Commerce Bancshares (CBSH) 10-Q 5 Aug 21 2021 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2021	Aug. 03, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-36502
Entity Registrant Name	COMMERCE BANCSHARES, INC.
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	43-0889454
Entity Address, Address Line One	1000 Walnut
Entity Address, City or Town	Kansas City,
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	64106
City Area Code	816
Local Phone Number	234-2000
Title of 12(b) Security	$5 Par Value Common Stock
Trading Symbol	CBSH
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		116,804,211
Entity Central Index Key	0000022356
Document Fiscal Year Focus	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Loans	$ 15,640,264	$ 16,329,641
Financing Receivable, Allowance for Credit Loss	(172,395)	(220,834)
Net loans	15,467,869	16,108,807
Loans held for sale	23,697	45,089
Investment securities:
Available for sale debt securities	13,291,506	12,449,264
Trading	29,002	35,321
Equity Securities	8,678	4,363
Other securities	176,439	156,745
Total investment securities	13,505,625	12,645,693
Federal Funds Sold and Securities Purchased under Agreements to Resell	5,945	0
Long Term Securities Purchased Under Agreements To Resell	1,300,000	850,000
Interest earning deposits with banks	2,161,644	1,747,363
Cash and due from banks	358,122	437,563
Premises and equipment, net	371,989	371,083
Goodwill	138,921	138,921
Other intangible assets, net	14,148	11,207
Other assets	508,202	567,248
Total assets	33,856,162	32,922,974
Deposits:
Non-interest bearing	11,085,286	10,497,598
Savings, interest checking and money market	14,654,696	14,604,456
Certificates of deposit of less than $100,000	478,838	529,802
Certificates of deposit of $100,000 and over	1,267,417	1,314,889
Total deposits	27,486,237	26,946,745
Federal funds purchased and securities sold under agreements to repurchase	2,318,228	2,098,383
Other borrowings	2,194	802
Other liabilities	555,673	477,072
Total liabilities	30,362,332	29,523,002
Commerce Bancshares, Inc. stockholders' equity:
Common stock	589,352	589,352
Capital surplus	2,424,157	2,436,288
Retained earnings	304,739	73,000
Treasury stock, at cost	(53,018)	(32,970)
Accumulated Other Comprehensive Income (Loss)	220,390	331,377
Total Commerce Bancshares, Inc. stockholders' equity	3,485,620	3,397,047
Non-controlling interest	8,210	2,925
Total equity	3,493,830	3,399,972
Total liabilities and equity	$ 33,856,162	$ 32,922,974

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Mortgages Held-for-sale, Fair Value Disclosure	$ 17,374,000	$ 39,396,000
Debt Securities, Available-for-sale, Amortized Cost	13,077,042,000	12,097,533,000
Allowance for Credit Losses	$ 0	$ 0
Common stock, par value	$ 5	$ 5
Common Stock, Shares Authorized	140,000,000	140,000,000
Common stock, shares issued	117,870,372	117,870,372
Treasury stock, shares	742,784	497,413

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
INTEREST INCOME
Interest and fees on loans	$ 144,584	$ 151,545	$ 290,922		$ 310,692
Interest and fees on loans held for sale	245	127	549		324
Interest on investment securities	55,143	50,472	106,700		103,857
Interest on federal funds sold and short-term securities purchased under agreements to resell	2	0	2		2
Interest on Long-Term Securities Purchased Under Agreements To Resell	10,416	10,736	21,544		18,198
Interest on deposits with banks	743	443	1,113		1,735
Total interest income	211,133	213,323	420,830		434,808
INTEREST EXPENSE
Savings, interest checking and money market	1,844	3,977	3,947		12,286
Certificates of deposit of less than $100,000	327	1,393	800		3,168
Certificates of deposit of $100,000 and over	661	3,610	1,723		8,845
Interest on federal funds purchased and securities sold under agreements to repurchase	320	585	632		5,355
Interest on other borrowings	(1)	701	(2)		1,032
Total interest expense	3,151	10,266	7,100		30,686
Net interest income	207,982	203,057	413,730		404,122
Provision for credit losses	(45,655)	80,539	(51,887)		138,492
Net interest income after credit losses	253,637	122,518	465,617		265,630
NON-INTEREST INCOME
Bank card transaction fees	42,608	33,745	80,303		73,945
Trust fees	46,257	37,942	90,384		77,907
Deposit account charges and other fees	23,988	22,279	46,563		45,956
Capital market fees	3,327	3,772	8,308		7,562
Consumer brokerage services	4,503	3,011	8,584		7,088
Loan fees and sales	7,446	4,649	17,630		7,884
Other	11,014	12,117	23,416		20,836
Total non-interest income	139,143	117,515	275,188		241,178
INVESTMENT SECURITIES GAINS (LOSSES), NET
INVESTMENT SECURITIES GAINS (LOSSES), NET	16,804	(4,129)	26,657	[1]	(17,430)	[1]
NON-INTEREST EXPENSE
Salaries and employee benefits	130,751	126,759	259,784		255,696
Net occupancy	11,527	11,269	23,548		23,017
Equipment	4,605	4,755	8,958		9,576
Supplies and communication	4,033	4,427	8,158		9,085
Data processing and software	24,954	23,837	50,417		47,392
Marketing	5,680	3,801	10,838		9,780
Other	16,576	12,664	28,996		26,664
Total non-interest expense	198,126	187,512	390,699		381,210
Income before income taxes	211,458	48,392	376,763		108,168
Less income taxes	45,209	9,661	77,285		19,834
Net income	166,249	38,731	299,478		88,334
Less non-controlling interest expense (income)	3,923	(1,132)	6,180		(3,386)
Net income attributable to Commerce Bancshares, Inc.	162,326	39,863	293,298		91,720
Preferred Stock Dividends	0	2,250	0		4,500
Net income available to common shareholders	$ 162,326	$ 37,613	$ 293,298		$ 87,220
Net income per common share — basic	$ 1.38	$ 0.32	$ 2.50		$ 0.74
Net income per common share — diluted	$ 1.38	$ 0.32	$ 2.49		$ 0.74
[1]	Available for sale debt securities, equity securities, and other securities.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 166,249	$ 38,731	$ 299,478	$ 88,334
Other comprehensive income (loss)
Net unrealized gains (losses) on available for sale debt securities	55,725	86,462	(102,951)	165,134
Pension loss amortization	438	355	875	711
Unrealized gains (losses) on cash flow hedge derivatives	(4,525)	9,308	(8,911)	72,972
Current period other comprehensive income (loss), net of tax	51,638	96,125	(110,987)	238,817
Comprehensive income	217,887	134,856	188,491	327,151
Less non-controlling interest expense (income)	3,923	(1,132)	6,180	(3,386)
Comprehensive income attributable to Commerce Bancshares, Inc.	$ 213,964	$ 135,988	$ 182,311	$ 330,537

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock [Member]	Preferred Stock [Member]Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock [Member]	Common Stock [Member]Cumulative Effect, Period of Adoption, Adjusted Balance	Capital Surplus [Member]	Capital Surplus [Member]Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock [Member]	Treasury Stock [Member]Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]Cumulative Effect, Period of Adoption, Adjusted Balance	Non-Controlling Interest [Member]	Non-Controlling Interest [Member]Cumulative Effect, Period of Adoption, Adjusted Balance
Balance at Dec. 31, 2019	$ 3,138,472		$ 3,142,238	$ 144,784	$ 144,784	$ 563,978	$ 563,978	$ 2,151,464	$ 2,151,464	$ 201,562		$ 205,328	$ (37,548)	$ (37,548)	$ 110,444	$ 110,444	$ 3,788	$ 3,788
Balance (Accounting Standards Update 2016-13) at Dec. 31, 2019		$ 3,766									$ 3,766
Net income	88,334									91,720							(3,386)
Other comprehensive income (loss)	238,817														238,817
Distributions to non-controlling interest	(100)																(100)
Purchase of treasury stock	(53,593)												(53,593)
Issuance of stock, under purchase and equity compensation plans	(27)							(22,056)					22,029
Stock-based compensation	7,466							7,466
Cash dividends per share, Common Stock, Cash	(60,466)									(60,466)
Dividends per share, Preferred Stock, Cash	(4,500)									(4,500)
Balance at Jun. 30, 2020	3,358,169			144,784		563,978		2,136,874		232,082			(69,112)		349,261		302
Balance at Mar. 31, 2020	3,252,464			144,784		563,978		2,133,623		224,643			(69,149)		253,136		1,449
Net income	38,731									39,863							(1,132)
Other comprehensive income (loss)	96,125														96,125
Distributions to non-controlling interest	(15)																(15)
Purchase of treasury stock	(448)												(448)
Issuance of stock, under purchase and equity compensation plans	(3)							(488)					485
Stock-based compensation	3,739							3,739
Cash dividends per share, Common Stock, Cash	(30,174)									(30,174)
Dividends per share, Preferred Stock, Cash	(2,250)									(2,250)
Balance at Jun. 30, 2020	3,358,169			144,784		563,978		2,136,874		232,082			(69,112)		349,261		302
Balance at Dec. 31, 2020	3,399,972			0		589,352		2,436,288		73,000			(32,970)		331,377		2,925
Net income	299,478									293,298							6,180
Other comprehensive income (loss)	(110,987)														(110,987)
Distributions to non-controlling interest	(895)																(895)
Purchase of treasury stock	(39,887)												(39,887)
Issuance of stock, under purchase and equity compensation plans	(15)							(19,854)					19,839
Stock-based compensation	7,723							7,723
Cash dividends per share, Common Stock, Cash	(61,559)									(61,559)
Balance at Jun. 30, 2021	3,493,830			0		589,352		2,424,157		304,739			(53,018)		220,390		8,210
Balance at Mar. 31, 2021	3,317,385			0		589,352		2,420,393		173,173			(39,080)		168,752		4,795
Net income	166,249									162,326							3,923
Other comprehensive income (loss)	51,638														51,638
Distributions to non-controlling interest	(508)																(508)
Purchase of treasury stock	(13,964)												(13,964)
Issuance of stock, under purchase and equity compensation plans	0							(26)					26
Stock-based compensation	3,790							3,790
Cash dividends per share, Common Stock, Cash	(30,760)									(30,760)
Balance at Jun. 30, 2021	$ 3,493,830			$ 0		$ 589,352		$ 2,424,157		$ 304,739			$ (53,018)		$ 220,390		$ 8,210

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.263	$ 0.257	$ 0.525	$ 0.514
Preferred Stock, Dividends, per share, cash paid	$ 0	$ 0.375	$ 0	$ 0.750

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES:
Net income		$ 299,478	$ 88,334
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		(51,887)	138,492
Provision for depreciation and amortization		22,525	21,320
Amortization of investment security premiums, net		41,270	25,665
Investment securities (gains) losses, net (A)	[1]	(26,657)	17,430
Net gains on sales of loans held for sale		(13,677)	(1,826)
Originations of loans held for sale		(325,714)	(41,167)
Proceeds from sales of loans held for sale		356,559	43,877
Net decrease in trading debt securities		1,287	5,249
Stock-based compensation		7,723	7,466
(Increase) decrease in interest receivable		6,688	(3,672)
Decrease in interest payable		(2,809)	(5,145)
Increase in income taxes payable		19,095	12,842
Other changes, net		(6,632)	(79,137)
Net cash provided by operating activities		327,249	229,728
INVESTING ACTIVITIES:
Proceeds from sales of investment securities (A)	[1]	10,060	174,597
Proceeds from maturities/pay downs of investment securities (A)	[1]	1,789,405	1,224,190
Purchases of investment securities (A)	[1]	(2,707,024)	(2,648,074)
Net (increase) decrease in loans		678,554	(1,676,552)
Long-term securities purchased under agreements to resell		(450,000)	0
Purchases of premises and equipment		(21,944)	(13,677)
Sales of premises and equipment		4,786	21
Net cash used in investing activities		(696,163)	(2,939,495)
FINANCING ACTIVITIES:
Net increase in non-interest bearing, savings, interest checking and money market deposits		685,582	3,824,235
Net increase (decrease) in certificates of deposit		(98,436)	25,701
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase		219,845	(110,334)
Net increase (decrease) in short-term borrowings		1,392	(943)
Purchases of treasury stock		(39,887)	(53,593)
Issuance of stock under equity compensation plans		(15)	(27)
Cash dividends paid on common stock		(61,559)	(60,466)
Cash dividends paid on preferred stock		0	(4,500)
Net cash provided by financing activities		706,922	3,620,073
Increase in cash, cash equivalents and restricted cash		338,008	910,306
Cash, cash equivalents and restricted cash at beginning of year		2,208,328	907,808
Cash, cash equivalents and restricted cash at June 30		2,546,336	1,818,114
Supplemental Cash Flow Information:
Income tax payments, net		55,440	4,833
Interest paid on deposits and borrowings		9,909	35,832
Loans transferred to foreclosed real estate		$ 172	$ 57
[1]	Available for sale debt securities, equity securities, and other securities.

Consolidated Statements Of Ca_2

Consolidated Statements Of Cash Flows Cash Flow Additional Information - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Restricted Cash and Cash Equivalents	$ 20.6	$ 21.9

Principles Of Consolidation And

Principles Of Consolidation And Presentation	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles Of Consolidation And Presentation	Principles of Consolidation and Presentation The accompanying consolidated financial statements include the accounts of Commerce Bancshares, Inc. and all majority-owned subsidiaries (the Company). Most of the Company's operations are conducted by its subsidiary bank, Commerce Bank (the Bank). The consolidated financial statements in this report have not been audited by an independent registered public accounting firm, but in the opinion of management, all adjustments necessary to present fairly the financial position and the results of operations for the interim periods have been made. All such adjustments are of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated. Certain reclassifications were made to 2020 data to conform to current year presentation. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. Management has evaluated subsequent events for potential recognition or disclosure. The results of operations for the three and six month periods ended June 30, 2021 are not necessarily indicative of results to be attained for the full year or any other interim period. The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission. Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the Company's most recent Annual Report on Form 10-K, containing the latest audited consolidated financial statements and notes thereto.

Loans And Allowance For Credit

Loans And Allowance For Credit Losses	6 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Financing Receivables	Loans and Allowance for Credit Losses Major classifications within the Company’s held for investment loan portfolio at June 30, 2021 and December 31, 2020 are as follows: (In thousands) June 30, 2021 December 31, 2020 Commercial: Business $ 5,803,760 $ 6,546,087 Real estate – construction and land 1,103,661 1,021,595 Real estate – business 3,017,560 3,026,117 Personal Banking: Real estate – personal 2,793,213 2,820,030 Consumer 2,049,166 1,950,502 Revolving home equity 283,568 307,083 Consumer credit card 586,358 655,078 Overdrafts 2,978 3,149 Total loans $ 15,640,264 $ 16,329,641 Accrued interest receivable totaled $37.2 million and $41.9 million at June 30, 2021 and December 31, 2020, respectively, and was included within other assets on the consolidated balance sheets. For the three months ended June 30, 2021, the Company wrote-off accrued interest by reversing interest income of $36 thousand and $1.1 million in the Commercial and Personal Banking portfolios, respectively. Similarly, for the six months ended June 30, 2021, the Company wrote-off accrued interest of $161 thousand and $3.1 million in the Commercial and Personal Banking portfolios, respectively. At June 30, 2021, loans of $3.5 billion were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. Additional loans of $1.4 billion were pledged at the Federal Reserve Bank as collateral for discount window borrowings. Allowance for credit losses The allowance for credit losses is measured using an average historical loss model which incorporates relevant information about past events (including historical credit loss experience on loans with similar risk characteristics), current conditions, and reasonable and supportable forecasts that affect the collectability of the remaining cash flows over the contractual term of the loans. The allowance for credit losses is measured on a collective (pool) basis. Loans are aggregated into pools based on similar risk characteristics including borrower type, collateral type and expected credit loss patterns. Loans that do not share similar risk characteristics, primarily large loans on non-accrual status, are evaluated on an individual basis. For loans evaluated for credit losses on a collective basis, average historical loss rates are calculated for each pool using the Company’s historical net charge-offs (combined charge-offs and recoveries by observable historical reporting period) and outstanding loan balances during a lookback period. Lookback periods can be different based on the individual pool and represent management’s credit expectations for the pool of loans over the remaining contractual life. In certain loan pools, if the Company’s own historical loss rate is not reflective of the loss expectations, the historical loss rate is augmented by industry and peer data. The calculated average net charge-off rate is then adjusted for current conditions and reasonable and supportable forecasts. These adjustments increase or decrease the average historical loss rate to reflect expectations of future losses given a single path economic forecast of key macroeconomic variables including GDP, disposable income, unemployment rate, various interest rates, CPI inflation rate, HPI, CREPI and market volatility. The adjustments are based on results from various regression models projecting the impact of the macroeconomic variables to loss rates. The forecast is used for a reasonable and supportable period before reverting back to historical averages using a straight-line method. The forecast adjusted loss rate is applied to the amortized cost of loans over the remaining contractual lives, adjusted for expected prepayments. The contractual term excludes expected extensions (except for contractual extensions at the option of the customer), renewals and modifications unless there is a reasonable expectation that a troubled debt restructuring will be executed. Credit cards and certain similar consumer lines of credit do not have stated maturities and therefore, for these loan classes, remaining contractual lives are determined by estimating future cash flows expected to be received from customers until payments have been fully allocated to outstanding balances. Additionally, the allowance for credit losses considers other qualitative factors not included in historical loss rates or macroeconomic forecast such as changes in portfolio composition, underwriting practices, or significant unique events or conditions. Key model assumptions in the Company’s allowance for credit loss model include the economic forecast, the reasonable and supportable period, prepayment assumptions and qualitative factors applied for portfolio composition changes, underwriting practices, or significant unique events or conditions. The assumptions utilized in estimating the Company’s allowance for credit losses at June 30, 2021 and March 31, 2021 are discussed below. Key Assumption June 30, 2021 March 31, 2021 Overall economic forecast • An optimistic recovery from the Global Coronavirus Recession (GCR) continues • Assumes improving health conditions and expanding vaccine distribution • Further fiscal stimulus assumed • Continued uncertainty regarding the assumptions related to the health crisis • Uncertainty regarding rising inflation • The recovery from the GCR continues • Assumes improving health conditions and expanding vaccine distribution • Considers government stimulus • Continued uncertainty regarding the assumptions related to the health crisis Reasonable and supportable period and related reversion period • One year for commercial and personal banking loans • Reversion to historical average loss rates within two quarters using straight-line method • One year for commercial and personal banking loans • Reversion to historical average loss rates within two quarters using straight-line method Forecasted macro-economic variables • Unemployment rate ranging from 4.6% to 4.0% during the supportable forecast period • Real GDP growth ranging from 10.7% to 1.7% • Prime rate of 3.25% • Unemployment rate ranging from 5.8% to 4.5% during the supportable forecast period • Real GDP growth ranges from 11.1% to 1.0% • Prime rate of 3.25% Prepayment assumptions Commercial loans • 5% for most loan pools Personal banking loans • Ranging from 25.4% to 16.5% for most loan pools • 60.1% for consumer credit cards Commercial loans • 5% for most loan pools Personal banking loans • Ranging from 26.4% to 23.6% for most loan pools • 58.5% for consumer credit cards Qualitative factors Added net reserves using qualitative processes related to: • Loans originated in our expansion markets, loans that are designated as shared national credits, and certain portfolios considered to be COVID-19 impacted • Changes in the composition of the loan portfolios • Loans downgraded to special mention, substandard, or non-accrual status Added net reserves using qualitative processes related to: • Loans originated in our expansion markets, loans that are designated as shared national credits, and certain portfolios considered to be COVID-19 impacted • Changes in the composition of the loan portfolios • Loans downgraded to special mention, substandard, or non-accrual status The liability for unfunded lending commitments utilizes the same model as the allowance for credit losses on loans, however, the liability for unfunded lending commitments incorporates an assumption for the portion of unfunded commitments that are expected to be funded. Sensitivity in the Allowance for Credit Loss model The allowance for credit losses is an estimate that requires significant judgment including projections of the macro-economic environment. The forecasted macro-economic environment continuously changes which can cause fluctuations in estimated expected losses. The current forecast projects a continued recovery of the COVID-19 pandemic induced recession. This pandemic is unprecedented and information that could be used in the estimation of the allowance for credit losses changes frequently. Trends in health conditions and vaccine distribution could significantly modify economic projections used in the estimation of the allowance for credit losses. A summary of the activity in the allowance for credit losses on loans and the liability for unfunded lending commitments during the three and six months ended June 30, 2021 and 2020, respectively, follows: For the Three Months Ended June 30, 2021 For the Six Months Ended June 30, 2021 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total ALLOWANCE FOR CREDIT LOSSES ON LOANS Balance at beginning of period $ 119,623 $ 80,904 $ 200,527 $ 121,549 $ 99,285 $ 220,834 Provision for credit losses on loans (26,579) (854) (27,433) (28,488) (9,300) (37,788) Deductions: Loans charged off 270 8,598 8,868 502 21,307 21,809 Less recoveries on loans 5,264 2,905 8,169 5,479 5,679 11,158 Net loan charge-offs (recoveries) (4,994) 5,693 699 (4,977) 15,628 10,651 Balance June 30, 2021 $ 98,038 $ 74,357 $ 172,395 $ 98,038 $ 74,357 $ 172,395 LIABILITY FOR UNFUNDED LENDING COMMITMENTS Balance at beginning of period $ 41,513 $ 917 $ 42,430 $ 37,259 $ 1,048 $ 38,307 Provision for credit losses on unfunded lending commitments (18,163) (59) (18,222) (13,909) (190) (14,099) Balance June 30, 2021 $ 23,350 $ 858 $ 24,208 $ 23,350 $ 858 $ 24,208 ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS $ 121,388 $ 75,215 $ 196,603 $ 121,388 $ 75,215 $ 196,603 For the Three Months Ended June 30, 2020 For the Six Months Ended June 30, 2020 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total ALLOWANCE FOR CREDIT LOSSES ON LOANS Balance at end of prior period $ 83,551 $ 88,102 $ 171,653 $ 91,760 $ 68,922 $ 160,682 Adoption of ASU 2016-13 — — — (29,711) 8,672 (21,039) Balance at beginning of period $ 83,551 $ 88,102 $ 171,653 $ 62,049 $ 77,594 $ 139,643 Provision for credit losses on loans 50,245 27,246 77,491 71,353 49,006 120,359 Deductions: Loans charged off 3,386 7,859 11,245 3,802 21,835 25,637 Less recoveries on loans 143 2,702 2,845 953 5,426 6,379 Net loan charge-offs 3,243 5,157 8,400 2,849 16,409 19,258 Balance June 30, 2020 $ 130,553 $ 110,191 $ 240,744 $ 130,553 $ 110,191 $ 240,744 LIABILITY FOR UNFUNDED LENDING COMMITMENTS Balance at end of prior period $ 31,061 $ 1,189 $ 32,250 $ 399 $ 676 $ 1,075 Adoption of ASU 2016-13 — — — 16,057 33 16,090 Balance at beginning of period $ 31,061 $ 1,189 $ 32,250 $ 16,456 $ 709 $ 17,165 Provision for credit losses on unfunded lending commitments 2,991 58 3,049 17,596 538 18,134 Balance June 30, 2020 $ 34,052 $ 1,247 $ 35,299 $ 34,052 $ 1,247 $ 35,299 ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS $ 164,605 $ 111,438 $ 276,043 $ 164,605 $ 111,438 $ 276,043 Delinquent and non-accrual loans The Company considers loans past due on the day following the contractual repayment date, if the contractual repayment was not received by the Company as of the end of the business day. The following table provides aging information on the Company’s past due and accruing loans, in addition to the balances of loans on non-accrual status, at June 30, 2021 and December 31, 2020. (In thousands) Current or Less Than 30 Days Past Due 30 – 89 Days Past Due 90 Days Past Due and Still Accruing Non-accrual Total June 30, 2021 Commercial: Business $ 5,777,100 $ 17,547 $ 274 $ 8,839 $ 5,803,760 Real estate – construction and land 1,101,716 1,728 217 — 1,103,661 Real estate – business 3,012,063 3,032 1,810 655 3,017,560 Personal Banking: Real estate – personal 2,783,135 5,683 2,723 1,672 2,793,213 Consumer 2,028,740 18,690 1,736 — 2,049,166 Revolving home equity 281,679 1,115 774 — 283,568 Consumer credit card 577,576 3,978 4,804 — 586,358 Overdrafts 2,786 192 — — 2,978 Total $ 15,564,795 $ 51,965 $ 12,338 $ 11,166 $ 15,640,264 December 31, 2020 Commercial: Business $ 6,517,838 $ 2,252 $ 3,473 $ 22,524 $ 6,546,087 Real estate – construction and land 1,021,592 — 3 — 1,021,595 Real estate – business 3,016,215 7,666 6 2,230 3,026,117 Personal Banking: Real estate – personal 2,808,886 6,521 2,837 1,786 2,820,030 Consumer 1,921,822 25,417 3,263 — 1,950,502 Revolving home equity 305,037 1,656 390 — 307,083 Consumer credit card 635,770 7,090 12,218 — 655,078 Overdrafts 2,896 253 — — 3,149 Total $ 16,230,056 $ 50,855 $ 22,190 $ 26,540 $ 16,329,641 At June 30, 2021, the Company had $8.0 million in non-accrual business loans that had no allowance for credit loss. At December 31, 2020, the Company had $9.4 million in non-accrual business loans that had no allowance for credit loss. The Company did not record any interest income on non-accrual loans during the three and six months ended June 30, 2021 and 2020, respectively. Credit quality indicators The following table provides information about the credit quality of the Commercial loan portfolio. The Company utilizes an internal risk rating system comprised of a series of grades to categorize loans according to perceived risk associated with the expectation of debt repayment based on borrower specific information including but not limited to current financial information, historical payment experience, industry information, collateral levels and collateral types. The “pass” category consists of a range of loan grades that reflect increasing, though still acceptable, risk. A loan is assigned the risk rating at origination and then monitored throughout the contractual term for possible risk rating changes. Movement of risk through the various grade levels in the “pass” category is monitored for early identification of credit deterioration. The “special mention” rating is applied to loans where the borrower exhibits negative financial trends due to borrower specific or systemic conditions that, if left uncorrected, threaten its capacity to meet its debt obligations. The borrower is believed to have sufficient financial flexibility to react to and resolve its negative financial situation. It is a transitional grade that is closely monitored for improvement or deterioration. The “substandard” rating is applied to loans where the borrower exhibits well-defined weaknesses that jeopardize its continued performance and are of a severity that the distinct possibility of default exists. Loans are placed on “non-accrual” when management does not expect to collect payments consistent with acceptable and agreed upon terms of repayment. All loans are analyzed for risk rating updates annually. For larger loans, rating assessments may be more frequent if relevant information is obtained earlier through debt covenant monitoring or overall relationship management. Smaller loans are monitored as identified by the loan officer based on the risk profile of the individual borrower or if the loan becomes past due related to credit issues. Loans rated Special Mention, Substandard or Non-accrual are subject to quarterly review and monitoring processes. In addition to the regular monitoring performed by the lending personnel and credit committees, loans are subject to review by a credit review department which verifies the appropriateness of the risk ratings for the loans chosen as part of its risk-based review plan. The risk category of loans in the Commercial portfolio as of June 30, 2021 and December 31, 2020 are as follows: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total June 30, 2021 Business Risk Rating: Pass $ 977,576 $ 1,388,657 $ 803,333 $ 345,101 $ 216,034 $ 342,506 $ 1,574,367 $ 5,647,574 Special mention 611 568 24,203 14,099 669 6,029 16,815 62,994 Substandard 2,652 10,286 16,848 4,275 1,833 13,078 35,381 84,353 Non-accrual 485 — 1 2,387 110 5,831 25 8,839 Total Business: $ 981,324 $ 1,399,511 $ 844,385 $ 365,862 $ 218,646 $ 367,444 $ 1,626,588 $ 5,803,760 Real estate-construction Risk Rating: Pass $ 231,955 $ 478,413 $ 180,706 $ 54,210 $ 2,723 $ 25,091 $ 25,353 $ 998,451 Special mention 15,469 28,020 — 1,004 19,474 — — 63,967 Substandard 305 12,377 — 15,364 13,197 — — 41,243 Total Real estate-construction: $ 247,729 $ 518,810 $ 180,706 $ 70,578 $ 35,394 $ 25,091 $ 25,353 $ 1,103,661 Real estate-business Risk Rating: Pass $ 318,815 $ 832,940 $ 631,352 $ 266,537 $ 210,149 $ 362,561 $ 60,090 $ 2,682,444 Special mention 2,484 31,269 10,328 23,036 3,354 4,255 74 74,800 Substandard 17,019 63,023 12,027 32,963 77,441 54,132 3,056 259,661 Non-accrual 245 65 87 221 — 37 — 655 Total Real estate-business: $ 338,563 $ 927,297 $ 653,794 $ 322,757 $ 290,944 $ 420,985 $ 63,220 $ 3,017,560 Commercial loans Risk Rating: Pass $ 1,528,346 $ 2,700,010 $ 1,615,391 $ 665,848 $ 428,906 $ 730,158 $ 1,659,810 $ 9,328,469 Special mention 18,564 59,857 34,531 38,139 23,497 10,284 16,889 201,761 Substandard 19,976 85,686 28,875 52,602 92,471 67,210 38,437 385,257 Non-accrual 730 65 88 2,608 110 5,868 25 9,494 Total Commercial loans: $ 1,567,616 $ 2,845,618 $ 1,678,885 $ 759,197 $ 544,984 $ 813,520 $ 1,715,161 $ 9,924,981 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total December 31, 2020 Business Risk Rating: Pass $ 2,472,419 $ 966,068 $ 438,557 $ 329,207 $ 163,357 $ 281,604 $ 1,619,680 $ 6,270,892 Special mention 28,612 26,746 14,102 1,781 5,091 1,664 41,749 119,745 Substandard 17,246 21,985 5,076 2,675 3,578 13,390 68,976 132,926 Non-accrual 12,619 1 5,327 391 502 3,659 25 22,524 Total Business: $ 2,530,896 $ 1,014,800 $ 463,062 $ 334,054 $ 172,528 $ 300,317 $ 1,730,430 $ 6,546,087 Real estate-construction Risk Rating: Pass $ 483,302 $ 330,480 $ 56,747 $ 3,021 $ 24,426 $ 1,692 $ 27,356 $ 927,024 Special mention 29,692 — 1,022 34,532 — — — 65,246 Substandard 1,154 — 14,989 13,182 — — — 29,325 Total Real estate-construction: $ 514,148 $ 330,480 $ 72,758 $ 50,735 $ 24,426 $ 1,692 $ 27,356 $ 1,021,595 Real estate- business Risk Rating: Pass $ 890,740 $ 666,399 $ 336,850 $ 241,656 $ 313,691 $ 199,534 $ 67,796 $ 2,716,666 Special mention 8,936 21,734 49,580 6,597 17,504 1,309 3,002 108,662 Substandard 46,882 1,037 4,061 81,435 17,538 45,014 2,592 198,559 Non-accrual 478 188 1,480 — — 84 — 2,230 Total Real-estate business: $ 947,036 $ 689,358 $ 391,971 $ 329,688 $ 348,733 $ 245,941 $ 73,390 $ 3,026,117 Commercial loans Risk Rating: Pass $ 3,846,461 $ 1,962,947 $ 832,154 $ 573,884 $ 501,474 $ 482,830 $ 1,714,832 $ 9,914,582 Special mention 67,240 48,480 64,704 42,910 22,595 2,973 44,751 293,653 Substandard 65,282 23,022 24,126 97,292 21,116 58,404 71,568 360,810 Non-accrual 13,097 189 6,807 391 502 3,743 25 24,754 Total Commercial loans: $ 3,992,080 $ 2,034,638 $ 927,791 $ 714,477 $ 545,687 $ 547,950 $ 1,831,176 $ 10,593,799 The credit quality of Personal Banking loans is monitored primarily on the basis of aging/delinquency, and this information is provided as of June 30, 2021 and December 31, 2020 below: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total June 30, 2021 Real estate-personal Current to 90 days past due $ 366,723 $ 1,002,972 $ 409,449 $ 183,822 $ 170,790 $ 645,716 $ 9,346 $ 2,788,818 Over 90 days past due — 701 — 171 628 1,223 — 2,723 Non-accrual — 19 186 113 — 1,354 — 1,672 Total Real estate-personal: $ 366,723 $ 1,003,692 $ 409,635 $ 184,106 $ 171,418 $ 648,293 $ 9,346 $ 2,793,213 Consumer Current to 90 days past due $ 311,909 $ 440,654 $ 255,969 $ 115,496 $ 75,121 $ 113,662 $ 734,619 $ 2,047,430 Over 90 days past due 24 175 96 206 69 398 768 1,736 Total Consumer: $ 311,933 $ 440,829 $ 256,065 $ 115,702 $ 75,190 $ 114,060 $ 735,387 $ 2,049,166 Revolving home equity Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 282,794 $ 282,794 Over 90 days past due — — — — — — 774 774 Total Revolving home equity: $ — $ — $ — $ — $ — $ — $ 283,568 $ 283,568 Consumer credit card Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 581,554 $ 581,554 Over 90 days past due — — — — — — 4,804 4,804 Total Consumer credit card: $ — $ — $ — $ — $ — $ — $ 586,358 $ 586,358 Overdrafts Current to 90 days past due $ 2,978 $ — $ — $ — $ — $ — $ — $ 2,978 Total Overdrafts: $ 2,978 $ — $ — $ — $ — $ — $ — $ 2,978 Personal banking loans Current to 90 days past due $ 681,610 $ 1,443,626 $ 665,418 $ 299,318 $ 245,911 $ 759,378 $ 1,608,313 $ 5,703,574 Over 90 days past due 24 876 96 377 697 1,621 6,346 10,037 Non-accrual — 19 186 113 — 1,354 — 1,672 Total Personal banking loans: $ 681,634 $ 1,444,521 $ 665,700 $ 299,808 $ 246,608 $ 762,353 $ 1,614,659 $ 5,715,283 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total December 31, 2020 Real estate-personal Current to 90 days past due $ 1,123,918 $ 488,379 $ 218,390 $ 201,971 $ 227,265 $ 544,008 $ 11,476 $ 2,815,407 Over 90 days past due 534 375 281 411 388 848 — 2,837 Non-accrual 29 191 116 45 65 1,340 — 1,786 Total Real estate-personal: $ 1,124,481 $ 488,945 $ 218,787 $ 202,427 $ 227,718 $ 546,196 $ 11,476 $ 2,820,030 Consumer Current to 90 days past due $ 536,799 $ 337,431 $ 161,337 $ 115,886 $ 75,769 $ 86,831 $ 633,186 $ 1,947,239 Over 90 days past due 212 358 328 220 174 397 1,574 3,263 Total Consumer: $ 537,011 $ 337,789 $ 161,665 $ 116,106 $ 75,943 $ 87,228 $ 634,760 $ 1,950,502 Revolving home equity Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 306,693 $ 306,693 Over 90 days past due — — — — — — 390 390 Total Revolving home equity: $ — $ — $ — $ — $ — $ — $ 307,083 $ 307,083 Consumer credit card Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 642,860 $ 642,860 Over 90 days past due — — — — — — 12,218 12,218 Total Consumer credit card: $ — $ — $ — $ — $ — $ — $ 655,078 $ 655,078 Overdrafts Current to 90 days past due $ 3,149 $ — $ — $ — $ — $ — $ — $ 3,149 Total Overdrafts: $ 3,149 $ — $ — $ — $ — $ — $ — $ 3,149 Personal banking loans Current to 90 days past due $ 1,663,866 $ 825,810 $ 379,727 $ 317,857 $ 303,034 $ 630,839 $ 1,594,215 $ 5,715,348 Over 90 days past due 746 733 609 631 562 1,245 14,182 18,708 Non-accrual 29 191 116 45 65 1,340 — 1,786 Total Personal banking loans: $ 1,664,641 $ 826,734 $ 380,452 $ 318,533 $ 303,661 $ 633,424 $ 1,608,397 $ 5,735,842 Collateral-dependent loans The Company's collateral-dependent loans are comprised of large loans on non-accrual status. The Company requires that collateral-dependent loans are either over-collateralized or carry collateral equal to the amortized cost of the loan. The following table presents the amortized cost basis of collateral-dependent loans as of June 30, 2021 and December 31, 2020. (In thousands) Business Assets Business Real Estate Oil & Gas Assets Total June 30, 2021 Commercial: Business $ — $ — $ 2,578 $ 2,578 Total $ — $ — $ 2,578 $ 2,578 December 31, 2020 Commercial: Business $ 13,109 $ — $ 2,695 $ 15,804 Real estate - business — 986 — 986 Total $ 13,109 $ 986 $ 2,695 $ 16,790 Other Personal Banking loan information As noted above, the credit quality of Personal Banking loans is monitored primarily on the basis of aging/delinquency, and this information is provided in the table in the above section on "Credit quality indicators." In addition, FICO scores are obtained and updated on a quarterly basis for most of the loans in the Personal Banking portfolio. This is a published credit score designed to measure the risk of default by taking into account various factors from a borrower's financial history and is considered supplementary information utilized by the Company, as management does not consider this information in evaluating the allowance for credit losses on loans. The Bank normally obtains a FICO score at the loan's origination and renewal dates, and updates are obtained on a quarterly basis. Excluded from the table below are certain personal real estate loans for which FICO scores are not obtained because the loans generally pertain to commercial customer activities and are often underwritten with other collateral considerations. These loans totaled $187.4 million at June 30, 2021 and $191.1 million at December 31, 2020. The table also excludes consumer loans related to the Company's patient healthcare loan program, which totaled $187.8 million at June 30, 2021 and $188.1 million at December 31, 2020. As the healthcare loans are guaranteed by the hospital, customer FICO scores are not obtained for these loans. The personal real estate loans and consumer loans excluded below totaled less than 7% of the Personal Banking portfolio. For the remainder of loans in the Personal Banking portfolio, the table below shows the percentage of balances outstanding at June 30, 2021 and December 31, 2020 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card June 30, 2021 FICO score: Under 600 .8 % 1.7 % 1.2 % 3.4 % 600 - 659 1.8 3.6 1.8 11.1 660 - 719 7.7 13.5 8.5 30.8 720 - 779 23.4 23.9 22.9 28.5 780 and over 66.3 57.3 65.6 26.2 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2020 FICO score: Under 600 .8 % 2.3 % 1.3 % 5.0 % 600 - 659 1.9 4.2 2.4 12.3 660 - 719 8.8 14.1 8.6 31.2 720 - 779 24.5 23.9 22.2 28.0 780 and over 64.0 55.5 65.5 23.5 Total 100.0 % 100.0 % 100.0 % 100.0 % Troubled debt restructurings Restructured loans are those extended to borrowers who are experiencing financial difficulty and who have been granted a concession. Restructured loans are placed on non-accrual status if the Company does not believe it probable that amounts due under the contractual terms will be collected. Commercial performing restructured loans are primarily comprised of certain business, construction and business real estate loans classified as substandard but renewed at rates judged to be non-market. These loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. Troubled debt restructurings also include certain credit card and other small consumer loans under various debt management and assistance programs. Modifications to these loans generally involve removing the available line of credit, placing loans on amortizing status, and lowering the contractual interest rate. Certain personal real estate, revolving home equity, and consumer loans were classified as consumer bankruptcy troubled debt restructurings because they were not reaffirmed by the borrower in bankruptcy proceedings. Interest on these loans is being recognized on an accrual basis, as the borrowers are continuing to make payments. Other consumer loans classified as troubled debt restructurings consist of various other workout arrangements with consumer customers. (In thousands) June 30, 2021 December 31, 2020 Accruing restructured loans: Commercial $ 97,761 $ 117,740 Assistance programs 7,301 7,804 Consumer bankruptcy 2,554 2,841 Other consumer 2,484 2,353 Non-accrual loans 8,319 9,889 Total troubled debt restructurings $ 118,419 $ 140,627 Section 4013 of the CARES Act was signed into law on March 27, 2020, and includes a provision that short-term modifications are not troubled debt restructurings, if made on a good-faith basis in response to COVID-19 to borrowers who were current prior to December 31, 2019. The Company follows the guidance under the CARES Act when determining if a customer’s modification is subject to troubled debt restructuring classification. If it is deemed the modification is not short- term, not COVID-19 related or the customer does not meet the criteria under the guidance to be scoped out of troubled debt restructuring classification, the Company will evaluate the loan modifications under its existing framework which requires modifications that result in a concession to a borrower experiencing financial difficulty be accounted for as a troubled debt restructuring. The initial guidance issued under the CARES Act was due to expire on December 31, 2020. During January 2021, the Consolidated Appropriations Act, 2021 was enacted and extended through the end of 2021 the relief offered under the CARES Act related to the accounting and disclosure requirements for troubled debt restructurings as a result of COVID-19. The Company elected to adopt the extension of this guidance. The table below shows the balance of troubled debt restructurings by loan classification at June 30, 2021, in addition to the outstanding balances of these restructured loans which the Company considers to have been in default at any time during the past twelve months. For purposes of this disclosure, the Company considers "default" to mean 90 days or more past due as to interest or principal. (In thousands) June 30, 2021 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 40,947 $ 577 Real estate - construction and land 10,105 — Real estate - business 53,734 — Personal Banking: Real estate - personal 3,258 316 Consumer 3,222 230 Revolving home equity 25 — Consumer credit card 7,128 378 Total troubled debt restructurings $ 118,419 $ 1,501 For those loans on non-accrual status also classified as restructured, the modification did not create any further financial effect on the Company as those loans were already recorded at net realizable value. For those performing commercial loans classified as restructured, there were no concessions involving forgiveness of principal or interest and, therefore, there was no financial impact to the Company as a result of modification to these loans. No financial impact resulted from those performing loans where the debt was not reaffirmed in bankruptcy, as no changes to loan terms occurred in that process. However, the effects of modifications to loans under various debt management and assistance programs were estimated to decrease interest income by approximately $867 thousand on an annual, pre-tax basis, compared to amounts contractually owed. Other modifications to consumer loans mainly involve extensions and other small modifications that did not include the forgiveness of principal or interest. The allowance for credit losses related to troubled debt restructurings on non-accrual status is determined by individual evaluation, including collateral adequacy, using the same process as loans on non-accrual status which are not classified as troubled debt restructurings. Those performing loans classified as troubled debt restructurings are accruing loans which management expects to collect under contractual terms. Performing commercial loans having no other concessions granted other than being renewed at non-market interest rates are judged to have similar risk characteristics as non-troubled debt commercial loans and are collectively evaluated based on internal risk rating, loan type, delinquency, historical experience and current economic factors. Performing personal banking loans classified as troubled debt restructurings resulted from the borrower not reaffirming the debt during bankruptcy and have had no other concession granted, other than the Bank's future limitations on collecting payment deficiencies or in pursuing foreclosure actions. As such, they have similar risk characteristics as non-troubled debt personal banking loans and are evaluated collectively based on loan type, delinquency, historical experience and current economic factors. If a troubled debt restructuring defaults and is already on non-accrual status, the allowance for credit losses continues to be based on individual evaluation, using discounted expected cash flows or the fair value of collateral. If an accruing troubled debt restructuring defaults, the loan's risk rating is downgraded to non-accrual status and the loan's related allowance for credit losses is determined based on individual evaluation, or if necessary, the loan is charged off and collection efforts begin. The Company had commitments of $745 thousand at June 30, 2021 to lend additional funds to borrowers with restructured loans. Additionally, the Company had commitments at June 30, 2021 of $24.0 million related to letters of credit with an internal risk rating below substandard. Loans held for sale The Company designates certain long-term fixed rate personal real estate loans as held for sale, and the Company has elected the fair value option for these loans. The election of the fair value option aligns the accounting for these loans with the related economic hedges discussed in Note 11. The loans are primarily sold

