10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

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

For the quarterly period ended March 31, 2021

or

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

Commission File Number 1-9861

M&T BANK CORPORATION

(Exact name of registrant as specified in its charter)

New York	16-0968385
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
One M & T Plaza Buffalo, New York	14203
(Address of principal executive offices)	(Zip Code)

Registrant's telephone number, including area code:

(716) 635-4000

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading Symbols	Name of Each Exchange on Which Registered
Common Stock, $.50 par value	MTB	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    ☒  Yes    ☐  No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).     ☒  Yes    ☐  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company.  See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     ☐  Yes    ☒  No

Number of shares of the registrant's Common Stock, $0.50 par value, outstanding as of the close of business on April 30, 2021: 128,653,702 shares.

M&T BANK CORPORATION

FORM 10-Q

For the Quarterly Period Ended March 31, 2021

Table of Contents of Information Required in Report		Page
Part I.  FINANCIAL INFORMATION
Item 1.	Financial Statements.
	CONSOLIDATED BALANCE SHEET – March 31, 2021 and December 31, 2020	3
	CONSOLIDATED STATEMENT OF INCOME – Three months ended March 31, 2021 and 2020	4
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME – Three months ended March 31, 2021 and 2020	5
	CONSOLIDATED STATEMENT OF CASH FLOWS – Three months ended March 31, 2021 and 2020	6
	CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY – Three months ended March 31, 2021 and 2020	7
	NOTES TO FINANCIAL STATEMENTS	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	47
Item 3.	Quantitative and Qualitative Disclosures About Market Risk.	80
Item 4.	Controls and Procedures.	80
Part II. OTHER INFORMATION
Item 1.	Legal Proceedings	80
Item 1A.	Risk Factors.	80
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	84
Item 3.	Defaults Upon Senior Securities.	84
Item 4.	Mine Safety Disclosures.	84
Item 5.	Other Information.	84
Item 6.	Exhibits.	85
SIGNATURES		86

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEET (Unaudited)

	March 31,			December 31,
(Dollars in thousands, except per share)	2021			2020
Assets
Cash and due from banks	$	1,258,989		$	1,552,743
Interest-bearing deposits at banks		31,407,227			23,663,810
Federal funds sold		1,000			—
Trading account		687,359			1,068,581
Investment securities (includes pledged securities that can be sold or repledged of    $89,522 at March 31, 2021; $105,136 at December 31, 2020)
Available for sale (cost: $4,194,886 at March 31, 2021;    $4,621,027 at December 31, 2020		4,364,437			4,822,606
Held to maturity (fair value: $1,850,210 at March 31, 2021;    $1,842,281 at December 31, 2020)		1,778,135			1,748,989
Equity and other securities (cost: $455,286 at March 31, 2021;    $449,008 at December 31, 2020)		468,095			474,102
Total investment securities		6,610,667			7,045,697
Loans and leases		99,691,141			98,875,788
Unearned discount		(392,061	)		(339,921	)
Loans and leases, net of unearned discount		99,299,080			98,535,867
Allowance for credit losses		(1,636,206	)		(1,736,387	)
Loans and leases, net		97,662,874			96,799,480
Premises and equipment		1,148,941			1,161,558
Goodwill		4,593,112			4,593,112
Core deposit and other intangible assets		11,427			14,165
Accrued interest and other assets		7,099,464			6,701,959
Total assets	$	150,481,060		$	142,601,105
Liabilities
Noninterest-bearing deposits	$	53,641,419		$	47,572,884
Savings and interest-checking deposits		70,679,036			67,680,840
Time deposits		3,514,219			3,899,910
Deposits at Cayman Islands office		641,691			652,104
Total deposits		128,476,365			119,805,738
Short-term borrowings		58,957			59,482
Accrued interest and other liabilities		2,000,727			2,166,409
Long-term borrowings		3,498,503			4,382,193
Total liabilities		134,034,552			126,413,822
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized;    Issued and outstanding: Liquidation preference of $1,000 per share: 350,000    shares at March 31, 2021 and December 31, 2020; Liquidation preference of    $10,000 per share: 90,000 shares at March 31, 2021 and December 31, 2020		1,250,000			1,250,000
Common stock, $.50 par, 250,000,000 shares authorized,    159,741,898 shares issued at March 31, 2021 and December 31, 2020		79,871			79,871
Common stock issuable, 15,492 shares at March 31, 2021;    18,113 shares at December 31, 2020		1,165			1,344
Additional paid-in capital		6,611,150			6,617,404
Retained earnings		13,731,893			13,444,428
Accumulated other comprehensive income (loss), net		(138,478	)		(63,032	)
Treasury stock — common, at cost — 31,098,951 shares at March 31, 2021;    31,426,742 shares at December 31, 2020		(5,089,093	)		(5,142,732	)
Total shareholders’ equity		16,446,508			16,187,283
Total liabilities and shareholders’ equity	$	150,481,060		$	142,601,105

See accompanying notes to financial statements.

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF INCOME (Unaudited)

	Three Months Ended March 31
(In thousands, except per share)	2021			2020
Interest income
Loans and leases, including fees	$	972,582		$	1,046,821
Investment securities
Fully taxable		37,071			50,110
Exempt from federal taxes		55			75
Deposits at banks		6,874			18,966
Other		380			4,447
Total interest income		1,016,962			1,120,419
Interest expense
Savings and interest-checking deposits		11,504			78,002
Time deposits		7,010			21,872
Deposits at Cayman Islands office		185			3,419
Short-term borrowings		2			23
Long-term borrowings		16,866			40,298
Total interest expense		35,567			143,614
Net interest income		981,395			976,805
Provision for credit losses		(25,000	)		250,000
Net interest income after provision for credit losses		1,006,395			726,805
Other income
Mortgage banking revenues		138,754			127,909
Service charges on deposit accounts		92,777			106,161
Trust income		156,022			148,751
Brokerage services income		13,113			13,129
Trading account and foreign exchange gains		6,284			21,016
Loss on bank investment securities		(12,282	)		(20,782	)
Other revenues from operations		110,930			133,176
Total other income		505,598			529,360
Other expense
Salaries and employee benefits		541,078			536,843
Equipment and net occupancy		82,471			79,640
Outside data processing and software		65,751			64,410
FDIC assessments		14,188			12,271
Advertising and marketing		14,628			22,375
Printing, postage and supplies		9,317			10,852
Amortization of core deposit and other intangible assets		2,738			3,913
Other costs of operations		189,273			176,112
Total other expense		919,444			906,416
Income before taxes		592,549			349,749
Income taxes		145,300			80,927
Net income	$	447,249		$	268,822
Net income available to common shareholders
Basic	$	428,091		$	250,701
Diluted		428,093			250,701
Net income per common share
Basic	$	3.33		$	1.93
Diluted		3.33			1.93
Average common shares outstanding
Basic		128,537			129,696
Diluted		128,669			129,755

See accompanying notes to financial statements.

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited)

	Three Months Ended March 31
(In thousands)	2021			2020
Net income	$	447,249		$	268,822
Other comprehensive income (loss), net of tax and    reclassification adjustments:
Net unrealized gains (losses) on investment securities		(22,406	)		97,448
Cash flow hedges adjustments		(66,777	)		312,720
Foreign currency translation adjustments		548			(2,943	)
Defined benefit plans liability adjustments		13,189			9,288
Total other comprehensive income (loss)		(75,446	)		416,513
Total comprehensive income	$	371,803		$	685,335

See accompanying notes to financial statements.

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)

	Three Months Ended March 31
(In thousands)	2021			2020
Cash flows from operating activities
Net income	$	447,249		$	268,822
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses		(25,000	)		250,000
Depreciation and amortization of premises and equipment		57,116			54,756
Amortization of capitalized servicing rights		19,951			18,991
Amortization of core deposit and other intangible assets		2,738			3,913
Provision for deferred income taxes		39,329			(36,243	)
Asset write-downs		1,217			2,990
Net gain on sales of assets		(2,106	)		(3,933	)
Net change in accrued interest receivable, payable		(36,893	)		(13,863	)
Net change in other accrued income and expense		(27,301	)		(73,363	)
Net change in loans originated for sale		158,878			(158,193	)
Net change in trading account assets and liabilities		359,559			(708,319	)
Net cash provided (used) by operating activities		994,737			(394,442	)
Cash flows from investing activities
Proceeds from sales of investment securities
Equity and other securities		2,526			2,536
Proceeds from maturities of investment securities
Available for sale		422,171			303,994
Held to maturity		171,644			359,615
Purchases of investment securities
Available for sale		(1,002	)		(2,951	)
Held to maturity		(201,234	)		(5,996	)
Equity and other securities		(8,801	)		(17,728	)
Net increase in loans and leases		(988,654	)		(3,105,967	)
Net increase in interest-bearing deposits at banks		(7,743,417	)		(1,706,153	)
Capital expenditures, net		(31,016	)		(51,547	)
Net increase in loan servicing advances		(374,614	)		(48,866	)
Other, net		(179,350	)		420,700
Net cash used by investing activities		(8,931,747	)		(3,852,363	)
Cash flows from financing activities
Net increase in deposits		8,670,627			5,413,829
Net decrease in short-term borrowings		(525	)		(3,183	)
Payments on long-term borrowings		(852,945	)		(753,123	)
Purchases of treasury stock		—			(373,750	)
Dividends paid — common		(142,044	)		(143,170	)
Dividends paid — preferred		(21,288	)		(21,344	)
Other, net		(9,569	)		(10,567	)
Net cash provided by financing activities		7,644,256			4,108,692
Net decrease in cash, cash equivalents and restricted cash		(292,754	)		(138,113	)
Cash, cash equivalents and restricted cash at beginning of period		1,552,743			1,436,305
Cash, cash equivalents and restricted cash at end of period	$	1,259,989		$	1,298,192
Supplemental disclosure of cash flow information
Interest received during the period	$	971,142		$	1,159,094
Interest paid during the period		55,378			158,861
Income taxes paid during the period		24,220			44,660
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	$	2,301		$	17,295
Additions to right-of-use assets under operating leases	$	13,020		$	17,421

See accompanying notes to financial statements.

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY (Unaudited)

														Accumulated
														Other
					Common			Additional						Comprehensive
	Preferred		Common		Stock			Paid-in			Retained			Income			Treasury
Dollars in thousands, except per share	Stock		Stock		Issuable			Capital			Earnings			(Loss), Net			Stock			Total
2021
Balance — January 1, 2021	$	1,250,000	$	79,871	$	1,344		$	6,617,404		$	13,444,428		$	(63,032	)	$	(5,142,732	)	$	16,187,283
Total comprehensive income		—		—		—			—			447,249			(75,446	)		—			371,803
Preferred stock cash dividends (a)		—		—		—			—			(17,050	)		—			—			(17,050	)
Stock-based compensation transactions, net		—		—		(179	)		(6,254	)		(208	)		—			53,639			46,998
Common stock cash dividends —    $1.10 per share		—		—		—			—			(142,526	)		—			—			(142,526	)
Balance — March 31, 2021	$	1,250,000	$	79,871	$	1,165		$	6,611,150		$	13,731,893		$	(138,478	)	$	(5,089,093	)	$	16,446,508
2020
Balance — January 1, 2020	$	1,250,000	$	79,871	$	1,566		$	6,593,539		$	12,820,916		$	(206,680	)	$	(4,822,563	)	$	15,716,649
Adoption of new accounting standard for credit    losses		—		—		—			—			(91,925	)		—			—			(91,925	)
Total comprehensive income		—		—		—			—			268,822			416,513			—			685,335
Preferred stock cash dividends (a)		—		—		—			—			(17,078	)		—			—			(17,078	)
Purchases of treasury stock		—		—		—			—			—			—			(373,750	)		(373,750	)
Stock-based compensation transactions, net		—		—		(274	)		(5,132	)		(102	)		—			45,314			39,806
Common stock cash dividends —    $1.10 per share		—		—		—			—			(143,243	)		—			—			(143,243	)
Balance — March 31, 2020	$	1,250,000	$	79,871	$	1,292		$	6,588,407		$	12,837,390		$	209,833		$	(5,150,999	)	$	15,815,794

(a) For the three-months ended March 31, 2021, dividends per preferred share were: Preferred Series E - $16.125; Preferred Series F - $128.125; and Preferred Series G - $125.00.  Dividends per preferred share for the three-months ended March 31, 2020 were:  Preferred Series E - $16.125; Preferred Series F - $128.125; and Preferred Series G - $125.694.

See accompanying notes to financial statements.

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NOTES TO FINANCIAL STATEMENTS

1. Significant accounting policies

The consolidated interim financial statements of M&T Bank Corporation (“M&T”) and subsidiaries (“the Company”) were compiled in accordance with generally accepted accounting principles (“GAAP”) using the accounting policies set forth in note 1 of Notes to Financial Statements included in Form 10-K for the year ended December 31, 2020 (“2020 Annual Report”). The financial statements contain all adjustments which are, in the opinion of management, necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the interim periods presented.

2. Acquisition

On February 22, 2021, M&T announced that it had entered into a definitive agreement with People’s United Financial, Inc.  ("People’s United"), headquartered in Bridgeport, Connecticut, under which People’s United will be acquired by M&T in an all-stock transaction. Pursuant to the terms of the agreement, People’s United shareholders will receive consideration valued at .118 of an M&T share in the form of M&T common stock. People’s United outstanding preferred stock will be converted into a new series of M&T preferred stock upon completion of the acquisition. The transaction is valued at approximately $7.7 billion (with the price based on M&T’s closing price of $151.61 per share as of March 31, 2021).  

The merger has been unanimously approved by the boards of directors of each company. The merger is expected to close in the fourth quarter of 2021, subject to the satisfaction of customary closing conditions, including the receipt of regulatory approvals and approval by the shareholders of M&T and People’s United. As of March 31, 2021, People’s United disclosed that it had total assets of $64.2 billion, including $42.8 billion of loans, $56.6 billion of liabilities, including $53.5 billion of deposits, and $7.6 billion of stockholders’ equity.

In connection with the acquisition, the Company incurred merger-related expenses consisting predominantly of professional services for investment banking, legal and other services associated with the proposed transaction that totaled approximately $10 million in the first quarter of 2021.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Investment securities

The amortized cost and estimated fair value of investment securities were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
March 31, 2021
Investment securities available for sale:
U.S. Treasury and federal agencies	$	6,851	$	163	$	1	$	7,013
Mortgage-backed securities:
Government issued or guaranteed		4,051,580		174,154		645		4,225,089
Privately issued		16		—		—		16
Other debt securities		136,439		2,295		6,415		132,319
		4,194,886		176,612		7,061		4,364,437
Investment securities held to maturity:
U.S. Treasury and federal agencies		3,000		—		—		3,000
Obligations of states and political subdivisions		851		4		—		855
Mortgage-backed securities:
Government issued or guaranteed		1,697,992		79,650		1,623		1,776,019
Privately issued		73,496		11,288		17,244		67,540
Other debt securities		2,796		—		—		2,796
		1,778,135		90,942		18,867		1,850,210
Total debt securities	$	5,973,021	$	267,554	$	25,928	$	6,214,647
Equity and other securities:
Readily marketable equity — at fair value	$	68,983	$	13,012	$	203	$	81,792
Other — at cost		386,303		—		—		386,303
Total equity and other securities	$	455,286	$	13,012	$	203	$	468,095
December 31, 2020
Investment securities available for sale:
U.S. Treasury and federal agencies	$	9,154	$	198	$	14	$	9,338
Mortgage-backed securities:
Government issued or guaranteed		4,475,406		208,787		755		4,683,438
Privately issued		16		—		—		16
Other debt securities		136,451		1,664		8,301		129,814
		4,621,027		210,649		9,070		4,822,606
Investment securities held to maturity:
U.S. Treasury and federal agencies		2,999		—		—		2,999
Obligations of states and political subdivisions		1,531		9		—		1,540
Mortgage-backed securities:
Government issued or guaranteed		1,664,443		100,176		11		1,764,608
Privately issued		77,155		11,056		17,938		70,273
Other debt securities		2,861		—		—		2,861
		1,748,989		111,241		17,949		1,842,281
Total debt securities	$	6,370,016	$	321,890	$	27,019	$	6,664,887
Equity and other securities:
Readily marketable equity — at fair value	$	67,891	$	25,094	$	—	$	92,985
Other — at cost		381,117		—		—		381,117
Total equity and other securities	$	449,008	$	25,094	$	—	$	474,102

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Investment securities, continued

There were no significant gross realized gains or losses from sales of investment securities for the quarters ended March 31, 2021 and 2020.  Unrealized losses on equity securities were $12 million and $21 million during the three months ended March 31, 2021 and 2020, respectively.  

At March 31, 2021, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:

	Amortized Cost		Estimated Fair Value
	(In thousands)
Debt securities available for sale:
Due in one year or less	$	2,482		2,501
Due after one year through five years		12,030		12,439
Due after five years through ten years		98,778		99,066
Due after ten years		30,000		25,326
		143,290		139,332
Mortgage-backed securities available for sale		4,051,596		4,225,105
	$	4,194,886		4,364,437
Debt securities held to maturity:
Due in one year or less	$	3,676		3,678
Due after one year through five years		175		177
Due after ten years		2,796		2,796
		6,647		6,651
Mortgage-backed securities held to maturity		1,771,488		1,843,559
	$	1,778,135		1,850,210

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

 3. Investment securities, continued

A summary of investment securities that as of March 31, 2021 and December 31, 2020 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:

	Less Than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
March 31, 2021
Investment securities available for sale:
U.S. Treasury and federal agencies	$	299		(1	)		—		—
Mortgage-backed securities:
Government issued or guaranteed		1,825		(8	)		25,724		(637	)
Other debt securities		2,401		(23	)		65,209		(6,392	)
		4,525		(32	)		90,933		(7,029	)
Investment securities held to maturity:
Mortgage-backed securities:
Government issued or guaranteed		199,549		(1,609	)		1,686		(14	)
Privately issued		—		—			51,443		(17,244	)
		199,549		(1,609	)		53,129		(17,258	)
Total	$	204,074		(1,641	)		144,062		(24,287	)
December 31, 2020
Investment securities available for sale:
U.S. Treasury and federal agencies	$	985		(14	)		—		—
Mortgage-backed securities:
Government issued or guaranteed		18,687		(356	)		16,556		(399	)
Other debt securities		16,055		(181	)		63,462		(8,120	)
		35,727		(551	)		80,018		(8,519	)
Investment securities held to maturity:
Mortgage-backed securities:
Government issued or guaranteed		2,039		(11	)		—		—
Privately issued		—		—			52,418		(17,938	)
		2,039		(11	)		52,418		(17,938	)
Total	$	37,766		(562	)		132,436		(26,457	)

The Company owned 281 individual debt securities with aggregate gross unrealized losses of $26 million at March 31, 2021. Based on a review of each of the securities in the investment securities portfolio at March 31, 2021, the Company concluded that it expected to recover the amortized cost basis of its investment.  As of March 31, 2021, the Company does not intend to sell nor is it anticipated that it would be required to sell any of its impaired investment securities at a loss.  At March 31, 2021, the Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of the $386 million of cost method equity securities.

The Company estimated no material allowance for credit losses for its investment securities classified as held-to-maturity at March 31, 2021 or December 31, 2020, as the substantial majority of such investment securities are obligations backed by the U.S. government or its agencies.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses

A summary of current, past due and nonaccrual loans as of  March 31, 2021 and December 31, 2020 follows:

	Current		30-89 Days Past Due		Accruing Loans Past Due 90 Days or More		Nonaccrual		Total
	(In thousands)
March 31, 2021
Commercial, financial, leasing, etc.	$	27,327,644		182,686		5,791		295,069	$	27,811,190
Real estate:
Commercial		26,369,232		175,904		26,996		824,079		27,396,211
Residential builder and developer		1,269,858		7,909		—		1,224		1,278,991
Other commercial construction		8,580,462		37,986		6,099		126,225		8,750,772
Residential		14,198,898		191,860		1,041,873		385,508		15,818,139
Residential — limited documentation		1,372,339		16,136		—		143,069		1,531,544
Consumer:
Home equity lines and loans		3,720,689		15,926		—		79,188		3,815,803
Recreational finance		7,228,228		26,821		—		27,218		7,282,267
Automobile		4,178,258		28,970		—		38,219		4,245,447
Other		1,319,323		8,292		3,794		37,307		1,368,716
Total	$	95,564,931		692,490		1,084,553		1,957,106	$	99,299,080

December 31, 2020
Commercial, financial, leasing, etc.	$	27,196,862	60,822	10,053	306,827	$	27,574,564
Real estate:
Commercial		26,688,515	168,917	47,014	775,894		27,680,340
Residential builder and developer		1,246,095	1,693	856	1,094		1,249,738
Other commercial construction		8,523,591	66,365	3,816	114,039		8,707,811
Residential		13,764,836	200,406	792,888	365,729		15,123,859
Residential — limited documentation		1,462,277	19,687	—	147,170		1,629,134
Consumer:
Home equity lines and loans		3,881,885	24,329	—	79,392		3,985,606
Recreational finance		7,002,643	47,161	—	25,519		7,075,323
Automobile		4,007,349	55,498	—	39,404		4,102,251
Other		1,346,868	17,561	4,581	38,231		1,407,241
Total	$	95,120,921	662,439	859,208	1,893,299	$	98,535,867

- 12 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

A summary of outstanding loan balances for which COVID-19 related modifications were granted as of March 31, 2021 is presented below. These loans meet the criteria described in note 1 of Notes to Financial Statements in the 2020 Annual Report and, accordingly, are not considered past due or otherwise in default of loan terms as of the date presented. Substantially all of the modifications noted below expire during 2021.

	COVID-19 Related Modifications
March 31, 2021	Payment Deferrals(1)			Other Forbearances(2)		Total
	(In thousands)
Commercial, financial, leasing, etc.	$	60,819		$	156,491	$	217,310
Real estate:
Commercial		507,491			361,664		869,155
Other commercial construction		72,452			100,901		173,353
Residential		3,017,626	(3)		—		3,017,626
Residential — limited    documentation		296,987			—		296,987
Consumer:
Home equity lines and loans		18,529			—		18,529
Recreational finance		14,161			—		14,161
Automobile		24,882			—		24,882
Other		994			—		994
Total	$	4,013,941		$	619,056	$	4,632,997

(1) Represents accruing loans at March 31, 2021 for which a COVID-19 related payment deferral (including maturity extensions) has been granted.

(2) Consists predominantly of accruing loans for which a COVID-19 related covenant waiver has been granted.

(3) Includes $2.4 billion of government-guaranteed loans.

One-to-four family residential mortgage loans held for sale were $773 million and $777 million at March 31, 2021 and December 31, 2020, respectively.  Commercial real estate loans held for sale were $99 million at March 31, 2021 and $278 million at December 31, 2020.

Credit quality indicators

The Company utilizes a loan grading system to differentiate risk amongst its commercial loans and commercial real estate loans.  Loans with a lower expectation of default are assigned one of ten possible “pass” loan grades and are generally ascribed lower loss factors when determining the allowance for credit losses. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed a higher loss factor when determining the allowance for credit losses. Criticized loans may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more.

- 13 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

Loan officers in different geographic locations with the support of the Company’s credit department personnel review and reassign loan grades based on their detailed knowledge of individual borrowers and their judgment of the impact on such borrowers resulting from changing conditions in their respective regions. Factors considered in assigning loan grades include borrower-specific information related to expected future cash flows and operating results, collateral values, geographic location, financial condition and performance, payment status, and other information. At least annually, updated financial information is obtained from commercial borrowers associated with pass grade loans and additional analysis is performed.  On a quarterly basis, the Company’s centralized credit department reviews all criticized commercial loans and commercial real estate loans greater than $1 million to determine the appropriateness of the assigned loan grade, including whether the loan should be reported as accruing or nonaccruing.

The following table summarizes the loan grades applied at March 31, 2021 to the various classes of the Company’s commercial loans and commercial real estate loans by origination year.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Commercial, financial, leasing, etc.:
Loan grades:
Pass	$	3,124,732		5,923,267		2,096,560		1,384,745		690,770		1,959,774		10,864,179		18,253	$	26,062,280
Criticized accrual		182,972		335,409		107,197		109,828		54,978		112,406		536,752		14,299		1,453,841
Criticized nonaccrual		684		6,652		30,437		58,718		16,522		68,214		105,392		8,450		295,069
Total commercial,    financial, leasing, etc.	$	3,308,388		6,265,328		2,234,194		1,553,291		762,270		2,140,394		11,506,323		41,002	$	27,811,190
Real estate:
Commercial:
Loan grades:
Pass	$	631,465		3,077,590		4,586,114		3,077,605		2,507,906		7,513,879		850,376		—	$	22,244,935
Criticized accrual		720		584,844		556,339		833,519		269,903		2,014,016		67,856		—		4,327,197
Criticized nonaccrual		—		33,509		123,364		46,519		141,610		469,332		9,745		—		824,079
Total commercial real    estate	$	632,185		3,695,943		5,265,817		3,957,643		2,919,419		9,997,227		927,977		—	$	27,396,211
Residential builder and developer:
Loan grades:
Pass	$	157,050		429,172		194,524		83,260		8,844		19,738		253,319		—	$	1,145,907
Criticized accrual		—		2,550		107,946		15,097		630		1,847		3,790		—		131,860
Criticized nonaccrual		—		—		518		—		—		706		—		—		1,224
Total residential builder    and developer	$	157,050		431,722		302,988		98,357		9,474		22,291		257,109		—	$	1,278,991
Other commercial construction:
Loan grades:
Pass	$	169,597		1,346,451		3,120,357		1,603,206		649,578		484,087		71,183		—	$	7,444,459
Criticized accrual		1,130		22,703		167,294		548,509		301,956		138,496		—		—		1,180,088
Criticized nonaccrual		—		336		78,901		13,435		4,130		24,032		5,391		—		126,225
Total other commercial    construction	$	170,727		1,369,490		3,366,552		2,165,150		955,664		646,615		76,574		—	$	8,750,772

Increases to criticized loans as compared with December 31, 2020 were predominantly attributable to effects of the COVID-19 pandemic and the related re-grading of loans.

- 14 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

The Company considers repayment performance a significant indicator of credit quality for its residential real estate loan and consumer loan portfolios.  A summary of loans in accrual and nonaccrual status at March 31, 2021 for the various classes of the Company’s residential real estate loans and consumer loans by origination year follows.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Residential:
Current	$	1,125,233		1,889,481		1,331,314		599,352		1,496,417		7,701,525		55,576		—	$	14,198,898
30-89 days past due		2,270		10,190		5,363		5,116		20,138		148,539		244		—		191,860
Accruing loans past due 90             days or more		—		97,784		28,810		40,613		248,186		626,480		—		—		1,041,873
Nonaccrual		508		19,705		12,889		3,571		5,003		343,638		194		—		385,508
Total residential	$	1,128,011		2,017,160		1,378,376		648,652		1,769,744		8,820,182		56,014		—	$	15,818,139
Residential - limited documentation:
Current	$	—		—		—		—		—		1,372,339		—		—	$	1,372,339
30-89 days past due		—		—		—		—		—		16,136		—		—		16,136
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		143,069		—		—		143,069
Total residential - limited    documentation	$	—		—		—		—		—		1,531,544		—		—	$	1,531,544
Consumer:
Home equity lines and loans:
Current	$	74		953		3,777		2,316		2,281		50,886		2,458,179		1,202,223	$	3,720,689
30-89 days past due		—		—		23		—		18		917		258		14,710		15,926
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		6,263		5,714		67,211		79,188
Total home equity lines and loans	$	74		953		3,800		2,316		2,299		58,066		2,464,151		1,284,144	$	3,815,803

- 15 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Recreational finance:
Current	$	678,012		2,637,664		1,631,536		841,575		588,596		850,845		—		—	$	7,228,228
30-89 days past due		459		5,467		5,584		4,372		4,709		6,230		—		—		26,821
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		147		2,217		4,494		4,741		4,697		10,922		—		—		27,218
Total recreational finance	$	678,618		2,645,348		1,641,614		850,688		598,002		867,997		—		—	$	7,282,267
Automobile:
Current	$	569,198		1,499,937		996,107		553,269		377,492		182,255		—		—	$	4,178,258
30-89 days past due		632		4,010		7,384		6,231		5,963		4,750		—		—		28,970
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		491		2,248		7,925		9,686		9,595		8,274		—		—		38,219
Total automobile	$	570,321		1,506,195		1,011,416		569,186		393,050		195,279		—		—	$	4,245,447
Other:
Current	$	42,958		145,146		121,021		45,113		27,818		30,171		905,388		1,708	$	1,319,323
30-89 days past due		1,224		455		630		256		114		533		4,823		257		8,292
Accruing loans past due 90             days or more		—		—		—		—		—		336		3,458		—		3,794
Nonaccrual		838		210		562		294		183		215		34,832		173		37,307
Total other	$	45,020		145,811		122,213		45,663		28,115		31,255		948,501		2,138	$	1,368,716
Total loans and leases at    March 31, 2021	$	6,690,394		18,077,950		15,326,970		9,890,946		7,438,037		24,310,850		16,236,649		1,327,284	$	99,299,080

- 16 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

The following table summarizes the loan grades applied at December 31, 2020 to the various classes of the Company’s commercial loans and commercial real estate loans by origination year.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Commercial, financial, leasing, etc.:
Loan grades:
Pass	$	7,732,728		2,277,233		1,505,486		930,834		719,796		1,387,695		11,352,416		21,286	$	25,927,474
Criticized accrual		388,326		84,358		113,940		41,587		39,930		73,401		584,751		13,970		1,340,263
Criticized nonaccrual		7,720		27,309		56,227		16,808		19,681		45,471		125,893		7,718		306,827
Total commercial,    financial, leasing, etc.	$	8,128,774		2,388,900		1,675,653		989,229		779,407		1,506,567		12,063,060		42,974	$	27,574,564
Real estate:
Commercial:
Loan grades:
Pass	$	3,353,450		4,681,834		3,299,095		2,628,061		2,746,165		5,698,834		875,348		—	$	23,282,787
Criticized accrual		526,037		400,154		579,507		290,885		568,144		1,212,672		44,260		—		3,621,659
Criticized nonaccrual		26,876		121,899		47,144		99,293		197,319		248,949		34,414		—		775,894
Total commercial real    estate	$	3,906,363		5,203,887		3,925,746		3,018,239		3,511,628		7,160,455		954,022		—	$	27,680,340
Residential builder and developer:
Loan grades:
Pass	$	506,295		223,880		109,453		15,048		10,976		11,320		236,943		—	$	1,113,915
Criticized accrual		3,690		106,847		14,836		3,421		—		1,885		4,050		—		134,729
Criticized nonaccrual		—		518		—		—		—		576		—		—		1,094
Total residential builder    and developer	$	509,985		331,245		124,289		18,469		10,976		13,781		240,993		—	$	1,249,738
Other commercial construction:
Loan grades:
Pass	$	1,050,258		2,998,921		2,048,063		945,339		233,127		294,030		74,611		—	$	7,644,349
Criticized accrual		37,192		148,492		381,091		225,949		144,665		12,034		—		—		949,423
Criticized nonaccrual		335		65,592		13,522		4,213		12,097		12,873		5,407		—		114,039
Total other commercial    construction	$	1,087,785		3,213,005		2,442,676		1,175,501		389,889		318,937		80,018		—	$	8,707,811

- 17 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

A summary of loans in accrual and nonaccrual status at December 31, 2020 for the various classes of the Company’s residential real estate loans and consumer loans by origination year follows.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Residential:
Current	$	2,722,862		1,416,259		618,736		1,318,094		718,235		6,898,756		71,894		—	$	13,764,836
30-89 days past due		13,496		7,781		7,258		13,477		7,947		150,447		—		—		200,406
Accruing loans past due 90             days or more		579		15,234		38,145		212,818		45,804		480,308		—		—		792,888
Nonaccrual		3,133		14,439		5,183		6,408		2,900		333,466		200		—		365,729
Total residential	$	2,740,070		1,453,713		669,322		1,550,797		774,886		7,862,977		72,094		—	$	15,123,859
Residential - limited documentation:
Current	$	—		—		—		—		—		1,462,277		—		—	$	1,462,277
30-89 days past due		—		—		—		—		—		19,687		—		—		19,687
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		147,170		—		—		147,170
Total residential - limited    documentation	$	—		—		—		—		—		1,629,134		—		—	$	1,629,134
Consumer:
Home equity lines and loans:
Current	$	773		3,983		1,591		2,016		162		51,554		2,569,621		1,252,185	$	3,881,885
30-89 days past due		—		—		—		—		—		1,148		939		22,242		24,329
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		6,148		5,752		67,492		79,392
Total home equity lines and loans	$	773		3,983		1,591		2,016		162		58,850		2,576,312		1,341,919	$	3,985,606

- 18 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Recreational finance:
Current	$	2,796,359		1,751,766		907,595		630,151		352,414		564,358		—		—	$	7,002,643
30-89 days past due		9,548		11,255		8,519		6,638		2,938		8,263		—		—		47,161
Accruing loans past                due 90 days or                more		—		—		—		—		—		—		—		—		—
Nonaccrual		1,854		3,883		4,072		4,194		2,733		8,783		—		—		25,519
Total recreational finance	$	2,807,761		1,766,904		920,186		640,983		358,085		581,404		—		—	$	7,075,323
Automobile:
Current	$	1,595,636		1,106,782		629,338		440,604		171,017		63,972		—		—	$	4,007,349
30-89 days past due		6,461		14,140		12,542		12,899		6,373		3,083		—		—		55,498
Accruing loans past                due 90 days or                more		—		—		—		—		—		—		—		—		—
Nonaccrual		1,615		7,144		10,788		10,061		5,991		3,805		—		—		39,404
Total automobile	$	1,603,712		1,128,066		652,668		463,564		183,381		70,860		—		—	$	4,102,251
Other:
Current	$	160,424		137,617		53,702		32,556		4,526		28,970		927,217		1,856	$	1,346,868
30-89 days past due		1,879		1,130		577		2,301		42		557		10,594		481		17,561
Accruing loans past                due 90 days or                more		—		—		—		—		—		374		4,207		—		4,581
Nonaccrual		1,493		492		339		183		31		501		35,044		148		38,231
Total other	$	163,796		139,239		54,618		35,040		4,599		30,402		977,062		2,485	$	1,407,241
Total loans and leases at    December 31, 2020	$	20,949,019		15,628,942		10,466,749		7,893,838		6,013,013		19,233,367		16,963,561		1,387,378	$	98,535,867

Allowance for credit losses

For purposes of determining the level of the allowance for credit losses, the Company evaluates its loan and lease portfolio by type.  Changes in the allowance for credit losses for the three months ended March 31, 2021 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(In thousands)
Beginning balance	$	405,846			670,719			103,590			556,232			—	$	1,736,387
Provision for credit losses		(72,418	)		99,471			(13,435	)		(38,618	)		—		(25,000	)
Net charge-offs
Charge-offs		(26,945	)		(60,652	)		(2,399	)		(32,929	)		—		(122,925	)
Recoveries		22,511			6,560			2,033			16,640			—		47,744
Net charge-offs		(4,434	)		(54,092	)		(366	)		(16,289	)		—		(75,181	)
Ending balance	$	328,994			716,098			89,789			501,325			—	$	1,636,206

- 19 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the three months ended March 31, 2020 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	366,094			322,201			56,033			229,118			77,625		$	1,051,071
Adoption of new accounting standard		(61,474	)		23,656			53,896			194,004			(77,625	)		132,457
Provision for credit losses		66,594			88,666			9,291			85,449			—			250,000
Net charge-offs
Charge-offs		(16,383	)		(1,272	)		(5,102	)		(44,947	)		—			(67,704	)
Recoveries		3,261			438			1,674			13,169			—			18,542
Net charge-offs		(13,122	)		(834	)		(3,428	)		(31,778	)		—			(49,162	)
Ending balance	$	358,092			433,689			115,792			476,793			—		$	1,384,366

Despite the allocation in the preceding tables, the allowance for credit losses is general in nature and is available to absorb losses from any loan or lease type.  In establishing the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and targeted credit review processes and also estimates losses for loans and leases with similar risk characteristics on a collective basis. The amounts of specific loss components in the Company’s loan and lease portfolios are determined through a loan-by-loan analysis of larger balance commercial loans and commercial real estate loans that are in nonaccrual status. Such loss estimates are typically based on expected future cash flows, collateral values and other factors that may impact the borrower’s ability to pay. To the extent that those loans are collateral-dependent, they are evaluated based on the fair value of the loan’s collateral as estimated at or near the financial statement date.  As the quality of a loan deteriorates to the point of classifying the loan as “criticized,” the process of obtaining updated collateral valuation information is usually initiated, unless it is not considered warranted given factors such as the relative size of the loan, the characteristics of the collateral or the age of the last valuation.  In those cases where current appraisals may not yet be available, prior appraisals are utilized with adjustments, as deemed necessary, for estimates of subsequent declines  in values  as determined by line of  business and/or loan  workout personnel. Those adjustments are reviewed and assessed for reasonableness by the Company’s credit department.  Accordingly, for real estate collateral securing larger nonaccrual commercial loans and commercial real estate loans, estimated collateral values are based on current appraisals and estimates of value.  For non-real estate loans, collateral is assigned a discounted estimated liquidation value and, depending on the nature of the collateral, is verified through field exams or other procedures.  In assessing collateral, real estate and non-real estate values are reduced by an estimate of selling costs.

For residential real estate loans, including home equity loans and lines of credit, the excess of the loan balance over the net realizable value of the property collateralizing the loan is charged-off when the loan becomes 150 days delinquent.  That charge-off is based on recent indications of value from external parties that are generally obtained shortly after a loan becomes nonaccrual.  Loans to consumers that file for bankruptcy are generally charged-off to estimated net collateral value shortly after the Company is notified of such filings.  When evaluating individual home equity loans and lines of credit for charge off and for purposes of estimating losses in determining the allowance for credit losses, the Company gives consideration to the required repayment of any first lien positions related to collateral property. Modified loans, including smaller balance homogenous loans, that are considered to be troubled debt restructurings are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

Information with respect to loans and leases that were considered nonaccrual at the beginning and end of the reporting period and the interest income recognized on such loans for the three-month periods ended March 31, 2021 and 2020 follows.

	March 31, 2021						January 1, 2021		Three Months Ended March 31, 2021
	Amortized Cost with Allowance		Amortized Cost without Allowance		Total		Amortized Cost		Interest Income Recognized
	(In thousands)
Commercial, financial, leasing, etc.	$	211,894	$	83,175	$	295,069	$	306,827	$	3,085
Real estate:
Commercial		337,036		487,043		824,079		775,894		1,658
Residential builder and developer		1,224		—		1,224		1,094		33
Other commercial construction		24,186		102,039		126,225		114,039		41
Residential		186,374		199,134		385,508		365,729		4,498
Residential — limited documentation		84,342		58,727		143,069		147,170		79
Consumer:
Home equity lines and loans		44,548		34,640		79,188		79,392		952
Recreational finance		19,657		7,561		27,218		25,519		155
Automobile		33,270		4,949		38,219		39,404		49
Other		2,864		34,443		37,307		38,231		180
Total	$	945,395	$	1,011,711	$	1,957,106	$	1,893,299	$	10,730

	March 31, 2020						January 1, 2020		Three Months Ended March 31, 2020
	Amortized Cost with Allowance		Amortized Cost without Allowance		Total		Amortized Cost		Interest Income Recognized
	(In thousands)
Commercial, financial, leasing, etc.	$	153,924	$	132,723	$	286,647	$	346,743	$	1,738
Real estate:
Commercial		62,675		125,794		188,469		173,796		1,092
Residential builder and developer		3,204		—		3,204		4,708		48
Other commercial construction		12,039		22,896		34,935		35,881		861
Residential		67,221		226,417		293,638		322,504		6,819
Residential — limited documentation		26,444		92,873		119,317		114,667		201
Consumer:
Home equity lines and loans		26,230		36,841		63,071		65,039		1,459
Recreational finance		6,704		6,701		13,405		14,308		152
Automobile		9,802		9,449		19,251		21,293		47
Other		4,182		35,629		39,811		35,394		154
Total	$	372,425	$	689,323	$	1,061,748	$	1,134,333	$	12,571

- 21 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

In determining the allowance for credit losses, accruing loans with similar risk characteristics are generally evaluated collectively.  The Company utilizes statistically developed models to project principal balances over the remaining contractual lives of the loan portfolios and to determine estimated credit losses through a reasonable and supportable forecast period.  Individual loan credit quality indicators including loan grade and borrower repayment performance inform the models, which have been statistically developed based on historical correlations of credit losses with prevailing economic metrics, including unemployment, gross domestic product and real estate prices. Model forecasts may be adjusted for inherent limitations or biases that have been identified through independent validation and back-testing of model performance to actual realized results. At both March 31, 2021 and December 31, 2020, the Company utilized a reasonable and supportable forecast period of two years.  Subsequent to this forecast period the Company reverted, ratably over a one-year period, to historical loss experience to inform its estimate of losses for the remaining contractual life of each portfolio.  Changes in the amount of the allowance for credit losses reflect the outcome of the procedures described herein, including the impact of changes in macroeconomic forecasts as compared with previous forecasts, as well as the impact of portfolio concentrations, changes in underwriting practices, product expansions into new markets, imprecision in economic forecasts, geopolitical conditions and other risk factors that might influence the loss estimation process.

The Company’s reserve for off-balance sheet credit exposures was not material at March 31, 2021 and December 31, 2020.

Loan modifications

During the normal course of business, the Company modifies loans to maximize recovery efforts.  If the borrower is experiencing financial difficulty and a concession is granted, the Company considers such modifications as troubled debt restructurings and classifies those loans as either nonaccrual loans or renegotiated loans.  The types of concessions that the Company grants typically include principal deferrals and interest rate concessions, but may also include other types of concessions.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Loans and leases and the allowance for credit losses, continued

The table that follows summarizes the Company’s loan modification activities that were considered troubled debt restructurings for the three-month periods ended March 31, 2021 and 2020:  

					Post-modification (a)
	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
Three Months Ended March 31, 2021	(Dollars in thousands)
Commercial, financial, leasing, etc.		93	$	53,733	$	24,653	$	—	$	—	$	28,504	$	53,157
Real estate:
Commercial		33		26,870		11,160		—		2,214		12,422		25,796
Residential		123		39,583		38,557		—		—		1,117		39,674
Residential — limited documentation		10		1,116		1,059		—		—		—		1,059
Consumer:
Home equity lines and loans		26		1,715		1,486		—		—		174		1,660
Recreational finance		72		2,212		2,212		—		—		—		2,212
Automobile		276		4,969		4,955		—		—		14		4,969
Other		222		1,434		1,434		—		—		—		1,434
Total		855	$	131,632	$	85,516	$	—	$	2,214	$	42,231	$	129,961
Three Months Ended March 31, 2020
Commercial, financial, leasing, etc.		32	$	12,692	$	5,066	$	—	$	—	$	6,987	$	12,053
Real estate:
Commercial		10		39,642		1,355		—		—		35,968		37,323
Residential		27		10,178		3,247		—		—		8,977		12,224
Residential — limited documentation		9		2,980		2,667		—		—		1,232		3,899
Consumer:
Home equity lines and loans		6		738		412		—		—		334		746
Recreational finance		3		90		90		—		—		—		90
Automobile		9		182		182		—		—		—		182
Total		96	$	66,502	$	13,019	$	—	$	—	$	53,498	$	66,517

(a) Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.  The present value of interest rate concessions, discounted at the effective rate of the original loan, was not material.

Troubled debt restructurings are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.  Impairment of troubled debt restructurings that have subsequently defaulted may also be measured based on the loan’s observable market price or the fair value of collateral if the loan is collateral-dependent.  Charge-offs may also be recognized on troubled debt restructurings that have subsequently defaulted. Loans that were modified as troubled debt restructurings during the twelve months ended March 31, 2021 and 2020 and for which there was a subsequent payment default during the three-month periods ended March 31, 2021 and 2020, respectively, were not material.

The amount of foreclosed residential real estate property held by the Company was $24 million and $28 million at March 31, 2021 and December 31, 2020, respectively. There were $206 million and $214 million at March 31, 2021 and December 31, 2020, respectively, of loans secured by residential real estate that were in the process of foreclosure. Of all loans in the process of foreclosure at March 31, 2021, approximately 38% were government guaranteed.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

5. Borrowings           

M&T had $529 million of fixed and variable rate junior subordinated deferrable interest debentures ("Junior Subordinated Debentures") outstanding at March 31, 2021 that are held by various trusts that were issued in connection with the issuance by those trusts of preferred capital securities ("Capital Securities") and common securities ("Common Securities").  The proceeds from the issuances of the Capital Securities and the Common Securities were used by the trusts to purchase the Junior Subordinated Debentures.  The Common Securities of each of those trusts are wholly owned by M&T and are the only class of each trust's securities possessing general voting powers.  The Capital Securities represent preferred undivided interests in the assets of the corresponding trust. Under the Federal Reserve Board’s risk-based capital guidelines, the securities are includable in M&T’s Tier 2 regulatory capital.

Holders of the Capital Securities receive preferential cumulative cash distributions unless M&T exercises its right to extend the payment of interest on the Junior Subordinated Debentures as allowed by the terms of each such debenture, in which case payment of distributions on the respective Capital Securities will be deferred for comparable periods. During an extended interest period, M&T may not pay dividends or distributions on, or repurchase, redeem or acquire any shares of its capital stock.  In general, the agreements governing the Capital Securities, in the aggregate, provide a full, irrevocable and unconditional guarantee by M&T of the payment of distributions on, the redemption of, and any liquidation distribution with respect to the Capital Securities. The obligations under such guarantee and the Capital Securities are subordinate and junior in right of payment to all senior indebtedness of M&T.

The Capital Securities will remain outstanding until the Junior Subordinated Debentures are repaid at maturity, are redeemed prior to maturity or are distributed in liquidation to the trusts. The Capital Securities are mandatorily redeemable in whole, but not in part, upon repayment at the stated maturity dates (ranging from 2027 to 2033) of the Junior Subordinated Debentures or the earlier redemption of the Junior Subordinated Debentures in whole upon the occurrence of one or more events set forth in the indentures relating to the Capital Securities, and in whole or in part at any time after an optional redemption prior to contractual maturity contemporaneously with the optional redemption of the related Junior Subordinated Debentures in whole or in part, subject to possible regulatory approval.

On January 25, 2021,  $350 million of variable rate senior notes of M&T Bank, the principal bank subsidiary of M&T, matured.  In addition, on March 1, 2021, M&T Bank redeemed $500 million of subordinated notes that were due to mature on December 1, 2021.

6. Revenue from contracts with customers

A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, mortgage banking revenues, trading account and foreign exchange gains, investment securities gains, loan and letter of credit fees, income from bank-owned life insurance, and certain other revenues that are generally excluded from the scope of accounting guidance for revenue from contracts with customers.

For noninterest income revenue streams, the Company recognizes the expected amount of consideration as revenue when the performance obligations related to the services under the terms of a contract are satisfied. The Company’s contracts generally do not contain terms that necessitate significant judgment to determine the amount of revenue to recognize.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

6. Revenue from contracts with customers, continued

The Company generally charges customer accounts or otherwise bills customers upon completion of its services.  Typically the Company’s contracts with customers have a duration of one year or less and payment for services is received at least annually, but oftentimes more frequently as services are provided.  At March 31, 2021 and December 31, 2020, the Company had $61 million and $67 million, respectively, of amounts receivable related to recognized revenue from the sources in the accompanying tables.  Such amounts are classified in accrued interest and other assets in the Company’s consolidated balance sheet.  In certain situations the Company is paid in advance of providing services and defers the recognition of revenue until its service obligation is satisfied.  At March 31, 2021 and December 31, 2020, the Company had deferred revenue of $41 million and $42 million, respectively, related to the sources in the accompanying tables recorded in accrued interest and other liabilities in the consolidated balance sheet.

The following tables summarize sources of the Company’s noninterest income during the three-month periods ended March 31, 2021 and 2020 that are subject to the noted accounting guidance.

	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
Three Months Ended March 31, 2021	(In thousands)
Classification in consolidated    statement of income
Service charges on deposit accounts	$	12,497		24,295		2,893		—		—		51,452		1,640	$	92,777
Trust income		—		—		—		—		—		—		156,022		156,022
Brokerage services income		—		—		—		—		—		—		13,113		13,113
Other revenues from operations:
Merchant discount and credit card fees		9,481		10,407		445		—		—		3,921		109		24,363
Other		—		958		1,091		384		1,722		5,807		12,948		22,910
	$	21,978		35,660		4,429		384		1,722		61,180		183,832	$	309,185
Three Months Ended March 31, 2020
Classification in consolidated    statement of income
Service charges on deposit accounts	$	15,250		24,157		2,812		—		—		61,670		2,272	$	106,161
Trust income		12		304		—		—		—		—		148,435		148,751
Brokerage services income		—		—		—		—		—		—		13,129		13,129
Other revenues from operations:
Merchant discount and credit card fees		10,331		13,316		849		—		—		2,271		400		27,167
Other		—		2,186		843		857		922		5,982		12,516		23,306
	$	25,593		39,963		4,504		857		922		69,923		176,752	$	318,514

- 25 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

7. Pension plans and other postretirement benefits

The Company provides defined benefit pension and other postretirement benefits (including health care and life insurance benefits) to qualified retired employees.  Net periodic defined benefit cost for defined benefit plans consisted of the following:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended March 31
	2021			2020			2021			2020
	(In thousands)
Service cost	$	5,023			4,714			248		223
Interest cost on projected benefit obligation		15,434			17,886			327			419
Expected return on plan assets		(35,950	)		(31,475	)		—			—
Amortization of prior service cost (credit)		125			125			(1,175	)		(1,175	)
Amortization of net actuarial loss (gain)		22,150			13,950			(300	)		(300	)
Net periodic cost (benefit)	$	6,782			5,200			(900	)		(833	)

Service cost is reflected in salaries and employee benefits expense in the consolidated statement of income. The other components of net periodic benefit cost are reflected in other costs of operations. Expenses incurred in connection with the Company's defined contribution pension and retirement savings plans totaled $33 million and $27 million for the three months ended March 31, 2021 and 2020, respectively, and are included in salaries and employee benefits expense.

8. Earnings per common share

The computations of basic earnings per common share follow:

	Three Months Ended March 31
	2021			2020
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	447,249		$	268,822
Less: Preferred stock dividends		(17,050	)		(17,078	)
Net income available to common equity		430,199			251,744
Less: Income attributable to unvested stock-based    compensation awards		(2,108	)		(1,043	)
Net income available to common shareholders	$	428,091		$	250,701
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation    awards		129,414			130,440
Less: Unvested stock-based compensation awards		(877	)		(744	)
Weighted-average shares outstanding		128,537			129,696
Basic earnings per common share	$	3.33		$	1.93

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

8. Earnings per common share, continued

The computations of diluted earnings per common share follow:

	Three Months Ended March 31
	2021			2020
	(In thousands, except per share)
Net income available to common equity	$	430,199		$	251,744
Less: Income attributable to unvested stock-based    compensation awards		(2,106	)		(1,043	)
Net income available to common shareholders	$	428,093		$	250,701
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation    awards		129,414			130,440
Less: Unvested stock-based compensation awards		(877	)		(744	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		132			59
Adjusted weighted-average shares outstanding		128,669			129,755
Diluted earnings per common share	$	3.33		$	1.93

GAAP defines unvested share-based awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) as participating securities that shall be included in the computation of earnings per common share pursuant to the two-class method.  The Company has issued stock-based compensation awards in the form of restricted stock and restricted stock units which, in accordance with GAAP, are considered participating securities.

Stock-based compensation awards to purchase common stock of M&T representing 462,342 and 464,694 common shares during the three-month periods ended March 31, 2021 and 2020, respectively, were not included in the computations of diluted earnings per common share because the effect on those periods would have been antidilutive.

- 27 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

9. Comprehensive income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income: 

	Investment			Defined Benefit						Total Amount				Income
	Securities			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2021	$	195,386			(650,087	)		369,558		$	(85,143	)			22,111		$	(63,032	)
Other comprehensive income before reclassifications:
Unrealized holding losses, net		(32,025	)		—			—			(32,025	)			8,907			(23,118	)
Foreign currency translation adjustment		—			—			684			684				(136	)		548
Unrealized losses on cash flow hedges		—			—			(9,498	)		(9,498	)			2,571			(6,927	)
Total other comprehensive income before    reclassifications		(32,025	)		—			(8,814	)		(40,839	)			11,342			(29,497	)
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on    held-to-maturity (“HTM”) securities		990			—			—			990		(a)		(276	)		714
Gains realized in net income		(3	)		—			—			(3	)	(b)		1			(2	)
Accretion of net gain on terminated cash flow hedges		—			—			(30	)		(30	)	(c)		9			(21	)
Net yield adjustment from cash flow hedges currently in effect		—			—			(82,044	)		(82,044	)	(a)		22,215			(59,829	)
Amortization of prior service credit		—			(1,050	)		—			(1,050	)	(d)		384			(666	)
Amortization of actuarial losses		—			21,850			—			21,850		(d)		(7,995	)		13,855
Total other comprehensive income (loss)		(31,038	)		20,800			(90,888	)		(101,126	)			25,680			(75,446	)
Balance — March 31, 2021	$	164,348			(629,287	)		278,670		$	(186,269	)			47,791		$	(138,478	)
Balance — January 1, 2020	$	50,701			(464,548	)		133,888		$	(279,959	)			73,279		$	(206,680	)
Other comprehensive income before reclassifications:
Unrealized holding gains, net		131,423			—			—			131,423				(34,544	)		96,879
Foreign currency translation adjustment		—			—			(3,225	)		(3,225	)			282			(2,943	)
Unrealized gains on cash flow hedges		—			—			456,333			456,333				(119,970	)		336,363
Total other comprehensive income before    reclassifications		131,423			—			453,108			584,531				(154,232	)		430,299
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on    HTM securities		772			—			—			772		(a)		(203	)		569
Accretion of net gain on terminated cash flow hedges		—			—			(34	)		(34	)	(c)		9			(25	)
Net yield adjustment from cash flow hedges currently in effect		—			—			(32,041	)		(32,041	)	(a)		8,423			(23,618	)
Amortization of prior service credit		—			(1,050	)		—			(1,050	)	(d)		276			(774	)
Amortization of actuarial losses		—			13,650			—			13,650		(d)		(3,588	)		10,062
Total other comprehensive income		132,195			12,600			421,033			565,828				(149,315	)		416,513
Balance — March 31, 2020	$	182,896			(451,948	)		554,921		$	285,869				(76,036	)	$	209,833

(a) Included in interest income.

