UMB Financial (UMBF) 10-Q 29 Apr 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	Apr. 23, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Trading Symbol	UMBF
Entity Registrant Name	UMB FINANCIAL CORP
Entity Central Index Key	0000101382
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		48,307,790
Entity Shell Company	false
Entity File Number	001-38481
Entity Tax Identification Number	43-0903811
Entity Address, Address Line One	1010 Grand Boulevard
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	860-7000
Title of 12(b) Security	Common Stock, $1.00 Par Value
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	MO

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Loans	$ 16,497,385	$ 16,103,651
Allowance for credit losses on loans	(202,814)	(215,973)
Net loans	16,294,571	15,887,678
Loans held for sale	10,275	6,708
Securities:
Available for sale (amortized cost of $9,552,397 and $8,887,734, respectively)	9,753,392	9,299,688
Held to maturity, net of allowance for credit losses of $2,959 and $2,610, respectively (fair value of $1,012,129 and $1,029,444, respectively)	1,039,711	1,012,004
Trading securities	29,099	35,020
Other securities	298,209	296,053
Total securities	11,120,411	10,642,765
Federal funds sold and securities purchased under agreements to resell	1,629,813	1,650,335
Interest-bearing due from banks	3,860,763	3,110,042
Cash and due from banks	387,230	430,638
Premises and equipment, net	286,068	293,095
Accrued income	131,533	139,892
Goodwill	174,518	180,867
Other intangibles, net	17,793	21,056
Other assets	756,414	764,428
Total assets	34,669,389	33,127,504
Deposits:
Noninterest-bearing demand	11,604,415	9,879,970
Interest-bearing demand and savings	16,011,812	16,295,186
Time deposits under $250,000	457,290	477,748
Time deposits of $250,000 or more	207,275	398,347
Total deposits	28,280,792	27,051,251
Federal funds purchased and repurchase agreements	2,759,818	2,315,497
Long-term debt	270,074	269,595
Accrued expenses and taxes	239,001	319,676
Other liabilities	161,465	154,537
Total liabilities	31,711,150	30,110,556
SHAREHOLDERS' EQUITY
Common stock, $1.00 par value; 80,000,000 shares authorized; 55,056,730 shares issued, 48,302,634 and 48,006,386 shares outstanding, respectively	55,057	55,057
Capital surplus	1,093,667	1,090,450
Retained earnings	1,968,318	1,891,246
Accumulated other comprehensive income, net	169,197	318,340
Treasury stock, 6,754,096 and 7,050,344 shares, at cost, respectively	(328,000)	(338,145)
Total shareholders' equity	2,958,239	3,016,948
Total liabilities and shareholders' equity	$ 34,669,389	$ 33,127,504

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Available for sale securities, amortized cost	$ 9,552,397	$ 8,887,734
Held to maturity securities, allowance for credit losses	2,959	2,610
Held to Maturity, Fair value	$ 1,012,129	$ 1,029,444
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	55,056,730	55,056,730
Common stock, shares outstanding	48,302,634	48,006,386
Treasury stock, shares	6,754,096	7,050,344

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
INTEREST INCOME
Loans	$ 150,170	$ 151,026
Securities:
Taxable interest	27,162	27,212
Tax-exempt interest	24,964	24,404
Total securities income	52,126	51,616
Federal funds and resell agreements	2,821	5,452
Interest-bearing due from banks	703	2,663
Trading securities	159	654
Total interest income	205,979	211,411
INTEREST EXPENSE
Deposits	6,798	29,732
Federal funds and repurchase agreements	1,886	6,381
Other	3,180	1,357
Total interest expense	11,864	37,470
Net interest income	194,115	173,941
Provision for credit losses	(7,500)	88,000
Net interest income after provision for credit losses	201,615	85,941
NONINTEREST INCOME
Trust and securities processing	54,834	47,000
Trading and investment banking	9,356	1,723
Service charges on deposit accounts	21,976	25,081
Insurance fees and commissions	420	259
Brokerage fees	3,334	9,860
Bankcard fees	14,673	16,545
Investment securities (losses) gains, net	(8,336)	3,520
Other	12,640	(5,564)
Total noninterest income	108,897	98,424
NONINTEREST EXPENSE
Salaries and employee benefits	127,681	111,060
Occupancy, net	11,935	12,180
Equipment	19,615	21,241
Supplies and services	3,492	4,185
Marketing and business development	2,345	4,640
Processing fees	15,417	13,390
Legal and consulting	5,755	6,110
Bankcard	4,956	4,860
Amortization of other intangible assets	1,380	1,734
Regulatory fees	2,546	2,366
Other	5,824	6,853
Total noninterest expense	200,946	188,619
Income (loss) before income taxes	109,566	(4,254)
Income tax expense (benefit)	16,923	(815)
NET INCOME (LOSS)	$ 92,643	$ (3,439)
PER SHARE DATA
Net income (loss) – basic	$ 1.93	$ (0.07)
Net income (loss) – diluted	1.91	(0.07)
Dividends	$ 0.32	$ 0.31
Weighted average shares outstanding – basic	48,096,643	48,689,876
Weighted average shares outstanding – diluted	48,520,752	48,689,876

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 92,643	$ (3,439)
Unrealized gains and losses on debt securities:
Change in unrealized holding gains and losses, net	(199,038)	164,116
Less: Reclassification adjustment for gains included in net income	(2,720)	(1,227)
Change in unrealized gains and losses on debt securities during the period	(201,758)	162,889
Unrealized gains and losses on derivative hedges:
Change in unrealized gains and losses on derivative hedges	6,503	14,525
Less: Reclassification adjustment for (gains) losses included in net income	(842)	768
Change in unrealized gains and losses on derivative hedges	5,661	15,293
Other comprehensive (loss) income, before tax	(196,097)	178,182
Income tax benefit (expense)	46,954	(41,972)
Other comprehensive (loss) income	(149,143)	136,210
Comprehensive (loss) income	$ (56,500)	$ 132,771

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect Adjustments [Member]	Adjusted Balance [Member]	Common Stock	Common StockAdjusted Balance [Member]	Capital Surplus	Capital SurplusAdjusted Balance [Member]	Retained Earnings	Retained EarningsCumulative Effect Adjustments [Member]	Retained EarningsAdjusted Balance [Member]	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Adjusted Balance [Member]	Treasury Stock	Treasury StockAdjusted Balance [Member]
Beginning Balance at Dec. 31, 2019	$ 2,606,440	$ (7,039)	$ 2,599,401	$ 55,057	$ 55,057	$ 1,073,764	$ 1,073,764	$ 1,672,438	$ (7,039)	$ 1,665,399	$ 83,180	$ 83,180	$ (277,999)	$ (277,999)
Total comprehensive income (loss)	132,771							(3,439)			136,210
Dividends	(15,209)							(15,209)
Purchase of treasury stock	(59,386)					(4,500)							(54,886)
Forfeitures of equity awards, net of issuances	593					521							72
Recognition of equity-based compensation	2,817					2,817
Sale of treasury stock	184					95							89
Exercise of stock options	2,270					392							1,878
Ending Balance at Mar. 31, 2020	2,663,441			55,057		1,073,089		1,646,751			219,390		(330,846)
Beginning Balance at Dec. 31, 2020	3,016,948			55,057		1,090,450		1,891,246			318,340		(338,145)
Total comprehensive income (loss)	(56,500)							92,643			(149,143)
Dividends	(15,571)							(15,571)
Purchase of treasury stock	(4,027)												(4,027)
Forfeitures of equity awards, net of issuances	695					(4,043)							4,738
Recognition of equity-based compensation	4,457					4,457
Sale of treasury stock	151					65							86
Exercise of stock options	12,086					2,738							9,348
Ending Balance at Mar. 31, 2021	$ 2,958,239			$ 55,057		$ 1,093,667		$ 1,968,318			$ 169,197		$ (328,000)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Stockholders Equity [Abstract]
Dividends, per share	$ 0.32	$ 0.31

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING ACTIVITIES
Net income (loss)	$ 92,643	$ (3,439)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for credit losses	(7,500)	88,000
Net amortization (accretion) of premiums and discounts from acquisition	117	(275)
Depreciation and amortization	14,042	15,591
Amortization of debt issuance costs	113
Deferred income tax expense (benefit)	10,246	(11,134)
Net increase in trading securities and other earning assets	(9,350)	(15,559)
Losses (gains) on investment securities, net	8,336	(3,520)
Gains on sales of assets	(4,298)	(1,922)
Amortization of securities premiums, net of discount accretion	14,876	8,792
Originations of loans held for sale	(45,128)	(77,129)
Gains on sales of loans held for sale, net	(1,602)	(320)
Proceeds from sales of loans held for sale	43,163	75,667
Equity-based compensation	5,152	3,410
Net tax benefit related to equity compensation plans	1,079	312
Changes in:
Accrued income	4,156	12,629
Accrued expenses and taxes	(88,201)	(2,803)
Other assets and liabilities, net	78,096	(79,008)
Net cash provided by operating activities	115,940	9,292
Securities held to maturity:
Maturities, calls and principal repayments	49,520	19,497
Purchases	(77,576)	(17,555)
Securities available for sale:
Sales	129,128	84,439
Maturities, calls and principal repayments	520,441	310,159
Purchases	(1,322,855)	(421,966)
Equity securities with readily determinable fair values:
Purchases	(226)
Equity securities without readily determinable fair values:
Maturities, calls and principal repayments	2,177	3,725
Purchases	(7,144)	(1,081)
Payment on low-income housing tax credit investment commitments	(1,173)	(4,039)
Net increase in loans	(398,795)	(525,091)
Net decrease in fed funds sold and resell agreements	20,522	793,595
Net cash activity from acquisitions and divestitures	16,623	24
Net increase in interest-bearing balances due from other financial institutions	(11,347)	(1,274)
Purchases of premises and equipment	(5,958)	(17,652)
Proceeds from sales of premises and equipment	73	8,389
Proceeds from bank-owned and company-owned life insurance death benefit		19
Net cash (used in) provided by investing activities	(1,086,590)	231,189
FINANCING ACTIVITIES
Net increase (decrease) in demand and savings deposits	1,441,071	(186,380)
Net decrease in time deposits	(211,530)	(241,344)
Net increase (decrease) in fed funds purchased and repurchase agreements	444,321	(5,591)
Proceeds from short-term debt		15,000
Cash dividends paid	(15,456)	(15,150)
Proceeds from exercise of stock options and sales of treasury shares	12,237	2,454
Purchases of treasury stock	(4,027)	(59,386)
Net cash provided by (used in) financing activities	1,666,616	(490,397)
Increase (decrease) in cash and cash equivalents	695,966	(249,916)
Cash and cash equivalents at beginning of period	3,497,566	1,669,170
Cash and cash equivalents at end of period	4,193,532	1,419,254
Supplemental disclosures:
Income tax payments (refunds)	622	(1,530)
Total interest payments	$ 14,337	42,134
Noncash disclosures:
Acquisition of low-income housing tax credit investments		27,834
Commitment to fund low-income housing tax credit investments		$ 27,834