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2021
Investment Securities [Abstract]
Investment Securities	Investment Securities Investment securities consisted of the following at June 30, 2021 and December 31, 2020. (In thousands) June 30, 2021 December 31, 2020 Available for sale debt securities $ 13,291,506 $ 12,449,264 Trading debt securities 29,002 35,321 Equity securities: Readily determinable fair value 6,981 2,966 No readily determinable fair value 1,697 1,397 Other: Federal Reserve Bank stock 34,222 34,070 Federal Home Loan Bank stock 10,135 10,307 Equity method investments 15,836 18,000 Private equity investments 116,246 94,368 Total investment securities (1) $ 13,505,625 $ 12,645,693 (1) Accrued interest receivable totaled $39.7 million and $41.5 million at June 30, 2021 and December 31, 2020, respectively, and was included within other assets on the consolidated balance sheet. The Company has elected to measure equity securities with no readily determinable fair value at cost minus impairment, if any, plus or minus changes resulting from observable price changes for the identical or similar investment of the same issuer. This portfolio includes the Company's holdings of Visa Class B shares, which have a carrying value of zero, as there have not been observable price changes in orderly transactions for identical or similar investments of the same issuer. During the period, the Company did not record any impairment or other adjustments to the carrying amount of its portfolio of equity securities with no readily determinable fair value. Other investment securities include Federal Reserve Bank (FRB) stock, Federal Home Loan Bank (FHLB) stock, equity method investments, and investments in portfolio concerns held by the Company's private equity subsidiary. FRB stock and FHLB stock are held for debt and regulatory purposes. Investment in FRB stock is based on the capital structure of the investing bank, and investment in FHLB stock is tied to the level of borrowings from the FHLB. These holdings are carried at cost. Additionally, the Company's equity method investments are carried at cost, adjusted to reflect the Company's portion of income, loss, or dividends of the investee. These adjustments are included in non-interest income on the Company's income statement. The Company's private equity investments, in the absence of readily ascertainable market values, are carried at estimated fair value. The majority of the Company’s investment portfolio is comprised of available for sale debt securities, which are carried at fair value with changes in fair value reported in accumulated other comprehensive income (AOCI). A summary of the available for sale debt securities by maturity groupings as of June 30, 2021 is shown below. The investment portfolio includes agency mortgage-backed securities, which are guaranteed by agencies such as the FHLMC, FNMA, and GNMA, in addition to non- agency mortgage-backed securities, which have no guarantee but are collateralized by commercial and residential mortgages. Also included are certain other asset-backed securities, which are primarily collateralized by credit cards, automobiles, student loans, and commercial loans. These securities differ from traditional debt securities primarily in that they may have uncertain maturity dates and are priced based on estimated prepayment rates on the underlying collateral. (In thousands) Amortized Fair U.S. government and federal agency obligations: Within 1 year $ 29,454 $ 30,159 After 1 but within 5 years 500,689 529,808 After 5 but within 10 years 194,424 220,185 Total U.S. government and federal agency obligations 724,567 780,152 Government-sponsored enterprise obligations: After 10 years 50,788 52,978 Total government-sponsored enterprise obligations 50,788 52,978 State and municipal obligations: Within 1 year 140,856 141,924 After 1 but within 5 years 808,293 840,159 After 5 but within 10 years 655,198 674,067 After 10 years 396,484 395,880 Total state and municipal obligations 2,000,831 2,052,030 Mortgage and asset-backed securities: Agency mortgage-backed securities 5,995,967 6,071,295 Non-agency mortgage-backed securities 825,175 825,608 Asset-backed securities 2,870,004 2,891,799 Total mortgage and asset-backed securities 9,691,146 9,788,702 Other debt securities: Within 1 year 93,051 94,391 After 1 but within 5 years 239,124 245,719 After 5 but within 10 years 258,100 258,294 After 10 years 19,435 19,240 Total other debt securities 609,710 617,644 Total available for sale debt securities $ 13,077,042 $ 13,291,506 Investments in U.S. government and federal agency obligations include U.S. Treasury inflation-protected securities, which totaled $381.5 million, at fair value, at June 30, 2021. Interest paid on these securities increases with inflation and decreases with deflation, as measured by the Consumer Price Index. At maturity, the principal paid is the greater of an inflation-adjusted principal or the original principal. Allowance for credit losses on available for sale debt securities The Company adopted ASU 2016-13, Measurement of Credit Losses on Financial Instruments, on January 1, 2020. The adoption of ASU 2016-13 had no impact to the Company's available for sale securities reported in its consolidated financial statements at January 1, 2020. For the six months ended June 30, 2021 and 2020, the Company did not recognize a credit loss expense on any available for sale debt securities. The Company’s model for establishing its allowance for credit losses uses cash flows projected to be received over the estimated life of the securities, discounted to present value, and compared to the current amortized cost bases of the securities. Securities for which fair value is less than amortized cost are reviewed for impairment. Special emphasis is placed on securities whose credit rating has fallen below Baa3 (Moody's) or BBB- (Standard & Poor's), whose fair values have fallen more than 20% below purchase price, or who have been identified based on management’s judgment. These securities are placed on a watch list and cash flow analyses are prepared on an individual security basis. Credit impairment is determined using input factors such as cash flow projections, contractual payments required, expected delinquency rates, credit support from other tranches, prepayment speeds, collateral loss severity rates (including loan to values), and various other information related to the underlying collateral. At June 30, 2021, the fair value of securities on this watch list was $14.0 million compared to $31.0 million at December 31, 2020. Significant inputs to the cash flow model used at June 30, 2021 to quantify credit losses were primarily credit support agreements, as the securities on the Company's watch list at June 30, 2021 were securities backed by government-guaranteed student loans and are expected to perform as contractually required. As of June 30, 2021, the Company did not identify any securities for which a credit loss exists. The table below summarizes debt securities available for sale in an unrealized loss position, aggregated by length of loss period, for which an allowance for credit losses has not been recorded at June 30, 2021 and December 31, 2020. Unrealized losses on these available for sale securities have not been recognized into income because after review, the securities were deemed not to be impaired. The unrealized losses on these securities are primarily attributable to changes in interest rates and current market conditions. Additionally, management does not intend to sell the securities, and it is more likely than not that management will not be required to sell the securities prior to their anticipated recovery. Less than 12 months 12 months or longer Total (In thousands) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized June 30, 2021 Government-sponsored enterprise obligations $ 19,506 $ 312 $ — $ — $ 19,506 $ 312 State and municipal obligations 454,235 5,130 1,453 7 455,688 5,137 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,326,148 26,833 17,535 180 2,343,683 27,013 Non-agency mortgage-backed securities 364,857 1,407 — — 364,857 1,407 Asset-backed securities 580,334 1,714 129,636 882 709,970 2,596 Total mortgage and asset-backed securities 3,271,339 29,954 147,171 1,062 3,418,510 31,016 Other debt securities 229,295 4,320 — — 229,295 4,320 Total $ 3,974,375 $ 39,716 $ 148,624 $ 1,069 $ 4,122,999 $ 40,785 December 31, 2020 Government-sponsored enterprise obligations $ 19,720 $ 98 $ — $ — $ 19,720 $ 98 State and municipal obligations 45,622 230 — — 45,622 230 Mortgage and asset-backed securities: Agency mortgage-backed securities 470,373 2,802 — — 470,373 2,802 Non-agency mortgage-backed securities 112,861 380 — — 112,861 380 Asset-backed securities 21,360 56 253,734 2,617 275,094 2,673 Total mortgage and asset-backed securities 604,594 3,238 253,734 2,617 858,328 5,855 Other debt securities 24,522 175 — — 24,522 175 Total $ 694,458 $ 3,741 $ 253,734 $ 2,617 $ 948,192 $ 6,358 The entire available for sale debt portfolio included $4.1 billion of securities that were in a loss position at June 30, 2021, compared to $948.2 million at December 31, 2020. The total amount of unrealized loss on these securities was $40.8 million at June 30, 2021, an increase of $34.4 million compared to the loss at December 31, 2020. Securities with significant unrealized losses are discussed in the "Allowance for credit losses on available for sale debt securities" section above. For debt securities classified as available for sale, the following tables show the amortized cost, fair value, and allowance for credit losses of securities available for sale at June 30, 2021 and December 31, 2020, and the corresponding amounts of gross unrealized gains and losses (pre-tax) in AOCI, by security type. (In thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value June 30, 2021 U.S. government and federal agency obligations $ 724,567 $ 55,585 $ — $ — $ 780,152 Government-sponsored enterprise obligations 50,788 2,502 (312) — 52,978 State and municipal obligations 2,000,831 56,336 (5,137) — 2,052,030 Mortgage and asset-backed securities: Agency mortgage-backed securities 5,995,967 102,341 (27,013) — 6,071,295 Non-agency mortgage-backed securities 825,175 1,840 (1,407) — 825,608 Asset-backed securities 2,870,004 24,391 (2,596) — 2,891,799 Total mortgage and asset-backed securities 9,691,146 128,572 (31,016) — 9,788,702 Other debt securities 609,710 12,254 (4,320) — 617,644 Total $ 13,077,042 $ 255,249 $ (40,785) $ — $ 13,291,506 December 31, 2020 U.S. government and federal agency obligations $ 775,592 $ 62,467 $ — $ — $ 838,059 Government-sponsored enterprise obligations 50,803 3,780 (98) — 54,485 State and municipal obligations 1,968,006 77,323 (230) — 2,045,099 Mortgage and asset-backed securities: Agency mortgage-backed securities 6,557,098 157,789 (2,802) — 6,712,085 Non-agency mortgage-backed securities 358,074 3,380 (380) — 361,074 Asset-backed securities 1,853,791 31,125 (2,673) — 1,882,243 Total mortgage and asset-backed securities 8,768,963 192,294 (5,855) — 8,955,402 Other debt securities 534,169 22,225 (175) — 556,219 Total $ 12,097,533 $ 358,089 $ (6,358) $ — $ 12,449,264 The following tables present proceeds from sales of securities and the components of investment securities gains and losses which have been recognized in earnings. For the Six Months Ended June 30 (In thousands) 2021 2020 Proceeds from sales of securities: Available for sale debt securities $ — $ 174,595 Equity securities — 2 Other 10,060 — Total proceeds $ 10,060 $ 174,597 Investment securities gains (losses), net: Available for sale debt securities: Gains realized on sales $ — $ 3,291 Equity securities: Gains realized on sales — 2 Fair value adjustments, net 15 (218) Other: Gains realized on sales 1,611 — Fair value adjustments, net 25,031 (20,505) Total investment securities gains (losses), net $ 26,657 $ (17,430) Net gains on investment securities for the six months ended June 30, 2021 were mainly comprised of gains of $1.6 million realized on the sale of a private equity investment and net gains in fair value of $25.0 million on private equity investments due to fair value adjustments.

Goodwill And Other Intangible A

Goodwill And Other Intangible Assets	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Other Intangible Assets	Goodwill and Other Intangible Assets The following table presents information about the Company's intangible assets which have estimable useful lives. June 30, 2021 December 31, 2020 (In thousands) Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Amortizable intangible assets: Core deposit premium $ 31,270 $ (30,098) $ — $ 1,172 $ 31,270 $ (29,912) $ — $ 1,358 Mortgage servicing rights 18,576 (8,396) (804) 9,376 15,238 (6,886) (2,103) 6,249 Total $ 49,846 $ (38,494) $ (804) $ 10,548 $ 46,508 $ (36,798) $ (2,103) $ 7,607 Aggregate amortization expense on intangible assets was $745 thousand and $442 thousand for the three month periods ended June 30, 2021 and 2020, respectively, and $1.7 million and $710 thousand for the six month periods ended June 30, 2021 and 2020, respectively. The following table shows the estimated annual amortization expense for the next five fiscal years. This expense is based on existing asset balances and the interest rate environment as of June 30, 2021. The Company’s actual amortization expense in any given period may be different from the estimated amounts depending upon the acquisition of intangible assets, changes in mortgage interest rates, prepayment rates and other market conditions. (In thousands) 2021 $ 2,661 2022 1,646 2023 1,377 2024 1,149 2025 952 Changes in the carrying amount of goodwill and net other intangible assets for the six month period ended June 30, 2021 are as follows: (In thousands) Goodwill Easement Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2021 $ 138,921 $ 3,600 $ 1,358 $ 6,249 Originations — — — 3,338 Amortization — — (186) (1,510) Impairment reversal — — — 1,299 Balance June 30, 2021 $ 138,921 $ 3,600 $ 1,172 $ 9,376 Goodwill allocated to the Company’s operating segments at June 30, 2021 and December 31, 2020 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Guarantees

Guarantees	6 Months Ended
	Jun. 30, 2021
Guarantees [Abstract]
Guarantees	Guarantees The Company, as a provider of financial services, routinely issues financial guarantees in the form of financial and performance standby letters of credit. Standby letters of credit are contingent commitments issued by the Company generally to guarantee the payment or performance obligation of a customer to a third party. While these represent a potential outlay by the Company, a significant amount of the commitments may expire without being drawn upon. The Company has recourse against the customer for any amount it is required to pay to a third party under a standby letter of credit. The letters of credit are subject to the same credit policies, underwriting standards and approval process as loans made by the Company. Most of the standby letters of credit are secured, and in the event of nonperformance by customers, the Company has rights to the underlying collateral, which could include commercial real estate, physical plant and property, inventory, receivables, cash and marketable securities. Upon issuance of standby letters of credit, the Company recognizes a liability for the fair value of the obligation undertaken, which is estimated to be equivalent to the amount of fees received from the customer over the life of the agreement. At June 30, 2021, that net liability was $2.9 million, which will be accreted into income over the remaining life of the respective commitments. The contractual amount of these letters of credit, which represents the maximum potential future payments guaranteed by the Company, was $412.7 million at June 30, 2021.

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	Leases The Company has net investments in direct financing and sales-type leases to commercial, industrial, and tax-exempt entities. These leases are included within business loans on the Company's consolidated balance sheets. The Company primarily leases various types of equipment, trucks and trailers, and office furniture and fixtures. Lease agreements may include options for the lessee to renew or purchase the leased equipment at the end of the lease term. The Company has elected to adopt the lease component expedient in which the lease and nonlease components are combined into the total lease receivable. The Company also leases office space to third parties, and these leases are classified as operating leases. The leases may include options to renew or expand the leased space, and currently the leases have remaining terms of 1 month to 6 years. The following table provides the components of lease income. For the Three Months Ended June 30 For the Six Months Ended June 30 (in thousands) 2021 2020 2021 2020 Direct financing and sales-type leases $ 5,795 $ 6,304 $ 11,916 $ 12,662 Operating leases (a) 1,930 2,160 4,004 4,221 Total lease income $ 7,725 $ 8,464 $ 15,920 $ 16,883 (a) Includes rent from Tower Properties Company, a related party, of $19 thousand for the three month periods ended June 30, 2021 and 2020, and $38 thousand for the six months ended June 30, 2021 and 2020.