(b) Included in gain (loss) on bank investment securities.

(c) Included in interest expense.

(d) Included in other costs of operations.

- 28 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

9. Comprehensive income, continued

Accumulated other comprehensive income (loss), net consisted of the following:

				Defined
	Investment			Benefit
	Securities			Plans			Other			Total
	(In thousands)
Balance — December 31, 2020	$	144,602		$	(481,064	)	$	273,430		$	(63,032	)
Net gain (loss) during period		(22,406	)		13,189			(66,229	)		(75,446	)
Balance — March 31, 2021	$	122,196		$	(467,875	)	$	207,201		$	(138,478	)

10. Derivative financial instruments

As part of managing interest rate risk, the Company enters into interest rate swap agreements to modify the repricing characteristics of certain portions of the Company’s portfolios of earning assets and interest-bearing liabilities.  The Company designates interest rate swap agreements utilized in the management of interest rate risk as either fair value hedges or cash flow hedges.  Interest rate swap agreements are generally entered into with counterparties that meet established credit standards and most contain master netting, collateral and/or settlement provisions protecting the at-risk party. Based on adherence to the Company’s credit standards and the presence of the netting, collateral or settlement provisions, the Company believes that the credit risk inherent in these contracts was not material as of March 31, 2021.

The net effect of interest rate swap agreements was to increase net interest income by $91 million and $36 million during the three-month periods ended March 31, 2021 and 2020, respectively.

Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:

					Weighted-						Estimated
	Notional		Average		Average Rate						Fair Value
	Amount		Maturity		Fixed			Variable			Gain (Loss) (a)
	(In thousands)		(In years)								(In thousands)
March 31, 2021
Fair value hedges:
Fixed rate long-term borrowings (b)	$	1,650,000		3.1		2.86	%		0.75	%	$	(1,117	)
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(c)		36,050,000		0.9		1.80	%		0.11	%		(2,077	)
Total	$	37,700,000		1.0							$	(3,194	)
December 31, 2020
Fair value hedges:
Fixed rate long-term borrowings (b)	$	1,650,000		3.3		2.86	%		0.79	%	$	651
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(d)		49,400,000		0.9		2.22	%		0.15	%		425
Total	$	51,050,000		1.0							$	1,076

(a) Certain clearinghouse exchanges consider payments by counterparties for variation margin on derivative instruments to be settlements of those positions. The impact of such treatment at March 31, 2021 and December 31, 2020 was a reduction of the estimated fair value gains on interest rate swap agreements designated as fair value hedges of $70.6 million and $101.5 million, respectively, and on interest rate swap agreements designated as cash flow hedges of $283.1 million and $372.2 million, respectively.

(b) Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

(c) Includes notional amount and terms of $18.7 billion of forward-starting interest rate swap agreements that become effective in 2021 - 2022.

(d) Includes notional amount and terms of $32.1 billion of forward-starting interest rate swap agreements that become effective in  2021 - 2022.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

10. Derivative financial instruments, continued

The Company utilizes commitments to sell residential and commercial real estate loans to hedge the exposure to changes in the fair value of real estate loans held for sale.  Such commitments have generally been designated as fair value hedges. The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in fair value of certain commitments to originate real estate loans for sale.

Derivative financial instruments used for trading account purposes included interest rate contracts, foreign exchange and other option contracts, foreign exchange forward and spot contracts, and financial futures. Interest rate contracts entered into for trading account purposes had notional values of $36.2 billion and $37.8 billion at March 31, 2021 and December 31, 2020, respectively.  The notional amounts of foreign currency and other option and futures contracts entered into for trading account purposes aggregated $910 million and $776 million at March 31, 2021 and December 31, 2020, respectively.

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:

	Asset Derivatives				Liability Derivatives
	Fair Value				Fair Value
	March 31,		December 31,		March 31,		December 31,
	2021		2020		2021		2020
	(In thousands)
Derivatives designated and qualifying as hedging instruments
Interest rate swap agreements (a)	$	172	$	1,968	$	3,366	$	892
Commitments to sell real estate loans (a)		6,270		1,488		146		8,458
		6,442		3,456		3,512		9,350
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans     for sale (a)		22,921		43,599		9,164		365
Commitments to sell real estate loans (a)		36,179		2,409		5,605		13,868
Trading:
Interest rate contracts (b)		629,458		1,008,913		84,567		105,768
Foreign exchange and other option and futures contracts (b)		8,786		9,608		10,672		11,134
		697,344		1,064,529		110,008		131,135
Total derivatives	$	703,786	$	1,067,985	$	113,520	$	140,485

(a) Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b) Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.  The impact of variation margin payments at March 31, 2021 and December 31, 2020 was a reduction of the estimated fair value of interest rate contracts in the trading account in an asset position of $54.6 million and $5.6 million, respectively, and in a liability position of $502.0 million and $806.5 million, respectively.

	Amount of Gain (Loss) Recognized
	Three Months Ended March 31, 2021					Three Months Ended March 31, 2020
	Derivative			Hedged Item		Derivative		Hedged Item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(32,658	)		31,898	$	88,710		(87,824	)
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(3,234	)			$	12,786
Foreign exchange and other option and futures contracts (b)		1,608					4,352
Total	$	(1,626	)			$	17,138

(a) Reported as an adjustment to interest expense.

(b) Reported as trading account and foreign exchange gains.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

10. Derivative financial instruments, continued

	Carrying Amount of the Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount of the Hedged Item
	March 31, 2021		December 31, 2020		March 31, 2021		December 31, 2020
	(In thousands)
Location in the Consolidated Balance Sheet    of the Hedged Items in Fair Value Hedges
Long-term debt	$	1,718,238	$	1,750,048	$	69,428	$	101,326

The amount of interest income recognized in the consolidated statement of income associated with derivatives designated as cash flow hedges was $82 million and $32 million for the three months ended March 31, 2021 and 2020, respectively. As of March 31, 2021 the unrealized gain recognized in other comprehensive income related to cash flow hedges was $281 million, of which $74 million, $165 million and $42 million related to interest rate swap agreements maturing in 2021, 2022, and 2023, respectively.

The Company also has commitments to sell and commitments to originate residential and commercial real estate loans that are considered derivatives.  The Company designates certain of the commitments to sell real estate loans as fair value hedges of real estate loans held for sale.  The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in the fair value of certain commitments to originate real estate loans for sale.  As a result of these activities, net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans were approximately $55 million and $64 million at March 31, 2021 and December 31, 2020, respectively.  Changes in unrealized gains and losses are included in mortgage banking revenues and, in general, are realized in subsequent periods as the related loans are sold and commitments satisfied.

The Company does not offset derivative asset and liability positions in its consolidated financial statements.  The Company’s exposure to credit risk by entering into derivative contracts is mitigated through master netting agreements and collateral posting or settlement requirements.  Master netting agreements covering interest rate and foreign exchange contracts with the same party include a right to set-off that becomes enforceable in the event of default, early termination or under other specific conditions.

The aggregate fair value of derivative financial instruments in a liability position and the net liability positions with counterparties which are subject to master netting arrangements was $50 million and $114 million at March 31, 2021 and December 31, 2020, respectively.  The Company was required to post collateral relating to those positions of $50 million and $103 million at March 31, 2021 and December 31, 2020, respectively.   Certain of the Company’s derivative financial instruments contain provisions that require the Company to maintain specific credit ratings from credit rating agencies to avoid higher collateral posting requirements.  If the Company’s debt rating were to fall below specified ratings, the counterparties of the derivative financial instruments could demand immediate incremental collateralization on those instruments in a net liability position.  The aggregate fair value of all derivative financial instruments with such credit risk-related contingent features in a net liability position on March 31, 2021 was not material.

The aggregate fair value of derivative financial instruments in an asset position and the net asset positions with counterparties which are subject to enforceable master netting arrangements was $4 million at March 31, 2021 and $3 million at December 31, 2020.  Counterparties posted collateral relating to those positions of $3 million at each of March 31, 2021 and December 31, 2020. Trading account interest rate swap agreements entered into with customers are subject to the Company’s credit risk standards and often contain collateral provisions.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

10. Derivative financial instruments, continued

In addition to the derivative contracts noted above, the Company clears certain derivative transactions through a clearinghouse, rather than directly with counterparties. Those transactions cleared through a clearinghouse require initial margin collateral and variation margin payments depending on the contracts being in a net asset or liability position. The amount of initial margin collateral posted by the Company was $150 million and $135 million at March 31, 2021 and December 31, 2020, respectively. The fair value asset and liability amounts of derivative contracts have been reduced by variation margin payments treated as settlements as described herein.  Variation margin on derivative contracts not treated as settlements continues to represent collateral posted or received by the Company.

11. Variable interest entities and asset securitizations

The Company’s securitization activity has consisted of securitizing loans originated for sale into government issued or guaranteed mortgage-backed securities. The Company has not recognized any losses as a result of having securitized assets.

As described in note 5, M&T has issued junior subordinated debentures payable to various trusts that have issued Capital Securities. M&T owns the common securities of those trust entities. The Company is not considered to be the primary beneficiary of those entities and, accordingly, the trusts are not included in the Company’s consolidated financial statements. At each of March 31, 2021 and December 31, 2020, the Company included the junior subordinated debentures as “long-term borrowings” in its consolidated balance sheet and recognized $23 million in other assets for its “investment” in the common securities of the trusts that will be concomitantly repaid to M&T by the respective trust from the proceeds of M&T’s repayment of the junior subordinated debentures associated with preferred capital securities described in note 5.

The Company has invested as a limited partner in various partnerships that collectively had total assets of approximately $2.3 billion at each of March 31, 2021 and December 31, 2020. Those partnerships generally construct or acquire properties for which the investing partners are eligible to receive certain federal income tax credits in accordance with government guidelines. Such investments may also provide tax deductible losses to the partners. The partnership investments also assist the Company in achieving its community reinvestment initiatives. As a limited partner, there is no recourse to the Company by creditors of the partnerships. However, the tax credits that result from the Company’s investments in such partnerships are generally subject to recapture should a partnership fail to comply with the respective government regulations. The Company’s carrying amount of its investments in such partnerships was $853 million, including $361 million of unfunded commitments, at March 31, 2021 and $861 million, including $406 million of unfunded commitments, at December 31, 2020.  Contingent commitments to provide additional capital contributions to these partnerships were not material at March 31, 2021. The Company has not provided financial or other support to the partnerships that was not contractually required. The Company’s maximum exposure to loss from its investments in such partnerships as of March 31, 2021 was $1.1 billion, including possible recapture of certain tax credits.  Management currently estimates that no material losses are probable as a result of the Company’s involvement with such entities.  The Company, in its position as limited partner, does not direct the activities that most significantly impact the economic performance of the partnerships and, therefore, in accordance with the accounting provisions for variable interest entities, the partnership entities are not included in the Company’s consolidated financial statements.  The Company’s investment in qualified affordable housing projects is amortized to income taxes in the consolidated statement of income as tax credits and other tax benefits resulting from deductible losses associated with the projects are received. The Company amortized $19 million and $21 million of its investments in qualified affordable housing projects to income tax expense during the three-month periods ended March 31, 2021 and 2020, respectively, and recognized $21 million and $26 million of tax credits and other tax benefits during those respective periods.

The Company serves as investment advisor for certain registered money-market funds.  The Company has no explicit arrangement to provide support to those funds, but may waive portions of its allowable management fees as a result of market conditions.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements

GAAP permits an entity to choose to measure eligible financial instruments and other items at fair value.  The Company has not made any fair value elections at March 31, 2021.

Pursuant to GAAP, 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. A three-level hierarchy exists in GAAP for fair value measurements based upon the inputs to the valuation of an asset or liability.

• Level 1 — Valuation is based on quoted prices in active markets for identical assets and liabilities.

• Level 2 — Valuation is determined from quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar instruments in markets that are not active or by model-based techniques in which all significant inputs are observable in the market.

• Level 3 — Valuation is derived from model-based and other techniques in which at least one significant input is unobservable and which may be based on the Company's own estimates about the assumptions that market participants would use to value the asset or liability.

When available, the Company attempts to use quoted market prices in active markets to determine fair value and classifies such items as Level 1 or Level 2. If quoted market prices in active markets are not available, fair value is often determined using model-based techniques incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using model-based techniques are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. The following is a description of the valuation methodologies used for the Company's assets and liabilities that are measured on a recurring basis at estimated fair value.

Trading account assets and liabilities

Trading account assets and liabilities consist primarily of interest rate contracts and foreign exchange contracts with customers who require such services with offsetting positions with third parties to minimize the Company's risk with respect to such transactions. The Company generally determines the fair value of its derivative trading account assets and liabilities using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2.  Mutual funds held in connection with deferred compensation and other arrangements have been classified as Level 1 valuations. Valuations of investments in municipal and other bonds can generally be obtained through reference to quoted prices in less active markets for the same or similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2.

Investment securities available for sale and equity securities

The majority of the Company's available-for-sale investment securities have been valued by reference to prices for similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2. Certain investments in mutual funds and equity securities are actively traded and, therefore, have been classified as Level 1 valuations.

Real estate loans held for sale

The Company utilizes commitments to sell real estate loans to hedge the exposure to changes in fair value of real estate loans held for sale. The carrying value of hedged real estate loans held for sale includes changes in estimated fair value during the hedge period.  Typically, the Company attempts to hedge real estate loans held for sale from the date of close through the sale date.  The fair value of hedged real estate loans held for sale is generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans with similar characteristics and, accordingly, such loans have been classified as a Level 2 valuation.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

Commitments to originate real estate loans for sale and commitments to sell real estate loans

The Company enters into various commitments to originate real estate loans for sale and commitments to sell real estate loans. Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value on the consolidated balance sheet. The estimated fair values of such commitments were generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans to certain government-sponsored entities and other parties. The fair valuations of commitments to sell real estate loans generally result in a Level 2 classification. The estimated fair value of commitments to originate real estate loans for sale are adjusted to reflect the Company's anticipated commitment expirations. The estimated commitment expirations are considered significant unobservable inputs contributing to the Level 3 classification of commitments to originate real estate loans for sale.  Significant unobservable inputs used in the determination of estimated fair value of commitments to originate real estate loans for sale are included in the accompanying table of significant unobservable inputs to Level 3 measurements.

Interest rate swap agreements used for interest rate risk management

The Company utilizes interest rate swap agreements as part of the management of interest rate risk to modify the repricing characteristics of certain portions of its portfolios of earning assets and interest-bearing liabilities. The Company generally determines the fair value of its interest rate swap agreements using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2. The Company has considered counterparty credit risk in the valuation of its interest rate swap agreement assets and has considered its own credit risk in the valuation of its interest rate swap agreement liabilities.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

The following tables present assets and liabilities at March 31, 2021 and December 31, 2020 measured at estimated fair value on a recurring basis:

	Fair Value Measurements		Level 1		Level 2		Level 3
	(In thousands)
March 31, 2021
Trading account assets	$	687,359	$	49,115	$	638,244	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		7,013		—		7,013		—
Mortgage-backed securities:
Government issued or guaranteed		4,225,089		—		4,225,089		—
Privately issued		16		—		—		16
Other debt securities		132,319		—		132,319		—
		4,364,437		—		4,364,421		16
Equity securities		81,792		64,150		17,642		—
Real estate loans held for sale		871,026		—		871,026		—
Other assets (a)		65,542		—		42,621		22,921
Total assets	$	6,070,156	$	113,265	$	5,933,954	$	22,937
Trading account liabilities	$	95,239	$	—	$	95,239	$	—
Other liabilities (a)		18,281		—		9,117		9,164
Total liabilities	$	113,520	$	—	$	104,356	$	9,164
December 31, 2020
Trading account assets	$	1,068,581	$	50,060	$	1,018,521	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		9,338		—		9,338		—
Mortgage-backed securities:
Government issued or guaranteed		4,683,438		—		4,683,438		—
Privately issued		16		—		—		16
Other debt securities		129,814		—		129,814		—
		4,822,606		—		4,822,590		16
Equity securities		92,985		63,129		29,856		—
Real estate loans held for sale		1,054,676		—		1,054,676		—
Other assets (a)		49,464		—		5,865		43,599
Total assets	$	7,088,312	$	113,189	$	6,931,508	$	43,615
Trading account liabilities	$	116,902	$	—	$	116,902	$	—
Other liabilities (a)		23,583		—		23,218		365
Total liabilities	$	140,485	$	—	$	140,120	$	365

 (a) Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended March 31, 2021 and 2020 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities		Other Assets and Other Liabilities
2021	(In thousands)
Balance — January 1, 2021	$	16		43,234
Total gains realized/unrealized:
Included in earnings		—		6,025		(a)
Transfers out of Level 3		—		(35,502	)	(b)
Balance — March 31, 2021	$	16		13,757
Changes in unrealized gains included in earnings    related to assets still held at March 31, 2021	$	—		5,300		(a)

2020
Balance — January 1, 2020	$	16	10,740
Total gains realized/unrealized:
Included in earnings		—	44,081		(a)
Transfers out of Level 3		—	(19,794	)	(b)
Balance — March 31, 2020	$	16	35,027
Changes in unrealized gains included in earnings    related to assets still held at March 31, 2020	$	—	32,584		(a)

(a) Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(b) Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

  The Company is required, on a nonrecurring basis, to adjust the carrying value of certain assets or provide valuation allowances related to certain assets using fair value measurements.  The more significant of those assets follow.

Loans

Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectable portions of those loans. Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and the related nonrecurring fair value measurement adjustments have been classified as Level 2, unless significant adjustments have been made to the valuation that are not readily observable by market participants. Non-real estate collateral supporting commercial loans generally consists of business assets such as receivables, inventory and equipment.  Fair value estimations are typically determined by discounting recorded values of those assets to reflect estimated net realizable value considering specific borrower facts and circumstances and the experience of credit personnel in their dealings with similar borrower collateral liquidations.  Such discounts were in the range of 15% to 90% with a weighted-average of 54%

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

at March 31, 2021.  As these discounts are not readily observable and are considered significant, the valuations have been classified as Level 3.  Automobile collateral is typically valued by reference to independent pricing sources based on recent sales transactions of similar vehicles and, accordingly, the related nonrecurring fair value measurement adjustments have been classified as Level 2.  Collateral values for other consumer installment loans are generally estimated based on historical recovery rates for similar types of loans which at March 31, 2020 was 45%.  As these recovery rates are not readily observable by market participants, such valuation adjustments have been classified as Level 3.  Loans subject to nonrecurring fair value measurement were $658 million at March 31, 2021 ($357 million and $301 million of which were classified as Level 2 and Level 3, respectively), $652 million at December 31, 2020 ($339 million and $313 million of which were classified as Level 2 and Level 3, respectively) and $196 million at March 31, 2020 ($116 million and $80 million of which were classified as Level 2 and Level 3, respectively).  Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on March 31, 2021 and 2020 were decreases of $66 million and $21 million for the three-month periods ended March 31, 2021 and 2020, respectively.

Assets taken in foreclosure of defaulted loans

Assets taken in foreclosure of defaulted loans are primarily comprised of commercial and residential real property and are generally measured at the lower of cost or fair value less costs to sell.  The fair value of the real property is generally determined using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and, accordingly, the related nonrecurring fair value measurement adjustments have generally been classified as Level 2.  Assets taken in foreclosure of defaulted loans subject to nonrecurring fair value measurement were $9 million and $14 million at March 31, 2021 and 2020, respectively.  Changes in fair value recognized for those foreclosed assets held by the Company were not material during the three-month periods ended March 31, 2021 and 2020.

Capitalized servicing rights

Capitalized servicing rights are initially measured at fair value in the Company’s consolidated balance sheet. The Company utilizes the amortization method to subsequently measure its capitalized servicing assets. In accordance with GAAP, the Company must record impairment charges, on a nonrecurring basis, when the carrying value of certain strata exceed their estimated fair value. To estimate the fair value of servicing rights, the Company considers market prices for similar assets, if available, and the present value of expected future cash flows associated with the servicing rights calculated using assumptions that market participants would use in estimating future servicing income and expense. Such assumptions include estimates of the cost of servicing loans, loan default rates, an appropriate discount rate, and prepayment speeds. For purposes of evaluating and measuring impairment of capitalized servicing rights, the Company stratifies such assets based on the predominant risk characteristics of the underlying financial instruments that are expected to have the most impact on projected prepayments, cost of servicing and other factors affecting future cash flows associated with the servicing rights. Such factors may include financial asset or loan type, note rate and term. The amount of impairment recognized is the amount by which the carrying value of the capitalized servicing rights for a stratum exceed estimated fair value. Impairment is recognized through a valuation allowance. The determination of fair value of capitalized servicing rights is considered a Level 3 valuation. Capitalized servicing rights related to residential mortgage loans of $156 million and $159 million at March 31, 2021 and December 31, 2020, respectively, required a valuation allowance of $21 million and $30 million, respectively. Significant unobservable inputs used in this Level 3 valuation included weighted-average prepayment speeds of 15.22% and 16.01% at March 31, 2021 and December 31, 2020, respectively, and a weighted-average option-adjusted spread of 900 basis points at each date. There was a recovery of previously recognized impairment charges for capitalized servicing rights of $9 million during the three months ended March 31, 2021 and an impairment charge of $10 million during the three months ended March 31, 2020.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

Significant unobservable inputs to Level 3 measurements

The following tables present quantitative information about significant unobservable inputs used in the fair value measurements for certain Level 3 assets and liabilities at March 31, 2021 and December 31, 2020:

	Fair Value		Valuation Technique	Unobservable Inputs/Assumptions		Range (Weighted- Average)
	(In thousands)
March 31, 2021
Recurring fair value measurements
Privately issued mortgage-    backed securities	$	16	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		13,757	Discounted cash flow	Commitment expirations		0% - 98% (18%)
December 31, 2020
Recurring fair value measurements
Privately issued mortgage-    backed securities	$	16	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		43,234	Discounted cash flow	Commitment expirations		0% - 98% (16%)

(a) Other Level 3 assets (liabilities) consist of commitments to originate real estate loans.

Sensitivity of fair value measurements to changes in unobservable inputs

An increase (decrease) in the estimate of expirations for commitments to originate real estate loans would generally result in a lower (higher) fair value measurement. Estimated commitment expirations are derived considering loan type, changes in interest rates and remaining length of time until closing.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

Disclosures of fair value of financial instruments

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:

	March 31, 2021
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
	(In thousands)
Financial assets:
Cash and cash equivalents	$	1,258,989			1,258,989			1,213,877		45,112			—
Interest-bearing deposits at banks		31,407,227			31,407,227			—		31,407,227			—
Federal funds sold		1,000			1,000			—		1,000			—
Trading account assets		687,359			687,359			49,115		638,244			—
Investment securities		6,610,667			6,682,742			64,150		6,551,036			67,556
Loans and leases:
Commercial loans and leases		27,811,190			27,509,182			—		—			27,509,182
Commercial real estate loans		37,425,974			36,661,758			—		98,513			36,563,245
Residential real estate loans		17,349,683			17,501,398			—		4,015,464			13,485,934
Consumer loans		16,712,233			16,781,406			—		—			16,781,406
Allowance for credit losses		(1,636,206	)		—			—		—			—
Loans and leases, net		97,662,874			98,453,744			—		4,113,977			94,339,767
Accrued interest receivable		440,658			440,658			—		440,658			—
Financial liabilities:
Noninterest-bearing deposits	$	(53,641,419	)		(53,641,419	)		—		(53,641,419	)		—
Savings and interest-checking deposits		(70,679,036	)		(70,679,036	)		—		(70,679,036	)		—
Time deposits		(3,514,219	)		(3,526,947	)		—		(3,526,947	)		—
Deposits at Cayman Islands office		(641,691	)		(641,691	)		—		(641,691	)		—
Short-term borrowings		(58,957	)		(58,957	)		—		(58,957	)		—
Long-term borrowings		(3,498,503	)		(3,609,625	)		—		(3,609,625	)		—
Accrued interest payable		(43,745	)		(43,745	)		—		(43,745	)		—
Trading account liabilities		(95,239	)		(95,239	)		—		(95,239	)		—
Other financial instruments:
Commitments to originate real estate    loans for sale	$	13,757			13,757			—		—			13,757
Commitments to sell real estate loans		36,698			36,698			—		36,698			—
Other credit-related commitments		(134,928	)		(134,928	)		—		—			(134,928	)
Interest rate swap agreements used for    interest rate risk management		(3,194	)		(3,194	)		—		(3,194	)		—

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Fair value measurements, continued

	December 31, 2020
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
				(In thousands)
Financial assets:
Cash and cash equivalents	$	1,552,743			1,552,743			1,497,457		55,286			—
Interest-bearing deposits at banks		23,663,810			23,663,810			—		23,663,810			—
Trading account assets		1,068,581			1,068,581			50,060		1,018,521			—
Investment securities		7,045,697			7,138,989			63,129		7,005,571			70,289
Loans and leases:
Commercial loans and leases		27,574,564			27,220,699			—		—			27,220,699
Commercial real estate loans		37,637,889			36,816,580			—		277,911			36,538,669
Residential real estate loans		16,752,993			17,089,141			—		4,135,655			12,953,486
Consumer loans		16,570,421			16,554,050			—		—			16,554,050
Allowance for credit losses		(1,736,387	)		—			—		—			—
Loans and leases, net		96,799,480			97,680,470			—		4,413,566			93,266,904
Accrued interest receivable		419,936			419,936			—		419,936			—
Financial liabilities:
Noninterest-bearing deposits	$	(47,572,884	)		(47,572,884	)		—		(47,572,884	)		—
Savings and interest-checking deposits		(67,680,840	)		(67,680,840	)		—		(67,680,840	)		—
Time deposits		(3,899,910	)		(3,919,367	)		—		(3,919,367	)		—
Deposits at Cayman Islands office		(652,104	)		(652,104	)		—		(652,104	)		—
Short-term borrowings		(59,482	)		(59,482	)		—		(59,482	)		—
Long-term borrowings		(4,382,193	)		(4,490,433	)		—		(4,490,433	)		—
Accrued interest payable		(59,916	)		(59,916	)		—		(59,916	)		—
Trading account liabilities		(116,902	)		(116,902	)		—		(116,902	)		—
Other financial instruments:
Commitments to originate real estate    loans for sale	$	43,234			43,234			—		—			43,234
Commitments to sell real estate loans		(18,429	)		(18,429	)		—		(18,429	)		—
Other credit-related commitments		(133,354	)		(133,354	)		—		—			(133,354	)
Interest rate swap agreements used    for interest rate risk management		1,076			1,076			—		1,076			—

With the exception of marketable securities, certain off-balance sheet financial instruments and mortgage loans originated for sale, the Company’s financial instruments are not readily marketable and market prices do not exist. The Company, in attempting to comply with the provisions of GAAP that require disclosures of fair value of financial instruments, has not attempted to market its financial instruments to potential buyers, if any exist. Since negotiated prices in illiquid markets depend greatly upon the then present motivations of the buyer and seller, it is reasonable to assume that actual sales prices could vary widely from any estimate of fair value made without the benefit of negotiations. Additionally, changes in market interest rates can dramatically impact the value of financial instruments in a short period of time.

The Company does not believe that the estimated information presented herein is representative of the earnings power or value of the Company. The preceding analysis, which is inherently limited in depicting fair value, also does not consider any value associated with existing customer relationships nor the ability of the Company to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

13. Commitments and contingencies

In the normal course of business, various commitments and contingent liabilities are outstanding.  The following table presents the Company's significant commitments.  Certain of these commitments are not included in the Company's consolidated balance sheet.

	March 31,		December 31,
	2021		2020
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,626,965	$	5,563,854
Commercial real estate loans to be sold		249,514		363,735
Other commercial real estate		6,426,199		7,237,367
Residential real estate loans to be sold		1,081,889		1,026,118
Other residential real estate		600,212		665,259
Commercial and other		20,140,102		19,427,886
Standby letters of credit		2,231,893		2,241,417
Commercial letters of credit		13,260		27,332
Financial guarantees and indemnification contracts		4,365,308		4,220,531
Commitments to sell real estate loans		1,881,140		2,108,823

Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  In addition to the amounts in the preceding table, the Company had discretionary funding commitments to commercial customers of $10.5 billion and $10.4 billion at March 31, 2021 and December 31, 2020, respectively, that the Company had the unconditional right to cancel prior to funding. Standby and commercial letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party.   Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party, whereas commercial letters of credit are issued to facilitate commerce and typically result in the commitment being funded when the underlying transaction is consummated between the customer and a third party.  The credit risk associated with commitments to extend credit and standby and commercial letters of credit is essentially the same as that involved with extending loans to customers and is subject to normal credit policies.  Collateral may be obtained based on management's assessment of the customer's creditworthiness.

Financial guarantees and indemnification contracts are oftentimes similar to standby letters of credit and include mandatory purchase agreements issued to ensure that customer obligations are fulfilled, recourse obligations associated with sold loans, and other guarantees of customer performance or compliance with designated rules and regulations.  Included in financial guarantees and indemnification contracts are loan principal amounts sold with recourse in conjunction with the Company's involvement in the Fannie Mae Delegated Underwriting and Servicing program.  The Company's maximum credit risk for recourse associated with loans sold under this program totaled approximately $4.0 billion at each of March 31, 2021 and December 31, 2020.

Since many loan commitments, standby letters of credit, and guarantees and indemnification contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.

The Company utilizes commitments to sell real estate loans to hedge exposure to changes in the fair value of real estate loans held for sale.  Such commitments are considered derivatives and along with commitments to originate real estate loans to be held for sale are generally recorded in the consolidated balance sheet at estimated fair market value.

The Company is contractually obligated to repurchase previously sold residential real estate loans that do not ultimately meet investor sale criteria related to underwriting procedures or loan documentation.  When required to do so, the Company may reimburse loan purchasers for losses incurred or may repurchase certain loans.  The Company reduces residential mortgage banking revenues by an estimate for losses related to its obligations to loan purchasers.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

13. Commitments and contingencies, continued

The amount of those charges is based on the volume of loans sold, the level of reimbursement requests received from loan purchasers and estimates of losses that may be associated with previously sold loans. At March 31, 2021, the Company believes that its obligation to loan purchasers was not material to the Company’s consolidated financial position.

M&T and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings and matters in which claims for monetary damages are asserted.  On an on-going basis management, after consultation with legal counsel, assesses the Company’s liabilities and contingencies in connection with such proceedings.  For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent pending or threatened litigation could result in exposure in excess of the recorded liability, the amount of such excess is not currently estimable.  Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was estimated to be between $0 and $25 million as of March 31, 2021.  Although the Company does not believe that the outcome of pending legal matters will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

14. Segment information

Reportable segments have been determined based upon the Company's internal profitability reporting system, which is organized by strategic business unit.  Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer and the distribution of those products and services are similar.  The reportable segments are Business Banking, Commercial Banking, Commercial Real Estate, Discretionary Portfolio, Residential Mortgage Banking and Retail Banking.

The financial information of the Company's segments was compiled utilizing the accounting policies described in note 22 of Notes to Financial Statements in the 2020 Annual Report.  The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP.  As a result, the financial information of the reported segments is not necessarily comparable with similar information reported by other financial institutions.  Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in reported segment financial data.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

14. Segment information, continued

Information about the Company's segments is presented in the following table:

	Three Months Ended March 31
	2021								2020
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)			Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	155,903		669			46,271		$	137,833		885			32,926
Commercial Banking		285,912		809			122,638			291,776		1,053			143,732
Commercial Real Estate		200,843		222			71,272			223,305		409			117,408
Discretionary Portfolio		134,544		(10,027	)		90,546			49,219		(13,037	)		25,668
Residential Mortgage Banking		153,760		22,183			49,611			125,561		21,417			24,616
Retail Banking		346,917		272			85,358			402,683		267			110,246
All Other		209,114		(14,128	)		(18,447	)		275,788		(10,994	)		(185,774	)
Total	$	1,486,993		—			447,249		$	1,506,165		—			268,822

	Average Total Assets
	Three Months Ended March 31				Year Ended December 31
	2021		2020		2020
	(In millions)
Business Banking	$	8,622		6,006		8,152
Commercial Banking		30,395		29,172		30,338
Commercial Real Estate		26,097		24,849		25,792
Discretionary Portfolio		23,650		27,143		27,726
Residential Mortgage Banking		6,506		3,218		4,038
Retail Banking		17,216		16,002		16,438
All Other		35,671		14,195		22,996
Total	$	148,157		120,585		135,480

(a) Total revenues are comprised of net interest income and other income.  Net interest income is the difference between taxable-equivalent interest earned on assets and interest paid on liabilities owed by a segment and a funding charge (credit) based on the Company's internal funds transfer and allocation methodology.  Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits).  The taxable-equivalent adjustment aggregated $3,733,000 and $5,063,000 for the three-month periods ended March 31, 2021 and 2020, respectively, and is eliminated in "All Other" total revenues.  Intersegment revenues are included in total revenues of the reportable segments.  The elimination of intersegment revenues is included in the determination of "All Other" total revenues.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

15. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

M&T holds a 20% minority interest in Bayview Lending Group LLC ("BLG"), a privately-held commercial mortgage company. That investment had no remaining carrying value at March 31, 2021 as a result of cumulative losses recognized and cash distributions received in prior years.  Cash distributions now received from BLG are recognized as income by M&T and included in other revenues from operations.  That income totaled $23 million for the three-month period ended March 31, 2020. There was no similar cash distribution during the three-month period ended March 31, 2021.

Bayview Financial Holdings, L.P. (together with its affiliates, "Bayview Financial"), a privately-held specialty finance company, is BLG's majority investor.  In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other.  The Company has obtained loan servicing rights for mortgage loans from BLG and Bayview Financial having outstanding principal balances of $1.9 billion at March 31, 2021 and December 31, 2020. Revenues from those servicing rights were $2 million and $3 million for the three-month periods ended March 31, 2021 and 2020, respectively. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances of $69.7 billion and $68.1 billion at March 31, 2021 and December 31, 2020, respectively.  Revenues earned for sub-servicing loans for Bayview Financial were $34 million and $37 million for the three-month periods ended March 31, 2021 and 2020, respectively. In addition, the Company held $73 million and $77 million of mortgage-backed securities in its held-to-maturity portfolio at March 31, 2021 and December 31, 2020, respectively, that were securitized by Bayview Financial. At March 31, 2021, the Company held $139 million of Bayview Financial’s $1.1 billion syndicated loan facility. In the first quarter of 2021, the Company purchased $965 million of delinquent FHA guaranteed mortgage loans, including past due accrued interest, from Bayview Financial for $1.0 billion. The servicing rights for such loans were retained by Bayview Financial, but the Company continues to sub-service the loans.

16. Recent accounting developments

The following table provides a description of accounting standards that were adopted by the Company in 2021 as well as standards that are not effective that could have an impact to M&T’s consolidated financial statements upon adoption.

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Adopted in 2021
Clarifying the Interactions Between Equity Securities, Equity Method and Joint Ventures, and Derivatives and Hedging	The amendments clarify the following guidance: 1. That an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in the equity securities investments guidance immediately before applying or upon discontinuing the equity method of accounting. 2. For the purpose of applying the derivatives and hedging guidance an entity should not consider whether, upon the settlement of a forward contract or exercise of a purchased option, individually or with existing investments, the underlying securities would be accounted for under the equity method of accounting or the fair value option in accordance with the financial instruments guidance. An entity also would evaluate the remaining characteristics in the derivatives and hedging guidance to determine the accounting for those forward contracts and purchased options.	January 1, 2021	The Company adopted the amended guidance effective January 1, 2021 using a prospective transition method. The adoption did not have a material impact on the Company’s consolidated financial statements.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Adopted in 2021
Simplifying the Accounting for Income Taxes	The amendments remove the following exceptions for accounting for income taxes: 1. Exception to the incremental approach for intraperiod tax allocation when there is a loss from continuing operations and income or a gain from other items (for example, discontinued operations or other comprehensive income) 2. Exception to the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment 3. Exception to the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary 4. Exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The amendments also simplify the accounting for income taxes by doing the following: 1. Requiring that an entity recognize a franchise tax (or similar tax) that is partially based on income as an income-based tax and account for any incremental amount incurred as a non-income-based tax.   2. Requiring that an entity evaluate when a step up in the tax basis of goodwill should be considered part of the business combination in which the book goodwill was originally recognized and when it should be considered a separate transaction. 3. Specifying that an entity is not required to allocate the consolidated amount of current and deferred tax expense to a legal entity that is not subject to tax in its separate financial statements. However, an entity may elect to do so (on an entity-by-entity basis) for a legal entity that is both not subject to tax and disregarded by the taxing authority. 4. Requiring that an entity reflect the effect of an enacted change in tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. 5. Making minor Codification improvements for income taxes related to employee stock ownership plans and investments in qualified affordable housing projects accounted for using the equity method.	January 1, 2021	The amendments related to separate financial statements of legal entities that are not subject to tax should be applied on a retrospective basis for all periods presented. The amendments related to changes in ownership of foreign equity method investments or foreign subsidiaries should be applied on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. The amendments related to franchise taxes that are partially based on income should be applied on either a retrospective basis for all periods presented or a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. All other amendments should be applied on a prospective basis. The adoption did not have a material impact on the Company’s consolidated financial statements.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Not Yet Adopted as of March 31, 2021
Changes to Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity	The amendments reduce the number of accounting models for convertible debt instruments and convertible preferred stock.  The amendments also reduce form-over-substance-based guidance for the derivatives scope exception for contacts in an entity’s own equity. For convertible instruments, embedded conversion features no longer are separated from the host contract for convertible instruments with conversion features that are not required to be accounted for as derivatives, or that do not result in substantial premiums accounted for as paid-in capital. Consequently, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost and a convertible preferred stock will be accounted for as a single equity instrument measured at its historical cost, as long as no other features require bifurcation and recognition as derivatives. By removing those separation models, the interest rate of convertible debt instruments typically will be closer to the coupon interest rate on the instrument.  The amendments also require certain changes to EPS calculations for convertible instruments as well as additional disclosures relating to conditions that cause conversion features to be met. For contacts in an entity’s own equity, the amendments  revise the derivatives scope exception guidance as follows: 1. Remove the settlement in unregistered shares, collateral, and shareholder rights conditions from the settlement guidance. 2. Clarify that payment penalties for failure to timely file do not preclude equity classification. 3. Require instruments that are required to be classified as an asset or liability to be measured subsequently at fair value, with changes reported in earnings and disclosed in the financial statements. 4. Clarifiy that the scope of the disclosure requirements in the Contracts in an Entity’s Own Equity section of the Derivatives guidance applies only to freestanding instruments. 5. Clarify that the scope of the reassessment guidance in the Contracts in an Entity’s Own Equity section of the Derivatives guidance applies to both freestanding instruments and embedded features.	January 1, 2022 Early adoption permitted	The amendments can be applied either on a modified retrospective method of transition or a fully retrospective method of transition. In applying the modified retrospective method, the guidance should be applied to transactions outstanding as of the beginning of the fiscal year in which the amendments are adopted. Transactions that were settled (or expired) during prior reporting periods are unaffected. The cumulative effect of the change should be recognized as an adjustment to the opening balance of retained earnings at the date of adoption. If applying the fully retrospective method of transition, the cumulative effect of the change should be recognized as an adjustment to the opening balance of retained earnings in the first comparative period presented. The fair value option is allowed to be irrevocably elected for any financial instrument that is a convertible security upon adoption of the amendments. The Company has not yet decided on which transition method will be applied to the extent applicable. The Company does not expect the guidance will have a material impact on its consolidated financial statements.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Overview

Net income for M&T Bank Corporation (“M&T”) in the first quarter of 2021 was $447 million, compared with $269 million in the corresponding quarter of 2020 and $471 million in the fourth quarter of 2020. Diluted and basic earnings per common share were $3.33 in the recent quarter, $1.93 in the first quarter of 2020 and $3.52 in the fourth quarter of 2020.  The after-tax impact of merger-related expenses was $8 million ($10 million pre-tax), or $.06 of basic and diluted earnings per common share in the recent quarter.  Such expenses were associated with M&T’s pending acquisition of People’s United Financial, Inc. (“People’s United”), headquartered in Bridgeport, Connecticut.  There were no merger-related expenses in the first or fourth quarters of 2020.

The annualized rate of return on average total assets for M&T and its consolidated subsidiaries (“the Company”) in 2021’s first quarter was 1.22%, compared with .90% in the year-earlier quarter and 1.30% in the fourth quarter of 2020. The annualized rate of return on average common shareholders’ equity was 11.57% in the recent quarter,  7.00% in the first quarter of 2020 and 12.07% in the fourth 2020 quarter.

On February 22, 2021, M&T announced that it had entered into a definitive agreement with People’s United under which People’s United will be acquired by M&T in an all-stock transaction.  Pursuant to the terms of the agreement, People’s United shareholders will receive consideration valued at .118 of an M&T share in the form of M&T common stock. People’s United outstanding preferred stock will be converted to a new series of M&T preferred stock upon completion of the acquisition. The transaction is valued at approximately $7.7 billion (with the price based on M&T’s closing price of $151.61 per share as of March 31, 2021).

As of March 31, 2021, People’s United reported $64.2 billion of assets, including $42.8 billion of loans and $10.4 billion of investment securities, $56.6 billion of liabilities, including $53.5 billion of deposits, and $7.6 billion of stockholders’ equity. The merger is subject to a number of conditions, including regulatory approvals and approval by common shareholders of M&T and People’s United, and is expected to be completed during the fourth quarter of 2021.

Financial results since the first quarter of 2020 were adversely impacted by the Coronavirus Disease 2019 (“COVID-19”) pandemic. Large portions of the U.S. economy were substantially curtailed for extended periods of time and, as a result, many commercial and consumer customers were adversely impacted. Specifically, those adverse economic impacts resulted in the Company recognizing elevated levels of  provisions for credit losses during 2020 that reflected projections of credit losses based on macroeconomic forecasts at the end of each quarter of that year.  The Company recorded provisions for credit losses of $250 million in the first 2020 quarter and $75 million in the fourth quarter of 2020. An improvement in economic conditions and forecasts at March 31, 2021 as compared with previous forecasts led the Company to recognize a provision recapture of $25 million in the first quarter of 2021.  In response to the pandemic, the Federal Reserve took actions to lower interest rates that have negatively affected the Company’s net interest income since the beginning of the pandemic. Taxable-equivalent net interest income totaled $985 million in the recent quarter and $982 million and $993 million in the first and fourth quarters of 2020, respectively.  

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was signed into law. The CARES Act  and applicable extensions provide relief to borrowers, including the opportunity to defer loan payments while not negatively affecting their credit standing, and also provide funding opportunities for small businesses under the Paycheck Protection Program (“PPP”) from approved Small Business Administration (“SBA”) lenders, including M&T Bank, the principal bank subsidiary of M&T. For commercial and consumer customers, the Company has provided a host of relief options, including payment deferrals (including maturity extensions), loan covenant waivers and low interest rate loan products.  M&T Bank funded approximately $7.0 billion of PPP loans during 2020 and another $2.5 billion during the first quarter of 2021.  PPP loans outstanding at March 31, 2021 and December 31, 2020 totaled $6.2 billion and $5.4 billion, respectively.

Updated economic forecasts at the end of each of the quarters of 2020 resulted in higher estimates of expected credit losses in the Company’s loan portfolio than at January 1, 2020, when the Company adopted amended

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accounting guidance for the measurement of credit losses on financial instruments, resulting in historically high levels of the provision for credit losses. Specifically, the level of the provision in 2020 reflected the ongoing impacts of the pandemic on economic activity in the hospitality and retail sectors, the uncertainty at December 31, 2020 as to the sufficiency and effectiveness of economic stimulus provided by the U.S. government to the economy, and concerns about ultimate collectability of real estate loans where borrowers requested re-payment forbearance.  Improvement in the economic outlook at March 31, 2021 resulted in reduced estimates of expected credit losses.  However, the Company expects that it will continue to be negatively impacted by the COVID-19 pandemic after March 31, 2021.

The national effort to mitigate the pandemic has resulted in a challenging environment for businesses and their employees.  The Company has taken actions designed to help provide a safe environment for its customers and employees and to provide relief to customers in a variety of ways.  Examples of those actions include:

• The deployment of a Pandemic Response Plan to manage the pandemic’s effects on operations, employees and customers, including seeking to ensure employee safety, maintaining continuity of operations and service levels for customers, preserving the Company’s financial strength, and complying with applicable laws and regulations.  Actions have included placing restrictions on travel, implementing social distancing, health screening, sanitation and other protocols, and mandating for all employees whose jobs can be performed remotely to work from home where possible.  The Company continues to assess the appropriateness of employees returning to the office while seeking to ensure a safe work environment;

• Nearly all M&T Bank branches remain open, with open lobbies and normal access to drive-through windows and ATMs;

• The vast majority of the Company’s non-branch employees continue to work remotely;

• Many loan customers are still receiving COVID-19 related relief in various forms, including modification and forbearance requests as of March 31, 2021 as described herein and in note 4 of Notes to Financial Statements.

Supplemental Reporting of Non-GAAP Results of Operations

M&T consistently provides supplemental reporting of its results on a “net operating” or “tangible” basis, from which M&T excludes the after-tax effect of amortization of core deposit and other intangible assets (and the related goodwill, core deposit intangible and other intangible asset balances, net of applicable deferred tax amounts) and gains (when realized) and expenses (when incurred) associated with merging acquired operations  into the Company, since such items are considered by management to be “nonoperating” in nature.  Although “net operating income” as defined by M&T is not a GAAP measure, M&T’s management believes that this information helps investors understand the effect of acquisition activity in reported results.

Net operating income totaled $457 million in the first quarter of 2021, compared with $272 million in the year-earlier quarter.  Diluted net operating earnings per common share in the first quarters of 2021 and 2020 were $3.41 and $1.95, respectively. Net operating income and diluted net operating earnings per common share were $473 million and $3.54, respectively, in the fourth quarter of 2020.

Net operating income in the recent quarter expressed as an annualized rate of return on average tangible assets was 1.29%, compared with .94% in the first quarter of 2020 and 1.35% in the 2020’s fourth quarter. Net operating income represented an annualized return on average tangible common equity of 17.05% in the first quarter of 2021,  10.39% in the year-earlier quarter and 17.53% in the fourth quarter of 2020.

Reconciliations of GAAP amounts with corresponding non-GAAP amounts are provided in table 2.

Taxable-equivalent Net Interest Income

Taxable-equivalent net interest income was $985 million in the first quarter of 2021, compared with $982 million in the first quarter of 2020. That modest increase resulted from the impact of a $26.1 billion or 24% increase in average earning assets that was substantially offset by a 68 basis point (hundredths of one percent) narrowing of the net interest margin, or taxable-equivalent net interest income expressed as an annualized percentage of average earning assets, to 2.97% in the recent quarter from 3.65% in the year-earlier quarter. The higher average earning assets

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reflected growth in deposits at the Federal Reserve Bank of New York and loans, partially offset by a decline in average investment securities balances. The narrowing of the net interest margin was largely the result of declines in rates earned on loans and deposits at the Federal Reserve Bank of New York, reflecting the lower interest rate environment due to actions initiated by the Federal Reserve to decrease its target Federal funds rate twice in March of 2020 (first by .50%, than another by 1.0%). Taxable-equivalent net interest income in the recent quarter declined $8 million from the fourth quarter of 2020 reflecting the fewer number of days in the first quarter of 2021.  A three basis point narrowing of the net interest margin in the recent quarter from 3.00% in the prior quarter largely attributable to higher balances held in low yielding accounts at the Federal Reserve Bank of New York was predominantly offset by a $2.4 billion or 2% rise in average earning assets.  

Average loans and leases totaled $99.4 billion in the first quarter of 2021, up $7.7 billion or 8% from $91.7 billion in the similar quarter of 2020.  Commercial loans and leases averaged $27.7 billion in the first quarter of 2021, $3.4 billion or 14% higher than in the year-earlier quarter.  That increase was the result of average outstanding PPP loans of $5.7 billion in the recent quarter that were predominantly funded in the second quarter of 2020 and in the first quarter of 2021. Average commercial real estate loans were $37.6 billion in the recent quarter, up $1.6 billion, or 4%, from $36.0 billion in the corresponding 2020 quarter.  Included in average commercial real estate loans in the first quarters of 2021 and 2020 were loans held for sale of $258 million and $185 million, respectively.  Reflecting purchases of government-guaranteed loans from Ginnie Mae pools that were serviced by the Company, average residential real estate loans rose $1.5 billion or 9% to $17.4 billion in the first quarter of 2021 from $15.9 billion in the year-earlier quarter. The loans purchased from Ginnie Mae pools averaged $3.8 billion in the recent quarter, compared with $800 million in the year-earlier quarter. Loans are purchased to reduce associated servicing costs, namely a requirement to advance principal and interest payments that had not been received from individual mortgagors, including payments deferred under COVID-19 forbearance arrangements. Loans purchased from Ginnie Mae pools totaled $1.3 billion in the recent quarter and $2.5 billion in the last three quarters of 2020. Also included in average residential real estate loans were loans held for sale of $663 million in the recent quarter and $409 million in the first quarter of 2020.  Consumer loans averaged $16.6 billion in the first quarter of 2021, up $1.2 billion, or 8%, from $15.5 billion in the year-earlier quarter, due to growth in average recreational finance loans (consisting predominantly of loans secured by recreational vehicles and boats) and, to a lesser extent, automobile loans that was partially offset by declines in outstanding balances of home equity loans and lines of credit.

Average loan and lease balances in the first quarter of 2021 increased $690 million from $98.7 billion in the fourth quarter of 2020.  Commercial loan and lease average balances in the recent quarter were little changed from the fourth quarter of 2020, as higher loans to motor vehicle and recreational finance dealers were offset by lower average PPP loans. Average commercial real estate loans in the first quarter of 2021 declined $98 million from $37.7 billion in the fourth quarter of 2020.  Commercial real estate loans held for sale averaged $307 million in the fourth quarter of 2020.  Average balances of residential real estate loans in the recently completed quarter rose $643 million, or 4%, from $16.8 billion in 2020’s fourth quarter, predominantly reflecting a higher level of repurchases of government-guaranteed loans. Purchased government-guaranteed loans averaged $2.6 billion in 2020’s fourth quarter.  Residential real estate loans held for sale averaged $645 million in the fourth quarter of 2020.  Average consumer loans in the recent quarter increased $136 million, or 1%, from $16.5 billion in 2020’s fourth quarter, reflecting growth in recreational finance and automobile loans.  The accompanying table summarizes quarterly changes in the major components of the loan and lease portfolio.

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AVERAGE LOANS AND LEASES

(net of unearned discount)

			Percent Increase
			(Decrease) from
	1st Qtr.		1st Qtr.				4th Qtr.
	2021		2020				2020
	(In millions)
Commercial, financial, etc.	$	27,723		14		%		—		%
Real estate — commercial		37,609		4				—
Real estate — consumer		17,404		9				4
Consumer
Recreational finance		7,176		27				2
Automobile		4,177		6				4
Home equity lines and loans		3,896		(12	)			(4	)
Other		1,371		(5	)			(1	)
Total consumer		16,620		8				1
Total	$	99,356		8		%		1		%

The investment securities portfolio averaged $6.6 billion in the first quarter of 2021, down $2.5 billion, or 27%, from $9.1 billion in the year-earlier quarter and $590 million lower than the $7.2 billion averaged in the fourth quarter of 2020.  The lower average balance in the recent quarter as compared with the first and fourth quarters of 2020 predominantly reflects pay downs of mortgage-backed securities.  The Company purchased $200 million of fixed rate residential mortgage-backed securities in March 2021.  There were no other significant purchases and there were no significant sales of investment securities during three-month periods ended March 31, 2021, March 31, 2020 or December 31, 2020. The Company routinely has increases and decreases in its holdings of capital stock of the Federal Home Loan Bank (“FHLB”) of New York and the Federal Reserve Bank of New York.  Those holdings are accounted for at cost and are adjusted based on amounts of outstanding borrowings and available lines of credit with those entities.

The investment securities portfolio is largely comprised of residential mortgage-backed securities and shorter-term U.S. Treasury and federal agency notes.  When purchasing investment securities, the Company considers its liquidity position and its overall interest-rate risk profile as well as the adequacy of expected returns relative to risks assumed, including prepayments. The Company may occasionally sell investment securities as a result of changes in interest rates and spreads, actual or anticipated prepayments, credit risk associated with a particular security, or as a result of restructuring its investment securities portfolio in connection with a business combination. The amounts of investment securities held by the Company are influenced by such factors as available yield in comparison with alternative investments, demand for loans, which generally yield more than investment securities, ongoing repayments, the levels of deposits, and management of liquidity and balance sheet size and resulting capital ratios.

Fair value changes in equity securities with readily determinable fair values are recognized in the consolidated statement of income.  Net unrealized losses on such equity securities were $12 million and $21 million in the first quarters of 2021 and 2020, respectively, compared with net unrealized gains of $2 million in the final quarter of 2020. Those gains and losses were predominantly related to the Company’s holdings of Fannie Mae and Freddie Mac preferred stock.  