Financial Statement Presentatio

Financial Statement Presentation	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Financial Statement Presentation	1. Financial Statement Presentation The Consolidated Financial Statements include the accounts of UMB Financial Corporation and its subsidiaries (collectively, the Company) after the elimination of all intercompany transactions. In the opinion of management of the Company, all adjustments relating to items that are of a normal recurring nature and necessary for a fair presentation of the financial position and results of operations have been made. The results of operations and cash flows for the interim periods presented may not be indicative of the results of the full year ending December 31, 2021. The financial statements should be read in conjunction with “Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations” within this Quarterly Report on Form 10-Q (the Form 10-Q) and in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, filed with the Securities and Exchange Commission (SEC) on March 1, 2021 (the Form 10-K). The Company is a financial holding company, which offers a wide range of banking and other financial services to its customers through its branches and offices. The Company’s national bank, UMB Bank, National Association (the Bank), has its principal office in Missouri and also has branches in Arizona, Colorado, Illinois, Kansas, Nebraska, Oklahoma, and Texas. The Company also has offices in Pennsylvania, South Dakota, Indiana, Utah, Minnesota, California, and Wisconsin.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. These estimates and assumptions also impact reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. A summary of the significant accounting policies to assist the reader in understanding the financial presentation is provided in the Notes to Consolidated Financial Statements in the Form 10-K. Cash and cash equivalents Cash and cash equivalents includes Cash and due from banks and amounts due from the Federal Reserve Bank (FRB). Cash on hand, cash items in the process of collection, and amounts due from correspondent banks are included in Cash and due from banks. Amounts due from the FRB are interest-bearing for all periods presented and are included in the Interest-bearing due from banks line on the Company’s Consolidated Balance Sheets. This table provides a summary of cash and cash equivalents as presented on the Consolidated Statements of Cash Flows as of March 31, 2021 and March 31, 2020 (in thousands) March 31, 2021 2020 Due from the FRB $ 3,806,302 $ 1,078,701 Cash and due from banks 387,230 340,553 Cash and cash equivalents at end of period $ 4,193,532 $ 1,419,254 Also included in the Interest-bearing due from banks, but not considered cash and cash equivalents, are interest-bearing accounts held at other financial institutions, which totaled $54.5 million and $30.6 million at March 31, 2021 and March 31, 2020, respectively. Per Share Data Basic net income (loss) per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted quarter-to-date net income per share includes the dilutive effect of 424,109 shares issuable upon the exercise of stock options , nonvested restricted shares, and nonvested restricted stock units granted by the Company and outstanding at March 31, 2021 . Basic and diluted net loss per share were the same at March 31, 2020 as the impact of all potentially dilutive shares was anti-dilutive. Certain options, restricted stock and restricted stock units issued under employee benefits plans were excluded from the computation of diluted earnings per share because they were anti-dilutive. At March 31, 2021, there were no outstanding stock options, restricted stock and restricted stock units excluded from the computation of diluted income per share. At March 31, 2020, all outstanding options, restricted stock and restricted stock units were excluded. Derivatives The Company records all derivatives on the Consolidated Balance Sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Currently, seven of the Company’s derivatives are designated in qualifying hedging relationships. However, the remainder of the Company’s derivatives are not designated in qualifying hedging relationships, as the derivatives are not used to manage risks within the Company’s assets or liabilities. All changes in fair value of the Company’s non-designated derivatives and fair value hedges are recognized directly in earnings. Changes in fair value of the Company’s cash flow hedges are recognized in accumulated other comprehensive income (AOCI) and are reclassified to earnings when the hedged transaction affects earnings.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Accounting Changes And Error Corrections [Abstract]
New Accounting Pronouncements	3. New Accounting Pronouncements Credit Losses In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments.” In April and November 2019, the FASB issued implementation amendments to the June 2016 ASU (collectively, the amended guidance). The amended guidance replaced the current incurred loss methodology for recognizing credit losses with a current expected credit loss (CECL) model, which requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The amended guidance broadened the information that an entity must consider in developing its expected credit loss estimates. Additionally, the updates amended the accounting for credit losses for available-for-sale debt securities and purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. The amended guidance required enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of a company’s loan portfolio. The Company adopted the amended guidance on January 1, 2020 using a modified retrospective approach for adoption. Upon adoption, the Company recorded a cumulative effect adjustment to the Company’s Consolidated Balance Sheets of $9.0 million as increase to the allowance for credit losses and $7.0 million as a reduction to retained earnings, net of deferred tax balances. See Note 4, “Loans and Allowance for Credit Losses” for related disclosures