Pension

Pension	6 Months Ended
	Jun. 30, 2021
Pension [Abstract]
Pension	Pension The amount of net pension cost is shown in the table below: For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2021 2020 2021 2020 Service cost - benefits earned during the period $ 94 $ 101 $ 189 $ 202 Interest cost on projected benefit obligation 556 823 1,112 1,645 Expected return on plan assets (1,124) (1,297) (2,248) (2,594) Amortization of prior service cost (68) (68) (136) (136) Amortization of unrecognized net loss 651 542 1,302 1,084 Net periodic pension cost $ 109 $ 101 $ 219 $ 201

Common Stock

Common Stock	6 Months Ended
	Jun. 30, 2021
Common Stock [Abstract]
Common Stock	Common Stock * Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that pay nonforfeitable common stock dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 13. For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands, except per share data) 2021 2020 2021 2020 Basic income per common share: Net income attributable to Commerce Bancshares, Inc. $ 162,326 $ 39,863 $ 293,298 $ 91,720 Less preferred stock dividends — 2,250 — 4,500 Net income available to common shareholders 162,326 37,613 293,298 87,220 Less income allocated to nonvested restricted stock 1,478 353 2,678 823 Net income allocated to common stock $ 160,848 $ 37,260 $ 290,620 $ 86,397 Weighted average common shares outstanding 116,163 116,242 116,211 116,458 Basic income per common share $ 1.38 $ .32 $ 2.50 $ .74 Diluted income per common share: Net income available to common shareholders $ 162,326 $ 37,613 $ 293,298 $ 87,220 Less income allocated to nonvested restricted stock 1,475 354 2,673 823 Net income allocated to common stock $ 160,851 $ 37,259 $ 290,625 $ 86,397 Weighted average common shares outstanding 116,163 116,242 116,211 116,458 Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods 287 200 301 235 Weighted average diluted common shares outstanding 116,450 116,442 116,512 116,693 Diluted income per common share $ 1.38 $ .32 $ 2.49 $ .74 Unexercised stock appreciation rights of 72 thousand and 321 thousand for the three month periods ended June 30, 2021 and 2020, respectively, and 51 thousand and 276 thousand for the six month periods ended June 30, 2021 and 2020, respectively, were excluded from the computation of diluted income per common share because their inclusion would have been anti-dilutive. On September 1, 2020, the Company redeemed all outstanding shares of its 6.00% Series B Non-Cumulative Perpetual Preferred Stock, $1.00 par value per share (Series B Preferred Stock) and the corresponding depositary shares representing fractional interests in the Series B Preferred Stock (Series B Depositary Shares). * All prior year share and per share amounts in this note have been restated for the 5% common stock dividend distributed in December 2020.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income The table below shows the activity and accumulated balances for components of other comprehensive income. The largest component is the unrealized holding gains and losses on available for sale debt securities. Another component is the amortization from other comprehensive income of losses associated with pension benefits, which occurs as the losses are included in current net periodic pension cost. The remaining component is gains and losses in fair value on certain interest rate floors that have been designated as cash flow hedging instruments. The interest rate floors were terminated during 2020, and the realized gains will be amortized into interest income through the original maturity dates of the interest rate floors. Information about unrealized gains and losses on securities can be found in Note 3, and information about unrealized gains and losses on cash flow hedge derivatives is located in Note 11. Unrealized Gains (Losses) on Securities (1) Pension Loss Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2) Total Accumulated Other Comprehensive Income (Loss) (In thousands) Balance January 1, 2021 $ 263,801 $ (25,118) $ 92,694 $ 331,377 Other comprehensive loss before reclassifications to current earnings (137,270) — — (137,270) Amounts reclassified to current earnings from accumulated other comprehensive income — 1,166 (11,881) (10,715) Current period other comprehensive income (loss), before tax (137,270) 1,166 (11,881) (147,985) Income tax (expense) benefit 34,319 (291) 2,970 36,998 Current period other comprehensive income (loss), net of tax (102,951) 875 (8,911) (110,987) Balance June 30, 2021 $ 160,850 $ (24,243) $ 83,783 $ 220,390 Balance January 1, 2020 $ 102,073 $ (21,940) $ 30,311 $ 110,444 Other comprehensive income before reclassifications to current earnings 223,470 — 99,183 322,653 Amounts reclassified to current earnings from accumulated other comprehensive income (3,292) 948 (1,887) (4,231) Current period other comprehensive income, before tax 220,178 948 97,296 318,422 Income tax expense (55,044) (237) (24,324) (79,605) Current period other comprehensive income, net of tax 165,134 711 72,972 238,817 Balance June 30, 2020 $ 267,207 $ (21,229) $ 103,283 $ 349,261 (1) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains (losses), net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.

Segments

Segments	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segments	SegmentsThe Company segregates financial information for use in assessing its performance and allocating resources among three operating segments: Consumer, Commercial and Wealth. The Consumer segment consists of various consumer loan and deposit products offered through its retail branch network of approximately 160 locations. This segment also includes indirect and other consumer loan financing businesses, along with debit and credit card loan and fee businesses. Residential mortgage origination, sales and servicing functions are included in this Consumer segment, but residential mortgage loans retained by the Company are not considered part of this segment and are instead included in the Other/Elimination column. The Commercial segment provides corporate lending (including the Small Business Banking product line within the branch network), leasing, and international services, along with business and governmental deposit products and commercial cash management services. This segment also includes both merchant and commercial bank card products as well as the Capital Markets Group, which sells fixed income securities and provides securities safekeeping and accounting services to its business and correspondent bank customers. The Wealth segment provides traditional trust and estate planning, advisory and discretionary investment management, and brokerage services. This segment also provides various loan and deposit related services to its private banking customers. The following table presents selected financial information by segment and reconciliations of combined segment totals to consolidated totals. There were no material intersegment revenues between the three segments. Management periodically makes changes to methods of assigning costs and income to its business segments to better reflect operating results. If appropriate, these changes are reflected in prior year information presented below. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended June 30, 2021 Net interest income $ 80,809 $ 114,640 $ 17,654 $ 213,103 $ (5,121) $ 207,982 Provision for credit losses (5,664) 4,952 (4) (716) 46,371 45,655 Non-interest income 36,905 52,259 52,505 141,669 (2,526) 139,143 Investment securities gains, net — — — — 16,804 16,804 Non-interest expense (73,949) (82,617) (34,048) (190,614) (7,512) (198,126) Income before income taxes $ 38,101 $ 89,234 $ 36,107 $ 163,442 $ 48,016 $ 211,458 Six Months Ended June 30, 2021 Net interest income $ 158,748 $ 224,809 $ 35,111 $ 418,668 $ (4,938) $ 413,730 Provision for credit losses (15,565) 4,925 1 (10,639) 62,526 51,887 Non-interest income 75,153 102,987 103,490 281,630 (6,442) 275,188 Investment securities gains, net — — — — 26,657 26,657 Non-interest expense (144,453) (161,898) (67,091) (373,442) (17,257) (390,699) Income before income taxes $ 73,883 $ 170,823 $ 71,511 $ 316,217 $ 60,546 $ 376,763 Three Months Ended June 30, 2020 Net interest income $ 81,270 $ 102,878 $ 13,424 $ 197,572 $ 5,485 $ 203,057 Provision for loan losses (5,025) (3,278) — (8,303) (72,236) (80,539) Non-interest income 36,293 45,939 44,590 126,822 (9,307) 117,515 Investment securities losses, net — — — — (4,129) (4,129) Non-interest expense (75,304) (78,230) (30,213) (183,747) (3,765) (187,512) Income before income taxes $ 37,234 $ 67,309 $ 27,801 $ 132,344 $ (83,952) $ 48,392 Six Months Ended June 30, 2020 Net interest income $ 160,251 $ 188,774 $ 26,383 $ 375,408 $ 28,714 $ 404,122 Provision for credit losses (16,231) (2,922) (3) (19,156) (119,336) (138,492) Non-interest income 70,374 95,826 91,999 258,199 (17,021) 241,178 Investment securities losses, net — — — — (17,430) (17,430) Non-interest expense (152,716) (159,050) (61,982) (373,748) (7,462) (381,210) Income before income taxes $ 61,678 $ 122,628 $ 56,397 $ 240,703 $ (132,535) $ 108,168 The information presented above was derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. This information is based on internal management accounting procedures and methods, which have been developed to reflect the underlying economics of the businesses. The methodologies are applied in connection with funds transfer pricing and assignment of overhead costs among segments. Funds transfer pricing was used in the determination of net interest income by assigning a standard cost (credit) for funds used (provided by) assets and liabilities based on their maturity, prepayment and/or repricing characteristics. The segment activity, as shown above, includes both direct and allocated items. Amounts in the “Other/Elimination” column include activity not related to the segments, such as that relating to administrative functions, the investment securities portfolio, and the effect of certain expense allocations to the segments. The provision for credit losses in this category contains the difference between net loan charge-offs assigned directly to the segments and the recorded provision for credit loss expense. Included in this category’s net interest income are earnings of the investment portfolio, which are not allocated to a segment. The performance measurement of the operating segments is based on the management structure of the Company and is not necessarily comparable with similar information for any other financial institution. The information is also not necessarily indicative of the segments' financial condition and results of operations if they were independent entities.

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2021
Derivative Instrument Detail [Abstract]
Derivative Instruments	Derivative Instruments The notional amounts of the Company’s derivative instruments are shown in the table below. These contractual amounts, along with other terms of the derivative, are used to determine amounts to be exchanged between counterparties and are not a measure of loss exposure. At June 30, 2021, the Company’s derivative instruments are accounted for as free-standing derivatives, and changes in their fair value are recorded in current earnings. (In thousands) June 30, 2021 December 31, 2020 Interest rate swaps $ 2,270,249 $ 2,367,017 Interest rate caps 185,643 103,028 Credit risk participation agreements 386,484 381,170 Foreign exchange contracts 4,662 7,431 Mortgage loan commitments 59,054 67,543 Mortgage loan forward sale contracts 8,701 — Forward TBA contracts 62,500 89,000 Total notional amount $ 2,977,293 $ 3,015,189 The largest group of notional amounts relate to interest rate swap contracts sold to commercial customers who wish to modify their interest rate sensitivity. The customers are engaged in a variety of businesses, including real estate, manufacturing, retail product distribution, education, and retirement communities. These customer swaps are offset by matching contracts purchased by the Company from other financial dealer institutions. Contracts with dealers that require central clearing are novated to a clearing agency who becomes the Company's counterparty. Because of the matching terms of the offsetting contracts, in addition to collateral provisions which mitigate the impact of non-performance risk, changes in fair value subsequent to initial recognition have a minimal effect on earnings. Many of the Company’s interest rate swap contracts with large financial institutions contain contingent features relating to debt ratings or capitalization levels. Under these provisions, if the Company’s debt rating falls below investment grade or if the Company ceases to be “well-capitalized” under risk-based capital guidelines, certain counterparties can require immediate and ongoing collateralization on interest rate swaps in net liability positions or instant settlement of the contracts. The Company maintains debt ratings and capital well above these minimum requirements. During the year ended December 31, 2020, the Company monetized three interest rate floors that were previously classified as cash flow hedges with a combined notional balance of $1.5 billion and an asset fair value of $163.2 million. The unrealized gains will be reclassified into interest income as the underlying forecasted transactions impact earnings through the original maturity dates of the hedged forecasted transactions. As of June 30, 2021, the total realized gains on the monetized cash flow hedges remaining in AOCI was $111.7 million (pre-tax), which will be reclassified into interest income over the next 5.5 years. The Company also contracts with other financial institutions, as a guarantor or beneficiary, to share credit risk associated with certain interest rate swaps through risk participation agreements. The Company’s risks and responsibilities as guarantor are further discussed in Note 5 on Guarantees. In addition, the Company enters into foreign exchange contracts, which are mainly comprised of contracts to purchase or deliver foreign currencies for customers at specific future dates. Under its program to sell residential mortgage loans in the secondary market, the Company designates certain newly-originated residential mortgage loans as held for sale. Derivative instruments arising from this activity include mortgage loan commitments and forward loan sale contracts. Changes in the fair values of the loan commitments and funded loans prior to sale that are due to changes in interest rates are economically hedged with forward contracts to sell residential mortgage-backed securities in the to-be-announced (TBA) market. These forward TBA contracts are also considered to be derivatives and are settled in cash at the security settlement date. The fair values of the Company's derivative instruments, whose notional amounts are listed above, are shown in the table below. Information about the valuation methods used to determine fair value is provided in Note 17 on Fair Value Measurements in the 2020 Annual Report on Form 10-K. The Company's policy is to present its derivative assets and derivative liabilities on a gross basis in its consolidated balance sheets and these are reported in other assets and other liabilities. Certain collateral posted to and from the Company's clearing counterparty has been applied to the fair values of the cleared swaps, such that at June 30, 2021 in the table below, the positive fair values of cleared swaps were reduced by $207 thousand and the negative fair values of cleared swaps were reduced by $46.6 million. At December 31, 2020, there were no reductions to the positive fair values of cleared swaps and the negative fair values of cleared swaps were reduced by $69.2 million. Asset Derivatives Liability Derivatives June 30, 2021 Dec. 31, 2020 June 30, 2021 Dec. 31, 2020 (In thousands ) Fair Value Fair Value Derivative instruments: Interest rate swaps $ 59,170 $ 86,389 $ (12,793) $ (17,199) Interest rate caps 94 1 (94) (1) Credit risk participation agreements 142 216 (333) (701) Foreign exchange contracts 62 57 (43) (103) Mortgage loan commitments 1,820 3,226 — — Mortgage loan forward sale contracts 29 — (1) — Forward TBA contracts 41 — (85) (671) Total $ 61,358 $ 89,889 $ (13,349) $ (18,675) The pre-tax effects of derivative instruments on the consolidated statements of income are shown in the tables below. Amount of Gain or (Loss) Recognized in OCI Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income (In thousands) Total Included Component Excluded Component Total Included Component Excluded Component For the Three Months Ended June 30, 2020 Derivatives in cash flow hedging relationships: Interest rate floors $ 14,566 $ 18,087 $ (3,521) Interest and fees on loans $ 2,155 $ 3,186 $ (1,031) Total $ 14,566 $ 18,087 $ (3,521) Total $ 2,155 $ 3,186 $ (1,031) For the Six Months Ended June 30, 2020 Derivatives in cash flow hedging relationships: Interest rate floors $ 99,183 $ 125,708 $ (26,525) Interest and fees on loans $ 1,887 $ 3,949 $ (2,062) Total $ 99,183 $ 125,708 $ (26,525) Total $ 1,887 $ 3,949 $ (2,062) Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2021 2020 2021 2020 Derivative instruments: Interest rate swaps Other non-interest income $ 875 $ 22 $ 1,950 $ 288 Interest rate caps Other non-interest income — — 15 19 Credit risk participation agreements Other non-interest income (385) 267 (20) 240 Foreign exchange contracts Other non-interest income (12) (44) 84 (82) Mortgage loan commitments Loan fees and sales (35) 2,548 (1,407) 2,089 Mortgage loan forward sale contracts Loan fees and sales (11) 3 28 (1) Forward TBA contracts Loan fees and sales (1,046) (153) 1,860 227 Total $ (614) $ 2,643 $ 2,510 $ 2,780 The following table shows the extent to which assets and liabilities relating to derivative instruments have been offset in the consolidated balance sheets. It also provides information about these instruments which are subject to an enforceable master netting arrangement, irrespective of whether they are offset, and the extent to which the instruments could potentially be offset. Also shown is collateral received or pledged in the form of other financial instruments, which is generally cash or marketable securities. The collateral amounts in this table are limited to the outstanding balances of the related asset or liability (after netting is applied); thus, amounts of excess collateral are not shown. Most of the derivatives in the following table were transacted under master netting arrangements that contain a conditional right of offset, such as close-out netting, upon default. While the Company is party to master netting arrangements with most of its swap derivative counterparties, the Company does not offset derivative assets and liabilities under these agreements on its consolidated balance sheet. Collateral exchanged between the Company and dealer bank counterparties is generally subject to thresholds and transfer minimums, and usually consists of marketable securities. By contract, these may be sold or re-pledged by the secured party until recalled at a subsequent valuation date by the pledging party. For those swap transactions requiring central clearing, the Company posts cash or securities to its clearing agent. Collateral positions are valued daily, and adjustments to amounts received and pledged by the Company are made as appropriate to maintain proper collateralization for these transactions. Swap derivative transactions with customers are generally secured by rights to non-financial collateral, such as real and personal property, which is not shown in the table below. Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Collateral Received/Pledged Net Amount June 30, 2021 Assets: Derivatives subject to master netting agreements $ 59,371 $ — $ 59,371 $ (187) $ — $ 59,184 Derivatives not subject to master netting agreements 1,987 — 1,987 Total derivatives $ 61,358 $ — $ 61,358 Liabilities: Derivatives subject to master netting agreements $ 13,237 $ — $ 13,237 $ (187) $ (11,896) $ 1,154 Derivatives not subject to master netting agreements 112 — 112 Total derivatives $ 13,349 $ — $ 13,349 December 31, 2020 Assets: Derivatives subject to master netting agreements $ 86,497 $ — $ 86,497 $ (108) $ — $ 86,389 Derivatives not subject to master netting agreements 3,392 — 3,392 Total derivatives $ 89,889 $ — $ 89,889 Liabilities: Derivatives subject to master netting agreements $ 18,420 $ — $ 18,420 $ (108) $ (16,738) $ 1,574 Derivatives not subject to master netting agreements 255 — 255 Total derivatives $ 18,675 $ — $ 18,675

Resale and Repurchase Agreement

Resale and Repurchase Agreements	6 Months Ended
	Jun. 30, 2021
Resale and Repurchase Agreements [Abstract]
Resale and Repurchase Agreements [Text Block]	Resale and Repurchase AgreementsThe following table shows the extent to which assets and liabilities relating to securities purchased under agreements to resell (resale agreements) and securities sold under agreements to repurchase (repurchase agreements) have been offset in the consolidated balance sheets, in addition to the extent to which they could potentially be offset. Also shown is collateral received or pledged, which consists of marketable securities. The collateral amounts in the table are limited to the outstanding balances of the related asset or liability (after netting is applied); thus, amounts of excess collateral are not shown. The agreements in the following table were transacted under master netting arrangements that contain a conditional right of offset, such as close-out netting, upon default. Resale and repurchase agreements are agreements to purchase/sell securities subject to an obligation to resell/repurchase the same or similar securities. They are accounted for as collateralized financing transactions, not as sales and purchases of the securities portfolio. The securities collateral accepted or pledged in resale and repurchase agreements with other financial institutions also may be sold or re-pledged by the secured party but is usually delivered to and held by third party trustees. The Company generally retains custody of securities pledged for repurchase agreements with customers. The Company is party to agreements commonly known as collateral swaps. These agreements involve the exchange of collateral under simultaneous repurchase and resale agreements with the same financial institution counterparty. These repurchase and resale agreements have the same principal amounts, inception dates, and maturity dates and have been offset against each other in the consolidated balance sheets, as permitted under the netting provisions of ASC 210-20-45. The collateral swaps totaled $200.0 million at June 30, 2021 and December 31, 2020. At June 30, 2021, the Company had posted collateral of $203.5 million in marketable securities, consisting of agency mortgage-backed bonds, and had accepted $209.2 million in agency mortgage-backed bonds. Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Securities Collateral Received/Pledged Net Amount June 30, 2021 Total resale agreements, subject to master netting arrangements $ 1,500,000 $ (200,000) $ 1,300,000 $ — $ (1,300,000) $ — Total repurchase agreements, subject to master netting arrangements 2,505,893 (200,000) 2,305,893 — (2,305,893) — December 31, 2020 Total resale agreements, subject to master netting arrangements $ 1,050,000 $ (200,000) $ 850,000 $ — $ (850,000) $ — Total repurchase agreements, subject to master netting arrangements 2,256,113 (200,000) 2,056,113 — (2,056,113) — The table below shows the remaining contractual maturities of repurchase agreements outstanding at June 30, 2021 and December 31, 2020, in addition to the various types of marketable securities that have been pledged by the Company as collateral for these borrowings. Remaining Contractual Maturity of the Agreements (In thousands) Overnight and continuous Up to 90 days Greater than 90 days Total June 30, 2021 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 215,729 $ 31,799 $ 8,059 $ 255,587 Agency mortgage-backed securities 1,712,923 54,972 222,475 1,990,370 Non-agency mortgage-backed securities 42,656 — — 42,656 Asset-backed securities 183,979 — — 183,979 Other debt securities 33,301 — — 33,301 Total repurchase agreements, gross amount recognized $ 2,188,588 $ 86,771 $ 230,534 $ 2,505,893 December 31, 2020 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 150,305 $ — $ — $ 150,305 Agency mortgage-backed securities 1,598,614 34,018 220,849 1,853,481 Non-agency mortgage-backed securities 62,742 — — 62,742 Asset-backed securities 155,917 — — 155,917 Other debt securities 33,668 — — 33,668 Total repurchase agreements, gross amount recognized $ 2,001,246 $ 34,018 $ 220,849 $ 2,256,113

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company issues stock-based compensation in the form of nonvested restricted stock and stock appreciation rights (SARs). Most of the awards are issued during the first quarter of each year. The stock-based compensation expense that has been charged against income was $3.8 million and $3.7 million in the three months ended June 30, 2021 and 2020, respectively, and $7.7 million and $7.5 million in the six months ended June 30, 2021 and 2020, respectively. Nonvested stock awards granted generally vest in 4 to 7 years and contain restrictions as to transferability, sale, pledging, or assigning, among others, prior to the end of the vesting period. Dividend and voting rights are conferred upon grant. A summary of the status of the Company’s nonvested share awards as of June 30, 2021, and changes during the six month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2021 1,099,866 $52.11 Granted 202,202 72.09 Vested (227,590) 43.30 Forfeited (12,982) 56.84 Nonvested at June 30, 2021 1,061,496 $57.74 SARs are granted with exercise prices equal to the market price of the Company’s stock at the date of grant. SARs vest ratably over 4 years of continuous service and have contractual terms of 10 years. All SARs must be settled in stock under provisions of the plan. In determining compensation cost, the Black-Scholes option-pricing model is used to estimate the fair value of SARs on date of grant. The current year per share average fair value and the model assumptions are shown in the table below. Weighted per share average fair value at grant date $16.78 Assumptions: Dividend yield 1.4 % Volatility 28.2 % Risk-free interest rate .7 % Expected term 5.7 years A summary of SAR activity during the first six months of 2021 is presented below. (Dollars in thousands, except per share data) Rights Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2021 1,005,896 $44.95 Granted 72,416 72.91 Forfeited (3,906) 59.19 Expired (280) 57.95 Exercised (214,271) 39.59 Outstanding at June 30, 2021 859,855 $48.57 6.3 years $ 22,356