The Company regularly reviews its debt investment securities for declines in value below amortized cost that might be indicative of credit-related losses. In light of such reviews, there were no credit-related losses on debt investment securities recognized in either of the first quarters of 2021 or 2020 or in the final 2020 quarter. Based on management’s assessment of future cash flows associated with individual investment securities as of March 31, 2021, the Company did not expect to incur any material credit-related losses in its portfolios of debt investment securities. Additional information about the investment securities portfolio is included in notes 3 and 12 of Notes to Financial Statements.

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Other earning assets include interest-bearing deposits at the Federal Reserve Bank of New York and other banks, trading account assets, federal funds sold and agreements to resell securities.  Those other earning assets in the aggregate averaged $28.4 billion in the recently completed quarter, compared with $7.4 billion in the first quarter of 2020 and $26.1 billion in the final quarter of 2020.  Interest-bearing deposits at banks averaged $27.7 billion, $6.1 billion and $22.2 billion during the three months ended March 31, 2021, March 31, 2020 and December 31, 2020, respectively.  The amounts of interest-bearing deposits at banks at the respective dates were predominantly comprised of deposits held at the Federal Reserve Bank of New York.  The levels of those deposits often fluctuate due to changes in trust-related deposits of commercial entities, purchases or maturities of investment securities, or borrowings to manage the Company’s liquidity.  The higher balances in the two most recent quarters compared with the year-earlier period reflect increased commercial and consumer deposit balances.  Agreements to resell securities averaged $678 million, $1.2 billion and $3.8 billion for the quarters ended March 31, 2021, March 31, 2020 and December 31, 2020, respectively.

As a result of the changes described herein, average earning assets totaled $134.4 billion in the most recent quarter, compared with $108.2 billion and $131.9 billion in the first and fourth quarters of 2020, respectively.

The most significant source of funding for the Company is core deposits.  The Company considers noninterest-bearing deposits, interest-bearing transaction accounts, savings deposits and time deposits of $250,000 or less as core deposits.  The Company’s branch network is its principal source of core deposits, which generally carry lower interest rates than wholesale funds of comparable maturities.  Average core deposits totaled $120.2 billion in the first quarter of 2021, up 32% from $90.9 billion in the similar 2020 quarter. The increase in average core deposits in the recent quarter as compared with the first quarter of 2020 reflected higher balances of noninterest-bearing deposits and savings and interest-checking deposits. Average balances of savings and interest-checking core deposits rose $12.4 billion or 23% to $66.0 billion in the first 2021 quarter from $53.6 billion in the year-earlier quarter.  Average noninterest-bearing deposits increased $18.4 billion or 57% to $50.9 billion in the recent quarter from $32.5 billion in the first 2020 quarter. Those increases were largely due to higher average deposits of commercial customers, but also reflect higher levels of consumer deposits and deposits associated with residential mortgage servicing activities. Average core deposits were $115.2 billion in the fourth quarter of 2020. Average savings and interest-checking core deposits increased $1.4 billion or 2% in the first 2021 quarter from $64.7 billion in the immediately preceding quarter. Average noninterest-bearing deposits in the recent quarter were $4.0 billion or 8% higher than the fourth quarter 2020 average of $46.9 billion, reflecting higher levels of liquidity being maintained by many commercial and consumer customers. The following table provides an analysis of quarterly changes in the components of average core deposits.  

AVERAGE CORE DEPOSITS

			Percent Increase
			(Decrease) from
	1st Qtr.		1st Qtr.				4th Qtr.
	2021		2020				2020
	(In millions)
Savings and interest-checking deposits	$	66,036		23		%		2		%
Time deposits		3,256		(32	)			(9	)
Noninterest-bearing deposits		50,860		57				8
Total	$	120,152		32		%		4		%

The Company also receives funding from other deposit sources, including branch-related time deposits over $250,000, deposits associated with the Company’s Cayman Islands office and brokered deposits.  Time deposits over $250,000, excluding brokered deposits, averaged $477 million in the recent quarter, compared with $872 million in the first quarter of 2020 and $521 million in the fourth 2020 quarter. The decreases in such deposits since the first quarter of 2020 were predominantly the result of maturities of higher-rate time deposits. Cayman Islands office deposits averaged $683 million for the quarter ended March 31, 2021, compared with $1.7 billion for the quarter ended March 31, 2020 and $826 million for the quarter ended December 31, 2020. The decreases in such deposits in

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the two most recent quarters as compared with the first quarter of 2020 reflect customer reaction to the declines in short-term interest rates that followed actions by the Federal Reserve in March 2020. The Company had brokered savings and interest-bearing transaction accounts, which in the aggregate averaged $4.4 billion during each of the recent quarter and the fourth quarter of 2020, compared with $2.7 billion in the first quarter of 2020.  

The table below summarizes average total deposits for the quarters ended March 31, 2021, December 31, 2020 and March 31, 2020.

AVERAGE DEPOSITS

	Retail		Trust		Commercial and Other		Total
	(In millions)
Three Months Ended March 31, 2021
Savings and interest-checking deposits	$	32,499	$	5,747	$	32,212	$	70,458
Time deposits		3,492		44		196		3,732
Noninterest-bearing deposits		7,845		7,032		35,983		50,860
Deposits at Cayman Islands office		—		—		683		683
Total	$	43,836	$	12,823	$	69,074	$	125,733
Three Months Ended December 31, 2020
Savings and interest-checking deposits	$	30,882	$	5,432	$	32,819	$	69,133
Time deposits		3,870		46		197		4,113
Noninterest-bearing deposits		7,165		6,442		33,297		46,904
Deposits at Cayman Islands office		—		—		826		826
Total	$	41,917	$	11,920	$	67,139	$	120,976
Three Months Ended March 31, 2020
Savings and interest-checking deposits	$	26,920	$	6,181	$	23,265	$	56,366
Time deposits		5,265		52		355		5,672
Noninterest-bearing deposits		5,661		5,080		21,715		32,456
Deposits at Cayman Islands office		—		—		1,672		1,672
Total	$	37,846	$	11,313	$	47,007	$	96,166

The Company also uses borrowings from banks, securities dealers, various Federal Home Loan Banks, the Federal Reserve Bank of New York and others as sources of funding.  Short-term borrowings represent borrowing arrangements that at the time they were entered into had a contractual maturity of one year or less. Average short-term borrowings totaled $62 million in the first quarter of 2021, compared with $58 million in the year-earlier quarter and $64 million in the fourth quarter of 2020.

Long-term borrowings averaged $3.9 billion in the recent quarter, compared $6.2 billion in the first quarter of 2020 and $5.3 billion in the fourth quarter of 2020. Average balances of outstanding senior notes were $2.5 billion, $4.2 billion and $3.4 billion during the three months ended March 31, 2021, March 31, 2020 and December 31, 2020, respectively. In July 2020, M&T Bank redeemed $750 million of fixed rate senior notes and in December  2020, redeemed $650 million of fixed rate senior notes that were due to mature on January 25, 2021.  In addition, in January 2021, $350 million of variable rate senior notes matured.  Subordinated capital notes included in long-term borrowings averaged $828 million in the three-month period ended March 31, 2021 and $1.4 billion in each of the three-month periods ended March 31, 2020 and December 31, 2020.  On March 1, 2021, M&T Bank redeemed $500 million of subordinated capital notes that were due to mature on December 1, 2021, and during December 2020, $409 million of subordinated capital notes matured. Junior subordinated debentures associated with trust preferred securities that were included in average long-term borrowings were $529 million, $525 million and $528 million during the first quarters of 2021 and 2020 and the final 2020 quarter, respectively. Additional information regarding junior subordinated debentures is provided in note 5 of Notes to Financial Statements.

The Company has utilized interest rate swap agreements to modify the repricing characteristics of certain components of its loans and long-term debt.  As of March 31, 2021, interest rate swap agreements were used as fair

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value hedges of approximately $1.65 billion of outstanding fixed rate long-term borrowings.  Additionally, interest rate swap agreements with a notional amount of $17.35 billion were used as cash flow hedges of interest payments associated with variable rate commercial real estate loans.  Further information on interest rate swap agreements is provided herein and in note 10 of Notes to Financial Statements.  

Changes in the composition of the Company’s earning assets and interest-bearing liabilities, as discussed herein, as well as changes in interest rates and spreads, can impact net interest income.  Net interest spread, or the difference between the taxable-equivalent yield on earning assets and the rate paid on interest-bearing liabilities, was 2.90% in the recent quarter, compared with 3.35% in the initial 2020 quarter.  The yield on earning assets during the first three months of 2021 was 3.08%, down 110 basis points from 4.18% in the similar 2020 period, while the rate paid on interest-bearing liabilities declined 65 basis points to .18% in the recent quarter from .83% in the year-earlier period.  In the fourth quarter of 2020, the net interest spread was also 2.90%, the yield on earning assets was 3.15% and the rate paid on interest-bearing liabilities was .25%. The narrowing of the net interest spread in the two most recent quarters as compared with the initial quarter of 2020 period reflects the decreases in short-term interest rates initiated by the Federal Reserve during March 2020.

Net interest-free funds consist largely of noninterest-bearing demand deposits and shareholders’ equity, partially offset by bank owned life insurance and non-earning assets, including goodwill and core deposit and other intangible assets.  Net interest-free funds averaged $55.6 billion in the first quarter of 2021, compared with $38.2 billion in the year-earlier quarter and $52.5 billion in the fourth 2020 quarter.  The increase in average net interest-free funds in the two most recent quarters as compared with the initial 2020 quarter reflects higher average balances of noninterest-bearing deposits. Shareholders’ equity averaged $16.3 billion during the three-month period ended March 31, 2021, $15.7 billion during the year-earlier period and $16.2 billion during the three-month period ended December 31, 2020.  Goodwill and core deposit and other intangible assets averaged $4.6 billion in each of the quarters noted herein. The cash surrender value of bank owned life insurance averaged $1.9 billion in the three-month period ended March 31, 2021 and $1.8 billion in each of the three-month periods ended March 31, 2020 and December 31, 2020. Increases in the cash surrender value of bank owned life insurance and benefits received are not included in interest income, but rather are recorded in “other revenues from operations.”  The contribution of net interest-free funds to net interest margin was .07% in the first quarter of 2021, compared with .30% and .10% in the first quarter of 2020 and the fourth quarter of 2020, respectively. The reduced contribution of net interest-free funds to net interest margin in the two most recent quarters as compared with the first quarter of 2020 reflects the lower rates on interest-bearing liabilities used to value net interest-free funds.  

Reflecting the changes to the net interest spread and the contribution of net interest-free funds as described herein, the Company’s net interest margin was 2.97% in the first quarter of 2021, compared with 3.65% in the year-earlier period and 3.00% in the fourth quarter of 2020.  Future changes in market interest rates or spreads, as well as changes in the composition of the Company’s portfolios of earning assets and interest-bearing liabilities that result in reductions in spreads, could adversely impact the Company’s net interest income and net interest margin.

Management assesses the potential impact of future changes in interest rates and spreads by projecting net interest income under several interest rate scenarios. In managing interest rate risk, the Company has utilized interest rate swap agreements to modify the repricing characteristics of certain portions of its earning assets and interest-bearing liabilities.  Periodic settlement amounts arising from these agreements are reflected in either the yields on earning assets or the rates paid on interest-bearing liabilities.  The notional amount of interest rate swap agreements entered into for interest rate risk management purposes was $19.0 billion (excluding $18.7 billion of forward-starting swap agreements) at March 31, 2021, $16.4 billion (excluding $41.8 billion of forward-starting swap agreements) at March 31, 2020 and $19.0 billion (excluding $32.1 billion of forward-starting swap agreements) at December 31, 2020. Under the terms of those interest rate swap agreements, the Company received payments based on the outstanding notional amount at fixed rates and made payments at variable rates. At each of March 31, 2021 and December 31, 2020, interest rate swap agreements with notional amounts of $17.35 billion were serving as cash flow hedges of interest payments associated with variable rate commercial real estate loans, compared with $13.35 billion at March 31, 2020.  Interest rate swap agreements with notional amounts of $1.65 billion at each of March 31, 2021 and December 31, 2020 and $3.05 billion at March 31, 2020 were serving as fair value hedges of fixed rate long-

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term borrowings. The Company has entered into forward-starting interest rate swap agreements predominantly to extend the term of its interest rate swap agreements serving as cash flow hedges, and provide a hedge against changing interest rates on certain of its variable rate loans.

In a fair value hedge, the fair value of the derivative (the interest rate swap agreement) and changes in the fair value of the hedged item are recorded in the Company’s consolidated balance sheet with the corresponding gain or loss recognized in current earnings.  The difference between changes in the fair value of the interest rate swap agreements and the hedged items represents hedge ineffectiveness and is recorded as an adjustment to the interest income or interest expense of the respective hedged item.  In a cash flow hedge, the effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings.  The ineffective portion of the derivative’s gain or loss on cash flow hedges is accounted for similar to that associated with fair value hedges.  The amounts of hedge ineffectiveness recognized during each of the quarters ended March 31, 2021, March 31, 2020 and December 31, 2020 were not material to the Company’s consolidated results of operations.  Information regarding the fair value of interest rate swap agreements and hedge ineffectiveness is presented in note 10 of Notes to Financial Statements. Information regarding the effective portion of cash flow hedges is presented in note 9 of Notes to Financial Statements.  The changes in the fair values of the interest rate swap agreements and the hedged items primarily result from the effects of changing interest rates and spreads.  

The weighted-average rates to be received and paid under interest rate swap agreements currently in effect were 1.89% and .17%, respectively, at March 31, 2021.  The average notional amounts of interest rate swap agreements entered into for interest rate risk management purposes, the related effect on net interest income and margin, and the weighted-average interest rates paid or received on those swap agreements are presented in the accompanying table.  Additional information about the Company’s use of interest rate swap agreements and other derivatives is included in note 10 of Notes to Financial Statements.

INTEREST RATE SWAP AGREEMENTS

	Three Months Ended March 31
.	2021							2020
	Amount			Rate(a)				Amount			Rate(a)
	(Dollars in thousands)
Increase (decrease) in:
Interest income	$	82,044			.25		%	$	32,041			.12		%
Interest expense		(8,647	)		(.04	)			(3,765	)		(.02	)
Net interest income/margin	$	90,691			.27		%	$	35,806			.13		%
Average notional amount (c)	$	18,822,222						$	16,650,549
Rate received (b)					2.14		%					2.51		%
Rate paid (b)					.21		%					1.66		%

(a) Computed as an annualized percentage of average earning assets or interest-bearing liabilities.

(b) Weighted-average rate paid or received on interest rate swap agreements in effect during the period.

(c)     Excludes forward-starting interest rate swap agreements not in effect during the period.

As a financial intermediary, the Company is exposed to various risks, including liquidity and market risk.  Liquidity refers to the Company’s ability to ensure that sufficient cash flow and liquid assets are available to satisfy current and future obligations, including demands for loans and deposit withdrawals, funding operating costs, and other corporate purposes.  Liquidity risk arises whenever the maturities of financial instruments included in assets and liabilities differ.

The most significant source of funding for the Company is core deposits, which are generated from a large base of consumer, corporate and institutional customers. That customer base has, over the past several years, become more geographically diverse as a result of expansion of the Company’s businesses. Nevertheless, the Company faces competition in offering products and services from a large array of financial market participants, including banks, thrifts, mutual funds, securities dealers and others.  The Company supplements funding provided through deposits

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with various short-term and long-term wholesale borrowings, including overnight federal funds purchased, short-term advances from the FHLB of New York, brokered deposits, and longer-term borrowings.  M&T Bank has access to additional funding sources through borrowings from the FHLB of New York, lines of credit with the Federal Reserve Bank of New York, M&T Bank’s Bank Note Program, and other available borrowing facilities.  The Bank Note Program enables M&T Bank to offer unsecured senior and subordinated notes.  The Company has, from time to time, also issued subordinated capital notes and junior subordinated debentures associated with trust preferred securities to provide liquidity and enhance regulatory capital ratios.  The Company’s junior subordinated debentures associated with trust preferred securities and other subordinated capital notes are considered Tier 2 capital and are includable in total regulatory capital.  At March 31, 2021 and December 31, 2020, long-term borrowings aggregated $3.5 billion and $4.4 billion, respectively.

Cayman Islands office deposits have been used by some customers of the Company as an alternative to other deposit and investment products.  Cayman Islands office deposits totaled $642 million at March 31, 2021, $1.2 billion at March 31, 2020 and $652 million at December 31, 2020. The Company has also benefited from the placement of brokered deposits.  The Company had brokered savings and interest-bearing checking deposit accounts which aggregated approximately $4.4 billion at March 31, 2021, $3.1 billion at March 31, 2020 and $4.5 billion at December 31, 2020.  Brokered time deposits were not a significant source of funding as of those dates.

The Company’s ability to obtain funding from these sources could be negatively impacted should the Company experience a substantial deterioration in its financial condition or its debt ratings, or should the availability of funding become restricted due to a disruption in the financial markets.  The Company attempts to quantify such credit-event risk by modeling scenarios that estimate the liquidity impact resulting from a short-term ratings downgrade over various grading levels.  Such impact is estimated by attempting to measure the effect on available unsecured lines of credit, available capacity from secured borrowing sources and securitizable assets.  In addition to deposits and borrowings, other sources of liquidity include maturities of investment securities and other earning assets, repayments of loans and investment securities, and cash generated from operations, such as fees collected for services.

Certain customers of the Company obtain financing through the issuance of variable rate demand bonds (“VRDBs”).  The VRDBs are generally enhanced by letters of credit provided by M&T Bank. M&T Bank oftentimes acts as remarketing agent for the VRDBs and, at its discretion, may from time-to-time own some of the VRDBs while such instruments are remarketed.  When this occurs, the VRDBs are classified as trading account assets in the Company’s consolidated balance sheet.  Nevertheless, M&T Bank is not contractually obligated to purchase the VRDBs.  The value of VRDBs in the Company’s trading account was not material at March 31, 2021 or December 31, 2020.  The total amounts of VRDBs outstanding backed by M&T Bank letters of credit were $725 million at each of March 31, 2021 and December 31, 2020, compared with $850 million at March 31, 2020. M&T Bank also serves as remarketing agent for most of those bonds.

The Company enters into contractual obligations in the normal course of business that require future cash payments.  Such obligations include, among others, payments related to deposits, borrowings, leases and other contractual commitments.  Off-balance sheet commitments to customers may impact liquidity, including commitments to extend credit, standby letters of credit, commercial letters of credit, financial guarantees and indemnification contracts, and commitments to sell real estate loans.  Because many of these commitments or contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.  Further discussion of these commitments is provided in note 13 of Notes to Financial Statements.

M&T’s primary source of funds to pay for operating expenses, shareholder dividends and treasury stock repurchases has historically been the receipt of dividends from its bank subsidiaries, which are subject to various regulatory limitations.  Dividends from any bank subsidiary to M&T are limited by the amount of earnings of the subsidiary in the current year and the two preceding years.  For purposes of that test, at March 31, 2021 approximately $969 million was available for payment of dividends to M&T from bank subsidiaries.  M&T also may obtain funding through long-term borrowings.  Outstanding senior notes of M&T at March 31, 2021 and December 31, 2020 were $779 million and $783 million, respectively.  Junior subordinated debentures of M&T associated with

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trust preferred securities outstanding at March 31, 2021 and December 31, 2020 totaled $529 million and $528 million, respectively.  

Management closely monitors the Company’s liquidity position on an ongoing basis for compliance with internal policies and believes that available sources of liquidity are adequate to meet funding needs anticipated in the ordinary course of business.  Management does not anticipate engaging in any activities, either currently or in the long-term, for which adequate funding would not be available and would therefore result in a significant strain on liquidity at either M&T or its subsidiary banks.

Market risk is the risk of loss from adverse changes in the market prices and/or interest rates of the Company’s financial instruments.  The primary market risk the Company is exposed to is interest rate risk.  Interest rate risk arises from the Company’s core banking activities of lending and deposit-taking, because assets and liabilities reprice at different times and by different amounts as interest rates change.  As a result, net interest income earned by the Company is subject to the effects of changing interest rates.  The Company measures interest rate risk by calculating the variability of net interest income in future periods under various interest rate scenarios using projected balances for earning assets, interest-bearing liabilities and derivatives used to manage interest rate risk.  Management’s philosophy toward interest rate risk management is to limit the variability of net interest income.  The balances of financial instruments used in the projections are based on expected growth from forecasted business opportunities, anticipated prepayments of loans and investment securities, and expected maturities of investment securities, loans and deposits.  Management uses a “value of equity” model to supplement the modeling technique described above.  Those supplemental analyses are based on discounted cash flows associated with on- and off-balance sheet financial instruments.  Such analyses are modeled to reflect changes in interest rates and provide management with a long-term interest rate risk metric.  The Company has entered into interest rate swap agreements to help manage exposure to interest rate risk.  At March 31, 2021, the aggregate notional amount of interest rate swap agreements entered into for risk management purposes that were currently in effect was $19.0 billion.  In addition, the Company has entered into $18.7 billion of forward-starting interest rate swap agreements.

The Company’s Asset-Liability Committee, which includes members of senior management, monitors the sensitivity of the Company’s net interest income to changes in interest rates with the aid of a computer model that forecasts net interest income under different interest rate scenarios.  In modeling changing interest rates, the Company considers different yield curve shapes that consider both parallel (that is, simultaneous changes in interest rates at each point on the yield curve) and non-parallel (that is, allowing interest rates at points on the yield curve to vary by different amounts) shifts in the yield curve.  In utilizing the model, market-implied forward interest rates over the subsequent twelve months are generally used to determine a base interest rate scenario for the net interest income simulation.  That calculated base net interest income is then compared to the income calculated under the varying interest rate scenarios.  The model considers the impact of ongoing lending and deposit-gathering activities, as well as interrelationships in the magnitude and timing of the repricing of financial instruments, including the effect of changing interest rates on expected prepayments and maturities.  When deemed prudent, management has taken actions to mitigate exposure to interest rate risk through the use of on- or off-balance sheet financial instruments and intends to do so in the future.  Possible actions include, but are not limited to, changes in the pricing of loan and deposit products, modifying the composition of earning assets and interest-bearing liabilities, and adding to, modifying or terminating existing interest rate swap agreements or other financial instruments used for interest rate risk management purposes.

The accompanying table as of March 31, 2021 and December 31, 2020 displays the estimated impact on net interest income in the base scenario described above resulting from parallel changes in interest rates across repricing categories during the first modeling year.

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SENSITIVITY OF NET INTEREST INCOME

TO CHANGES IN INTEREST RATES

	Calculated Increase (Decrease) in Projected Net Interest Income
Changes in interest rates	March 31, 2021			December 31, 2020
	(In thousands)
+200 basis points	$	355,300			324,684
+100 basis points		198,399			182,661
-100 basis points		(73,650	)		(61,792	)

The Company utilized many assumptions to calculate the impact that changes in interest rates may have on net interest income.  The more significant of those assumptions included the rate of prepayments of mortgage-related assets, cash flows from derivative and other financial instruments held for non-trading purposes, loan and deposit volumes and pricing, and deposit maturities.  In the scenarios presented, the Company also assumed gradual changes in interest rates during a twelve-month period as compared with the base scenario.  In the declining rate scenario, the rate changes may be limited to lesser amounts such that interest rates remain at or above zero on all points of the yield curve.  The assumptions used in interest rate sensitivity modeling are inherently uncertain and, as a result, the Company cannot precisely predict the impact of changes in interest rates on net interest income.  Actual results may differ significantly from those presented due to the timing, magnitude and frequency of changes in interest rates and changes in market conditions and interest rate differentials (spreads) between maturity/repricing categories, as well as any actions, such as those previously described, which management may take to counter such changes.

Changes in fair value of the Company’s financial instruments can also result from a lack of trading activity for similar instruments in the financial markets.  That impact is most notable on the values assigned to some of the Company’s investment securities.  Information about the fair valuation of investment securities is presented in notes 3 and 12 of Notes to Financial Statements.

The Company engages in limited trading account activities to meet the financial needs of customers and to fund the Company’s obligations under certain deferred compensation plans.  Financial instruments utilized for trading account activities consist predominantly of interest rate contracts, such as interest rate swap agreements, and forward and futures contracts related to foreign currencies.  The Company generally mitigates the foreign currency and interest rate risk associated with trading account activities by entering into offsetting trading positions that are also included in the trading account.  The fair values of trading account positions associated with interest rate contracts and foreign currency and other option and futures contracts are presented in note 10 of Notes to Financial Statements.  The amounts of gross and net trading account positions, as well as the type of trading account activities conducted by the Company, are subject to a well-defined series of potential loss exposure limits established by management and approved by M&T’s Board of Directors.  However, as with any non-government guaranteed financial instrument, the Company is exposed to credit risk associated with counterparties to the Company’s trading account activities.

The notional amounts of interest rate contracts entered into for trading account purposes totaled $36.2 billion at March 31, 2021, $36.7 billion at March 31, 2020 and $37.8 billion at December 31, 2020. The notional amounts of foreign currency and other option and futures contracts entered into for trading account purposes were $910 million at March 31, 2021, compared with $928 million at March 31, 2020 and $776 million at December 31, 2020.  Although the notional amounts of these contracts are not recorded in the consolidated balance sheet, the unsettled fair values of all financial instruments used for trading account activities are recorded in the consolidated balance sheet.  The fair values of all trading account assets and liabilities recognized on the balance sheet were $687 million and $95 million, respectively, at March 31, 2021 and $1.1 billion and $117 million, respectively, at December 31, 2020.  The fair value asset and liability amounts at March 31, 2021 have been reduced by contractual settlements of $55 million and $502 million, respectively, and at December 31, 2020 have been reduced by contractual settlements of $6 million and $806 million, respectively. The lower balance of trading account assets at March 31, 2021 as compared with December 31, 2020 was largely the result of decreased values associated with interest rate swap agreements entered into with commercial customers that are not subject to periodic variation margin settlement

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payments. Included in trading account assets were assets related to deferred compensation plans aggregating $20 million at March 31, 2021, compared with $19 million March 31, 2020 and $21 million December 31, 2020.  Changes in the fair values of such assets are recorded as “trading account and foreign exchange gains” in the consolidated statement of income.  Included in “other liabilities” in the consolidated balance sheet at each of March 31, 2021 and December 31, 2020 were $24 million of liabilities related to deferred compensation plans, compared with $22 million at March 31, 2020.  Changes in the balances of such liabilities due to the valuation of allocated investment options to which the liabilities are indexed are recorded in “other costs of operations” in the consolidated statement of income.  Also included in trading account assets were investments in mutual funds and other assets that the Company was required to hold under terms of certain non-qualified supplemental retirement and other benefit plans that were assumed by the Company in various acquisitions.  Those assets totaled $29 million at each of March 31, 2021, March 31, 2020 and December 31, 2020.

Given the Company’s policies, limits and positions, management believes that the potential loss exposure to the Company resulting from market risk associated with trading account activities was not material, however, as previously noted, the Company is exposed to credit risk associated with counterparties to transactions related to the Company’s trading account activities.  Additional information about the Company’s use of derivative financial instruments in its trading account activities is included in note 10 of Notes to Financial Statements.

Provision for Credit Losses

A provision for credit losses is recorded to adjust the level of the allowance as deemed necessary by management.  A provision for credit losses recapture was recorded in the first quarter of 2021 for $25 million, compared with provisions of $250 million in the year-earlier quarter and $75 million in the fourth quarter of 2020. The provision recapture in the recent quarter reflects improvements in macroeconomic forecasts at March 31, 2021 as compared with previous forecasts.  Nevertheless, the impact of those improvements was cautiously evaluated given the somewhat uneven and incomplete recovery evident in the economy through the recent quarter-end.  The level of the provisions in the 2020 quarters reflected projections of expected credit losses that were based on economic forecasts at those dates. The Company’s estimates of expected losses reflect the ongoing impacts of the COVID-19 pandemic on economic activity, concerns about commercial real estate values in the hospitality and office building sectors, and the ultimate collectability of  real estate loans where borrowers requested repayment forbearance. Net charge-offs of loans were $75 million in the recent quarter, $49 million in the first quarter of 2020 and $97 million in the fourth quarter of 2020.  Net charge-offs as an annualized percentage of average loans and leases were .31% in the first quarter of 2021, .22% in the year-earlier quarter and .39% in the final quarter of 2020. A summary of net charge-offs by loan type is presented in the table that follows.

NET CHARGE-OFFS (RECOVERIES)

BY LOAN/LEASE TYPE

	First Quarter 2021		First Quarter 2020		Fourth Quarter 2020
	(In thousands)
Commercial, financial, leasing, etc.	$	4,434		13,122		67,002
Real estate:
Commercial		54,092		834		12,105
Residential		366		3,428		(538	)
Consumer		16,289		31,778		18,549
	$	75,181		49,162		97,118

The higher levels of net charge-offs of commercial loans in the fourth quarter of 2020 and commercial real estate loans in the first quarter of 2021 reflect the impact of the COVID-19 pandemic on borrowers’ abilities to repay loans associated with the retail, office building and hospitality sectors.  Included in net charge-offs of consumer loans were net charge-offs of: automobile loans of $2 million in the recent quarter, $7 million in the first quarter of

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2020 and $4 million in the final quarter of 2020; recreational finance loans of $7 million in the first quarter of 2021, $9 million in the year-earlier quarter and $8 million in the fourth 2020 quarter; and home equity loans and lines of credit secured by one-to-four family residential properties of $2 million in last year’s first quarter and less than $1 million in the final 2020 quarter, compared with net recoveries of less than $1 million in the initial 2021 quarter.

Nonaccrual loans aggregated $1.96 billion or 1.97% of total loans and leases outstanding at March 31, 2021, compared with $1.06 billion or 1.13% at March 31, 2020 and $1.89 billion or 1.92% at December 31, 2020. The higher level of nonaccrual loans at the past two quarter-ends as compared with March 31, 2020 reflects the continuing impact of the pandemic on borrowers’ ability to make contractual payments on their loans, most notably loans in the hospitality sector.

Accruing loans past due 90 days or more were $1.08 billion or 1.09% of loans and leases at March 31, 2021, compared with $530 million or .56% at March 31, 2020 and $859 million or .87% of outstanding loans at December 31, 2020.  Accruing loans past due 90 days or more included loans guaranteed by government-related entities of $1.04 billion, $464 million and $798 million at March 31, 2021, March 31, 2020 and December 31, 2020, respectively.  Guaranteed loans included one-to-four family residential mortgage loans serviced by the Company that were purchased to reduce associated servicing costs, including a requirement to advance principal and interest payments that had not been received from individual mortgagors.  Despite the loans being purchased by the Company, the insurance or guarantee by the applicable government-related entity remains in force.  The outstanding principal balances of those purchased loans that are guaranteed by government-related entities totaled $1.01 billion at March 31, 2021, $439 million a year earlier and $764 million at December 31, 2020. The remaining accruing loans past due 90 days or more not guaranteed by government-related entities were loans considered to be with creditworthy borrowers that were in the process of collection or renewal. In addition to the past due loans, the Company also has $2.4 billion of government-guaranteed residential mortgage loans that are not considered delinquent because the borrower has requested and received a COVID-19 related payment deferral. In general, those loans were also purchased to reduce associated servicing costs as described above and also remain covered by the insurance or guarantee of the applicable government-related entity, but are not considered to be past due in accordance with the accounting treatment afforded under the CARES Act and related regulatory and financial accounting guidance as described below and in note 1 of Notes to Financial Statements in M&T’s 2020 Annual Report.

Loans that were 30-89 days past due were $692 million at March 31, 2021, compared with $1.4 billion at March 31, 2020 and $662 million at December 31, 2020.  The lower levels of such past due loans at March 31, 2021 and December 31, 2020 were a result of loan payments received, many of which resulted in return to current status, and migrations of loans to nonaccrual status.  COVID-19 related payment deferral modifications resulted in such loans being classified as current in accordance with regulatory guidance and, as a result, did not contribute in incremental additions to loans categorized as 30-89 days past due.

The United States has been operating under a state of emergency related to the COVID-19 pandemic since March 13, 2020.  The direct and indirect effects of the COVID-19 pandemic resulted in a dramatic reduction in economic activity that severely hampered the ability of some businesses and consumers to meet their repayment obligations.  The CARES Act, in addition to providing financial assistance to both businesses and consumers, created a forbearance program for federally-backed mortgage loans, protects borrowers from negative credit reporting due to loan accommodations related to the national emergency, and provides financial institutions the option to temporarily suspend certain requirements under GAAP related to troubled debt restructurings for a limited period of time to account for the effects of COVID-19. The banking regulatory agencies likewise issued guidance encouraging financial institutions to work prudently with borrowers who are, or may be, unable to meet their contractual payment obligations because of the effects of COVID-19. That guidance, with concurrence of the Financial Accounting Standards Board and provisions of the CARES Act, allow modifications made on a good faith basis in response to COVID-19 to borrowers who were generally current with their payments prior to any relief, to not be treated as delinquent or as troubled debt restructurings. Modifications may include payment deferrals (including extensions of maturity dates), covenant waivers and fee waivers. The Company has worked with its customers affected by COVID-19 and, as previously noted, has granted modifications across many of its loan

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portfolios.  To the extent that such modifications met the criteria previously described, such modifications have not been classified as delinquent or as troubled debt restructurings. A summary of loans for which COVID-19 forbearances have been granted and which are not considered impaired or past due is presented herein and in note 4 of Notes to Financial Statements.

The Company also modified the terms of select loans in an effort to assist borrowers that were not related to the COVID-19 pandemic. If the borrower was experiencing financial difficulty and a concession was granted, the Company considered such modifications as troubled debt restructurings.  Loan modifications included such actions as the extension of loan maturity dates and the lowering of interest rates and monthly payments.  The objective of the modifications was to increase loan repayments by customers and thereby reduce net charge-offs. Information about modifications of loans that are considered troubled debt restructurings is included in note 4 of Notes to Financial Statements.

Residential real estate loans modified under specified loss mitigation programs prescribed by government guarantors that were not related to the COVID-19 pandemic have not been included in renegotiated loans because the loan guarantee remains in full force and, accordingly, the Company has not granted a concession with respect to the ultimate collection of the original loan balance. Such loans aggregated $417 million, $176 million and $342 million at March 31, 2021, March 31, 2020 and December 31, 2020, respectively.

Commercial loans and leases classified as nonaccrual totaled $295 million, $287 million and $307 million at March 31, 2021, March 31, 2020, and December 31, 2020, respectively. Commercial real estate loans in nonaccrual status aggregated $952 million, $227 million and $891 million at March 31, 2021, March 31, 2020 and December 31, 2020, respectively. The increases in commercial real estate loans in nonaccrual status at the two most recent quarter-ends as compared with March 31, 2020 were largely due to the addition of $530 million of hotel loans in the second half of 2020.

Nonaccrual residential real estate loans totaled $529 million at March 31, 2021, compared with $413 million at March 31, 2020, and $513 million at December 31, 2020. The increases at the two most recent quarter-ends as compared with the year-earlier date were largely reflective of the effect of recent economic conditions on borrowers. Included in residential real estate loans classified as nonaccrual were limited documentation first mortgage loans of $143 million at March 31, 2021, compared with $119 million at March 31, 2020 and $147 million at December 31, 2020.  Limited documentation first mortgage loans represent loans secured by residential real estate that at origination typically included some form of limited borrower documentation requirements as compared with more traditional loans. The Company no longer originates limited documentation loans.  Residential real estate loans past due 90 days or more and accruing interest aggregated $1.04 billion at March 31, 2021, compared with $474 million at March 31, 2020, and $793 million at December 31, 2020. Those amounts related to government-guaranteed loans as previously noted. Information about the location of nonaccrual and charged-off residential real estate loans as of and for the quarter ended March 31, 2021 is presented in the accompanying table.

Nonaccrual consumer loans were $182 million at March 31, 2021, compared with $135 million at March 31, 2020 and $183 million at December 31, 2020. Included in nonaccrual consumer loans at March 31, 2021, March 31, 2020 and December 31, 2020 were: automobile loans of $38 million, $19 million, and $39 million, respectively; recreational finance loans of $27 million, $13 million, and $26 million,  respectively; and outstanding balances of home equity loans and lines of credit of $79 million, $63 million, and $79 million, respectively.  Information about the location of nonaccrual and charged-off home equity loans and lines of credit as of and for the quarter ended March 31, 2021 is presented in the accompanying table.

Information about past due and nonaccrual loans as of March 31, 2021 and December 31, 2020 is also included in note 4 of Notes to Financial Statements.

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SELECTED RESIDENTIAL REAL ESTATE-RELATED LOAN DATA

								Quarter Ended
	March 31, 2021							March 31, 2021
			Nonaccrual					Net Charge-offs (Recoveries)
											Percent of
					Percent of						Average
	Outstanding				Outstanding						Outstanding
	Balances		Balances		Balances			Balances			Balances
	(Dollars in thousands)
Residential mortgages:
New York	$	5,200,203	$	141,164		2.71	%	$	479			.04	%
Pennsylvania		1,086,503		14,167		1.30			37			.01
Maryland		1,431,249		18,677		1.30			166			.05
New Jersey		2,693,751		98,043		3.64			(105	)		(.02	)
Other Mid-Atlantic (a)		1,231,129		20,748		1.69			30			.01
Other		4,100,034		92,329		2.25			117			.01
Total	$	15,742,869	$	385,128		2.45	%	$	724			.02	%
Residential construction loans:
New York	$	20,716	$	146		.70	%	$	—			—	%
Pennsylvania		7,885		234		2.97			—			—
Maryland		10,865		—		—			—			—
New Jersey		12,259		—		—			—			—
Other Mid-Atlantic (a)		18,023		—		—			—			—
Other		5,522		—		—			—			—
Total	$	75,270	$	380		.50	%	$	—			—	%
Limited documentation first mortgages:
New York	$	700,474	$	62,940		8.99	%	$	3			—	%
Pennsylvania		30,707		5,351		17.43			21			.26
Maryland		17,787		2,606		14.65			—			—
New Jersey		563,583		46,384		8.23			—			—
Other Mid-Atlantic (a)		16,025		1,522		9.50			(1	)		(.02	)
Other		202,968		24,266		11.96			(381	)		(.72	)
Total	$	1,531,544	$	143,069		9.34	%	$	(358	)		(.09	%)
First lien home equity loans and lines of credit:
New York	$	975,698	$	17,912		1.84	%	$	124			.05	%
Pennsylvania		593,748		10,203		1.72			200			.13
Maryland		477,952		11,422		2.39			274			.23
New Jersey		72,202		1,360		1.88			(6	)		(.03	)
Other Mid-Atlantic (a)		166,160		2,778		1.67			8			.02
Other		30,766		1,222		3.97			50			.68
Total	$	2,316,526	$	44,897		1.94	%	$	650			.11	%
Junior lien home equity loans and lines of credit:
New York	$	577,053	$	15,194		2.63	%	$	46			.03	%
Pennsylvania		204,839		2,550		1.24			(115	)		(.22	)
Maryland		398,677		10,053		2.52			(86	)		(.08	)
New Jersey		93,556		1,086		1.16			(1,168	)		(5.12	)
Other Mid-Atlantic (a)		180,941		4,276		2.36			(43	)		(.09	)
Other		40,093		945		2.36			(94	)		(.93	)
Total	$	1,495,159	$	34,104		2.28	%	$	(1,460	)		(.39	%)
Limited documentation junior lien:
New York	$	407	$	21		5.16	%	$	(2	)		(1.77	%)
Pennsylvania		156		24		15.38			10			22.56
Maryland		803		25		3.11			(1	)		(.41	)
New Jersey		118		—		—			—			—
Other Mid-Atlantic (a)		477		32		6.71			—			—
Other		2,157		85		3.94			8			1.43
Total	$	4,118	$	187		4.54	%	$	15			1.46	%

(a)Includes Delaware, Virginia, West Virginia and the District of Columbia.

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Real estate and other foreclosed assets totaled $30 million at March 31, 2021, compared with $84 million at March 31, 2020 and $35 million at December 31, 2020.  The decline from March 31, 2020 is largely reflective of foreclosure moratoriums imposed by government authorities in numerous jurisdictions. Net gains or losses associated with real estate and other foreclosed assets were not material during the three-months ended March 31, 2021, March 31, 2020 and December 31, 2020. At March 31, 2021, the Company’s holdings of residential real estate-related properties comprised approximately 81% of foreclosed assets.

A comparative summary of nonperforming assets and certain past due, renegotiated and impaired loan data and credit quality ratios is presented in the accompanying table.

NONPERFORMING ASSET AND PAST DUE, RENEGOTIATED AND IMPAIRED LOAN DATA

	2021			2020 Quarters
	First Quarter			Fourth			Third			Second			First
	(Dollars in thousands)
Nonaccrual loans	$	1,957,106			1,893,299			1,239,972			1,156,650			1,061,748
Real estate and other foreclosed assets		29,797			34,668			49,872			66,763			83,605
Total nonperforming assets	$	1,986,903			1,927,967			1,289,844			1,223,413			1,145,353
Accruing loans past due 90 days or more(a)	$	1,084,553			859,208			527,258			535,755			530,317
Government guaranteed loans included in totals above:
Nonaccrual loans	$	51,668			48,820			45,975			51,165			50,561
Accruing loans past due 90 days or more		1,044,599			798,121			505,446			454,269			464,243
Renegotiated loans	$	242,121			238,994			242,581			234,768			232,439
Nonaccrual loans to total loans and leases, net of    unearned discount		1.97	%		1.92	%		1.26	%		1.18	%		1.13	%
Nonperforming assets to total net loans and leases and    real estate and other foreclosed assets		2.00	%		1.96	%		1.31	%		1.25	%		1.22	%
Accruing loans past due 90 days or more(a) to total    loans and leases, net of unearned discount		1.09	%		.87	%		.54	%		.55	%		.56	%

(a)Predominantly residential real estate loans.

Management determines the allowance for credit losses under accounting guidance that requires estimating the amount of current expected credit losses over the remaining contractual term of the loan and lease portfolio.  A description of the methodologies used by the Company to estimate its allowance for credit losses can be found in note 4 of Notes to Financial Statements.  

In establishing the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and targeted credit review processes and also estimates losses for other loans and leases with similar risk characteristics on a collective basis.  For purposes of determining the level of the allowance for credit losses, the Company evaluates its loan and lease portfolio by loan type. At the time of the Company’s analysis regarding the determination of the allowance for credit losses as of March 31, 2021, concerns existed about the somewhat uneven and incomplete recovery evident in the economy related to the COVID-19 pandemic, despite recent improvements in macroeconomic forecasts; the ultimate effectiveness of economic stimulus being provided by the U.S. government; the volatile nature of global markets, including the impact international economic conditions could have on the U.S. economy; Federal Reserve positioning of monetary policy; the extent to which additional repayment forbearance might be requested by borrowers, in particular commercial real estate borrowers; and continued stagnant population and economic growth in the upstate New York and central Pennsylvania regions (approximately 49% of the Company’s loans and leases are to customers in New York State and Pennsylvania) that could see lingering effects of the economic downturn. The Company utilizes a loan grading system to differentiate risk amongst its commercial loans and commercial real estate loans. Loans with a lower

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expectation of default are assigned one of ten possible “pass” loan grades and through the loss estimation modeling and other techniques used by the Company are generally considered to possess lower expected losses when determining the allowance for credit losses. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed higher expected loss amounts when determining the allowance for credit losses. A criticized loan may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more. During 2021 and 2020, the Company re-graded significant portions of its commercial loans and commercial real estate loans, particularly those that were affected by COVID-19 impacts. Criticized commercial loans and commercial real estate loans totaled $8.4 billion at March 31, 2021, compared with $2.4 billion at March 31, 2020, and $7.2 billion at December 31, 2020. The rise in criticized loans at the two most recent quarter-ends as compared to March 31, 2020 reflects the impact of the pandemic on borrowers’ financial condition and the continuing re-grading of loans by the Company.  

The COVID-19 pandemic and related governmental responses led to a significant reduction in economic activity that has been detrimental to many borrowers across the Company’s geographic regions. Borrowers have been and will likely continue to be adversely impacted by the economic effects of the COVID-19 pandemic. Summaries of loans outstanding as of March 31, 2021 for which borrowers have been granted a COVID-19 related forbearance and loans extended under the PPP are provided in the accompanying table. Of the COVID-19 related modifications with payment deferrals at March 31, 2021, substantially all are scheduled to expire during 2021.

As commercial loans and commercial real estate loans were approved for modifications related to COVID-19, loan officers and credit department personnel reviewed and reassigned loan grades, as deemed appropriate. The Company assessed loans considering the creditworthiness of the borrower, collateral values, the financial condition of any guarantors, and the expected collectability of contractual principal and interest payments. Loan-to-collateral values on investor-owned loans are generally relatively low and oftentimes the loans include some form of recourse. Loans secured by residential real estate with a COVID-19 payment forbearance were evaluated for collectability based on the borrower’s ability to repay considering past performance and estimated collateral values. If collectability was considered doubtful, loans were classified as nonaccrual.

Loan officers in different geographic locations with the support of the Company’s credit department personnel review and reassign loan grades based on their detailed knowledge of individual borrowers and their judgment of the impact on such borrowers resulting from changing conditions in their respective regions. The Company re-assessed its loan grades for those borrowers most impacted by COVID-19 in 2020 and expects that loans will continue to be regraded in subsequent periods as more information becomes available. At least annually, however, updated financial information is obtained from commercial borrowers associated with pass grade loans and additional analysis is performed. On a quarterly basis, the Company’s centralized credit department reviews all criticized commercial loans and commercial real estate loans greater than $1 million to determine the appropriateness of the assigned loan grade, including whether the loan should be reported as accruing or nonaccruing. For criticized nonaccrual loans, additional meetings are held with loan officers and their managers, workout specialists and senior management to discuss each of the relationships. In analyzing criticized loans, borrower-specific information is reviewed, including operating results, future cash flows, recent developments and the borrower’s outlook, and other pertinent data. The timing and extent of potential losses, considering collateral valuation and other factors, and the Company’s potential courses of action are contemplated.

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COVID-19 RELATED LOANS AND LEASES DATA

	March 31, 2021
					COVID-19 Forbearance
Commercial, financial, leasing, etc.	Total		PPP		Payment Deferrals(a)			Other Forbearances(b)		Total
	(Dollars in millions)
Industry
Services	$	5,519	$	1,895	$	9		$	69	$	78
Motor vehicle and recreational    finance dealers		4,319		323		—			3		3
Manufacturing		3,664		621		1			21		22
Wholesale		2,188		333		—			31		31
Construction		2,084		1,025		—			—		—
Financial and insurance		2,084		57		21			4		25
Health services		2,028		728		—			—		—
Retail		1,845		534		3			—		3
Real estate investors		1,623		189		10			—		10
Transportation, communications,    utilities		1,590		286		17			3		20
Other		867		164		—			25		25
Total commercial, financial, leasing, etc.		27,811		6,155		61			156		217
Commercial real estate
Investor-owned
Permanent finance by property type
Retail/Service		4,712		—		96			3		99
Apartments/Multifamily		4,452		—		17			—		17
Office		4,265		—		2			2		4
Hotel		2,647		—		250			319		569
Health facilities		2,521		—		70			28		98
Industrial/Warehouse		1,422		—		1			—		1
Other		304		—		37			—		37
Total permanent		20,323		—		473			352		825
Total construction/development		9,659		—		72			101		173
Total investor-owned		29,982		—		545			453		998
Owner-occupied by industry
Other services		1,441		—		26			—		26
Motor vehicle and recreational    finance dealers		1,307		—		4			—		4
Retail		1,182		—		2			2		4
Health services		920		—		1			7		8
Wholesale		767		—		—			1		1
Manufacturing		594		—		1			—		1
Other		1,233		—		—			—		—
Total owner-occupied		7,444		—		34			10		44
Total commercial real estate		37,426		—		579			463		1,042
Residential real estate		17,350		—		3,315	(c)		—		3,315
Consumer
Recreational finance		7,282		—		14			—		14
Automobile		4,245		—		25			—		25
Homes equity lines and loans		3,816		—		19			—		19
Other		1,369		—		1			—		1
Total consumer		16,712		—		59			—		59
Total	$	99,299	$	6,155	$	4,014		$	619	$	4,633

(a) Represents accruing loans at March 31, 2021 for which a COVID-19 related payment deferral (including maturity extensions)   has been granted.

(b) Consists predominantly of accruing loans for which a COVID-19 related covenant waiver has been granted.

(c) Includes $2.4 billion of government-guaranteed loans.

With regard to residential real estate loans, the Company’s loss identification and estimation techniques make reference to loan performance and house price data in specific areas of the country where collateral securing the Company’s residential real estate loans is located. For residential real estate-related loans, including home equity

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loans and lines of credit, the excess of the loan balance over the net realizable value of the property collateralizing the loan is charged-off when the loan becomes 150 days delinquent.  That charge-off is based on recent indications of value from external parties that are generally obtained shortly after a loan becomes nonaccrual. Loans to consumers that file for bankruptcy are generally charged off to estimated net collateral value shortly after the Company is notified of such filings. At March 31, 2021, approximately 61% of the Company’s home equity portfolio consisted of first lien loans and lines of credit.  Of the remaining junior lien loans in the portfolio, approximately 60% (or approximately 23% of the aggregate home equity portfolio) consisted of junior lien loans that were behind a first lien mortgage loan that was not owned or serviced by the Company.  To the extent known by the Company, if a senior lien loan would be on nonaccrual status because of payment delinquency, even if such senior lien loan was not owned by the Company, the junior lien loan or line that is owned by the Company is placed on nonaccrual status. In monitoring the credit quality of its home equity portfolio for purposes of determining the allowance for credit losses, the Company reviews delinquency and nonaccrual information and considers recent charge-off experience. When evaluating individual home equity loans and lines of credit for charge off and for purposes of determining the allowance for credit losses, the Company gives consideration to the required repayment of any first lien positions related to collateral property.  Home equity line of credit terms vary but such lines are generally originated with an open draw period of ten years followed by an amortization period of up to twenty years. At March 31, 2021 approximately 84% of all outstanding balances of home equity lines of credit related to lines that were still in the draw period, the weighted-average remaining draw periods were approximately five years, and approximately 22%were making contractually allowed payments that do not include any repayment of principal.

Factors that influence the Company’s credit loss experience include overall economic conditions affecting businesses and consumers, generally, but also residential and commercial real estate valuations, in particular, given the size of the Company’s real estate loan portfolios. Commercial real estate valuations can be highly subjective, as they are based upon many assumptions.  Such valuations can be significantly affected over relatively short periods of time by changes in business climate, economic conditions, interest rates and, in many cases, the results of operations of businesses and other occupants of the real property.  Similarly, residential real estate valuations can be impacted by housing trends, the availability of financing at reasonable interest rates, and general economic conditions affecting consumers.

The Company generally estimates current expected credit losses on loans with similar risk characteristics on a collective basis. To estimate expected losses, the Company utilizes statistically developed models to project principal balances over the remaining contractual lives of the loan portfolios and determine estimated credit losses through a reasonable and supportable forecast period. The Company’s approach for estimating current expected credit losses for loans and leases at March 31, 2021, March 31, 2020 and December 31, 2020 included utilizing macroeconomic assumptions to project losses over a two-year reasonable and supportable forecast period. Subsequent to the forecast period, the Company reverted to longer-term historical loss experience, over a period of one year, to estimate expected credit losses over the remaining contractual life. Forward-looking estimates of certain macroeconomic variables are determined by the M&T Scenario Development Group, which is comprised of senior management business leaders and economists.  The assumptions utilized as of March 31, 2021 included a decrease in the unemployment rate in the first quarter of 2021 to approximately 6.2% from 6.8% at the end of the fourth quarter of 2020, followed by a gradual decrease of the unemployment rate through the first quarter of 2023 to 4.2%. The forecast assumes that GDP grows at a 6.3% annual rate during 2021 resulting in GDP returning to pre-pandemic levels during 2021.The commercial real estate price index was assumed to be flat from pre-pandemic levels over the next two years. Residential real estate prices were not assumed to fluctuate significantly. The forecast considered approved government stimulus through March 31, 2021, but not any further fiscal or monetary actions. The assumptions utilized as of December 31, 2020 included the national unemployment rate continuing at elevated levels, on average 6.9% through 2021, followed by a gradual return to long-term historical averages by the end of 2022. The forecast also assumed gross domestic product to grow at a 4.1% annual rate during 2021 resulting in a return to pre-pandemic levels by the end of 2022. Commercial real estate prices were assumed to decline by 6.8% in 2021, followed by improvement. Residential real estate prices were not assumed to fluctuate significantly. The forecast considered approved government stimulus at the end of 2020, but not any further fiscal or monetary actions. The forecast at March 31, 2020 reflected a sharp contraction of economic activity in the second quarter of

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2020 resulting in a projected unemployment rate of 9.3% and an annualized rate of decrease in gross domestic product as low as 26.1%. The assumptions utilized were based on information available to the Company at or near March 31, 2021, December 31, 2020 and March 31, 2020 at the time it was preparing its estimate of expected credit losses as of those dates.

In establishing the allowance for credit losses the Company also considers the impact of portfolio concentrations, changes in underwriting practices, product expansions into new markets, imprecision in its economic forecasts, geopolitical conditions and other risk factors that influence its loss estimation process.  Geopolitical conditions assessed at the end of the first quarter in 2021 included the potential impact of COVID-19 on economic activity that could influence the ability of customers to repay loan amounts in accordance with their contractual obligations.  With respect to economic forecasts the Company assessed the likelihood of alternative economic scenarios during the two-year reasonable and supportable time period and of more negative or positive outcomes on its allowance for credit losses. Economic forecasts have changed rapidly in the recent past due to the uncertain impacts of COVID-19.  Generally, an increase in unemployment rate or a decrease in any of the rate of change in gross domestic product, commercial real estate prices or home prices would have an adverse impact on expected credit losses and would likely result in an increase to the allowance for credit losses. Further information about the Company’s methodology to estimate expected credit losses is included in note 4 of Notes to Financial Statements.