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans and Allowance for Credit Losses	4. Loans and Allowance for Credit Losses Loan Origination/Risk Management The Company has certain lending policies and procedures in place that are designed to minimize the level of risk within the loan portfolio. Diversification of the loan portfolio manages the risk associated with fluctuations in economic conditions. Authority levels are established for the extension of credit to ensure consistency throughout the Company. It is necessary that policies, processes and practices implemented to control the risks of individual credit transactions and portfolio segments are sound and adhered to. The Company maintains an independent loan review department that reviews and validates the risk assessment on a continual basis. Management regularly evaluates the results of the loan reviews. The loan review process complements and reinforces the risk identification and assessment decisions made by lenders and credit personnel, as well as the Company’s policies and procedures. Commercial and industrial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and prudently expand its business. Commercial loans are made based on the identified cash flows of the borrower and on the underlying collateral provided by the borrower. The cash flows of the borrower, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts from its customers. Specialty lending loans include Asset-based and Factoring loans. Asset-based loans are offered primarily in the form of revolving lines of credit to commercial borrowers that do not generally qualify for traditional bank financing. Asset-based loans are underwritten based primarily upon the value of the collateral pledged to secure the loan, rather than on the borrower’s general financial condition. The Company utilizes pre-loan due diligence techniques, monitoring disciplines, and loan management practices common within the asset-based lending industry to underwrite loans to these borrowers. Factoring loans provide working capital through the purchase and/or financing of accounts receivable to borrowers in the transportation industry and to commercial borrowers that do not generally qualify for traditional bank financing. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans, in addition to those of real estate loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts, and the repayment of these loans is largely dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. The Company requires that an appraisal of the collateral be made at origination and on an as-needed basis, in conformity with current market conditions and regulatory requirements. The underwriting standards address both owner and non-owner occupied real estate. Also included in Commercial real estate are Construction loans that are underwritten using feasibility studies, independent appraisal reviews, sensitivity analysis or absorption and lease rates, and financial analysis of the developers and property owners. Construction loans are based upon estimates of costs and value associated with the complete project. Construction loans often involve the disbursement of substantial funds with repayment substantially dependent on the success of the ultimate project. Sources of repayment for these types of loans may be pre-committed permanent loans, sales of developed property or an interim loan commitment from the Company until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their repayment being sensitive to interest rate changes, governmental regulation of real property, economic conditions, and the availability of long-term financing. Consumer real estate loans, including residential real estate and home equity loans, are underwritten based on the borrower’s loan-to-value percentage, collection remedies, and overall credit history. Consumer loans are underwritten based on the borrower’s repayment ability. The Company monitors delinquencies on all of its consumer loans and leases. The underwriting and review practices combined with the relatively small loan amounts that are spread across many individual borrowers, minimizes risk. Consumer loans and leases that are 90 days past due or more are considered non-performing. Credit cards include both commercial and consumer credit cards. Commercial credit cards are generally unsecured and are underwritten with criteria similar to commercial loans, including an analysis of the borrower’s cash flow, available business capital, and overall creditworthiness of the borrower. Consumer credit cards are underwritten based on the borrower’s repayment ability. The Company monitors delinquencies on all of its consumer credit cards and periodically reviews the distribution of FICO scores relative to historical periods to monitor credit risk on its consumer credit card loans. Credit risk is a potential loss resulting from nonpayment of either the primary or secondary exposure. Credit risk is mitigated with formal risk management practices and a thorough initial credit-granting process including consistent underwriting standards and approval process. Control factors or techniques to minimize credit risk include knowing the client, understanding total exposure, analyzing the client and debtor’s financial capacity, and monitoring the client’s activities. Credit risk and portions of the portfolio risk are managed through concentration considerations, average risk ratings, and other aggregate characteristics. Loan Aging Analysis This table provides a summary of loan classes and an aging of past due loans at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 30-89 Days Past Due and Accruing Greater than 90 Days Past Due and Accruing Nonaccrual Loans Total Past Due Current Total Loans Loans Commercial and industrial $ 3,156 $ 66 $ 30,181 $ 33,403 $ 7,136,002 $ 7,169,405 Specialty lending — — 19,083 19,083 501,693 520,776 Commercial real estate 12,335 183 21,297 33,815 6,116,539 6,150,354 Consumer real estate 1,610 111 5,372 7,093 1,992,647 1,999,740 Consumer 196 173 73 442 120,055 120,497 Credit cards 1,563 1,240 700 3,503 353,003 356,506 Leases and other — — — — 180,107 180,107 Total loans $ 18,860 $ 1,773 $ 76,706 $ 97,339 $ 16,400,046 $ 16,497,385 December 31, 2020 30-89 Days Past Due and Accruing Greater than 90 Days Past Due and Accruing Nonaccrual Loans Total Past Due Current Total Loans Loans Commercial and industrial $ 4,652 $ 319 $ 33,769 $ 38,740 $ 7,023,334 $ 7,062,074 Specialty lending — — 19,437 19,437 491,863 511,300 Commercial real estate 2,351 225 28,386 30,962 5,877,972 5,908,934 Consumer real estate 524 — 5,345 5,869 1,939,625 1,945,494 Consumer 281 120 88 489 117,497 117,986 Credit cards 2,061 1,288 798 4,147 362,821 366,968 Leases and other — — — — 190,895 190,895 Total loans $ 9,869 $ 1,952 $ 87,823 $ 99,644 $ 16,004,007 $ 16,103,651 The Company sold consumer real estate loans with proceeds of $43.2 million and $75.7 million in the secondary market without recourse during the three months ended March 31, 2021 and 2020, respectively. The Company has ceased the recognition of interest on loans with a carrying value of $76.7 million and $87.8 million at March 31, 2021 and December 31, 2020, respectively. Restructured loans totaled $7.9 million and $10.8 million at March 31, 2021 and December 31, 2020, respectively. Loans 90 days past due and still accruing interest amounted to $1.8 million and $2.0 million at March 31, 2021 and December 31, 2020, respectively. All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. There was an insignificant amount of interest reversed related to loans on nonaccrual during 2021. Nonaccrual loans with no related allowance for credit losses totaled $34.1 million and $42.1 million at March 31, 2021 and December 31, 2020, respectively. The following tables provide the amortized cost of nonaccrual loans with no related allowance for credit losses by loan class at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Nonaccrual Loans Amortized Cost of Nonaccrual Loans with no related Allowance Loans Commercial and industrial $ 30,181 $ 11,060 Specialty lending 19,083 1,674 Commercial real estate 21,297 15,221 Consumer real estate 5,372 5,372 Consumer 73 73 Credit cards 700 700 Total loans $ 76,706 $ 34,100 December 31, 2020 Nonaccrual Loans Amortized Cost of Nonaccrual Loans with no related Allowance Loans Commercial and industrial $ 33,769 $ 9,916 Specialty lending 19,437 242 Commercial real estate 28,386 25,733 Consumer real estate 5,345 5,345 Consumer 88 88 Credit cards 798 798 Total loans $ 87,823 $ 42,122 Amortized Cost The following tables provide a summary of the amortized cost balance of each of the Company’s loan classes disaggregated by collateral type and origination year as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Loan Segment and Type Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Commercial and industrial: Equipment/Accounts Receivable/Inventory $ 1,054,638 $ 2,369,843 $ 637,469 $ 453,289 $ 173,635 $ 202,850 $ 2,115,942 $ 5,626 $ 7,013,292 Agriculture 2,962 8,070 4,753 1,571 2,422 1,881 122,856 — 144,515 Overdrafts — — — — — — 11,598 — 11,598 Total Commercial and industrial 1,057,600 2,377,913 642,222 454,860 176,057 204,731 2,250,396 5,626 7,169,405 Specialty lending: Asset-based lending 2,387 61,950 — — — — 303,994 — 368,331 Factoring — — — — — — 152,445 — 152,445 Total Specialty lending 2,387 61,950 — — — — 456,439 — 520,776 Commercial real estate: Owner-occupied 120,177 583,506 315,070 252,097 156,162 263,986 18,297 3,639 1,712,934 Non-owner-occupied 465,337 705,983 660,048 209,190 126,261 386,854 21,639 116,001 2,691,313 Farmland 30,449 284,001 35,557 29,720 29,150 48,835 36,470 — 494,182 5+ Multi-family 4,871 228,665 106,403 2,669 3,816 39,504 1,820 — 387,748 1-4 Family construction — — — — — — 39,046 — 39,046 General construction 9,157 20,063 3,004 1,144 398 365 791,000 — 825,131 Total Commercial real estate 629,991 1,822,218 1,120,082 494,820 315,787 739,544 908,272 119,640 6,150,354 Consumer real estate: HELOC 11,893 81,980 9,813 3,745 34 2,527 252,275 192 362,459 First lien: 1-4 family 171,257 873,810 282,568 75,864 79,744 133,202 356 — 1,616,801 Junior lien: 1-4 family 1,274 8,051 5,813 2,024 1,006 2,036 276 — 20,480 Total Consumer real estate 184,424 963,841 298,194 81,633 80,784 137,765 252,907 192 1,999,740 Consumer: Revolving line — — — — — — 66,690 — 66,690 Auto 3,155 11,496 8,742 2,431 1,296 663 — — 27,783 Other 1,826 4,309 2,686 1,883 187 1,044 14,089 — 26,024 Total Consumer 4,981 15,805 11,428 4,314 1,483 1,707 80,779 — 120,497 Credit cards: Consumer — — — — — — 172,816 — 172,816 Commercial — — — — — — 183,690 — 183,690 Total Credit cards — — — — — — 356,506 — 356,506 Leases and other: Leases — — 915 — 787 679 — — 2,381 Other 628 31,742 9,410 6,553 2,128 1,467 125,798 — 177,726 Total Leases and other 628 31,742 10,325 6,553 2,915 2,146 125,798 — 180,107 Total loans $ 1,880,011 $ 5,273,469 $ 2,082,251 $ 1,042,180 $ 577,026 $ 1,085,893 $ 4,431,097 $ 125,458 $ 16,497,385 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Loan Segment and Type Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Commercial and industrial: Equipment/Accounts Receivable/Inventory $ 3,185,589 $ 684,488 $ 471,950 $ 185,167 $ 178,576 $ 69,599 $ 2,108,799 $ — $ 6,884,168 Agriculture 8,886 6,495 1,976 3,651 2,164 416 137,955 38 161,581 Overdrafts — — — — — — 16,325 — 16,325 Total Commercial and industrial 3,194,475 690,983 473,926 188,818 180,740 70,015 2,263,079 38 7,062,074 Specialty lending: Asset-based lending 64,258 — — — — — 291,091 — 355,349 Factoring — — — — — — 155,951 — 155,951 Total Specialty lending 64,258 — — — — — 447,042 — 511,300 Commercial real estate: Owner-occupied 579,212 334,098 233,192 170,913 120,603 176,377 18,880 51,910 1,685,185 Non-owner-occupied 846,030 630,457 230,549 169,193 333,215 115,753 49,384 97,954 2,472,535 Farmland 297,788 37,288 31,454 37,485 28,925 29,480 40,043 — 502,463 5+ Multi-family 190,922 80,293 2,835 32,498 39,802 6,298 2,418 94,789 449,855 1-4 Family construction 144 — — — — — 30,131 — 30,275 General construction 20,452 3,082 1,215 514 358 2,738 733,952 6,310 768,621 Total Commercial real estate 1,934,548 1,085,218 499,245 410,603 522,903 330,646 874,808 250,963 5,908,934 Consumer real estate: HELOC 82,410 11,236 4,263 241 63 2,561 294,390 5 395,169 First lien: 1-4 family 896,676 304,017 83,429 87,927 78,458 75,408 2,579 — 1,528,494 Junior lien: 1-4 family 9,142 6,383 2,360 1,247 948 1,470 281 — 21,831 Total Consumer real estate 988,228 321,636 90,052 89,415 79,469 79,439 297,250 5 1,945,494 Consumer: Revolving line — — — — — — 65,215 — 65,215 Auto 12,470 9,846 2,960 1,645 680 348 — — 27,949 Other 5,017 3,200 2,131 216 1,005 172 13,081 — 24,822 Total Consumer 17,487 13,046 5,091 1,861 1,685 520 78,296 — 117,986 Credit cards: Consumer — — — — — — 188,681 — 188,681 Commercial — — — — — — 178,287 — 178,287 Total Credit cards — — — — — — 366,968 — 366,968 Leases and other: Leases — 915 — 787 — 711 — — 2,413 Other 33,626 10,758 7,659 2,611 1,323 646 131,859 — 188,482 Total Leases and other 33,626 11,673 7,659 3,398 1,323 1,357 131,859 — 190,895 Total loans $ 6,232,622 $ 2,122,556 $ 1,075,973 $ 694,095 $ 786,120 $ 481,977 $ 4,459,302 $ 251,006 $ 16,103,651 Accrued interest on loans totaled $60.8 million and $58.8 million as of March 31, 2021 and December 31, 2020, respectively, and is included in the Accrued income line on the Company’s Consolidated Balance Sheets. The total amount of accrued interest is excluded from the amortized cost basis of loans presented above. Further, the Company has elected not to measure an allowance for credit losses for accrued interest receivable. Credit Quality Indicators As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including trends related to the risk grading of specified classes of loans, net charge-offs, non-performing loans, and general economic conditions. The Company utilizes a risk grading matrix to assign a rating to each of its commercial, commercial real estate, and construction real estate loans. Changes in credit risk are monitored on a continuous basis and changes in risk ratings are made when identified. The loan ratings are summarized into the following categories: Non-watch list, Watch, Special Mention, Substandard, and Doubtful. Any loan not classified in one of the categories described below is considered to be a Non-watch list loan. A description of the general characteristics of the loan rating categories is as follows: • Watch – This rating represents credit exposure that presents higher than average risk and warrants greater than routine attention by Company personnel due to conditions affecting the borrower, the borrower’s industry or the economic environment. These conditions have resulted in some degree of uncertainty that results in higher than average credit risk. These loans are considered pass-rated credits. • Special Mention – This rating reflects