Revenue from Contract with Cust

Revenue from Contract with Customer	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers The core principle of ASU 2014-09, "Revenue from Contracts with Customers," is that an entity should recognize revenue to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. For the six months ended June 30, 2021, approximately 60% of the Company’s total revenue was comprised of net interest income, which is not within the scope of this guidance. Of the remaining revenue, those items that were subject to this guidance mainly included fees for bank card, trust, deposit account services and consumer brokerage services. The following table disaggregates non-interest income subject to ASU 2014-09 by major product line. Three Months Ended June 30 Six Months Ended June 30 (In thousands) 2021 2020 2021 2020 Bank card transaction fees $ 42,608 $ 33,745 $ 80,303 $ 73,945 Trust fees 46,257 37,942 90,384 77,907 Deposit account charges and other fees 23,988 22,279 46,563 45,956 Consumer brokerage services 4,503 3,011 8,584 7,088 Other non-interest income 6,962 7,443 14,658 16,152 Total non-interest income from contracts with customers 124,318 104,420 240,492 221,048 Other non-interest income (1) 14,825 13,095 34,696 20,130 Total non-interest income $ 139,143 $ 117,515 $ 275,188 $ 241,178 (1) This revenue is not within the scope of ASU 2014-09, and includes fees relating to capital market activities, loan fees and sales, derivative instruments, standby letters of credit and various other transactions. For bank card transaction fees, the majority of debit and credit card fees are earned in the Consumer segment, while corporate card and merchant fees are earned in the Commercial segment. The Consumer and Commercial segments each contribute approximately half of the Company's deposit account charge revenue. All trust fees and consumer brokerage services income are earned in the Wealth segment. The following table presents the opening and closing receivable balances for the six month periods ended June 30, 2021 and 2020 for the Company’s significant revenue categories subject to ASU 2014-09. (In thousands) June 30, 2021 December 31, 2020 June 30, 2020 December 31, 2019 Bank card transaction fees $ 13,248 $ 14,199 $ 10,655 $ 13,915 Trust fees 2,253 2,071 2,147 2,093 Deposit account charges and other fees 6,616 6,933 6,564 6,523 Consumer brokerage services 355 432 476 596 For these revenue categories, none of the transaction price has been allocated to performance obligations that are unsatisfied as of the end of a reporting period.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2021
Fair Value Measurements [Abstract]
Fair Value Measurements	Fair Value Measurements The Company uses fair value measurements to record fair value adjustments to certain financial and nonfinancial assets and liabilities and to determine fair value disclosures. Various financial instruments such as available for sale debt securities, equity securities, trading debt securities, certain investments relating to private equity activities, and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets and liabilities on a nonrecurring basis, such as mortgage servicing rights and certain other investment securities. These nonrecurring fair value adjustments typically involve lower of cost or fair value accounting or write-downs of individual assets. Fair value is 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. Depending on the nature of the asset or liability, the Company uses various valuation techniques and assumptions when estimating fair value. For accounting disclosure purposes, a three-level valuation hierarchy of fair value measurements has been established. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows: • Level 1 – inputs to the valuation methodology are quoted prices for identical assets or liabilities in active markets. • Level 2 – inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, and inputs that are observable for the assets or liabilities, either directly or indirectly (such as interest rates, yield curves, and prepayment speeds). • Level 3 – inputs to the valuation methodology are unobservable and significant to the fair value. These may be internally developed, using the Company’s best information and assumptions that a market participant would consider. The valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis are described in the Fair Value Measurements note in the Company's 2020 Annual Report on Form 10-K. There have been no significant changes in these methodologies since then. Instruments Measured at Fair Value on a Recurring Basis The table below presents the June 30, 2021 and December 31, 2020 carrying values of assets and liabilities measured at fair value on a recurring basis. There were no transfers among levels during the first six months of 2021 or the year ended December 31, 2020. Fair Value Measurements Using (In thousands) Total Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs June 30, 2021 Assets: Residential mortgage loans held for sale $ 17,374 $ — $ 17,374 $ — Available for sale debt securities: U.S. government and federal agency obligations 780,152 780,152 — — Government-sponsored enterprise obligations 52,978 — 52,978 — State and municipal obligations 2,052,030 — 2,044,039 7,991 Agency mortgage-backed securities 6,071,295 — 6,071,295 — Non-agency mortgage-backed securities 825,608 — 825,608 — Asset-backed securities 2,891,799 — 2,891,799 — Other debt securities 617,644 — 617,644 — Trading debt securities 29,002 — 29,002 — Equity securities 6,981 6,981 — — Private equity investments 116,246 — — 116,246 Derivatives * 61,358 — 59,396 1,962 Assets held in trust for deferred compensation plan 20,969 20,969 — — Total assets 13,543,436 808,102 12,609,135 126,199 Liabilities: Derivatives * 13,349 — 13,016 333 Liabilities held in trust for deferred compensation plan 20,969 20,969 — — Total liabilities $ 34,318 $ 20,969 $ 13,016 $ 333 December 31, 2020 Assets: Residential mortgage loans held for sale $ 39,396 $ — $ 39,396 $ — Available for sale debt securities: U.S. government and federal agency obligations 838,059 838,059 — — Government-sponsored enterprise obligations 54,485 — 54,485 — State and municipal obligations 2,045,099 — 2,037,131 7,968 Agency mortgage-backed securities 6,712,085 — 6,712,085 — Non-agency mortgage-backed securities 361,074 — 361,074 — Asset-backed securities 1,882,243 — 1,882,243 — Other debt securities 556,219 — 556,219 — Trading debt securities 35,321 — 35,321 — Equity securities 2,966 2,966 — — Private equity investments 94,368 — — 94,368 Derivatives * 89,889 — 86,447 3,442 Assets held in trust for deferred compensation plan 19,278 19,278 — — Total assets 12,730,482 860,303 11,764,401 105,778 Liabilities: Derivatives * 18,675 — 17,974 701 Liabilities held in trust for deferred compensation plan 19,278 19,278 — — Total liabilities $ 37,953 $ 19,278 $ 17,974 $ 701 * The fair value of each class of derivative is shown in Note 11. The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are summarized as follows: Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (In thousands) State and Municipal Obligations Private Equity Investments Derivatives Total For the three months ended June 30, 2021 Balance March 31, 2021 $ 7,970 $ 94,257 $ 1,636 $ 103,863 Total gains or losses (realized/unrealized): Included in earnings — 16,666 (420) 16,246 Included in other comprehensive income * 18 — — 18 Discount accretion 3 — — 3 Purchases of private equity investments — 5,656 — 5,656 Sale/pay down of private equity investments — (356) — (356) Capitalized interest/dividends — 23 — 23 Purchase of risk participation agreement — — 445 445 Sale of risk participation agreements — — (32) (32) Balance June 30, 2021 $ 7,991 $ 116,246 $ 1,629 $ 125,866 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ — $ 16,666 $ 1,434 $ 18,100 Total gains or losses for the three months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 18 $ — $ — $ 18 For the six months ended June 30, 2021 Balance January 1, 2021 $ 7,968 $ 94,368 $ 2,741 $ 105,077 Total gains or losses (realized/unrealized): Included in earnings — 25,031 (1,427) 23,604 Included in other comprehensive income * 17 — — 17 Discount accretion 6 — — 6 Purchases of private equity investments — 5,656 — 5,656 Sale/pay down of private equity investments — (8,832) — (8,832) Capitalized interest/dividends — 23 — 23 Purchase of risk participation agreement — — 445 445 Sale of risk participation agreement — — (130) (130) Balance June 30, 2021 $ 7,991 $ 116,246 $ 1,629 $ 125,866 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ — $ 25,031 $ 1,629 $ 26,660 Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 17 $ — $ — $ 17 Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (In thousands) State and Municipal Obligations Private Equity Investments Derivatives Total For the three months ended June 30, 2020 Balance March 31, 2020 $ 8,362 $ 81,159 $ (557) $ 88,964 Total gains or losses (realized/unrealized): Included in earnings — (7,497) 2,814 (4,683) Included in other comprehensive income * 1,123 — — 1,123 Discount accretion 5 — — 5 Purchases of private equity investments — 155 — 155 Capitalized interest/dividends — 29 — 29 Sale of risk participation agreement — — (369) (369) Balance June 30, 2020 $ 9,490 $ 73,846 $ 1,888 $ 85,224 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ — $ (7,497) $ 2,815 $ (4,682) Total gains or losses for the three months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ 1,123 $ — $ — $ 1,123 For the six months ended June 30, 2020 Balance January 1, 2020 $ 9,853 $ 94,122 $ 369 $ 104,344 Total gains or losses (realized/unrealized): Included in earnings — (20,505) 2,328 (18,177) Included in other comprehensive income * (372) — — (372) Discount accretion 9 — — 9 Purchases of private equity investments — 269 — 269 Sale/pay down of private equity investments — (69) — (69) Capitalized interest/dividends — 29 — 29 Sale of risk participation agreement — — (809) (809) Balance June 30, 2020 $ 9,490 $ 73,846 $ 1,888 $ 85,224 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ — $ (20,505) $ 2,759 $ (17,746) Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ (372) $ — $ — $ (372) * Included in "net unrealized gains (losses) on other securities" in the consolidated statements of comprehensive income. Gains and losses included in earnings for the Level 3 assets and liabilities in the previous table are reported in the following line items in the consolidated statements of income: (In thousands) Loan Fees and Sales Other Non-Interest Income Investment Securities Gains (Losses), Net Total For the three months ended June 30, 2021 Total gains or losses included in earnings $ (35) $ (385) $ 16,666 $ 16,246 Change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 1,820 $ (386) $ 16,666 $ 18,100 For the six months ended June 30, 2021 Total gains or losses included in earnings $ (1,407) $ (20) $ 25,031 $ 23,604 Change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 1,820 $ (191) $ 25,031 $ 26,660 For the three months ended June 30, 2020 Total gains or losses included in earnings $ 2,547 $ 267 $ (7,497) $ (4,683) Change in unrealized gains or losses relating to assets still held at June 30, 2020 $ 2,547 $ 268 $ (7,497) $ (4,682) For the six months ended June 30, 2020 Total gains or losses included in earnings $ 2,088 $ 240 $ (20,505) $ (18,177) Change in unrealized gains or losses relating to assets still held at June 30, 2020 $ 2,547 $ 212 $ (20,505) $ (17,746) Level 3 Inputs The Company's significant Level 3 measurements, which employ unobservable inputs that are readily quantifiable, pertain to auction rate securities (ARS), investments in portfolio concerns held by the Company's private equity subsidiaries, and held for sale residential mortgage loan commitments. ARS are included in state and municipal securities and totaled $8.0 million at June 30, 2021, while private equity investments, included in other securities, totaled $116.2 million. Information about these inputs is presented in the table below. Quantitative Information about Level 3 Fair Value Measurements Weighted Valuation Technique Unobservable Input Range Average* Auction rate securities Discounted cash flow Estimated market recovery period 5 years 5 years Estimated market rate 1.1% - 1.4% 1.2% Private equity investments Market comparable companies EBITDA multiple 4.0 - 6.0 5.3 Mortgage loan commitments Discounted cash flow Probability of funding 68.3% - 100.0% 86.7% Embedded servicing value .7% - 1.1% 1.0% * Unobservable inputs were weighted by the relative fair value of the instruments. Instruments Measured at Fair Value on a Nonrecurring Basis For assets measured at fair value on a nonrecurring basis during the first six months of 2021 and 2020, and still held as of June 30, 2021 and 2020, the following table provides the adjustments to fair value recognized during the respective periods, the level of valuation inputs used to determine each adjustment, and the carrying value of the related individual assets or portfolios at June 30, 2021 and 2020. Fair Value Measurements Using (In thousands) Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Gains (Losses) Recognized During the Six Months Ended June 30 June 30, 2021 Mortgage servicing rights $ 9,376 $ — $ — $ 9,376 $ 1,299 Long-lived assets 984 — — 984 (276) June 30, 2020 Collateral dependent loans $ 12,066 $ — $ — $ 12,066 $ (3,079) Mortgage servicing rights 5,625 — — 5,625 (1,851) Long-lived assets 348 — — 348 (5) The Company's significant Level 3 measurements that are measured on a nonrecurring basis pertain to the Company's mortgage servicing rights retained on certain fixed rate personal real estate loan originations. Mortgage servicing rights are included in other assets on the consolidated balance sheet, and information about these inputs is presented in the table below. Quantitative Information about Level 3 Fair Value Measurements Weighted Valuation Technique Unobservable Input Range Average* Mortgage servicing rights Discounted cash flow Discount rate 9.02 % - 9.34 % 9.17 % Prepayment speeds (CPR)* 10.46 % - 13.21 % 12.11 % Loan servicing costs - annually per loan Performing loans $ 70 - $ 72 $ 71 Delinquent loans $ 200 - $ 750 Loans in foreclosure $ 1,000 *Ranges and weighted averages based on interest rate tranches. The significant unobservable inputs used in the fair value measurement of the Company’s mortgage servicing rights are updated periodically for changes in market conditions. Actual rates may differ from our estimates. Increases in prepayment speed and discount rates negatively impact the fair value of our mortgage servicing rights.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	6 Months Ended
	Jun. 30, 2021
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	Fair Value of Financial Instruments The carrying amounts and estimated fair values of financial instruments held by the Company are set forth below. Fair value estimates are made at a specific point in time based on relevant market information. They do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for many of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, risk characteristics and economic conditions. These estimates are subjective, involve uncertainties, and cannot be determined with precision. Changes in assumptions could significantly affect the estimates. The estimated fair values of the Company’s financial instruments and the classification of their fair value measurement within the valuation hierarchy are as follows at June 30, 2021 and December 31, 2020: Carrying Amount Estimated Fair Value at June 30, 2021 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 5,803,760 $ — $ — $ 5,750,743 $ 5,750,743 Real estate - construction and land 1,103,661 — — 1,080,298 1,080,298 Real estate - business 3,017,560 — — 3,014,609 3,014,609 Real estate - personal 2,793,213 — — 2,796,020 2,796,020 Consumer 2,049,166 — — 2,048,176 2,048,176 Revolving home equity 283,568 — — 281,395 281,395 Consumer credit card 586,358 — — 542,235 542,235 Overdrafts 2,978 — — 2,789 2,789 Total loans 15,640,264 — — 15,516,265 15,516,265 Loans held for sale 23,697 — 23,697 — 23,697 Investment securities 13,488,092 787,133 12,532,365 168,594 13,488,092 Federal funds sold 5,945 5,945 — — 5,945 Securities purchased under agreements to resell 1,300,000 — — 1,320,677 1,320,677 Interest earning deposits with banks 2,161,644 2,161,644 — — 2,161,644 Cash and due from banks 358,122 358,122 — — 358,122 Derivative instruments 61,358 — 59,396 1,962 61,358 Assets held in trust for deferred compensation plan 20,969 20,969 — — 20,969 Total $ 33,060,091 $ 3,333,813 $ 12,615,458 $ 17,007,498 $ 32,956,769 Financial Liabilities Non-interest bearing deposits $ 11,085,286 $ 11,085,286 $ — $ — $ 11,085,286 Savings, interest checking and money market deposits 14,654,696 14,654,696 — — 14,654,696 Certificates of deposit 1,746,255 — — 1,748,788 1,748,788 Federal funds purchased 12,335 12,335 — — 12,335 Securities sold under agreements to repurchase 2,305,893 — — 2,305,957 2,305,957 Other borrowings 1,411 — 1,411 — 1,411 Derivative instruments 13,349 — 13,016 333 13,349 Liabilities held in trust for deferred compensation plan 20,969 20,969 — — 20,969 Total $ 29,840,194 $ 25,773,286 $ 14,427 $ 4,055,078 $ 29,842,791 Carrying Amount Estimated Fair Value at December 31, 2020 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 6,546,087 $ — $ — $ 6,467,572 $ 6,467,572 Real estate - construction and land 1,021,595 — — 995,873 995,873 Real estate - business 3,026,117 — — 3,016,576 3,016,576 Real estate - personal 2,820,030 — — 2,830,521 2,830,521 Consumer 1,950,502 — — 1,953,217 1,953,217 Revolving home equity 307,083 — — 304,434 304,434 Consumer credit card 655,078 — — 576,320 576,320 Overdrafts 3,149 — — 3,068 3,068 Total loans 16,329,641 — — 16,147,581 16,147,581 Loans held for sale 45,089 — 45,089 — 45,089 Investment securities 12,626,296 841,025 11,638,558 146,713 12,626,296 Securities purchased under agreements to resell 850,000 — — 894,338 894,338 Interest earning deposits with banks 1,747,363 1,747,363 — — 1,747,363 Cash and due from banks 437,563 437,563 — — 437,563 Derivative instruments 89,889 — 86,447 3,442 89,889 Assets held in trust for deferred compensation plan 19,278 19,278 — — 19,278 Total $ 32,145,119 $ 3,045,229 $ 11,770,094 $ 17,192,074 $ 32,007,397 Financial Liabilities Non-interest bearing deposits $ 10,497,598 $ 10,497,598 $ — $ — $ 10,497,598 Savings, interest checking and money market deposits 14,604,456 14,604,456 — — 14,604,456 Certificates of deposit 1,844,691 — — 1,847,277 1,847,277 Federal funds purchased 42,270 42,270 — — 42,270 Securities sold under agreements to repurchase 2,056,113 — — 2,056,173 2,056,173 Derivative instruments 18,675 — 17,974 701 18,675 Liabilities held in trust for deferred compensation plan 19,278 19,278 — — 19,278 Total $ 29,083,081 $ 25,163,602 $ 17,974 $ 3,904,151 $ 29,085,727

Legal and Regulatory Proceeding

Legal and Regulatory Proceedings	6 Months Ended
	Jun. 30, 2021
Legal Proceedings [Abstract]
Legal Matters and Contingencies [Text Block]	Legal and Regulatory ProceedingsThe Company has various legal proceedings pending at June 30, 2021, arising in the normal course of business. While some matters pending against the Company specify damages claimed by plaintiffs, others do not seek a specified amount of damages or are at early stages of the legal process. The Company records a loss accrual for all legal and regulatory matters for which it deems a loss is probable and can be reasonably estimated. Some matters, which are in the early stages, have not yet progressed to the point where a loss amount can be determined to be probable and estimable.

Loans And Allowance For Credi_2

Loans And Allowance For Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Summary Classification Of Held For Investment Loan Portfolio	Major classifications within the Company’s held for investment loan portfolio at June 30, 2021 and December 31, 2020 are as follows: (In thousands) June 30, 2021 December 31, 2020 Commercial: Business $ 5,803,760 $ 6,546,087 Real estate – construction and land 1,103,661 1,021,595 Real estate – business 3,017,560 3,026,117 Personal Banking: Real estate – personal 2,793,213 2,820,030 Consumer 2,049,166 1,950,502 Revolving home equity 283,568 307,083 Consumer credit card 586,358 655,078 Overdrafts 2,978 3,149 Total loans $ 15,640,264 $ 16,329,641
CECL Model Inputs	Key model assumptions in the Company’s allowance for credit loss model include the economic forecast, the reasonable and supportable period, prepayment assumptions and qualitative factors applied for portfolio composition changes, underwriting practices, or significant unique events or conditions. The assumptions utilized in estimating the Company’s allowance for credit losses at June 30, 2021 and March 31, 2021 are discussed below. Key Assumption June 30, 2021 March 31, 2021 Overall economic forecast • An optimistic recovery from the Global Coronavirus Recession (GCR) continues • Assumes improving health conditions and expanding vaccine distribution • Further fiscal stimulus assumed • Continued uncertainty regarding the assumptions related to the health crisis • Uncertainty regarding rising inflation • The recovery from the GCR continues • Assumes improving health conditions and expanding vaccine distribution • Considers government stimulus • Continued uncertainty regarding the assumptions related to the health crisis Reasonable and supportable period and related reversion period • One year for commercial and personal banking loans • Reversion to historical average loss rates within two quarters using straight-line method • One year for commercial and personal banking loans • Reversion to historical average loss rates within two quarters using straight-line method Forecasted macro-economic variables • Unemployment rate ranging from 4.6% to 4.0% during the supportable forecast period • Real GDP growth ranging from 10.7% to 1.7% • Prime rate of 3.25% • Unemployment rate ranging from 5.8% to 4.5% during the supportable forecast period • Real GDP growth ranges from 11.1% to 1.0% • Prime rate of 3.25% Prepayment assumptions Commercial loans • 5% for most loan pools Personal banking loans • Ranging from 25.4% to 16.5% for most loan pools • 60.1% for consumer credit cards Commercial loans • 5% for most loan pools Personal banking loans • Ranging from 26.4% to 23.6% for most loan pools • 58.5% for consumer credit cards Qualitative factors Added net reserves using qualitative processes related to: • Loans originated in our expansion markets, loans that are designated as shared national credits, and certain portfolios considered to be COVID-19 impacted • Changes in the composition of the loan portfolios • Loans downgraded to special mention, substandard, or non-accrual status Added net reserves using qualitative processes related to: • Loans originated in our expansion markets, loans that are designated as shared national credits, and certain portfolios considered to be COVID-19 impacted • Changes in the composition of the loan portfolios • Loans downgraded to special mention, substandard, or non-accrual status
Summary Of Activity In The Allowance For Credit Losses	A summary of the activity in the allowance for credit losses on loans and the liability for unfunded lending commitments during the three and six months ended June 30, 2021 and 2020, respectively, follows: For the Three Months Ended June 30, 2021 For the Six Months Ended June 30, 2021 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total ALLOWANCE FOR CREDIT LOSSES ON LOANS Balance at beginning of period $ 119,623 $ 80,904 $ 200,527 $ 121,549 $ 99,285 $ 220,834 Provision for credit losses on loans (26,579) (854) (27,433) (28,488) (9,300) (37,788) Deductions: Loans charged off 270 8,598 8,868 502 21,307 21,809 Less recoveries on loans 5,264 2,905 8,169 5,479 5,679 11,158 Net loan charge-offs (recoveries) (4,994) 5,693 699 (4,977) 15,628 10,651 Balance June 30, 2021 $ 98,038 $ 74,357 $ 172,395 $ 98,038 $ 74,357 $ 172,395 LIABILITY FOR UNFUNDED LENDING COMMITMENTS Balance at beginning of period $ 41,513 $ 917 $ 42,430 $ 37,259 $ 1,048 $ 38,307 Provision for credit losses on unfunded lending commitments (18,163) (59) (18,222) (13,909) (190) (14,099) Balance June 30, 2021 $ 23,350 $ 858 $ 24,208 $ 23,350 $ 858 $ 24,208 ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS $ 121,388 $ 75,215 $ 196,603 $ 121,388 $ 75,215 $ 196,603 For the Three Months Ended June 30, 2020 For the Six Months Ended June 30, 2020 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total ALLOWANCE FOR CREDIT LOSSES ON LOANS Balance at end of prior period $ 83,551 $ 88,102 $ 171,653 $ 91,760 $ 68,922 $ 160,682 Adoption of ASU 2016-13 — — — (29,711) 8,672 (21,039) Balance at beginning of period $ 83,551 $ 88,102 $ 171,653 $ 62,049 $ 77,594 $ 139,643 Provision for credit losses on loans 50,245 27,246 77,491 71,353 49,006 120,359 Deductions: Loans charged off 3,386 7,859 11,245 3,802 21,835 25,637 Less recoveries on loans 143 2,702 2,845 953 5,426 6,379 Net loan charge-offs 3,243 5,157 8,400 2,849 16,409 19,258 Balance June 30, 2020 $ 130,553 $ 110,191 $ 240,744 $ 130,553 $ 110,191 $ 240,744 LIABILITY FOR UNFUNDED LENDING COMMITMENTS Balance at end of prior period $ 31,061 $ 1,189 $ 32,250 $ 399 $ 676 $ 1,075 Adoption of ASU 2016-13 — — — 16,057 33 16,090 Balance at beginning of period $ 31,061 $ 1,189 $ 32,250 $ 16,456 $ 709 $ 17,165 Provision for credit losses on unfunded lending commitments 2,991 58 3,049 17,596 538 18,134 Balance June 30, 2020 $ 34,052 $ 1,247 $ 35,299 $ 34,052 $ 1,247 $ 35,299 ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS $ 164,605 $ 111,438 $ 276,043 $ 164,605 $ 111,438 $ 276,043
Aging Information On Past Due And Nonaccrual Loans	The following table provides aging information on the Company’s past due and accruing loans, in addition to the balances of loans on non-accrual status, at June 30, 2021 and December 31, 2020. (In thousands) Current or Less Than 30 Days Past Due 30 – 89 Days Past Due 90 Days Past Due and Still Accruing Non-accrual Total June 30, 2021 Commercial: Business $ 5,777,100 $ 17,547 $ 274 $ 8,839 $ 5,803,760 Real estate – construction and land 1,101,716 1,728 217 — 1,103,661 Real estate – business 3,012,063 3,032 1,810 655 3,017,560 Personal Banking: Real estate – personal 2,783,135 5,683 2,723 1,672 2,793,213 Consumer 2,028,740 18,690 1,736 — 2,049,166 Revolving home equity 281,679 1,115 774 — 283,568 Consumer credit card 577,576 3,978 4,804 — 586,358 Overdrafts 2,786 192 — — 2,978 Total $ 15,564,795 $ 51,965 $ 12,338 $ 11,166 $ 15,640,264 December 31, 2020 Commercial: Business $ 6,517,838 $ 2,252 $ 3,473 $ 22,524 $ 6,546,087 Real estate – construction and land 1,021,592 — 3 — 1,021,595 Real estate – business 3,016,215 7,666 6 2,230 3,026,117 Personal Banking: Real estate – personal 2,808,886 6,521 2,837 1,786 2,820,030 Consumer 1,921,822 25,417 3,263 — 1,950,502 Revolving home equity 305,037 1,656 390 — 307,083 Consumer credit card 635,770 7,090 12,218 — 655,078 Overdrafts 2,896 253 — — 3,149 Total $ 16,230,056 $ 50,855 $ 22,190 $ 26,540 $ 16,329,641
Risk Category of Loans in Commercial Portfolio	The risk category of loans in the Commercial portfolio as of June 30, 2021 and December 31, 2020 are as follows: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total June 30, 2021 Business Risk Rating: Pass $ 977,576 $ 1,388,657 $ 803,333 $ 345,101 $ 216,034 $ 342,506 $ 1,574,367 $ 5,647,574 Special mention 611 568 24,203 14,099 669 6,029 16,815 62,994 Substandard 2,652 10,286 16,848 4,275 1,833 13,078 35,381 84,353 Non-accrual 485 — 1 2,387 110 5,831 25 8,839 Total Business: $ 981,324 $ 1,399,511 $ 844,385 $ 365,862 $ 218,646 $ 367,444 $ 1,626,588 $ 5,803,760 Real estate-construction Risk Rating: Pass $ 231,955 $ 478,413 $ 180,706 $ 54,210 $ 2,723 $ 25,091 $ 25,353 $ 998,451 Special mention 15,469 28,020 — 1,004 19,474 — — 63,967 Substandard 305 12,377 — 15,364 13,197 — — 41,243 Total Real estate-construction: $ 247,729 $ 518,810 $ 180,706 $ 70,578 $ 35,394 $ 25,091 $ 25,353 $ 1,103,661 Real estate-business Risk Rating: Pass $ 318,815 $ 832,940 $ 631,352 $ 266,537 $ 210,149 $ 362,561 $ 60,090 $ 2,682,444 Special mention 2,484 31,269 10,328 23,036 3,354 4,255 74 74,800 Substandard 17,019 63,023 12,027 32,963 77,441 54,132 3,056 259,661 Non-accrual 245 65 87 221 — 37 — 655 Total Real estate-business: $ 338,563 $ 927,297 $ 653,794 $ 322,757 $ 290,944 $ 420,985 $ 63,220 $ 3,017,560 Commercial loans Risk Rating: Pass $ 1,528,346 $ 2,700,010 $ 1,615,391 $ 665,848 $ 428,906 $ 730,158 $ 1,659,810 $ 9,328,469 Special mention 18,564 59,857 34,531 38,139 23,497 10,284 16,889 201,761 Substandard 19,976 85,686 28,875 52,602 92,471 67,210 38,437 385,257 Non-accrual 730 65 88 2,608 110 5,868 25 9,494 Total Commercial loans: $ 1,567,616 $ 2,845,618 $ 1,678,885 $ 759,197 $ 544,984 $ 813,520 $ 1,715,161 $ 9,924,981 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total December 31, 2020 Business Risk Rating: Pass $ 2,472,419 $ 966,068 $ 438,557 $ 329,207 $ 163,357 $ 281,604 $ 1,619,680 $ 6,270,892 Special mention 28,612 26,746 14,102 1,781 5,091 1,664 41,749 119,745 Substandard 17,246 21,985 5,076 2,675 3,578 13,390 68,976 132,926 Non-accrual 12,619 1 5,327 391 502 3,659 25 22,524 Total Business: $ 2,530,896 $ 1,014,800 $ 463,062 $ 334,054 $ 172,528 $ 300,317 $ 1,730,430 $ 6,546,087 Real estate-construction Risk Rating: Pass $ 483,302 $ 330,480 $ 56,747 $ 3,021 $ 24,426 $ 1,692 $ 27,356 $ 927,024 Special mention 29,692 — 1,022 34,532 — — — 65,246 Substandard 1,154 — 14,989 13,182 — — — 29,325 Total Real estate-construction: $ 514,148 $ 330,480 $ 72,758 $ 50,735 $ 24,426 $ 1,692 $ 27,356 $ 1,021,595 Real estate- business Risk Rating: Pass $ 890,740 $ 666,399 $ 336,850 $ 241,656 $ 313,691 $ 199,534 $ 67,796 $ 2,716,666 Special mention 8,936 21,734 49,580 6,597 17,504 1,309 3,002 108,662 Substandard 46,882 1,037 4,061 81,435 17,538 45,014 2,592 198,559 Non-accrual 478 188 1,480 — — 84 — 2,230 Total Real-estate business: $ 947,036 $ 689,358 $ 391,971 $ 329,688 $ 348,733 $ 245,941 $ 73,390 $ 3,026,117 Commercial loans Risk Rating: Pass $ 3,846,461 $ 1,962,947 $ 832,154 $ 573,884 $ 501,474 $ 482,830 $ 1,714,832 $ 9,914,582 Special mention 67,240 48,480 64,704 42,910 22,595 2,973 44,751 293,653 Substandard 65,282 23,022 24,126 97,292 21,116 58,404 71,568 360,810 Non-accrual 13,097 189 6,807 391 502 3,743 25 24,754 Total Commercial loans: $ 3,992,080 $ 2,034,638 $ 927,791 $ 714,477 $ 545,687 $ 547,950 $ 1,831,176 $ 10,593,799
Risk Category of Loans in Personal Banking Portfolio	The credit quality of Personal Banking loans is monitored primarily on the basis of aging/delinquency, and this information is provided as of June 30, 2021 and December 31, 2020 below: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total June 30, 2021 Real estate-personal Current to 90 days past due $ 366,723 $ 1,002,972 $ 409,449 $ 183,822 $ 170,790 $ 645,716 $ 9,346 $ 2,788,818 Over 90 days past due — 701 — 171 628 1,223 — 2,723 Non-accrual — 19 186 113 — 1,354 — 1,672 Total Real estate-personal: $ 366,723 $ 1,003,692 $ 409,635 $ 184,106 $ 171,418 $ 648,293 $ 9,346 $ 2,793,213 Consumer Current to 90 days past due $ 311,909 $ 440,654 $ 255,969 $ 115,496 $ 75,121 $ 113,662 $ 734,619 $ 2,047,430 Over 90 days past due 24 175 96 206 69 398 768 1,736 Total Consumer: $ 311,933 $ 440,829 $ 256,065 $ 115,702 $ 75,190 $ 114,060 $ 735,387 $ 2,049,166 Revolving home equity Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 282,794 $ 282,794 Over 90 days past due — — — — — — 774 774 Total Revolving home equity: $ — $ — $ — $ — $ — $ — $ 283,568 $ 283,568 Consumer credit card Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 581,554 $ 581,554 Over 90 days past due — — — — — — 4,804 4,804 Total Consumer credit card: $ — $ — $ — $ — $ — $ — $ 586,358 $ 586,358 Overdrafts Current to 90 days past due $ 2,978 $ — $ — $ — $ — $ — $ — $ 2,978 Total Overdrafts: $ 2,978 $ — $ — $ — $ — $ — $ — $ 2,978 Personal banking loans Current to 90 days past due $ 681,610 $ 1,443,626 $ 665,418 $ 299,318 $ 245,911 $ 759,378 $ 1,608,313 $ 5,703,574 Over 90 days past due 24 876 96 377 697 1,621 6,346 10,037 Non-accrual — 19 186 113 — 1,354 — 1,672 Total Personal banking loans: $ 681,634 $ 1,444,521 $ 665,700 $ 299,808 $ 246,608 $ 762,353 $ 1,614,659 $ 5,715,283 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total December 31, 2020 Real estate-personal Current to 90 days past due $ 1,123,918 $ 488,379 $ 218,390 $ 201,971 $ 227,265 $ 544,008 $ 11,476 $ 2,815,407 Over 90 days past due 534 375 281 411 388 848 — 2,837 Non-accrual 29 191 116 45 65 1,340 — 1,786 Total Real estate-personal: $ 1,124,481 $ 488,945 $ 218,787 $ 202,427 $ 227,718 $ 546,196 $ 11,476 $ 2,820,030 Consumer Current to 90 days past due $ 536,799 $ 337,431 $ 161,337 $ 115,886 $ 75,769 $ 86,831 $ 633,186 $ 1,947,239 Over 90 days past due 212 358 328 220 174 397 1,574 3,263 Total Consumer: $ 537,011 $ 337,789 $ 161,665 $ 116,106 $ 75,943 $ 87,228 $ 634,760 $ 1,950,502 Revolving home equity Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 306,693 $ 306,693 Over 90 days past due — — — — — — 390 390 Total Revolving home equity: $ — $ — $ — $ — $ — $ — $ 307,083 $ 307,083 Consumer credit card Current to 90 days past due $ — $ — $ — $ — $ — $ — $ 642,860 $ 642,860 Over 90 days past due — — — — — — 12,218 12,218 Total Consumer credit card: $ — $ — $ — $ — $ — $ — $ 655,078 $ 655,078 Overdrafts Current to 90 days past due $ 3,149 $ — $ — $ — $ — $ — $ — $ 3,149 Total Overdrafts: $ 3,149 $ — $ — $ — $ — $ — $ — $ 3,149 Personal banking loans Current to 90 days past due $ 1,663,866 $ 825,810 $ 379,727 $ 317,857 $ 303,034 $ 630,839 $ 1,594,215 $ 5,715,348 Over 90 days past due 746 733 609 631 562 1,245 14,182 18,708 Non-accrual 29 191 116 45 65 1,340 — 1,786 Total Personal banking loans: $ 1,664,641 $ 826,734 $ 380,452 $ 318,533 $ 303,661 $ 633,424 $ 1,608,397 $ 5,735,842
Amortized Cost Basis of Collateral-Dependent Loans	The following table presents the amortized cost basis of collateral-dependent loans as of June 30, 2021 and December 31, 2020. (In thousands) Business Assets Business Real Estate Oil & Gas Assets Total June 30, 2021 Commercial: Business $ — $ — $ 2,578 $ 2,578 Total $ — $ — $ 2,578 $ 2,578 December 31, 2020 Commercial: Business $ 13,109 $ — $ 2,695 $ 15,804 Real estate - business — 986 — 986 Total $ 13,109 $ 986 $ 2,695 $ 16,790
Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding	For the remainder of loans in the Personal Banking portfolio, the table below shows the percentage of balances outstanding at June 30, 2021 and December 31, 2020 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card June 30, 2021 FICO score: Under 600 .8 % 1.7 % 1.2 % 3.4 % 600 - 659 1.8 3.6 1.8 11.1 660 - 719 7.7 13.5 8.5 30.8 720 - 779 23.4 23.9 22.9 28.5 780 and over 66.3 57.3 65.6 26.2 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2020 FICO score: Under 600 .8 % 2.3 % 1.3 % 5.0 % 600 - 659 1.9 4.2 2.4 12.3 660 - 719 8.8 14.1 8.6 31.2 720 - 779 24.5 23.9 22.2 28.0 780 and over 64.0 55.5 65.5 23.5 Total 100.0 % 100.0 % 100.0 % 100.0 %
Additional Information about Troubled Debt Restructurings	(In thousands) June 30, 2021 December 31, 2020 Accruing restructured loans: Commercial $ 97,761 $ 117,740 Assistance programs 7,301 7,804 Consumer bankruptcy 2,554 2,841 Other consumer 2,484 2,353 Non-accrual loans 8,319 9,889 Total troubled debt restructurings $ 118,419 $ 140,627
Outstanding Balance Of Loans Classified As Troubled Debt Restructurings	The table below shows the balance of troubled debt restructurings by loan classification at June 30, 2021, in addition to the outstanding balances of these restructured loans which the Company considers to have been in default at any time during the past twelve months. For purposes of this disclosure, the Company considers "default" to mean 90 days or more past due as to interest or principal. (In thousands) June 30, 2021 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 40,947 $ 577 Real estate - construction and land 10,105 — Real estate - business 53,734 — Personal Banking: Real estate - personal 3,258 316 Consumer 3,222 230 Revolving home equity 25 — Consumer credit card 7,128 378 Total troubled debt restructurings $ 118,419 $ 1,501