Management believes that the allowance for credit losses at March 31, 2021 appropriately reflected expected credit losses inherent in the portfolio as of that date. The allowance for credit losses totaled $1.64 billion at March 31, 2021, compared with $1.38 billion at March 31, 2020 and $1.74 billion at December 31, 2020. As a percentage of loans outstanding, the allowance was 1.65% at March 31, 2021, 1.47% at March 31, 2020 and 1.76% at December 31, 2020. The level of the allowance reflects management’s evaluation of the loan and lease portfolio using the methodology and considering the factors as described herein. Should the various economic forecasts and credit factors considered by management in establishing the allowance for credit losses change and should management’s assessment of losses in the loan portfolio also change, the level of the allowance as a percentage of loans could increase or decrease in future periods. The reported level of the allowance reflects management’s evaluation of the loan and lease portfolio as of each respective date.

Other Income

Other income totaled $506 million in the first quarter of 2021, compared with $529 million in the year-earlier quarter and $551 million in the final quarter of 2020.  The lower level of other income as compared with the first quarter of 2020 resulted from declines in trading account and foreign exchange gains and service charges on deposit accounts, and a $23 million distribution from BLG in the initial quarter of 2020. Those factors were partially offset by increased residential mortgage banking revenues and trust income. The decreased income in the recent quarter as compared with the immediately preceding quarter predominantly reflects a fourth quarter 2020 distribution of $30 million from BLG and unrealized losses on investment securities.

Mortgage banking revenues were $139 million in the recent quarter, compared with $128 million in the first quarter of 2020 and $140 million in the final 2020 quarter.  Mortgage banking revenues are comprised of both residential and commercial mortgage banking activities. The Company’s involvement in commercial mortgage banking activities includes the origination, sales and servicing of loans under the multi-family loan programs of Fannie Mae, Freddie Mac and the U.S. Department of Housing and Urban Development.

Residential mortgage banking revenues, consisting of realized gains from sales of residential real estate loans and loan servicing rights, unrealized gains and losses on residential real estate loans held for sale and related commitments, residential real estate loan servicing fees, and other residential real estate loan-related fees and income, were $107 million in the initial quarter of 2021, $98 million in the similar quarter of 2020 and $95 million in the fourth quarter of 2020. As compared with the respective prior quarters, the higher residential mortgage banking revenues in the recent quarter resulted from increased gains associated with loans held for sale and related commitments, reflecting higher origination volumes and improved margins.

New commitments to originate residential real estate loans to be sold were approximately $1.3 billion in the first quarter of 2021, compared with $919 million in the year-earlier quarter and $1.2 billion in the fourth quarter of

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2020. Realized gains from sales of residential real estate loans and loan servicing rights and recognized net unrealized gains or losses attributable to residential real estate loans held for sale, commitments to originate loans for sale and commitments to sell loans totaled to gains of  $50 million in the first quarter of 2021, $32 million in the corresponding period of 2020 and $43 million in 2020’s final quarter.

Loans held for sale that were secured by residential real estate aggregated $773 million at March 31, 2021, $374 million at March 31, 2020 and $777 million at December 31, 2020.  Commitments to sell residential real estate loans and commitments to originate residential real estate loans for sale at pre-determined rates totaled $1.53 billion and $1.08 billion, respectively, at March 31, 2021, compared with $782 million and $712 million, respectively, at March 31, 2020 and $1.47 billion and $1.03 billion, respectively, at December 31, 2020.  Net recognized unrealized gains on residential real estate loans held for sale, commitments to sell loans, and commitments to originate loans for sale were $48 million at March 31, 2021, $17 million at March 31, 2020 and $52 million at December 31, 2020. Changes in net unrealized gains or losses are recorded in mortgage banking revenues and resulted in net decreases in revenues of $4 million in the recent quarter and $7 million in the final 2020 quarter, compared with net increases in revenues of $5 million in the first quarter of 2020.

Revenues from servicing residential real estate loans for others were $57 million during the quarter ended March 31, 2021, compared with $67 million and $52 million during the three months ended March 31, 2020 and December 31, 2020, respectively. Residential real estate loans serviced for others totaled $95.0 billion at March 31, 2021, $93.5 billion at March 31, 2020 and $94.4 billion at December 31, 2020. Reflected in residential real estate loans serviced for others were loans sub-serviced for others of $69.7 billion, $61.9 billion and $68.1 billion at March 31, 2021, March 31, 2020 and December 31, 2020, respectively. Revenues earned for sub-servicing loans totaled $34 million during the recent quarter, $37 million in the first quarter of 2020 and $28 million in the final quarter of 2020. The contractual servicing rights associated with loans sub-serviced by the Company were predominantly held by affiliates of BLG. Information about the Company’s relationship with BLG and its affiliates is included in note 15 of Notes to Financial Statements.

Capitalized residential mortgage servicing assets totaled $218 million at March 31, 2021 (net of a $21 million valuation allowance), $224 million at March 31, 2020 (net of a $17 million valuation allowance) and $201 million at December 31, 2020 (net of a $30 million valuation allowance).  During the recent quarter, the valuation allowance for capitalized residential mortgage servicing rights was reduced by $9 million, compared with additions to the valuation allowance of $10 million and $3 million in the first and fourth quarters of 2020, respectively. Those increases and decreases in the valuation allowance resulted from changes in the estimated fair value of capitalized mortgage servicing rights that reflected the impact of changes in interest rates on the expected rate of residential mortgage loan prepayments.

Commercial mortgage banking revenues totaled $32 million in the first quarter of 2021, compared with $30 million in the first quarter of 2020 and $45 million in the fourth quarter of 2020.  Included in such amounts were revenues from loan origination and sales activities of $17 million and $14 million in the first quarters of 2021 and 2020 respectively, and $31 million in the fourth quarter of 2020. Commercial real estate loans originated for sale to other investors were approximately $619 million in the recent quarter, compared with $611 million in the first quarter of 2020 and $1.1 billion in the fourth quarter of 2020. Loan servicing revenues totaled $15 million in the first quarter of 2021, compared with $16 million and $14 million in the first and fourth quarters of 2020, respectively. Capitalized commercial mortgage servicing assets were $136 million and $129 million at March 31, 2021 and 2020, respectively, and $133 million at December 31, 2020. Commercial real estate loans serviced for other investors totaled $22.6 billion at March 31, 2021, $21.0 billion at March 31, 2020 and $22.2 billion at December 31, 2020. Those servicing amounts included $4.0 billion at each of March 31, 2021 and December 31, 2020 and $3.8 billion at March 31, 2020 of loan balances for which investors had recourse to the Company if such balances are ultimately uncollectable. Included in commercial real estate loans serviced for others were loans sub-serviced for others of $3.3 billion at each of March 31, 2021, March 31, 2020 and December 31, 2020.  Commitments to sell commercial real estate loans and commitments to originate commercial real estate loans for sale were $348 million and $250 million, respectively, at March 31, 2021, $542 million and $291 million, respectively, at March 31, 2020 and $641 million

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and $364 million, respectively, at December 31, 2020. Commercial real estate loans held for sale at March 31, 2021, March 31, 2020 and December 31, 2020 were $99 million, $250 million and $278 million, respectively.

Service charges on deposit accounts were $93 million and $106 million in the first quarters of 2021 and 2020, respectively, and $96 million in the final quarter of 2020.  The declines in such service charges in the two most recent quarters as compared with the first quarter of 2020 resulted predominantly from lower consumer service charges, largely resulting from higher customer deposit balances offsetting transaction-based fees, largely overdraft fees.

Trust income includes fees related to two significant businesses. The Institutional Client Services (“ICS”) business provides a variety of trustee, agency, investment management and administrative services for corporations and institutions, investment bankers, corporate tax, finance and legal executives, and other institutional clients who: (i) use capital markets financing structures; (ii) use independent trustees to hold retirement plan and other assets; and (iii) need investment and cash management services.  The Wealth Advisory Services (“WAS”) business offers personal trust, planning, fiduciary, asset management, family office and other services designed to help high net worth individuals and families grow, preserve and transfer wealth. Trust income aggregated $156 million in the first quarter of 2021, compared with $149 million in the year-earlier quarter and $151 million in the fourth quarter of 2020.  Revenues associated with the ICS business were approximately $89 million during the quarter ended March 31, 2021, compared with $85 million and $86 million during the quarters ended March 31, 2020 and December 31, 2020, respectively. The higher revenues in the recent quarter as compared with the respective 2020 quarters were largely attributable to increased retirement services income resulting from growth in collective fund balances. Revenues attributable to WAS totaled approximately $59 million in each of three-month periods ended March 31, 2021 and December 31, 2020 and $56 million during the three-month period ended March 31, 2020. The higher revenues in the recent quarter as compared with the initial 2020 quarter were largely attributable to favorable equity market performance that was partially offset by proprietary fund money market fee waivers as a result of the current interest rate environment.  Trust assets under management were $141.5 billion, $103.6 billion and $135.8 billion at March 31, 2021, March 31, 2020 and December 31, 2020, respectively.  Trust assets under management include the Company’s proprietary mutual funds’ assets of $12.7 billion, $12.8 billion and $12.9 billion at March 31, 2021, March 31, 2020 and December 31, 2020, respectively.  Additional trust income from investment management activities was $8 million in each of the first quarters of 2021 and 2020 and $6 million in the fourth 2020 quarter, and is predominantly comprised of fees earned from retail customer investment accounts.

Brokerage services income, which includes revenues from the sale of mutual funds and annuities and securities brokerage fees, totaled $13 million in each of the first quarters of 2021 and 2020 and $12 million in the fourth quarter of 2020.  Trading account and foreign exchange activity resulted in gains of $6 million, $21 million and $7 million during the quarters ended March 31, 2021, March 31, 2020 and December 31, 2020, respectively.  The lower gains in the two most recent quarters as compared with the first quarter of 2020 were predominantly due to decreased activity related to interest rate swap agreements executed on behalf of commercial customers.  The Company enters into interest rate and foreign exchange contracts with customers who need such services and concomitantly enters into offsetting trading positions with third parties to minimize the risks involved with these types of transactions.  Information about the notional amount of interest rate, foreign exchange and other contracts entered into by the Company for trading account purposes is included in note 10 of Notes to Financial Statements and herein under the heading “Taxable-equivalent Net Interest Income.”

The Company recognized net losses on investment securities of $12 million in the recent quarter and $21 million in the first quarter of 2020, compared with net gains of $2 million in the fourth quarter of 2020.  The gains and losses represented unrealized gains and losses on investments in Fannie Mae and Freddie Mac preferred stock.

Other revenues from operations were $111 million in the first quarter of 2021, compared with $133 million in the corresponding 2020 period and $143 million in the fourth quarter of 2020. The primary factor for the decrease in such revenues in the recent quarter as compared with the first and fourth quarters of 2020 was distributions from BLG in the 2020 periods. Included in other revenues from operations were the following significant components. Letter of credit and other credit-related fees aggregated $31 million in the recent quarter, $32 million in the year-earlier quarter and $26 million in the final quarter of 2020.  Revenues from merchant discount and credit card fees

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were $26 million in the first quarter of 2021, compared with $30 million in the year-earlier quarter and and $31 million in the fourth quarter of 2020. Tax-exempt income from bank owned life insurance, which includes increases in the cash surrender value of life insurance policies and benefits received, totaled $10 million in each of the first quarter of 2021 and fourth quarter of 2020 and $12 million in the first quarter of 2020. Insurance-related sales commissions and other revenues totaled $14 million in the quarter ended March 31, 2021, compared with $15 million in the first quarter of 2020 and $11 million in the fourth quarter of 2020.  M&T’s investment in BLG resulted in income of $23 million and $30 million in the first and fourth quarters of 2020, respectively.  There was no similar income in the initial 2021 quarter.

Other Expense

Other expense totaled $919 million in the first quarter of 2021, compared with $906 million in the year-earlier quarter and $845 million in the final three months of 2020. Included in those amounts are expenses considered to be “nonoperating” in nature consisting of amortization of core deposit and other intangible assets of $3 million in each of the two most recent quarters and $4 million in the first quarter of 2020 and merger-related expenses of $10 million in the initial 2021 quarter. Exclusive of those nonoperating expenses, noninterest operating expenses were $907 million in the recent quarter, compared with $903 million in the year-earlier quarter and $842 million in the final 2020 quarter. As compared with the first quarter of 2020, higher expenses for salaries and employee benefits and professional services in the initial 2021 quarter were partially offset by a recent quarter reduction of the valuation allowance for capitalized residential mortgage servicing rights of $9 million. When compared with the fourth quarter of 2020, the recent quarter increase in noninterest operating expenses resulted from higher costs for salaries and employee benefits, reflecting seasonally higher stock-based compensation and employee benefits expenses during the recent quarter, and increased professional services expenses, partially offset by the recent quarter reduction of the valuation allowance for capitalized residential mortgage servicing rights. Table 2 provides a reconciliation of other expense to noninterest operating expense.

Salaries and employee benefits expense totaled $541 million in the first quarter of 2021, compared with $537 million in the year-earlier quarter and $476 million in the fourth quarter of 2020. The higher salaries and employee benefits expenses in the recent quarter as compared with the fourth quarter of 2020 reflect seasonally higher stock-based compensation, medical plan costs, payroll-related taxes, unemployment insurance and the Company’s contributions for retirement savings plan benefits related to annual incentive compensation payments that aggregated approximately $69 million. Similar expenses in the first quarter of 2020 were approximately $67 million. The Company, in accordance with GAAP, has accelerated the recognition of compensation costs for stock-based awards granted to retirement-eligible employees and employees who will become retirement-eligible prior to full vesting of the award. As a result, stock-based compensation expense during the first quarters of 2021 and 2020 included $34 million and $31 million, respectively, that would have been recognized over the normal vesting period if not for the accelerated recognition provisions of GAAP. That acceleration had no effect on the value of stock-based compensation awarded to employees. Salaries and employee benefits expense included stock-based compensation of $48 million and $43 million in the three-month periods ended March 31, 2021 and March 31, 2020, respectively, and $11 million in the three-month period ended December 31, 2020. The number of full-time equivalent employees was 17,157 at March 31, 2021, compared with 17,416 and 17,076 at March 31, 2020 and December 31, 2020, respectively.

Excluding the nonoperating expense items described earlier from each quarter, nonpersonnel operating expenses were $366 million in the each of the quarters ended March 31, 2021, March 31, 2020 and December 31, 2020. As compared with the first and fourth quarters of 2020, higher contributions made to The M&T Charitable Foundation and professional services costs in the recent quarter were offset by a $9 million reduction of the valuation allowance for capitalized residential mortgage servicing rights in the initial 2021 quarter (compared with  additions to that valuation allowance of $10 million and $3 million in the first and fourth quarters of 2020, respectively).  

The efficiency ratio measures the relationship of noninterest operating expenses to revenues.  The Company’s efficiency ratio was 60.3% during the recent quarter, compared with 58.9% and 54.6% in the first quarter of 2020 and fourth quarter of 2020, respectively. The calculation of the efficiency ratio is presented in Table 2.

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Income Taxes

The provision for income taxes was $145 million in the first quarter of 2021, compared with $81 million in the year-earlier quarter and $149 million in the final quarter of 2020. The effective tax rates were 24.5%, 23.1% and 24.1% for the quarters ended March 31, 2021, March 31, 2020 and December 31, 2020, respectively.

The effective tax rate is affected by the level of income earned that is exempt from tax relative to the overall level of pre-tax income, the level of income allocated to the various state and local jurisdictions where the Company operates, because tax rates differ among such jurisdictions, and the impact of any large discrete or infrequently occurring items.  The Company’s effective tax rate in future periods will also be affected by any change in income tax laws or regulations and interpretations of income tax regulations that differ from the Company’s interpretations by any of various tax authorities that may examine tax returns filed by M&T or any of its subsidiaries.

Capital

Shareholders’ equity was $16.4 billion at March 31, 2021, representing 10.93% of total assets, compared with $15.8 billion or 12.70% a year earlier and $16.2 billion or 11.35% at December 31, 2020.

Included in shareholders’ equity was preferred stock with financial statement carrying values of $1.25 billion at each of March 31, 2021, March 31, 2020 and December 31, 2020.

Common shareholders’ equity was $15.2 billion or $118.12 per share, at March 31, 2021, compared with $14.6 billion or $113.54 per share, a year earlier and $14.9 billion or $116.39 per share at December 31, 2020.  Tangible equity per common share, which excludes goodwill and core deposit and other intangible assets and applicable deferred tax balances, was $82.35 at the end of the recent quarter, compared with $77.60 at March 31, 2020 and $80.52 at December 31, 2020.  The Company’s ratio of tangible common equity to tangible assets was 7.26% at March 31, 2021, compared with 8.30% a year earlier and 7.49% at December 31, 2020.  Reconciliations of total common shareholders’ equity and tangible common equity and total assets and tangible assets as of each of those respective dates are presented in table 2.

Shareholders’ equity reflects accumulated other comprehensive income or loss, which includes the net after-tax impact of unrealized gains or losses on investment securities classified as available for sale, remaining unrealized losses on held-to-maturity securities transferred from available for sale that have not yet been amortized, gains or losses associated with interest rate swap agreements designated as cash flow hedges, foreign currency translation adjustments and adjustments to reflect the funded status of defined benefit pension and other postretirement plans.  Net unrealized gains on investment securities reflected in shareholders’ equity, net of applicable tax effect, were $122 million or $.95 per common share, at March 31, 2021, $135 million, or $1.05 per common share, at March 31, 2020 and $145 million, or $1.13 per common share, at December 31, 2020.  Changes in unrealized gains and losses on investment securities are predominantly reflective of the impact of changes in interest rates on the values of such securities.  Information about unrealized gains and losses as of March 31, 2021 and December 31, 2020 is included in note 3 of Notes to Financial Statements.

Reflected in the carrying amount of available-for-sale investment securities at March 31, 2021 were pre-tax effect unrealized gains of $177 million on securities with an amortized cost of $4.1 billion and pre-tax effect unrealized losses of $7 million on securities with an amortized cost of $103 million.  Information concerning the Company’s fair valuations of investment securities is provided in notes 3 and 12 of Notes to Financial Statements.

Each reporting period the Company reviews its available-for-sale investment securities for declines in value that might be indicative of credit-related losses through an analysis of the creditworthiness of the issuer or the credit performance of the underlying collateral supporting the bond.  If the Company does not expect to recover the entire amortized cost basis of a debt security a credit loss is recognized in the consolidated statement of income.  A loss is also recognized if the Company intends to sell a bond or it more likely than not will be required to sell a bond before recovery of the amortized cost basis.

As of March 31, 2021, based on a review of each of the securities in the available-for-sale investment securities portfolio, the Company concluded that it expected to realize the amortized cost basis of each security. As of March

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31, 2021, the Company did not intend to sell nor is it anticipated that it would be required to sell any securities for which fair value was less than the amortized cost basis of the security. The Company intends to continue to closely monitor the performance of its securities because changes in their underlying credit performance or other events could cause the amortized cost basis of those securities to become uncollectable.

Accounting guidance requires investment securities held to maturity to be presented at their net carrying value that is expected to be collected over their contractual term.  The Company estimated no material allowance for credit losses for its investment securities classified as held-to-maturity at March 31, 2021 and December 31, 2020 as the substantial majority of such investment securities were obligations backed by the U.S. government or its agencies.  The Company assessed the potential for expected credit losses on privately issued mortgage-backed securities in the held-to-maturity portfolio by performing internal modeling to estimate bond-specific cash flows considering recent performance of the mortgage loan collateral and utilizing assumptions about future defaults and loss severity. These bond-specific cash flows also reflect the placement of the bond in the overall securitization structure and the remaining subordination levels.  In total, at March 31, 2021 and December 31, 2020, the Company had in its held-to-maturity portfolio privately issued mortgage-backed securities with an amortized cost basis of $73 million and $77 million, respectively, and a fair value of $68 million and $70 million, respectively.  At March 31, 2021, 81% of the mortgage-backed securities were in the most senior tranche of the securitization structure. The mortgage-backed securities are generally collateralized by residential and small-balance commercial real estate loans originated between 2004 and 2008. After considering the repayment structure and estimated future collateral cash flows of each individual bond, the Company has concluded that as of March 31, 2021, it expected to recover the amortized cost basis of those privately issued mortgage-backed securities.  Nevertheless, it is possible that adverse changes in the estimated future performance of mortgage loan collateral underlying such securities could impact the Company’s conclusions.

Adjustments to reflect the funded status of defined benefit pension and other postretirement plans, net of applicable tax effect, reduced accumulated other comprehensive income by $468 million, or $3.64 per common share, at March 31, 2021, $333 million or $2.60 per common share, at March 31, 2020 and $481 million or $3.75 per common share, at December 31, 2020. 

On January 20, 2021, M&T’s Board of Directors authorized a stock repurchase plan to repurchase up to $800 million of shares of M&T’s common stock subject to all applicable regulatory limitations.  There were no repurchases pursuant to that repurchase plan in the first quarter of 2021, and M&T does not expect any repurchases while the acquisition of People’s United is pending. Pursuant to previously approved capital plans and authorizations by M&T’s Board of Directors, M&T repurchased 2,577,000 shares of its common stock for $374 million in the first quarter of 2020.  There were no repurchases of M&T common stock in the fourth quarter of 2020.

Cash dividends declared on M&T’s common stock totaled $143 million in each of the first quarters of 2021 and 2020, compared with $142 million in the final quarter of 2020.  Cash dividends declared on preferred stock aggregated $17 million in each of the two most recent quarters and in the first quarter of 2020.

M&T and its subsidiary banks are required to comply with applicable capital adequacy standards established by the federal banking agencies. Pursuant to those regulations, the minimum capital ratios are as follows:

• 4.5% Common Equity Tier 1 (“CET1”) to risk-weighted assets (each as defined in the capital regulations);

• 6.0% Tier 1 capital (that is, CET1 plus Additional Tier 1 capital) to risk-weighted assets (each as defined in the capital regulations);

• 8.0% Total capital (that is, Tier 1 capital plus Tier 2 capital) to risk-weighted assets (each as defined in the capital regulations); and

• 4.0% Tier 1 capital to average consolidated assets as reported on consolidated financial statements (known as the “leverage ratio”), as defined in the capital regulations.

In addition, capital regulations require a “capital conservation buffer” of 2.5% composed entirely of CET1 on top of the minimum risk-weighted asset ratios.

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The federal bank regulatory agencies have issued rules that allow banks and bank holding companies to phase-in the impact of adopting the expected credit loss accounting model on regulatory capital. Those rules allow banks and bank holding companies to delay for two years the day one impact on retained earnings of adopting the expected loss accounting standard and 25% of the cumulative change in the reported allowance for credit losses subsequent to the initial adoption, followed by a three-year transition period. M&T and its subsidiary banks adopted these rules and the impact is reflected in the regulatory capital ratios presented below.

The regulatory capital ratios of the Company and its bank subsidiaries, M&T Bank and Wilmington Trust, N.A., as of March 31, 2021 are presented in the accompanying table.

REGULATORY CAPITAL RATIOS

March 31, 2021 

	M&T		M&T		Wilmington
	(Consolidated)		Bank		Trust, N.A.
Common equity Tier 1		10.42%		11.29%		41.29%
Tier 1 capital		11.61%		11.29%		41.29%
Total capital		13.81%		13.01%		41.40%
Tier 1 leverage		8.49%		8.26%		9.84%

The Company is subject to the comprehensive regulatory framework applicable to bank and financial holding companies and their subsidiaries, which includes examinations by a number of regulators. Regulation of financial institutions such as M&T and its subsidiaries is intended primarily for the protection of depositors, the Deposit Insurance Fund of the FDIC and the banking and financial system as a whole, and generally is not intended for the protection of shareholders, investors or creditors other than insured depositors. Changes in laws, regulations and regulatory policies applicable to the Company’s operations can increase or decrease the cost of doing business, limit or expand permissible activities or affect the competitive environment in which the Company operates, all of which could have a material effect on the business, financial condition or results of operations of the Company and in M&T’s ability to pay dividends. For additional information concerning this comprehensive regulatory framework, refer to Part I, Item 1 of M&T’s Form 10-K for the year ended December 31, 2020.

Segment Information

The Company's reportable segments have been determined based upon its internal profitability reporting system, which is organized by strategic business unit. Financial information about the Company's segments is presented in note 14 of Notes to Financial Statements. The reportable segments are Business Banking, Commercial Banking, Commercial Real Estate, Discretionary Portfolio, Residential Mortgage Banking and Retail Banking.

The Business Banking segment contributed net income of $46 million during the three-month period ended March 31, 2021, compared with $33 million in the first quarter of 2020 and $53 million in the fourth quarter of 2020. As compared with the year-earlier quarter, a $22 million increase in net interest income and a $6 million reduction in the provision for credit losses, due to lower net charge-offs, were partially offset by higher personnel-related costs of $4 million and a $3 million decrease in service charges on deposit accounts. The higher net interest income reflected higher average outstanding balances of deposits and loans of $5.0 billion and $2.6 billion, respectively, and a 76 basis point widening of the net interest margin on loans offset, in part, by a narrowing of the net interest margin on deposits of 111 basis points. The decline in net income in the initial 2021 quarter as compared with the immediately preceding quarter reflected a $5 million increase in personnel-related costs, lower merchant discount and credit card fees of $2 million, and $2 million of higher centrally-allocated costs associated with data processing, risk management and other support services provided to the Business Banking segment.

Net income of the Commercial Banking segment was $123 million in the recent quarter, compared with $144 million in the initial 2020 quarter and $122 million in the final 2020 quarter.  The recent quarter’s decline in net income as compared with the first quarter of 2020 included an increase in the provision for credit losses of $26 million that reflected the impact of portfolio composition and net charge-offs, and a $5 million decrease in trading account and foreign exchange gains that resulted from lower activity related to interest rate swap agreements

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executed on behalf of commercial customers. Those unfavorable factors were offset, in part, by a decline in personnel-related costs of $4 million. The slight increase in net income in the first quarter of 2021 quarter as compared with the fourth quarter of 2020 was due to higher fees for providing loan syndication services of $6 million and lower personnel-related costs of $6 million, partially offset by a $7 million increase in the provision for credit losses.

The Commercial Real Estate segment recorded net income of $71 million in the first quarter of 2021, compared with $117 million in the year-earlier period and $70 million in the fourth quarter of 2020.  The 39% decline in net income in the recent quarter as compared with the first quarter of 2020 reflected an increase in the provision for credit losses of $36 million, due to higher net charge-offs, a $13 million decline in net interest income, and lower trading account and foreign exchange gains of $10 million, due largely to decreased activity related to interest rate swap transactions executed on behalf of commercial customers. The lower net interest income reflected a narrowing of the net interest margin on deposits and loans of 105 basis points and 19 basis points, respectively. The recent quarter’s modest improvement in net income as compared with the immediately preceding quarter reflected decreases in the provision for credit losses and personnel-related expenses that were largely offset by a decline in commercial mortgage banking revenues, reflecting lower gains on loans originated for sale, and a decrease in net interest income. The $9 million decline in net interest income reflected a narrowing of the net interest margin on deposits and loans of 16 basis points and 3 basis points, respectively.

Net income earned by the Discretionary Portfolio segment totaled $91 million during the three-month period ended March 31, 2021, compared with $26 million in the year-earlier period and $108 million in the fourth quarter of 2020. The significant improvement in the recent quarter’s net income as compared with the initial 2020 quarter was predominantly due to an increase in net interest income of $77 million that reflected additional income from interest rate swap agreements utilized as part of the Company’s management of interest rate risk of $55 million. A 148 basis point and 55 basis point widening of the net interest margin on loans and deposits, respectively, also contributed to the higher net interest income. The 17% decline in net income in the initial 2021 quarter as compared with immediately preceding quarter reflected $12 million of valuation losses on marketable equity securities in the recent quarter (compared with valuation gains of $2 million in the fourth quarter of 2020) and lower net interest income of $7 million, largely reflecting a narrowing of the net interest margin on loans of 41 basis points.

Net income from the Residential Mortgage Banking segment was $50 million in the initial three months of 2021, compared with $25 million in the first quarter of 2020 and $27 million in 2020’s fourth quarter.  The increase in net income in the recent quarter as compared with the year-earlier period reflected lower servicing-related costs (including intersegment costs and changes to the valuation allowance for capitalized residential mortgage servicing rights) of $21 million, higher net interest income of $18 million, reflecting increased average outstanding balances of loans and deposits of $2.3 billion and $1.6 billion, respectively, and higher revenues associated with mortgage origination and sales activities (including intersegment revenues) of $17 million. Those favorable factors were partially offset by an $11 million decrease in revenues associated with servicing and sub-servicing residential real estate loans (including intersegment revenues) and $7 million of increases in centrally-allocated costs associated with data processing, risk management and other support services provided to the Residential Mortgage Banking segment. As compared with the final quarter of 2020, the improved performance in the recent quarter reflected lower servicing-related costs (including intersegment costs and changes to the valuation allowance for capitalized residential mortgage servicing rights) of $15 million, higher revenues associated with mortgage origination and sales activities (including intersegment revenues) of $6 million, and a $5 million increase in revenues associated with servicing and sub-servicing residential real estate loans (including intersegment revenues).

Net income earned by the Retail Banking segment totaled $85 million in the first quarter of 2021, compared with $110 million in the year-earlier quarter and $83 million in the final 2020 quarter. The 23% decline in net income in the recent quarter as compared with the first quarter of 2020 resulted predominantly from a $46 million decline in net interest income, due largely to an 85 basis point narrowing of the net interest margin on deposits, partially offset by an increase of average outstanding deposit balances of $6.0 billion, and a $10 million decrease in service charges on deposit accounts. Those factors were partially offset by a $17 million decrease in the provision for credit losses, due to lower net charge-offs, and lower personnel-related costs of $7 million. The recent quarter’s

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slightly improved performance as compared with the fourth quarter of 2020 was due to decreases in the provision for credit losses and net occupancy expenses of $12 million. Those favorable factors were offset, in part, by $5 million decreases in each of service charges on deposit accounts and net interest income. The lower net interest income reflected a narrowing of the net interest margin on deposits of 9 basis points that was partially offset by an increase in average outstanding deposit balances of $2.1 billion.

The “All Other” category reflects other activities of the Company that are not directly attributable to the reported segments.  Reflected in this category are the amortization of core deposit and other intangible assets resulting from the acquisitions of financial institutions, distributions from BLG, merger-related expenses resulting from acquisitions, and the net impact of the Company’s allocation methodologies for internal transfers for funding charges and credits associated with the earning assets and interest-bearing liabilities of the Company’s reportable segments and the provision for credit losses.  The “All Other” category also includes trust income of the Company that reflects the ICS and WAS business activities.  The various components of the “All Other” category resulted in net losses totaling $18 million in the first quarter of 2021 and $186 million in the year-earlier quarter, compared with net income of $7 million in the fourth quarter of 2020.  The significantly lower loss in the recent quarter as compared with the initial 2020 quarter largely reflected: a decrease to the provision for credit losses of $312 million; a $7 million increase in trust income; lower advertising and promotional expenses of $6 million; and the favorable impact from the Company’s allocation methodologies for internal transfers for funding charges and credits associated with earning assets and interest-bearing liabilities of the Company’s reportable segments. Those favorable factors were partially offset by lower income from BLG of $23 million; $15 million in higher professional services; and higher personnel-related expenses of $6 million, including incentive-based compensation and employee benefits expenses. As compared with the immediately preceding quarter, factors contributing to the unfavorable performance in the recent quarter included: a $75 million rise in personnel-related costs that included the seasonally higher stock-based compensation and employee benefits expenses; $30 million of income received from BLG in the fourth quarter of 2020; and $18 million of higher professional services costs. Partially offsetting those unfavorable factors were a decrease to the provision for credit losses of $73 million, lower FDIC assessments of $6 million, higher trust income of $5 million in the first quarter of 2021, and the favorable impact from the Company’s allocation methodologies.

Recent Accounting Developments

A discussion of recent accounting developments is included in note 16 of Notes to Financial Statements.

Forward-Looking Statements

Management’s Discussion and Analysis of Financial Condition and Results of Operations and other sections of this quarterly report contain forward-looking statements that are based on current expectations, estimates and projections about the Company’s business, management’s beliefs and assumptions made by management.  Any statement that does not describe historical or current facts is a forward-looking statement.

Statements regarding the potential effects of the COVID-19 pandemic on the Company's business, financial condition, liquidity and results of operations may constitute forward-looking statements and are subject to the risk that the actual effects may differ, possibly materially, from what is reflected in those forward-looking statements due to factors and future developments that are uncertain, unpredictable and in many cases beyond the Company's control, including the scope and duration of the pandemic, actions taken by governmental authorities in response to the pandemic, and the direct and indirect impact of the pandemic on customers, clients, third parties and the Company.

Statements regarding the Company’s expectations or predictions regarding the proposed transaction between M&T and People’s United also are forward-looking statements, including statements regarding the expected timing, completion and effects of the proposed transaction as well as M&T’s and People’s United’s expected financial results, prospects, targets, goals and outlook.  

Forward-looking statements are typically identified by words such as “believe,” “expect,” “anticipate,” “intend,” “target,” “estimate,” “continue,” “positions,” “prospects” or “potential,” by future conditional verbs such as “will,” “would,” “should,” “could,” or “may,” or by variations of such words or by similar expressions. These

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statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions (“Future Factors”) which are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or forecasted in such forward-looking statements. Forward-looking statements speak only as of the date they are made and the Company assumes no duty to update forward-looking statements.

Future Factors include changes in interest rates, spreads on earning assets and interest-bearing liabilities, and interest rate sensitivity; prepayment speeds, loan originations, credit losses and market values on loans, collateral securing loans, and other assets; sources of liquidity; common shares outstanding; common stock price volatility; fair value of and number of stock-based compensation awards to be issued in future periods; risks, predictions and uncertainties relating to the impact of the COVID-19 pandemic and the People’s United transaction; the impact of changes in market values on trust-related revenues; legislation and/or regulations affecting the financial services industry as a whole, and M&T and its subsidiaries individually or collectively, including tax legislation or regulation; regulatory supervision and oversight, including monetary policy and capital requirements; changes in accounting policies or procedures as may be required by the Financial Accounting Standards Board, regulatory agencies or legislation; increasing price and product/service competition by competitors, including new entrants; rapid technological developments and changes; the ability to continue to introduce competitive new products and services on a timely, cost-effective basis; the mix of products/services; containing costs and expenses; governmental and public policy changes; protection and validity of intellectual property rights; reliance on large customers; technological, implementation and cost/financial risks in large, multi-year contracts; the outcome of pending and future litigation and governmental proceedings, including tax-related examinations and other matters; continued availability of financing; financial resources in the amounts, at the times and on the terms required to support M&T and its subsidiaries' future businesses; and material differences in the actual financial results of merger, acquisition and investment activities compared with M&T's initial expectations, including the full realization of anticipated cost savings and revenue enhancements.

These are representative of the Future Factors that could affect the outcome of the forward-looking statements.  In addition, such statements could be affected by general industry and market conditions and growth rates, general economic and political conditions, either nationally or in the states in which M&T and its subsidiaries do business, including interest rate and currency exchange rate fluctuations, changes and trends in the securities markets, and other Future Factors.

M&T provides further detail regarding these risks, uncertainties and other factors elsewhere in this quarterly report and in other public filings, including the risk factors described in Form 10-K for the year ended December 31, 2020 and this quarterly report.

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 1

QUARTERLY TRENDS

	2021				2020 Quarters
	First Quarter				Fourth			Third			Second			First
Earnings and dividends
Amounts in thousands, except per share
Interest income (taxable-equivalent basis)	$	1,020,695				1,042,862			1,005,180			1,036,476			1,125,482
Interest expense		35,567				49,610			58,066			75,105			143,614
Net interest income		985,128				993,252			947,114			961,371			981,868
Less: provision for credit losses		(25,000	)			75,000			150,000			325,000			250,000
Other income		505,598				551,250			520,561			487,273			529,360
Less: other expense		919,444				845,008			826,774			807,042			906,416
Income before income taxes		596,282				624,494			490,901			316,602			354,812
Applicable income taxes		145,300				149,382			114,746			71,314			80,927
Taxable-equivalent adjustment		3,733				3,972			4,019			4,234			5,063
Net income	$	447,249				471,140			372,136			241,054			268,822
Net income available to common shareholders-diluted	$	428,093				451,869			353,400			223,099			250,701
Per common share data
Basic earnings	$	3.33				3.52			2.75			1.74			1.93
Diluted earnings		3.33				3.52			2.75			1.74			1.93
Cash dividends	$	1.10				1.10			1.10			1.10			1.10
Average common shares outstanding
Basic		128,537				128,303			128,285			128,275			129,696
Diluted		128,669				128,379			128,355			128,333			129,755
Performance ratios, annualized
Return on
Average assets		1.22		%		1.30	%		1.06	%		.71	%		.90	%
Average common shareholders’ equity		11.57		%		12.07	%		9.53	%		6.13	%		7.00	%
Net interest margin on average earning assets    (taxable-equivalent basis)		2.97		%		3.00	%		2.95	%		3.13	%		3.65	%
Nonaccrual loans to total loans and leases, net of     unearned discount		1.97		%		1.92	%		1.26	%		1.18	%		1.13	%
Net operating (tangible) results (a)
Net operating income (in thousands)	$	457,372				473,453			375,029			243,958			271,705
Diluted net operating income per common share	$	3.41				3.54			2.77			1.76			1.95
Annualized return on
Average tangible assets		1.29		%		1.35	%		1.10	%		.74	%		.94	%
Average tangible common shareholders’ equity		17.05		%		17.53	%		13.94	%		9.04	%		10.39	%
Efficiency ratio (b)		60.3		%		54.6	%		56.2	%		55.7	%		58.9	%
Balance sheet data
In millions, except per share
Average balances
Total assets (c)	$	148,157				144,563			140,181			136,446			120,585
Total tangible assets (c)		143,554				139,958			135,574			131,836			115,972
Earning assets		134,355				131,916			127,689			123,492			108,226
Investment securities		6,605				7,195			7,876			8,500			9,102
Loans and leases, net of unearned discount		99,356				98,666			98,210			97,797			91,706
Deposits		125,733				120,976			116,306			111,795			96,166
Common shareholders’ equity (c)		15,077				14,963			14,823			14,703			14,470
Tangible common shareholders’ equity (c)		10,474				10,358			10,216			10,093			9,857
At end of quarter
Total assets (c)	$	150,481				142,601			138,627			139,537			124,578
Total tangible assets (c)		145,879				137,998			134,021			134,928			119,966
Earning assets		137,367				129,295			126,418			127,149			112,046
Investment securities		6,611				7,046			7,723			8,454			8,957
Loans and leases, net of unearned discount		99,299				98,536			98,447			97,758			94,142
Deposits		128,476				119,806			115,163			114,968			100,183
Common shareholders’ equity (c)		15,197				14,937			14,851			14,695			14,566
Tangible common shareholders’ equity (c)		10,595				10,334			10,245			10,086			9,954
Equity per common share		118.12				116.39			115.75			114.54			113.54
Tangible equity per common share		82.35				80.52			79.85			78.62			77.60

(a) Excludes amortization and balances related to goodwill and core deposit and other intangible assets and merger-related expenses which, except in the calculation of the efficiency ratio, are net of applicable income tax effects. A reconciliation of net income and net operating income appears in Table 2.

(b) Excludes impact of merger-related expenses and net securities transactions.

(c) The difference between total assets and total tangible assets, and common shareholders’ equity and tangible common shareholders’ equity, represents goodwill, core deposit and other intangible assets, net of applicable deferred tax balances. A reconciliation of such balances appears in Table 2.

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 2

RECONCILIATION OF QUARTERLY GAAP TO NON-GAAP MEASURES

	2021			2020 Quarters
	First Quarter			Fourth			Third			Second			First
Income statement data (in thousands,    except per share)
Net income
Net income	$	447,249			471,140			372,136			241,054			268,822
Amortization of core deposit and other    intangible assets (a)		2,034			2,313			2,893			2,904			2,883
Merger-related expenses (a)		8,089			—			—			—			—
Net operating income	$	457,372			473,453			375,029			243,958			271,705
Earnings per common share
Diluted earnings per common share	$	3.33			3.52			2.75			1.74			1.93
Amortization of core deposit and other    intangible assets (a)		.02			.02			.02			.02			.02
Merger-related expenses (a)		.06			—			—			—			—
Diluted net operating earnings per   common share	$	3.41			3.54			2.77			1.76			1.95
Other expense
Other expense	$	919,444			845,008			826,774			807,042			906,416
Amortization of core deposit and other    intangible assets		(2,738	)		(3,129	)		(3,914	)		(3,913	)		(3,913	)
Merger-related expenses		(9,951	)		—			—			—			—
Noninterest operating expense	$	906,755			841,879			822,860			803,129			902,503
Efficiency ratio
Noninterest operating expense (numerator)	$	906,755			841,879			822,860			803,129			902,503
Taxable-equivalent net interest income	$	985,128			993,252			947,114			961,371			981,868
Other income		505,598			551,250			520,561			487,273			529,360
Less: Gain (loss) on bank investment   securities		(12,282	)		1,619			2,773			6,969			(20,782	)
Denominator	$	1,503,008			1,542,883			1,464,902			1,441,675			1,532,010
Efficiency ratio		60.3	%		54.6	%		56.2	%		55.7	%		58.9	%
Balance sheet data (in millions)
Average assets
Average assets	$	148,157			144,563			140,181			136,446			120,585
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(13	)		(16	)		(19	)		(23	)		(27	)
Deferred taxes		3			4			5			6			7
Average tangible assets	$	143,554			139,958			135,574			131,836			115,972
Average common equity
Average total equity	$	16,327			16,213			16,073			15,953			15,720
Preferred stock		(1,250	)		(1,250	)		(1,250	)		(1,250	)		(1,250	)
Average common equity		15,077			14,963			14,823			14,703			14,470
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(13	)		(16	)		(19	)		(23	)		(27	)
Deferred taxes		3			4			5			6			7
Average tangible common equity	$	10,474			10,358			10,216			10,093			9,857
At end of quarter
Total assets
Total assets	$	150,481			142,601			138,627			139,537			124,578
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(12	)		(14	)		(17	)		(21	)		(25	)
Deferred taxes		3			4			4			5			6
Total tangible assets	$	145,879			137,998			134,021			134,928			119,966
Total common equity
Total equity	$	16,447			16,187			16,101			15,945			15,816
Preferred stock		(1,250	)		(1,250	)		(1,250	)		(1,250	)		(1,250	)
Common equity		15,197			14,937			14,851			14,695			14,566
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(12	)		(14	)		(17	)		(21	)		(25	)
Deferred taxes		3			4			4			5			6
Total tangible common equity	$	10,595			10,334			10,245			10,086			9,954

(a) After any related tax effect.

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 3

AVERAGE BALANCE SHEETS AND ANNUALIZED TAXABLE-EQUIVALENT RATES

	2021 First Quarter								2020 Fourth Quarter								2020 Third Quarter
	Average Balance			Interest		Average Rate			Average Balance			Interest		Average Rate			Average Balance			Interest		Average Rate
Average balance in millions; interest    in thousands
Assets
Earning assets
Loans and leases, net of unearned     discount (a)
Commercial, financial, etc.	$	27,723		$	240,961		3.53	%		27,713			247,847		3.56	%		28,333			217,171		3.05	%
Real estate – commercial		37,609			391,094		4.16			37,707			400,176		4.15			37,243			398,619		4.19
Real estate – consumer		17,404			154,219		3.54			16,761			149,218		3.56			16,558			152,594		3.69
Consumer		16,620			190,038		4.64			16,485			197,992		4.78			16,076			192,223		4.76
Total loans and leases, net		99,356			976,312		3.99			98,666			995,233		4.01			98,210			960,607		3.89
Interest-bearing deposits at banks		27,666			6,874		.10			22,206			5,648		.10			16,440			4,163		.10
Federal funds sold and agreements    to resell securities		678			202		.12			3,799			1,101		.12			5,113			1,615		.13
Trading account		50			178		1.44			50			243		1.97			50			201		1.62
Investment securities (b)
U.S. Treasury and federal agencies		5,920			34,094		2.34			6,497			37,768		2.31			7,177			37,157		2.06
Obligations of states and political    subdivisions		1			14		5.66			2			24		5.25			2			23		4.51
Other		684			3,021		1.79			696			2,845		1.63			697			1,414		.81
Total investment securities		6,605			37,129		2.28			7,195			40,637		2.25			7,876			38,594		1.95
Total earning assets		134,355			1,020,695		3.08			131,916			1,042,862		3.15			127,689			1,005,180		3.13
Allowance for credit losses		(1,744	)							(1,768	)							(1,649	)
Cash and due from banks		1,408								1,372								1,390
Other assets		14,138								13,043								12,751
Total assets	$	148,157								144,563								140,181
Liabilities and shareholders’ equity
Interest-bearing liabilities
Interest-bearing deposits
Savings and interest-checking    deposits	$	70,458			11,504		.07			69,133			19,841		.11			65,848			22,403		.14
Time deposits		3,732			7,010		.76			4,113			10,006		.97			4,715			14,519		1.22
Deposits at Cayman Islands office		683			185		.11			826			233		.11			957			241		.10
Total interest-bearing deposits		74,873			18,699		.10			74,072			30,080		.16			71,520			37,163		.21
Short-term borrowings		62			2		.01			64			2		.01			62			1		.01
Long-term borrowings		3,851			16,866		1.78			5,294			19,528		1.47			5,499			20,902		1.51
Total interest-bearing liabilities		78,786			35,567		.18			79,430			49,610		.25			77,081			58,066		.30
Noninterest-bearing deposits		50,860								46,904								44,786
Other liabilities		2,184								2,016								2,241
Total liabilities		131,830								128,350								124,108
Shareholders’ equity		16,327								16,213								16,073
Total liabilities and     shareholders’ equity	$	148,157								144,563								140,181
Net interest spread							2.90								2.90								2.83
Contribution of interest-free funds							.07								.10								.12
Net interest income/margin on     earning assets				$	985,128		2.97	%					993,252		3.00	%					947,114		2.95	%

(a) Includes nonaccrual loans.

(b) Includes available-for-sale securities at amortized cost.

(continued)

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 3 (continued)

AVERAGE BALANCE SHEETS AND ANNUALIZED TAXABLE-EQUIVALENT RATES (continued)

	2020 Second Quarter								2020 First Quarter
	Average Balance			Interest		Average Rate			Average Balance			Interest		Average Rate
Average balance in millions; interest in thousands
Assets
Earning assets
Loans and leases, net of unearned     discount (a)
Commercial, financial, etc.	$	29,733		$	229,058		3.10	%		24,290			247,344		4.10	%
Real estate – commercial		36,947			412,362		4.42			36,034			440,291		4.83
Real estate – consumer		15,599			156,135		4.00			15,931			160,650		4.03
Consumer		15,518			187,041		4.85			15,451			203,546		5.30
Total loans and leases, net		97,797			984,596		4.05			91,706			1,051,831		4.61
Interest-bearing deposits at banks		16,454			4,179		.10			6,130			18,966		1.24
Federal funds sold and agreements    to resell securities		692			197		.11			1,224			4,072		1.34
Trading account		49			248		2.04			64			419		2.64
Investment securities (b)
U.S. Treasury and federal agencies		7,796			43,889		2.26			8,359			45,449		2.19
Obligations of states and political subdivisions		3			37		5.11			3			41		5.01
Other		701			3,330		1.91			740			4,704		2.56
Total investment securities		8,500			47,256		2.24			9,102			50,194		2.22
Total earning assets		123,492			1,036,476		3.38			108,226			1,125,482		4.18
Allowance for credit losses		(1,401	)							(1,191	)
Cash and due from banks		1,245								1,298
Other assets		13,110								12,252
Total assets	$	136,446								120,585
Liabilities and shareholders’ equity
Interest-bearing liabilities
Interest-bearing deposits
Savings and interest-checking deposits	$	62,927			26,454		.17			56,366			78,002		.56
Time deposits		5,354			19,883		1.49			5,672			21,872		1.55
Deposits at Cayman Islands office		1,017			161		.06			1,672			3,419		.82
Total interest-bearing deposits		69,298			46,498		.27			63,710			103,293		.65
Short-term borrowings		63			2		.01			58			23		.16
Long-term borrowings		6,189			28,605		1.86			6,240			40,298		2.60
Total interest-bearing liabilities		75,550			75,105		.40			70,008			143,614		.83
Noninterest-bearing deposits		42,497								32,456
Other liabilities		2,446								2,401
Total liabilities		120,493								104,865
Shareholders’ equity		15,953								15,720
Total liabilities and shareholders’ equity	$	136,446								120,585
Net interest spread							2.98								3.35
Contribution of interest-free funds							.15								.30
Net interest income/margin on earning assets				$	961,371		3.13	%					981,868		3.65	%

(a) Includes nonaccrual loans.

(b) Includes available-for-sale securities at amortized cost.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Incorporated by reference to the discussion contained under the caption “Taxable-equivalent Net Interest Income” in Part I, Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Item 4. Controls and Procedures.

(a) Evaluation of disclosure controls and procedures. Based upon their evaluation of the effectiveness of M&T’s disclosure controls and procedures (as defined in Exchange Act rules 13a-15(e) and 15d-15(e)), René F. Jones, Chairman of the Board and Chief Executive Officer, and Darren J. King, Executive Vice President and Chief Financial Officer, concluded that M&T’s disclosure controls and procedures were effective as of March 31, 2021.

(b) Changes in internal control over financial reporting. M&T regularly assesses the adequacy of its internal control over financial reporting and enhances its controls in response to internal control assessments and internal and external audit and regulatory recommendations. No changes in internal control over financial reporting have been identified in connection with the evaluation of disclosure controls and procedures during the quarter ended March 31, 2021 that have materially affected, or are reasonably likely to materially affect, M&T’s internal control over financial reporting.

The emergence of the COVID-19 pandemic during the first quarter of 2020 necessitated the execution of several M&T contingency plans.  Beginning in March 2020 and continuing through this filing date, the Company had a substantial number of its employees working remotely under such contingency plans.  

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

M&T and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings and other matters in which claims for monetary damages are asserted. On an on-going basis management, after consultation with legal counsel, assesses the Company’s liabilities and contingencies in connection with such proceedings. For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was between $0 and $25 million. Although the Company does not believe that the outcome of pending legal matters will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

Item 1A. Risk Factors.

In addition to the risk factors disclosed in response to Item 1A to Part I of M&T’s Form 10-K for the year ended December 31, 2020, M&T has identified certain supplemental risk factors relating to M&T’s acquisition of People’s United Financial, Inc. (“People’s United”) pursuant to an agreement and plan of merger, dated February 21, 2021, by and among M&T, Bridge Merger Corp., a direct, wholly owned subsidiary of M&T, and People’s United (the “merger agreement” and, such transaction, the “merger”). These risk factors and other risks associated with the merger are more fully discussed in the joint proxy statement/prospectus in connection with the merger that was filed by M&T with the Securities and Exchange Commission on April 23, 2021.

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Risks Related to the Merger

M&T is expected to incur significant costs related to the merger and integration.

M&T has incurred and expects to incur significant, non-recurring costs in connection with negotiating the merger agreement and closing the merger. In addition, M&T will incur integration costs following the completion of the merger as M&T integrates the People’s United business, including facilities and systems consolidation costs and employment-related costs.

There can be no assurances that the expected benefits and efficiencies related to the integration of the businesses will be realized to offset these transaction and integration costs over time. M&T may also incur additional costs to maintain employee morale and to retain key employees. M&T will also incur significant legal, financial advisory, accounting, banking and consulting fees, fees relating to regulatory filings and notices, SEC filing fees, printing and mailing fees and other costs associated with the merger. Some of these costs are payable regardless of whether the merger is completed.

Combining M&T and People’s United may be more difficult, costly or time-consuming than expected, and M&T may fail to realize the anticipated benefits of the merger.

The success of the merger will depend, in part, on the ability to realize the anticipated cost savings from combining the businesses of M&T and People’s United. To realize the anticipated benefits and cost savings from the merger M&T and People’s United must integrate and combine their businesses in a manner that permits cost savings to be realized, without adversely affecting revenues and future growth. If M&T and People’s United are not able to successfully achieve these objectives, the anticipated benefits of the merger may not be realized fully or at all or may take longer to realize than expected. In addition, the actual cost savings of the merger could be less than anticipated, and integration may result in additional and unforeseen expenses.

An inability to realize the full extent of the anticipated benefits of the merger and the other transactions contemplated by the merger agreement, as well as any delays encountered in the integration process, could have an adverse effect upon the revenues, levels of expenses and operating results of M&T following the completion of the merger, which may adversely affect the value of M&T’s common stock following the completion of the merger.

M&T and People’s United have operated and, until the completion of the merger, must continue to operate, independently. It is possible that the integration process could result in the loss of key employees, the disruption of each company’s ongoing businesses or inconsistencies in standards, controls, procedures and policies that adversely affect the companies’ ability to maintain relationships with clients, customers, depositors and employees or to achieve the anticipated benefits and cost savings of the merger. Integration efforts between the two companies may also divert management attention and resources. These integration matters could have an adverse effect on M&T during this transition period and for an undetermined period after completion of the merger.

M&T may be unable to retain M&T and/or People’s United personnel successfully after the merger is completed.