a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or the borrower’s credit position at some future date. The rating is not adversely classified and does not expose an institution to sufficient risk to warrant adverse classification. • Substandard – This rating represents an asset inadequately protected by the current sound worth and paying capacity of the borrower or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Loans in this category are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified as substandard. • Doubtful – This rating represents an asset that has all the weaknesses inherent in an asset classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, based on currently existing facts, conditions and values, highly questionable and improbable. The possibility of loss is extremely high, but because of certain important and reasonably specific pending factors, which may work to the advantage of strengthening the asset, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, liquidation procedures, capital injection, or perfecting liens. Commercial and industrial A discussion of the credit quality indicators that impact each type of collateral securing Commercial and industrial loans is included below: Equipment, accounts receivable, and inventory General commercial and industrial loans are secured by working capital assets and non-real estate assets. The general purpose of these loans is for financing capital expenditures and current operations for commercial and industrial entities. These assets are short-term in nature. In the case of accounts receivable and inventories, the repayment of debt is reliant upon converting assets into cash or through goods and services being sold and collected. Collateral based-risk is due to aged short-term assets, which can be indicative of underlying issues with the borrower and lead to the value of the collateral being overstated. Agriculture Agricultural loans are secured by non-real estate agricultural assets. These include shorter-term assets such as equipment, crops, and livestock. The risks associated with loans to finance crops or livestock include the borrower’s ability to successfully raise and market the commodity. Adverse weather conditions and other natural perils can dramatically affect farmers’ or ranchers’ production and ability to service debt. Volatile commodity prices present another significant risk for agriculture borrowers. Market price volatility and production cost volatility can affect both revenues and expenses. Overdrafts Commercial overdrafts are typically short-term and unsecured. Some commercial borrowers tie their overdraft obligation to their line of credit, so any draw on the line of credit will satisfy the overdraft. Based on the factors noted above for each type of collateral, the Company assigns risk ratings to borrowers based on their most recently assessed financial position. The following tables provide a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Equipment/Accounts Receivable/Inventory Non-watch list – Pass $ 929,053 $ 2,249,057 $ 622,060 $ 429,748 $ 154,191 $ 188,618 $ 1,983,266 $ 5,626 $ 6,561,619 Watch – Pass 52,371 86,080 15,178 14,817 11,005 11,865 67,607 — 258,923 Special Mention 35,006 3,851 — 1,384 1,893 1,456 5,949 — 49,539 Substandard 38,208 30,769 231 3,866 1,346 911 59,120 — 134,451 Doubtful — 86 — 3,474 5,200 — — — 8,760 Total Equipment/Accounts Receivable/Inventory $ 1,054,638 $ 2,369,843 $ 637,469 $ 453,289 $ 173,635 $ 202,850 $ 2,115,942 $ 5,626 $ 7,013,292 Agriculture Non-watch list – Pass $ 2,907 $ 7,360 $ 3,688 $ 984 $ 686 $ 1,690 $ 81,256 $ — $ 98,571 Watch – Pass 55 124 578 188 102 142 14,278 — 15,467 Special Mention — 273 487 399 22 — 8,480 — 9,661 Substandard — 313 — — 1,612 49 18,842 — 20,816 Doubtful — — — — — — — — — Total Agriculture $ 2,962 $ 8,070 $ 4,753 $ 1,571 $ 2,422 $ 1,881 $ 122,856 $ — $ 144,515 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Equipment/Accounts Receivable/Inventory Non-watch list – Pass $ 2,975,305 $ 664,016 $ 439,460 $ 171,409 $ 165,321 $ 67,442 $ 1,948,261 $ — $ 6,431,214 Watch – Pass 89,746 10,400 9,309 5,126 11,044 1,592 70,768 — 197,985 Special Mention 53,334 9,788 15,524 1,898 2,158 — 8,485 — 91,187 Substandard 67,118 231 7,657 1,369 53 565 81,246 — 158,239 Doubtful 86 53 — 5,365 — — 39 — 5,543 Total Equipment/Accounts Receivable/Inventory $ 3,185,589 $ 684,488 $ 471,950 $ 185,167 $ 178,576 $ 69,599 $ 2,108,799 $ — $ 6,884,168 Agriculture Non-watch list – Pass $ 7,880 $ 3,924 $ 1,389 $ 1,379 $ 1,759 $ 404 $ 92,917 $ 38 $ 109,690 Watch – Pass 179 2,571 188 102 345 — 17,956 — 21,341 Special Mention 303 — 399 22 — 12 6,674 — 7,410 Substandard 524 — — 2,148 60 — 20,408 — 23,140 Doubtful — — — — — — — — — Total Agriculture $ 8,886 $ 6,495 $ 1,976 $ 3,651 $ 2,164 $ 416 $ 137,955 $ 38 $ 161,581 Specialty lending A discussion of the credit quality indicators that impact each type of collateral securing Specialty loans is included below: Asset-based lending General asset-based loans are secured by accounts receivable, inventory, equipment, and real estate. The purpose of these loans is for financing current operations for commercial customers. The repayment of debt is reliant upon collection of the accounts receivable within 30 to 90 days or converting assets into cash or through goods and services being sold and collected. The Company tracks each individual borrower credit risk based on their loan to collateral position. Any borrower position where the underlying value of collateral is below the fair value of the loan is considered out-of-margin and inherently higher risk. Factoring General factoring loans are secured by accounts receivable. The purpose of these loans is for financing current operations for trucking or other commercial customers. The repayment of debt is reliant upon collection of the accounts receivable within 30 to 90 days. The Company tracks each individual borrower’s credit risk based on their loan to collateral position. To assess credit risk, the portfolio is separated into two tiers and a specifically impaired category. Tier 1 are loans that have not experienced collateral coverage rates falling below an internally tracked threshold at any time during their relationship history. The internal threshold is lower than each customers’ actual contractual collateral coverage ratio. Tier 2 are loans that have experienced collateral coverage rates falling below the same internally tracked threshold during their relationship history. Loans individually evaluated are loans that have either experienced collateral coverage rates falling below an internally tracked threshold during their relationship history or have balances that are greater than an internally tracked threshold. Individually evaluated loans utilize a practical expedient for the purpose of determining the expected credit loss. Collateral dependent assets are loans placed on non-accrual and loans considered to be TDRs. The combination of these categories has created an associated allowance to this portfolio of $0.6 million at both March 31, 2021 and December 31, 2020. The following table provides a summary of the amortized cost balance by risk rating for asset-based loans as of March 31, 2021 and December 31, 2020 (in thousands): Asset-based lending Risk March 31, 2021 December 31, 2020 In-margin $ 350,922 $ 331,360 Out-of-margin 17,409 23,989 Total $ 368,331 $ 355,349 The following table provides a summary of the amortized cost balance by risk rating for factoring loans as of March 31, 2021 and December 31, 2020 (in thousands): Factoring Risk March 31, 2021 December 31, 2020 Tier 1 $ 7,144 $ 10,774 Tier 2 56,461 135,861 Individually evaluated 87,400 7,755 Collateral dependent assets 1,440 1,561 Total $ 152,445 $ 155,951 Commercial real estate A discussion of the credit quality indicators that impact each type of collateral securing Commercial real estate loans is included below: Owner-occupied Owner-occupied loans are secured by commercial real estate. These loans are often longer tenured and susceptible to multiple economic cycles. The loans rely on the owner-occupied operations to service debt which cover a broad spectrum of industries. Real estate debt can carry a significant amount of leverage for a borrower to maintain. Non-owner-occupied Non-owner-occupied loans are secured by commercial real estate. These loans are often longer tenured and susceptible to multiple economic cycles. The key element of risk in this type of lending is the cyclical nature of real estate markets. Although national conditions affect the overall real estate industry, the effect of national conditions on local markets is equally important. Factors such as unemployment rates, consumer demand, household formation, and the level of economic activity can vary widely from state to state and among metropolitan areas. In addition to geographic considerations, markets can be defined by property type. While all sectors are influenced by economic conditions, some sectors are more sensitive to certain economic factors than others. Farmland Farmland loans are secured by real estate used for agricultural purposes such as crop and livestock production. Assets used as collateral are long-term assets that carry the ability to have longer amortizations and maturities. Longer terms carry the risk of added susceptibility to market conditions. The limited purpose of some Agriculture-related collateral affects credit risk because such collateral may have limited or no other uses to support values when loan repayment problems emerge. 5+ Multi-family 5+ multi-family loans are secured by a multi-family residential property. The primary risks associated with this type of collateral are largely driven by economic conditions. The national and local market conditions can change with unemployment rates or competing supply of multi-family housing. Tenants may not be able to afford their housing or have better options and this can result in increased vacancy. Rents may need to be lowered to fill apartment units. Increased vacancy and lower rental rates not only drive the borrower’s ability to repay debt but also contribute to how the collateral is valued. 1-4 Family construction 1-4 family construction loans are secured by 1-4 family residential real estate and are in the process of construction or improvements being made. The predominant risk inherent to this portfolio is the risk associated with a borrower’s ability to successfully complete a project on time and within budget. Market conditions also play an important role in understanding the risk profile. Risk from adverse chang es in market conditions from the start of development to completion can result in deflated collateral values General construction General construction loans are secured by commercial real estate in process of construction or improvements being made and their repayment is dependent on the collateral’s completion. Construction lending presents unique risks not encountered in term financing of existing real estate. The predominant risk inherent to this portfolio is the risk associated with a borrower’s ability to successfully complete a project on time and within budget. Commercial properties under construction are susceptible to market and economic conditions. Demand from prospective customers may erode after construction begins because of a general economic slowdown or an increase in the supply of competing properties. Based on the factors noted above for each type of collateral, the Company assigns risk ratings to borrowers based on their most recently assessed financial position. The following tables provide a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Owner-occupied Non-watch list – Pass $ 119,343 $ 574,043 $ 306,753 $ 245,581 $ 127,363 $ 247,605 $ 14,023 $ 3,639 $ 1,638,350 Watch – Pass — 2,335 8,217 5,729 1,181 10,254 568 — 28,284 Special Mention 106 1,394 — — — 2,564 — — 4,064 Substandard 728 5,734 100 787 27,618 3,563 3,706 — 42,236 Doubtful — — — — — — — — — Total Owner-occupied $ 120,177 $ 583,506 $ 315,070 $ 252,097 $ 156,162 $ 263,986 $ 18,297 $ 3,639 $ 1,712,934 Non-owner-occupied Non-watch list – Pass $ 431,837 $ 695,641 $ 547,676 $ 184,201 $ 120,831 $ 334,679 $ 21,639 $ 116,001 $ 2,452,505 Watch – Pass 33,500 1,326 60,675 24,989 5,430 9,530 — — 135,450 Special Mention — 9,016 25,187 — — 41,335 — — 75,538 Substandard — — 26,510 — — 1,310 — — 27,820 Doubtful — — — — — — — — — Total Non-owner-occupied $ 465,337 $ 705,983 $ 660,048 $ 209,190 $ 126,261 $ 386,854 $ 21,639 $ 116,001 $ 2,691,313 Farmland Non-watch list – Pass $ 10,019 $ 237,511 $ 26,282 $ 15,149 $ 22,288 $ 18,170 $ 17,976 $ — $ 347,395 Watch – Pass 6,413 20,732 8,720 13,404 4,523 23,843 15,887 — 93,522 Special Mention — — 303 630 2,339 4,890 476 — 8,638 Substandard 14,017 25,758 252 537 — 1,932 2,131 — 44,627 Doubtful — — — — — — — — — Total Farmland $ 30,449 $ 284,001 $ 35,557 $ 29,720 $ 29,150 $ 48,835 $ 36,470 $ — $ 494,182 5+ Multi-family Non-watch list – Pass $ 4,871 $ 228,665 $ 82,373 $ 2,669 $ 2,499 $ 39,504 $ 1,820 $ — $ 362,401 Watch – Pass — — 21,597 — — — — — 21,597 Special Mention — — — — — — — — — Substandard — — 2,433 — 1,317 — — — 3,750 Doubtful — — — — — — — — — Total 5+ Multi-family $ 4,871 $ 228,665 $ 106,403 $ 2,669 $ 3,816 $ 39,504 $ 1,820 $ — $ 387,748 1-4 Family construction Non-watch list – Pass $ — $ — $ — $ — $ — $ — $ 39,046 $ — $ 39,046 Watch – Pass — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total 1-4 Family construction $ — $ — $ — $ — $ — $ — $ 39,046 $ — $ 39,046 General construction Non-watch list – Pass $ 9,157 $ 20,063 $ 2,918 $ 1,144 $ 398 $ 365 $ 787,683 $ — $ 821,728 Watch – Pass — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — 3,317 — 3,317 Doubtful — — 86 — — — — — 86 Total General construction $ 9,157 $ 20,063 $ 3,004 $ 1,144 $ 398 $ 365 $ 791,000 $ — $ 825,131 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Owner-occupied Non-watch list – Pass $ 568,636 $ 327,579 $ 227,581 $ 141,758 $ 118,593 $ 163,292 $ 15,052 $ 51,910 $ 1,614,401 Watch – Pass 1,712 6,413 4,761 1,194 — 8,581 — — 22,661 Special Mention 1,424 — — — 1,588 — — — 3,012 Substandard 7,440 106 850 27,961 422 4,504 3,828 — 45,111 Doubtful — — — — — — — — — Total Owner-occupied $ 579,212 $ 334,098 $ 233,192 $ 170,913 $ 120,603 $ 176,377 $ 18,880 $ 51,910 $ 1,685,185 Non-owner-occupied Non-watch list – Pass $ 802,078 $ 525,246 $ 205,484 $ 156,290 $ 294,979 $ 101,616 $ 49,384 $ 81,499 $ 2,216,576 Watch – Pass 43,769 45,748 25,065 12,903 1,936 7,701 — 16,455 153,577 Special Mention 183 32,953 — — 36,300 5,100 — — 74,536 Substandard — 26,510 — — — 1,336 — — 27,846 Doubtful — — — — — — — — — Total Non-owner-occupied $ 846,030 $ 630,457 $ 230,549 $ 169,193 $ 333,215 $ 115,753 $ 49,384 $ 97,954 $ 2,472,535 Farmland Non-watch list – Pass $ 237,124 $ 27,815 $ 15,907 $ 26,071 $ 13,376 $ 8,924 $ 19,074 $ — $ 348,291 Watch – Pass 20,992 9,221 13,404 5,133 6,301 19,835 17,699 — 92,585 Special Mention — —