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2021
Investment Securities [Abstract]
Summary Investment Holdings	(In thousands) June 30, 2021 December 31, 2020 Available for sale debt securities $ 13,291,506 $ 12,449,264 Trading debt securities 29,002 35,321 Equity securities: Readily determinable fair value 6,981 2,966 No readily determinable fair value 1,697 1,397 Other: Federal Reserve Bank stock 34,222 34,070 Federal Home Loan Bank stock 10,135 10,307 Equity method investments 15,836 18,000 Private equity investments 116,246 94,368 Total investment securities (1) $ 13,505,625 $ 12,645,693 (1) Accrued interest receivable totaled $39.7 million and $41.5 million at June 30, 2021 and December 31, 2020, respectively,
Summary Of Available For Sale Investment Securities By Maturity Groupings	A summary of the available for sale debt securities by maturity groupings as of June 30, 2021 is shown below. The investment portfolio includes agency mortgage-backed securities, which are guaranteed by agencies such as the FHLMC, FNMA, and GNMA, in addition to non- agency mortgage-backed securities, which have no guarantee but are collateralized by commercial and residential mortgages. Also included are certain other asset-backed securities, which are primarily collateralized by credit cards, automobiles, student loans, and commercial loans. These securities differ from traditional debt securities primarily in that they may have uncertain maturity dates and are priced based on estimated prepayment rates on the underlying collateral. (In thousands) Amortized Fair U.S. government and federal agency obligations: Within 1 year $ 29,454 $ 30,159 After 1 but within 5 years 500,689 529,808 After 5 but within 10 years 194,424 220,185 Total U.S. government and federal agency obligations 724,567 780,152 Government-sponsored enterprise obligations: After 10 years 50,788 52,978 Total government-sponsored enterprise obligations 50,788 52,978 State and municipal obligations: Within 1 year 140,856 141,924 After 1 but within 5 years 808,293 840,159 After 5 but within 10 years 655,198 674,067 After 10 years 396,484 395,880 Total state and municipal obligations 2,000,831 2,052,030 Mortgage and asset-backed securities: Agency mortgage-backed securities 5,995,967 6,071,295 Non-agency mortgage-backed securities 825,175 825,608 Asset-backed securities 2,870,004 2,891,799 Total mortgage and asset-backed securities 9,691,146 9,788,702 Other debt securities: Within 1 year 93,051 94,391 After 1 but within 5 years 239,124 245,719 After 5 but within 10 years 258,100 258,294 After 10 years 19,435 19,240 Total other debt securities 609,710 617,644 Total available for sale debt securities $ 13,077,042 $ 13,291,506
Securities With Unrealized Losses And Length Of Impairment Period	Less than 12 months 12 months or longer Total (In thousands) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized June 30, 2021 Government-sponsored enterprise obligations $ 19,506 $ 312 $ — $ — $ 19,506 $ 312 State and municipal obligations 454,235 5,130 1,453 7 455,688 5,137 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,326,148 26,833 17,535 180 2,343,683 27,013 Non-agency mortgage-backed securities 364,857 1,407 — — 364,857 1,407 Asset-backed securities 580,334 1,714 129,636 882 709,970 2,596 Total mortgage and asset-backed securities 3,271,339 29,954 147,171 1,062 3,418,510 31,016 Other debt securities 229,295 4,320 — — 229,295 4,320 Total $ 3,974,375 $ 39,716 $ 148,624 $ 1,069 $ 4,122,999 $ 40,785 December 31, 2020 Government-sponsored enterprise obligations $ 19,720 $ 98 $ — $ — $ 19,720 $ 98 State and municipal obligations 45,622 230 — — 45,622 230 Mortgage and asset-backed securities: Agency mortgage-backed securities 470,373 2,802 — — 470,373 2,802 Non-agency mortgage-backed securities 112,861 380 — — 112,861 380 Asset-backed securities 21,360 56 253,734 2,617 275,094 2,673 Total mortgage and asset-backed securities 604,594 3,238 253,734 2,617 858,328 5,855 Other debt securities 24,522 175 — — 24,522 175 Total $ 694,458 $ 3,741 $ 253,734 $ 2,617 $ 948,192 $ 6,358
Available For Sale Securities Unrealized Gains And Losses By Security Type	For debt securities classified as available for sale, the following tables show the amortized cost, fair value, and allowance for credit losses of securities available for sale at June 30, 2021 and December 31, 2020, and the corresponding amounts of gross unrealized gains and losses (pre-tax) in AOCI, by security type. (In thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value June 30, 2021 U.S. government and federal agency obligations $ 724,567 $ 55,585 $ — $ — $ 780,152 Government-sponsored enterprise obligations 50,788 2,502 (312) — 52,978 State and municipal obligations 2,000,831 56,336 (5,137) — 2,052,030 Mortgage and asset-backed securities: Agency mortgage-backed securities 5,995,967 102,341 (27,013) — 6,071,295 Non-agency mortgage-backed securities 825,175 1,840 (1,407) — 825,608 Asset-backed securities 2,870,004 24,391 (2,596) — 2,891,799 Total mortgage and asset-backed securities 9,691,146 128,572 (31,016) — 9,788,702 Other debt securities 609,710 12,254 (4,320) — 617,644 Total $ 13,077,042 $ 255,249 $ (40,785) $ — $ 13,291,506 December 31, 2020 U.S. government and federal agency obligations $ 775,592 $ 62,467 $ — $ — $ 838,059 Government-sponsored enterprise obligations 50,803 3,780 (98) — 54,485 State and municipal obligations 1,968,006 77,323 (230) — 2,045,099 Mortgage and asset-backed securities: Agency mortgage-backed securities 6,557,098 157,789 (2,802) — 6,712,085 Non-agency mortgage-backed securities 358,074 3,380 (380) — 361,074 Asset-backed securities 1,853,791 31,125 (2,673) — 1,882,243 Total mortgage and asset-backed securities 8,768,963 192,294 (5,855) — 8,955,402 Other debt securities 534,169 22,225 (175) — 556,219 Total $ 12,097,533 $ 358,089 $ (6,358) $ — $ 12,449,264
Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses	The following tables present proceeds from sales of securities and the components of investment securities gains and losses which have been recognized in earnings. For the Six Months Ended June 30 (In thousands) 2021 2020 Proceeds from sales of securities: Available for sale debt securities $ — $ 174,595 Equity securities — 2 Other 10,060 — Total proceeds $ 10,060 $ 174,597 Investment securities gains (losses), net: Available for sale debt securities: Gains realized on sales $ — $ 3,291 Equity securities: Gains realized on sales — 2 Fair value adjustments, net 15 (218) Other: Gains realized on sales 1,611 — Fair value adjustments, net 25,031 (20,505) Total investment securities gains (losses), net $ 26,657 $ (17,430)

Goodwill And Other Intangible_2

Goodwill And Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule Of Intangible Assets With Estimable Useful Lives	The following table presents information about the Company's intangible assets which have estimable useful lives. June 30, 2021 December 31, 2020 (In thousands) Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Amortizable intangible assets: Core deposit premium $ 31,270 $ (30,098) $ — $ 1,172 $ 31,270 $ (29,912) $ — $ 1,358 Mortgage servicing rights 18,576 (8,396) (804) 9,376 15,238 (6,886) (2,103) 6,249 Total $ 49,846 $ (38,494) $ (804) $ 10,548 $ 46,508 $ (36,798) $ (2,103) $ 7,607
Schedule of Estimated Annual Amortization Expense	The following table shows the estimated annual amortization expense for the next five fiscal years. This expense is based on existing asset balances and the interest rate environment as of June 30, 2021. The Company’s actual amortization expense in any given period may be different from the estimated amounts depending upon the acquisition of intangible assets, changes in mortgage interest rates, prepayment rates and other market conditions. (In thousands) 2021 $ 2,661 2022 1,646 2023 1,377 2024 1,149 2025 952
Schedule Of Changes In Carrying Amount Of Goodwill And Net Other Intangible Assets	Changes in the carrying amount of goodwill and net other intangible assets for the six month period ended June 30, 2021 are as follows: (In thousands) Goodwill Easement Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2021 $ 138,921 $ 3,600 $ 1,358 $ 6,249 Originations — — — 3,338 Amortization — — (186) (1,510) Impairment reversal — — — 1,299 Balance June 30, 2021 $ 138,921 $ 3,600 $ 1,172 $ 9,376
Schedule Of Goodwill Allocated By Operating Segments	Goodwill allocated to the Company’s operating segments at June 30, 2021 and December 31, 2020 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Lessor, Components of Lease Income [Table Text Block]	The following table provides the components of lease income. For the Three Months Ended June 30 For the Six Months Ended June 30 (in thousands) 2021 2020 2021 2020 Direct financing and sales-type leases $ 5,795 $ 6,304 $ 11,916 $ 12,662 Operating leases (a) 1,930 2,160 4,004 4,221 Total lease income $ 7,725 $ 8,464 $ 15,920 $ 16,883 (a) Includes rent from Tower Properties Company, a related party, of $19 thousand for the three month periods ended June 30, 2021 and 2020, and $38 thousand for the six months ended June 30, 2021 and 2020.

Pension (Tables)

Pension (Tables)	6 Months Ended
	Jun. 30, 2021
Pension [Abstract]
Net Pension Cost	The amount of net pension cost is shown in the table below: For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2021 2020 2021 2020 Service cost - benefits earned during the period $ 94 $ 101 $ 189 $ 202 Interest cost on projected benefit obligation 556 823 1,112 1,645 Expected return on plan assets (1,124) (1,297) (2,248) (2,594) Amortization of prior service cost (68) (68) (136) (136) Amortization of unrecognized net loss 651 542 1,302 1,084 Net periodic pension cost $ 109 $ 101 $ 219 $ 201

Common Stock (Tables)

Common Stock (Tables)	6 Months Ended
	Jun. 30, 2021
Common Stock [Abstract]
Summary Of Components Used To Calculate Basic And Diluted Income Per Share	Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that pay nonforfeitable common stock dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 13. For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands, except per share data) 2021 2020 2021 2020 Basic income per common share: Net income attributable to Commerce Bancshares, Inc. $ 162,326 $ 39,863 $ 293,298 $ 91,720 Less preferred stock dividends — 2,250 — 4,500 Net income available to common shareholders 162,326 37,613 293,298 87,220 Less income allocated to nonvested restricted stock 1,478 353 2,678 823 Net income allocated to common stock $ 160,848 $ 37,260 $ 290,620 $ 86,397 Weighted average common shares outstanding 116,163 116,242 116,211 116,458 Basic income per common share $ 1.38 $ .32 $ 2.50 $ .74 Diluted income per common share: Net income available to common shareholders $ 162,326 $ 37,613 $ 293,298 $ 87,220 Less income allocated to nonvested restricted stock 1,475 354 2,673 823 Net income allocated to common stock $ 160,851 $ 37,259 $ 290,625 $ 86,397 Weighted average common shares outstanding 116,163 116,242 116,211 116,458 Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods 287 200 301 235 Weighted average diluted common shares outstanding 116,450 116,442 116,512 116,693 Diluted income per common share $ 1.38 $ .32 $ 2.49 $ .74

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The table below shows the activity and accumulated balances for components of other comprehensive income. The largest component is the unrealized holding gains and losses on available for sale debt securities. Another component is the amortization from other comprehensive income of losses associated with pension benefits, which occurs as the losses are included in current net periodic pension cost. The remaining component is gains and losses in fair value on certain interest rate floors that have been designated as cash flow hedging instruments. The interest rate floors were terminated during 2020, and the realized gains will be amortized into interest income through the original maturity dates of the interest rate floors. Information about unrealized gains and losses on securities can be found in Note 3, and information about unrealized gains and losses on cash flow hedge derivatives is located in Note 11. Unrealized Gains (Losses) on Securities (1) Pension Loss Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2) Total Accumulated Other Comprehensive Income (Loss) (In thousands) Balance January 1, 2021 $ 263,801 $ (25,118) $ 92,694 $ 331,377 Other comprehensive loss before reclassifications to current earnings (137,270) — — (137,270) Amounts reclassified to current earnings from accumulated other comprehensive income — 1,166 (11,881) (10,715) Current period other comprehensive income (loss), before tax (137,270) 1,166 (11,881) (147,985) Income tax (expense) benefit 34,319 (291) 2,970 36,998 Current period other comprehensive income (loss), net of tax (102,951) 875 (8,911) (110,987) Balance June 30, 2021 $ 160,850 $ (24,243) $ 83,783 $ 220,390 Balance January 1, 2020 $ 102,073 $ (21,940) $ 30,311 $ 110,444 Other comprehensive income before reclassifications to current earnings 223,470 — 99,183 322,653 Amounts reclassified to current earnings from accumulated other comprehensive income (3,292) 948 (1,887) (4,231) Current period other comprehensive income, before tax 220,178 948 97,296 318,422 Income tax expense (55,044) (237) (24,324) (79,605) Current period other comprehensive income, net of tax 165,134 711 72,972 238,817 Balance June 30, 2020 $ 267,207 $ (21,229) $ 103,283 $ 349,261 (1) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains (losses), net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Schedule Of Financial Information By Segment	The following table presents selected financial information by segment and reconciliations of combined segment totals to consolidated totals. There were no material intersegment revenues between the three segments. Management periodically makes changes to methods of assigning costs and income to its business segments to better reflect operating results. If appropriate, these changes are reflected in prior year information presented below. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended June 30, 2021 Net interest income $ 80,809 $ 114,640 $ 17,654 $ 213,103 $ (5,121) $ 207,982 Provision for credit losses (5,664) 4,952 (4) (716) 46,371 45,655 Non-interest income 36,905 52,259 52,505 141,669 (2,526) 139,143 Investment securities gains, net — — — — 16,804 16,804 Non-interest expense (73,949) (82,617) (34,048) (190,614) (7,512) (198,126) Income before income taxes $ 38,101 $ 89,234 $ 36,107 $ 163,442 $ 48,016 $ 211,458 Six Months Ended June 30, 2021 Net interest income $ 158,748 $ 224,809 $ 35,111 $ 418,668 $ (4,938) $ 413,730 Provision for credit losses (15,565) 4,925 1 (10,639) 62,526 51,887 Non-interest income 75,153 102,987 103,490 281,630 (6,442) 275,188 Investment securities gains, net — — — — 26,657 26,657 Non-interest expense (144,453) (161,898) (67,091) (373,442) (17,257) (390,699) Income before income taxes $ 73,883 $ 170,823 $ 71,511 $ 316,217 $ 60,546 $ 376,763 Three Months Ended June 30, 2020 Net interest income $ 81,270 $ 102,878 $ 13,424 $ 197,572 $ 5,485 $ 203,057 Provision for loan losses (5,025) (3,278) — (8,303) (72,236) (80,539) Non-interest income 36,293 45,939 44,590 126,822 (9,307) 117,515 Investment securities losses, net — — — — (4,129) (4,129) Non-interest expense (75,304) (78,230) (30,213) (183,747) (3,765) (187,512) Income before income taxes $ 37,234 $ 67,309 $ 27,801 $ 132,344 $ (83,952) $ 48,392 Six Months Ended June 30, 2020 Net interest income $ 160,251 $ 188,774 $ 26,383 $ 375,408 $ 28,714 $ 404,122 Provision for credit losses (16,231) (2,922) (3) (19,156) (119,336) (138,492) Non-interest income 70,374 95,826 91,999 258,199 (17,021) 241,178 Investment securities losses, net — — — — (17,430) (17,430) Non-interest expense (152,716) (159,050) (61,982) (373,748) (7,462) (381,210) Income before income taxes $ 61,678 $ 122,628 $ 56,397 $ 240,703 $ (132,535) $ 108,168

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2021
Derivative Instrument Detail [Abstract]
Schedule Of Notional Amounts Of Derivative Instruments	(In thousands) June 30, 2021 December 31, 2020 Interest rate swaps $ 2,270,249 $ 2,367,017 Interest rate caps 185,643 103,028 Credit risk participation agreements 386,484 381,170 Foreign exchange contracts 4,662 7,431 Mortgage loan commitments 59,054 67,543 Mortgage loan forward sale contracts 8,701 — Forward TBA contracts 62,500 89,000 Total notional amount $ 2,977,293 $ 3,015,189
Schedule Of Fair Values Of Derivative Instruments	The fair values of the Company's derivative instruments, whose notional amounts are listed above, are shown in the table below. Information about the valuation methods used to determine fair value is provided in Note 17 on Fair Value Measurements in the 2020 Annual Report on Form 10-K. The Company's policy is to present its derivative assets and derivative liabilities on a gross basis in its consolidated balance sheets and these are reported in other assets and other liabilities. Certain collateral posted to and from the Company's clearing counterparty has been applied to the fair values of the cleared swaps, such that at June 30, 2021 in the table below, the positive fair values of cleared swaps were reduced by $207 thousand and the negative fair values of cleared swaps were reduced by $46.6 million. At December 31, 2020, there were no reductions to the positive fair values of cleared swaps and the negative fair values of cleared swaps were reduced by $69.2 million. Asset Derivatives Liability Derivatives June 30, 2021 Dec. 31, 2020 June 30, 2021 Dec. 31, 2020 (In thousands ) Fair Value Fair Value Derivative instruments: Interest rate swaps $ 59,170 $ 86,389 $ (12,793) $ (17,199) Interest rate caps 94 1 (94) (1) Credit risk participation agreements 142 216 (333) (701) Foreign exchange contracts 62 57 (43) (103) Mortgage loan commitments 1,820 3,226 — — Mortgage loan forward sale contracts 29 — (1) — Forward TBA contracts 41 — (85) (671) Total $ 61,358 $ 89,889 $ (13,349) $ (18,675)
Summary of Cash Flow Hedge Activity [Table Text Block]	The pre-tax effects of derivative instruments on the consolidated statements of income are shown in the tables below. Amount of Gain or (Loss) Recognized in OCI Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income (In thousands) Total Included Component Excluded Component Total Included Component Excluded Component For the Three Months Ended June 30, 2020 Derivatives in cash flow hedging relationships: Interest rate floors $ 14,566 $ 18,087 $ (3,521) Interest and fees on loans $ 2,155 $ 3,186 $ (1,031) Total $ 14,566 $ 18,087 $ (3,521) Total $ 2,155 $ 3,186 $ (1,031) For the Six Months Ended June 30, 2020 Derivatives in cash flow hedging relationships: Interest rate floors $ 99,183 $ 125,708 $ (26,525) Interest and fees on loans $ 1,887 $ 3,949 $ (2,062) Total $ 99,183 $ 125,708 $ (26,525) Total $ 1,887 $ 3,949 $ (2,062)
Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income	Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2021 2020 2021 2020 Derivative instruments: Interest rate swaps Other non-interest income $ 875 $ 22 $ 1,950 $ 288 Interest rate caps Other non-interest income — — 15 19 Credit risk participation agreements Other non-interest income (385) 267 (20) 240 Foreign exchange contracts Other non-interest income (12) (44) 84 (82) Mortgage loan commitments Loan fees and sales (35) 2,548 (1,407) 2,089 Mortgage loan forward sale contracts Loan fees and sales (11) 3 28 (1) Forward TBA contracts Loan fees and sales (1,046) (153) 1,860 227 Total $ (614) $ 2,643 $ 2,510 $ 2,780
Balance Sheet Offsetting, Derivatives [Table Text Block]	Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Collateral Received/Pledged Net Amount June 30, 2021 Assets: Derivatives subject to master netting agreements $ 59,371 $ — $ 59,371 $ (187) $ — $ 59,184 Derivatives not subject to master netting agreements 1,987 — 1,987 Total derivatives $ 61,358 $ — $ 61,358 Liabilities: Derivatives subject to master netting agreements $ 13,237 $ — $ 13,237 $ (187) $ (11,896) $ 1,154 Derivatives not subject to master netting agreements 112 — 112 Total derivatives $ 13,349 $ — $ 13,349 December 31, 2020 Assets: Derivatives subject to master netting agreements $ 86,497 $ — $ 86,497 $ (108) $ — $ 86,389 Derivatives not subject to master netting agreements 3,392 — 3,392 Total derivatives $ 89,889 $ — $ 89,889 Liabilities: Derivatives subject to master netting agreements $ 18,420 $ — $ 18,420 $ (108) $ (16,738) $ 1,574 Derivatives not subject to master netting agreements 255 — 255 Total derivatives $ 18,675 $ — $ 18,675

Resale and Repurchase Agreeme_2

Resale and Repurchase Agreements (Tables)	6 Months Ended
	Jun. 30, 2021
Resale and Repurchase Agreements [Abstract]
Resale and Repurchase Agreements [Table Text Block]	Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Securities Collateral Received/Pledged Net Amount June 30, 2021 Total resale agreements, subject to master netting arrangements $ 1,500,000 $ (200,000) $ 1,300,000 $ — $ (1,300,000) $ — Total repurchase agreements, subject to master netting arrangements 2,505,893 (200,000) 2,305,893 — (2,305,893) — December 31, 2020 Total resale agreements, subject to master netting arrangements $ 1,050,000 $ (200,000) $ 850,000 $ — $ (850,000) $ — Total repurchase agreements, subject to master netting arrangements 2,256,113 (200,000) 2,056,113 — (2,056,113) —
Schedule of Underlying Assets of Repurchase Agreements [Table Text Block]	Remaining Contractual Maturity of the Agreements (In thousands) Overnight and continuous Up to 90 days Greater than 90 days Total June 30, 2021 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 215,729 $ 31,799 $ 8,059 $ 255,587 Agency mortgage-backed securities 1,712,923 54,972 222,475 1,990,370 Non-agency mortgage-backed securities 42,656 — — 42,656 Asset-backed securities 183,979 — — 183,979 Other debt securities 33,301 — — 33,301 Total repurchase agreements, gross amount recognized $ 2,188,588 $ 86,771 $ 230,534 $ 2,505,893 December 31, 2020 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 150,305 $ — $ — $ 150,305 Agency mortgage-backed securities 1,598,614 34,018 220,849 1,853,481 Non-agency mortgage-backed securities 62,742 — — 62,742 Asset-backed securities 155,917 — — 155,917 Other debt securities 33,668 — — 33,668 Total repurchase agreements, gross amount recognized $ 2,001,246 $ 34,018 $ 220,849 $ 2,256,113

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Summary Of The Status Of Nonvested Share Awards	A summary of the status of the Company’s nonvested share awards as of June 30, 2021, and changes during the six month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2021 1,099,866 $52.11 Granted 202,202 72.09 Vested (227,590) 43.30 Forfeited (12,982) 56.84 Nonvested at June 30, 2021 1,061,496 $57.74
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The current year per share average fair value and the model assumptions are shown in the table below. Weighted per share average fair value at grant date $16.78 Assumptions: Dividend yield 1.4 % Volatility 28.2 % Risk-free interest rate .7 % Expected term 5.7 years
Summary Of SAR Activity	A summary of SAR activity during the first six months of 2021 is presented below. (Dollars in thousands, except per share data) Rights Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2021 1,005,896 $44.95 Granted 72,416 72.91 Forfeited (3,906) 59.19 Expired (280) 57.95 Exercised (214,271) 39.59 Outstanding at June 30, 2021 859,855 $48.57 6.3 years $ 22,356

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table disaggregates non-interest income subject to ASU 2014-09 by major product line. Three Months Ended June 30 Six Months Ended June 30 (In thousands) 2021 2020 2021 2020 Bank card transaction fees $ 42,608 $ 33,745 $ 80,303 $ 73,945 Trust fees 46,257 37,942 90,384 77,907 Deposit account charges and other fees 23,988 22,279 46,563 45,956 Consumer brokerage services 4,503 3,011 8,584 7,088 Other non-interest income 6,962 7,443 14,658 16,152 Total non-interest income from contracts with customers 124,318 104,420 240,492 221,048 Other non-interest income (1) 14,825 13,095 34,696 20,130 Total non-interest income $ 139,143 $ 117,515 $ 275,188 $ 241,178 (1) This revenue is not within the scope of ASU 2014-09, and includes fees relating to capital market activities, loan fees and sales, derivative instruments, standby letters of credit and various other transactions.
Contract with Customer, Asset and Liability [Table Text Block]	The following table presents the opening and closing receivable balances for the six month periods ended June 30, 2021 and 2020 for the Company’s significant revenue categories subject to ASU 2014-09. (In thousands) June 30, 2021 December 31, 2020 June 30, 2020 December 31, 2019 Bank card transaction fees $ 13,248 $ 14,199 $ 10,655 $ 13,915 Trust fees 2,253 2,071 2,147 2,093 Deposit account charges and other fees 6,616 6,933 6,564 6,523 Consumer brokerage services 355 432 476 596