The success of the merger will depend in part on M&T’s ability to retain the talents and dedication of key employees currently employed by M&T and People’s United. It is possible that these employees may decide not to remain with M&T or People’s United, as applicable, while the merger is pending or with M&T after the merger is completed. If M&T and People’s United are unable to retain key employees, including management, who are critical to the successful integration and future operations of the companies, M&T and People’s United could face disruptions in their operations, loss of existing customers, loss of key information, expertise or know-how and unanticipated additional recruitment costs. In addition, following the merger, if key employees terminate their employment, M&T’s business activities may be adversely affected, and management’s attention may be diverted from successfully integrating M&T and People’s United to hiring suitable replacements, all of which may cause M&T’s business to suffer. In addition, M&T and People’s United may not be able to locate or retain suitable replacements for any key employees who leave either company.

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The COVID-19 pandemic may delay and adversely affect the completion of the merger.

The Coronavirus Disease 2019 (“COVID-19”) pandemic has created economic and financial disruptions that have adversely affected, and are likely to continue to adversely affect, the business, financial condition, liquidity, capital and results of operations of M&T and People’s United. If the effects of the COVID-19 pandemic cause a continued or extended decline in the economic environment and the financial results of M&T or People’s United, or the business operations of M&T or People’s United are further disrupted as a result of the COVID-19 pandemic, efforts to complete the merger and integrate the businesses of M&T and People’s United may also be delayed and adversely affected. Additional time may be required to obtain the requisite regulatory approvals, and the Board of Governors of the Federal Reserve System (the “Federal Reserve Board”), the New York Department of Financial Services (“NYDFS”), the Connecticut Department of Banking (“CTDOB”) and/or other regulators may impose additional requirements on M&T or People’s United that must be satisfied prior to completion of the merger, which could delay and adversely affect the completion of the merger.

Regulatory approvals may not be received, may take longer than expected, or may impose conditions that are not presently anticipated or that could have an adverse effect on M&T following the merger.

Before the merger and the other transactions contemplated by the merger agreement may be completed, various approvals, consents and non-objections must be obtained from the Federal Reserve Board, the NYDFS, the CTDOB, and other regulatory authorities. In determining whether to grant these approvals, such regulatory authorities consider a variety of factors. These approvals could be delayed or not obtained at all, including due to: an adverse development in either party’s regulatory standing or in any other factors considered by regulators when granting such approvals, including factors not known at the present time and factors that may arise in the future; governmental, political or community group inquiries, investigations or opposition; or changes in legislation or the political environment generally. The Federal Reserve Board has stated that if material weaknesses are identified by examiners before a banking organization applies to engage in expansionary activity, the Federal Reserve Board will expect the banking organization to resolve all such weaknesses before applying for such expansionary activity. The Federal Reserve Board has also stated that if issues arise during the processing of an application for expansionary activity, it will expect the applicant banking organization to withdraw its application pending resolution of any supervisory concerns.

The approvals that are granted may impose terms and conditions, limitations, obligations or costs, or place restrictions on the conduct of M&T’s business or require changes to the terms of the transactions contemplated by the merger agreement. There can be no assurance that regulators will not impose any such conditions, limitations, obligations or restrictions and that such conditions, limitations, obligations or restrictions will not have the effect of delaying the completion of any of the transactions contemplated by the merger agreement, imposing additional material costs on or materially limiting the revenues of M&T following the merger or otherwise reduce the anticipated benefits of the merger if the merger were consummated successfully within the expected timeframe. In addition, there can be no assurance that any such conditions, terms, obligations or restrictions will not result in the delay or abandonment of the merger. Additionally, the completion of the merger is conditioned on the absence of certain orders, injunctions or decrees by any court or regulatory agency of competent jurisdiction that would prohibit or make illegal the completion of any of the transactions contemplated by the merger agreement.

In addition, despite the parties’ commitments to use their reasonable best efforts to comply with conditions imposed by regulators, under the terms of the merger agreement, M&T will not be required, and People’s United will not be permitted without M&T’s prior written consent, to take actions or agree to conditions in connection with obtaining the foregoing permits, consents, approvals and authorizations of governmental entities that would reasonably be expected to have a material adverse effect on M&T and its subsidiaries, taken as a whole, after giving effect to the merger.

Failure to complete the merger could negatively impact M&T.

If the merger is not completed for any reason, including as a result of M&T shareholders failing to approve either the amendment to M&T’s restated certificate of incorporation to increase the number of authorized shares of M&T’s capital stock and preferred stock or the issuance of shares of M&T common stock to People’s United

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stockholders in the merger or People’s United stockholders failing to approve the merger, there may be various adverse consequences and M&T may experience negative reactions from the financial markets and from its customers and employees. For example, M&T’s business may have been impacted adversely by the failure to pursue other beneficial opportunities due to the focus of management on the merger, without realizing any of the anticipated benefits of completing the merger. Additionally, if the merger agreement is terminated, the market price of M&T common stock could decline to the extent that the current market price of M&T common stock reflects a market assumption that the merger will be beneficial to M&T and will be completed. M&T could be subject to litigation related to any failure to complete the merger or to proceedings commenced against M&T to perform its obligations under the merger agreement. If the merger agreement is terminated under certain circumstances, M&T may be required to pay a termination fee of $280 million to People’s United.

Additionally, M&T has incurred and will incur substantial expenses in connection with the negotiation and completion of the transactions contemplated by the merger agreement, as well as the costs and expenses of preparing, filing, printing and mailing the joint proxy statement/prospectus for the merger, and all filing and other fees paid in connection with the merger. If the merger is not completed, M&T would have to pay these expenses without realizing the expected benefits of the merger.

M&T will be subject to business uncertainties and contractual restrictions while the merger is pending.

Uncertainty about the effect of the merger on employees and customers may have an adverse effect on M&T. These uncertainties may impair M&T’s ability to attract, retain and motivate key personnel until the merger is completed, and could cause customers and others that deal with M&T to seek to change existing business relationships with M&T. In addition, subject to certain exceptions, M&T has agreed to refrain from taking certain actions that may adversely affect its ability to consummate the merger on a timely basis without People United’s consent. These restrictions may prevent M&T from pursuing attractive business opportunities that may arise prior to the completion of the merger.

Litigation related to the merger has been filed against People’s United, the People’s United board of directors and M&T, and additional litigation may be filed against People’s United, the People’s United board of directors, M&T and the M&T board of directors in the future, which could prevent or delay the completion of the merger, result in the payment of damages or otherwise negatively impact the business and operations of M&T.

Litigation related to the merger has been filed against People’s United, the People’s United board of directors and M&T, and additional litigation may be filed against People’s United, the People’s United board of directors, M&T and the M&T board of directors in the future. Among other remedies, litigation that has been filed seeks, and additional litigation by shareholders of M&T and/or stockholders of People’s United in the future may seek, damages and/or to enjoin the merger or the other transactions contemplated by the merger agreement. The outcome of any litigation is uncertain. If any plaintiff were successful in obtaining an injunction prohibiting M&T or People’s United from completing the merger or any other transactions contemplated by the merger agreement, then such injunction may delay or prevent the effectiveness of the merger and could result in significant costs to M&T, including costs in connection with the defense or settlement of any shareholder lawsuits filed in connection with the merger. Further, such lawsuits and the defense or settlement of any such lawsuits may have an adverse effect on the financial condition and results of operations of M&T.  

The COVID-19 pandemic’s impact on M&T’s business and operations following the completion of the merger is uncertain.

The extent to which the COVID-19 pandemic will negatively affect the business, financial condition, liquidity, capital and results of operations of M&T following the completion of the merger will depend on future developments, which are highly uncertain and cannot be predicted, including the scope and duration of the COVID‑19 pandemic, the direct and indirect impact of the COVID-19 pandemic on employees, clients, counterparties and service providers, as well as other market participants, and actions taken by governmental authorities and other third parties in response to the COVID-19 pandemic. Given the ongoing and dynamic nature of the circumstances, it is difficult to predict the impact of the COVID-19 pandemic on M&T’s business, and there is no guarantee that efforts by M&T to address the adverse impacts of the COVID-19 pandemic will be effective.

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Even after the COVID-19 pandemic has subsided, M&T may continue to experience adverse impacts to its business as a result of the COVID-19 pandemic’s global economic impact, including reduced availability of credit, adverse impacts on liquidity and the negative financial effects from any recession or depression that may occur.

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

(a) – (b) Not applicable.

(c)

	Issuer Purchases of Equity Securities
Period	(a)Total Number of Shares (or Units) Purchased (1)		(b)Average Price Paid per Share (or Unit)		(c)Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs		(d)Maximum Number (or Approximate Dollar Value) of Shares (or Units) that may yet be Purchased Under the Plans or Programs (2)
January 1 - January 31, 2021		1,922	$	132.47		—	$	800,000,000
February 1 - February 28, 2021		—		—		—		800,000,000
March 1 - March 31, 2021		—		—		—		800,000,000
Total		1,922	$	132.47		—

(1) The total number of shares purchased during the periods indicated includes shares purchased as part of publicly announced programs and/or shares deemed to have been received from employees who exercised stock options by attesting to previously acquired common shares in satisfaction of the exercise price or shares received from employees upon the vesting of restricted stock awards in satisfaction of applicable tax withholding obligations, as is permitted under M&T’s stock-based compensation plans.

(2) On January 20, 2021, M&T's Board of Directors authorized a new stock repurchase program to repurchase up to $800 million of common shares.

Item 3. Defaults Upon Senior Securities.

(Not applicable.)

Item 4. Mine Safety Disclosures.

(None.)

Item 5. Other Information.

(None.)

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Item 6. Exhibits.

The following exhibits are filed as a part of this report.

Exhibit No.
2.1	Agreement and Plan of Merger dated as of February 21, 2021, by and between M&T Bank Corporation, Bridge Merger Corp. and People’s United Financial, Inc.  Incorporated by reference to Exhibit 2.1 of M&T Bank Corporation’s Form 8-K dated February 25, 2021 (File No. 1-9861).
10.1	M&T Bank Corporation 2008 Directors’ Stock Plan, as amended on February 19, 2021.  Incorporated by reference to Exhibit 4.1 of M&T Bank Corporation’s Form S-8 dated March 26, 2021 (File No. 333-254786).
31.1	Certification of Chief Executive Officer under Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.
31.2	Certification of Chief Financial Officer under Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.
32.1	Certification of Chief Executive Officer under 18 U.S.C. §1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Filed herewith.
32.2	Certification of Chief Financial Officer under 18 U.S.C. §1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Filed herewith.
101.INS	Inline XBRL Instance Document. Filed herewith.
101.SCH	Inline XBRL Taxonomy Extension Schema. Filed herewith.
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase. Filed herewith.
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase. Filed herewith.
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase. Filed herewith.
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase. Filed herewith.
104	The cover page from M&T Bank Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2021 has been formatted in Inline XBRL.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	M&T BANK CORPORATION
Date: May 6, 2021	By:	/s/ Darren J. King
		Darren J. King
		Executive Vice President and Chief Financial Officer

- 86 -

EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

I, René F. Jones, certify that:

1. I have reviewed this quarterly report on Form 10-Q of M&T Bank Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 6, 2021

By:	/s/ René F. Jones
	René F. Jones
	Chairman of the Board and
	Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATIONS

I, Darren J. King, certify that:

1. I have reviewed this quarterly report on Form 10-Q of M&T Bank Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 6, 2021

By:	/s/ Darren J. King
	Darren J. King
	Executive Vice President
	and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER UNDER 18 U.S.C. §1350

I, René F. Jones, Chairman of the Board and Chief Executive Officer of M&T Bank Corporation, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of M&T Bank Corporation for the quarterly period ended March 31, 2021 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of M&T Bank Corporation.

The foregoing certification is being furnished solely pursuant to 18 U.S.C. §1350 and is not being filed as part of the Report or as a separate disclosure document.

/s/ René F. Jones  

René F. Jones

May 6, 2021

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to M&T Bank Corporation and will be retained by M&T Bank Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER UNDER 18 U.S.C. §1350

I, Darren J. King, Executive Vice President and Chief Financial Officer of M&T Bank Corporation, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of M&T Bank Corporation for the quarterly period ended March 31, 2021 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of M&T Bank Corporation.

The foregoing certification is being furnished solely pursuant to 18 U.S.C. §1350 and is not being filed as part of the Report or as a separate disclosure document.

/s/ Darren J. King

Darren J. King

May 6, 2021

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to M&T Bank Corporation and will be retained by M&T Bank Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

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	Mar. 31, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q
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Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
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Current Fiscal Year End Date	--12-31
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Document Transition Report	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false

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Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 1,258,989	$ 1,552,743
Interest-bearing deposits at banks	31,407,227	23,663,810
Federal funds sold	1,000
Trading account	687,359	1,068,581
Investment securities (includes pledged securities that can be sold or repledged of $89,522 at March 31, 2021; $105,136 at December 31, 2020)
Available for sale (cost: $4,194,886 at March 31, 2021; $4,621,027 at December 31, 2020	4,364,437	4,822,606
Held to maturity (fair value: $1,850,210 at March 31, 2021; $1,842,281 at December 31, 2020)	1,778,135	1,748,989
Equity and other securities (cost: $455,286 at March 31, 2021; $449,008 at December 31, 2020)	468,095	474,102
Total investment securities	6,610,667	7,045,697
Loans and leases	99,691,141	98,875,788
Unearned discount	(392,061)	(339,921)
Loans and leases, net of unearned discount	99,299,080	98,535,867
Allowance for credit losses	(1,636,206)	(1,736,387)
Loans and leases, net	97,662,874	96,799,480
Premises and equipment	1,148,941	1,161,558
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	11,427	14,165
Accrued interest and other assets	7,099,464	6,701,959
Total assets	150,481,060	142,601,105
Liabilities
Noninterest-bearing deposits	53,641,419	47,572,884
Savings and interest-checking deposits	70,679,036	67,680,840
Time deposits	3,514,219	3,899,910
Deposits at Cayman Islands office	641,691	652,104
Total deposits	128,476,365	119,805,738
Short-term borrowings	58,957	59,482
Accrued interest and other liabilities	2,000,727	2,166,409
Long-term borrowings	3,498,503	4,382,193
Total liabilities	134,034,552	126,413,822
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 350,000 shares at March 31, 2021 and December 31, 2020; Liquidation preference of $10,000 per share: 90,000 shares at March 31, 2021 and December 31, 2020	1,250,000	1,250,000
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at March 31, 2021 and December 31, 2020	79,871	79,871
Common stock issuable, 15,492 shares at March 31, 2021; 18,113 shares at December 31, 2020	1,165	1,344
Additional paid-in capital	6,611,150	6,617,404
Retained earnings	13,731,893	13,444,428
Accumulated other comprehensive income (loss), net	(138,478)	(63,032)
Treasury stock — common, at cost — 31,098,951 shares at March 31, 2021; 31,426,742 shares at December 31, 2020	(5,089,093)	(5,142,732)
Total shareholders’ equity	16,446,508	16,187,283
Total liabilities and shareholders’ equity	$ 150,481,060	$ 142,601,105

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Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Pledged securities that can be sold or repledged	$ 89,522	$ 105,136
Investment securities, available for sale, amortized cost	4,194,886	4,621,027
Investment securities, held to maturity, fair value	1,850,210	1,842,281
Equity and other securities, cost	$ 455,286	$ 449,008
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	159,741,898	159,741,898
Common stock issuable, shares	15,492	18,113
Treasury stock, common shares	31,098,951	31,426,742
Series A Series C Series And E Preferred Stock [Member]
Preferred stock, shares issued	350,000	350,000
Preferred stock, shares outstanding	350,000	350,000
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
Series F And Series G Preferred Stock [Member]
Preferred stock, shares issued	90,000	90,000
Preferred stock, shares outstanding	90,000	90,000
Preferred stock, liquidation preference per share	$ 10,000	$ 10,000

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Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income
Loans and leases, including fees	$ 972,582	$ 1,046,821
Investment securities
Fully taxable	37,071	50,110
Exempt from federal taxes	55	75
Deposits at banks	6,874	18,966
Other	380	4,447
Total interest income	1,016,962	1,120,419
Interest expense
Savings and interest-checking deposits	11,504	78,002
Time deposits	7,010	21,872
Deposits at Cayman Islands office	185	3,419
Short-term borrowings	2	23
Long-term borrowings	16,866	40,298
Total interest expense	35,567	143,614
Net interest income	981,395	976,805
Provision for credit losses	(25,000)	250,000
Net interest income after provision for credit losses	1,006,395	726,805
Other income
Brokerage services income	13,113	13,129
Trading account and foreign exchange gains	6,284	21,016
Loss on bank investment securities	(12,282)	(20,782)
Other revenues from operations	110,930	133,176
Total other income	505,598	529,360
Other expense
Salaries and employee benefits	541,078	536,843
Equipment and net occupancy	82,471	79,640
Outside data processing and software	65,751	64,410
FDIC assessments	14,188	12,271
Advertising and marketing	14,628	22,375
Printing, postage and supplies	9,317	10,852
Amortization of core deposit and other intangible assets	2,738	3,913
Other costs of operations	189,273	176,112
Total other expense	919,444	906,416
Income before taxes	592,549	349,749
Income taxes	145,300	80,927
Net income	447,249	268,822
Net income available to common shareholders
Basic	428,091	250,701
Diluted	$ 428,093	$ 250,701
Net income per common share
Basic	$ 3.33	$ 1.93
Diluted	$ 3.33	$ 1.93
Average common shares outstanding
Basic	128,537	129,696
Diluted	128,669	129,755
Mortgage Banking Revenues [Member]
Other income
Revenue from contract with customer	$ 138,754	$ 127,909
Service Charges on Deposit Accounts [Member]
Other income
Revenue from contract with customer	92,777	106,161
Trust Income [Member]
Other income
Revenue from contract with customer	$ 156,022	$ 148,751

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Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Partners Capital [Abstract]
Net income	$ 447,249	$ 268,822
Other comprehensive income (loss), net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities	(22,406)	97,448
Cash flow hedges adjustments	(66,777)	312,720
Foreign currency translation adjustments	548	(2,943)
Defined benefit plans liability adjustments	13,189	9,288
Total other comprehensive income (loss)	(75,446)	416,513
Total comprehensive income	$ 371,803	$ 685,335

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Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income	$ 447,249	$ 268,822
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	(25,000)	250,000
Depreciation and amortization of premises and equipment	57,116	54,756
Amortization of capitalized servicing rights	19,951	18,991
Amortization of core deposit and other intangible assets	2,738	3,913
Provision for deferred income taxes	39,329	(36,243)
Asset write-downs	1,217	2,990
Net gain on sales of assets	(2,106)	(3,933)
Net change in accrued interest receivable, payable	(36,893)	(13,863)
Net change in other accrued income and expense	(27,301)	(73,363)
Net change in loans originated for sale	158,878	(158,193)
Net change in trading account assets and liabilities	359,559	(708,319)
Net cash provided (used) by operating activities	994,737	(394,442)
Cash flows from investing activities
Proceeds from sales of investment securities equity and other	2,526	2,536
Net cash used by investing activities	(8,931,747)	(3,852,363)
Proceeds from maturities of investment securities Available for sale	422,171	303,994
Proceeds from maturities of investment securities Held to maturity	171,644	359,615
Purchases of investment securities Available for sale	(1,002)	(2,951)
Purchases of investment securities Held to maturity	(201,234)	(5,996)
Purchases of investment securities equity and other	(8,801)	(17,728)
Net increase in loans and leases	(988,654)	(3,105,967)
Net increase in interest-bearing deposits at banks	(7,743,417)	(1,706,153)
Capital expenditures, net	(31,016)	(51,547)
Net increase in loan servicing advances	(374,614)	(48,866)
Other, net	(179,350)	420,700
Cash flows from financing activities
Net increase in deposits	8,670,627	5,413,829
Net decrease in short-term borrowings	(525)	(3,183)
Payments on long-term borrowings	(852,945)	(753,123)
Purchases of treasury stock		(373,750)
Dividends paid — common	(142,044)	(143,170)
Dividends paid — preferred	(21,288)	(21,344)
Other, net	(9,569)	(10,567)
Net cash provided by financing activities	7,644,256	4,108,692
Net decrease in cash, cash equivalents and restricted cash	(292,754)	(138,113)
Cash, cash equivalents and restricted cash at beginning of period	1,552,743	1,436,305
Cash, cash equivalents and restricted cash at end of period	1,259,989	1,298,192
Supplemental disclosure of cash flow information
Interest received during the period	971,142	1,159,094
Interest paid during the period	55,378	158,861
Income taxes paid during the period	24,220	44,660
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	2,301	17,295
Additions to right-of-use assets under operating leases	$ 13,020	$ 17,421

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Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Thousands		Total	ASU 2016-13 [Member]	Preferred Stock [Member]	Common Stock [Member]	Common Stock Issuable [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] ASU 2016-13 [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2019		$ 15,716,649		$ 1,250,000	$ 79,871	$ 1,566	$ 6,593,539	$ 12,820,916		$ (206,680)	$ (4,822,563)
Adoption of new accounting standard for credit losses			$ (91,925)						$ (91,925)
Total comprehensive income		685,335						268,822		416,513
Preferred stock cash dividends	[1]	(17,078)						(17,078)
Purchases of treasury stock		(373,750)									(373,750)
Stock-based compensation transactions, net		39,806				(274)	(5,132)	(102)			45,314
Common stock cash dividends		(143,243)						(143,243)
Ending balance at Mar. 31, 2020		15,815,794		1,250,000	79,871	1,292	6,588,407	12,837,390		209,833	(5,150,999)
Beginning balance at Dec. 31, 2020		16,187,283		1,250,000	79,871	1,344	6,617,404	13,444,428		(63,032)	(5,142,732)
Total comprehensive income		371,803						447,249		(75,446)
Preferred stock cash dividends	[1]	(17,050)						(17,050)
Stock-based compensation transactions, net		46,998				(179)	(6,254)	(208)			53,639
Common stock cash dividends		(142,526)						(142,526)
Ending balance at Mar. 31, 2021		$ 16,446,508		$ 1,250,000	$ 79,871	$ 1,165	$ 6,611,150	$ 13,731,893		$ (138,478)	$ (5,089,093)

[1] For the three-months ended March 31, 2021, dividends per preferred share were: Preferred Series E - $16.125; Preferred Series F - $128.125; and Preferred Series G - $125.00.  Dividends per preferred share for the three-months ended March 31, 2020 were:  Preferred Series E - $16.125; Preferred Series F - $128.125; and Preferred Series G - $125.694.

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Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Preferred Series E [Member]
Preferred stock per share dividend amount	$ 16.125	$ 16.125
Preferred Series F [Member]
Preferred stock per share dividend amount	128.125	128.125
Preferred Series G [Member]
Preferred stock per share dividend amount	125.00	125.694
Retained Earnings [Member]
Common stock per share dividend amount	$ 1.10	$ 1.10

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Significant accounting policies

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Significant accounting policies

1. Significant accounting policies

The consolidated interim financial statements of M&T Bank Corporation (“M&T”) and subsidiaries (“the Company”) were compiled in accordance with generally accepted accounting principles (“GAAP”) using the accounting policies set forth in note 1 of Notes to Financial Statements included in Form 10-K for the year ended December 31, 2020 (“2020 Annual Report”). The financial statements contain all adjustments which are, in the opinion of management, necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the interim periods presented.

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Acquisition

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Acquisition

2. Acquisition

On February 22, 2021, M&T announced that it had entered into a definitive agreement with People’s United Financial, Inc.  ("People’s United"), headquartered in Bridgeport, Connecticut, under which People’s United will be acquired by M&T in an all-stock transaction. Pursuant to the terms of the agreement, People’s United shareholders will receive consideration valued at .118 of an M&T share in the form of M&T common stock. People’s United outstanding preferred stock will be converted into a new series of M&T preferred stock upon completion of the acquisition. The transaction is valued at approximately $7.7 billion (with the price based on M&T’s closing price of $151.61 per share as of March 31, 2021).  

The merger has been unanimously approved by the boards of directors of each company. The merger is expected to close in the fourth quarter of 2021, subject to the satisfaction of customary closing conditions, including the receipt of regulatory approvals and approval by the shareholders of M&T and People’s United. As of March 31, 2021, People’s United disclosed that it had total assets of $64.2 billion, including $42.8 billion of loans, $56.6 billion of liabilities, including $53.5 billion of deposits, and $7.6 billion of stockholders’ equity.

In connection with the acquisition, the Company incurred merger-related expenses consisting predominantly of professional services for investment banking, legal and other services associated with the proposed transaction that totaled approximately $10 million in the first quarter of 2021.

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Investment securities

3 Months Ended

Mar. 31, 2021

Investments Debt And Equity Securities [Abstract]

Investment securities

3. Investment securities

The amortized cost and estimated fair value of investment securities were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
March 31, 2021
Investment securities available for sale:
U.S. Treasury and federal agencies	$	6,851	$	163	$	1	$	7,013
Mortgage-backed securities:
Government issued or guaranteed		4,051,580		174,154		645		4,225,089
Privately issued		16		—		—		16
Other debt securities		136,439		2,295		6,415		132,319
		4,194,886		176,612		7,061		4,364,437
Investment securities held to maturity:
U.S. Treasury and federal agencies		3,000		—		—		3,000
Obligations of states and political subdivisions		851		4		—		855
Mortgage-backed securities:
Government issued or guaranteed		1,697,992		79,650		1,623		1,776,019
Privately issued		73,496		11,288		17,244		67,540
Other debt securities		2,796		—		—		2,796
		1,778,135		90,942		18,867		1,850,210
Total debt securities	$	5,973,021	$	267,554	$	25,928	$	6,214,647
Equity and other securities:
Readily marketable equity — at fair value	$	68,983	$	13,012	$	203	$	81,792
Other — at cost		386,303		—		—		386,303
Total equity and other securities	$	455,286	$	13,012	$	203	$	468,095
December 31, 2020
Investment securities available for sale:
U.S. Treasury and federal agencies	$	9,154	$	198	$	14	$	9,338
Mortgage-backed securities:
Government issued or guaranteed		4,475,406		208,787		755		4,683,438
Privately issued		16		—		—		16
Other debt securities		136,451		1,664		8,301		129,814
		4,621,027		210,649		9,070		4,822,606
Investment securities held to maturity:
U.S. Treasury and federal agencies		2,999		—		—		2,999
Obligations of states and political subdivisions		1,531		9		—		1,540
Mortgage-backed securities:
Government issued or guaranteed		1,664,443		100,176		11		1,764,608
Privately issued		77,155		11,056		17,938		70,273
Other debt securities		2,861		—		—		2,861
		1,748,989		111,241		17,949		1,842,281
Total debt securities	$	6,370,016	$	321,890	$	27,019	$	6,664,887
Equity and other securities:
Readily marketable equity — at fair value	$	67,891	$	25,094	$	—	$	92,985
Other — at cost		381,117		—		—		381,117
Total equity and other securities	$	449,008	$	25,094	$	—	$	474,102

3. Investment securities, continued

There were no significant gross realized gains or losses from sales of investment securities for the quarters ended March 31, 2021 and 2020.  Unrealized losses on equity securities were $12 million and $21 million during the three months ended March 31, 2021 and 2020, respectively.  

At March 31, 2021, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:

	Amortized Cost		Estimated Fair Value
	(In thousands)
Debt securities available for sale:
Due in one year or less	$	2,482		2,501
Due after one year through five years		12,030		12,439
Due after five years through ten years		98,778		99,066
Due after ten years		30,000		25,326
		143,290		139,332
Mortgage-backed securities available for sale		4,051,596		4,225,105
	$	4,194,886		4,364,437
Debt securities held to maturity:
Due in one year or less	$	3,676		3,678
Due after one year through five years		175		177
Due after ten years		2,796		2,796
		6,647		6,651
Mortgage-backed securities held to maturity		1,771,488		1,843,559
	$	1,778,135		1,850,210

 3. Investment securities, continued

A summary of investment securities that as of March 31, 2021 and December 31, 2020 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:

	Less Than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
March 31, 2021
Investment securities available for sale:
U.S. Treasury and federal agencies	$	299		(1	)		—		—
Mortgage-backed securities:
Government issued or guaranteed		1,825		(8	)		25,724		(637	)
Other debt securities		2,401		(23	)		65,209		(6,392	)
		4,525		(32	)		90,933		(7,029	)
Investment securities held to maturity:
Mortgage-backed securities:
Government issued or guaranteed		199,549		(1,609	)		1,686		(14	)
Privately issued		—		—			51,443		(17,244	)
		199,549		(1,609	)		53,129		(17,258	)
Total	$	204,074		(1,641	)		144,062		(24,287	)
December 31, 2020
Investment securities available for sale:
U.S. Treasury and federal agencies	$	985		(14	)		—		—
Mortgage-backed securities:
Government issued or guaranteed		18,687		(356	)		16,556		(399	)
Other debt securities		16,055		(181	)		63,462		(8,120	)
		35,727		(551	)		80,018		(8,519	)
Investment securities held to maturity:
Mortgage-backed securities:
Government issued or guaranteed		2,039		(11	)		—		—
Privately issued		—		—			52,418		(17,938	)
		2,039		(11	)		52,418		(17,938	)
Total	$	37,766		(562	)		132,436		(26,457	)

The Company owned 281 individual debt securities with aggregate gross unrealized losses of $26 million at March 31, 2021. Based on a review of each of the securities in the investment securities portfolio at March 31, 2021, the Company concluded that it expected to recover the amortized cost basis of its investment.  As of March 31, 2021, the Company does not intend to sell nor is it anticipated that it would be required to sell any of its impaired investment securities at a loss.  At March 31, 2021, the Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of the $386 million of cost method equity securities.

The Company estimated no material allowance for credit losses for its investment securities classified as held-to-maturity at March 31, 2021 or December 31, 2020, as the substantial majority of such investment securities are obligations backed by the U.S. government or its agencies.

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Loans and leases and the allowance for credit losses

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Loans and leases and the allowance for credit losses

4. Loans and leases and the allowance for credit losses

A summary of current, past due and nonaccrual loans as of  March 31, 2021 and December 31, 2020 follows:

	Current		30-89 Days Past Due		Accruing Loans Past Due 90 Days or More		Nonaccrual		Total
	(In thousands)
March 31, 2021
Commercial, financial, leasing, etc.	$	27,327,644		182,686		5,791		295,069	$	27,811,190
Real estate:
Commercial		26,369,232		175,904		26,996		824,079		27,396,211
Residential builder and developer		1,269,858		7,909		—		1,224		1,278,991
Other commercial construction		8,580,462		37,986		6,099		126,225		8,750,772
Residential		14,198,898		191,860		1,041,873		385,508		15,818,139
Residential — limited documentation		1,372,339		16,136		—		143,069		1,531,544
Consumer:
Home equity lines and loans		3,720,689		15,926		—		79,188		3,815,803
Recreational finance		7,228,228		26,821		—		27,218		7,282,267
Automobile		4,178,258		28,970		—		38,219		4,245,447
Other		1,319,323		8,292		3,794		37,307		1,368,716
Total	$	95,564,931		692,490		1,084,553		1,957,106	$	99,299,080

December 31, 2020
Commercial, financial, leasing, etc.	$	27,196,862	60,822	10,053	306,827	$	27,574,564
Real estate:
Commercial		26,688,515	168,917	47,014	775,894		27,680,340
Residential builder and developer		1,246,095	1,693	856	1,094		1,249,738
Other commercial construction		8,523,591	66,365	3,816	114,039		8,707,811
Residential		13,764,836	200,406	792,888	365,729		15,123,859
Residential — limited documentation		1,462,277	19,687	—	147,170		1,629,134
Consumer:
Home equity lines and loans		3,881,885	24,329	—	79,392		3,985,606
Recreational finance		7,002,643	47,161	—	25,519		7,075,323
Automobile		4,007,349	55,498	—	39,404		4,102,251
Other		1,346,868	17,561	4,581	38,231		1,407,241
Total	$	95,120,921	662,439	859,208	1,893,299	$	98,535,867

4. Loans and leases and the allowance for credit losses, continued

A summary of outstanding loan balances for which COVID-19 related modifications were granted as of March 31, 2021 is presented below. These loans meet the criteria described in note 1 of Notes to Financial Statements in the 2020 Annual Report and, accordingly, are not considered past due or otherwise in default of loan terms as of the date presented. Substantially all of the modifications noted below expire during 2021.

	COVID-19 Related Modifications
March 31, 2021	Payment Deferrals(1)			Other Forbearances(2)		Total
	(In thousands)
Commercial, financial, leasing, etc.	$	60,819		$	156,491	$	217,310
Real estate:
Commercial		507,491			361,664		869,155
Other commercial construction		72,452			100,901		173,353
Residential		3,017,626	(3)		—		3,017,626
Residential — limited    documentation		296,987			—		296,987
Consumer:
Home equity lines and loans		18,529			—		18,529
Recreational finance		14,161			—		14,161
Automobile		24,882			—		24,882
Other		994			—		994
Total	$	4,013,941		$	619,056	$	4,632,997

(1) Represents accruing loans at March 31, 2021 for which a COVID-19 related payment deferral (including maturity extensions) has been granted.

(2) Consists predominantly of accruing loans for which a COVID-19 related covenant waiver has been granted.

(3) Includes $2.4 billion of government-guaranteed loans.

One-to-four family residential mortgage loans held for sale were $773 million and $777 million at March 31, 2021 and December 31, 2020, respectively.  Commercial real estate loans held for sale were $99 million at March 31, 2021 and $278 million at December 31, 2020.

Credit quality indicators

The Company utilizes a loan grading system to differentiate risk amongst its commercial loans and commercial real estate loans.  Loans with a lower expectation of default are assigned one of ten possible “pass” loan grades and are generally ascribed lower loss factors when determining the allowance for credit losses. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed a higher loss factor when determining the allowance for credit losses. Criticized loans may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more.

4. Loans and leases and the allowance for credit losses, continued

Loan officers in different geographic locations with the support of the Company’s credit department personnel review and reassign loan grades based on their detailed knowledge of individual borrowers and their judgment of the impact on such borrowers resulting from changing conditions in their respective regions. Factors considered in assigning loan grades include borrower-specific information related to expected future cash flows and operating results, collateral values, geographic location, financial condition and performance, payment status, and other information. At least annually, updated financial information is obtained from commercial borrowers associated with pass grade loans and additional analysis is performed.  On a quarterly basis, the Company’s centralized credit department reviews all criticized commercial loans and commercial real estate loans greater than $1 million to determine the appropriateness of the assigned loan grade, including whether the loan should be reported as accruing or nonaccruing.

The following table summarizes the loan grades applied at March 31, 2021 to the various classes of the Company’s commercial loans and commercial real estate loans by origination year.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Commercial, financial, leasing, etc.:
Loan grades:
Pass	$	3,124,732		5,923,267		2,096,560		1,384,745		690,770		1,959,774		10,864,179		18,253	$	26,062,280
Criticized accrual		182,972		335,409		107,197		109,828		54,978		112,406		536,752		14,299		1,453,841
Criticized nonaccrual		684		6,652		30,437		58,718		16,522		68,214		105,392		8,450		295,069
Total commercial,    financial, leasing, etc.	$	3,308,388		6,265,328		2,234,194		1,553,291		762,270		2,140,394		11,506,323		41,002	$	27,811,190
Real estate:
Commercial:
Loan grades:
Pass	$	631,465		3,077,590		4,586,114		3,077,605		2,507,906		7,513,879		850,376		—	$	22,244,935
Criticized accrual		720		584,844		556,339		833,519		269,903		2,014,016		67,856		—		4,327,197
Criticized nonaccrual		—		33,509		123,364		46,519		141,610		469,332		9,745		—		824,079
Total commercial real    estate	$	632,185		3,695,943		5,265,817		3,957,643		2,919,419		9,997,227		927,977		—	$	27,396,211
Residential builder and developer:
Loan grades:
Pass	$	157,050		429,172		194,524		83,260		8,844		19,738		253,319		—	$	1,145,907
Criticized accrual		—		2,550		107,946		15,097		630		1,847		3,790		—		131,860
Criticized nonaccrual		—		—		518		—		—		706		—		—		1,224
Total residential builder    and developer	$	157,050		431,722		302,988		98,357		9,474		22,291		257,109		—	$	1,278,991
Other commercial construction:
Loan grades:
Pass	$	169,597		1,346,451		3,120,357		1,603,206		649,578		484,087		71,183		—	$	7,444,459
Criticized accrual		1,130		22,703		167,294		548,509		301,956		138,496		—		—		1,180,088
Criticized nonaccrual		—		336		78,901		13,435		4,130		24,032		5,391		—		126,225
Total other commercial    construction	$	170,727		1,369,490		3,366,552		2,165,150		955,664		646,615		76,574		—	$	8,750,772

Increases to criticized loans as compared with December 31, 2020 were predominantly attributable to effects of the COVID-19 pandemic and the related re-grading of loans.

4. Loans and leases and the allowance for credit losses, continued

The Company considers repayment performance a significant indicator of credit quality for its residential real estate loan and consumer loan portfolios.  A summary of loans in accrual and nonaccrual status at March 31, 2021 for the various classes of the Company’s residential real estate loans and consumer loans by origination year follows.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Residential:
Current	$	1,125,233		1,889,481		1,331,314		599,352		1,496,417		7,701,525		55,576		—	$	14,198,898
30-89 days past due		2,270		10,190		5,363		5,116		20,138		148,539		244		—		191,860
Accruing loans past due 90             days or more		—		97,784		28,810		40,613		248,186		626,480		—		—		1,041,873
Nonaccrual		508		19,705		12,889		3,571		5,003		343,638		194		—		385,508
Total residential	$	1,128,011		2,017,160		1,378,376		648,652		1,769,744		8,820,182		56,014		—	$	15,818,139
Residential - limited documentation:
Current	$	—		—		—		—		—		1,372,339		—		—	$	1,372,339
30-89 days past due		—		—		—		—		—		16,136		—		—		16,136
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		143,069		—		—		143,069
Total residential - limited    documentation	$	—		—		—		—		—		1,531,544		—		—	$	1,531,544
Consumer:
Home equity lines and loans:
Current	$	74		953		3,777		2,316		2,281		50,886		2,458,179		1,202,223	$	3,720,689
30-89 days past due		—		—		23		—		18		917		258		14,710		15,926
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		6,263		5,714		67,211		79,188
Total home equity lines and loans	$	74		953		3,800		2,316		2,299		58,066		2,464,151		1,284,144	$	3,815,803

4. Loans and leases and the allowance for credit losses, continued

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Recreational finance:
Current	$	678,012		2,637,664		1,631,536		841,575		588,596		850,845		—		—	$	7,228,228
30-89 days past due		459		5,467		5,584		4,372		4,709		6,230		—		—		26,821
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		147		2,217		4,494		4,741		4,697		10,922		—		—		27,218
Total recreational finance	$	678,618		2,645,348		1,641,614		850,688		598,002		867,997		—		—	$	7,282,267
Automobile:
Current	$	569,198		1,499,937		996,107		553,269		377,492		182,255		—		—	$	4,178,258
30-89 days past due		632		4,010		7,384		6,231		5,963		4,750		—		—		28,970
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		491		2,248		7,925		9,686		9,595		8,274		—		—		38,219
Total automobile	$	570,321		1,506,195		1,011,416		569,186		393,050		195,279		—		—	$	4,245,447
Other:
Current	$	42,958		145,146		121,021		45,113		27,818		30,171		905,388		1,708	$	1,319,323
30-89 days past due		1,224		455		630		256		114		533		4,823		257		8,292
Accruing loans past due 90             days or more		—		—		—		—		—		336		3,458		—		3,794
Nonaccrual		838		210		562		294		183		215		34,832		173		37,307
Total other	$	45,020		145,811		122,213		45,663		28,115		31,255		948,501		2,138	$	1,368,716
Total loans and leases at    March 31, 2021	$	6,690,394		18,077,950		15,326,970		9,890,946		7,438,037		24,310,850		16,236,649		1,327,284	$	99,299,080

4. Loans and leases and the allowance for credit losses, continued

The following table summarizes the loan grades applied at December 31, 2020 to the various classes of the Company’s commercial loans and commercial real estate loans by origination year.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Commercial, financial, leasing, etc.:
Loan grades:
Pass	$	7,732,728		2,277,233		1,505,486		930,834		719,796		1,387,695		11,352,416		21,286	$	25,927,474
Criticized accrual		388,326		84,358		113,940		41,587		39,930		73,401		584,751		13,970		1,340,263
Criticized nonaccrual		7,720		27,309		56,227		16,808		19,681		45,471		125,893		7,718		306,827
Total commercial,    financial, leasing, etc.	$	8,128,774		2,388,900		1,675,653		989,229		779,407		1,506,567		12,063,060		42,974	$	27,574,564
Real estate:
Commercial:
Loan grades:
Pass	$	3,353,450		4,681,834		3,299,095		2,628,061		2,746,165		5,698,834		875,348		—	$	23,282,787
Criticized accrual		526,037		400,154		579,507		290,885		568,144		1,212,672		44,260		—		3,621,659
Criticized nonaccrual		26,876		121,899		47,144		99,293		197,319		248,949		34,414		—		775,894
Total commercial real    estate	$	3,906,363		5,203,887		3,925,746		3,018,239		3,511,628		7,160,455		954,022		—	$	27,680,340
Residential builder and developer:
Loan grades:
Pass	$	506,295		223,880		109,453		15,048		10,976		11,320		236,943		—	$	1,113,915
Criticized accrual		3,690		106,847		14,836		3,421		—		1,885		4,050		—		134,729
Criticized nonaccrual		—		518		—		—		—		576		—		—		1,094
Total residential builder    and developer	$	509,985		331,245		124,289		18,469		10,976		13,781		240,993		—	$	1,249,738
Other commercial construction:
Loan grades:
Pass	$	1,050,258		2,998,921		2,048,063		945,339		233,127		294,030		74,611		—	$	7,644,349
Criticized accrual		37,192		148,492		381,091		225,949		144,665		12,034		—		—		949,423
Criticized nonaccrual		335		65,592		13,522		4,213		12,097		12,873		5,407		—		114,039
Total other commercial    construction	$	1,087,785		3,213,005		2,442,676		1,175,501		389,889		318,937		80,018		—	$	8,707,811

4. Loans and leases and the allowance for credit losses, continued

A summary of loans in accrual and nonaccrual status at December 31, 2020 for the various classes of the Company’s residential real estate loans and consumer loans by origination year follows.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Residential:
Current	$	2,722,862		1,416,259		618,736		1,318,094		718,235		6,898,756		71,894		—	$	13,764,836
30-89 days past due		13,496		7,781		7,258		13,477		7,947		150,447		—		—		200,406
Accruing loans past due 90             days or more		579		15,234		38,145		212,818		45,804		480,308		—		—		792,888
Nonaccrual		3,133		14,439		5,183		6,408		2,900		333,466		200		—		365,729
Total residential	$	2,740,070		1,453,713		669,322		1,550,797		774,886		7,862,977		72,094		—	$	15,123,859
Residential - limited documentation:
Current	$	—		—		—		—		—		1,462,277		—		—	$	1,462,277
30-89 days past due		—		—		—		—		—		19,687		—		—		19,687
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		147,170		—		—		147,170
Total residential - limited    documentation	$	—		—		—		—		—		1,629,134		—		—	$	1,629,134
Consumer:
Home equity lines and loans:
Current	$	773		3,983		1,591		2,016		162		51,554		2,569,621		1,252,185	$	3,881,885
30-89 days past due		—		—		—		—		—		1,148		939		22,242		24,329
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		6,148		5,752		67,492		79,392
Total home equity lines and loans	$	773		3,983		1,591		2,016		162		58,850		2,576,312		1,341,919	$	3,985,606

4. Loans and leases and the allowance for credit losses, continued

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Recreational finance:
Current	$	2,796,359		1,751,766		907,595		630,151		352,414		564,358		—		—	$	7,002,643
30-89 days past due		9,548		11,255		8,519		6,638		2,938		8,263		—		—		47,161
Accruing loans past                due 90 days or                more		—		—		—		—		—		—		—		—		—
Nonaccrual		1,854		3,883		4,072		4,194		2,733		8,783		—		—		25,519
Total recreational finance	$	2,807,761		1,766,904		920,186		640,983		358,085		581,404		—		—	$	7,075,323
Automobile:
Current	$	1,595,636		1,106,782		629,338		440,604		171,017		63,972		—		—	$	4,007,349
30-89 days past due		6,461		14,140		12,542		12,899		6,373		3,083		—		—		55,498
Accruing loans past                due 90 days or                more		—		—		—		—		—		—		—		—		—
Nonaccrual		1,615		7,144		10,788		10,061		5,991		3,805		—		—		39,404
Total automobile	$	1,603,712		1,128,066		652,668		463,564		183,381		70,860		—		—	$	4,102,251
Other:
Current	$	160,424		137,617		53,702		32,556		4,526		28,970		927,217		1,856	$	1,346,868
30-89 days past due		1,879		1,130		577		2,301		42		557		10,594		481		17,561
Accruing loans past                due 90 days or                more		—		—		—		—		—		374		4,207		—		4,581
Nonaccrual		1,493		492		339		183		31		501		35,044		148		38,231
Total other	$	163,796		139,239		54,618		35,040		4,599		30,402		977,062		2,485	$	1,407,241
Total loans and leases at    December 31, 2020	$	20,949,019		15,628,942		10,466,749		7,893,838		6,013,013		19,233,367		16,963,561		1,387,378	$	98,535,867

Allowance for credit losses

For purposes of determining the level of the allowance for credit losses, the Company evaluates its loan and lease portfolio by type.  Changes in the allowance for credit losses for the three months ended March 31, 2021 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(In thousands)
Beginning balance	$	405,846			670,719			103,590			556,232			—	$	1,736,387
Provision for credit losses		(72,418	)		99,471			(13,435	)		(38,618	)		—		(25,000	)
Net charge-offs
Charge-offs		(26,945	)		(60,652	)		(2,399	)		(32,929	)		—		(122,925	)
Recoveries		22,511			6,560			2,033			16,640			—		47,744
Net charge-offs		(4,434	)		(54,092	)		(366	)		(16,289	)		—		(75,181	)
Ending balance	$	328,994			716,098			89,789			501,325			—	$	1,636,206

4. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the three months ended March 31, 2020 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	366,094			322,201			56,033			229,118			77,625		$	1,051,071
Adoption of new accounting standard		(61,474	)		23,656			53,896			194,004			(77,625	)		132,457
Provision for credit losses		66,594			88,666			9,291			85,449			—			250,000
Net charge-offs
Charge-offs		(16,383	)		(1,272	)		(5,102	)		(44,947	)		—			(67,704	)
Recoveries		3,261			438			1,674			13,169			—			18,542
Net charge-offs		(13,122	)		(834	)		(3,428	)		(31,778	)		—			(49,162	)
Ending balance	$	358,092			433,689			115,792			476,793			—		$	1,384,366

Despite the allocation in the preceding tables, the allowance for credit losses is general in nature and is available to absorb losses from any loan or lease type.  In establishing the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and targeted credit review processes and also estimates losses for loans and leases with similar risk characteristics on a collective basis. The amounts of specific loss components in the Company’s loan and lease portfolios are determined through a loan-by-loan analysis of larger balance commercial loans and commercial real estate loans that are in nonaccrual status. Such loss estimates are typically based on expected future cash flows, collateral values and other factors that may impact the borrower’s ability to pay. To the extent that those loans are collateral-dependent, they are evaluated based on the fair value of the loan’s collateral as estimated at or near the financial statement date.  As the quality of a loan deteriorates to the point of classifying the loan as “criticized,” the process of obtaining updated collateral valuation information is usually initiated, unless it is not considered warranted given factors such as the relative size of the loan, the characteristics of the collateral or the age of the last valuation.  In those cases where current appraisals may not yet be available, prior appraisals are utilized with adjustments, as deemed necessary, for estimates of subsequent declines  in values  as determined by line of  business and/or loan  workout personnel. Those adjustments are reviewed and assessed for reasonableness by the Company’s credit department.  Accordingly, for real estate collateral securing larger nonaccrual commercial loans and commercial real estate loans, estimated collateral values are based on current appraisals and estimates of value.  For non-real estate loans, collateral is assigned a discounted estimated liquidation value and, depending on the nature of the collateral, is verified through field exams or other procedures.  In assessing collateral, real estate and non-real estate values are reduced by an estimate of selling costs.

For residential real estate loans, including home equity loans and lines of credit, the excess of the loan balance over the net realizable value of the property collateralizing the loan is charged-off when the loan becomes 150 days delinquent.  That charge-off is based on recent indications of value from external parties that are generally obtained shortly after a loan becomes nonaccrual.  Loans to consumers that file for bankruptcy are generally charged-off to estimated net collateral value shortly after the Company is notified of such filings.  When evaluating individual home equity loans and lines of credit for charge off and for purposes of estimating losses in determining the allowance for credit losses, the Company gives consideration to the required repayment of any first lien positions related to collateral property. Modified loans, including smaller balance homogenous loans, that are considered to be troubled debt restructurings are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.

4. Loans and leases and the allowance for credit losses, continued

Information with respect to loans and leases that were considered nonaccrual at the beginning and end of the reporting period and the interest income recognized on such loans for the three-month periods ended March 31, 2021 and 2020 follows.

	March 31, 2021						January 1, 2021		Three Months Ended March 31, 2021
	Amortized Cost with Allowance		Amortized Cost without Allowance		Total		Amortized Cost		Interest Income Recognized
	(In thousands)
Commercial, financial, leasing, etc.	$	211,894	$	83,175	$	295,069	$	306,827	$	3,085
Real estate:
Commercial		337,036		487,043		824,079		775,894		1,658
Residential builder and developer		1,224		—		1,224		1,094		33
Other commercial construction		24,186		102,039		126,225		114,039		41
Residential		186,374		199,134		385,508		365,729		4,498
Residential — limited documentation		84,342		58,727		143,069		147,170		79
Consumer:
Home equity lines and loans		44,548		34,640		79,188		79,392		952
Recreational finance		19,657		7,561		27,218		25,519		155
Automobile		33,270		4,949		38,219		39,404		49
Other		2,864		34,443		37,307		38,231		180
Total	$	945,395	$	1,011,711	$	1,957,106	$	1,893,299	$	10,730

	March 31, 2020						January 1, 2020		Three Months Ended March 31, 2020
	Amortized Cost with Allowance		Amortized Cost without Allowance		Total		Amortized Cost		Interest Income Recognized
	(In thousands)
Commercial, financial, leasing, etc.	$	153,924	$	132,723	$	286,647	$	346,743	$	1,738
Real estate:
Commercial		62,675		125,794		188,469		173,796		1,092
Residential builder and developer		3,204		—		3,204		4,708		48
Other commercial construction		12,039		22,896		34,935		35,881		861
Residential		67,221		226,417		293,638		322,504		6,819
Residential — limited documentation		26,444		92,873		119,317		114,667		201
Consumer:
Home equity lines and loans		26,230		36,841		63,071		65,039		1,459
Recreational finance		6,704		6,701		13,405		14,308		152
Automobile		9,802		9,449		19,251		21,293		47
Other		4,182		35,629		39,811		35,394		154
Total	$	372,425	$	689,323	$	1,061,748	$	1,134,333	$	12,571

4. Loans and leases and the allowance for credit losses, continued

In determining the allowance for credit losses, accruing loans with similar risk characteristics are generally evaluated collectively.  The Company utilizes statistically developed models to project principal balances over the remaining contractual lives of the loan portfolios and to determine estimated credit losses through a reasonable and supportable forecast period.  Individual loan credit quality indicators including loan grade and borrower repayment performance inform the models, which have been statistically developed based on historical correlations of credit losses with prevailing economic metrics, including unemployment, gross domestic product and real estate prices. Model forecasts may be adjusted for inherent limitations or biases that have been identified through independent validation and back-testing of model performance to actual realized results. At both March 31, 2021 and December 31, 2020, the Company utilized a reasonable and supportable forecast period of two years.  Subsequent to this forecast period the Company reverted, ratably over a one-year period, to historical loss experience to inform its estimate of losses for the remaining contractual life of each portfolio.  Changes in the amount of the allowance for credit losses reflect the outcome of the procedures described herein, including the impact of changes in macroeconomic forecasts as compared with previous forecasts, as well as the impact of portfolio concentrations, changes in underwriting practices, product expansions into new markets, imprecision in economic forecasts, geopolitical conditions and other risk factors that might influence the loss estimation process.

The Company’s reserve for off-balance sheet credit exposures was not material at March 31, 2021 and December 31, 2020.

Loan modifications

During the normal course of business, the Company modifies loans to maximize recovery efforts.  If the borrower is experiencing financial difficulty and a concession is granted, the Company considers such modifications as troubled debt restructurings and classifies those loans as either nonaccrual loans or renegotiated loans.  The types of concessions that the Company grants typically include principal deferrals and interest rate concessions, but may also include other types of concessions.

4. Loans and leases and the allowance for credit losses, continued

The table that follows summarizes the Company’s loan modification activities that were considered troubled debt restructurings for the three-month periods ended March 31, 2021 and 2020:  

					Post-modification (a)
	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
Three Months Ended March 31, 2021	(Dollars in thousands)
Commercial, financial, leasing, etc.		93	$	53,733	$	24,653	$	—	$	—	$	28,504	$	53,157
Real estate:
Commercial		33		26,870		11,160		—		2,214		12,422		25,796
Residential		123		39,583		38,557		—		—		1,117		39,674
Residential — limited documentation		10		1,116		1,059		—		—		—		1,059
Consumer:
Home equity lines and loans		26		1,715		1,486		—		—		174		1,660
Recreational finance		72		2,212		2,212		—		—		—		2,212
Automobile		276		4,969		4,955		—		—		14		4,969
Other		222		1,434		1,434		—		—		—		1,434
Total		855	$	131,632	$	85,516	$	—	$	2,214	$	42,231	$	129,961
Three Months Ended March 31, 2020
Commercial, financial, leasing, etc.		32	$	12,692	$	5,066	$	—	$	—	$	6,987	$	12,053
Real estate:
Commercial		10		39,642		1,355		—		—		35,968		37,323
Residential		27		10,178		3,247		—		—		8,977		12,224
Residential — limited documentation		9		2,980		2,667		—		—		1,232		3,899
Consumer:
Home equity lines and loans		6		738		412		—		—		334		746
Recreational finance		3		90		90		—		—		—		90
Automobile		9		182		182		—		—		—		182
Total		96	$	66,502	$	13,019	$	—	$	—	$	53,498	$	66,517

(a) Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.  The present value of interest rate concessions, discounted at the effective rate of the original loan, was not material.