Securities

Securities	3 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Securities	5. Securities Securities Available for Sale This table provides detailed information about securities available for sale at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury $ 49,137 $ 687 $ (345 ) $ 49,479 U.S. Agencies 89,474 5,431 — 94,905 Mortgage-backed 5,928,662 140,503 (79,559 ) 5,989,606 State and political subdivisions 3,391,669 146,951 (15,679 ) 3,522,941 Corporates 93,455 3,191 (185 ) 96,461 Total $ 9,552,397 $ 296,763 $ (95,768 ) $ 9,753,392 December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury $ 29,911 $ 829 $ — $ 30,740 U.S. Agencies 89,554 6,395 — 95,949 Mortgage-backed 5,266,394 202,944 (1,157 ) 5,468,181 State and political subdivisions 3,424,309 199,848 (538 ) 3,623,619 Corporates 77,566 3,649 (16 ) 81,199 Total $ 8,887,734 $ 413,665 $ (1,711 ) $ 9,299,688 The following table presents contractual maturity information for securities available for sale at March 31, 2021 (in thousands): Amortized Fair Cost Value Due in 1 year or less $ 227,526 $ 228,849 Due after 1 year through 5 years 539,250 556,353 Due after 5 years through 10 years 686,132 707,146 Due after 10 years 2,170,827 2,271,438 Total 3,623,735 3,763,786 Mortgage-backed securities 5,928,662 5,989,606 Total securities available for sale $ 9,552,397 $ 9,753,392 Securities may be disposed of before contractual maturities due to sales by the Company or because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. For the three months ended March 31, 2021, proceeds from the sales of securities available for sale were $129.1 million compared to $84.4 million for the same period in 2020. Securities transactions resulted in gross realized gains of $2.7 million and $1.2 million for the three months ended March 31, 2021 and 2020, respectively. There were no gross realized losses for either the three months ended March 31, 2021 or 2020. Securities available for sale with a fair value of $7.3 billion at March 31, 2021 and $7.8 billion at December 31, 2020 were pledged to secure U.S. Government deposits, other public deposits, certain trust deposits, derivative transactions, and repurchase agreements. Of these amounts, securities with a market value of $214.9 million and $371.5 million at March 31, 2021 and Accrued interest on securities available for sale totaled $33.6 million and $42.6 million as of March 31, 2021 and December 31, 2020, respectively, and is included in the Accrued income line on the Company’s Consolidated Balance Sheets. The total amount of accrued interest is excluded from the amortized cost of available for sale securities presented above. Further, the Company has elected not to measure an ACL for accrued interest receivable. The following table shows the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2021 and December 31, 2020 (in thousands): Less than 12 months 12 months or more Total March 31, 2021 Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Description of Securities U.S. Treasury 3 $ 14,161 $ (345 ) — $ — $ — 3 $ 14,161 $ (345 ) U.S. Agencies — — — — — — — — — Mortgage-backed 168 2,871,680 (79,559 ) — — — 168 2,871,680 (79,559 ) State and political subdivisions 519 565,317 (15,477 ) 4 2,531 (202 ) 523 567,848 (15,679 ) Corporates 26 25,524 (185 ) — — — 26 25,524 (185 ) Total 716 $ 3,476,682 $ (95,566 ) 4 $ 2,531 $ (202 ) 720 $ 3,479,213 $ (95,768 ) Less than 12 months 12 months or more Total December 31, 2020 Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Description of Securities U.S. Treasury — $ — $ — — $ — $ — — $ — $ — U.S. Agencies — — — — — — — — — Mortgage-backed 16 174,234 (1,157 ) — — — 16 174,234 (1,157 ) State and political subdivisions 24 55,653 (279 ) 6 2,833 (259 ) 30 58,486 (538 ) Corporates 4 5,335 (16 ) — — — 4 5,335 (16 ) Total 44 $ 235,222 $ (1,452 ) 6 $ 2,833 $ (259 ) 50 $ 238,055 $ (1,711 ) The unrealized losses in the Company’s investments in U.S. Treasury securities, Government Sponsored Entity (GSE) mortgage-backed securities, State and political subdivisions, and Corporates were caused by changes in interest rates, and not from a decline in credit of the underlying issuers. The U.S. Treasury, U.S. Agency, and GSE mortgage-backed securities are all considered to be agency-backed securities with no risk of loss as they are either explicitly or implicitly guaranteed by the U.S. government. The changes in fair value in the agency-backed portfolios are solely driven by change in interest rates caused by changing economic conditions. The Company has no knowledge of any underlying credit issues and the cash flows underlying the debt securities have not changed and are not expected to be impacted by changes in interest rates. For the State and political subdivision portfolio, the majority of the Company’s holdings are in general obligation bonds, which have a very low historical default rate due to issuers generally having unlimited taxing authority to service the debt. For both the State and political subdivision and Corporate portfolios, the Company has a robust process for monitoring credit risk, including both pre-purchase and ongoing post-purchase credit reviews and analysis. The Company monitors credit ratings of all bond issuers in these segments and reviews available financial data, including market and sector trends. As of March 31, 2021 and December 31, 2020, there was no ACL related to the Company’s available for sale securities as the decline in fair value did not result from credit issues. Securities Held to Maturity The following table shows the Company’s held to maturity investments’ amortized cost, fair value, and gross unrealized gains and losses at March 31, 2021 and December 31, 2020, respectively (in thousands): Gross Gross Amortized Unrealized Unrealized Fair March 31, 2021 Cost Gains Losses Value State and political subdivisions: Due in 1 year or less $ 1,372 $ 15 $ — $ 1,387 Due after 1 year through 5 years 121,217 1,703 (137 ) 122,783 Due after 5 years through 10 years 416,437 4,020 (6,858 ) 413,599 Due after 10 years 503,644 1,821 (31,105 ) 474,360 Total state and political subdivisions $ 1,042,670 $ 7,559 $ (38,100 ) $ 1,012,129 Allowance for credit losses (2,959 ) Total state and political subdivisions, net of allowance for credit losses $ 1,039,711 Gross Gross Amortized Unrealized Unrealized Fair December 31, 2020 Cost Gains Losses Value State and political subdivisions: Due in 1 year or less $ 4,907 $ 29 $ — $ 4,936 Due after 1 year through 5 years 123,643 3,402 (144 ) 126,901 Due after 5 years through 10 years 423,759 12,845 (1,566 ) 435,038 Due after 10 years 462,305 13,447 (13,183 ) 462,569 Total state and political subdivisions $ 1,014,614 $ 29,723 $ (14,893 ) $ 1,029,444 Allowance for credit losses (2,610 ) Total state and political subdivisions, net of allowance for credit losses $ 1,012,004 Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. There were no sales of securities held to maturity during the three months ended March 30, 2021 or 2020. The following table shows the Company’s held to maturity investments’ gross unrealized losses and fair value, aggregated by length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2021 and December 31, 2020, respectively (in thousands): Less than 12 months 12 months or more Total March 31, 2021 Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses State and political subdivisions $ 476,985 $ (21,027 ) $ 104,720 $ (17,073 ) $ 581,705 $ (38,100 ) Total $ 476,985 $ (21,027 ) $ 104,720 $ (17,073 ) $ 581,705 $ (38,100 ) Less than 12 months 12 months or more Total December 31, 2020 Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses State and political subdivisions $ 132,271 $ (4,591 ) $ 109,712 $ (10,302 ) $ 241,983 $ (14,893 ) Total $ 132,271 $ (4,591 ) $ 109,712 $ (10,302 ) $ 241,983 $ (14,893 ) The unrealized losses in the Company’s held to maturity portfolio were caused by changes in the interest rate environment. The underlying bonds are evaluated for credit losses in conjunction with management’s estimate of the ACL based on credit rating. The following tables show the amortized cost basis by credit rating of the Company’s held to maturity investments at March 31, 2021 and December 31, 2020 (in thousands): Amortized Cost Basis by Credit Rating - HTM Debt Securities March 31, 2021 A BBB BB CCC-C Total State and political subdivisions: Competitive $ 332,322 $ 596,257 $ 17,079 $ 7,954 $ 953,612 Utilities 56,233 32,825 — — 89,058 Total state and political subdivisions $ 388,555 $ 629,082 $ 17,079 $ 7,954 $ 1,042,670 Amortized Cost Basis by Credit Rating - HTM Debt Securities December 31, 2020 A BBB BB CCC-C Total State and political subdivisions: Competitive $ 340,290 $ 558,786 $ 18,078 $ 8,135 $ 925,289 Utilities 56,232 33,093 — — 89,325 Total state and political subdivisions $ 396,522 $ 591,879 $ 18,078 $ 8,135 $ 1,014,614 Competitive held-to-maturity securities include not-for-profit enterprises that provide public functions such as housing, higher education or healthcare, but do so in a competitive environment. It also includes project financings that can have relatively high enterprise risk, such as deals backed by revenues from sports or convention facilities or start-up transportation ventures. Utilities are public enterprises providing essential services with a monopoly or near-monopoly over the service area. This includes environmental utilities (water, sewer, solid waste), power utilities (electric distribution and generation, gas), and transportation utilities (airports, parking, toll roads, mass transit, ports). All held to maturity securities were current and not past due at March 31, 2021 and December 31, 2020. Accrued interest on securities held to maturity totaled $6.7 million and $5.3 million as March 31, 2021 and December 31, 2020, respectively, and is included in the Accrued income line on the Company’s Consolidated Balance Sheets. The total amount of accrued interest is excluded from the amortized cost of available for sale securities presented above. Further, the Company has elected not to measure an ACL for accrued interest receivable. Trading Securities There were net unrealized losses on trading securities of $40 thousand and net unrealized gains of $150 thousand at March 31, 2021 and 2020, respectively. Net unrealized gains/losses are included in trading and investment banking income on the Company’s Consolidated Statements of Income. Securities sold not yet purchased totaled $ million and $ 2.2 million at March 31 , 20 20 and December 31, 20 20 , respectively, and are classified within the Other liabilities line of the Company’s Consolidated Balance Sheets. Other Securities The table below provides detailed information for Other securities at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 FRB and FHLB stock $ 36,222 $ 33,222 Equity securities with readily determinable fair values 133,979 134,197 Equity securities without readily determinable fair values 128,008 128,634 Total $ 298,209 $ 296,053 Investment in FRB stock is based on the capital structure of the investing bank, and investment in FHLB stock is mainly tied to the level of borrowings from the FHLB. These holdings are carried at cost. Equity securities with readily determinable fair values are generally traded on an exchange and market prices are readily available. Equity securities without readily determinable fair values include equity investments which are held by a subsidiary qualified as a Small Business Investment Company, as well as investments in low-income housing partnerships within the areas the Company serves. As of December 31, 2020, equity securities without readily determinable fair values also included Prairie Capital Management (PCM) alternative investments in hedge funds and private equity funds, which are accounted for as equity-method investments. During the first quarter of 2021, the Company sold its membership interests in PCM. Unrealized gains or losses on equity securities with and without readily determine fair values are recognized in the Investment securities gains, net line of the Company’s Consolidated Statements of Income. Investment Securities (Losses) Gains, Net The table below presents the components of Investments securities (losses) gains, net for the three months ended March 31, 2021 and March 31, 2020 (in thousands): Three Months Ended March 31, 2021 2020 Investment securities (losses) gains, net Available-for-sale debt securities: Gains realized on sales $ 2,720 $ 1,227 Equity securities with readily determinable fair values: Fair value adjustments, net (13,918 ) — Equity securities without readily determinable fair values: Fair value adjustments, net 2,862 2,293 Total investment securities (losses) gains, net $ (8,336 ) $ 3,520