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Measurements [Abstract]
Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The table below presents the June 30, 2021 and December 31, 2020 carrying values of assets and liabilities measured at fair value on a recurring basis. There were no transfers among levels during the first six months of 2021 or the year ended December 31, 2020. Fair Value Measurements Using (In thousands) Total Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs June 30, 2021 Assets: Residential mortgage loans held for sale $ 17,374 $ — $ 17,374 $ — Available for sale debt securities: U.S. government and federal agency obligations 780,152 780,152 — — Government-sponsored enterprise obligations 52,978 — 52,978 — State and municipal obligations 2,052,030 — 2,044,039 7,991 Agency mortgage-backed securities 6,071,295 — 6,071,295 — Non-agency mortgage-backed securities 825,608 — 825,608 — Asset-backed securities 2,891,799 — 2,891,799 — Other debt securities 617,644 — 617,644 — Trading debt securities 29,002 — 29,002 — Equity securities 6,981 6,981 — — Private equity investments 116,246 — — 116,246 Derivatives * 61,358 — 59,396 1,962 Assets held in trust for deferred compensation plan 20,969 20,969 — — Total assets 13,543,436 808,102 12,609,135 126,199 Liabilities: Derivatives * 13,349 — 13,016 333 Liabilities held in trust for deferred compensation plan 20,969 20,969 — — Total liabilities $ 34,318 $ 20,969 $ 13,016 $ 333 December 31, 2020 Assets: Residential mortgage loans held for sale $ 39,396 $ — $ 39,396 $ — Available for sale debt securities: U.S. government and federal agency obligations 838,059 838,059 — — Government-sponsored enterprise obligations 54,485 — 54,485 — State and municipal obligations 2,045,099 — 2,037,131 7,968 Agency mortgage-backed securities 6,712,085 — 6,712,085 — Non-agency mortgage-backed securities 361,074 — 361,074 — Asset-backed securities 1,882,243 — 1,882,243 — Other debt securities 556,219 — 556,219 — Trading debt securities 35,321 — 35,321 — Equity securities 2,966 2,966 — — Private equity investments 94,368 — — 94,368 Derivatives * 89,889 — 86,447 3,442 Assets held in trust for deferred compensation plan 19,278 19,278 — — Total assets 12,730,482 860,303 11,764,401 105,778 Liabilities: Derivatives * 18,675 — 17,974 701 Liabilities held in trust for deferred compensation plan 19,278 19,278 — — Total liabilities $ 37,953 $ 19,278 $ 17,974 $ 701 * The fair value of each class of derivative is shown in Note 11.
Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are summarized as follows: Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (In thousands) State and Municipal Obligations Private Equity Investments Derivatives Total For the three months ended June 30, 2021 Balance March 31, 2021 $ 7,970 $ 94,257 $ 1,636 $ 103,863 Total gains or losses (realized/unrealized): Included in earnings — 16,666 (420) 16,246 Included in other comprehensive income * 18 — — 18 Discount accretion 3 — — 3 Purchases of private equity investments — 5,656 — 5,656 Sale/pay down of private equity investments — (356) — (356) Capitalized interest/dividends — 23 — 23 Purchase of risk participation agreement — — 445 445 Sale of risk participation agreements — — (32) (32) Balance June 30, 2021 $ 7,991 $ 116,246 $ 1,629 $ 125,866 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ — $ 16,666 $ 1,434 $ 18,100 Total gains or losses for the three months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 18 $ — $ — $ 18 For the six months ended June 30, 2021 Balance January 1, 2021 $ 7,968 $ 94,368 $ 2,741 $ 105,077 Total gains or losses (realized/unrealized): Included in earnings — 25,031 (1,427) 23,604 Included in other comprehensive income * 17 — — 17 Discount accretion 6 — — 6 Purchases of private equity investments — 5,656 — 5,656 Sale/pay down of private equity investments — (8,832) — (8,832) Capitalized interest/dividends — 23 — 23 Purchase of risk participation agreement — — 445 445 Sale of risk participation agreement — — (130) (130) Balance June 30, 2021 $ 7,991 $ 116,246 $ 1,629 $ 125,866 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ — $ 25,031 $ 1,629 $ 26,660 Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 17 $ — $ — $ 17 Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (In thousands) State and Municipal Obligations Private Equity Investments Derivatives Total For the three months ended June 30, 2020 Balance March 31, 2020 $ 8,362 $ 81,159 $ (557) $ 88,964 Total gains or losses (realized/unrealized): Included in earnings — (7,497) 2,814 (4,683) Included in other comprehensive income * 1,123 — — 1,123 Discount accretion 5 — — 5 Purchases of private equity investments — 155 — 155 Capitalized interest/dividends — 29 — 29 Sale of risk participation agreement — — (369) (369) Balance June 30, 2020 $ 9,490 $ 73,846 $ 1,888 $ 85,224 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ — $ (7,497) $ 2,815 $ (4,682) Total gains or losses for the three months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ 1,123 $ — $ — $ 1,123 For the six months ended June 30, 2020 Balance January 1, 2020 $ 9,853 $ 94,122 $ 369 $ 104,344 Total gains or losses (realized/unrealized): Included in earnings — (20,505) 2,328 (18,177) Included in other comprehensive income * (372) — — (372) Discount accretion 9 — — 9 Purchases of private equity investments — 269 — 269 Sale/pay down of private equity investments — (69) — (69) Capitalized interest/dividends — 29 — 29 Sale of risk participation agreement — — (809) (809) Balance June 30, 2020 $ 9,490 $ 73,846 $ 1,888 $ 85,224 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ — $ (20,505) $ 2,759 $ (17,746) Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2020 $ (372) $ — $ — $ (372) * Included in "net unrealized gains (losses) on other securities" in the consolidated statements of comprehensive income.
Summary Of Gains And Losses On Level 3 Assets And Liabilities	Gains and losses included in earnings for the Level 3 assets and liabilities in the previous table are reported in the following line items in the consolidated statements of income: (In thousands) Loan Fees and Sales Other Non-Interest Income Investment Securities Gains (Losses), Net Total For the three months ended June 30, 2021 Total gains or losses included in earnings $ (35) $ (385) $ 16,666 $ 16,246 Change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 1,820 $ (386) $ 16,666 $ 18,100 For the six months ended June 30, 2021 Total gains or losses included in earnings $ (1,407) $ (20) $ 25,031 $ 23,604 Change in unrealized gains or losses relating to assets still held at June 30, 2021 $ 1,820 $ (191) $ 25,031 $ 26,660 For the three months ended June 30, 2020 Total gains or losses included in earnings $ 2,547 $ 267 $ (7,497) $ (4,683) Change in unrealized gains or losses relating to assets still held at June 30, 2020 $ 2,547 $ 268 $ (7,497) $ (4,682) For the six months ended June 30, 2020 Total gains or losses included in earnings $ 2,088 $ 240 $ (20,505) $ (18,177) Change in unrealized gains or losses relating to assets still held at June 30, 2020 $ 2,547 $ 212 $ (20,505) $ (17,746)
Summary Of Quantitative Information About Level 3 Fair Value Measurements	The Company's significant Level 3 measurements, which employ unobservable inputs that are readily quantifiable, pertain to auction rate securities (ARS), investments in portfolio concerns held by the Company's private equity subsidiaries, and held for sale residential mortgage loan commitments. ARS are included in state and municipal securities and totaled $8.0 million at June 30, 2021, while private equity investments, included in other securities, totaled $116.2 million. Information about these inputs is presented in the table below. Quantitative Information about Level 3 Fair Value Measurements Weighted Valuation Technique Unobservable Input Range Average* Auction rate securities Discounted cash flow Estimated market recovery period 5 years 5 years Estimated market rate 1.1% - 1.4% 1.2% Private equity investments Market comparable companies EBITDA multiple 4.0 - 6.0 5.3 Mortgage loan commitments Discounted cash flow Probability of funding 68.3% - 100.0% 86.7% Embedded servicing value .7% - 1.1% 1.0% * Unobservable inputs were weighted by the relative fair value of the instruments.
Schedule Of Fair Value Disclosures Measured On Nonrecurring Basis [Table Text Block]	For assets measured at fair value on a nonrecurring basis during the first six months of 2021 and 2020, and still held as of June 30, 2021 and 2020, the following table provides the adjustments to fair value recognized during the respective periods, the level of valuation inputs used to determine each adjustment, and the carrying value of the related individual assets or portfolios at June 30, 2021 and 2020. Fair Value Measurements Using (In thousands) Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Gains (Losses) Recognized During the Six Months Ended June 30 June 30, 2021 Mortgage servicing rights $ 9,376 $ — $ — $ 9,376 $ 1,299 Long-lived assets 984 — — 984 (276) June 30, 2020 Collateral dependent loans $ 12,066 $ — $ — $ 12,066 $ (3,079) Mortgage servicing rights 5,625 — — 5,625 (1,851) Long-lived assets 348 — — 348 (5)
Information about Level Three Fair Value Measurements - Nonrecurring Basis	The Company's significant Level 3 measurements that are measured on a nonrecurring basis pertain to the Company's mortgage servicing rights retained on certain fixed rate personal real estate loan originations. Mortgage servicing rights are included in other assets on the consolidated balance sheet, and information about these inputs is presented in the table below. Quantitative Information about Level 3 Fair Value Measurements Weighted Valuation Technique Unobservable Input Range Average* Mortgage servicing rights Discounted cash flow Discount rate 9.02 % - 9.34 % 9.17 % Prepayment speeds (CPR)* 10.46 % - 13.21 % 12.11 % Loan servicing costs - annually per loan Performing loans $ 70 - $ 72 $ 71 Delinquent loans $ 200 - $ 750 Loans in foreclosure $ 1,000 *Ranges and weighted averages based on interest rate tranches.

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Of Financial Instruments [Abstract]
Fair value of financial instruments [Table Text Block]	Carrying Amount Estimated Fair Value at June 30, 2021 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 5,803,760 $ — $ — $ 5,750,743 $ 5,750,743 Real estate - construction and land 1,103,661 — — 1,080,298 1,080,298 Real estate - business 3,017,560 — — 3,014,609 3,014,609 Real estate - personal 2,793,213 — — 2,796,020 2,796,020 Consumer 2,049,166 — — 2,048,176 2,048,176 Revolving home equity 283,568 — — 281,395 281,395 Consumer credit card 586,358 — — 542,235 542,235 Overdrafts 2,978 — — 2,789 2,789 Total loans 15,640,264 — — 15,516,265 15,516,265 Loans held for sale 23,697 — 23,697 — 23,697 Investment securities 13,488,092 787,133 12,532,365 168,594 13,488,092 Federal funds sold 5,945 5,945 — — 5,945 Securities purchased under agreements to resell 1,300,000 — — 1,320,677 1,320,677 Interest earning deposits with banks 2,161,644 2,161,644 — — 2,161,644 Cash and due from banks 358,122 358,122 — — 358,122 Derivative instruments 61,358 — 59,396 1,962 61,358 Assets held in trust for deferred compensation plan 20,969 20,969 — — 20,969 Total $ 33,060,091 $ 3,333,813 $ 12,615,458 $ 17,007,498 $ 32,956,769 Financial Liabilities Non-interest bearing deposits $ 11,085,286 $ 11,085,286 $ — $ — $ 11,085,286 Savings, interest checking and money market deposits 14,654,696 14,654,696 — — 14,654,696 Certificates of deposit 1,746,255 — — 1,748,788 1,748,788 Federal funds purchased 12,335 12,335 — — 12,335 Securities sold under agreements to repurchase 2,305,893 — — 2,305,957 2,305,957 Other borrowings 1,411 — 1,411 — 1,411 Derivative instruments 13,349 — 13,016 333 13,349 Liabilities held in trust for deferred compensation plan 20,969 20,969 — — 20,969 Total $ 29,840,194 $ 25,773,286 $ 14,427 $ 4,055,078 $ 29,842,791 Carrying Amount Estimated Fair Value at December 31, 2020 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 6,546,087 $ — $ — $ 6,467,572 $ 6,467,572 Real estate - construction and land 1,021,595 — — 995,873 995,873 Real estate - business 3,026,117 — — 3,016,576 3,016,576 Real estate - personal 2,820,030 — — 2,830,521 2,830,521 Consumer 1,950,502 — — 1,953,217 1,953,217 Revolving home equity 307,083 — — 304,434 304,434 Consumer credit card 655,078 — — 576,320 576,320 Overdrafts 3,149 — — 3,068 3,068 Total loans 16,329,641 — — 16,147,581 16,147,581 Loans held for sale 45,089 — 45,089 — 45,089 Investment securities 12,626,296 841,025 11,638,558 146,713 12,626,296 Securities purchased under agreements to resell 850,000 — — 894,338 894,338 Interest earning deposits with banks 1,747,363 1,747,363 — — 1,747,363 Cash and due from banks 437,563 437,563 — — 437,563 Derivative instruments 89,889 — 86,447 3,442 89,889 Assets held in trust for deferred compensation plan 19,278 19,278 — — 19,278 Total $ 32,145,119 $ 3,045,229 $ 11,770,094 $ 17,192,074 $ 32,007,397 Financial Liabilities Non-interest bearing deposits $ 10,497,598 $ 10,497,598 $ — $ — $ 10,497,598 Savings, interest checking and money market deposits 14,604,456 14,604,456 — — 14,604,456 Certificates of deposit 1,844,691 — — 1,847,277 1,847,277 Federal funds purchased 42,270 42,270 — — 42,270 Securities sold under agreements to repurchase 2,056,113 — — 2,056,173 2,056,173 Derivative instruments 18,675 — 17,974 701 18,675 Liabilities held in trust for deferred compensation plan 19,278 19,278 — — 19,278 Total $ 29,083,081 $ 25,163,602 $ 17,974 $ 3,904,151 $ 29,085,727

Loans And Allowance For Credi_3

Loans And Allowance For Credit Losses (Narrative) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Receivables [Abstract]
Accrued Interest Receivable	$ 37,200,000	$ 37,200,000	$ 41,900,000
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits	3,500,000,000	3,500,000,000
Loans Pledged to the Federal Reserve Bank as collateral for discount window borrowings	1,400,000,000	$ 1,400,000,000
Period after which loans are deemed in default (in days)		90 days
Effect on Interest Income Resulting From Modification to Credit Card Loans		$ (867,000)
Commitments to lend additional funds to customers with restructured loans	745,000	745,000
Letters of Credit to Customers with Substandard Risk Rating	24,000,000	24,000,000
Residential mortgage loans held for sale	17,374,000	17,374,000	39,396,000
Unpaid Principal Balance on Personal Real Estate Loans Held for Sale	16,900,000	16,900,000
Student Loans Held for Sale, Lower of Cost or Fair Value	6,300,000	6,300,000
HFS Loans on non accrual status	0	0
HFS loans past due and still accruing	0	0
Foreclosed real estate	229,000	229,000	93,000
Personal property acquired in repossession	1,100,000	1,100,000	1,400,000
Business
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Nonaccrual, No Allowance	8,000,000	8,000,000	$ 9,400,000
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Accrued Interest, Writeoff	36,000	161,000
Personal Banking Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Accrued Interest, Writeoff	$ 1,100,000	$ 3,100,000

Loans And Allowance For Credi_4

Loans And Allowance For Credit Losses (Summary Classification Of Held To Maturity Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	$ 15,640,264	$ 16,329,641
Business
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	5,803,760	6,546,087
Real estate - construction and land
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	1,103,661	1,021,595
Real estate - business
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	3,017,560	3,026,117
Real estate - personal
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	2,793,213	2,820,030
Consumer
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	2,049,166	1,950,502
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	283,568	307,083
Consumer credit card
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	586,358	655,078
Overdrafts
Loans And Allowance For Loan Losses [Line Items]
Held for Investment Loans	$ 2,978	$ 3,149

Loans And Allowance For Credi_5

Loans And Allowance For Credit Losses (Summary of Activity in the Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance	$ 200,527	$ 171,653	$ 220,834	$ 139,643
Provision for credit losses on loans	(27,433)	77,491	(37,788)	120,359
Loans charged off	8,868	11,245	21,809	25,637
Recoveries on Loans	8,169	2,845	11,158	6,379
Net loan charge-offs	699	8,400	10,651	19,258
Allowance for Credit Loss, Ending Balance	172,395	240,744	172,395	240,744
Liability for Unfunded Lending Commitments, Beginning Balance	42,430	32,250	38,307	17,165
Provision for credit losses on unfunded lending commitments	(18,222)	3,049	(14,099)	18,134
Liability for Unfunded Lending Commitments, Ending Balance	24,208	35,299	24,208	35,299
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS	196,603	276,043	196,603	276,043
Previously Reported [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		171,653		160,682
Liability for Unfunded Lending Commitments, Beginning Balance		32,250		1,075
Revision of Prior Period, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		0		(21,039)
Liability for Unfunded Lending Commitments, Beginning Balance		0		16,090
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance	119,623	83,551	121,549	62,049
Provision for credit losses on loans	(26,579)	50,245	(28,488)	71,353
Loans charged off	270	3,386	502	3,802
Recoveries on Loans	5,264	143	5,479	953
Net loan charge-offs	(4,994)	3,243	(4,977)	2,849
Allowance for Credit Loss, Ending Balance	98,038	130,553	98,038	130,553
Liability for Unfunded Lending Commitments, Beginning Balance	41,513	31,061	37,259	16,456
Provision for credit losses on unfunded lending commitments	(18,163)	2,991	(13,909)	17,596
Liability for Unfunded Lending Commitments, Ending Balance	23,350	34,052	23,350	34,052
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS	121,388	164,605	121,388	164,605
Commercial Portfolio Segment [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		83,551		91,760
Liability for Unfunded Lending Commitments, Beginning Balance		31,061		399
Commercial Portfolio Segment [Member] | Revision of Prior Period, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		0		(29,711)
Liability for Unfunded Lending Commitments, Beginning Balance		0		16,057
Personal Banking Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance	80,904	88,102	99,285	77,594
Provision for credit losses on loans	(854)	27,246	(9,300)	49,006
Loans charged off	8,598	7,859	21,307	21,835
Recoveries on Loans	2,905	2,702	5,679	5,426
Net loan charge-offs	5,693	5,157	15,628	16,409
Allowance for Credit Loss, Ending Balance	74,357	110,191	74,357	110,191
Liability for Unfunded Lending Commitments, Beginning Balance	917	1,189	1,048	709
Provision for credit losses on unfunded lending commitments	(59)	58	(190)	538
Liability for Unfunded Lending Commitments, Ending Balance	858	1,247	858	1,247
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS	$ 75,215	111,438	$ 75,215	111,438
Personal Banking Portfolio Segment [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		88,102		68,922
Liability for Unfunded Lending Commitments, Beginning Balance		1,189		676
Personal Banking Portfolio Segment [Member] | Revision of Prior Period, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		0		8,672
Liability for Unfunded Lending Commitments, Beginning Balance		$ 0		$ 33

Loans And Allowance For Credi_6

Loans And Allowance For Credit Losses (Aging Information On Past Due And Accruing Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	$ 15,564,795	$ 16,230,056
30 - 89 Days Past Due	51,965	50,855
90 Days Past Due and Still Accruing	12,338	22,190
Non-accrual loans	11,166	26,540
Total	15,640,264	16,329,641
Business
Loans And Allowance For Loan Losses [Line Items]
Total	5,803,760	6,546,087
Real estate - construction and land
Loans And Allowance For Loan Losses [Line Items]
Total	1,103,661	1,021,595
Real estate - business
Loans And Allowance For Loan Losses [Line Items]
Total	3,017,560	3,026,117
Real estate - personal
Loans And Allowance For Loan Losses [Line Items]
Total	2,793,213	2,820,030
Consumer
Loans And Allowance For Loan Losses [Line Items]
Total	2,049,166	1,950,502
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	283,568	307,083
Consumer credit card
Loans And Allowance For Loan Losses [Line Items]
Total	586,358	655,078
Overdrafts
Loans And Allowance For Loan Losses [Line Items]
Total	2,978	3,149
Commercial Portfolio Segment [Member] | Business
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	5,777,100	6,517,838
30 - 89 Days Past Due	17,547	2,252
90 Days Past Due and Still Accruing	274	3,473
Non-accrual loans	8,839	22,524
Commercial Portfolio Segment [Member] | Real estate - construction and land
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	1,101,716	1,021,592
30 - 89 Days Past Due	1,728	0
90 Days Past Due and Still Accruing	217	3
Non-accrual loans	0	0
Commercial Portfolio Segment [Member] | Real estate - business
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	3,012,063	3,016,215
30 - 89 Days Past Due	3,032	7,666
90 Days Past Due and Still Accruing	1,810	6
Non-accrual loans	655	2,230
Personal Banking Portfolio Segment [Member] | Real estate - personal
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	2,783,135	2,808,886
30 - 89 Days Past Due	5,683	6,521
90 Days Past Due and Still Accruing	2,723	2,837
Non-accrual loans	1,672	1,786
Personal Banking Portfolio Segment [Member] | Consumer
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	2,028,740	1,921,822
30 - 89 Days Past Due	18,690	25,417
90 Days Past Due and Still Accruing	1,736	3,263
Non-accrual loans	0	0
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	281,679	305,037
30 - 89 Days Past Due	1,115	1,656
90 Days Past Due and Still Accruing	774	390
Non-accrual loans	0	0
Personal Banking Portfolio Segment [Member] | Consumer credit card
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	577,576	635,770
30 - 89 Days Past Due	3,978	7,090
90 Days Past Due and Still Accruing	4,804	12,218
Non-accrual loans	0	0
Personal Banking Portfolio Segment [Member] | Overdrafts
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	2,786	2,896
30 - 89 Days Past Due	192	253
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	$ 0	$ 0

Loans And Allowance For Credi_7

Loans And Allowance For Credit Losses (Credit Quality Indicators Commercial Loan Portfolio) (Details) - Commercial Portfolio Segment [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Credit Quality Indicator [Line Items]
Current Fiscal Year	$ 1,567,616	$ 3,992,080
Fiscal Year before Current Fiscal Year	2,845,618	2,034,638
Two Years before Current Fiscal Year	1,678,885	927,791
Three Years before Current Fiscal Year	759,197	714,477
Four Years before Current Fiscal Year	544,984	545,687
Prior	813,520	547,950
Revolving Loans Amortized Cost Basis	1,715,161	1,831,176
Total	9,924,981	10,593,799
Business
Credit Quality Indicator [Line Items]
Current Fiscal Year	981,324	2,530,896
Fiscal Year before Current Fiscal Year	1,399,511	1,014,800
Two Years before Current Fiscal Year	844,385	463,062
Three Years before Current Fiscal Year	365,862	334,054
Four Years before Current Fiscal Year	218,646	172,528
Prior	367,444	300,317
Revolving Loans Amortized Cost Basis	1,626,588	1,730,430
Total	5,803,760	6,546,087
Real estate - construction and land
Credit Quality Indicator [Line Items]
Current Fiscal Year	247,729	514,148
Fiscal Year before Current Fiscal Year	518,810	330,480
Two Years before Current Fiscal Year	180,706	72,758
Three Years before Current Fiscal Year	70,578	50,735
Four Years before Current Fiscal Year	35,394	24,426
Prior	25,091	1,692
Revolving Loans Amortized Cost Basis	25,353	27,356
Total	1,103,661	1,021,595
Real estate - business
Credit Quality Indicator [Line Items]
Current Fiscal Year	338,563	947,036
Fiscal Year before Current Fiscal Year	927,297	689,358
Two Years before Current Fiscal Year	653,794	391,971
Three Years before Current Fiscal Year	322,757	329,688
Four Years before Current Fiscal Year	290,944	348,733
Prior	420,985	245,941
Revolving Loans Amortized Cost Basis	63,220	73,390
Total	3,017,560	3,026,117
Pass [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	1,528,346	3,846,461
Fiscal Year before Current Fiscal Year	2,700,010	1,962,947
Two Years before Current Fiscal Year	1,615,391	832,154
Three Years before Current Fiscal Year	665,848	573,884
Four Years before Current Fiscal Year	428,906	501,474
Prior	730,158	482,830
Revolving Loans Amortized Cost Basis	1,659,810	1,714,832
Total	9,328,469	9,914,582
Pass [Member] | Business
Credit Quality Indicator [Line Items]
Current Fiscal Year	977,576	2,472,419
Fiscal Year before Current Fiscal Year	1,388,657	966,068
Two Years before Current Fiscal Year	803,333	438,557
Three Years before Current Fiscal Year	345,101	329,207
Four Years before Current Fiscal Year	216,034	163,357
Prior	342,506	281,604
Revolving Loans Amortized Cost Basis	1,574,367	1,619,680
Total	5,647,574	6,270,892
Pass [Member] | Real estate - construction and land
Credit Quality Indicator [Line Items]
Current Fiscal Year	231,955	483,302
Fiscal Year before Current Fiscal Year	478,413	330,480
Two Years before Current Fiscal Year	180,706	56,747
Three Years before Current Fiscal Year	54,210	3,021
Four Years before Current Fiscal Year	2,723	24,426
Prior	25,091	1,692
Revolving Loans Amortized Cost Basis	25,353	27,356
Total	998,451	927,024
Pass [Member] | Real estate - business
Credit Quality Indicator [Line Items]
Current Fiscal Year	318,815	890,740
Fiscal Year before Current Fiscal Year	832,940	666,399
Two Years before Current Fiscal Year	631,352	336,850
Three Years before Current Fiscal Year	266,537	241,656
Four Years before Current Fiscal Year	210,149	313,691
Prior	362,561	199,534
Revolving Loans Amortized Cost Basis	60,090	67,796
Total	2,682,444	2,716,666
Special Mention [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	18,564	67,240
Fiscal Year before Current Fiscal Year	59,857	48,480
Two Years before Current Fiscal Year	34,531	64,704
Three Years before Current Fiscal Year	38,139	42,910
Four Years before Current Fiscal Year	23,497	22,595
Prior	10,284	2,973
Revolving Loans Amortized Cost Basis	16,889	44,751
Total	201,761	293,653
Special Mention [Member] | Business
Credit Quality Indicator [Line Items]
Current Fiscal Year	611	28,612
Fiscal Year before Current Fiscal Year	568	26,746
Two Years before Current Fiscal Year	24,203	14,102
Three Years before Current Fiscal Year	14,099	1,781
Four Years before Current Fiscal Year	669	5,091
Prior	6,029	1,664
Revolving Loans Amortized Cost Basis	16,815	41,749
Total	62,994	119,745
Special Mention [Member] | Real estate - construction and land
Credit Quality Indicator [Line Items]
Current Fiscal Year	15,469	29,692
Fiscal Year before Current Fiscal Year	28,020	0
Two Years before Current Fiscal Year	0	1,022
Three Years before Current Fiscal Year	1,004	34,532
Four Years before Current Fiscal Year	19,474	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	63,967	65,246
Special Mention [Member] | Real estate - business
Credit Quality Indicator [Line Items]
Current Fiscal Year	2,484	8,936
Fiscal Year before Current Fiscal Year	31,269	21,734
Two Years before Current Fiscal Year	10,328	49,580
Three Years before Current Fiscal Year	23,036	6,597
Four Years before Current Fiscal Year	3,354	17,504
Prior	4,255	1,309
Revolving Loans Amortized Cost Basis	74	3,002
Total	74,800	108,662
Substandard [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	19,976	65,282
Fiscal Year before Current Fiscal Year	85,686	23,022
Two Years before Current Fiscal Year	28,875	24,126
Three Years before Current Fiscal Year	52,602	97,292
Four Years before Current Fiscal Year	92,471	21,116
Prior	67,210	58,404
Revolving Loans Amortized Cost Basis	38,437	71,568
Total	385,257	360,810
Substandard [Member] | Business
Credit Quality Indicator [Line Items]
Current Fiscal Year	2,652	17,246
Fiscal Year before Current Fiscal Year	10,286	21,985
Two Years before Current Fiscal Year	16,848	5,076
Three Years before Current Fiscal Year	4,275	2,675
Four Years before Current Fiscal Year	1,833	3,578
Prior	13,078	13,390
Revolving Loans Amortized Cost Basis	35,381	68,976
Total	84,353	132,926
Substandard [Member] | Real estate - construction and land
Credit Quality Indicator [Line Items]
Current Fiscal Year	305	1,154
Fiscal Year before Current Fiscal Year	12,377	0
Two Years before Current Fiscal Year	0	14,989
Three Years before Current Fiscal Year	15,364	13,182
Four Years before Current Fiscal Year	13,197	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	41,243	29,325
Substandard [Member] | Real estate - business
Credit Quality Indicator [Line Items]
Current Fiscal Year	17,019	46,882
Fiscal Year before Current Fiscal Year	63,023	1,037
Two Years before Current Fiscal Year	12,027	4,061
Three Years before Current Fiscal Year	32,963	81,435
Four Years before Current Fiscal Year	77,441	17,538
Prior	54,132	45,014
Revolving Loans Amortized Cost Basis	3,056	2,592
Total	259,661	198,559
Non-Accrual [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	730	13,097
Fiscal Year before Current Fiscal Year	65	189
Two Years before Current Fiscal Year	88	6,807
Three Years before Current Fiscal Year	2,608	391
Four Years before Current Fiscal Year	110	502
Prior	5,868	3,743
Revolving Loans Amortized Cost Basis	25	25
Total	9,494	24,754
Non-Accrual [Member] | Business
Credit Quality Indicator [Line Items]
Current Fiscal Year	485	12,619
Fiscal Year before Current Fiscal Year	0	1
Two Years before Current Fiscal Year	1	5,327
Three Years before Current Fiscal Year	2,387	391
Four Years before Current Fiscal Year	110	502
Prior	5,831	3,659
Revolving Loans Amortized Cost Basis	25	25
Total	8,839	22,524
Non-Accrual [Member] | Real estate - business
Credit Quality Indicator [Line Items]
Current Fiscal Year	245	478
Fiscal Year before Current Fiscal Year	65	188
Two Years before Current Fiscal Year	87	1,480
Three Years before Current Fiscal Year	221	0
Four Years before Current Fiscal Year	0	0
Prior	37	84
Revolving Loans Amortized Cost Basis	0	0
Total	$ 655	$ 2,230

Loans And Allowance for Credi_8

Loans And Allowance for Credit Losses (Credit Quality Indicators Personal Banking Loan Portfolio) (Details) - Personal Banking Portfolio Segment [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Credit Quality Indicator [Line Items]
Current Fiscal Year	$ 681,634	$ 1,664,641
Fiscal Year before Current Fiscal Year	1,444,521	826,734
Two Years before Current Fiscal Year	665,700	380,452
Three Years before Current Fiscal Year	299,808	318,533
Four Years before Current Fiscal Year	246,608	303,661
Prior	762,353	633,424
Revolving Loans Amortized Cost Basis	1,614,659	1,608,397
Total	5,715,283	5,735,842
Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	366,723	1,124,481
Fiscal Year before Current Fiscal Year	1,003,692	488,945
Two Years before Current Fiscal Year	409,635	218,787
Three Years before Current Fiscal Year	184,106	202,427
Four Years before Current Fiscal Year	171,418	227,718
Prior	648,293	546,196
Revolving Loans Amortized Cost Basis	9,346	11,476
Total	2,793,213	2,820,030
Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	311,933	537,011
Fiscal Year before Current Fiscal Year	440,829	337,789
Two Years before Current Fiscal Year	256,065	161,665
Three Years before Current Fiscal Year	115,702	116,106
Four Years before Current Fiscal Year	75,190	75,943
Prior	114,060	87,228
Revolving Loans Amortized Cost Basis	735,387	634,760
Total	2,049,166	1,950,502
Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	283,568	307,083
Total	283,568	307,083
Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	586,358	655,078
Total	586,358	655,078
Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	2,978	3,149
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	2,978	3,149
Current to 90 Days Past Due
Credit Quality Indicator [Line Items]
Current Fiscal Year	681,610	1,663,866
Fiscal Year before Current Fiscal Year	1,443,626	825,810
Two Years before Current Fiscal Year	665,418	379,727
Three Years before Current Fiscal Year	299,318	317,857
Four Years before Current Fiscal Year	245,911	303,034
Prior	759,378	630,839
Revolving Loans Amortized Cost Basis	1,608,313	1,594,215
Total	5,703,574	5,715,348
Current to 90 Days Past Due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	366,723	1,123,918
Fiscal Year before Current Fiscal Year	1,002,972	488,379
Two Years before Current Fiscal Year	409,449	218,390
Three Years before Current Fiscal Year	183,822	201,971
Four Years before Current Fiscal Year	170,790	227,265
Prior	645,716	544,008
Revolving Loans Amortized Cost Basis	9,346	11,476
Total	2,788,818	2,815,407
Current to 90 Days Past Due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	311,909	536,799
Fiscal Year before Current Fiscal Year	440,654	337,431
Two Years before Current Fiscal Year	255,969	161,337
Three Years before Current Fiscal Year	115,496	115,886
Four Years before Current Fiscal Year	75,121	75,769
Prior	113,662	86,831
Revolving Loans Amortized Cost Basis	734,619	633,186
Total	2,047,430	1,947,239
Current to 90 Days Past Due | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	282,794	306,693
Total	282,794	306,693
Current to 90 Days Past Due | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	581,554	642,860
Total	581,554	642,860
Current to 90 Days Past Due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	2,978	3,149
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	2,978	3,149
Over 90 days past due
Credit Quality Indicator [Line Items]
Current Fiscal Year	24	746
Fiscal Year before Current Fiscal Year	876	733
Two Years before Current Fiscal Year	96	609
Three Years before Current Fiscal Year	377	631
Four Years before Current Fiscal Year	697	562
Prior	1,621	1,245
Revolving Loans Amortized Cost Basis	6,346	14,182
Total	10,037	18,708
Over 90 days past due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	534
Fiscal Year before Current Fiscal Year	701	375
Two Years before Current Fiscal Year	0	281
Three Years before Current Fiscal Year	171	411
Four Years before Current Fiscal Year	628	388
Prior	1,223	848
Revolving Loans Amortized Cost Basis	0	0
Total	2,723	2,837
Over 90 days past due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	24	212
Fiscal Year before Current Fiscal Year	175	358
Two Years before Current Fiscal Year	96	328
Three Years before Current Fiscal Year	206	220
Four Years before Current Fiscal Year	69	174
Prior	398	397
Revolving Loans Amortized Cost Basis	768	1,574
Total	1,736	3,263
Over 90 days past due | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	774	390
Total	774	390
Over 90 days past due | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	4,804	12,218
Total	4,804	12,218
Non-Accrual [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	29
Fiscal Year before Current Fiscal Year	19	191
Two Years before Current Fiscal Year	186	116
Three Years before Current Fiscal Year	113	45
Four Years before Current Fiscal Year	0	65
Prior	1,354	1,340
Revolving Loans Amortized Cost Basis	0	0
Total	1,672	1,786
Non-Accrual [Member] | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	29
Fiscal Year before Current Fiscal Year	19	191
Two Years before Current Fiscal Year	186	116
Three Years before Current Fiscal Year	113	45
Four Years before Current Fiscal Year	0	65
Prior	1,354	1,340
Revolving Loans Amortized Cost Basis	0	0
Total	$ 1,672	$ 1,786

