,697	23,681
Net cash provided by operating activities	174,172	27,790	362,617
Investing activities:
Alternative investments (capital call), net of distributions	(6,304)	(3,751)	(1,850)
Investment in subsidiaries	0	0	(296,000)
Net cash provided by (used for) investing activities	(6,304)	(3,751)	(297,850)
Financing activities:
Issuance of long-term debt	0	0	296,358
Cash dividends paid to common shareholders	145,223	144,967	140,783
Cash dividends paid to preferred shareholders	7,875	7,875	7,875
Exercise of stock options	3,492	240	619
Common stock repurchased and acquired from stock compensation plan activity	4,384	80,062	19,619
Net cash (used for) provided by financing activities	(153,990)	(232,664)	128,700
Net (decrease) increase in cash and cash equivalents	13,878	(208,625)	193,467
Cash and cash equivalents at beginning of year	302,315	510,940	317,473
Cash and cash equivalents at end of year	$ 316,193	$ 302,315	$ 510,940