Goodwill and Other Intangibles

Goodwill and Other Intangibles	3 Months Ended
	Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles	6. Goodwill and Other Intangibles Changes in the carrying amount of goodwill for the periods ended March 31, 2021 and December 31, 2020 by reportable segment are as follows (in thousands): Commercial Banking Institutional Banking Personal Banking Total Balances as of January 1, 2021 $ 59,419 $ 51,332 $ 70,116 $ 180,867 Sale of component of business segment — — (6,349 ) (6,349 ) Balances as of March 31, 2021 $ 59,419 $ 51,332 $ 63,767 $ 174,518 Balances as of January 1, 2020 $ 59,419 $ 51,332 $ 70,116 $ 180,867 Balances as of December 31, 2020 $ 59,419 $ 51,332 $ 70,116 $ 180,867 The following table lists the finite-lived intangible assets that continue to be subject to amortization as of March 31, 2021 and December 31, 2020 (in thousands) As of March 31, 2021 Core Deposit Intangible Assets Customer Relationships Total Gross carrying amount $ 50,059 $ 71,167 $ 121,226 Accumulated amortization 49,056 54,377 103,433 Net carrying amount $ 1,003 $ 16,790 $ 17,793 As of December 31, 2020 Core Deposit Intangible Assets Customer Relationships Total Gross carrying amount $ 50,059 $ 89,928 $ 139,987 Accumulated amortization 48,746 70,185 118,931 Net carrying amount $ 1,313 $ 19,743 $ 21,056 On March 31, 2021, the Company sold its membership interests in its Prairie Capital Management, LLC and UMB Merchant Banc, LLC subsidiaries, a component of its Personal Banking segment. The sale included disposition of $6.3 million of goodwill and $1.9 million of net unamortized customer relationship intangibles. The following table has the aggregate amortization expense recognized in each period (in thousands) Three Months Ended March 31, 2021 2020 Aggregate amortization expense $ 1,380 $ 1,734 The following table lists estimated amortization expense of intangible assets in future periods (in thousands): For the nine months ending December 31, 2021 $ 3,377 For the year ending December 31, 2022 3,920 For the year ending December 31, 2023 3,323 For the year ending December 31, 2024 2,704 For the year ending December 31, 2025 2,608

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	3 Months Ended
	Mar. 31, 2021
Federal Funds Purchased And Securities Sold Under Agreements To Repurchase [Abstract]
Securities Sold Under Agreements to Repurchase	7. Securities Sold Under Agreements to Repurchase The Company utilizes repurchase agreements to facilitate the needs of customers and to facilitate secured short-term funding needs. Repurchase agreements are stated at the amount of cash received in connection with the transaction. The Company monitors collateral levels on a continuous basis and may be required to provide additional collateral based on the fair value of the underlying securities. Securities pledged as collateral under repurchase agreements are maintained with the Company’s safekeeping agents. The table below presents the remaining contractual maturities of repurchase agreements outstanding at March 31, 2021 and December 31, 2020, in addition to the various types of marketable securities that have been pledged as collateral for these borrowings (in thousands): As of March 31, 2021 Remaining Contractual Maturities of the Agreements Overnight 30-90 Days Over 90 Days Total Repurchase agreements, secured by: U.S. Treasury $ 18,702 $ — $ — $ 18,702 U.S. Agencies 2,039,634 481,430 2,751 2,523,815 Total repurchase agreements $ 2,058,336 $ 481,430 $ 2,751 $ 2,542,517 As of December 31, 2020 Remaining Contractual Maturities of the Agreements 2-29 Days 30-90 Days Over 90 Days Total Repurchase agreements, secured by: U.S. Treasury $ 2,440 $ — $ — $ 2,440 U.S. Agencies 1,757,119 489,302 1,000 2,247,421 Total repurchase agreements $ 1,759,559 $ 489,302 $ 1,000 $ 2,249,861