Loans And Allowance for Credi_9

Loans And Allowance for Credit Losses (Collateral-Dependent Loans) (Details) - Commercial Portfolio Segment [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Credit Quality Indicator [Line Items]
Total	$ 2,578	$ 16,790
Business
Credit Quality Indicator [Line Items]
Business	2,578	15,804
Real estate - business
Credit Quality Indicator [Line Items]
Real estate - business	0	986
Business Assets
Credit Quality Indicator [Line Items]
Total	0	13,109
Business Assets | Business
Credit Quality Indicator [Line Items]
Business	0	13,109
Business Assets | Real estate - business
Credit Quality Indicator [Line Items]
Real estate - business	0	0
Future Revenue Streams
Credit Quality Indicator [Line Items]
Total	0	986
Future Revenue Streams | Business
Credit Quality Indicator [Line Items]
Business	0	0
Future Revenue Streams | Real estate - business
Credit Quality Indicator [Line Items]
Real estate - business	0	986
Oil & Gas Assets
Credit Quality Indicator [Line Items]
Total	2,578	2,695
Oil & Gas Assets | Business
Credit Quality Indicator [Line Items]
Business	2,578	2,695
Oil & Gas Assets | Real estate - business
Credit Quality Indicator [Line Items]
Real estate - business	$ 0	$ 0

Loans And Allowance For Cred_10

Loans And Allowance For Credit Losses (Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding ) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Loans And Allowance For Loan Losses [Line Items]
Credit Quality Personal Real Estate Loans Excluded	$ 187.4	$ 191.1
Consumer Healthcare Loans Excluded	$ 187.8	$ 188.1
Credit quality personal banking loan table percentage loans excluded	7.00%
Real estate - personal
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Real estate - personal | Under 600
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	0.80%	0.80%
Real estate - personal | 600 - 659
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	1.80%	1.90%
Real estate - personal | 660 - 719
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	7.70%	8.80%
Real estate - personal | 720 - 779
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	23.40%	24.50%
Real estate - personal | 780 and over
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	66.30%	64.00%
Consumer
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer | Under 600
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	1.70%	2.30%
Consumer | 600 - 659
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.60%	4.20%
Consumer | 660 - 719
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	13.50%	14.10%
Consumer | 720 - 779
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	23.90%	23.90%
Consumer | 780 and over
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	57.30%	55.50%
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Revolving Home Equity [Member] | Under 600
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	1.20%	1.30%
Revolving Home Equity [Member] | 600 - 659
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	1.80%	2.40%
Revolving Home Equity [Member] | 660 - 719
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	8.50%	8.60%
Revolving Home Equity [Member] | 720 - 779
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	22.90%	22.20%
Revolving Home Equity [Member] | 780 and over
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	65.60%	65.50%
Consumer credit card
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer credit card | Under 600
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.40%	5.00%
Consumer credit card | 600 - 659
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.10%	12.30%
Consumer credit card | 660 - 719
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	30.80%	31.20%
Consumer credit card | 720 - 779
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	28.50%	28.00%
Consumer credit card | 780 and over
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	26.20%	23.50%

Loans And Allowance For Cred_11

Loans And Allowance For Credit Losses (Troubled Debt Restructurings by Type of Modification) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	$ 118,419	$ 140,627
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	97,761	117,740
Assistance programs
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	7,301	7,804
Consumer bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	2,554	2,841
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	2,484	2,353
Non-accrual loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	$ 8,319	$ 9,889

Loans And Allowance For Cred_12

Loans And Allowance For Credit Losses (Outstanding Balance Of Loans Classified As Trouble Debt Restructurings) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	$ 118,419	$ 140,627
Balance 90 days past due at any time during previous 12 months	1,501
Commercial Portfolio Segment [Member] | Business
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	40,947
Balance 90 days past due at any time during previous 12 months	577
Commercial Portfolio Segment [Member] | Real estate - construction and land
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	10,105
Balance 90 days past due at any time during previous 12 months	0
Commercial Portfolio Segment [Member] | Real estate - business
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	53,734
Balance 90 days past due at any time during previous 12 months	0
Personal Banking Portfolio Segment [Member] | Real estate - personal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	3,258
Balance 90 days past due at any time during previous 12 months	316
Personal Banking Portfolio Segment [Member] | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	3,222
Balance 90 days past due at any time during previous 12 months	230
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	25
Balance 90 days past due at any time during previous 12 months	0
Personal Banking Portfolio Segment [Member] | Consumer credit card
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructurings	7,128
Balance 90 days past due at any time during previous 12 months	$ 378

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Debt Securities, Available-for-sale [Line Items]
Percentage decrease requiring a review for impairment	20.00%
Fair value of securities on impairment watch list	$ 14,000	$ 31,000
Total FV AFS Debt Securities	4,122,999	948,192
Unrealized Loss on AFS Debt Securities	40,785	6,358
AFS securities in loss position at period-end, change in unrealized loss	34,400
Securities pledged as collateral	5,600,000	$ 4,800,000
Securities pledged as collateral and may be sold or re-pledged	$ 215,300
Number of investments in a single issuer that exceed 10% of stockholder's equity	0
No investment in a single issuer exceeds this percentage of stockholder's equity	10.00%
U.S. government and federal agency obligations
Debt Securities, Available-for-sale [Line Items]
U.S. Treasury inflation-protected securities held, at fair value	$ 381,500
Private Equity Investments
Debt Securities, Available-for-sale [Line Items]
Other Securities, Gains realized on sales	1,600
Fair value adjustments, net	$ 25,000

Investment Securities (Investme

Investment Securities (Investment Securities, At Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investment Securities [Abstract]
Available for sale debt securities	$ 13,291,506	$ 12,449,264
Trading debt securities	29,002	35,321
Equity securities with a readily determinable fair value	6,981	2,966
Equtiy Securities without Readily Determinable Fair Values	1,697	1,397
Federal Reserve Bank Stock	34,222	34,070
Federal Home Loan Bank Stock	10,135	10,307
Equity Method Investments	15,836	18,000
Private equity investments	116,246	94,368
Total investment securities	13,505,625	12,645,693
Interest Receivable, Current	$ 39,700	$ 41,500

Investment Securities (Summary

Investment Securities (Summary Of Available For Sale Investment Securities By Maturity Groupings) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 13,077,042,000	$ 12,097,533,000
Fair Value	13,291,506,000	12,449,264,000
U.S. government and federal agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	724,567,000	775,592,000
Fair Value	780,152,000	838,059,000
U.S. government and federal agency obligations | Within 1 year
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,454,000
Fair Value	30,159,000
U.S. government and federal agency obligations | After 1 but within 5 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	500,689,000
Fair Value	529,808,000
U.S. government and federal agency obligations | After 5 but within 10 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	194,424,000
Fair Value	220,185,000
Government-sponsored enterprise obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,788,000	50,803,000
Fair Value	52,978,000	54,485,000
Government-sponsored enterprise obligations | After 10 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,788,000
Fair Value	52,978,000
State and Municipal Obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,000,831,000	1,968,006,000
Fair Value	2,052,030,000	2,045,099,000
State and Municipal Obligations | Within 1 year
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	140,856,000
Fair Value	141,924,000
State and Municipal Obligations | After 1 but within 5 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	808,293,000
Fair Value	840,159,000
State and Municipal Obligations | After 5 but within 10 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	655,198,000
Fair Value	674,067,000
State and Municipal Obligations | After 10 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	396,484,000
Fair Value	395,880,000
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,995,967,000	6,557,098,000
Fair Value	6,071,295,000	6,712,085,000
Non-Agency Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	825,175,000	358,074,000
Fair Value	825,608,000	361,074,000
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,870,004,000	1,853,791,000
Fair Value	2,891,799,000	1,882,243,000
Total Mortgage And Asset-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,691,146,000	8,768,963,000
Fair Value	9,788,702,000	8,955,402,000
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	609,710,000	534,169,000
Fair Value	617,644,000	$ 556,219,000
Other debt securities | Within 1 year
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	93,051,000
Fair Value	94,391,000
Other debt securities | After 1 but within 5 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	239,124,000
Fair Value	245,719,000
Other debt securities | After 5 but within 10 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	258,100,000
Fair Value	258,294,000
Other debt securities | After 10 years
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	19,435,000
Fair Value	$ 19,240,000

Investment Securities (Securiti

Investment Securities (Securities With Unrealized Losses And Length Of Impairment Period) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 3,974,375	$ 694,458
Unrealized Loss, Less than 12 months	39,716	3,741
Fair Value, Greater than 12 months	148,624	253,734
Unrealized Loss, Greater than 12 months	1,069	2,617
Total FV AFS Debt Securities	4,122,999	948,192
Unrealized Loss on AFS Debt Securities	40,785	6,358
Government-sponsored enterprise obligations
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	19,506	19,720
Unrealized Loss, Less than 12 months	312	98
Fair Value, Greater than 12 months	0	0
Unrealized Loss, Greater than 12 months	0	0
Total FV AFS Debt Securities	19,506	19,720
Unrealized Loss on AFS Debt Securities	312	98
State and Municipal Obligations
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	454,235	45,622
Unrealized Loss, Less than 12 months	5,130	230
Fair Value, Greater than 12 months	1,453	0
Unrealized Loss, Greater than 12 months	7	0
Total FV AFS Debt Securities	455,688	45,622
Unrealized Loss on AFS Debt Securities	5,137	230
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	2,326,148	470,373
Unrealized Loss, Less than 12 months	26,833	2,802
Fair Value, Greater than 12 months	17,535	0
Unrealized Loss, Greater than 12 months	180	0
Total FV AFS Debt Securities	2,343,683	470,373
Unrealized Loss on AFS Debt Securities	27,013	2,802
Non-Agency Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	364,857	112,861
Unrealized Loss, Less than 12 months	1,407	380
Fair Value, Greater than 12 months	0	0
Unrealized Loss, Greater than 12 months	0	0
Total FV AFS Debt Securities	364,857	112,861
Unrealized Loss on AFS Debt Securities	1,407	380
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	580,334	21,360
Unrealized Loss, Less than 12 months	1,714	56
Fair Value, Greater than 12 months	129,636	253,734
Unrealized Loss, Greater than 12 months	882	2,617
Total FV AFS Debt Securities	709,970	275,094
Unrealized Loss on AFS Debt Securities	2,596	2,673
Total Mortgage And Asset-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	3,271,339	604,594
Unrealized Loss, Less than 12 months	29,954	3,238
Fair Value, Greater than 12 months	147,171	253,734
Unrealized Loss, Greater than 12 months	1,062	2,617
Total FV AFS Debt Securities	3,418,510	858,328
Unrealized Loss on AFS Debt Securities	31,016	5,855
Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	229,295	24,522
Unrealized Loss, Less than 12 months	4,320	175
Fair Value, Greater than 12 months	0	0
Unrealized Loss, Greater than 12 months	0	0
Total FV AFS Debt Securities	229,295	24,522
Unrealized Loss on AFS Debt Securities	$ 4,320	$ 175

Investment Securities (Availabl

Investment Securities (Available For Sale Securities Unrealized Gains And Losses, By Security Type) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 13,077,042,000	$ 12,097,533,000
Gross Unrealized Gains	255,249,000	358,089,000
Gross Unrealized Losses	(40,785,000)	(6,358,000)
Allowance for Credit Losses	0	0
Fair Value	13,291,506,000	12,449,264,000
U.S. government and federal agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	724,567,000	775,592,000
Gross Unrealized Gains	55,585,000	62,467,000
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	780,152,000	838,059,000
Government-sponsored enterprise obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,788,000	50,803,000
Gross Unrealized Gains	2,502,000	3,780,000
Gross Unrealized Losses	(312,000)	(98,000)
Allowance for Credit Losses	0	0
Fair Value	52,978,000	54,485,000
State and Municipal Obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,000,831,000	1,968,006,000
Gross Unrealized Gains	56,336,000	77,323,000
Gross Unrealized Losses	(5,137,000)	(230,000)
Allowance for Credit Losses	0	0
Fair Value	2,052,030,000	2,045,099,000
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,995,967,000	6,557,098,000
Gross Unrealized Gains	102,341,000	157,789,000
Gross Unrealized Losses	(27,013,000)	(2,802,000)
Allowance for Credit Losses	0	0
Fair Value	6,071,295,000	6,712,085,000
Non-Agency Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	825,175,000	358,074,000
Gross Unrealized Gains	1,840,000	3,380,000
Gross Unrealized Losses	(1,407,000)	(380,000)
Allowance for Credit Losses	0	0
Fair Value	825,608,000	361,074,000
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,870,004,000	1,853,791,000
Gross Unrealized Gains	24,391,000	31,125,000
Gross Unrealized Losses	(2,596,000)	(2,673,000)
Allowance for Credit Losses	0	0
Fair Value	2,891,799,000	1,882,243,000
Total Mortgage And Asset-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,691,146,000	8,768,963,000
Gross Unrealized Gains	128,572,000	192,294,000
Gross Unrealized Losses	(31,016,000)	(5,855,000)
Allowance for Credit Losses	0	0
Fair Value	9,788,702,000	8,955,402,000
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	609,710,000	534,169,000
Gross Unrealized Gains	12,254,000	22,225,000
Gross Unrealized Losses	(4,320,000)	(175,000)
Allowance for Credit Losses	0	0
Fair Value	$ 617,644,000	$ 556,219,000

Investment Securities (Proceeds

Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Available-for-sale Securities				$ 0		$ 174,595
Proceeds from Sale of Equity Securities				0		2
Proceeds From Sale Of Other Securities				10,060		0
Total proceeds	[1]			10,060		174,597
Investment securities gains (losses), net		$ 16,804	$ (4,129)	26,657	[1]	(17,430)	[1]
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gains realized on sales				0		3,291
Equity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Equity Securities, Gains realized on sales				0		2
Fair value adjustments, net				15		(218)
Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Other Securities, Gains realized on sales				1,611		0
Fair value adjustments, net				$ 25,031		$ (20,505)
[1]	Available for sale debt securities, equity securities, and other securities.

Goodwill And Other Intangible_3

Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 745	$ 442	$ 1,700	$ 710

Goodwill And Other Intangible_4

Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Estimable Useful Lives) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 49,846	$ 46,508
Accumulated Amortization	(38,494)	(36,798)
Valuation Allowance	(804)	(2,103)
Net Amount	10,548	7,607
Core Deposit Premium
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,270	31,270
Accumulated Amortization	(30,098)	(29,912)
Valuation Allowance	0	0
Net Amount	1,172	1,358
Mortgage Servicing Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,576	15,238
Accumulated Amortization	(8,396)	(6,886)
Valuation Allowance	(804)	(2,103)
Net Amount	$ 9,376	$ 6,249

Goodwill And Other Intangible_5

Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) $ in Thousands	Jun. 30, 2021USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2021	$ 2,661
2022	1,646
2023	1,377
2024	1,149
2025	$ 952

Goodwill And Other Intangible_6

Goodwill And Other Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill And Net Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Goodwill and Intangible Assets [Roll Forward]
Amortization	$ 745	$ 442	$ 1,700	$ 710
Goodwill
Goodwill and Intangible Assets [Roll Forward]
Balance January 1			138,921
Originations			0
Amortization			0
Impairment reversal			0
Balance June 30, 2021	138,921		138,921
Easement
Goodwill and Intangible Assets [Roll Forward]
Balance January 1			3,600
Originations			0
Amortization			0
Impairment reversal			0
Balance June 30, 2021	3,600		3,600
Core Deposit Premium
Goodwill and Intangible Assets [Roll Forward]
Balance January 1			1,358
Originations			0
Amortization			(186)
Impairment reversal			0
Balance June 30, 2021	1,172		1,172
Mortgage Servicing Rights
Goodwill and Intangible Assets [Roll Forward]
Balance January 1			6,249
Originations			3,338
Amortization			(1,510)
Impairment reversal			1,299
Balance June 30, 2021	$ 9,376		$ 9,376

Goodwill And Other Intangible_7

Goodwill And Other Intangible Assets (Schedule Of Goodwill Allocated By Operating Segments) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 138,921	$ 138,921
Consumer segment
Goodwill [Line Items]
Goodwill	70,721	70,721
Commercial segment
Goodwill [Line Items]
Goodwill	67,454	67,454
Wealth segment
Goodwill [Line Items]
Goodwill	$ 746	$ 746

Guarantees (Details)

Guarantees (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2021	Dec. 31, 2020
Guarantor Obligations [Line Items]
Derivative Liabilities	[1]	$ 13,349	$ 18,675
Notional amount of underlying interest rate swaps associated with risk participation agreements		2,977,293	$ 3,015,189
Financial Standby Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Standby letters of credit, net liability		2,900
Contractual amount of letters of credit, guaranteed maximum potential future payments		412,700
Risk Participation Agreement [Member] | Indirect Guarantee Of Indebtedness [Member]
Guarantor Obligations [Line Items]
Derivative Liabilities		333
Notional amount of underlying interest rate swaps associated with risk participation agreements		$ 265,600
Minimum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years		2 years
Maximum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years		11 years
[1]	* The fair value of each class of derivative is shown in Note 11.

Leases (Narrative) (Details)

Leases (Narrative) (Details)	Jun. 30, 2021
Minimum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term	1 month
Maximum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term	6 years

Leases (Components of Lease Inc

Leases (Components of Lease Income) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Lease Income [Line Items]
Direct financing and sales-type leases		$ 5,795	$ 6,304	$ 11,916	$ 12,662
Operating leases(a)	[1]	1,930	2,160	4,004	4,221
Total lease income		7,725	$ 8,464	15,920	$ 16,883
Operating Lease Income from Related Party [Member]
Operating Lease Income [Line Items]
Operating leases(a)		$ 19		$ 38
[1]	(a) Includes rent from Tower Properties Company, a related party, of $19 thousand for the three month periods ended June 30, 2021 and 2020, and $38 thousand for the six months ended June 30, 2021 and 2020.

Pension Pension (Narrative) (De

Pension Pension (Narrative) (Details)	6 Months Ended
	Jun. 30, 2021USD ($)
Pension (Narrative) [Abstract]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0

Pension (Net Pension Cost) (Det

Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Pension [Abstract]
Service cost - benefits earned during the period	$ 94	$ 101	$ 189	$ 202
Interest cost on projected benefit obligation	556	823	1,112	1,645
Expected Return on Plan Assets	(1,124)	(1,297)	(2,248)	(2,594)
Amortization of Prior Service Cost	(68)	(68)	(136)	(136)
Defined Benefit Plan, Amortization of (Gain) Loss	651	542	1,302	1,084
Net periodic pension cost	$ 109	$ 101	$ 219	$ 201

Common Stock (Summary Of Compon

Common Stock (Summary Of Components Used To Calculate Basic And Diluted Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Commerce Bancshares, Inc.	$ 162,326	$ 39,863	$ 293,298	$ 91,720
Less Preferred Stock Dividends	0	2,250	0	4,500
Net income available to common shareholders	$ 162,326	$ 37,613	$ 293,298	$ 87,220
Basic income per common share	$ 1.38	$ 0.32	$ 2.50	$ 0.74
Diluted income per common share	$ 1.38	$ 0.32	$ 2.49	$ 0.74
Basic income per common share:
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Commerce Bancshares, Inc.	$ 162,326	$ 39,863	$ 293,298	$ 91,720
Less Preferred Stock Dividends	0	2,250	0	4,500
Net income available to common shareholders	162,326	37,613	293,298	87,220
Less income allocated to nonvested restricted stock	1,478	353	2,678	823
Net income allocated to common stock	$ 160,848	$ 37,260	$ 290,620	$ 86,397
Weighted average common shares outstanding	116,163	116,242	116,211	116,458
Basic income per common share	$ 1.38	$ 0.32	$ 2.50	$ 0.74
Diluted income per common share:
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less income allocated to nonvested restricted stock	$ 1,475	$ 354	$ 2,673	$ 823
Net income allocated to common stock	$ 160,851	$ 37,259	$ 290,625	$ 86,397
Weighted average common shares outstanding	116,163	116,242	116,211	116,458
Net income available to common shareholders	$ 162,326	$ 37,613	$ 293,298	$ 87,220
Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods	287	200	301	235
Weighted average diluted common shares outstanding	116,450	116,442	116,512	116,693
Diluted income per common share	$ 1.38	$ 0.32	$ 2.49	$ 0.74

Common Stock Common Stock (Anti

Common Stock Common Stock (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Common Stock nonprint [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	72	321	51	276

Common Stock (Preferred Stock R

Common Stock (Preferred Stock Redemption) (Details)	Sep. 01, 2020$ / shares
Earnings Per Share [Abstract]
Preferred Stock, Dividend Rate, Percentage	6.00%
Preferred stock, par value	$ 1

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance January 1				$ 331,377	$ 110,444
Other comprehensive loss before reclassifications to current earnings				(137,270)	322,653
Amounts reclassified to current earnings from accumulated other comprehensive income				(10,715)	(4,231)
Current period other comprehensive income (loss), before tax				(147,985)	318,422
Income tax (expense) benefit				36,998	(79,605)
Current period other comprehensive income (loss), net of tax		$ 51,638	$ 96,125	(110,987)	238,817
Balance June 30, 2021		220,390	349,261	220,390	349,261
Unrealized Gains (Losses) on Securities (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance January 1	[1]			263,801	102,073
Other comprehensive loss before reclassifications to current earnings	[1]			(137,270)	223,470
Amounts reclassified to current earnings from accumulated other comprehensive income	[1]			0	(3,292)
Current period other comprehensive income (loss), before tax	[1]			(137,270)	220,178
Income tax (expense) benefit	[1]			34,319	(55,044)
Current period other comprehensive income (loss), net of tax	[1]			(102,951)	165,134
Balance June 30, 2021	[1]	160,850	267,207	160,850	267,207
Pension Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance January 1				(25,118)	(21,940)
Other comprehensive loss before reclassifications to current earnings				0	0
Amounts reclassified to current earnings from accumulated other comprehensive income				1,166	948
Current period other comprehensive income (loss), before tax				1,166	948
Income tax (expense) benefit				(291)	(237)
Current period other comprehensive income (loss), net of tax				875	711
Balance June 30, 2021		(24,243)	(21,229)	(24,243)	(21,229)
Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance January 1	[2]			92,694	30,311
Other comprehensive loss before reclassifications to current earnings	[2]			0	99,183
Amounts reclassified to current earnings from accumulated other comprehensive income	[2]			(11,881)	(1,887)
Current period other comprehensive income (loss), before tax	[2]			(11,881)	97,296
Income tax (expense) benefit	[2]			2,970	(24,324)
Current period other comprehensive income (loss), net of tax	[2]			(8,911)	72,972
Balance June 30, 2021	[2]	$ 83,783	$ 103,283	$ 83,783	$ 103,283
[1]	The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains (losses), net" in the consolidated statements of income.
[2]	The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.

Segments Segments (Narrative) (

Segments Segments (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)Operating_SegmentsLocations	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)LocationsOperating_Segments	Jun. 30, 2020USD ($)
Segments [Abstract]
Number of Operating Segments | Operating_Segments	3		3
Number Of Locations | Locations	160		160
Segment Reporting Information, Intersegment Revenue | $	$ 0	$ 0	$ 0	$ 0

Segments (Schedule Of Financial

Segments (Schedule Of Financial Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Segment Reporting Information [Line Items]
Net interest income	$ 207,982	$ 203,057	$ 413,730		$ 404,122
Provision for credit losses	45,655	(80,539)	51,887		(138,492)
Non-interest income	139,143	117,515	275,188		241,178
INVESTMENT SECURITIES GAINS (LOSSES), NET	16,804	(4,129)	26,657	[1]	(17,430)	[1]
Non-interest expense	(198,126)	(187,512)	(390,699)		(381,210)
Income before income taxes	211,458	48,392	376,763		108,168
Consumer segment
Segment Reporting Information [Line Items]
Net interest income	80,809	81,270	158,748		160,251
Provision for credit losses	(5,664)	(5,025)	(15,565)		(16,231)
Non-interest income	36,905	36,293	75,153		70,374
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(73,949)	(75,304)	(144,453)		(152,716)
Income before income taxes	38,101	37,234	73,883		61,678
Commercial segment
Segment Reporting Information [Line Items]
Net interest income	114,640	102,878	224,809		188,774
Provision for credit losses	4,952	(3,278)	4,925		(2,922)
Non-interest income	52,259	45,939	102,987		95,826
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(82,617)	(78,230)	(161,898)		(159,050)
Income before income taxes	89,234	67,309	170,823		122,628
Wealth segment
Segment Reporting Information [Line Items]
Net interest income	17,654	13,424	35,111		26,383
Provision for credit losses	(4)	0	1		(3)
Non-interest income	52,505	44,590	103,490		91,999
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(34,048)	(30,213)	(67,091)		(61,982)
Income before income taxes	36,107	27,801	71,511		56,397
Segment Totals
Segment Reporting Information [Line Items]
Net interest income	213,103	197,572	418,668		375,408
Provision for credit losses	(716)	(8,303)	(10,639)		(19,156)
Non-interest income	141,669	126,822	281,630		258,199
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(190,614)	(183,747)	(373,442)		(373,748)
Income before income taxes	163,442	132,344	316,217		240,703
Other/Elimination
Segment Reporting Information [Line Items]
Net interest income	(5,121)	5,485	(4,938)		28,714
Provision for credit losses	46,371	(72,236)	62,526		(119,336)
Non-interest income	(2,526)	(9,307)	(6,442)		(17,021)
INVESTMENT SECURITIES GAINS (LOSSES), NET	16,804	(4,129)	26,657		(17,430)
Non-interest expense	(7,512)	(3,765)	(17,257)		(7,462)
Income before income taxes	$ 48,016	$ (83,952)	$ 60,546		$ (132,535)
[1]	Available for sale debt securities, equity securities, and other securities.

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, Notional Amount		$ 2,977,293	$ 3,015,189
Derivative Asset	[1]	61,358	89,889
Monetized Interest Rate Floor [Member]
Derivative [Line Items]
Derivative, Notional Amount		1,500,000
Derivative Asset		163,200
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred		$ 111,700
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer		5 years 6 months
Interest rate swaps
Derivative [Line Items]
Derivative, Notional Amount		$ 2,270,249	2,367,017
Derivative Asset		59,170	86,389
Variation Margin Impact to Positive Fair Values of Cleared Swaps		(207)	0
Variation Margin Impact to Negative Fair Values of Cleared Swaps		$ (46,600)	$ (69,200)
[1]	* The fair value of each class of derivative is shown in Note 11.

Derivative Instruments (Schedul

Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, Notional Amount	$ 2,977,293	$ 3,015,189
Interest rate swaps
Derivative [Line Items]
Derivative, Notional Amount	2,270,249	2,367,017
Interest rate caps
Derivative [Line Items]
Derivative, Notional Amount	185,643	103,028
Credit risk participation agreements
Derivative [Line Items]
Derivative, Notional Amount	386,484	381,170
Foreign exchange contracts
Derivative [Line Items]
Derivative, Notional Amount	4,662	7,431
Mortgage loan commitments
Derivative [Line Items]
Derivative, Notional Amount	59,054	67,543
Mortgage loan forward sale contracts
Derivative [Line Items]
Derivative, Notional Amount	8,701	0
Forward TBA contracts
Derivative [Line Items]
Derivative, Notional Amount	$ 62,500	$ 89,000

Derivative Instruments (Sched_2

Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative Asset	[1]	$ 61,358	$ 89,889
Derivative Liabilities	[1]	(13,349)	(18,675)
Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative Asset		59,170	86,389
Derivative Liabilities		(12,793)	(17,199)
Interest rate caps
Derivatives, Fair Value [Line Items]
Derivative Asset		94	1
Derivative Liabilities		(94)	(1)
Credit risk participation agreements
Derivatives, Fair Value [Line Items]
Derivative Asset		142	216
Derivative Liabilities		(333)	(701)
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative Asset		62	57
Derivative Liabilities		(43)	(103)
Mortgage loan commitments
Derivatives, Fair Value [Line Items]
Derivative Asset		1,820	3,226
Derivative Liabilities		0	0
Mortgage loan forward sale contracts
Derivatives, Fair Value [Line Items]
Derivative Asset		29	0
Derivative Liabilities		(1)	0
Forward TBA contracts
Derivatives, Fair Value [Line Items]
Derivative Asset		41	0
Derivative Liabilities		$ (85)	$ (671)
[1]	* The fair value of each class of derivative is shown in Note 11.