Troubled debt restructurings are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.  Impairment of troubled debt restructurings that have subsequently defaulted may also be measured based on the loan’s observable market price or the fair value of collateral if the loan is collateral-dependent.  Charge-offs may also be recognized on troubled debt restructurings that have subsequently defaulted. Loans that were modified as troubled debt restructurings during the twelve months ended March 31, 2021 and 2020 and for which there was a subsequent payment default during the three-month periods ended March 31, 2021 and 2020, respectively, were not material.

The amount of foreclosed residential real estate property held by the Company was $24 million and $28 million at March 31, 2021 and December 31, 2020, respectively. There were $206 million and $214 million at March 31, 2021 and December 31, 2020, respectively, of loans secured by residential real estate that were in the process of foreclosure. Of all loans in the process of foreclosure at March 31, 2021, approximately 38% were government guaranteed.

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Borrowings

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Borrowings

5. Borrowings           

M&T had $529 million of fixed and variable rate junior subordinated deferrable interest debentures ("Junior Subordinated Debentures") outstanding at March 31, 2021 that are held by various trusts that were issued in connection with the issuance by those trusts of preferred capital securities ("Capital Securities") and common securities ("Common Securities").  The proceeds from the issuances of the Capital Securities and the Common Securities were used by the trusts to purchase the Junior Subordinated Debentures.  The Common Securities of each of those trusts are wholly owned by M&T and are the only class of each trust's securities possessing general voting powers.  The Capital Securities represent preferred undivided interests in the assets of the corresponding trust. Under the Federal Reserve Board’s risk-based capital guidelines, the securities are includable in M&T’s Tier 2 regulatory capital.

Holders of the Capital Securities receive preferential cumulative cash distributions unless M&T exercises its right to extend the payment of interest on the Junior Subordinated Debentures as allowed by the terms of each such debenture, in which case payment of distributions on the respective Capital Securities will be deferred for comparable periods. During an extended interest period, M&T may not pay dividends or distributions on, or repurchase, redeem or acquire any shares of its capital stock.  In general, the agreements governing the Capital Securities, in the aggregate, provide a full, irrevocable and unconditional guarantee by M&T of the payment of distributions on, the redemption of, and any liquidation distribution with respect to the Capital Securities. The obligations under such guarantee and the Capital Securities are subordinate and junior in right of payment to all senior indebtedness of M&T.

The Capital Securities will remain outstanding until the Junior Subordinated Debentures are repaid at maturity, are redeemed prior to maturity or are distributed in liquidation to the trusts. The Capital Securities are mandatorily redeemable in whole, but not in part, upon repayment at the stated maturity dates (ranging from 2027 to 2033) of the Junior Subordinated Debentures or the earlier redemption of the Junior Subordinated Debentures in whole upon the occurrence of one or more events set forth in the indentures relating to the Capital Securities, and in whole or in part at any time after an optional redemption prior to contractual maturity contemporaneously with the optional redemption of the related Junior Subordinated Debentures in whole or in part, subject to possible regulatory approval.

On January 25, 2021,  $350 million of variable rate senior notes of M&T Bank, the principal bank subsidiary of M&T, matured.  In addition, on March 1, 2021, M&T Bank redeemed $500 million of subordinated notes that were due to mature on December 1, 2021.

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Revenue from contracts with customers

3 Months Ended

Mar. 31, 2021

Revenue From Contract With Customer [Abstract]

Revenue from contracts with customers

6. Revenue from contracts with customers

A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, mortgage banking revenues, trading account and foreign exchange gains, investment securities gains, loan and letter of credit fees, income from bank-owned life insurance, and certain other revenues that are generally excluded from the scope of accounting guidance for revenue from contracts with customers.

For noninterest income revenue streams, the Company recognizes the expected amount of consideration as revenue when the performance obligations related to the services under the terms of a contract are satisfied. The Company’s contracts generally do not contain terms that necessitate significant judgment to determine the amount of revenue to recognize.

6. Revenue from contracts with customers, continued

The Company generally charges customer accounts or otherwise bills customers upon completion of its services.  Typically the Company’s contracts with customers have a duration of one year or less and payment for services is received at least annually, but oftentimes more frequently as services are provided.  At March 31, 2021 and December 31, 2020, the Company had $61 million and $67 million, respectively, of amounts receivable related to recognized revenue from the sources in the accompanying tables.  Such amounts are classified in accrued interest and other assets in the Company’s consolidated balance sheet.  In certain situations the Company is paid in advance of providing services and defers the recognition of revenue until its service obligation is satisfied.  At March 31, 2021 and December 31, 2020, the Company had deferred revenue of $41 million and $42 million, respectively, related to the sources in the accompanying tables recorded in accrued interest and other liabilities in the consolidated balance sheet.

The following tables summarize sources of the Company’s noninterest income during the three-month periods ended March 31, 2021 and 2020 that are subject to the noted accounting guidance.

	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
Three Months Ended March 31, 2021	(In thousands)
Classification in consolidated    statement of income
Service charges on deposit accounts	$	12,497		24,295		2,893		—		—		51,452		1,640	$	92,777
Trust income		—		—		—		—		—		—		156,022		156,022
Brokerage services income		—		—		—		—		—		—		13,113		13,113
Other revenues from operations:
Merchant discount and credit card fees		9,481		10,407		445		—		—		3,921		109		24,363
Other		—		958		1,091		384		1,722		5,807		12,948		22,910
	$	21,978		35,660		4,429		384		1,722		61,180		183,832	$	309,185
Three Months Ended March 31, 2020
Classification in consolidated    statement of income
Service charges on deposit accounts	$	15,250		24,157		2,812		—		—		61,670		2,272	$	106,161
Trust income		12		304		—		—		—		—		148,435		148,751
Brokerage services income		—		—		—		—		—		—		13,129		13,129
Other revenues from operations:
Merchant discount and credit card fees		10,331		13,316		849		—		—		2,271		400		27,167
Other		—		2,186		843		857		922		5,982		12,516		23,306
	$	25,593		39,963		4,504		857		922		69,923		176,752	$	318,514

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Pension plans and other postretirement benefits

3 Months Ended

Mar. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Pension plans and other postretirement benefits

7. Pension plans and other postretirement benefits

The Company provides defined benefit pension and other postretirement benefits (including health care and life insurance benefits) to qualified retired employees.  Net periodic defined benefit cost for defined benefit plans consisted of the following:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended March 31
	2021			2020			2021			2020
	(In thousands)
Service cost	$	5,023			4,714			248		223
Interest cost on projected benefit obligation		15,434			17,886			327			419
Expected return on plan assets		(35,950	)		(31,475	)		—			—
Amortization of prior service cost (credit)		125			125			(1,175	)		(1,175	)
Amortization of net actuarial loss (gain)		22,150			13,950			(300	)		(300	)
Net periodic cost (benefit)	$	6,782			5,200			(900	)		(833	)

Service cost is reflected in salaries and employee benefits expense in the consolidated statement of income. The other components of net periodic benefit cost are reflected in other costs of operations. Expenses incurred in connection with the Company's defined contribution pension and retirement savings plans totaled $33 million and $27 million for the three months ended March 31, 2021 and 2020, respectively, and are included in salaries and employee benefits expense.

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Earnings per common share

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Earnings per common share

8. Earnings per common share

The computations of basic earnings per common share follow:

	Three Months Ended March 31
	2021			2020
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	447,249		$	268,822
Less: Preferred stock dividends		(17,050	)		(17,078	)
Net income available to common equity		430,199			251,744
Less: Income attributable to unvested stock-based    compensation awards		(2,108	)		(1,043	)
Net income available to common shareholders	$	428,091		$	250,701
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation    awards		129,414			130,440
Less: Unvested stock-based compensation awards		(877	)		(744	)
Weighted-average shares outstanding		128,537			129,696
Basic earnings per common share	$	3.33		$	1.93

8. Earnings per common share, continued

The computations of diluted earnings per common share follow:

	Three Months Ended March 31
	2021			2020
	(In thousands, except per share)
Net income available to common equity	$	430,199		$	251,744
Less: Income attributable to unvested stock-based    compensation awards		(2,106	)		(1,043	)
Net income available to common shareholders	$	428,093		$	250,701
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation    awards		129,414			130,440
Less: Unvested stock-based compensation awards		(877	)		(744	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		132			59
Adjusted weighted-average shares outstanding		128,669			129,755
Diluted earnings per common share	$	3.33		$	1.93

GAAP defines unvested share-based awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) as participating securities that shall be included in the computation of earnings per common share pursuant to the two-class method.  The Company has issued stock-based compensation awards in the form of restricted stock and restricted stock units which, in accordance with GAAP, are considered participating securities.

Stock-based compensation awards to purchase common stock of M&T representing 462,342 and 464,694 common shares during the three-month periods ended March 31, 2021 and 2020, respectively, were not included in the computations of diluted earnings per common share because the effect on those periods would have been antidilutive.

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Comprehensive income

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Comprehensive income

9. Comprehensive income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income: 

	Investment			Defined Benefit						Total Amount				Income
	Securities			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2021	$	195,386			(650,087	)		369,558		$	(85,143	)			22,111		$	(63,032	)
Other comprehensive income before reclassifications:
Unrealized holding losses, net		(32,025	)		—			—			(32,025	)			8,907			(23,118	)
Foreign currency translation adjustment		—			—			684			684				(136	)		548
Unrealized losses on cash flow hedges		—			—			(9,498	)		(9,498	)			2,571			(6,927	)
Total other comprehensive income before    reclassifications		(32,025	)		—			(8,814	)		(40,839	)			11,342			(29,497	)
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on    held-to-maturity (“HTM”) securities		990			—			—			990		(a)		(276	)		714
Gains realized in net income		(3	)		—			—			(3	)	(b)		1			(2	)
Accretion of net gain on terminated cash flow hedges		—			—			(30	)		(30	)	(c)		9			(21	)
Net yield adjustment from cash flow hedges currently in effect		—			—			(82,044	)		(82,044	)	(a)		22,215			(59,829	)
Amortization of prior service credit		—			(1,050	)		—			(1,050	)	(d)		384			(666	)
Amortization of actuarial losses		—			21,850			—			21,850		(d)		(7,995	)		13,855
Total other comprehensive income (loss)		(31,038	)		20,800			(90,888	)		(101,126	)			25,680			(75,446	)
Balance — March 31, 2021	$	164,348			(629,287	)		278,670		$	(186,269	)			47,791		$	(138,478	)
Balance — January 1, 2020	$	50,701			(464,548	)		133,888		$	(279,959	)			73,279		$	(206,680	)
Other comprehensive income before reclassifications:
Unrealized holding gains, net		131,423			—			—			131,423				(34,544	)		96,879
Foreign currency translation adjustment		—			—			(3,225	)		(3,225	)			282			(2,943	)
Unrealized gains on cash flow hedges		—			—			456,333			456,333				(119,970	)		336,363
Total other comprehensive income before    reclassifications		131,423			—			453,108			584,531				(154,232	)		430,299
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on    HTM securities		772			—			—			772		(a)		(203	)		569
Accretion of net gain on terminated cash flow hedges		—			—			(34	)		(34	)	(c)		9			(25	)
Net yield adjustment from cash flow hedges currently in effect		—			—			(32,041	)		(32,041	)	(a)		8,423			(23,618	)
Amortization of prior service credit		—			(1,050	)		—			(1,050	)	(d)		276			(774	)
Amortization of actuarial losses		—			13,650			—			13,650		(d)		(3,588	)		10,062
Total other comprehensive income		132,195			12,600			421,033			565,828				(149,315	)		416,513
Balance — March 31, 2020	$	182,896			(451,948	)		554,921		$	285,869				(76,036	)	$	209,833

(a) Included in interest income.

(b) Included in gain (loss) on bank investment securities.

(c) Included in interest expense.

(d) Included in other costs of operations.

9. Comprehensive income, continued

Accumulated other comprehensive income (loss), net consisted of the following:

				Defined
	Investment			Benefit
	Securities			Plans			Other			Total
	(In thousands)
Balance — December 31, 2020	$	144,602		$	(481,064	)	$	273,430		$	(63,032	)
Net gain (loss) during period		(22,406	)		13,189			(66,229	)		(75,446	)
Balance — March 31, 2021	$	122,196		$	(467,875	)	$	207,201		$	(138,478	)

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Derivative financial instruments

3 Months Ended

Mar. 31, 2021

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative financial instruments

10. Derivative financial instruments

As part of managing interest rate risk, the Company enters into interest rate swap agreements to modify the repricing characteristics of certain portions of the Company’s portfolios of earning assets and interest-bearing liabilities.  The Company designates interest rate swap agreements utilized in the management of interest rate risk as either fair value hedges or cash flow hedges.  Interest rate swap agreements are generally entered into with counterparties that meet established credit standards and most contain master netting, collateral and/or settlement provisions protecting the at-risk party. Based on adherence to the Company’s credit standards and the presence of the netting, collateral or settlement provisions, the Company believes that the credit risk inherent in these contracts was not material as of March 31, 2021.

The net effect of interest rate swap agreements was to increase net interest income by $91 million and $36 million during the three-month periods ended March 31, 2021 and 2020, respectively.

Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:

					Weighted-						Estimated
	Notional		Average		Average Rate						Fair Value
	Amount		Maturity		Fixed			Variable			Gain (Loss) (a)
	(In thousands)		(In years)								(In thousands)
March 31, 2021
Fair value hedges:
Fixed rate long-term borrowings (b)	$	1,650,000		3.1		2.86	%		0.75	%	$	(1,117	)
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(c)		36,050,000		0.9		1.80	%		0.11	%		(2,077	)
Total	$	37,700,000		1.0							$	(3,194	)
December 31, 2020
Fair value hedges:
Fixed rate long-term borrowings (b)	$	1,650,000		3.3		2.86	%		0.79	%	$	651
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(d)		49,400,000		0.9		2.22	%		0.15	%		425
Total	$	51,050,000		1.0							$	1,076

(a) Certain clearinghouse exchanges consider payments by counterparties for variation margin on derivative instruments to be settlements of those positions. The impact of such treatment at March 31, 2021 and December 31, 2020 was a reduction of the estimated fair value gains on interest rate swap agreements designated as fair value hedges of $70.6 million and $101.5 million, respectively, and on interest rate swap agreements designated as cash flow hedges of $283.1 million and $372.2 million, respectively.

(b) Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

(c) Includes notional amount and terms of $18.7 billion of forward-starting interest rate swap agreements that become effective in 2021 - 2022.

(d) Includes notional amount and terms of $32.1 billion of forward-starting interest rate swap agreements that become effective in  2021 - 2022.

10. Derivative financial instruments, continued

The Company utilizes commitments to sell residential and commercial real estate loans to hedge the exposure to changes in the fair value of real estate loans held for sale.  Such commitments have generally been designated as fair value hedges. The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in fair value of certain commitments to originate real estate loans for sale.

Derivative financial instruments used for trading account purposes included interest rate contracts, foreign exchange and other option contracts, foreign exchange forward and spot contracts, and financial futures. Interest rate contracts entered into for trading account purposes had notional values of $36.2 billion and $37.8 billion at March 31, 2021 and December 31, 2020, respectively.  The notional amounts of foreign currency and other option and futures contracts entered into for trading account purposes aggregated $910 million and $776 million at March 31, 2021 and December 31, 2020, respectively.

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:

	Asset Derivatives				Liability Derivatives
	Fair Value				Fair Value
	March 31,		December 31,		March 31,		December 31,
	2021		2020		2021		2020
	(In thousands)
Derivatives designated and qualifying as hedging instruments
Interest rate swap agreements (a)	$	172	$	1,968	$	3,366	$	892
Commitments to sell real estate loans (a)		6,270		1,488		146		8,458
		6,442		3,456		3,512		9,350
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans     for sale (a)		22,921		43,599		9,164		365
Commitments to sell real estate loans (a)		36,179		2,409		5,605		13,868
Trading:
Interest rate contracts (b)		629,458		1,008,913		84,567		105,768
Foreign exchange and other option and futures contracts (b)		8,786		9,608		10,672		11,134
		697,344		1,064,529		110,008		131,135
Total derivatives	$	703,786	$	1,067,985	$	113,520	$	140,485

(a) Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b) Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.  The impact of variation margin payments at March 31, 2021 and December 31, 2020 was a reduction of the estimated fair value of interest rate contracts in the trading account in an asset position of $54.6 million and $5.6 million, respectively, and in a liability position of $502.0 million and $806.5 million, respectively.

	Amount of Gain (Loss) Recognized
	Three Months Ended March 31, 2021					Three Months Ended March 31, 2020
	Derivative			Hedged Item		Derivative		Hedged Item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(32,658	)		31,898	$	88,710		(87,824	)
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(3,234	)			$	12,786
Foreign exchange and other option and futures contracts (b)		1,608					4,352
Total	$	(1,626	)			$	17,138

(a) Reported as an adjustment to interest expense.

(b) Reported as trading account and foreign exchange gains.  

10. Derivative financial instruments, continued

	Carrying Amount of the Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount of the Hedged Item
	March 31, 2021		December 31, 2020		March 31, 2021		December 31, 2020
	(In thousands)
Location in the Consolidated Balance Sheet    of the Hedged Items in Fair Value Hedges
Long-term debt	$	1,718,238	$	1,750,048	$	69,428	$	101,326

The amount of interest income recognized in the consolidated statement of income associated with derivatives designated as cash flow hedges was $82 million and $32 million for the three months ended March 31, 2021 and 2020, respectively. As of March 31, 2021 the unrealized gain recognized in other comprehensive income related to cash flow hedges was $281 million, of which $74 million, $165 million and $42 million related to interest rate swap agreements maturing in 2021, 2022, and 2023, respectively.

The Company also has commitments to sell and commitments to originate residential and commercial real estate loans that are considered derivatives.  The Company designates certain of the commitments to sell real estate loans as fair value hedges of real estate loans held for sale.  The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in the fair value of certain commitments to originate real estate loans for sale.  As a result of these activities, net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans were approximately $55 million and $64 million at March 31, 2021 and December 31, 2020, respectively.  Changes in unrealized gains and losses are included in mortgage banking revenues and, in general, are realized in subsequent periods as the related loans are sold and commitments satisfied.

The Company does not offset derivative asset and liability positions in its consolidated financial statements.  The Company’s exposure to credit risk by entering into derivative contracts is mitigated through master netting agreements and collateral posting or settlement requirements.  Master netting agreements covering interest rate and foreign exchange contracts with the same party include a right to set-off that becomes enforceable in the event of default, early termination or under other specific conditions.

The aggregate fair value of derivative financial instruments in a liability position and the net liability positions with counterparties which are subject to master netting arrangements was $50 million and $114 million at March 31, 2021 and December 31, 2020, respectively.  The Company was required to post collateral relating to those positions of $50 million and $103 million at March 31, 2021 and December 31, 2020, respectively.   Certain of the Company’s derivative financial instruments contain provisions that require the Company to maintain specific credit ratings from credit rating agencies to avoid higher collateral posting requirements.  If the Company’s debt rating were to fall below specified ratings, the counterparties of the derivative financial instruments could demand immediate incremental collateralization on those instruments in a net liability position.  The aggregate fair value of all derivative financial instruments with such credit risk-related contingent features in a net liability position on March 31, 2021 was not material.

The aggregate fair value of derivative financial instruments in an asset position and the net asset positions with counterparties which are subject to enforceable master netting arrangements was $4 million at March 31, 2021 and $3 million at December 31, 2020.  Counterparties posted collateral relating to those positions of $3 million at each of March 31, 2021 and December 31, 2020. Trading account interest rate swap agreements entered into with customers are subject to the Company’s credit risk standards and often contain collateral provisions.

10. Derivative financial instruments, continued

In addition to the derivative contracts noted above, the Company clears certain derivative transactions through a clearinghouse, rather than directly with counterparties. Those transactions cleared through a clearinghouse require initial margin collateral and variation margin payments depending on the contracts being in a net asset or liability position. The amount of initial margin collateral posted by the Company was $150 million and $135 million at March 31, 2021 and December 31, 2020, respectively. The fair value asset and liability amounts of derivative contracts have been reduced by variation margin payments treated as settlements as described herein.  Variation margin on derivative contracts not treated as settlements continues to represent collateral posted or received by the Company.

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Variable interest entities and asset securitizations

3 Months Ended

Mar. 31, 2021

Text Block [Abstract]

Variable interest entities and asset securitizations

11. Variable interest entities and asset securitizations

The Company’s securitization activity has consisted of securitizing loans originated for sale into government issued or guaranteed mortgage-backed securities. The Company has not recognized any losses as a result of having securitized assets.

As described in note 5, M&T has issued junior subordinated debentures payable to various trusts that have issued Capital Securities. M&T owns the common securities of those trust entities. The Company is not considered to be the primary beneficiary of those entities and, accordingly, the trusts are not included in the Company’s consolidated financial statements. At each of March 31, 2021 and December 31, 2020, the Company included the junior subordinated debentures as “long-term borrowings” in its consolidated balance sheet and recognized $23 million in other assets for its “investment” in the common securities of the trusts that will be concomitantly repaid to M&T by the respective trust from the proceeds of M&T’s repayment of the junior subordinated debentures associated with preferred capital securities described in note 5.

The Company has invested as a limited partner in various partnerships that collectively had total assets of approximately $2.3 billion at each of March 31, 2021 and December 31, 2020. Those partnerships generally construct or acquire properties for which the investing partners are eligible to receive certain federal income tax credits in accordance with government guidelines. Such investments may also provide tax deductible losses to the partners. The partnership investments also assist the Company in achieving its community reinvestment initiatives. As a limited partner, there is no recourse to the Company by creditors of the partnerships. However, the tax credits that result from the Company’s investments in such partnerships are generally subject to recapture should a partnership fail to comply with the respective government regulations. The Company’s carrying amount of its investments in such partnerships was $853 million, including $361 million of unfunded commitments, at March 31, 2021 and $861 million, including $406 million of unfunded commitments, at December 31, 2020.  Contingent commitments to provide additional capital contributions to these partnerships were not material at March 31, 2021. The Company has not provided financial or other support to the partnerships that was not contractually required. The Company’s maximum exposure to loss from its investments in such partnerships as of March 31, 2021 was $1.1 billion, including possible recapture of certain tax credits.  Management currently estimates that no material losses are probable as a result of the Company’s involvement with such entities.  The Company, in its position as limited partner, does not direct the activities that most significantly impact the economic performance of the partnerships and, therefore, in accordance with the accounting provisions for variable interest entities, the partnership entities are not included in the Company’s consolidated financial statements.  The Company’s investment in qualified affordable housing projects is amortized to income taxes in the consolidated statement of income as tax credits and other tax benefits resulting from deductible losses associated with the projects are received. The Company amortized $19 million and $21 million of its investments in qualified affordable housing projects to income tax expense during the three-month periods ended March 31, 2021 and 2020, respectively, and recognized $21 million and $26 million of tax credits and other tax benefits during those respective periods.

The Company serves as investment advisor for certain registered money-market funds.  The Company has no explicit arrangement to provide support to those funds, but may waive portions of its allowable management fees as a result of market conditions.

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Fair value measurements

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Fair value measurements

12. Fair value measurements

GAAP permits an entity to choose to measure eligible financial instruments and other items at fair value.  The Company has not made any fair value elections at March 31, 2021.

Pursuant to GAAP, 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. A three-level hierarchy exists in GAAP for fair value measurements based upon the inputs to the valuation of an asset or liability.

• Level 1 — Valuation is based on quoted prices in active markets for identical assets and liabilities.

• Level 2 — Valuation is determined from quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar instruments in markets that are not active or by model-based techniques in which all significant inputs are observable in the market.

• Level 3 — Valuation is derived from model-based and other techniques in which at least one significant input is unobservable and which may be based on the Company's own estimates about the assumptions that market participants would use to value the asset or liability.

When available, the Company attempts to use quoted market prices in active markets to determine fair value and classifies such items as Level 1 or Level 2. If quoted market prices in active markets are not available, fair value is often determined using model-based techniques incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using model-based techniques are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. The following is a description of the valuation methodologies used for the Company's assets and liabilities that are measured on a recurring basis at estimated fair value.

Trading account assets and liabilities

Trading account assets and liabilities consist primarily of interest rate contracts and foreign exchange contracts with customers who require such services with offsetting positions with third parties to minimize the Company's risk with respect to such transactions. The Company generally determines the fair value of its derivative trading account assets and liabilities using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2.  Mutual funds held in connection with deferred compensation and other arrangements have been classified as Level 1 valuations. Valuations of investments in municipal and other bonds can generally be obtained through reference to quoted prices in less active markets for the same or similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2.

Investment securities available for sale and equity securities

The majority of the Company's available-for-sale investment securities have been valued by reference to prices for similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2. Certain investments in mutual funds and equity securities are actively traded and, therefore, have been classified as Level 1 valuations.

Real estate loans held for sale

The Company utilizes commitments to sell real estate loans to hedge the exposure to changes in fair value of real estate loans held for sale. The carrying value of hedged real estate loans held for sale includes changes in estimated fair value during the hedge period.  Typically, the Company attempts to hedge real estate loans held for sale from the date of close through the sale date.  The fair value of hedged real estate loans held for sale is generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans with similar characteristics and, accordingly, such loans have been classified as a Level 2 valuation.

12. Fair value measurements, continued

Commitments to originate real estate loans for sale and commitments to sell real estate loans

The Company enters into various commitments to originate real estate loans for sale and commitments to sell real estate loans. Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value on the consolidated balance sheet. The estimated fair values of such commitments were generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans to certain government-sponsored entities and other parties. The fair valuations of commitments to sell real estate loans generally result in a Level 2 classification. The estimated fair value of commitments to originate real estate loans for sale are adjusted to reflect the Company's anticipated commitment expirations. The estimated commitment expirations are considered significant unobservable inputs contributing to the Level 3 classification of commitments to originate real estate loans for sale.  Significant unobservable inputs used in the determination of estimated fair value of commitments to originate real estate loans for sale are included in the accompanying table of significant unobservable inputs to Level 3 measurements.

Interest rate swap agreements used for interest rate risk management

The Company utilizes interest rate swap agreements as part of the management of interest rate risk to modify the repricing characteristics of certain portions of its portfolios of earning assets and interest-bearing liabilities. The Company generally determines the fair value of its interest rate swap agreements using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2. The Company has considered counterparty credit risk in the valuation of its interest rate swap agreement assets and has considered its own credit risk in the valuation of its interest rate swap agreement liabilities.

12. Fair value measurements, continued

The following tables present assets and liabilities at March 31, 2021 and December 31, 2020 measured at estimated fair value on a recurring basis:

	Fair Value Measurements		Level 1		Level 2		Level 3
	(In thousands)
March 31, 2021
Trading account assets	$	687,359	$	49,115	$	638,244	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		7,013		—		7,013		—
Mortgage-backed securities:
Government issued or guaranteed		4,225,089		—		4,225,089		—
Privately issued		16		—		—		16
Other debt securities		132,319		—		132,319		—
		4,364,437		—		4,364,421		16
Equity securities		81,792		64,150		17,642		—
Real estate loans held for sale		871,026		—		871,026		—
Other assets (a)		65,542		—		42,621		22,921
Total assets	$	6,070,156	$	113,265	$	5,933,954	$	22,937
Trading account liabilities	$	95,239	$	—	$	95,239	$	—
Other liabilities (a)		18,281		—		9,117		9,164
Total liabilities	$	113,520	$	—	$	104,356	$	9,164
December 31, 2020
Trading account assets	$	1,068,581	$	50,060	$	1,018,521	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		9,338		—		9,338		—
Mortgage-backed securities:
Government issued or guaranteed		4,683,438		—		4,683,438		—
Privately issued		16		—		—		16
Other debt securities		129,814		—		129,814		—
		4,822,606		—		4,822,590		16
Equity securities		92,985		63,129		29,856		—
Real estate loans held for sale		1,054,676		—		1,054,676		—
Other assets (a)		49,464		—		5,865		43,599
Total assets	$	7,088,312	$	113,189	$	6,931,508	$	43,615
Trading account liabilities	$	116,902	$	—	$	116,902	$	—
Other liabilities (a)		23,583		—		23,218		365
Total liabilities	$	140,485	$	—	$	140,120	$	365

 (a) Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

12. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended March 31, 2021 and 2020 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities		Other Assets and Other Liabilities
2021	(In thousands)
Balance — January 1, 2021	$	16		43,234
Total gains realized/unrealized:
Included in earnings		—		6,025		(a)
Transfers out of Level 3		—		(35,502	)	(b)
Balance — March 31, 2021	$	16		13,757
Changes in unrealized gains included in earnings    related to assets still held at March 31, 2021	$	—		5,300		(a)

2020
Balance — January 1, 2020	$	16	10,740
Total gains realized/unrealized:
Included in earnings		—	44,081		(a)
Transfers out of Level 3		—	(19,794	)	(b)
Balance — March 31, 2020	$	16	35,027
Changes in unrealized gains included in earnings    related to assets still held at March 31, 2020	$	—	32,584		(a)

(a) Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(b) Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

  The Company is required, on a nonrecurring basis, to adjust the carrying value of certain assets or provide valuation allowances related to certain assets using fair value measurements.  The more significant of those assets follow.

Loans

Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectable portions of those loans. Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and the related nonrecurring fair value measurement adjustments have been classified as Level 2, unless significant adjustments have been made to the valuation that are not readily observable by market participants. Non-real estate collateral supporting commercial loans generally consists of business assets such as receivables, inventory and equipment.  Fair value estimations are typically determined by discounting recorded values of those assets to reflect estimated net realizable value considering specific borrower facts and circumstances and the experience of credit personnel in their dealings with similar borrower collateral liquidations.  Such discounts were in the range of 15% to 90% with a weighted-average of 54%

12. Fair value measurements, continued

at March 31, 2021.  As these discounts are not readily observable and are considered significant, the valuations have been classified as Level 3.  Automobile collateral is typically valued by reference to independent pricing sources based on recent sales transactions of similar vehicles and, accordingly, the related nonrecurring fair value measurement adjustments have been classified as Level 2.  Collateral values for other consumer installment loans are generally estimated based on historical recovery rates for similar types of loans which at March 31, 2020 was 45%.  As these recovery rates are not readily observable by market participants, such valuation adjustments have been classified as Level 3.  Loans subject to nonrecurring fair value measurement were $658 million at March 31, 2021 ($357 million and $301 million of which were classified as Level 2 and Level 3, respectively), $652 million at December 31, 2020 ($339 million and $313 million of which were classified as Level 2 and Level 3, respectively) and $196 million at March 31, 2020 ($116 million and $80 million of which were classified as Level 2 and Level 3, respectively).  Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on March 31, 2021 and 2020 were decreases of $66 million and $21 million for the three-month periods ended March 31, 2021 and 2020, respectively.

Assets taken in foreclosure of defaulted loans

Assets taken in foreclosure of defaulted loans are primarily comprised of commercial and residential real property and are generally measured at the lower of cost or fair value less costs to sell.  The fair value of the real property is generally determined using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and, accordingly, the related nonrecurring fair value measurement adjustments have generally been classified as Level 2.  Assets taken in foreclosure of defaulted loans subject to nonrecurring fair value measurement were $9 million and $14 million at March 31, 2021 and 2020, respectively.  Changes in fair value recognized for those foreclosed assets held by the Company were not material during the three-month periods ended March 31, 2021 and 2020.

Capitalized servicing rights

Capitalized servicing rights are initially measured at fair value in the Company’s consolidated balance sheet. The Company utilizes the amortization method to subsequently measure its capitalized servicing assets. In accordance with GAAP, the Company must record impairment charges, on a nonrecurring basis, when the carrying value of certain strata exceed their estimated fair value. To estimate the fair value of servicing rights, the Company considers market prices for similar assets, if available, and the present value of expected future cash flows associated with the servicing rights calculated using assumptions that market participants would use in estimating future servicing income and expense. Such assumptions include estimates of the cost of servicing loans, loan default rates, an appropriate discount rate, and prepayment speeds. For purposes of evaluating and measuring impairment of capitalized servicing rights, the Company stratifies such assets based on the predominant risk characteristics of the underlying financial instruments that are expected to have the most impact on projected prepayments, cost of servicing and other factors affecting future cash flows associated with the servicing rights. Such factors may include financial asset or loan type, note rate and term. The amount of impairment recognized is the amount by which the carrying value of the capitalized servicing rights for a stratum exceed estimated fair value. Impairment is recognized through a valuation allowance. The determination of fair value of capitalized servicing rights is considered a Level 3 valuation. Capitalized servicing rights related to residential mortgage loans of $156 million and $159 million at March 31, 2021 and December 31, 2020, respectively, required a valuation allowance of $21 million and $30 million, respectively. Significant unobservable inputs used in this Level 3 valuation included weighted-average prepayment speeds of 15.22% and 16.01% at March 31, 2021 and December 31, 2020, respectively, and a weighted-average option-adjusted spread of 900 basis points at each date. There was a recovery of previously recognized impairment charges for capitalized servicing rights of $9 million during the three months ended March 31, 2021 and an impairment charge of $10 million during the three months ended March 31, 2020.  

12. Fair value measurements, continued

Significant unobservable inputs to Level 3 measurements

The following tables present quantitative information about significant unobservable inputs used in the fair value measurements for certain Level 3 assets and liabilities at March 31, 2021 and December 31, 2020:

	Fair Value		Valuation Technique	Unobservable Inputs/Assumptions		Range (Weighted- Average)
	(In thousands)
March 31, 2021
Recurring fair value measurements
Privately issued mortgage-    backed securities	$	16	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		13,757	Discounted cash flow	Commitment expirations		0% - 98% (18%)
December 31, 2020
Recurring fair value measurements
Privately issued mortgage-    backed securities	$	16	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		43,234	Discounted cash flow	Commitment expirations		0% - 98% (16%)

(a) Other Level 3 assets (liabilities) consist of commitments to originate real estate loans.

Sensitivity of fair value measurements to changes in unobservable inputs

An increase (decrease) in the estimate of expirations for commitments to originate real estate loans would generally result in a lower (higher) fair value measurement. Estimated commitment expirations are derived considering loan type, changes in interest rates and remaining length of time until closing.

12. Fair value measurements, continued

Disclosures of fair value of financial instruments

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:

	March 31, 2021
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
	(In thousands)
Financial assets:
Cash and cash equivalents	$	1,258,989			1,258,989			1,213,877		45,112			—
Interest-bearing deposits at banks		31,407,227			31,407,227			—		31,407,227			—
Federal funds sold		1,000			1,000			—		1,000			—
Trading account assets		687,359			687,359			49,115		638,244			—
Investment securities		6,610,667			6,682,742			64,150		6,551,036			67,556
Loans and leases:
Commercial loans and leases		27,811,190			27,509,182			—		—			27,509,182
Commercial real estate loans		37,425,974			36,661,758			—		98,513			36,563,245
Residential real estate loans		17,349,683			17,501,398			—		4,015,464			13,485,934
Consumer loans		16,712,233			16,781,406			—		—			16,781,406
Allowance for credit losses		(1,636,206	)		—			—		—			—
Loans and leases, net		97,662,874			98,453,744			—		4,113,977			94,339,767
Accrued interest receivable		440,658			440,658			—		440,658			—
Financial liabilities:
Noninterest-bearing deposits	$	(53,641,419	)		(53,641,419	)		—		(53,641,419	)		—
Savings and interest-checking deposits		(70,679,036	)		(70,679,036	)		—		(70,679,036	)		—
Time deposits		(3,514,219	)		(3,526,947	)		—		(3,526,947	)		—
Deposits at Cayman Islands office		(641,691	)		(641,691	)		—		(641,691	)		—
Short-term borrowings		(58,957	)		(58,957	)		—		(58,957	)		—
Long-term borrowings		(3,498,503	)		(3,609,625	)		—		(3,609,625	)		—
Accrued interest payable		(43,745	)		(43,745	)		—		(43,745	)		—
Trading account liabilities		(95,239	)		(95,239	)		—		(95,239	)		—
Other financial instruments:
Commitments to originate real estate    loans for sale	$	13,757			13,757			—		—			13,757
Commitments to sell real estate loans		36,698			36,698			—		36,698			—
Other credit-related commitments		(134,928	)		(134,928	)		—		—			(134,928	)
Interest rate swap agreements used for    interest rate risk management		(3,194	)		(3,194	)		—		(3,194	)		—

12. Fair value measurements, continued

	December 31, 2020
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
				(In thousands)
Financial assets:
Cash and cash equivalents	$	1,552,743			1,552,743			1,497,457		55,286			—
Interest-bearing deposits at banks		23,663,810			23,663,810			—		23,663,810			—
Trading account assets		1,068,581			1,068,581			50,060		1,018,521			—
Investment securities		7,045,697			7,138,989			63,129		7,005,571			70,289
Loans and leases:
Commercial loans and leases		27,574,564			27,220,699			—		—			27,220,699
Commercial real estate loans		37,637,889			36,816,580			—		277,911			36,538,669
Residential real estate loans		16,752,993			17,089,141			—		4,135,655			12,953,486
Consumer loans		16,570,421			16,554,050			—		—			16,554,050
Allowance for credit losses		(1,736,387	)		—			—		—			—
Loans and leases, net		96,799,480			97,680,470			—		4,413,566			93,266,904
Accrued interest receivable		419,936			419,936			—		419,936			—
Financial liabilities:
Noninterest-bearing deposits	$	(47,572,884	)		(47,572,884	)		—		(47,572,884	)		—
Savings and interest-checking deposits		(67,680,840	)		(67,680,840	)		—		(67,680,840	)		—
Time deposits		(3,899,910	)		(3,919,367	)		—		(3,919,367	)		—
Deposits at Cayman Islands office		(652,104	)		(652,104	)		—		(652,104	)		—
Short-term borrowings		(59,482	)		(59,482	)		—		(59,482	)		—
Long-term borrowings		(4,382,193	)		(4,490,433	)		—		(4,490,433	)		—
Accrued interest payable		(59,916	)		(59,916	)		—		(59,916	)		—
Trading account liabilities		(116,902	)		(116,902	)		—		(116,902	)		—
Other financial instruments:
Commitments to originate real estate    loans for sale	$	43,234			43,234			—		—			43,234
Commitments to sell real estate loans		(18,429	)		(18,429	)		—		(18,429	)		—
Other credit-related commitments		(133,354	)		(133,354	)		—		—			(133,354	)
Interest rate swap agreements used    for interest rate risk management		1,076			1,076			—		1,076			—

With the exception of marketable securities, certain off-balance sheet financial instruments and mortgage loans originated for sale, the Company’s financial instruments are not readily marketable and market prices do not exist. The Company, in attempting to comply with the provisions of GAAP that require disclosures of fair value of financial instruments, has not attempted to market its financial instruments to potential buyers, if any exist. Since negotiated prices in illiquid markets depend greatly upon the then present motivations of the buyer and seller, it is reasonable to assume that actual sales prices could vary widely from any estimate of fair value made without the benefit of negotiations. Additionally, changes in market interest rates can dramatically impact the value of financial instruments in a short period of time.

The Company does not believe that the estimated information presented herein is representative of the earnings power or value of the Company. The preceding analysis, which is inherently limited in depicting fair value, also does not consider any value associated with existing customer relationships nor the ability of the Company to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

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Commitments and contingencies

3 Months Ended

Mar. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments and contingencies

13. Commitments and contingencies

In the normal course of business, various commitments and contingent liabilities are outstanding.  The following table presents the Company's significant commitments.  Certain of these commitments are not included in the Company's consolidated balance sheet.

	March 31,		December 31,
	2021		2020
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,626,965	$	5,563,854
Commercial real estate loans to be sold		249,514		363,735
Other commercial real estate		6,426,199		7,237,367
Residential real estate loans to be sold		1,081,889		1,026,118
Other residential real estate		600,212		665,259
Commercial and other		20,140,102		19,427,886
Standby letters of credit		2,231,893		2,241,417
Commercial letters of credit		13,260		27,332
Financial guarantees and indemnification contracts		4,365,308		4,220,531
Commitments to sell real estate loans		1,881,140		2,108,823

Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  In addition to the amounts in the preceding table, the Company had discretionary funding commitments to commercial customers of $10.5 billion and $10.4 billion at March 31, 2021 and December 31, 2020, respectively, that the Company had the unconditional right to cancel prior to funding. Standby and commercial letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party.   Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party, whereas commercial letters of credit are issued to facilitate commerce and typically result in the commitment being funded when the underlying transaction is consummated between the customer and a third party.  The credit risk associated with commitments to extend credit and standby and commercial letters of credit is essentially the same as that involved with extending loans to customers and is subject to normal credit policies.  Collateral may be obtained based on management's assessment of the customer's creditworthiness.

Financial guarantees and indemnification contracts are oftentimes similar to standby letters of credit and include mandatory purchase agreements issued to ensure that customer obligations are fulfilled, recourse obligations associated with sold loans, and other guarantees of customer performance or compliance with designated rules and regulations.  Included in financial guarantees and indemnification contracts are loan principal amounts sold with recourse in conjunction with the Company's involvement in the Fannie Mae Delegated Underwriting and Servicing program.  The Company's maximum credit risk for recourse associated with loans sold under this program totaled approximately $4.0 billion at each of March 31, 2021 and December 31, 2020.

Since many loan commitments, standby letters of credit, and guarantees and indemnification contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.

The Company utilizes commitments to sell real estate loans to hedge exposure to changes in the fair value of real estate loans held for sale.  Such commitments are considered derivatives and along with commitments to originate real estate loans to be held for sale are generally recorded in the consolidated balance sheet at estimated fair market value.

The Company is contractually obligated to repurchase previously sold residential real estate loans that do not ultimately meet investor sale criteria related to underwriting procedures or loan documentation.  When required to do so, the Company may reimburse loan purchasers for losses incurred or may repurchase certain loans.  The Company reduces residential mortgage banking revenues by an estimate for losses related to its obligations to loan purchasers.  

13. Commitments and contingencies, continued

The amount of those charges is based on the volume of loans sold, the level of reimbursement requests received from loan purchasers and estimates of losses that may be associated with previously sold loans. At March 31, 2021, the Company believes that its obligation to loan purchasers was not material to the Company’s consolidated financial position.

M&T and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings and matters in which claims for monetary damages are asserted.  On an on-going basis management, after consultation with legal counsel, assesses the Company’s liabilities and contingencies in connection with such proceedings.  For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent pending or threatened litigation could result in exposure in excess of the recorded liability, the amount of such excess is not currently estimable.  Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was estimated to be between $0 and $25 million as of March 31, 2021.  Although the Company does not believe that the outcome of pending legal matters will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

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Segment information

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Segment information

14. Segment information

Reportable segments have been determined based upon the Company's internal profitability reporting system, which is organized by strategic business unit.  Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer and the distribution of those products and services are similar.  The reportable segments are Business Banking, Commercial Banking, Commercial Real Estate, Discretionary Portfolio, Residential Mortgage Banking and Retail Banking.

The financial information of the Company's segments was compiled utilizing the accounting policies described in note 22 of Notes to Financial Statements in the 2020 Annual Report.  The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP.  As a result, the financial information of the reported segments is not necessarily comparable with similar information reported by other financial institutions.  Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in reported segment financial data.  

14. Segment information, continued

Information about the Company's segments is presented in the following table:

	Three Months Ended March 31
	2021								2020
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)			Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	155,903		669			46,271		$	137,833		885			32,926
Commercial Banking		285,912		809			122,638			291,776		1,053			143,732
Commercial Real Estate		200,843		222			71,272			223,305		409			117,408
Discretionary Portfolio		134,544		(10,027	)		90,546			49,219		(13,037	)		25,668
Residential Mortgage Banking		153,760		22,183			49,611			125,561		21,417			24,616
Retail Banking		346,917		272			85,358			402,683		267			110,246
All Other		209,114		(14,128	)		(18,447	)		275,788		(10,994	)		(185,774	)
Total	$	1,486,993		—			447,249		$	1,506,165		—			268,822

	Average Total Assets
	Three Months Ended March 31				Year Ended December 31
	2021		2020		2020
	(In millions)
Business Banking	$	8,622		6,006		8,152
Commercial Banking		30,395		29,172		30,338
Commercial Real Estate		26,097		24,849		25,792
Discretionary Portfolio		23,650		27,143		27,726
Residential Mortgage Banking		6,506		3,218		4,038
Retail Banking		17,216		16,002		16,438
All Other		35,671		14,195		22,996
Total	$	148,157		120,585		135,480

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Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

3 Months Ended

Mar. 31, 2021

Text Block [Abstract]

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

15. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

M&T holds a 20% minority interest in Bayview Lending Group LLC ("BLG"), a privately-held commercial mortgage company. That investment had no remaining carrying value at March 31, 2021 as a result of cumulative losses recognized and cash distributions received in prior years.  Cash distributions now received from BLG are recognized as income by M&T and included in other revenues from operations.  That income totaled $23 million for the three-month period ended March 31, 2020. There was no similar cash distribution during the three-month period ended March 31, 2021.

Bayview Financial Holdings, L.P. (together with its affiliates, "Bayview Financial"), a privately-held specialty finance company, is BLG's majority investor.  In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other.  The Company has obtained loan servicing rights for mortgage loans from BLG and Bayview Financial having outstanding principal balances of $1.9 billion at March 31, 2021 and December 31, 2020. Revenues from those servicing rights were $2 million and $3 million for the three-month periods ended March 31, 2021 and 2020, respectively. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances of $69.7 billion and $68.1 billion at March 31, 2021 and December 31, 2020, respectively.  Revenues earned for sub-servicing loans for Bayview Financial were $34 million and $37 million for the three-month periods ended March 31, 2021 and 2020, respectively. In addition, the Company held $73 million and $77 million of mortgage-backed securities in its held-to-maturity portfolio at March 31, 2021 and December 31, 2020, respectively, that were securitized by Bayview Financial. At March 31, 2021, the Company held $139 million of Bayview Financial’s $1.1 billion syndicated loan facility. In the first quarter of 2021, the Company purchased $965 million of delinquent FHA guaranteed mortgage loans, including past due accrued interest, from Bayview Financial for $1.0 billion. The servicing rights for such loans were retained by Bayview Financial, but the Company continues to sub-service the loans.

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Recent accounting developments

3 Months Ended

Mar. 31, 2021

Accounting Changes And Error Corrections [Abstract]

Recent accounting developments

16. Recent accounting developments

The following table provides a description of accounting standards that were adopted by the Company in 2021 as well as standards that are not effective that could have an impact to M&T’s consolidated financial statements upon adoption.

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Adopted in 2021
Clarifying the Interactions Between Equity Securities, Equity Method and Joint Ventures, and Derivatives and Hedging	The amendments clarify the following guidance: 1. That an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in the equity securities investments guidance immediately before applying or upon discontinuing the equity method of accounting. 2. For the purpose of applying the derivatives and hedging guidance an entity should not consider whether, upon the settlement of a forward contract or exercise of a purchased option, individually or with existing investments, the underlying securities would be accounted for under the equity method of accounting or the fair value option in accordance with the financial instruments guidance. An entity also would evaluate the remaining characteristics in the derivatives and hedging guidance to determine the accounting for those forward contracts and purchased options.	January 1, 2021	The Company adopted the amended guidance effective January 1, 2021 using a prospective transition method. The adoption did not have a material impact on the Company’s consolidated financial statements.

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Adopted in 2021
Simplifying the Accounting for Income Taxes	The amendments remove the following exceptions for accounting for income taxes: 1. Exception to the incremental approach for intraperiod tax allocation when there is a loss from continuing operations and income or a gain from other items (for example, discontinued operations or other comprehensive income) 2. Exception to the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment 3. Exception to the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary 4. Exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The amendments also simplify the accounting for income taxes by doing the following: 1. Requiring that an entity recognize a franchise tax (or similar tax) that is partially based on income as an income-based tax and account for any incremental amount incurred as a non-income-based tax.   2. Requiring that an entity evaluate when a step up in the tax basis of goodwill should be considered part of the business combination in which the book goodwill was originally recognized and when it should be considered a separate transaction. 3. Specifying that an entity is not required to allocate the consolidated amount of current and deferred tax expense to a legal entity that is not subject to tax in its separate financial statements. However, an entity may elect to do so (on an entity-by-entity basis) for a legal entity that is both not subject to tax and disregarded by the taxing authority. 4. Requiring that an entity reflect the effect of an enacted change in tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. 5. Making minor Codification improvements for income taxes related to employee stock ownership plans and investments in qualified affordable housing projects accounted for using the equity method.	January 1, 2021	The amendments related to separate financial statements of legal entities that are not subject to tax should be applied on a retrospective basis for all periods presented. The amendments related to changes in ownership of foreign equity method investments or foreign subsidiaries should be applied on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. The amendments related to franchise taxes that are partially based on income should be applied on either a retrospective basis for all periods presented or a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. All other amendments should be applied on a prospective basis. The adoption did not have a material impact on the Company’s consolidated financial statements.

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Not Yet Adopted as of March 31, 2021
Changes to Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity	The amendments reduce the number of accounting models for convertible debt instruments and convertible preferred stock.  The amendments also reduce form-over-substance-based guidance for the derivatives scope exception for contacts in an entity’s own equity. For convertible instruments, embedded conversion features no longer are separated from the host contract for convertible instruments with conversion features that are not required to be accounted for as derivatives, or that do not result in substantial premiums accounted for as paid-in capital. Consequently, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost and a convertible preferred stock will be accounted for as a single equity instrument measured at its historical cost, as long as no other features require bifurcation and recognition as derivatives. By removing those separation models, the interest rate of convertible debt instruments typically will be closer to the coupon interest rate on the instrument.  The amendments also require certain changes to EPS calculations for convertible instruments as well as additional disclosures relating to conditions that cause conversion features to be met. For contacts in an entity’s own equity, the amendments  revise the derivatives scope exception guidance as follows: 1. Remove the settlement in unregistered shares, collateral, and shareholder rights conditions from the settlement guidance. 2. Clarify that payment penalties for failure to timely file do not preclude equity classification. 3. Require instruments that are required to be classified as an asset or liability to be measured subsequently at fair value, with changes reported in earnings and disclosed in the financial statements. 4. Clarifiy that the scope of the disclosure requirements in the Contracts in an Entity’s Own Equity section of the Derivatives guidance applies only to freestanding instruments. 5. Clarify that the scope of the reassessment guidance in the Contracts in an Entity’s Own Equity section of the Derivatives guidance applies to both freestanding instruments and embedded features.	January 1, 2022 Early adoption permitted	The amendments can be applied either on a modified retrospective method of transition or a fully retrospective method of transition. In applying the modified retrospective method, the guidance should be applied to transactions outstanding as of the beginning of the fiscal year in which the amendments are adopted. Transactions that were settled (or expired) during prior reporting periods are unaffected. The cumulative effect of the change should be recognized as an adjustment to the opening balance of retained earnings at the date of adoption. If applying the fully retrospective method of transition, the cumulative effect of the change should be recognized as an adjustment to the opening balance of retained earnings in the first comparative period presented. The fair value option is allowed to be irrevocably elected for any financial instrument that is a convertible security upon adoption of the amendments. The Company has not yet decided on which transition method will be applied to the extent applicable. The Company does not expect the guidance will have a material impact on its consolidated financial statements.

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Significant accounting policies (Policies)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Basis of Accounting

The consolidated interim financial statements of M&T Bank Corporation (“M&T”) and subsidiaries (“the Company”) were compiled in accordance with generally accepted accounting principles (“GAAP”) using the accounting policies set forth in note 1 of Notes to Financial Statements included in Form 10-K for the year ended December 31, 2020 (“2020 Annual Report”). The financial statements contain all adjustments which are, in the opinion of management, necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the interim periods presented.