Business Segment Reporting

Business Segment Reporting	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Business Segment Reporting	8. Business Segment Reporting The Company has strategically aligned its operations into the following three reportable segments: Commercial Banking, Institutional Banking, and Personal Banking (collectively, the Business Segments, and each, a Business Segment). The Company’s senior executive officers regularly evaluate the Business Segment financial results produced by the Company’s internal reporting system in deciding how to allocate resources and assess performance for individual Business Segments. For comparability purposes, amounts in all periods are based on methodologies in effect at March 31, 2021. Previously reported results have been reclassified in this Form 10-Q to conform to the Company’s current organizational structure. The following summaries provide information about the activities of each Business Segment: Commercial Banking serves the commercial banking and treasury management needs of the Company’s small to middle-market businesses through a variety of products and services. Such services include commercial loans, commercial real estate financing, commercial credit cards, letters of credit, loan syndication services, and consultative services. In addition, the Company’s specialty lending group offers a variety of business solutions including asset-based lending, accounts receivable financing, mezzanine debt and minority equity investments. Treasury management services include depository services, account reconciliation and cash management tools such as, accounts payable and receivable solutions, electronic funds transfer and automated payments, controlled disbursements, lockbox services and remote deposit capture services. Institutional Banking is a combination of banking services, fund services, asset management services and healthcare services provided to institutional clients. This segment also provides fixed income sales, trading and underwriting, corporate trust and escrow services, as well as institutional custody. Institutional Banking includes UMB Fund Services, which provides fund administration and accounting, investor services and transfer agency, marketing and distribution, custody, and alternative investment services. Healthcare services provides healthcare payment solutions including custodial services for health savings accounts (HSAs) and private label, multipurpose debit cards to insurance carriers, third-party administrators, software companies, employers, and financial institutions. Personal Banking combines consumer banking and wealth management services offered to clients and delivered through personal relationships and the Company’s bank branches, ATM network and internet banking. Products offered include deposit accounts, retail credit cards, installment loans, home equity lines of credit, residential mortgages , and small business loans. The range of client services extends from a basic checking account to estate planning and trust services and includes private banking, brokerage services, and insurance services in addition to a full spectrum of investment advisory, trust, and custody services . Business Segment Information Business Segment financial results for the three months ended March 31, 2021 and March 31, 2020 were as follows (in thousands): Three Months Ended March 31, 2021 Commercial Banking Institutional Banking Personal Banking Total Net interest income $ 133,032 $ 22,138 $ 38,945 $ 194,115 Provision for credit losses (8,182 ) 220 462 (7,500 ) Noninterest income 7,385 68,421 33,091 108,897 Noninterest expense 65,645 71,282 64,019 200,946 Income before taxes 82,954 19,057 7,555 109,566 Income tax expense 12,813 2,943 1,167 16,923 Net income $ 70,141 $ 16,114 $ 6,388 $ 92,643 Average assets $ 14,204,000 $ 11,603,000 $ 7,245,000 $ 33,052,000 Three Months Ended March 31, 2020 Commercial Banking Institutional Banking Personal Banking Total Net interest income $ 106,948 $ 33,036 $ 33,957 $ 173,941 Provision for credit losses 82,220 275 5,505 88,000 Noninterest income 11,240 61,952 25,232 98,424 Noninterest expense 59,043 68,453 61,123 188,619 (Loss) income before taxes (23,075 ) 26,260 (7,439 ) (4,254 ) Income tax (benefit) expense (4,421 ) 5,032 (1,426 ) (815 ) Net (loss) income $ (18,654 ) $ 21,228 $ (6,013 ) $ (3,439 ) Average assets $ 11,601,000 $ 9,011,000 $ 5,428,000 $ 26,040,000

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenue Recognition	9. Revenue Recognition The following is a description of the principal activities from which the Company generates revenue that are within the scope of ASC Topic 606, Revenue from Contracts with Customers Trust and securities processing – Trust and securities processing income consists of fees earned on personal and corporate trust accounts, custody of securities services, trust investments and wealth management services, and mutual fund and alternative asset servicing. The performance obligations related to this revenue include items such as performing full bond trustee service administration, investment advisory services, custody and record-keeping services, and fund administrative and accounting services. These fees are part of long-term contractual agreements and the performance obligations are satisfied upon completion of service and fees are generally a fixed flat monthly rate or based on a percentage of the account’s market value per the contract with the customer. These fees are primarily recorded within the Company’s Institutional and Personal Banking segments. Trading and investment banking – Trading and investment banking income consists of income earned related to the Company’s trading securities portfolio, including futures hedging, dividends, bond underwriting, and other securities incomes. Th e vast majority of this revenue is recognized in accordance with ASC 320, Debt and Equity Securities , and is out of the scope of AS C 606. A portion of trading and investment banking represents fees earned for management fees, commissions, and underwriting of corporate bond issuances. The performance obligations related to these fees include reviewing the credit worthiness of the customer, ensuring appropriate regulatory approval and participating in due diligence. The fees are fixed per the bond prospectus and the performance obligations are satisfied upon registration approval of the bonds by the applicable regulatory agencies. Revenue is recognized at the point in time upon completion of service and when approval is granted by the regulators. Service charges on deposits – Service charges on deposit accounts represent monthly analysis fees recognized for the services related to customer deposit accounts, including account maintenance and depository transactions processing fees. Commercial Banking and Institutional Banking depository accounts charge fees in accordance with the customer’s pricing schedule while Personal Banking account holders are generally charged a flat service fee per month. Deposit service charges for the healthcare accounts included in the Institutional Banking segment are priced according to either standard pricing schedules with individual account holders or according to service agreements between the Company and employer groups or third party administrators. The Company satisfies the performance obligation related to providing depository accounts monthly as transactions are processed and deposit service charge revenue is recorded monthly. These fees are recognized within all Business Segments. Insurance fees and commissions – Insurance fees and commissions includes all insurance-related fees earned, including commissions for individual life, variable life, group life, health, group health, fixed annuity, and variable annuity insurance contracts. The performance obligations related to these revenues primarily represent the placement of insurance policies with the insurance company partners. The fees are based on the contracts with insurance company partners and the performance obligations are satisfied when the terms of the policy have been agreed to and the insurance policy becomes effective. Brokerage fees – Brokerage fees represent income earned related to providing brokerage transaction services, including commissions on equity and commodity trades, and fees for investment management, advisory and administration. The performance obligations related to transaction services are executing the specified trade and are priced according to the customer’s fee schedule. Such income is recognized at a point in time as the trade occurs and the performance obligation is fulfilled. The performance obligations related to investment management, advisory and administration include allocating customer assets across a wide range of mutual funds and other investments, on-going account monitoring and re-balancing of the portfolio. These performance obligations are satisfied over time and the related revenue is calculated monthly based on the assets under management of each customer. All material performance obligations are satisfied as of the end of each accounting period. Bankcard fees – Bankcard fees primarily represent income earned from interchange revenue from MasterCard and Visa for the Company’s processing of debit, credit, HSA, and flexible spending account transactions. Additionally, the Company earns income and incentives related to various referrals of customers to card programs. The performance obligation for interchange revenue is the processing of each transaction through the Company’s access to the banking system. This performance obligation is completed for each individual transaction and income is recognized per transaction in accordance with interchange rates established by MasterCard and Visa. The performance obligations for various referral and incentive programs include either referring customers to certain card products or issuing exclusively branded cards for certain customer segments. The pricing of these incentive and referral programs are in accordance with the agreement with the individual card partner. These performance obligations are completed as the referrals are made or over a period of time when the Company is exclusively issuing branded cards. For the three months ended March 31, 2021 and March 31, 2020, the Company had $7.8 million and $8.4 million of expense, respectively, recorded within the Bankcard fees line on the Company’s Consolidated Income Statements related to rebates and rewards programs that are outside of the scope of ASC 606. All material performance obligations are satisfied as of the end of each accounting period. Investment securities gains, net – In the regular course of business, the Company recognizes gains on the sale of available-for-sale securities. Additionally, the Company recognizes gains and losses on equity securities with readily determinable fair values and equity securities without readily determinable fair values. These gains and losses are recognized in accordance with ASC 321, , and are outside of the scope of ASC 606. Other income – The Company recognizes other miscellaneous income through a variety of other revenue streams, the most material of which include letter of credit fees, certain loan origination fees, gains on the sale of assets, derivative income, and bank-owned and company-owned life insurance income. These revenue streams are outside of the scope of ASC 606 and are recognized in accordance with the applicable U.S. GAAP. The remainder of Other income is primarily earned through transactions with personal banking customers, including wire transfer service charges, stop payment charges, and fees for items like money orders and cashier’s checks. The performance obligations of these types of fees are satisfied as transactions are completed and revenue is recognized upon transaction execution according to established fee schedules with the customers. The Company had no material contract assets, contract liabilities, or remaining performance obligations as of March 31, 2021. Total receivables from revenue recognized under the scope of ASC 606 were $69.7 million and $62.1 million as of March 31, 2021 and December 31, 2020, respectively. These receivables are included as part of the Other assets line on the Company’s Consolidated Balance Sheets. The following table depicts the disaggregation of noninterest income according to revenue stream and Business Segment for the three months ended March 31, 2021 and March 31, 2020. As stated in Note 8, “Business Segment Reporting,” for comparability purposes, amounts in all periods are based on methodologies in effect at March 31, 2021 and previously reported results have been reclassified in this Form 10-Q to conform to the Company’s current organizational structure. Disaggregated revenue is as follows (in thousands): Three Months Ended March 31, 2021 NONINTEREST INCOME Commercial Banking Institutional Banking Personal Banking Revenue (Expense) out of Scope of ASC 606 Total Trust and securities processing $ — $ 37,485 $ 17,349 $ — $ 54,834 Trading and investment banking — 301 — 9,055 9,356 Service charges on deposit accounts 7,528 12,577 1,801 70 21,976 Insurance fees and commissions — — 420 — 420 Brokerage fees 64 1,319 1,951 — 3,334 Bankcard fees 12,369 4,813 5,107 (7,616 ) 14,673 Investment securities losses, net — — — (8,336 ) (8,336 ) Other 231 404 669 11,336 12,640 Total Noninterest income $ 20,192 $ 56,899 $ 27,297 $ 4,509 $ 108,897 Three Months Ended March 31, 2020 NONINTEREST INCOME Commercial Banking Institutional Banking Personal Banking Revenue (Expense) out of Scope of ASC 606 Total Trust and securities processing $ — $ 31,262 $ 15,738 $ — $ 47,000 Trading and investment banking — 656 — 1,067 1,723 Service charges on deposit accounts 6,892 15,607 2,539 43 25,081 Insurance fees and commissions — — 259 — 259 Brokerage fees 59 7,590 2,211 — 9,860 Bankcard fees 14,988 4,724 4,990 (8,157 ) 16,545 Investment securities gains, net — — — 3,520 3,520 Other 400 438 713 (7,115 ) (5,564 ) Total Noninterest income $ 22,339 $ 60,277 $ 26,450 $ (10,642 ) $ 98,424