Derivative Instruments (Summary

Derivative Instruments (Summary of Cash Flow Hedge Activity) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Summary of Cash Flow Hedge Activity [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 14,566	$ 99,183
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	18,087	125,708
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax	(3,521)	(26,525)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	2,155	1,887
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	3,186	3,949
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(1,031)	(2,062)
Interest Rate Floor [Member]
Summary of Cash Flow Hedge Activity [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	14,566	99,183
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	18,087	125,708
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax	(3,521)	(26,525)
Interest and fees on loans | Interest Rate Floor [Member]
Summary of Cash Flow Hedge Activity [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	2,155	1,887
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	3,186	3,949
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (1,031)	$ (2,062)

Derivative Instruments (Summa_2

Derivative Instruments (Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	$ (614)	$ 2,643	$ 2,510	$ 2,780
Other non-interest income | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	875	22	1,950	288
Other non-interest income | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	0	0	15	19
Other non-interest income | Credit risk participation agreements
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	(385)	267	(20)	240
Other non-interest income | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	(12)	(44)	84	(82)
Loan fees and sales | Mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	(35)	2,548	(1,407)	2,089
Loan fees and sales | Mortgage loan forward sale contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	(11)	3	28	(1)
Loan fees and sales | Forward TBA contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	$ (1,046)	$ (153)	$ 1,860	$ 227

Derivative Instruments (Balance

Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		$ 61,358	$ 89,889
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Assets	[1]	61,358	89,889
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		13,349	18,675
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liabilities	[1]	13,349	18,675
Derivatives subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		59,371	86,497
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Net Amount Presented in the Balance Sheet		59,371	86,497
Derivative Asset, Not Offset, Policy Election Deduction		(187)	(108)
derivatve asset, fair value of collateral		0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral		59,184	86,389
Derivative Liability, Fair Value, Gross Liability		13,237	18,420
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Net Amount Presented in the Balance Sheet		13,237	18,420
Derivative Liability, Not Offset, Policy Election Deduction		(187)	(108)
Derivative Liability, Fair Value of Collateral		(11,896)	(16,738)
Derivative Liability, Fair Value, Amount Offset Against Collateral		1,154	1,574
Derivatives not subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		1,987	3,392
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Not Subject to Master Netting Arrangement		1,987	3,392
Derivative Liability, Fair Value, Gross Liability		112	255
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Not Subject to Master Netting Arrangement		$ 112	$ 255
[1]	* The fair value of each class of derivative is shown in Note 11.

Resale and Repurchase Agreeme_3

Resale and Repurchase Agreements (Narrative) (Details) - Collateral Swap [Member] - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Balance Sheet Offsetting [Line Items]
Collateral Swap Agreements	$ 200	$ 200
Collateral Already Posted, Aggregate Fair Value	203.5
Collateral Accepted, Aggregate Fair Value	$ 209.2

Resale and Repurchase Agreeme_4

Resale and Repurchase Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Total resale agreements, subject to master netting arrangements
Balance Sheet Offsetting [Line Items]
Securities Purchased under Agreements to Resell, Gross	$ 1,500,000	$ 1,050,000
Securities Purchased under Agreements to Resell, Liability	(200,000)	(200,000)
Securities purchased under agreements to resell	1,300,000	850,000
Securities Purchased under Agreements to Resell, Not Subject to Master Netting Arrangement	0	0
Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities	(1,300,000)	(850,000)
Securities Purchased under Agreements to Resell, Amount Offset Against Collateral	0	0
Total repurchase agreements, subject to master netting arrangements
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	2,505,893	2,256,113
Securities Sold under Agreements to Repurchase, Asset	(200,000)	(200,000)
Securities Sold under Agreements to Repurchase	2,305,893	2,056,113
Securities Sold under Agreements to Repurchase, Not Subject to Master Netting Arrangement	0	0
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(2,305,893)	(2,056,113)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	$ 0	$ 0

Resale and Repurchase Agreeme_5

Resale and Repurchase Agreements Remaining Contractual Maturities of Repurchase Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
U.S. government and federal agency obligations | Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 215,729	$ 150,305
U.S. government and federal agency obligations | Up to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	31,799	0
U.S. government and federal agency obligations | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	8,059	0
U.S. government and federal agency obligations | Total
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	255,587	150,305
Agency mortgage-backed securities | Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	1,712,923	1,598,614
Agency mortgage-backed securities | Up to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	54,972	34,018
Agency mortgage-backed securities | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	222,475	220,849
Agency mortgage-backed securities | Total
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	1,990,370	1,853,481
Non-agency mortgage-backed securities | Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	42,656	62,742
Non-agency mortgage-backed securities | Up to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Non-agency mortgage-backed securities | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Non-agency mortgage-backed securities | Total
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	42,656	62,742
Asset-backed securities | Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	183,979	155,917
Asset-backed securities | Up to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Asset-backed securities | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Asset-backed securities | Total
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	183,979	155,917
Other debt securities | Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	33,301	33,668
Other debt securities | Up to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Other debt securities | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Other debt securities | Total
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	33,301	33,668
Total repurchase agreements, gross amount recognized | Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	2,188,588	2,001,246
Total repurchase agreements, gross amount recognized | Up to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	86,771	34,018
Total repurchase agreements, gross amount recognized | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	230,534	220,849
Total repurchase agreements, gross amount recognized | Total
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 2,505,893	$ 2,256,113

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 3.8	$ 3.7	$ 7.7	$ 7.5
Nonvested Stock Award [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			4 years
Nonvested Stock Award [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			7 years
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			4 years
Contractual terms of stock options granted (in years)			10 years

Stock-Based Compensation (Summa

Stock-Based Compensation (Summary Of The Status Of Nonvested Share Awards) (Details)	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Nonvested Share Awards [Roll Forward]
Nonvested, Shares, Beginning Balance | shares	1,099,866
Granted, Shares | shares	202,202
Vested, Shares | shares	(227,590)
Forfeited, Shares | shares	(12,982)
Nonvested, Shares, Ending Balance | shares	1,061,496
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 52.11
Granted , Weighted Average Grant Date Fair Value | $ / shares	72.09
Vested , Weighted Average Grant Date Fair Value | $ / shares	43.30
Forfeited , Weighted Average Grant Date Fair Value | $ / shares	56.84
Nonvested , Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 57.74

Stock-Based Compensation Stock-

Stock-Based Compensation Stock-Based Compensation (Current Year Per Share Average Fair Value and Valuation Model Assumptions) (Details)	6 Months Ended
	Jun. 30, 2021$ / shares
Current Year Per Share Average Fair Value and Valuation Model Assumptions [Abstract]
Weighted per share average fair value at grant date	$ 16.78
Dividend yield	1.40%
Volatility	28.20%
Risk-free interest rate	0.70%
Expected term	5 years 8 months 12 days

Stock-Based Compensation (Sum_2

Stock-Based Compensation (Summary Of SAR Activity) (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)$ / sharesshares
Stock Appreciation Rights [Roll Forward]
Rights Outstanding, Beginning Balance | shares	1,005,896
Rights Granted | shares	72,416
Rights Forfeited | shares	(3,906)
Rights Expired | shares	(280)
Rights Exercised | shares	(214,271)
Rights Outstanding, Ending Balance | shares	859,855
Weighted Average Exercise Price Outstanding, Beginning Balance | $ / shares	$ 44.95
Weighted Average Exercise Price Granted | $ / shares	72.91
Weighted Average Exercise Price Forfeited | $ / shares	59.19
Weighted Average Exercise Price Expired | $ / shares	57.95
Weighted Average Exercise Price Exercised | $ / shares	39.59
Weighted Average Exercise Price Outstanding, Ending Balance | $ / shares	$ 48.57
Weighted Average Remaining Contractual Term	6 years 3 months 18 days
Aggregate Intrinsic Value | $	$ 22,356

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Narrative) (Details)	6 Months Ended
	Jun. 30, 2021Rate
Revenue from Contract with Customer [Abstract]
Percent of Revenue not in scope of ASC 606	60.00%

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Non-interest income		$ 139,143	$ 117,515	$ 275,188	$ 241,178
Total non-interest income from contracts with customers
Disaggregation of Revenue [Line Items]
Non-interest income		124,318	104,420	240,492	221,048
Total non-interest income from contracts with customers | Bank card transaction fees
Disaggregation of Revenue [Line Items]
Non-interest income		42,608	33,745	80,303	73,945
Total non-interest income from contracts with customers | Trust fees
Disaggregation of Revenue [Line Items]
Non-interest income		46,257	37,942	90,384	77,907
Total non-interest income from contracts with customers | Deposit account charges and other fees
Disaggregation of Revenue [Line Items]
Non-interest income		23,988	22,279	46,563	45,956
Total non-interest income from contracts with customers | Consumer brokerage services
Disaggregation of Revenue [Line Items]
Non-interest income		4,503	3,011	8,584	7,088
Total non-interest income from contracts with customers | Other non-interest income
Disaggregation of Revenue [Line Items]
Non-interest income		6,962	7,443	14,658	16,152
Other non-interest income
Disaggregation of Revenue [Line Items]
Non-interest income	[1]	$ 14,825	$ 13,095	$ 34,696	$ 20,130
[1]	This revenue is not within the scope of ASU 2014-09, and includes fees relating to capital market activities, loan fees and sales, derivative instruments, standby letters of credit and various other transactions.

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Schedule of Contract with Customer, Asset and Liability) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Bank card transaction fees
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	$ 13,248	$ 14,199	$ 10,655	$ 13,915
Trust fees
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	2,253	2,071	2,147	2,093
Deposit account charges and other fees
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	6,616	6,933	6,564	6,523
Consumer brokerage services
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	$ 355	$ 432	$ 476	$ 596

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value Measurements [Line Items]
Private equity investments	$ 116,246	$ 94,368
Level 3
Fair Value Measurements [Line Items]
Auction Rate Securities Available For Sale	8,000
Private equity investments	$ 116,246	$ 94,368

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)		Jun. 30, 2021	Dec. 31, 2020
Fair Value Measurements [Line Items]
Residential mortgage loans held for sale		$ 17,374,000	$ 39,396,000
U.S. government and federal agency obligations		780,152,000	838,059,000
Government-sponsored enterprise obligations		52,978,000	54,485,000
State and municipal obligations		2,052,030,000	2,045,099,000
Agency mortgage-backed securities		6,071,295,000	6,712,085,000
Non-agency mortgage-backed securities		825,608,000	361,074,000
Asset-backed securities		2,891,799,000	1,882,243,000
Other debt securities		617,644,000	556,219,000
Trading debt securities		29,002,000	35,321,000
Equity securities		6,981,000	2,966,000
Private equity investments		116,246,000	94,368,000
Derivative Asset	[1]	61,358,000	89,889,000
Assets held in trust for deferred compensation plan		20,969,000	19,278,000
Total assets		13,543,436,000	12,730,482,000
Derivative Liabilities	[1]	13,349,000	18,675,000
Liabilities held in trust for deferred compensation plan		20,969,000	19,278,000
Total Liabilities		34,318,000	37,953,000
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Measurements [Line Items]
Residential mortgage loans held for sale		0	0
U.S. government and federal agency obligations		780,152,000	838,059,000
Government-sponsored enterprise obligations		0	0
State and municipal obligations		0	0
Agency mortgage-backed securities		0	0
Non-agency mortgage-backed securities		0	0
Asset-backed securities		0	0
Other debt securities		0	0
Trading debt securities		0	0
Equity securities		6,981,000	2,966,000
Private equity investments		0	0
Derivative Asset	[1]	0	0
Assets held in trust for deferred compensation plan		20,969,000	19,278,000
Total assets		808,102,000	860,303,000
Derivative Liabilities	[1]	0	0
Liabilities held in trust for deferred compensation plan		20,969,000	19,278,000
Total Liabilities		20,969,000	19,278,000
Significant Other Observable Inputs (Level 2)
Fair Value Measurements [Line Items]
Residential mortgage loans held for sale		17,374,000	39,396,000
U.S. government and federal agency obligations		0	0
Government-sponsored enterprise obligations		52,978,000	54,485,000
State and municipal obligations		2,044,039,000	2,037,131,000
Agency mortgage-backed securities		6,071,295,000	6,712,085,000
Non-agency mortgage-backed securities		825,608,000	361,074,000
Asset-backed securities		2,891,799,000	1,882,243,000
Other debt securities		617,644,000	556,219,000
Trading debt securities		29,002,000	35,321,000
Equity securities		0	0
Private equity investments		0	0
Derivative Asset	[1]	59,396,000	86,447,000
Assets held in trust for deferred compensation plan		0	0
Total assets		12,609,135,000	11,764,401,000
Derivative Liabilities	[1]	13,016,000	17,974,000
Liabilities held in trust for deferred compensation plan		0	0
Total Liabilities		13,016,000	17,974,000
Significant Unobservable Inputs (Level 3)
Fair Value Measurements [Line Items]
Residential mortgage loans held for sale		0	0
U.S. government and federal agency obligations		0	0
Government-sponsored enterprise obligations		0	0
State and municipal obligations		7,991,000	7,968,000
Agency mortgage-backed securities		0	0
Non-agency mortgage-backed securities		0	0
Asset-backed securities		0	0
Other debt securities		0	0
Trading debt securities		0	0
Equity securities		0	0
Private equity investments		116,246,000	94,368,000
Derivative Asset	[1]	1,962,000	3,442,000
Assets held in trust for deferred compensation plan		0	0
Total assets		126,199,000	105,778,000
Derivative Liabilities	[1]	333,000	701,000
Liabilities held in trust for deferred compensation plan		0	0
Total Liabilities		$ 333,000	$ 701,000
[1]	* The fair value of each class of derivative is shown in Note 11.

Fair Value Measurements (Summ_2

Fair Value Measurements (Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair Value Assets Measured on Recurring Basis [Roll Forward]
Beginning balance		$ 103,863	$ 88,964	$ 105,077	$ 104,344
Total gains or losses (realized /unrealized), included in earnings		16,246	(4,683)	23,604	(18,177)
Total gains or losses (realized/unrealized), included in other comprehensive income	[1]	18	1,123	17	(372)
Discount accretion		3	5	6	9
Purchase of private equity securities		5,656	155	5,656	269
Sale/pay down of private equity investments		(356)	0	(8,832)	(69)
Capitalized interest/dividends		23	29	23	29
Purchase Of Risk Participation Agreement		445	0	445	0
Sale Of Risk Participation Agreement		(32)	(369)	(130)	(809)
Ending balance		125,866	85,224	125,866	85,224
Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		18,100	(4,682)	26,660	(17,746)
Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		18	1,123	17	(372)
State and Municipal Obligations
Fair Value Assets Measured on Recurring Basis [Roll Forward]
Beginning balance		7,970	8,362	7,968	9,853
Total gains or losses (realized /unrealized), included in earnings		0	0	0	0
Total gains or losses (realized/unrealized), included in other comprehensive income	[1]	18	1,123	17	(372)
Discount accretion		3	5	6	9
Purchase of private equity securities		0	0	0	0
Sale/pay down of private equity investments		0	0	0	0
Capitalized interest/dividends		0	0	0	0
Purchase Of Risk Participation Agreement		0	0	0	0
Sale Of Risk Participation Agreement		0	0	0	0
Ending balance		7,991	9,490	7,991	9,490
Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		0	0	0	0
Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		18	1,123	17	(372)
Private Equity Investments
Fair Value Assets Measured on Recurring Basis [Roll Forward]
Beginning balance		94,257	81,159	94,368	94,122
Total gains or losses (realized /unrealized), included in earnings		16,666	(7,497)	25,031	(20,505)
Total gains or losses (realized/unrealized), included in other comprehensive income	[1]	0	0	0	0
Discount accretion		0	0	0	0
Purchase of private equity securities		5,656	155	5,656	269
Sale/pay down of private equity investments		(356)	0	(8,832)	(69)
Capitalized interest/dividends		23	29	23	29
Purchase Of Risk Participation Agreement		0	0	0	0
Sale Of Risk Participation Agreement		0	0	0	0
Ending balance		116,246	73,846	116,246	73,846
Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		16,666	(7,497)	25,031	(20,505)
Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		0	0	0	0
Derivatives
Fair Value Assets Measured on Recurring Basis [Roll Forward]
Beginning balance		1,636	(557)	2,741	369
Total gains or losses (realized /unrealized), included in earnings		(420)	2,814	(1,427)	2,328
Total gains or losses (realized/unrealized), included in other comprehensive income	[1]	0	0	0	0
Discount accretion		0	0	0	0
Purchase of private equity securities		0	0	0	0
Sale/pay down of private equity investments		0	0	0	0
Capitalized interest/dividends		0	0	0	0
Purchase Of Risk Participation Agreement		445	0	445	0
Sale Of Risk Participation Agreement		(32)	(369)	(130)	(809)
Ending balance		1,629	1,888	1,629	1,888
Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		1,434	2,815	1,629	2,759
Total gains or losses for the six months included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2021		$ 0	$ 0	$ 0	$ 0
[1]	* Included in "net unrealized gains (losses) on other securities" in the consolidated statements of comprehensive income.

Fair Value Measurements (Summ_3

Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ 16,246	$ (4,683)	$ 23,604	$ (18,177)
Change in unrealized gains or losses relating to assets still held	18,100	(4,682)	26,660	(17,746)
Loan fees and sales
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	(35)	2,547	(1,407)	2,088
Change in unrealized gains or losses relating to assets still held	1,820	2,547	1,820	2,547
Other non-interest income
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	(385)	267	(20)	240
Change in unrealized gains or losses relating to assets still held	(386)	268	(191)	212
Investment Securities Gains (Losses), Net
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	16,666	(7,497)	25,031	(20,505)
Change in unrealized gains or losses relating to assets still held	$ 16,666	$ (7,497)	$ 25,031	$ (20,505)

Fair Value Measurements (Summ_4

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details)	6 Months Ended
	Jun. 30, 2021Rate
Fair Value Assets Measured on Recurring Basis [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Auction rate securities
Fair Value Assets Measured on Recurring Basis [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Estimated market recovery period	5 years
Auction rate securities | Minimum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
Estimated market rate	1.10%
Auction rate securities | Maximum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
Estimated market rate	1.40%
Auction rate securities | Weighted Average [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
Estimated market recovery period	5 years	[1]
Estimated market rate	1.20%	[1]
Private Equity Investments
Fair Value Assets Measured on Recurring Basis [Line Items]
Valuation Technique, Market comparable companies	Market comparable companies
Private Equity Investments | Minimum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
EBITDA multiple	4
Private Equity Investments | Maximum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
EBITDA multiple	6
Private Equity Investments | Weighted Average [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
EBITDA multiple	5.3	[1]
Mortgage loan commitments
Fair Value Assets Measured on Recurring Basis [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Mortgage loan commitments | Minimum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
Probability of funding	68.30%
Embedded servicing value	0.70%
Mortgage loan commitments | Maximum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
Probability of funding	100.00%
Embedded servicing value	1.10%
Mortgage loan commitments | Weighted Average [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
Probability of funding	86.70%	[1]
Embedded servicing value	1.00%	[1]
[1]	* Unobservable inputs were weighted by the relative fair value of the instruments.

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Loans	$ 0	$ 12,066
Loans Nonrecurring Basis Gains (Losses)	0	(3,079)
Mortgage servicing rights	9,376	5,625
Mortgage Servicing Rights Nonrecurring Basis Gains (Losses)	1,299	(1,851)
Long-lived assets	984	348
Long Lived Assets Nonrecurring Basis Gains Losses	(276)	(5)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Loans	0	0
Mortgage servicing rights	0	0
Long-lived assets	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Loans	0	0
Mortgage servicing rights	0	0
Long-lived assets	0	0
Level 3
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Loans	0	12,066
Mortgage servicing rights	9,376	5,625
Long-lived assets	$ 984	$ 348

Fair Value Measurements and Dis

Fair Value Measurements and Disclosures (Schedule of Quantitative Information about Level Three Fair Value Measurements - Nonrecurring Basis) (Details)	6 Months Ended
	Jun. 30, 2021USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans in foreclosure	$ 1,000
Mortgage Servicing Rights | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	9.02%
Prepayment speeds (CPR)*	10.46%
Performing loans	$ 70
Delinquent loans	$ 200
Mortgage Servicing Rights | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	9.34%
Prepayment speeds (CPR)*	13.21%
Performing loans	$ 72
Delinquent loans	$ 750
Mortgage Servicing Rights | Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	9.17%	[1]
Prepayment speeds (CPR)*	12.11%	[1]
Performing loans	$ 71	[1]
[1]	*Ranges and weighted averages based on interest rate tranches

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Schedule Of Estimated Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Carrying Amount
Fair Value, Balance Sheet Grouping [Line Items]
Loans		$ 15,640,264	$ 16,329,641
Loans held for sale		23,697	45,089
Investment securities		13,488,092	12,626,296
Federal Funds Sold		5,945	0
Securities purchased under agreements to resell		1,300,000	850,000
Interest earning deposits with banks		2,161,644	1,747,363
Cash and due from banks		358,122	437,563
Derivative Asset		61,358	89,889
Assets held in trust for deferred compensation plan		20,969	19,278
Assets, Fair Value Financial Instruments		33,060,091	32,145,119
Non-interest bearing deposits		11,085,286	10,497,598
Savings, interest checking and money market deposits		14,654,696	14,604,456
Certificates of deposits		1,746,255	1,844,691
Federal funds purchased		12,335	42,270
Securities sold under agreements to repurchase		2,305,893	2,056,113
Other borrowings		1,411	0
Derivative Liabilities		13,349	18,675
Liabilities held in trust for deferred compensation plan		20,969	19,278
Financial Liabilities Fair Value Disclosure		29,840,194	29,083,081
Carrying Amount | Business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		5,803,760	6,546,087
Carrying Amount | Real estate - construction and land
Fair Value, Balance Sheet Grouping [Line Items]
Loans		1,103,661	1,021,595
Carrying Amount | Real estate - business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		3,017,560	3,026,117
Carrying Amount | Real estate - personal
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,793,213	2,820,030
Carrying Amount | Consumer
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,049,166	1,950,502
Carrying Amount | Revolving home equity
Fair Value, Balance Sheet Grouping [Line Items]
Loans		283,568	307,083
Carrying Amount | Consumer credit card
Fair Value, Balance Sheet Grouping [Line Items]
Loans		586,358	655,078
Carrying Amount | Overdrafts
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,978	3,149
Estimated Fair Value at June 30, 2021
Fair Value, Balance Sheet Grouping [Line Items]
Loans		15,516,265	16,147,581
Loans held for sale		23,697	45,089
Investment securities		13,488,092	12,626,296
Federal Funds Sold		5,945	0
Securities purchased under agreements to resell		1,320,677	894,338
Interest earning deposits with banks		2,161,644	1,747,363
Cash and due from banks		358,122	437,563
Derivative Asset		61,358	89,889
Assets held in trust for deferred compensation plan		20,969	19,278
Assets, Fair Value Financial Instruments		32,956,769	32,007,397
Non-interest bearing deposits		11,085,286	10,497,598
Savings, interest checking and money market deposits		14,654,696	14,604,456
Certificates of deposits		1,748,788	1,847,277
Federal funds purchased		12,335	42,270
Securities sold under agreements to repurchase		2,305,957	2,056,173
Other borrowings		1,411	0
Derivative Liabilities		13,349	18,675
Liabilities held in trust for deferred compensation plan		20,969	19,278
Financial Liabilities Fair Value Disclosure		29,842,791	29,085,727
Estimated Fair Value at June 30, 2021 | Business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		5,750,743	6,467,572
Estimated Fair Value at June 30, 2021 | Real estate - construction and land
Fair Value, Balance Sheet Grouping [Line Items]
Loans		1,080,298	995,873
Estimated Fair Value at June 30, 2021 | Real estate - business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		3,014,609	3,016,576
Estimated Fair Value at June 30, 2021 | Real estate - personal
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,796,020	2,830,521
Estimated Fair Value at June 30, 2021 | Consumer
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,048,176	1,953,217
Estimated Fair Value at June 30, 2021 | Revolving home equity
Fair Value, Balance Sheet Grouping [Line Items]
Loans		281,395	304,434
Estimated Fair Value at June 30, 2021 | Consumer credit card
Fair Value, Balance Sheet Grouping [Line Items]
Loans		542,235	576,320
Estimated Fair Value at June 30, 2021 | Overdrafts
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,789	3,068
Estimated Fair Value at June 30, 2021 | Level 1
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Loans held for sale		0	0
Investment securities		787,133	841,025
Federal Funds Sold		5,945	0
Securities purchased under agreements to resell		0	0
Interest earning deposits with banks		2,161,644	1,747,363
Cash and due from banks		358,122	437,563
Derivative Asset		0	0
Assets held in trust for deferred compensation plan		20,969	19,278
Assets, Fair Value Financial Instruments		3,333,813	3,045,229
Non-interest bearing deposits		11,085,286	10,497,598
Savings, interest checking and money market deposits		14,654,696	14,604,456
Certificates of deposits		0	0
Federal funds purchased		12,335	42,270
Securities sold under agreements to repurchase		0	0
Other borrowings		0	0
Derivative Liabilities		0	0
Liabilities held in trust for deferred compensation plan		20,969	19,278
Financial Liabilities Fair Value Disclosure		25,773,286	25,163,602
Estimated Fair Value at June 30, 2021 | Level 1 | Business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Real estate - construction and land
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Real estate - business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Real estate - personal
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Consumer
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Revolving home equity
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Consumer credit card
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 1 | Overdrafts
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Loans held for sale		23,697	45,089
Investment securities		12,532,365	11,638,558
Federal Funds Sold		0	0
Securities purchased under agreements to resell		0	0
Interest earning deposits with banks		0	0
Cash and due from banks		0	0
Derivative Asset		59,396	86,447
Assets held in trust for deferred compensation plan		0	0
Assets, Fair Value Financial Instruments		12,615,458	11,770,094
Non-interest bearing deposits		0	0
Savings, interest checking and money market deposits		0	0
Certificates of deposits		0	0
Federal funds purchased		0	0
Securities sold under agreements to repurchase		0	0
Other borrowings		1,411	0
Derivative Liabilities		13,016	17,974
Liabilities held in trust for deferred compensation plan		0	0
Financial Liabilities Fair Value Disclosure		14,427	17,974
Estimated Fair Value at June 30, 2021 | Level 2 | Business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Real estate - construction and land
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Real estate - business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Real estate - personal
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Consumer
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Revolving home equity
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Consumer credit card
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 2 | Overdrafts
Fair Value, Balance Sheet Grouping [Line Items]
Loans		0	0
Estimated Fair Value at June 30, 2021 | Level 3
Fair Value, Balance Sheet Grouping [Line Items]
Loans		15,516,265	16,147,581
Loans held for sale		0	0
Investment securities		168,594	146,713
Federal Funds Sold		0	0
Securities purchased under agreements to resell		1,320,677	894,338
Interest earning deposits with banks		0	0
Cash and due from banks		0	0
Derivative Asset		1,962	3,442
Assets held in trust for deferred compensation plan		0	0
Assets, Fair Value Financial Instruments		17,007,498	17,192,074
Non-interest bearing deposits		0	0
Savings, interest checking and money market deposits		0	0
Certificates of deposits		1,748,788	1,847,277
Federal funds purchased		0	0
Securities sold under agreements to repurchase		2,305,957	2,056,173
Other borrowings		0	0
Derivative Liabilities		333	701
Liabilities held in trust for deferred compensation plan		0	0
Financial Liabilities Fair Value Disclosure		4,055,078	3,904,151
Estimated Fair Value at June 30, 2021 | Level 3 | Business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		5,750,743	6,467,572
Estimated Fair Value at June 30, 2021 | Level 3 | Real estate - construction and land
Fair Value, Balance Sheet Grouping [Line Items]
Loans		1,080,298	995,873
Estimated Fair Value at June 30, 2021 | Level 3 | Real estate - business
Fair Value, Balance Sheet Grouping [Line Items]
Loans		3,014,609	3,016,576
Estimated Fair Value at June 30, 2021 | Level 3 | Real estate - personal
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,796,020	2,830,521
Estimated Fair Value at June 30, 2021 | Level 3 | Consumer
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,048,176	1,953,217
Estimated Fair Value at June 30, 2021 | Level 3 | Revolving home equity
Fair Value, Balance Sheet Grouping [Line Items]
Loans		281,395	304,434
Estimated Fair Value at June 30, 2021 | Level 3 | Consumer credit card
Fair Value, Balance Sheet Grouping [Line Items]
Loans		542,235	576,320
Estimated Fair Value at June 30, 2021 | Level 3 | Overdrafts
Fair Value, Balance Sheet Grouping [Line Items]
Loans		2,789	3,068
Interest earning deposits with banks		2,161,644	1,747,363
Cash and due from banks		358,122	437,563
Derivative Asset	[1]	61,358	89,889
Assets held in trust for deferred compensation plan		20,969	19,278
Non-interest bearing deposits		11,085,286	10,497,598
Savings, interest checking and money market deposits		14,654,696	14,604,456
Other borrowings		2,194	802
Derivative Liabilities	[1]	13,349	18,675
Liabilities held in trust for deferred compensation plan		20,969	19,278
Level 1
Fair Value, Balance Sheet Grouping [Line Items]
Derivative Asset	[1]	0	0
Assets held in trust for deferred compensation plan		20,969	19,278
Derivative Liabilities	[1]	0	0
Liabilities held in trust for deferred compensation plan		20,969	19,278
Level 2
Fair Value, Balance Sheet Grouping [Line Items]
Derivative Asset	[1]	59,396	86,447
Assets held in trust for deferred compensation plan		0	0
Derivative Liabilities	[1]	13,016	17,974
Liabilities held in trust for deferred compensation plan		0	0
Level 3
Fair Value, Balance Sheet Grouping [Line Items]
Derivative Asset	[1]	1,962	3,442
Assets held in trust for deferred compensation plan		0	0
Derivative Liabilities	[1]	333	701
Liabilities held in trust for deferred compensation plan		$ 0	$ 0
[1]	* The fair value of each class of derivative is shown in Note 11.