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Investment securities (Tables)

3 Months Ended

Mar. 31, 2021

Investments Debt And Equity Securities [Abstract]

Amortized Cost and Estimated Fair Value of Investment Securities

The amortized cost and estimated fair value of investment securities were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
March 31, 2021
Investment securities available for sale:
U.S. Treasury and federal agencies	$	6,851	$	163	$	1	$	7,013
Mortgage-backed securities:
Government issued or guaranteed		4,051,580		174,154		645		4,225,089
Privately issued		16		—		—		16
Other debt securities		136,439		2,295		6,415		132,319
		4,194,886		176,612		7,061		4,364,437
Investment securities held to maturity:
U.S. Treasury and federal agencies		3,000		—		—		3,000
Obligations of states and political subdivisions		851		4		—		855
Mortgage-backed securities:
Government issued or guaranteed		1,697,992		79,650		1,623		1,776,019
Privately issued		73,496		11,288		17,244		67,540
Other debt securities		2,796		—		—		2,796
		1,778,135		90,942		18,867		1,850,210
Total debt securities	$	5,973,021	$	267,554	$	25,928	$	6,214,647
Equity and other securities:
Readily marketable equity — at fair value	$	68,983	$	13,012	$	203	$	81,792
Other — at cost		386,303		—		—		386,303
Total equity and other securities	$	455,286	$	13,012	$	203	$	468,095
December 31, 2020
Investment securities available for sale:
U.S. Treasury and federal agencies	$	9,154	$	198	$	14	$	9,338
Mortgage-backed securities:
Government issued or guaranteed		4,475,406		208,787		755		4,683,438
Privately issued		16		—		—		16
Other debt securities		136,451		1,664		8,301		129,814
		4,621,027		210,649		9,070		4,822,606
Investment securities held to maturity:
U.S. Treasury and federal agencies		2,999		—		—		2,999
Obligations of states and political subdivisions		1,531		9		—		1,540
Mortgage-backed securities:
Government issued or guaranteed		1,664,443		100,176		11		1,764,608
Privately issued		77,155		11,056		17,938		70,273
Other debt securities		2,861		—		—		2,861
		1,748,989		111,241		17,949		1,842,281
Total debt securities	$	6,370,016	$	321,890	$	27,019	$	6,664,887
Equity and other securities:
Readily marketable equity — at fair value	$	67,891	$	25,094	$	—	$	92,985
Other — at cost		381,117		—		—		381,117
Total equity and other securities	$	449,008	$	25,094	$	—	$	474,102

Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity

At March 31, 2021, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:

	Amortized Cost		Estimated Fair Value
	(In thousands)
Debt securities available for sale:
Due in one year or less	$	2,482		2,501
Due after one year through five years		12,030		12,439
Due after five years through ten years		98,778		99,066
Due after ten years		30,000		25,326
		143,290		139,332
Mortgage-backed securities available for sale		4,051,596		4,225,105
	$	4,194,886		4,364,437
Debt securities held to maturity:
Due in one year or less	$	3,676		3,678
Due after one year through five years		175		177
Due after ten years		2,796		2,796
		6,647		6,651
Mortgage-backed securities held to maturity		1,771,488		1,843,559
	$	1,778,135		1,850,210

Investment Securities in Continuous Unrealized Loss Position

A summary of investment securities that as of March 31, 2021 and December 31, 2020 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:

	Less Than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
March 31, 2021
Investment securities available for sale:
U.S. Treasury and federal agencies	$	299		(1	)		—		—
Mortgage-backed securities:
Government issued or guaranteed		1,825		(8	)		25,724		(637	)
Other debt securities		2,401		(23	)		65,209		(6,392	)
		4,525		(32	)		90,933		(7,029	)
Investment securities held to maturity:
Mortgage-backed securities:
Government issued or guaranteed		199,549		(1,609	)		1,686		(14	)
Privately issued		—		—			51,443		(17,244	)
		199,549		(1,609	)		53,129		(17,258	)
Total	$	204,074		(1,641	)		144,062		(24,287	)
December 31, 2020
Investment securities available for sale:
U.S. Treasury and federal agencies	$	985		(14	)		—		—
Mortgage-backed securities:
Government issued or guaranteed		18,687		(356	)		16,556		(399	)
Other debt securities		16,055		(181	)		63,462		(8,120	)
		35,727		(551	)		80,018		(8,519	)
Investment securities held to maturity:
Mortgage-backed securities:
Government issued or guaranteed		2,039		(11	)		—		—
Privately issued		—		—			52,418		(17,938	)
		2,039		(11	)		52,418		(17,938	)
Total	$	37,766		(562	)		132,436		(26,457	)

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Loans and leases and the allowance for credit losses (Tables)

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Summary of Current, Past Due and Nonaccrual Loans

A summary of current, past due and nonaccrual loans as of  March 31, 2021 and December 31, 2020 follows:

	Current		30-89 Days Past Due		Accruing Loans Past Due 90 Days or More		Nonaccrual		Total
	(In thousands)
March 31, 2021
Commercial, financial, leasing, etc.	$	27,327,644		182,686		5,791		295,069	$	27,811,190
Real estate:
Commercial		26,369,232		175,904		26,996		824,079		27,396,211
Residential builder and developer		1,269,858		7,909		—		1,224		1,278,991
Other commercial construction		8,580,462		37,986		6,099		126,225		8,750,772
Residential		14,198,898		191,860		1,041,873		385,508		15,818,139
Residential — limited documentation		1,372,339		16,136		—		143,069		1,531,544
Consumer:
Home equity lines and loans		3,720,689		15,926		—		79,188		3,815,803
Recreational finance		7,228,228		26,821		—		27,218		7,282,267
Automobile		4,178,258		28,970		—		38,219		4,245,447
Other		1,319,323		8,292		3,794		37,307		1,368,716
Total	$	95,564,931		692,490		1,084,553		1,957,106	$	99,299,080

December 31, 2020
Commercial, financial, leasing, etc.	$	27,196,862	60,822	10,053	306,827	$	27,574,564
Real estate:
Commercial		26,688,515	168,917	47,014	775,894		27,680,340
Residential builder and developer		1,246,095	1,693	856	1,094		1,249,738
Other commercial construction		8,523,591	66,365	3,816	114,039		8,707,811
Residential		13,764,836	200,406	792,888	365,729		15,123,859
Residential — limited documentation		1,462,277	19,687	—	147,170		1,629,134
Consumer:
Home equity lines and loans		3,881,885	24,329	—	79,392		3,985,606
Recreational finance		7,002,643	47,161	—	25,519		7,075,323
Automobile		4,007,349	55,498	—	39,404		4,102,251
Other		1,346,868	17,561	4,581	38,231		1,407,241
Total	$	95,120,921	662,439	859,208	1,893,299	$	98,535,867

Summary of Outstanding Loan Balances Related To COVID-19 Modifications Granted

4. Loans and leases and the allowance for credit losses, continued

A summary of outstanding loan balances for which COVID-19 related modifications were granted as of March 31, 2021 is presented below. These loans meet the criteria described in note 1 of Notes to Financial Statements in the 2020 Annual Report and, accordingly, are not considered past due or otherwise in default of loan terms as of the date presented. Substantially all of the modifications noted below expire during 2021.

	COVID-19 Related Modifications
March 31, 2021	Payment Deferrals(1)			Other Forbearances(2)		Total
	(In thousands)
Commercial, financial, leasing, etc.	$	60,819		$	156,491	$	217,310
Real estate:
Commercial		507,491			361,664		869,155
Other commercial construction		72,452			100,901		173,353
Residential		3,017,626	(3)		—		3,017,626
Residential — limited    documentation		296,987			—		296,987
Consumer:
Home equity lines and loans		18,529			—		18,529
Recreational finance		14,161			—		14,161
Automobile		24,882			—		24,882
Other		994			—		994
Total	$	4,013,941		$	619,056	$	4,632,997

Summary of Loan grades applied various classes of Commercial and Real Estate Loans

The following table summarizes the loan grades applied at March 31, 2021 to the various classes of the Company’s commercial loans and commercial real estate loans by origination year.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Commercial, financial, leasing, etc.:
Loan grades:
Pass	$	3,124,732		5,923,267		2,096,560		1,384,745		690,770		1,959,774		10,864,179		18,253	$	26,062,280
Criticized accrual		182,972		335,409		107,197		109,828		54,978		112,406		536,752		14,299		1,453,841
Criticized nonaccrual		684		6,652		30,437		58,718		16,522		68,214		105,392		8,450		295,069
Total commercial,    financial, leasing, etc.	$	3,308,388		6,265,328		2,234,194		1,553,291		762,270		2,140,394		11,506,323		41,002	$	27,811,190
Real estate:
Commercial:
Loan grades:
Pass	$	631,465		3,077,590		4,586,114		3,077,605		2,507,906		7,513,879		850,376		—	$	22,244,935
Criticized accrual		720		584,844		556,339		833,519		269,903		2,014,016		67,856		—		4,327,197
Criticized nonaccrual		—		33,509		123,364		46,519		141,610		469,332		9,745		—		824,079
Total commercial real    estate	$	632,185		3,695,943		5,265,817		3,957,643		2,919,419		9,997,227		927,977		—	$	27,396,211
Residential builder and developer:
Loan grades:
Pass	$	157,050		429,172		194,524		83,260		8,844		19,738		253,319		—	$	1,145,907
Criticized accrual		—		2,550		107,946		15,097		630		1,847		3,790		—		131,860
Criticized nonaccrual		—		—		518		—		—		706		—		—		1,224
Total residential builder    and developer	$	157,050		431,722		302,988		98,357		9,474		22,291		257,109		—	$	1,278,991
Other commercial construction:
Loan grades:
Pass	$	169,597		1,346,451		3,120,357		1,603,206		649,578		484,087		71,183		—	$	7,444,459
Criticized accrual		1,130		22,703		167,294		548,509		301,956		138,496		—		—		1,180,088
Criticized nonaccrual		—		336		78,901		13,435		4,130		24,032		5,391		—		126,225
Total other commercial    construction	$	170,727		1,369,490		3,366,552		2,165,150		955,664		646,615		76,574		—	$	8,750,772

The following table summarizes the loan grades applied at December 31, 2020 to the various classes of the Company’s commercial loans and commercial real estate loans by origination year.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Commercial, financial, leasing, etc.:
Loan grades:
Pass	$	7,732,728		2,277,233		1,505,486		930,834		719,796		1,387,695		11,352,416		21,286	$	25,927,474
Criticized accrual		388,326		84,358		113,940		41,587		39,930		73,401		584,751		13,970		1,340,263
Criticized nonaccrual		7,720		27,309		56,227		16,808		19,681		45,471		125,893		7,718		306,827
Total commercial,    financial, leasing, etc.	$	8,128,774		2,388,900		1,675,653		989,229		779,407		1,506,567		12,063,060		42,974	$	27,574,564
Real estate:
Commercial:
Loan grades:
Pass	$	3,353,450		4,681,834		3,299,095		2,628,061		2,746,165		5,698,834		875,348		—	$	23,282,787
Criticized accrual		526,037		400,154		579,507		290,885		568,144		1,212,672		44,260		—		3,621,659
Criticized nonaccrual		26,876		121,899		47,144		99,293		197,319		248,949		34,414		—		775,894
Total commercial real    estate	$	3,906,363		5,203,887		3,925,746		3,018,239		3,511,628		7,160,455		954,022		—	$	27,680,340
Residential builder and developer:
Loan grades:
Pass	$	506,295		223,880		109,453		15,048		10,976		11,320		236,943		—	$	1,113,915
Criticized accrual		3,690		106,847		14,836		3,421		—		1,885		4,050		—		134,729
Criticized nonaccrual		—		518		—		—		—		576		—		—		1,094
Total residential builder    and developer	$	509,985		331,245		124,289		18,469		10,976		13,781		240,993		—	$	1,249,738
Other commercial construction:
Loan grades:
Pass	$	1,050,258		2,998,921		2,048,063		945,339		233,127		294,030		74,611		—	$	7,644,349
Criticized accrual		37,192		148,492		381,091		225,949		144,665		12,034		—		—		949,423
Criticized nonaccrual		335		65,592		13,522		4,213		12,097		12,873		5,407		—		114,039
Total other commercial    construction	$	1,087,785		3,213,005		2,442,676		1,175,501		389,889		318,937		80,018		—	$	8,707,811

Summary of loans in Accrual and Nonaccrual Status

.  A summary of loans in accrual and nonaccrual status at March 31, 2021 for the various classes of the Company’s residential real estate loans and consumer loans by origination year follows.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Residential:
Current	$	1,125,233		1,889,481		1,331,314		599,352		1,496,417		7,701,525		55,576		—	$	14,198,898
30-89 days past due		2,270		10,190		5,363		5,116		20,138		148,539		244		—		191,860
Accruing loans past due 90             days or more		—		97,784		28,810		40,613		248,186		626,480		—		—		1,041,873
Nonaccrual		508		19,705		12,889		3,571		5,003		343,638		194		—		385,508
Total residential	$	1,128,011		2,017,160		1,378,376		648,652		1,769,744		8,820,182		56,014		—	$	15,818,139
Residential - limited documentation:
Current	$	—		—		—		—		—		1,372,339		—		—	$	1,372,339
30-89 days past due		—		—		—		—		—		16,136		—		—		16,136
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		143,069		—		—		143,069
Total residential - limited    documentation	$	—		—		—		—		—		1,531,544		—		—	$	1,531,544
Consumer:
Home equity lines and loans:
Current	$	74		953		3,777		2,316		2,281		50,886		2,458,179		1,202,223	$	3,720,689
30-89 days past due		—		—		23		—		18		917		258		14,710		15,926
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		6,263		5,714		67,211		79,188
Total home equity lines and loans	$	74		953		3,800		2,316		2,299		58,066		2,464,151		1,284,144	$	3,815,803

4. Loans and leases and the allowance for credit losses, continued

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2021		2020		2019		2018		2017		Prior		Loans		Loans		Total
	(In thousands)
Recreational finance:
Current	$	678,012		2,637,664		1,631,536		841,575		588,596		850,845		—		—	$	7,228,228
30-89 days past due		459		5,467		5,584		4,372		4,709		6,230		—		—		26,821
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		147		2,217		4,494		4,741		4,697		10,922		—		—		27,218
Total recreational finance	$	678,618		2,645,348		1,641,614		850,688		598,002		867,997		—		—	$	7,282,267
Automobile:
Current	$	569,198		1,499,937		996,107		553,269		377,492		182,255		—		—	$	4,178,258
30-89 days past due		632		4,010		7,384		6,231		5,963		4,750		—		—		28,970
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		491		2,248		7,925		9,686		9,595		8,274		—		—		38,219
Total automobile	$	570,321		1,506,195		1,011,416		569,186		393,050		195,279		—		—	$	4,245,447
Other:
Current	$	42,958		145,146		121,021		45,113		27,818		30,171		905,388		1,708	$	1,319,323
30-89 days past due		1,224		455		630		256		114		533		4,823		257		8,292
Accruing loans past due 90             days or more		—		—		—		—		—		336		3,458		—		3,794
Nonaccrual		838		210		562		294		183		215		34,832		173		37,307
Total other	$	45,020		145,811		122,213		45,663		28,115		31,255		948,501		2,138	$	1,368,716
Total loans and leases at    March 31, 2021	$	6,690,394		18,077,950		15,326,970		9,890,946		7,438,037		24,310,850		16,236,649		1,327,284	$	99,299,080

A summary of loans in accrual and nonaccrual status at December 31, 2020 for the various classes of the Company’s residential real estate loans and consumer loans by origination year follows.

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Residential:
Current	$	2,722,862		1,416,259		618,736		1,318,094		718,235		6,898,756		71,894		—	$	13,764,836
30-89 days past due		13,496		7,781		7,258		13,477		7,947		150,447		—		—		200,406
Accruing loans past due 90             days or more		579		15,234		38,145		212,818		45,804		480,308		—		—		792,888
Nonaccrual		3,133		14,439		5,183		6,408		2,900		333,466		200		—		365,729
Total residential	$	2,740,070		1,453,713		669,322		1,550,797		774,886		7,862,977		72,094		—	$	15,123,859
Residential - limited documentation:
Current	$	—		—		—		—		—		1,462,277		—		—	$	1,462,277
30-89 days past due		—		—		—		—		—		19,687		—		—		19,687
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		147,170		—		—		147,170
Total residential - limited    documentation	$	—		—		—		—		—		1,629,134		—		—	$	1,629,134
Consumer:
Home equity lines and loans:
Current	$	773		3,983		1,591		2,016		162		51,554		2,569,621		1,252,185	$	3,881,885
30-89 days past due		—		—		—		—		—		1,148		939		22,242		24,329
Accruing loans past due 90             days or more		—		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		6,148		5,752		67,492		79,392
Total home equity lines and loans	$	773		3,983		1,591		2,016		162		58,850		2,576,312		1,341,919	$	3,985,606

4. Loans and leases and the allowance for credit losses, continued

	Term Loans by Origination Year												Revolving		Revolving Loans Converted to Term
	2020		2019		2018		2017		2016		Prior		Loans		Loans		Total
	(In thousands)
Recreational finance:
Current	$	2,796,359		1,751,766		907,595		630,151		352,414		564,358		—		—	$	7,002,643
30-89 days past due		9,548		11,255		8,519		6,638		2,938		8,263		—		—		47,161
Accruing loans past                due 90 days or                more		—		—		—		—		—		—		—		—		—
Nonaccrual		1,854		3,883		4,072		4,194		2,733		8,783		—		—		25,519
Total recreational finance	$	2,807,761		1,766,904		920,186		640,983		358,085		581,404		—		—	$	7,075,323
Automobile:
Current	$	1,595,636		1,106,782		629,338		440,604		171,017		63,972		—		—	$	4,007,349
30-89 days past due		6,461		14,140		12,542		12,899		6,373		3,083		—		—		55,498
Accruing loans past                due 90 days or                more		—		—		—		—		—		—		—		—		—
Nonaccrual		1,615		7,144		10,788		10,061		5,991		3,805		—		—		39,404
Total automobile	$	1,603,712		1,128,066		652,668		463,564		183,381		70,860		—		—	$	4,102,251
Other:
Current	$	160,424		137,617		53,702		32,556		4,526		28,970		927,217		1,856	$	1,346,868
30-89 days past due		1,879		1,130		577		2,301		42		557		10,594		481		17,561
Accruing loans past                due 90 days or                more		—		—		—		—		—		374		4,207		—		4,581
Nonaccrual		1,493		492		339		183		31		501		35,044		148		38,231
Total other	$	163,796		139,239		54,618		35,040		4,599		30,402		977,062		2,485	$	1,407,241
Total loans and leases at    December 31, 2020	$	20,949,019		15,628,942		10,466,749		7,893,838		6,013,013		19,233,367		16,963,561		1,387,378	$	98,535,867

Changes in Allowance for Credit Losses

Changes in the allowance for credit losses for the three months ended March 31, 2021 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(In thousands)
Beginning balance	$	405,846			670,719			103,590			556,232			—	$	1,736,387
Provision for credit losses		(72,418	)		99,471			(13,435	)		(38,618	)		—		(25,000	)
Net charge-offs
Charge-offs		(26,945	)		(60,652	)		(2,399	)		(32,929	)		—		(122,925	)
Recoveries		22,511			6,560			2,033			16,640			—		47,744
Net charge-offs		(4,434	)		(54,092	)		(366	)		(16,289	)		—		(75,181	)
Ending balance	$	328,994			716,098			89,789			501,325			—	$	1,636,206

4. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the three months ended March 31, 2020 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	366,094			322,201			56,033			229,118			77,625		$	1,051,071
Adoption of new accounting standard		(61,474	)		23,656			53,896			194,004			(77,625	)		132,457
Provision for credit losses		66,594			88,666			9,291			85,449			—			250,000
Net charge-offs
Charge-offs		(16,383	)		(1,272	)		(5,102	)		(44,947	)		—			(67,704	)
Recoveries		3,261			438			1,674			13,169			—			18,542
Net charge-offs		(13,122	)		(834	)		(3,428	)		(31,778	)		—			(49,162	)
Ending balance	$	358,092			433,689			115,792			476,793			—		$	1,384,366

Loan and Leases Considered Nonaccrual and Interest Income Recognized on Loans

4. Loans and leases and the allowance for credit losses, continued

Information with respect to loans and leases that were considered nonaccrual at the beginning and end of the reporting period and the interest income recognized on such loans for the three-month periods ended March 31, 2021 and 2020 follows.

	March 31, 2021						January 1, 2021		Three Months Ended March 31, 2021
	Amortized Cost with Allowance		Amortized Cost without Allowance		Total		Amortized Cost		Interest Income Recognized
	(In thousands)
Commercial, financial, leasing, etc.	$	211,894	$	83,175	$	295,069	$	306,827	$	3,085
Real estate:
Commercial		337,036		487,043		824,079		775,894		1,658
Residential builder and developer		1,224		—		1,224		1,094		33
Other commercial construction		24,186		102,039		126,225		114,039		41
Residential		186,374		199,134		385,508		365,729		4,498
Residential — limited documentation		84,342		58,727		143,069		147,170		79
Consumer:
Home equity lines and loans		44,548		34,640		79,188		79,392		952
Recreational finance		19,657		7,561		27,218		25,519		155
Automobile		33,270		4,949		38,219		39,404		49
Other		2,864		34,443		37,307		38,231		180
Total	$	945,395	$	1,011,711	$	1,957,106	$	1,893,299	$	10,730

	March 31, 2020						January 1, 2020		Three Months Ended March 31, 2020
	Amortized Cost with Allowance		Amortized Cost without Allowance		Total		Amortized Cost		Interest Income Recognized
	(In thousands)
Commercial, financial, leasing, etc.	$	153,924	$	132,723	$	286,647	$	346,743	$	1,738
Real estate:
Commercial		62,675		125,794		188,469		173,796		1,092
Residential builder and developer		3,204		—		3,204		4,708		48
Other commercial construction		12,039		22,896		34,935		35,881		861
Residential		67,221		226,417		293,638		322,504		6,819
Residential — limited documentation		26,444		92,873		119,317		114,667		201
Consumer:
Home equity lines and loans		26,230		36,841		63,071		65,039		1,459
Recreational finance		6,704		6,701		13,405		14,308		152
Automobile		9,802		9,449		19,251		21,293		47
Other		4,182		35,629		39,811		35,394		154
Total	$	372,425	$	689,323	$	1,061,748	$	1,134,333	$	12,571

Loan Modification Activities that were Considered Troubled Debt Restructurings

The table that follows summarizes the Company’s loan modification activities that were considered troubled debt restructurings for the three-month periods ended March 31, 2021 and 2020:  

					Post-modification (a)
	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
Three Months Ended March 31, 2021	(Dollars in thousands)
Commercial, financial, leasing, etc.		93	$	53,733	$	24,653	$	—	$	—	$	28,504	$	53,157
Real estate:
Commercial		33		26,870		11,160		—		2,214		12,422		25,796
Residential		123		39,583		38,557		—		—		1,117		39,674
Residential — limited documentation		10		1,116		1,059		—		—		—		1,059
Consumer:
Home equity lines and loans		26		1,715		1,486		—		—		174		1,660
Recreational finance		72		2,212		2,212		—		—		—		2,212
Automobile		276		4,969		4,955		—		—		14		4,969
Other		222		1,434		1,434		—		—		—		1,434
Total		855	$	131,632	$	85,516	$	—	$	2,214	$	42,231	$	129,961
Three Months Ended March 31, 2020
Commercial, financial, leasing, etc.		32	$	12,692	$	5,066	$	—	$	—	$	6,987	$	12,053
Real estate:
Commercial		10		39,642		1,355		—		—		35,968		37,323
Residential		27		10,178		3,247		—		—		8,977		12,224
Residential — limited documentation		9		2,980		2,667		—		—		1,232		3,899
Consumer:
Home equity lines and loans		6		738		412		—		—		334		746
Recreational finance		3		90		90		—		—		—		90
Automobile		9		182		182		—		—		—		182
Total		96	$	66,502	$	13,019	$	—	$	—	$	53,498	$	66,517

(a) Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.  The present value of interest rate concessions, discounted at the effective rate of the original loan, was not material.

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Revenue from contracts with customers (Tables)

3 Months Ended

Mar. 31, 2021

ASU 2014-09 [Member]

Summary of Sources of Noninterest Income that are Subject to Noted Accounting Guidance

The following tables summarize sources of the Company’s noninterest income during the three-month periods ended March 31, 2021 and 2020 that are subject to the noted accounting guidance.

	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
Three Months Ended March 31, 2021	(In thousands)
Classification in consolidated    statement of income
Service charges on deposit accounts	$	12,497		24,295		2,893		—		—		51,452		1,640	$	92,777
Trust income		—		—		—		—		—		—		156,022		156,022
Brokerage services income		—		—		—		—		—		—		13,113		13,113
Other revenues from operations:
Merchant discount and credit card fees		9,481		10,407		445		—		—		3,921		109		24,363
Other		—		958		1,091		384		1,722		5,807		12,948		22,910
	$	21,978		35,660		4,429		384		1,722		61,180		183,832	$	309,185
Three Months Ended March 31, 2020
Classification in consolidated    statement of income
Service charges on deposit accounts	$	15,250		24,157		2,812		—		—		61,670		2,272	$	106,161
Trust income		12		304		—		—		—		—		148,435		148,751
Brokerage services income		—		—		—		—		—		—		13,129		13,129
Other revenues from operations:
Merchant discount and credit card fees		10,331		13,316		849		—		—		2,271		400		27,167
Other		—		2,186		843		857		922		5,982		12,516		23,306
	$	25,593		39,963		4,504		857		922		69,923		176,752	$	318,514

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Pension plans and other postretirement benefits (Tables)

3 Months Ended

Mar. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Net Periodic Defined Benefit Cost for Defined Benefit Plans

Net periodic defined benefit cost for defined benefit plans consisted of the following:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended March 31
	2021			2020			2021			2020
	(In thousands)
Service cost	$	5,023			4,714			248		223
Interest cost on projected benefit obligation		15,434			17,886			327			419
Expected return on plan assets		(35,950	)		(31,475	)		—			—
Amortization of prior service cost (credit)		125			125			(1,175	)		(1,175	)
Amortization of net actuarial loss (gain)		22,150			13,950			(300	)		(300	)
Net periodic cost (benefit)	$	6,782			5,200			(900	)		(833	)

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Earnings per common share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Computations of Basic Earnings Per Common Share

The computations of basic earnings per common share follow:

	Three Months Ended March 31
	2021			2020
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	447,249		$	268,822
Less: Preferred stock dividends		(17,050	)		(17,078	)
Net income available to common equity		430,199			251,744
Less: Income attributable to unvested stock-based    compensation awards		(2,108	)		(1,043	)
Net income available to common shareholders	$	428,091		$	250,701
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation    awards		129,414			130,440
Less: Unvested stock-based compensation awards		(877	)		(744	)
Weighted-average shares outstanding		128,537			129,696
Basic earnings per common share	$	3.33		$	1.93

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Three Months Ended March 31
	2021			2020
	(In thousands, except per share)
Net income available to common equity	$	430,199		$	251,744
Less: Income attributable to unvested stock-based    compensation awards		(2,106	)		(1,043	)
Net income available to common shareholders	$	428,093		$	250,701
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation    awards		129,414			130,440
Less: Unvested stock-based compensation awards		(877	)		(744	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		132			59
Adjusted weighted-average shares outstanding		128,669			129,755
Diluted earnings per common share	$	3.33		$	1.93

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Comprehensive income (Tables)

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income: 

	Investment			Defined Benefit						Total Amount				Income
	Securities			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2021	$	195,386			(650,087	)		369,558		$	(85,143	)			22,111		$	(63,032	)
Other comprehensive income before reclassifications:
Unrealized holding losses, net		(32,025	)		—			—			(32,025	)			8,907			(23,118	)
Foreign currency translation adjustment		—			—			684			684				(136	)		548
Unrealized losses on cash flow hedges		—			—			(9,498	)		(9,498	)			2,571			(6,927	)
Total other comprehensive income before    reclassifications		(32,025	)		—			(8,814	)		(40,839	)			11,342			(29,497	)
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on    held-to-maturity (“HTM”) securities		990			—			—			990		(a)		(276	)		714
Gains realized in net income		(3	)		—			—			(3	)	(b)		1			(2	)
Accretion of net gain on terminated cash flow hedges		—			—			(30	)		(30	)	(c)		9			(21	)
Net yield adjustment from cash flow hedges currently in effect		—			—			(82,044	)		(82,044	)	(a)		22,215			(59,829	)
Amortization of prior service credit		—			(1,050	)		—			(1,050	)	(d)		384			(666	)
Amortization of actuarial losses		—			21,850			—			21,850		(d)		(7,995	)		13,855
Total other comprehensive income (loss)		(31,038	)		20,800			(90,888	)		(101,126	)			25,680			(75,446	)
Balance — March 31, 2021	$	164,348			(629,287	)		278,670		$	(186,269	)			47,791		$	(138,478	)
Balance — January 1, 2020	$	50,701			(464,548	)		133,888		$	(279,959	)			73,279		$	(206,680	)
Other comprehensive income before reclassifications:
Unrealized holding gains, net		131,423			—			—			131,423				(34,544	)		96,879
Foreign currency translation adjustment		—			—			(3,225	)		(3,225	)			282			(2,943	)
Unrealized gains on cash flow hedges		—			—			456,333			456,333				(119,970	)		336,363
Total other comprehensive income before    reclassifications		131,423			—			453,108			584,531				(154,232	)		430,299
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on    HTM securities		772			—			—			772		(a)		(203	)		569
Accretion of net gain on terminated cash flow hedges		—			—			(34	)		(34	)	(c)		9			(25	)
Net yield adjustment from cash flow hedges currently in effect		—			—			(32,041	)		(32,041	)	(a)		8,423			(23,618	)
Amortization of prior service credit		—			(1,050	)		—			(1,050	)	(d)		276			(774	)
Amortization of actuarial losses		—			13,650			—			13,650		(d)		(3,588	)		10,062
Total other comprehensive income		132,195			12,600			421,033			565,828				(149,315	)		416,513
Balance — March 31, 2020	$	182,896			(451,948	)		554,921		$	285,869				(76,036	)	$	209,833

(a) Included in interest income.

(b) Included in gain (loss) on bank investment securities.

(c) Included in interest expense.

(d) Included in other costs of operations.

Accumulated Other Comprehensive Income (Loss), Net

Accumulated other comprehensive income (loss), net consisted of the following:

				Defined
	Investment			Benefit
	Securities			Plans			Other			Total
	(In thousands)
Balance — December 31, 2020	$	144,602		$	(481,064	)	$	273,430		$	(63,032	)
Net gain (loss) during period		(22,406	)		13,189			(66,229	)		(75,446	)
Balance — March 31, 2021	$	122,196		$	(467,875	)	$	207,201		$	(138,478	)

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Derivative financial instruments (Tables)

3 Months Ended

Mar. 31, 2021

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Information about Interest Rate Swap Agreements

Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:

					Weighted-						Estimated
	Notional		Average		Average Rate						Fair Value
	Amount		Maturity		Fixed			Variable			Gain (Loss) (a)
	(In thousands)		(In years)								(In thousands)
March 31, 2021
Fair value hedges:
Fixed rate long-term borrowings (b)	$	1,650,000		3.1		2.86	%		0.75	%	$	(1,117	)
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(c)		36,050,000		0.9		1.80	%		0.11	%		(2,077	)
Total	$	37,700,000		1.0							$	(3,194	)
December 31, 2020
Fair value hedges:
Fixed rate long-term borrowings (b)	$	1,650,000		3.3		2.86	%		0.79	%	$	651
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(d)		49,400,000		0.9		2.22	%		0.15	%		425
Total	$	51,050,000		1.0							$	1,076

(a) Certain clearinghouse exchanges consider payments by counterparties for variation margin on derivative instruments to be settlements of those positions. The impact of such treatment at March 31, 2021 and December 31, 2020 was a reduction of the estimated fair value gains on interest rate swap agreements designated as fair value hedges of $70.6 million and $101.5 million, respectively, and on interest rate swap agreements designated as cash flow hedges of $283.1 million and $372.2 million, respectively.

(b) Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

(c) Includes notional amount and terms of $18.7 billion of forward-starting interest rate swap agreements that become effective in 2021 - 2022.

(d) Includes notional amount and terms of $32.1 billion of forward-starting interest rate swap agreements that become effective in  2021 - 2022.

Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:

	Asset Derivatives				Liability Derivatives
	Fair Value				Fair Value
	March 31,		December 31,		March 31,		December 31,
	2021		2020		2021		2020
	(In thousands)
Derivatives designated and qualifying as hedging instruments
Interest rate swap agreements (a)	$	172	$	1,968	$	3,366	$	892
Commitments to sell real estate loans (a)		6,270		1,488		146		8,458
		6,442		3,456		3,512		9,350
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans     for sale (a)		22,921		43,599		9,164		365
Commitments to sell real estate loans (a)		36,179		2,409		5,605		13,868
Trading:
Interest rate contracts (b)		629,458		1,008,913		84,567		105,768
Foreign exchange and other option and futures contracts (b)		8,786		9,608		10,672		11,134
		697,344		1,064,529		110,008		131,135
Total derivatives	$	703,786	$	1,067,985	$	113,520	$	140,485

(a) Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b) Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.  The impact of variation margin payments at March 31, 2021 and December 31, 2020 was a reduction of the estimated fair value of interest rate contracts in the trading account in an asset position of $54.6 million and $5.6 million, respectively, and in a liability position of $502.0 million and $806.5 million, respectively.

	Carrying Amount of the Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount of the Hedged Item
	March 31, 2021		December 31, 2020		March 31, 2021		December 31, 2020
	(In thousands)
Location in the Consolidated Balance Sheet    of the Hedged Items in Fair Value Hedges
Long-term debt	$	1,718,238	$	1,750,048	$	69,428	$	101,326

Information about Fair Values of Derivative Instruments in Consolidated Statement of Income

	Amount of Gain (Loss) Recognized
	Three Months Ended March 31, 2021					Three Months Ended March 31, 2020
	Derivative			Hedged Item		Derivative		Hedged Item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(32,658	)		31,898	$	88,710		(87,824	)
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(3,234	)			$	12,786
Foreign exchange and other option and futures contracts (b)		1,608					4,352
Total	$	(1,626	)			$	17,138

(a) Reported as an adjustment to interest expense.

(b) Reported as trading account and foreign exchange gains.  

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Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis

The following tables present assets and liabilities at March 31, 2021 and December 31, 2020 measured at estimated fair value on a recurring basis:

	Fair Value Measurements		Level 1		Level 2		Level 3
	(In thousands)
March 31, 2021
Trading account assets	$	687,359	$	49,115	$	638,244	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		7,013		—		7,013		—
Mortgage-backed securities:
Government issued or guaranteed		4,225,089		—		4,225,089		—
Privately issued		16		—		—		16
Other debt securities		132,319		—		132,319		—
		4,364,437		—		4,364,421		16
Equity securities		81,792		64,150		17,642		—
Real estate loans held for sale		871,026		—		871,026		—
Other assets (a)		65,542		—		42,621		22,921
Total assets	$	6,070,156	$	113,265	$	5,933,954	$	22,937
Trading account liabilities	$	95,239	$	—	$	95,239	$	—
Other liabilities (a)		18,281		—		9,117		9,164
Total liabilities	$	113,520	$	—	$	104,356	$	9,164
December 31, 2020
Trading account assets	$	1,068,581	$	50,060	$	1,018,521	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		9,338		—		9,338		—
Mortgage-backed securities:
Government issued or guaranteed		4,683,438		—		4,683,438		—
Privately issued		16		—		—		16
Other debt securities		129,814		—		129,814		—
		4,822,606		—		4,822,590		16
Equity securities		92,985		63,129		29,856		—
Real estate loans held for sale		1,054,676		—		1,054,676		—
Other assets (a)		49,464		—		5,865		43,599
Total assets	$	7,088,312	$	113,189	$	6,931,508	$	43,615
Trading account liabilities	$	116,902	$	—	$	116,902	$	—
Other liabilities (a)		23,583		—		23,218		365
Total liabilities	$	140,485	$	—	$	140,120	$	365

 (a) Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

Changes In Level Three Assets And Liabilities Measured At Estimated Fair Value On Recurring Basis Table Text Block

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended March 31, 2021 and 2020 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities		Other Assets and Other Liabilities
2021	(In thousands)
Balance — January 1, 2021	$	16		43,234
Total gains realized/unrealized:
Included in earnings		—		6,025		(a)
Transfers out of Level 3		—		(35,502	)	(b)
Balance — March 31, 2021	$	16		13,757
Changes in unrealized gains included in earnings    related to assets still held at March 31, 2021	$	—		5,300		(a)

2020
Balance — January 1, 2020	$	16	10,740
Total gains realized/unrealized:
Included in earnings		—	44,081		(a)
Transfers out of Level 3		—	(19,794	)	(b)
Balance — March 31, 2020	$	16	35,027
Changes in unrealized gains included in earnings    related to assets still held at March 31, 2020	$	—	32,584		(a)

(a) Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(b) Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

Quantitative Information Related To Significant Unobservable Inputs Table Text Block

The following tables present quantitative information about significant unobservable inputs used in the fair value measurements for certain Level 3 assets and liabilities at March 31, 2021 and December 31, 2020:

	Fair Value		Valuation Technique	Unobservable Inputs/Assumptions		Range (Weighted- Average)
	(In thousands)
March 31, 2021
Recurring fair value measurements
Privately issued mortgage-    backed securities	$	16	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		13,757	Discounted cash flow	Commitment expirations		0% - 98% (18%)
December 31, 2020
Recurring fair value measurements
Privately issued mortgage-    backed securities	$	16	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		43,234	Discounted cash flow	Commitment expirations		0% - 98% (16%)

(a) Other Level 3 assets (liabilities) consist of commitments to originate real estate loans.

Carrying Amounts and Estimated Fair Value for Financial Instrument Assets (Liabilities)

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:

	March 31, 2021
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
	(In thousands)
Financial assets:
Cash and cash equivalents	$	1,258,989			1,258,989			1,213,877		45,112			—
Interest-bearing deposits at banks		31,407,227			31,407,227			—		31,407,227			—
Federal funds sold		1,000			1,000			—		1,000			—
Trading account assets		687,359			687,359			49,115		638,244			—
Investment securities		6,610,667			6,682,742			64,150		6,551,036			67,556
Loans and leases:
Commercial loans and leases		27,811,190			27,509,182			—		—			27,509,182
Commercial real estate loans		37,425,974			36,661,758			—		98,513			36,563,245
Residential real estate loans		17,349,683			17,501,398			—		4,015,464			13,485,934
Consumer loans		16,712,233			16,781,406			—		—			16,781,406
Allowance for credit losses		(1,636,206	)		—			—		—			—
Loans and leases, net		97,662,874			98,453,744			—		4,113,977			94,339,767
Accrued interest receivable		440,658			440,658			—		440,658			—
Financial liabilities:
Noninterest-bearing deposits	$	(53,641,419	)		(53,641,419	)		—		(53,641,419	)		—
Savings and interest-checking deposits		(70,679,036	)		(70,679,036	)		—		(70,679,036	)		—
Time deposits		(3,514,219	)		(3,526,947	)		—		(3,526,947	)		—
Deposits at Cayman Islands office		(641,691	)		(641,691	)		—		(641,691	)		—
Short-term borrowings		(58,957	)		(58,957	)		—		(58,957	)		—
Long-term borrowings		(3,498,503	)		(3,609,625	)		—		(3,609,625	)		—
Accrued interest payable		(43,745	)		(43,745	)		—		(43,745	)		—
Trading account liabilities		(95,239	)		(95,239	)		—		(95,239	)		—
Other financial instruments:
Commitments to originate real estate    loans for sale	$	13,757			13,757			—		—			13,757
Commitments to sell real estate loans		36,698			36,698			—		36,698			—
Other credit-related commitments		(134,928	)		(134,928	)		—		—			(134,928	)
Interest rate swap agreements used for    interest rate risk management		(3,194	)		(3,194	)		—		(3,194	)		—

12. Fair value measurements, continued

	December 31, 2020
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
				(In thousands)
Financial assets:
Cash and cash equivalents	$	1,552,743			1,552,743			1,497,457		55,286			—
Interest-bearing deposits at banks		23,663,810			23,663,810			—		23,663,810			—
Trading account assets		1,068,581			1,068,581			50,060		1,018,521			—
Investment securities		7,045,697			7,138,989			63,129		7,005,571			70,289
Loans and leases:
Commercial loans and leases		27,574,564			27,220,699			—		—			27,220,699
Commercial real estate loans		37,637,889			36,816,580			—		277,911			36,538,669
Residential real estate loans		16,752,993			17,089,141			—		4,135,655			12,953,486
Consumer loans		16,570,421			16,554,050			—		—			16,554,050
Allowance for credit losses		(1,736,387	)		—			—		—			—
Loans and leases, net		96,799,480			97,680,470			—		4,413,566			93,266,904
Accrued interest receivable		419,936			419,936			—		419,936			—
Financial liabilities:
Noninterest-bearing deposits	$	(47,572,884	)		(47,572,884	)		—		(47,572,884	)		—
Savings and interest-checking deposits		(67,680,840	)		(67,680,840	)		—		(67,680,840	)		—
Time deposits		(3,899,910	)		(3,919,367	)		—		(3,919,367	)		—
Deposits at Cayman Islands office		(652,104	)		(652,104	)		—		(652,104	)		—
Short-term borrowings		(59,482	)		(59,482	)		—		(59,482	)		—
Long-term borrowings		(4,382,193	)		(4,490,433	)		—		(4,490,433	)		—
Accrued interest payable		(59,916	)		(59,916	)		—		(59,916	)		—
Trading account liabilities		(116,902	)		(116,902	)		—		(116,902	)		—
Other financial instruments:
Commitments to originate real estate    loans for sale	$	43,234			43,234			—		—			43,234
Commitments to sell real estate loans		(18,429	)		(18,429	)		—		(18,429	)		—
Other credit-related commitments		(133,354	)		(133,354	)		—		—			(133,354	)
Interest rate swap agreements used    for interest rate risk management		1,076			1,076			—		1,076			—

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Commitments and contingencies (Tables)

3 Months Ended

Mar. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities Outstanding

The following table presents the Company's significant commitments.  Certain of these commitments are not included in the Company's consolidated balance sheet.

	March 31,		December 31,
	2021		2020
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,626,965	$	5,563,854
Commercial real estate loans to be sold		249,514		363,735
Other commercial real estate		6,426,199		7,237,367
Residential real estate loans to be sold		1,081,889		1,026,118
Other residential real estate		600,212		665,259
Commercial and other		20,140,102		19,427,886
Standby letters of credit		2,231,893		2,241,417
Commercial letters of credit		13,260		27,332
Financial guarantees and indemnification contracts		4,365,308		4,220,531
Commitments to sell real estate loans		1,881,140		2,108,823

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Segment information (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Information about Company's Segments

Information about the Company's segments is presented in the following table:

	Three Months Ended March 31
	2021								2020
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)			Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	155,903		669			46,271		$	137,833		885			32,926
Commercial Banking		285,912		809			122,638			291,776		1,053			143,732
Commercial Real Estate		200,843		222			71,272			223,305		409			117,408
Discretionary Portfolio		134,544		(10,027	)		90,546			49,219		(13,037	)		25,668
Residential Mortgage Banking		153,760		22,183			49,611			125,561		21,417			24,616
Retail Banking		346,917		272			85,358			402,683		267			110,246
All Other		209,114		(14,128	)		(18,447	)		275,788		(10,994	)		(185,774	)
Total	$	1,486,993		—			447,249		$	1,506,165		—			268,822

	Average Total Assets
	Three Months Ended March 31				Year Ended December 31
	2021		2020		2020
	(In millions)
Business Banking	$	8,622		6,006		8,152
Commercial Banking		30,395		29,172		30,338
Commercial Real Estate		26,097		24,849		25,792
Discretionary Portfolio		23,650		27,143		27,726
Residential Mortgage Banking		6,506		3,218		4,038
Retail Banking		17,216		16,002		16,438
All Other		35,671		14,195		22,996
Total	$	148,157		120,585		135,480

Total revenues are comprised of net interest income and other income.  Net interest income is the difference between taxable-equivalent interest earned on assets and interest paid on liabilities owed by a segment and a funding charge (credit) based on the Company's internal funds transfer and allocation methodology.  Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits).  The taxable-equivalent adjustment aggregated $3,733,000 and $5,063,000 for the three-month periods ended March 31, 2021 and 2020, respectively, and is eliminated in "All Other" total revenues.  Intersegment revenues are included in total revenues of the reportable segments.  The elimination of intersegment revenues is included in the determination of "All Other" total revenues.

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Acquisition - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Feb. 22, 2021	Mar. 31, 2021
Peoples United Financial Inc
Business Acquisition [Line Items]
Business combination, market value	$ 7,700
Common stock, price per share		$ 151.61
Assets	64,200
Loans	42,800
Deposits		$ 53,500
Liabilities	56,600
Stockholders’ equity	$ 7,600
Peoples United Financial Inc | Investment Banking, Legal and Other Services [Member]
Business Acquisition [Line Items]
Merger-related expenses		$ 10
M T
Business Acquisition [Line Items]
Common stock, price per share	$ 0.118

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Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	$ 4,194,886	$ 4,621,027
Investment securities available for sale, gross unrealized gains	176,612	210,649
Investment securities available for sale, gross unrealized losses	7,061	9,070
Investment securities available for sale, estimated fair value	4,364,437	4,822,606
Amortized cost for held to maturity	1,778,135	1,748,989
Gross unrealized gains for held to maturity	90,942	111,241
Gross unrealized losses for held to maturity	18,867	17,949
Estimated fair value for held to maturity	1,850,210	1,842,281
Equity and other securities, Amortized Cost	455,286	449,008
Equity securities, Gross Unrealized Gains	13,012	25,094
Equity securities, Gross Unrealized Losses	203
Equity and other securities, Estimated Fair Value	468,095	474,102
Other securities, Amortized cost	386,303	381,117
Other securities, Estimated fair value	386,303	381,117
Total debt securities Amortized cost	5,973,021	6,370,016
Total debt securities Gross unrealized gains	267,554	321,890
Total debt securities Gross unrealized losses	25,928	27,019
Total debt securities Estimated fair value	6,214,647	6,664,887
Readily marketable securities Amortized cost	68,983	67,891
Readily marketable securities Gross unrealized gains	13,012	25,094
Readily marketable securities Gross unrealized losses	203
Readily marketable securities Estimated fair value	81,792	92,985
U.S. Treasury and Federal Agencies [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	6,851	9,154
Investment securities available for sale, gross unrealized gains	163	198
Investment securities available for sale, gross unrealized losses	1	14
Investment securities available for sale, estimated fair value	7,013	9,338
Amortized cost for held to maturity	3,000	2,999
Estimated fair value for held to maturity	3,000	2,999
Obligations of States and Political Subdivisions [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Amortized cost for held to maturity	851	1,531
Gross unrealized gains for held to maturity	4	9
Estimated fair value for held to maturity	855	1,540
Government Issued or Guaranteed [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	4,051,580	4,475,406
Investment securities available for sale, gross unrealized gains	174,154	208,787
Investment securities available for sale, gross unrealized losses	645	755
Investment securities available for sale, estimated fair value	4,225,089	4,683,438
Amortized cost for held to maturity	1,697,992	1,664,443
Gross unrealized gains for held to maturity	79,650	100,176
Gross unrealized losses for held to maturity	1,623	11
Estimated fair value for held to maturity	1,776,019	1,764,608
Privately Issued [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	16	16
Investment securities available for sale, estimated fair value	16	16
Amortized cost for held to maturity	73,496	77,155
Gross unrealized gains for held to maturity	11,288	11,056
Gross unrealized losses for held to maturity	17,244	17,938
Estimated fair value for held to maturity	67,540	70,273
Other Debt Securities [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	136,439	136,451
Investment securities available for sale, gross unrealized gains	2,295	1,664
Investment securities available for sale, gross unrealized losses	6,415	8,301
Investment securities available for sale, estimated fair value	132,319	129,814
Amortized cost for held to maturity	2,796	2,861
Estimated fair value for held to maturity	$ 2,796	$ 2,861

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Investment Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2021 USD ($) Security	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Investment Holdings [Line Items]
Gross realized gains(loss) on sale of investment securities	$ 0	$ 0
Gains (losses) on equity securities	$ 12,282,000	$ 20,782,000
Number of debt securities with aggregate gross unrealized losses | Security	281
Unrealized losses on individual debt securities	$ (26,000,000)
Cost method equity securities	386,000,000
Available-for-Sale Securities [Member]
Investment Holdings [Line Items]
Allowance for credit losses	$ 0		$ 0

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Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt securities available for sale:
Due in one year or less	$ 2,482
Due after one year through five years	12,030
Due after five years through ten years	98,778
Due after ten years	30,000
Total available for sale (amortized cost)	143,290
Mortgage-backed securities available for sale	4,051,596
Investment securities available for sale, amortized cost	4,194,886	$ 4,621,027
Debt securities held to maturity:
Due in one year or less	3,676
Due after one year through five years	175
Due after ten years	2,796
Total available for held to maturity (amortized cost)	6,647
Mortgage-backed securities held to maturity	1,771,488
Amortized cost for held to maturity	1,778,135	1,748,989
Debt securities available for sale:
Due in one year or less	2,501
Due after one year through five years	12,439
Due after five years through ten years	99,066
Due after ten years	25,326
Total available for sale (fair value)	139,332
Mortgage-backed securities available for sale	4,225,105
Total	4,364,437	4,822,606
Debt securities held to maturity:
Due in one year or less	3,678
Due after one year through five years	177
Due after ten years	2,796
Total available for held to maturity (fair value)	6,651
Mortgage-backed securities held to maturity	1,843,559
Total	$ 1,850,210	$ 1,842,281

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Investment Securities - Investment Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	$ 4,525	$ 35,727
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(32)	(551)
Estimated fair value, 12 months or more	90,933	80,018
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(7,029)	(8,519)
Held to maturity, Estimated fair value, Less than 12 months	199,549	2,039
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses	(1,609)	(11)
Held to maturity, Estimated fair value, 12 months or more	53,129	52,418
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(17,258)	(17,938)
Total investment securities, fair value less than 12 months	204,074	37,766
Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses	(1,641)	(562)
Total of investment securities, fair value, 12 Months or More	144,062	132,436
Investment Securities Continuous Unrealized Loss Position Twelve Months or Longer Aggregate Losses	(24,287)	(26,457)
U.S. Treasury and Federal Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	299	985
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(1)	(14)
Government Issued or Guaranteed [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	1,825	18,687
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(8)	(356)
Estimated fair value, 12 months or more	25,724	16,556
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(637)	(399)
Held to maturity, Estimated fair value, Less than 12 months	199,549	2,039
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses	(1,609)	(11)
Held to maturity, Estimated fair value, 12 months or more	1,686
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(14)
Other Debt Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	2,401	16,055
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(23)	(181)
Estimated fair value, 12 months or more	65,209	63,462
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(6,392)	(8,120)
Privately Issued [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Held to maturity, Estimated fair value, 12 months or more	51,443	52,418
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	$ (17,244)	$ (17,938)

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Loans and Leases and the Allowance for Credit Losses - Summary of Current, Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 95,564,931	$ 95,120,921
30-89 Days Past Due	692,490	662,439
Accruing Loans Past Due 90 Days or More	1,084,553	859,208
Nonaccrual	1,957,106	1,893,299
Loans and leases, net of unearned discount	99,299,080	98,535,867
Commercial, Financial, Leasing, etc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	27,327,644	27,196,862
30-89 Days Past Due	182,686	60,822
Accruing Loans Past Due 90 Days or More	5,791	10,053
Nonaccrual	295,069	306,827
Loans and leases, net of unearned discount	27,811,190	27,574,564
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	26,369,232	26,688,515
30-89 Days Past Due	175,904	168,917
Accruing Loans Past Due 90 Days or More	26,996	47,014
Nonaccrual	824,079	775,894
Loans and leases, net of unearned discount	27,396,211	27,680,340
Residential Builder and Developer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,269,858	1,246,095
30-89 Days Past Due	7,909	1,693
Accruing Loans Past Due 90 Days or More		856
Nonaccrual	1,224	1,094
Loans and leases, net of unearned discount	1,278,991	1,249,738
Other Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	8,580,462	8,523,591
30-89 Days Past Due	37,986	66,365
Accruing Loans Past Due 90 Days or More	6,099	3,816
Nonaccrual	126,225	114,039
Loans and leases, net of unearned discount	8,750,772	8,707,811
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	14,198,898	13,764,836
30-89 Days Past Due	191,860	200,406
Accruing Loans Past Due 90 Days or More	1,041,873	792,888
Nonaccrual	385,508	365,729
Loans and leases, net of unearned discount	15,818,139	15,123,859
Residential Limited Documentation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,372,339	1,462,277
30-89 Days Past Due	16,136	19,687
Nonaccrual	143,069	147,170
Loans and leases, net of unearned discount	1,531,544	1,629,134
Home Equity Lines and Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	3,720,689	3,881,885
30-89 Days Past Due	15,926	24,329
Nonaccrual	79,188	79,392
Loans and leases, net of unearned discount	3,815,803	3,985,606
Recreational Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	7,228,228	7,002,643
30-89 Days Past Due	26,821	47,161
Nonaccrual	27,218	25,519
Loans and leases, net of unearned discount	7,282,267	7,075,323
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,178,258	4,007,349
30-89 Days Past Due	28,970	55,498
Nonaccrual	38,219	39,404
Loans and leases, net of unearned discount	4,245,447	4,102,251
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,319,323	1,346,868
30-89 Days Past Due	8,292	17,561
Accruing Loans Past Due 90 Days or More	3,794	4,581
Nonaccrual	37,307	38,231
Loans and leases, net of unearned discount	$ 1,368,716	$ 1,407,241

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Loans and Leases and the Allowance for Credit Losses - Summary of Outstanding Loan Balances Related to COVID-19 Modifications Granted (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		$ 129,961	$ 66,517
Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		85,516	13,019
C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		4,632,997
C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	4,013,941
C O V I D19 | Other Forbearances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[2]	619,056
Commercial, Financial, Leasing, etc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		53,157	12,053
Commercial, Financial, Leasing, etc. [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		24,653	5,066
Commercial, Financial, Leasing, etc. [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		217,310
Commercial, Financial, Leasing, etc. [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	60,819
Commercial, Financial, Leasing, etc. [Member] | C O V I D19 | Other Forbearances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[2]	156,491
Commercial [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		869,155
Commercial [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	507,491
Commercial [Member] | C O V I D19 | Other Forbearances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[2]	361,664
Other Commercial Construction [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		173,353
Other Commercial Construction [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	72,452
Other Commercial Construction [Member] | C O V I D19 | Other Forbearances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[2]	100,901
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		39,674	12,224
Residential [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		38,557	3,247
Residential [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		3,017,626
Residential [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1],[3]	3,017,626
Residential Limited Documentation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		1,059	3,899
Residential Limited Documentation [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		1,059	2,667
Residential Limited Documentation [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		296,987
Residential Limited Documentation [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	296,987
Home Equity Lines and Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		1,660	746
Home Equity Lines and Loans [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		1,486	412
Home Equity Lines and Loans [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		18,529
Home Equity Lines and Loans [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	18,529
Recreational Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		2,212	90
Recreational Finance [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		2,212	90
Recreational Finance [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		14,161
Recreational Finance [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	14,161
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		4,969	182
Automobile [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		4,955	$ 182
Automobile [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		24,882
Automobile [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	24,882
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		1,434
Other [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		1,434
Other [Member] | C O V I D19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount		994
Other [Member] | C O V I D19 | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned discount	[1]	$ 994

[1] Represents accruing loans at March 31, 2021 for which a COVID-19 related payment deferral (including maturity extensions) has been granted

[2] Consists predominantly of accruing loans for which a COVID-19 related covenant waiver has been granted

[3] Includes $2.4 billion of government-guaranteed loans

XML

Loans and Leases and the Allowance for Credit Losses - Summary of Outstanding Loan Balances Related to COVID-19 Modifications Granted - (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Loans and leases, net of unearned discount		$ 129,961	$ 66,517
Payment Deferral [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans and leases, net of unearned discount		85,516	$ 13,019
C O V I D19
Financing Receivable Allowance For Credit Losses [Line Items]
Loans and leases, net of unearned discount		4,632,997
C O V I D19 | Payment Deferral [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans and leases, net of unearned discount	[1]	4,013,941
C O V I D19 | Payment Deferral [Member] | Government-Guaranteed Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans and leases, net of unearned discount		$ 2,400,000

[1] Represents accruing loans at March 31, 2021 for which a COVID-19 related payment deferral (including maturity extensions) has been granted

XML

Loans and Leases and the Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Loans And Leases Receivable [Line Items]
Amount of foreclosed residential real estate property held	$ 24	$ 28
Loans secured by residential real estate that were in the process of foreclosure	$ 206	214
Percentage loans in the process of foreclosure, serviced by other entities, classified as government guaranteed	38.00%
Minimum [Member]
Loans And Leases Receivable [Line Items]
Loan delinquent period	90 days
Minimum [Member] | Commercial Loans and Commercial Real Estate [Member]
Loans And Leases Receivable [Line Items]
Amount of real estate loan as reported as accruing or nonaccruing	$ 1
Maximum [Member]
Loans And Leases Receivable [Line Items]
Loan delinquent period	150 days
Residential Mortgage Loans [Member] | One-to-Four Family Residential [Member]
Loans And Leases Receivable [Line Items]
Mortgage loans held for sale	$ 773	777
Commercial Real Estate Loans [Member] | One-to-Four Family Residential [Member]
Loans And Leases Receivable [Line Items]
Mortgage loans held for sale	$ 99	$ 278

XML

Loans and Leases and the Allowance for Credit Losses - Summary of Loan grades applied various classes of Commercial and Real Estate Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	$ 99,299,080	$ 98,535,867
Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	16,236,649	16,963,561
Revolving Loans Converted to Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,327,284	1,387,378
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	27,811,190	27,574,564
Commercial, Financial, Leasing, etc. [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	26,062,280	25,927,474
Commercial, Financial, Leasing, etc. [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,453,841	1,340,263
Commercial, Financial, Leasing, etc. [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	295,069	306,827
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	11,506,323	12,063,060
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	10,864,179	11,352,416
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	536,752	584,751
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	105,392	125,893
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans Converted to Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	41,002	42,974
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans Converted to Term Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	18,253	21,286
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans Converted to Term Loans [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	14,299	13,970
Commercial, Financial, Leasing, etc. [Member] | Revolving Loans Converted to Term Loans [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	8,450	7,718
Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	27,396,211	27,680,340
Commercial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	22,244,935	23,282,787
Commercial [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	4,327,197	3,621,659
Commercial [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	824,079	775,894
Commercial [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	927,977	954,022
Commercial [Member] | Revolving Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	850,376	875,348
Commercial [Member] | Revolving Loans [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	67,856	44,260
Commercial [Member] | Revolving Loans [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	9,745	34,414
Residential Builder and Developer [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,278,991	1,249,738
Residential Builder and Developer [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,145,907	1,113,915
Residential Builder and Developer [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	131,860	134,729
Residential Builder and Developer [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,224	1,094
Residential Builder and Developer [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	257,109	240,993
Residential Builder and Developer [Member] | Revolving Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	253,319	236,943
Residential Builder and Developer [Member] | Revolving Loans [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	3,790	4,050
Other Commercial Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	8,750,772	8,707,811
Other Commercial Construction [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	7,444,459	7,644,349
Other Commercial Construction [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,180,088	949,423
Other Commercial Construction [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	126,225	114,039
Other Commercial Construction [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	76,574	80,018
Other Commercial Construction [Member] | Revolving Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	71,183	74,611
Other Commercial Construction [Member] | Revolving Loans [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	5,391	5,407
Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	6,690,394	20,949,019	$ 18,077,950	$ 15,628,942	$ 15,326,970	$ 10,466,749	$ 9,890,946	$ 7,893,838	$ 7,438,037	$ 6,013,013
Term Loans [Member] | Commercial, Financial, Leasing, etc. [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	3,308,388	8,128,774	6,265,328	2,388,900	2,234,194	1,675,653	1,553,291	989,229	762,270	779,407
Term Loans [Member] | Commercial, Financial, Leasing, etc. [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	3,124,732	7,732,728	5,923,267	2,277,233	2,096,560	1,505,486	1,384,745	930,834	690,770	719,796
Term Loans [Member] | Commercial, Financial, Leasing, etc. [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	182,972	388,326	335,409	84,358	107,197	113,940	109,828	41,587	54,978	39,930
Term Loans [Member] | Commercial, Financial, Leasing, etc. [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	684	7,720	6,652	27,309	30,437	56,227	58,718	16,808	16,522	19,681
Term Loans [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	632,185	3,906,363	3,695,943	5,203,887	5,265,817	3,925,746	3,957,643	3,018,239	2,919,419	3,511,628
Term Loans [Member] | Commercial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	631,465	3,353,450	3,077,590	4,681,834	4,586,114	3,299,095	3,077,605	2,628,061	2,507,906	2,746,165
Term Loans [Member] | Commercial [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	720	526,037	584,844	400,154	556,339	579,507	833,519	290,885	269,903	568,144
Term Loans [Member] | Commercial [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount		26,876	33,509	121,899	123,364	47,144	46,519	99,293	141,610	197,319
Term Loans [Member] | Residential Builder and Developer [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	157,050	509,985	431,722	331,245	302,988	124,289	98,357	18,469	9,474	10,976
Term Loans [Member] | Residential Builder and Developer [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	157,050	506,295	429,172	223,880	194,524	109,453	83,260	15,048	8,844	10,976
Term Loans [Member] | Residential Builder and Developer [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount		3,690	2,550	106,847	107,946	14,836	15,097	3,421	630
Term Loans [Member] | Residential Builder and Developer [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount				518	518
Term Loans [Member] | Other Commercial Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	170,727	1,087,785	1,369,490	3,213,005	3,366,552	2,442,676	2,165,150	1,175,501	955,664	389,889
Term Loans [Member] | Other Commercial Construction [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	169,597	1,050,258	1,346,451	2,998,921	3,120,357	2,048,063	1,603,206	945,339	649,578	233,127
Term Loans [Member] | Other Commercial Construction [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,130	37,192	22,703	148,492	167,294	381,091	548,509	225,949	301,956	144,665
Term Loans [Member] | Other Commercial Construction [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount		335	$ 336	$ 65,592	$ 78,901	$ 13,522	$ 13,435	$ 4,213	$ 4,130	$ 12,097
Term Loans Prior Period [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	24,310,850	19,233,367
Term Loans Prior Period [Member] | Commercial, Financial, Leasing, etc. [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	2,140,394	1,506,567
Term Loans Prior Period [Member] | Commercial, Financial, Leasing, etc. [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,959,774	1,387,695
Term Loans Prior Period [Member] | Commercial, Financial, Leasing, etc. [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	112,406	73,401
Term Loans Prior Period [Member] | Commercial, Financial, Leasing, etc. [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	68,214	45,471
Term Loans Prior Period [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	9,997,227	7,160,455
Term Loans Prior Period [Member] | Commercial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	7,513,879	5,698,834
Term Loans Prior Period [Member] | Commercial [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	2,014,016	1,212,672
Term Loans Prior Period [Member] | Commercial [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	469,332	248,949
Term Loans Prior Period [Member] | Residential Builder and Developer [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	22,291	13,781
Term Loans Prior Period [Member] | Residential Builder and Developer [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	19,738	11,320
Term Loans Prior Period [Member] | Residential Builder and Developer [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,847	1,885
Term Loans Prior Period [Member] | Residential Builder and Developer [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	706	576
Term Loans Prior Period [Member] | Other Commercial Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	646,615	318,937
Term Loans Prior Period [Member] | Other Commercial Construction [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	484,087	294,030
Term Loans Prior Period [Member] | Other Commercial Construction [Member] | Criticized Accrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	138,496	12,034
Term Loans Prior Period [Member] | Other Commercial Construction [Member] | Criticized Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	$ 24,032	$ 12,873

XML

Loans and Leases and the Allowance for Credit Losses - Summary of loans in Accrual and Nonaccrual Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Current	$ 95,564,931	$ 95,120,921
30-89 Days Past Due	692,490	662,439
Accruing Loans Past Due 90 Days or More	1,084,553	859,208
Nonaccrual	1,957,106	1,893,299
Loans and leases, net of unearned discount	99,299,080	98,535,867
Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	16,236,649	16,963,561
Revolving Loans Converted to Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,327,284	1,387,378
Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Current	14,198,898	13,764,836
30-89 Days Past Due	191,860	200,406
Accruing Loans Past Due 90 Days or More	1,041,873	792,888
Nonaccrual	385,508	365,729
Loans and leases, net of unearned discount	15,818,139	15,123,859
Residential [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	55,576	71,894
30-89 Days Past Due	244
Nonaccrual	194	200
Loans and leases, net of unearned discount	56,014	72,094
Residential Limited Documentation [Member]
Financing Receivable Recorded Investment [Line Items]
Current	1,372,339	1,462,277
30-89 Days Past Due	16,136	19,687
Nonaccrual	143,069	147,170
Loans and leases, net of unearned discount	1,531,544	1,629,134
Home Equity Lines and Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	3,720,689	3,881,885
30-89 Days Past Due	15,926	24,329
Nonaccrual	79,188	79,392
Loans and leases, net of unearned discount	3,815,803	3,985,606
Home Equity Lines and Loans [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	2,458,179	2,569,621
30-89 Days Past Due	258	939
Nonaccrual	5,714	5,752
Loans and leases, net of unearned discount	2,464,151	2,576,312
Home Equity Lines and Loans [Member] | Revolving Loans Converted to Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	1,202,223	1,252,185
30-89 Days Past Due	14,710	22,242
Nonaccrual	67,211	67,492
Loans and leases, net of unearned discount	1,284,144	1,341,919
Recreational Finance [Member]
Financing Receivable Recorded Investment [Line Items]
Current	7,228,228	7,002,643
30-89 Days Past Due	26,821	47,161
Nonaccrual	27,218	25,519
Loans and leases, net of unearned discount	7,282,267	7,075,323
Automobile [Member]
Financing Receivable Recorded Investment [Line Items]
Current	4,178,258	4,007,349
30-89 Days Past Due	28,970	55,498
Nonaccrual	38,219	39,404
Loans and leases, net of unearned discount	4,245,447	4,102,251
Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current	1,319,323	1,346,868
30-89 Days Past Due	8,292	17,561
Accruing Loans Past Due 90 Days or More	3,794	4,581
Nonaccrual	37,307	38,231
Loans and leases, net of unearned discount	1,368,716	1,407,241
Other [Member] | Revolving Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	905,388	927,217
30-89 Days Past Due	4,823	10,594
Accruing Loans Past Due 90 Days or More	3,458	4,207
Nonaccrual	34,832	35,044
Loans and leases, net of unearned discount	948,501	977,062
Other [Member] | Revolving Loans Converted to Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	1,708	1,856
30-89 Days Past Due	257	481
Nonaccrual	173	148
Loans and leases, net of unearned discount	2,138	2,485
Term Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	6,690,394	20,949,019	$ 18,077,950	$ 15,628,942	$ 15,326,970	$ 10,466,749	$ 9,890,946	$ 7,893,838	$ 7,438,037	$ 6,013,013
Term Loans [Member] | Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Current	1,125,233	2,722,862	1,889,481	1,416,259	1,331,314	618,736	599,352	1,318,094	1,496,417	718,235
30-89 Days Past Due	2,270	13,496	10,190	7,781	5,363	7,258	5,116	13,477	20,138	7,947
Accruing Loans Past Due 90 Days or More		579	97,784	15,234	28,810	38,145	40,613	212,818	248,186	45,804
Nonaccrual	508	3,133	19,705	14,439	12,889	5,183	3,571	6,408	5,003	2,900
Loans and leases, net of unearned discount	1,128,011	2,740,070	2,017,160	1,453,713	1,378,376	669,322	648,652	1,550,797	1,769,744	774,886
Term Loans [Member] | Home Equity Lines and Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	74	773	953	3,983	3,777	1,591	2,316	2,016	2,281	162
30-89 Days Past Due					23				18
Loans and leases, net of unearned discount	74	773	953	3,983	3,800	1,591	2,316	2,016	2,299	162
Term Loans [Member] | Recreational Finance [Member]
Financing Receivable Recorded Investment [Line Items]
Current	678,012	2,796,359	2,637,664	1,751,766	1,631,536	907,595	841,575	630,151	588,596	352,414
30-89 Days Past Due	459	9,548	5,467	11,255	5,584	8,519	4,372	6,638	4,709	2,938
Nonaccrual	147	1,854	2,217	3,883	4,494	4,072	4,741	4,194	4,697	2,733
Loans and leases, net of unearned discount	678,618	2,807,761	2,645,348	1,766,904	1,641,614	920,186	850,688	640,983	598,002	358,085
Term Loans [Member] | Automobile [Member]
Financing Receivable Recorded Investment [Line Items]
Current	569,198	1,595,636	1,499,937	1,106,782	996,107	629,338	553,269	440,604	377,492	171,017
30-89 Days Past Due	632	6,461	4,010	14,140	7,384	12,542	6,231	12,899	5,963	6,373
Nonaccrual	491	1,615	2,248	7,144	7,925	10,788	9,686	10,061	9,595	5,991
Loans and leases, net of unearned discount	570,321	1,603,712	1,506,195	1,128,066	1,011,416	652,668	569,186	463,564	393,050	183,381
Term Loans [Member] | Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current	42,958	160,424	145,146	137,617	121,021	53,702	45,113	32,556	27,818	4,526
30-89 Days Past Due	1,224	1,879	455	1,130	630	577	256	2,301	114	42
Nonaccrual	838	1,493	210	492	562	339	294	183	183	31
Loans and leases, net of unearned discount	45,020	163,796	$ 145,811	$ 139,239	$ 122,213	$ 54,618	$ 45,663	$ 35,040	$ 28,115	$ 4,599
Term Loans Prior Period [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases, net of unearned discount	24,310,850	19,233,367
Term Loans Prior Period [Member] | Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Current	7,701,525	6,898,756
30-89 Days Past Due	148,539	150,447
Accruing Loans Past Due 90 Days or More	626,480	480,308
Nonaccrual	343,638	333,466
Loans and leases, net of unearned discount	8,820,182	7,862,977
Term Loans Prior Period [Member] | Residential Limited Documentation [Member]
Financing Receivable Recorded Investment [Line Items]
Current	1,372,339	1,462,277
30-89 Days Past Due	16,136	19,687
Nonaccrual	143,069	147,170
Loans and leases, net of unearned discount	1,531,544	1,629,134
Term Loans Prior Period [Member] | Home Equity Lines and Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current	50,886	51,554
30-89 Days Past Due	917	1,148
Nonaccrual	6,263	6,148
Loans and leases, net of unearned discount	58,066	58,850
Term Loans Prior Period [Member] | Recreational Finance [Member]
Financing Receivable Recorded Investment [Line Items]
Current	850,845	564,358
30-89 Days Past Due	6,230	8,263
Nonaccrual	10,922	8,783
Loans and leases, net of unearned discount	867,997	581,404
Term Loans Prior Period [Member] | Automobile [Member]
Financing Receivable Recorded Investment [Line Items]
Current	182,255	63,972
30-89 Days Past Due	4,750	3,083
Nonaccrual	8,274	3,805
Loans and leases, net of unearned discount	195,279	70,860
Term Loans Prior Period [Member] | Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current	30,171	28,970
30-89 Days Past Due	533	557
Accruing Loans Past Due 90 Days or More	336	374
Nonaccrual	215	501
Loans and leases, net of unearned discount	$ 31,255	$ 30,402

XML

Loans and Leases and the Allowance for Credit Losses - Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 1,736,387	$ 1,051,071
Provision for credit losses	(25,000)	250,000
Net charge-offs
Charge-offs	(122,925)	(67,704)
Recoveries	47,744	18,542
Net (charge-offs) recoveries	(75,181)	(49,162)
Ending balance	1,636,206	1,384,366
Adoption of new accounting standard		132,457
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	405,846	366,094
Provision for credit losses	(72,418)	66,594
Net charge-offs
Charge-offs	(26,945)	(16,383)
Recoveries	22,511	3,261
Net (charge-offs) recoveries	(4,434)	(13,122)
Ending balance	328,994	358,092
Adoption of new accounting standard		(61,474)
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	670,719	322,201
Provision for credit losses	99,471	88,666
Net charge-offs
Charge-offs	(60,652)	(1,272)
Recoveries	6,560	438
Net (charge-offs) recoveries	(54,092)	(834)
Ending balance	716,098	433,689
Adoption of new accounting standard		23,656
One-to-Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	103,590	56,033
Provision for credit losses	(13,435)	9,291
Net charge-offs
Charge-offs	(2,399)	(5,102)
Recoveries	2,033	1,674
Net (charge-offs) recoveries	(366)	(3,428)
Ending balance	89,789	115,792
Adoption of new accounting standard		53,896
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance		77,625
Net charge-offs
Adoption of new accounting standard		(77,625)
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	556,232	229,118
Provision for credit losses	(38,618)	85,449
Net charge-offs
Charge-offs	(32,929)	(44,947)
Recoveries	16,640	13,169
Net (charge-offs) recoveries	(16,289)	(31,778)
Ending balance	$ 501,325	476,793
Adoption of new accounting standard		$ 194,004

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Loans and Leases and the Allowance for Credit Losses - Loan and Leases Considered Nonaccrual and Interest Income Recognized on Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jan. 01, 2021	Jan. 01, 2020
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	$ 945,395	$ 372,425
Amortized Cost without Allowance	1,011,711	689,323
Total	1,957,106	1,061,748
Amortized Cost			$ 1,893,299	$ 1,134,333
Interest Income Recognized	10,730	12,571
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	211,894	153,924
Amortized Cost without Allowance	83,175	132,723
Total	295,069	286,647
Amortized Cost			306,827	346,743
Interest Income Recognized	3,085	1,738
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	337,036	62,675
Amortized Cost without Allowance	487,043	125,794
Total	824,079	188,469
Amortized Cost			775,894	173,796
Interest Income Recognized	1,658	1,092
Residential Builder and Developer [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	1,224	3,204
Total	1,224	3,204
Amortized Cost			1,094	4,708
Interest Income Recognized	33	48
Other Commercial Construction [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	24,186	12,039
Amortized Cost without Allowance	102,039	22,896
Total	126,225	34,935
Amortized Cost			114,039	35,881
Interest Income Recognized	41	861
Residential [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	186,374	67,221
Amortized Cost without Allowance	199,134	226,417
Total	385,508	293,638
Amortized Cost			365,729	322,504
Interest Income Recognized	4,498	6,819
Residential Limited Documentation [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	84,342	26,444
Amortized Cost without Allowance	58,727	92,873
Total	143,069	119,317
Amortized Cost			147,170	114,667
Interest Income Recognized	79	201
Home Equity Lines and Loans [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	44,548	26,230
Amortized Cost without Allowance	34,640	36,841
Total	79,188	63,071
Amortized Cost			79,392	65,039
Interest Income Recognized	952	1,459
Recreational Finance [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	19,657	6,704
Amortized Cost without Allowance	7,561	6,701
Total	27,218	13,405
Amortized Cost			25,519	14,308
Interest Income Recognized	155	152
Automobile [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	33,270	9,802
Amortized Cost without Allowance	4,949	9,449
Total	38,219	19,251
Amortized Cost			39,404	21,293
Interest Income Recognized	49	47
Other [Member]
Financing Receivable, Impaired [Line Items]
Amortized Cost with Allowance	2,864	4,182
Amortized Cost without Allowance	34,443	35,629
Total	37,307	39,811
Amortized Cost			$ 38,231	$ 35,394
Interest Income Recognized	$ 180	$ 154

XML

Loans and Leases and the Allowance for Credit Losses - Loan Modification Activities that were Considered Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) Modification	Mar. 31, 2020 USD ($) Modification
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	855	96
Pre-modification Recorded Investment	$ 131,632	$ 66,502
post modification recorded investment	129,961	66,517
Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	85,516	13,019
Other [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	2,214
Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 42,231	$ 53,498
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	93	32
Pre-modification Recorded Investment	$ 53,733	$ 12,692
post modification recorded investment	53,157	12,053
Commercial, Financial, Leasing, etc. [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	24,653	5,066
Commercial, Financial, Leasing, etc. [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 28,504	$ 6,987
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	33	10
Pre-modification Recorded Investment	$ 26,870	$ 39,642
post modification recorded investment	25,796	37,323
Commercial Real Estate [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	11,160	1,355
Commercial Real Estate [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	2,214
Commercial Real Estate [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 12,422	$ 35,968
Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	123	27
Pre-modification Recorded Investment	$ 39,583	$ 10,178
post modification recorded investment	39,674	12,224
Residential [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	38,557	3,247
Residential [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 1,117	$ 8,977
Home Equity Lines and Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	26	6
Pre-modification Recorded Investment	$ 1,715	$ 738
post modification recorded investment	1,660	746
Home Equity Lines and Loans [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	1,486	412
Home Equity Lines and Loans [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 174	$ 334
Recreational Finance [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	72	3
Pre-modification Recorded Investment	$ 2,212	$ 90
post modification recorded investment	2,212	90
Recreational Finance [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 2,212	$ 90
Automobile [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	276	9
Pre-modification Recorded Investment	$ 4,969	$ 182
post modification recorded investment	4,969	182
Automobile [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	4,955	$ 182
Automobile [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 14
Other [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	222
Pre-modification Recorded Investment	$ 1,434
post modification recorded investment	1,434
Other [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 1,434
Residential Limited Documentation [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	10	9
Pre-modification Recorded Investment	$ 1,116	$ 2,980
post modification recorded investment	1,059	3,899
Residential Limited Documentation [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment	$ 1,059	2,667
Residential Limited Documentation [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
post modification recorded investment		$ 1,232

XML

Borrowings - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Mar. 01, 2021	Mar. 31, 2021	Jan. 25, 2021
Debt Instrument [Line Items]
Junior subordinated debentures		$ 529
Debt Maturity, Start Year		Jan. 01, 2027
Debt Maturity, End Year		Dec. 31, 2033
M&T Bank Corporation [Member]
Debt Instrument [Line Items]
Variable rates senior notes amount			$ 350
Redeemed subordinated notes	$ 500
Maturity Date	Dec. 01, 2021

XML

Revenue from Contracts with Customers - Additional Information (Detail1)	Mar. 31, 2021
Maximum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Disaggregation Of Revenue [Line Items]
Period of satisfaction of contract with customer	1 year

XML

Revenue from Contracts with Customers - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Uncollected amounts receivable	$ 61	$ 67
Accrued interest and other liabilities [Member]
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 41	$ 42

XML

Revenue from Contracts with Customers - Summary of Sources of Noninterest Income that are Subject to Noted Accounting Guidance (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Brokerage services income	$ 13,113	$ 13,129
Other revenues from operations:
Total other income	505,598	529,360
Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	92,777	106,161
Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	156,022	148,751
ASU 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Brokerage services income	13,113	13,129
Other revenues from operations:
Merchant discount and credit card fees	24,363	27,167
Other	22,910	23,306
Total other income	309,185	318,514
ASU 2014-09 [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	92,777	106,161
ASU 2014-09 [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	156,022	148,751
ASU 2014-09 [Member] | Business Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	9,481	10,331
Total other income	21,978	25,593
ASU 2014-09 [Member] | Business Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	12,497	15,250
ASU 2014-09 [Member] | Business Banking [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer		12
ASU 2014-09 [Member] | Commercial Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	10,407	13,316
Other	958	2,186
Total other income	35,660	39,963
ASU 2014-09 [Member] | Commercial Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	24,295	24,157
ASU 2014-09 [Member] | Commercial Banking [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer		304
ASU 2014-09 [Member] | Commercial Real Estate [Member]
Other revenues from operations:
Merchant discount and credit card fees	445	849
Other	1,091	843
Total other income	4,429	4,504
ASU 2014-09 [Member] | Commercial Real Estate [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	2,893	2,812
ASU 2014-09 [Member] | Discretionary Portfolio [Member]
Other revenues from operations:
Other	384	857
Total other income	384	857
ASU 2014-09 [Member] | Residential Mortgage Banking [Member]
Other revenues from operations:
Other	1,722	922
Total other income	1,722	922
ASU 2014-09 [Member] | Retail Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	3,921	2,271
Other	5,807	5,982
Total other income	61,180	69,923
ASU 2014-09 [Member] | Retail Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	51,452	61,670
ASU 2014-09 [Member] | All Other [Member]
Disaggregation Of Revenue [Line Items]
Brokerage services income	13,113	13,129
Other revenues from operations:
Merchant discount and credit card fees	109	400
Other	12,948	12,516
Total other income	183,832	176,752
ASU 2014-09 [Member] | All Other [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	1,640	2,272
ASU 2014-09 [Member] | All Other [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	$ 156,022	$ 148,435

XML

Pension Plans and Other Postretirement Benefits - Net Periodic Defined Benefit Cost for Defined Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5,023	$ 4,714
Interest cost on projected benefit obligation	15,434	17,886
Expected return on plan assets	(35,950)	(31,475)
Amortization of prior service cost (credit)	125	125
Amortization of net actuarial loss (gain)	22,150	13,950
Net periodic cost (benefit)	6,782	5,200
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	248	223
Interest cost on projected benefit obligation	327	419
Amortization of prior service cost (credit)	(1,175)	(1,175)
Amortization of net actuarial loss (gain)	(300)	(300)
Net periodic cost (benefit)	$ (900)	$ (833)

XML

Pension Plans and Other Postretirement Benefits - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Compensation And Retirement Disclosure [Abstract]
Defined contribution pension and retirement savings plans total expense	$ 33	$ 27

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Earnings Per Common Share - Computations of Basic Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income available to common shareholders:
Net income	$ 447,249	$ 268,822
Less: Preferred stock dividends	(17,050)	(17,078)
Net income available to common equity	430,199	251,744
Less: Income attributable to unvested stock-based compensation awards	(2,108)	(1,043)
Net income available to common shareholders	$ 428,091	$ 250,701
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards	129,414	130,440
Less: Unvested stock-based compensation awards	(877)	(744)
Weighted-average shares outstanding	128,537	129,696
Basic earnings per common share	$ 3.33	$ 1.93

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Earnings Per Common Share - Computations of Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income available to common equity	$ 430,199	$ 251,744
Less: Income attributable to unvested stock-based compensation awards	(2,106)	(1,043)
Net income available to common shareholders	$ 428,093	$ 250,701
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards	129,414	130,440
Less: Unvested stock-based compensation awards	(877)	(744)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and warrants to purchase common stock	132	59
Adjusted weighted-average shares outstanding	128,669	129,755
Diluted earnings per common share	$ 3.33	$ 1.93

XML

Earnings Per Common Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share	462,342	464,694

XML

Comprehensive Income - Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax	$ (85,143)	$ (279,959)
Unrealized holding gains (losses), net, before tax	(32,025)	131,423
Foreign currency translation adjustment, before tax	684	(3,225)
Unrealized gains (losses) on cash flow hedges, before tax	(9,498)	456,333
Total other comprehensive income (loss) before reclassifications, before tax	(40,839)	584,531
Amortization of unrealized holding losses on held-to-maturity ("HTM") securities, before tax	990	772
Gains (Loss) realized in net income	(3)
Accretion of net gain (losses) on terminated cash flow hedges, before tax	(30)	(34)
Net yield adjustment from cash flow hedges currently in effect, before tax	(82,044)	(32,041)
Amortization of prior service credit, before tax	(1,050)	(1,050)
Amortization of actuarial losses, before tax	21,850	13,650
Total other comprehensive income (loss), before tax	(101,126)	565,828
Ending balance, before tax	(186,269)	285,869
Beginning balance, tax	22,111	73,279
Unrealized holding gains (losses), net, tax	8,907	(34,544)
Foreign currency translation adjustment, tax	(136)	282
Unrealized losses on cash flow hedges, tax	2,571	(119,970)
Total other comprehensive income (loss), tax	11,342	(154,232)
Amortization of unrealized holding losses on held-to-maturity ('HTM') securities, tax	(276)	(203)
Gains realized in net income, tax	1
Accretion of net gain on terminated cash flow hedges, tax	9	9
Net yield adjustment from cash flow hedges currently in effect, tax	22,215	8,423
Amortization of prior service credit, tax	384	276
Amortization of actuarial losses, tax	(7,995)	(3,588)
Total other comprehensive income (loss), tax	25,680	(149,315)
Ending balance, tax	47,791	(76,036)
Beginning balance, net of tax	(63,032)	(206,680)
Unrealized holding gains (losses), net of tax	(23,118)	96,879
Foreign currency translation adjustments	548	(2,943)
Unrealized gains (losses) on cash flow hedges, net of tax	(6,927)	336,363
Total other comprehensive income (loss) before reclassifications, net of tax	(29,497)	430,299
Amortization of unrealized holding losses on held-to-maturity ('HTM') securities, net of tax	714	569
Gains realized in net income, net of tax	(2)
Accretion of net gain on terminated cash flow hedges, net of tax	(21)	(25)
Net yield adjustment from cash flow hedges currently in effect, net of tax	(59,829)	(23,618)
Amortization of prior service credit, net of tax	(666)	(774)
Amortization of actuarial losses, net of tax	13,855	10,062
Total other comprehensive income (loss)	(75,446)	416,513
Ending balance, net of tax	(138,478)	209,833
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax	195,386	50,701
Unrealized holding gains (losses), net, before tax	(32,025)	131,423
Total other comprehensive income (loss) before reclassifications, before tax	(32,025)	131,423
Amortization of unrealized holding losses on held-to-maturity ("HTM") securities, before tax	990	772
Gains (Loss) realized in net income	(3)
Total other comprehensive income (loss), before tax	(31,038)	132,195
Ending balance, before tax	164,348	182,896
Total other comprehensive income (loss)	(22,406)
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax	(650,087)	(464,548)
Amortization of prior service credit, before tax	(1,050)	(1,050)
Amortization of actuarial losses, before tax	21,850	13,650
Total other comprehensive income (loss), before tax	20,800	12,600
Ending balance, before tax	(629,287)	(451,948)
Total other comprehensive income (loss)	13,189
Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax	369,558	133,888
Foreign currency translation adjustment, before tax	684	(3,225)
Unrealized gains (losses) on cash flow hedges, before tax	(9,498)	456,333
Total other comprehensive income (loss) before reclassifications, before tax	(8,814)	453,108
Accretion of net gain (losses) on terminated cash flow hedges, before tax	(30)	(34)
Net yield adjustment from cash flow hedges currently in effect, before tax	(82,044)	(32,041)
Total other comprehensive income (loss), before tax	(90,888)	421,033
Ending balance, before tax	$ 278,670	$ 554,921

XML

Comprehensive Income - Accumulated Other Comprehensive Income (Loss), Net (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 16,187,283	$ 15,716,649
Net gain (loss) during period	(75,446)	416,513
Ending balance	16,446,508	15,815,794
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	144,602
Net gain (loss) during period	(22,406)
Ending balance	122,196
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(481,064)
Net gain (loss) during period	13,189
Ending balance	(467,875)
Accumulated Other Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	273,430
Net gain (loss) during period	(66,229)
Ending balance	207,201
Accumulated Other Comprehensive Income (Loss), Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(63,032)	(206,680)
Net gain (loss) during period	(75,446)
Ending balance	$ (138,478)	$ 209,833

XML

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative [Line Items]
Notional amounts of derivative contracts entered into for trading account purposes	$ 37,700,000,000		$ 51,050,000,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)		$ 281,000,000
Net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans	55,000,000		64,000,000
Aggregate fair value of derivative financial instruments in a liability position	50,000,000		114,000,000
Aggregate fair value of derivative financial instruments in asset position	4,000,000		3,000,000
Net fair value of derivative financial instruments in a net asset position	4,000,000		3,000,000
Collateral relating to net asset positions	3,000,000		3,000,000
Counterparties [Member]
Derivative [Line Items]
Post collateral requirements relating to positions	50,000,000		103,000,000
Clearinghouse Credit Facilities [Member]
Derivative [Line Items]
Amount of initial margin posted	150,000,000		135,000,000
Interest Income [Member]
Derivative [Line Items]
Cash flow hedges drerivative instruments income		82,000,000	32,000,000
Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Increase decrease in net interest income due to interest rate swap agreements	91,000,000	$ 36,000,000
Interest Rate Swap Agreements [Member] | Maturity Period 2021 [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	74,000,000
Interest Rate Swap Agreements [Member] | Maturity Period 2022 [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	165,000,000
Interest Rate Swap Agreements [Member] | Maturity Period 2023 [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	42,000,000
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amounts of derivative contracts entered into for trading account purposes	36,200,000,000		37,800,000,000
Foreign Currency and Other Option and Futures Contracts [Member]
Derivative [Line Items]
Notional amounts of derivative contracts entered into for trading account purposes	$ 910,000,000		$ 776,000,000,000

XML

Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Notional Amount	$ 37,700,000,000	$ 51,050,000,000
Average Maturity (in years)	1 year	1 year
Estimated Fair Value Gain (Loss)	$ (3,194,000)	$ 1,076,000
Interest Payments On Variable Rate Commercial Real Estate Loans [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Notional Amount	$ 36,050,000,000	$ 49,400,000,000
Average Maturity (in years)	10 months 24 days	10 months 24 days
Weighted-Average Rate, Fixed	1.80%	2.22%
Weighted-Average Rate, Variable	0.11%	0.15%
Estimated Fair Value Gain (Loss)	$ (2,077,000)	$ 425,000
Fixed Rate Long-Term Borrowings [Member] | Fair Value Hedges [Member]
Derivative [Line Items]
Notional Amount	$ 1,650,000,000	$ 1,650,000,000
Average Maturity (in years)	3 years 1 month 6 days	3 years 3 months 18 days
Weighted-Average Rate, Fixed	2.86%	2.86%
Weighted-Average Rate, Variable	0.75%	0.79%
Estimated Fair Value Gain (Loss)	$ (1,117,000)	$ 651,000

XML

Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Parenthetical) (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Notional Amount	$ 37,700,000,000	$ 51,050,000,000
Forward-Starting Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional Amount	18,700,000,000	32,100,000,000
Fair Value Hedges [Member]
Derivative [Line Items]
Reduction of estimated fair value losses on hedging instruments	70,600,000	101,500,000
Cash Flow Hedges [Member]
Derivative [Line Items]
Reduction of estimated fair value losses on hedging instruments	$ 283,100,000	$ 372,200,000

XML

Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 703,786	$ 1,067,985
Liability Derivatives, Fair Value	113,520	140,485
Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	697,344	1,064,529
Liability Derivatives, Fair Value	110,008	131,135
Fair Value Hedges [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	6,442	3,456
Liability Derivatives, Fair Value	3,512	9,350
Interest Rate Swap Agreements [Member] | Fair Value Hedges [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	172	1,968
Liability Derivatives, Fair Value	3,366	892
Commitments to Sell Real Estate Loans [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	36,179	2,409
Liability Derivatives, Fair Value	5,605	13,868
Commitments to Sell Real Estate Loans [Member] | Fair Value Hedges [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	6,270	1,488
Liability Derivatives, Fair Value	146	8,458
Mortgage-Related Commitments to Originate Real Estate Loans for Sale [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	22,921	43,599
Liability Derivatives, Fair Value	9,164	365
Interest Rate Contracts [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	629,458	1,008,913
Liability Derivatives, Fair Value	84,567	105,768
Foreign Exchange and Other Option and Futures Contracts [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	8,786	9,608
Liability Derivatives, Fair Value	$ 10,672	$ 11,134

XML

Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Offsetting [Abstract]
Reduction in estimated fair value of interest rate contracts in asset position	$ (54.6)	$ (5.6)
Reduction in estimated fair value of interest rate contracts in liability position	$ (502.0)	$ (806.5)

XML

Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Statement of Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging instruments, Derivatives	$ (1,626)	$ 17,138
Interest Rate Swap Agreements [Member] | Fixed Rate Long-Term Borrowings [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives in fair value hedging relationships, Derivatives	(32,658)	88,710
Derivatives in fair value hedging relationships, Hedged item	31,898	(87,824)
Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging instruments, Derivatives	(3,234)	12,786
Foreign Exchange and Other Option and Futures Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging instruments, Derivatives	$ 1,608	$ 4,352

XML

Derivative Financial Instruments - Information about Hedged Items Included in Consolidated Balance Sheet (Detail) - Term Loans [Member] - Derivatives Designated and Qualifying as Hedging Instruments [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Carrying Amount [Member]
Derivatives, Fair Value [Line Items]
Hedged Item	$ 1,718,238	$ 1,750,048
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member]
Derivatives, Fair Value [Line Items]
Hedged Item	$ 69,428	$ 101,326

XML

Variable Interest Entities and Asset Securitizations - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Loss on securitization of assets	$ 0
Other assets for its "investment" in the common securities recognized by the company of various trusts	23,000,000		$ 23,000,000
Total assets of partnerships in which the company invested	150,481,060,000		142,601,105,000
Investment in partnership carrying amount	853,000,000		861,000,000
Unfunded commitments includes carrrying amount of its investments	361,000,000		406,000,000
Maximum exposure to loss of investments in real estate partnerships	1,100,000,000
Investments amortized to income tax expense	19,000,000	$ 21,000,000
Federal tax credits and other federal tax benefits recognized	21,000,000	$ 26,000,000
Variable Interest Entity Primary Beneficiary [Member]
Total assets of partnerships in which the company invested	$ 2,300,000,000		$ 2,300,000,000

XML

Fair Value Measurements - Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	$ 4,364,437	$ 4,822,606
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	49,115	50,060
Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	638,244	1,018,521
Trading account liabilities	95,239	116,902
U.S. Treasury and Federal Agencies [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	7,013	9,338
Government Issued or Guaranteed [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	4,225,089	4,683,438
Other Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	132,319	129,814
Fair Value Measurements, Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	687,359	1,068,581
Investment securities	4,364,437	4,822,606
Equity securities	81,792	92,985
Real estate loans held for sale	871,026	1,054,676
Other assets	65,542	49,464
Total assets	6,070,156	7,088,312
Trading account liabilities	95,239	116,902
Other liabilities	18,281	23,583
Total liabilities	113,520	140,485
Fair Value Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	49,115	50,060
Equity securities	64,150	63,129
Total assets	113,265	113,189
Fair Value Measurements, Recurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	638,244	1,018,521
Investment securities	4,364,421	4,822,590
Equity securities	17,642	29,856
Real estate loans held for sale	871,026	1,054,676
Other assets	42,621	5,865
Total assets	5,933,954	6,931,508
Trading account liabilities	95,239	116,902
Other liabilities	9,117	23,218
Total liabilities	104,356	140,120
Fair Value Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	16	16
Other assets	22,921	43,599
Total assets	22,937	43,615
Other liabilities	9,164	365
Total liabilities	9,164	365
Fair Value Measurements, Recurring [Member] | U.S. Treasury and Federal Agencies [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	7,013	9,338
Fair Value Measurements, Recurring [Member] | U.S. Treasury and Federal Agencies [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	7,013	9,338
Fair Value Measurements, Recurring [Member] | Government Issued or Guaranteed [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	4,225,089	4,683,438
Fair Value Measurements, Recurring [Member] | Government Issued or Guaranteed [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	4,225,089	4,683,438
Fair Value Measurements, Recurring [Member] | Privately Issued Mortgage-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	16	16
Fair Value Measurements, Recurring [Member] | Privately Issued Mortgage-Backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	16	16
Fair Value Measurements, Recurring [Member] | Other Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	132,319	129,814
Fair Value Measurements, Recurring [Member] | Other Debt Securities [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	$ 132,319	$ 129,814

XML

Fair Value Measurements - Changes in Level 3 Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis (Detail) - Fair Value Measurements, Recurring [Member] - Significant Unobservable Inputs (Level 3) [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Privately Issued Mortgage-Backed Securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance		$ 16	$ 16
Total gains realized/unrealized:
Ending Balance		16	16
Other Assets and Other Liabilities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance		43,234	10,740
Total gains realized/unrealized:
Included in earnings	[1]	6,025	44,081
Transfers out of Level 3	[2]	(35,502)	(19,794)
Ending Balance		13,757	35,027
Changes in unrealized gains included in earnings related to assets still held at end of period	[1]	$ 5,300	$ 32,584

[1] Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations

[2] Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Measurement Input [Extensible List]	us-gaap:MeasurementInputComparabilityAdjustmentMember
Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rates for fair value estimations	15.00%
Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rates for fair value estimations	90.00%
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Change in fair value of nonrecurring fair value measured loans for charge-offs and impairment reserves	$ 66	$ 21
Significant Unobservable Inputs (Level 3) [Member] | Residential Mortgage Loans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Capitalized servicing rights	156		$ 159
Capitalized servicing rights, valuation allowance	21		$ 30
Changes in fair value recognized for impairment of capitalized servicing rights		10
Valuation Charge Recognized	$ 9
Weighted-average prepayment speeds	15.22%		16.01%
Discounted rate represented weighted-average option-adjusted basis spread point percentage	900.00%		900.00%
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	$ 658	196	$ 652
Assets taken in foreclosure of defaulted loans measured at fair value on a nonrecurring basis	9	14
Fair Value, Measurements, Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	357	116	339
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	$ 301	$ 80	$ 313

XML

Fair Value Measurements - Quantitative Information Related to Significant Unobservable Inputs (Detail) - Fair Value Measurements, Recurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Discounted Cash Flows | Other Assets and Other Liabilities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Recurring fair value measurements for certain Level 3 Assets and Liabilities	$ 13,757	$ 43,234
Discounted Cash Flows | Other Assets and Other Liabilities [Member] | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Commitment expirations	0.00%	0.00%
Discounted Cash Flows | Other Assets and Other Liabilities [Member] | Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Commitment expirations	98.00%	98.00%
Discounted Cash Flows | Other Assets and Other Liabilities [Member] | Weighted Average [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Commitment expirations	18.00%	16.00%
Two Independent Pricing Quotes [Member] | Privately Issued Mortgage-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Recurring fair value measurements for certain Level 3 Assets and Liabilities	$ 16	$ 16

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Fair Value Measurements - Carrying Amounts and Estimated Fair Value for Financial Instrument Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Financial assets:
Interest-bearing deposits at banks	$ 31,407,227	$ 23,663,810
Investment securities	6,610,667	7,045,697
Federal funds sold	1,000
Loans and leases:
Allowance for credit losses	(1,636,206)	(1,736,387)	$ (1,384,366)	$ (1,051,071)
Loans and leases, net	97,662,874	96,799,480
Financial liabilities:
Noninterest-bearing deposits	(53,641,419)	(47,572,884)
Savings and interest-checking deposits	(70,679,036)	(67,680,840)
Time deposits	(3,514,219)	(3,899,910)
Deposits at Cayman Islands office	(641,691)	(652,104)
Long-term borrowings	(3,498,503)	(4,382,193)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Cash and cash equivalents	1,213,877	1,497,457
Trading account assets	49,115	50,060
Investment securities	64,150	63,129
Significant Observable Inputs (Level 2) [Member]
Financial assets:
Cash and cash equivalents	45,112	55,286
Interest-bearing deposits at banks	31,407,227	23,663,810
Trading account assets	638,244	1,018,521
Investment securities	6,551,036	7,005,571
Federal funds sold	1,000
Loans and leases:
Loans and leases, net	4,113,977	4,413,566
Accrued interest receivable	440,658	419,936
Financial liabilities:
Noninterest-bearing deposits	(53,641,419)	(47,572,884)
Savings and interest-checking deposits	(70,679,036)	(67,680,840)
Time deposits	(3,526,947)	(3,919,367)
Deposits at Cayman Islands office	(641,691)	(652,104)
Short-term borrowings	(58,957)	(59,482)
Long-term borrowings	(3,609,625)	(4,490,433)
Accrued interest payable	(43,745)	(59,916)
Trading account liabilities	(95,239)	(116,902)
Other financial instruments:
Commitments to sell real estate loans	36,698	(18,429)
Interest rate swap agreements used for interest rate risk management	(3,194)	1,076
Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Investment securities	67,556	70,289
Loans and leases:
Consumer loans	16,781,406	16,554,050
Loans and leases, net	94,339,767	93,266,904
Other financial instruments:
Commitments to originate real estate loans for sale	13,757	43,234
Other credit-related commitments	(134,928)	(133,354)
Commercial Loans And Leases [Member] | Significant Unobservable Inputs (Level 3) [Member]
Loans and leases:
Commercial loans and leases	27,509,182	27,220,699
Commercial [Member] | Significant Observable Inputs (Level 2) [Member]
Loans and leases:
Commercial loans and leases	98,513	277,911
Commercial [Member] | Significant Unobservable Inputs (Level 3) [Member]
Loans and leases:
Commercial loans and leases	36,563,245	36,538,669
Residential Real Estate Loans [Member] | Significant Observable Inputs (Level 2) [Member]
Loans and leases:
Commercial loans and leases	4,015,464	4,135,655
Residential Real Estate Loans [Member] | Significant Unobservable Inputs (Level 3) [Member]
Loans and leases:
Commercial loans and leases	13,485,934	12,953,486
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	1,258,989	1,552,743
Interest-bearing deposits at banks	31,407,227	23,663,810
Trading account assets	687,359	1,068,581
Investment securities	6,610,667	7,045,697
Federal funds sold	1,000
Loans and leases:
Consumer loans	16,712,233	16,570,421
Allowance for credit losses	(1,636,206)	(1,736,387)
Loans and leases, net	97,662,874	96,799,480
Accrued interest receivable	440,658	419,936
Financial liabilities:
Noninterest-bearing deposits	(53,641,419)	(47,572,884)
Savings and interest-checking deposits	(70,679,036)	(67,680,840)
Time deposits	(3,514,219)	(3,899,910)
Deposits at Cayman Islands office	(641,691)	(652,104)
Short-term borrowings	(58,957)	(59,482)
Long-term borrowings	(3,498,503)	(4,382,193)
Accrued interest payable	(43,745)	(59,916)
Trading account liabilities	(95,239)	(116,902)
Other financial instruments:
Commitments to originate real estate loans for sale	13,757	43,234
Commitments to sell real estate loans	36,698	(18,429)
Other credit-related commitments	(134,928)	(133,354)
Interest rate swap agreements used for interest rate risk management	(3,194)	1,076
Carrying Amount [Member] | Commercial Loans And Leases [Member]
Loans and leases:
Commercial loans and leases	27,811,190	27,574,564
Carrying Amount [Member] | Commercial [Member]
Loans and leases:
Commercial loans and leases	37,425,974	37,637,889
Carrying Amount [Member] | Residential Real Estate Loans [Member]
Loans and leases:
Commercial loans and leases	17,349,683	16,752,993
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	1,258,989	1,552,743
Interest-bearing deposits at banks	31,407,227	23,663,810
Trading account assets	687,359	1,068,581
Investment securities	6,682,742	7,138,989
Federal funds sold	1,000
Loans and leases:
Consumer loans	16,781,406	16,554,050
Loans and leases, net	98,453,744	97,680,470
Accrued interest receivable	440,658	419,936
Financial liabilities:
Noninterest-bearing deposits	(53,641,419)	(47,572,884)
Savings and interest-checking deposits	(70,679,036)	(67,680,840)
Time deposits	(3,526,947)	(3,919,367)
Deposits at Cayman Islands office	(641,691)	(652,104)
Short-term borrowings	(58,957)	(59,482)
Long-term borrowings	(3,609,625)	(4,490,433)
Accrued interest payable	(43,745)	(59,916)
Trading account liabilities	(95,239)	(116,902)
Other financial instruments:
Commitments to originate real estate loans for sale	13,757	43,234
Commitments to sell real estate loans	36,698	(18,429)
Other credit-related commitments	(134,928)	(133,354)
Interest rate swap agreements used for interest rate risk management	(3,194)	1,076
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member] | Commercial Loans And Leases [Member]
Loans and leases:
Commercial loans and leases	27,509,182	27,220,699
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member] | Commercial [Member]
Loans and leases:
Commercial loans and leases	36,661,758	36,816,580
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member] | Residential Real Estate Loans [Member]
Loans and leases:
Commercial loans and leases	$ 17,501,398	$ 17,089,141

XML

Commitments and Contingencies - Commitments and Contingent Liabilities Outstanding (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Commitments to extend credit
Home equity lines of credit	$ 5,626,965	$ 5,563,854
Commercial real estate loans to be sold	249,514	363,735
Other commercial real estate	6,426,199	7,237,367
Residential real estate loans to be sold	1,081,889	1,026,118
Other residential real estate	600,212	665,259
Commercial and other	20,140,102	19,427,886
Standby letters of credit	2,231,893	2,241,417
Commercial letters of credit	13,260	27,332
Financial guarantees and indemnification contracts	4,365,308	4,220,531
Commitments to sell real estate loans	$ 1,881,140	$ 2,108,823

XML

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Commitments to extend credit to commercial customers	$ 10,500,000,000	$ 10,400,000,000
Maximum credit risk for recourse associated with loans sold under Federal National Mortgage Association Delegated Underwriting and Servicing program	4,000,000,000.0	$ 4,000,000,000.0
Minimum [Member]
Loss Contingencies [Line Items]
Range of reasonably possible losses	0
Maximum [Member]
Loss Contingencies [Line Items]
Range of reasonably possible losses	$ 25,000,000

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Segment Information - Information about Company's Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net income	$ 447,249	$ 268,822
Net Income (Loss)	447,249	268,822
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	1,486,993	1,506,165
Business Banking [Member]
Segment Reporting Information [Line Items]
Net income	46,271	32,926
Net Income (Loss)	46,271	32,926
Business Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	155,903	137,833
Business Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	669	885
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net income	122,638	143,732
Net Income (Loss)	122,638	143,732
Commercial Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	285,912	291,776
Commercial Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	809	1,053
Commercial Real Estate [Member]
Segment Reporting Information [Line Items]
Net income	71,272	117,408
Net Income (Loss)	71,272	117,408
Commercial Real Estate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	200,843	223,305
Commercial Real Estate [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	222	409
Discretionary Portfolio [Member]
Segment Reporting Information [Line Items]
Net income	90,546	25,668
Net Income (Loss)	90,546	25,668
Discretionary Portfolio [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	134,544	49,219
Discretionary Portfolio [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	(10,027)	(13,037)
Residential Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Net income	49,611	24,616
Net Income (Loss)	49,611	24,616
Residential Mortgage Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	153,760	125,561
Residential Mortgage Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	22,183	21,417
Retail Banking [Member]
Segment Reporting Information [Line Items]
Net income	85,358	110,246
Net Income (Loss)	85,358	110,246
Retail Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	346,917	402,683
Retail Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	272	267
All Other [Member]
Segment Reporting Information [Line Items]
Net income	(18,447)	(185,774)
Net Income (Loss)	(18,447)	(185,774)
All Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	209,114	275,788
All Other [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	$ (14,128)	$ (10,994)

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Segment Information - Summary of Segment Information (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Segment Reporting Information [Line Items]
Average Total Assets	$ 148,157	$ 135,480	$ 120,585
Business Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	8,622	8,152	6,006
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	30,395	30,338	29,172
Commercial Real Estate [Member]
Segment Reporting Information [Line Items]
Average Total Assets	26,097	25,792	24,849
Discretionary Portfolio [Member]
Segment Reporting Information [Line Items]
Average Total Assets	23,650	27,726	27,143
Residential Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	6,506	4,038	3,218
Retail Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	17,216	16,438	16,002
All Other [Member]
Segment Reporting Information [Line Items]
Average Total Assets	$ 35,671	$ 22,996	$ 14,195

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Segment Information - Summary of Segment Information (Parenthetical) (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting [Abstract]
Taxable-equivalent adjustment	$ 3,733,000	$ 5,063,000

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Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Loan facility carrying amount	$ 3,498,503,000		$ 4,382,193,000
Bayview Lending Group [Member]
Schedule of Equity Method Investments [Line Items]
Carrying value of minority interest investment in Bayview Lending Group LLC	$ 0
Minority interest in Bayview Lending Group LLC	20.00%
Bayview Lending Group [Member] | Other Revenues From Operations [Member]
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	$ 0	$ 23,000,000
Bayview Lending Group and Bayview Financial [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding principal balances of mortgage servicing rights	1,900,000,000		1,900,000,000
Revenue from contract with customer	2,000,000	3,000,000
Bayview Financial [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding principal balances of residential mortgage loans from Bayview Financial	69,700,000,000		68,100,000,000
Revenues from sub-servicing	34,000,000	$ 37,000,000
Investment securities in held-to-maturity portfolio securitized by Bayview Financial	73,000,000		$ 77,000,000
Bayview Financial [Member] | FHA Guaranteed Mortgage Loans [Member]
Schedule of Equity Method Investments [Line Items]
FHA guaranteed purchase amount of delinquent loan	1,000,000,000.0
FHA guaranteed mortgage loan	965,000,000
Bayview Financial [Member] | Syndicated Loan Facility [Member]
Schedule of Equity Method Investments [Line Items]
Loan facility carrying amount	1,100,000,000
Bayview Financial [Member] | Syndicated Loan Facility [Member] | M&T Bank [Member]
Schedule of Equity Method Investments [Line Items]
Loan facility carrying amount	$ 139,000,000