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	3 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	10. Commitments, Contingencies and Guarantees In the normal course of business, the Company is party to financial instruments with off-balance-sheet risk in order to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit, commercial letters of credit, standby letters of credit, forward foreign exchange contracts and spot foreign exchange contracts. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the Consolidated Balance Sheets. The contractual or notional amount of those instruments reflects the extent of involvement the Company has in particular classes of financial instruments. Many of the commitments expire without being drawn upon; therefore, the total amount of these commitments does not necessarily represent the future cash requirements of the Company. The Company’s exposure to credit loss in the event of nonperformance by the counterparty to the financial instruments for commitments to extend credit, commercial letters of credit, and standby letters of credit is represented by the contract or notional amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The following table summarizes the Company’s off-balance sheet financial instruments (in thousands): Contract or Notional Amount March 31, December 31, 2021 2020 Commitments to extend credit for loans (excluding credit card loans) $ 9,353,712 $ 8,851,333 Commitments to extend credit under credit card loans 3,537,324 3,472,339 Commercial letters of credit 4,852 3,160 Standby letters of credit 331,051 346,617 Forward contracts 53,065 51,273 Spot foreign exchange contracts 3,923 680 Allowance for Credit Losses on Off-Balance Sheet Credit Exposures The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancelable by the Company. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. The estimate is based on expected utilization rates by portfolio segment. Utilization rates are influenced by historical trends and current conditions. The expected utilization rates are applied to the total commitment to determine the expected amount to be funded. The allowance for off-balance sheet credit exposure is calculated by applying portfolio segment expected credit loss rates to the expected amount to be funded. The following categories of off-balance sheet credit exposures have been identified: Revolving Lines of Credit: includes commercial, construction, agriculture, personal, and home-equity. Risks inherent to revolving lines of credit often are related to the susceptibility of an individual or business experiencing unpredictable cash flow or financial troubles, thus leading to payment default. During these financial troubles, the borrower could have less than desirable assets collateralizing the revolving line of credit. The financial strain the borrower is experiencing could lead to drawing against the line without the ability to pay the line down. Non-Revolving Lines of Credit: includes commercial and personal. Lines that do not carry a revolving feature are generally associated with a specific expenditure or project, such as to purchase equipment or the construction of real estate. The predominate risk associated with non-revolving lines is the diversion of funds for other expenditures. If funds get diverted, the contributory value to collateral suffers. Letters of Credit: includes standby letters of credit. Generally, a standby letter of credit is established to provide assurance to the beneficiary that the applicant will perform certain obligations arising out of a separate transaction between the beneficiary and applicant. These obligations might be the performance of a service or delivery of a product. If the obligations are not met, it gives the beneficiary, the right to draw on the letter of credit. The ACL for off-balance sheet credit exposures was $5.6 million at both March 31, 2021 and December 31, 2020 and was recorded in the Accrued expenses and taxes line of the Company’s Consolidated Balance Sheets. No provision for off-balance sheet credit exposures was recorded for the three months ended March 31, 2021 or 2020.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	11. Derivatives and Hedging Activities Risk Management Objective of Using Derivatives The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loans and borrowings. The Company also has interest rate derivatives that result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk of the Company’s assets or liabilities. The Company has entered into an offsetting position for each of these derivative instruments with a matching instrument from another financial institution in order to minimize its net risk exposure resulting from such transactions. Fair Values of Derivative Instruments on the Consolidated Balance Sheets The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2021 and December 31, 2020. The Company’s derivative assets and derivative liabilities are located within Other assets and Other liabilities, respectively, on the Company’s Consolidated Balance Sheets. Derivative fair values are determined using valuation techniques including discounted cash flow analysis on the expected cash flows from each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. This table provides a summary of the fair value of the Company’s derivative assets and liabilities as of March 31, 2021 and December 31, 2020 ( in thousands Derivative Assets Derivative Liabilities March 31, December 31, March 31, December 31, Fair Value 2021 2020 2021 2020 Interest Rate Products: Derivatives not designated as hedging instruments $ 65,538 $ 103,506 $ 16,911 $ 9,375 Derivatives designated as hedging instruments 1 48 468 — Total $ 65,539 $ 103,554 $ 17,379 $ 9,375 Fair Value Hedges of Interest Rate Risk The Company is exposed to changes in the fair value of certain of its fixed-rate assets and liabilities due to changes in the benchmark interest rate, London Interbank Offered Rate (LIBOR). Interest rate swaps designated as fair value hedges involve making fixed rate payments to a counterparty in exchange for the Company receiving variable rate payments over the life of the agreements without the exchange of the underlying notional amount. As of March 31, 2021, the Company had five interest rate swaps that were designated as fair value hedges of interest rate risk associated with the Company’s fixed rate loan assets and municipal bond securities. These swaps had an aggregate notional amount of $508.2 million as of March 31, 2021. As of December 31, 2020, the Company had one interest rate swap that was designated as a fair value hedge of interest rate risk associated with the Company’s fixed rate loan assets. This swap had a notional amount of $5.0 million as of December 31, 2020. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in Interest income in the Consolidated Statements of Income. Cash Flow Hedges of Interest Rate Risk The Company’s objective in using interest rate derivatives is to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps and floors as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. As of March 31, 2021 and December 31, 2020, the Company had two interest rate swaps that were designated as cash flow hedges of interest rate risk associated with the Company’s variable-rate subordinated debentures issued by Marquette Capital Trusts III and IV. These swaps had an aggregate notional amount of $51.5 million at both March 31, 2021 and December 31, 2020. Interest rate floors designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty if interest rates fall below the strike rate on the contract in exchange for an upfront premium. On August 28, 2020, the Company terminated an interest rate floor with a notional amount of $750.0 million. At the date of termination, the interest rate floor had a net asset fair value of $34.1 million. The gross unrealized gain on the terminated interest rate floor remaining in AOCI was $15.9 million, or $12.0 million net of tax, and $17.0 million, or $12.9 million net of tax, as of March 31, 2021 and December 31, 2020, respectively. The unrealized gain will be reclassified into Interest income as the underlying forecasted transactions impact earnings through the original maturity of the hedged forecasted transactions. The total remaining term over which the unrealized gain will be reclassified into earnings is 3.4 years. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in AOCI and is subsequently reclassified into interest expense and interest income in the period during which the hedged forecasted transaction affects earnings. Amounts reported in AOCI related to interest rate swap derivatives will be reclassified to Interest expense as interest payments are received or paid on the Company’s derivatives. Amounts reported in AOCI related to interest rate floor derivatives will be reclassified to Interest income as the underlying forecasted transactions impact earnings through the original maturity of the hedged forecasted transactions. The Company expects to reclassify $1.3 million from AOCI to Interest expense and $4.7 million from AOCI to Interest income during the next 12 months. As of March 31, 2021, the Company is hedging its exposure to the variability in future cash flows for forecasted transactions over a maximum period of 15.5 years. Non-designated Hedges The remainder of the Company’s derivatives are not designated in qualifying hedging relationships. Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers. The Company executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously offset by interest rate swaps that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. The changes in the fair value of both the customer swaps and the offsetting swaps are recognized in Other non interest expense in the Consolidated Statements of Income. As of March 31, 2021 , the Company had interest rate swaps with an aggregate notional amount of $ billion related to this program. As of December 31, 20 20 , the Company had interest rate swaps with an aggregate notional amount of $ 2.5 billion. Effect of Derivative Instruments on the Consolidated Statements of Income and Accumulated Other Comprehensive Income This table provides a summary of the amount of gain or loss recognized in Interest income and Other noninterest expense in the Consolidated Statements of Income related to the Company’s derivative assets and liabilities for the three months ended March 31, 2021 and March 31, 2020 (in thousands) Amount of Gain (Loss) Recognized For the Three Months Ended March 31, March 31, 2021 2020 Interest Rate Products Derivatives not designated as hedging instruments $ 489 $ (259 ) Total $ 489 $ (259 ) Interest Rate Products Derivatives designated as hedging instruments: Fair value adjustments on derivatives $ 9,328 $ (203 ) Fair value adjustments on hedged items (9,251 ) 202 Total $ 77 $ (1 ) These tables provide a summary of the effect of hedges on AOCI in the Consolidated Statements of Comprehensive Income related to the Company’s derivative assets and liabilities for the three months ended March 31, 2021 and March 31, 2020 (in thousands) For the Three Months Ended March 31, 2021 Derivatives in Cash Flow Hedging Relationships Gain Recognized in OCI on Derivative Gain Recognized in OCI Included Component Gain Recognized in OCI Excluded Component Gain (Loss) Reclassified from AOCI into Earnings Gain (Loss) Reclassified from AOCI into Earnings Included Component Loss Reclassified from AOCI into Earnings Excluded Component Interest rate floor $ — $ — $ — $ 1,166 $ 1,721 $ (555 ) Interest rate swaps 6,503 6,503 — (324 ) (324 ) — Total $ 6,503 $ 6,503 $ — $ 842 $ 1,397 $ (555 ) For the Three Months Ended March 31, 2020 Derivatives in Cash Flow Hedging Relationships Gain (Loss) Recognized in OCI on Derivative Gain (Loss) Recognized in OCI Included Component Loss Recognized in OCI Excluded Component Loss Reclassified from AOCI into Earnings Loss Reclassified from AOCI into Earnings Included Component Loss Reclassified from AOCI into Earnings Excluded Component Interest rate floor $ 24,934 $ 29,296 $ (4,362 ) $ (636 ) $ — $ (636 ) Interest rate swaps (10,409 ) (10,409 ) — (132 ) (132 ) — Total $ 14,525 $ 18,887 $ (4,362 ) $ (768 ) $ (132 ) $ (636 ) Credit-risk-related Contingent Features The Company has agreements with certain of its derivative counterparties that contain a provision that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. As of March 31, 2021, the termination value of derivatives in a net liability position, which includes accrued interest, related to these agreements was $5.9 million. The Company has minimum collateral posting thresholds with certain of its derivative counterparties. At March 31, 2021, the Company had posted $10.6 million of collateral. If the Company had breached any of these provisions at March 31, 2021, it could have been required to settle its obligations under the agreements at the termination value.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	12. Fair Value Measurements The following table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis as of March 31, 2021, and December 31, 2020, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value. Fair values determined by Level 1 inputs utilize quoted prices in active markets for identical assets and liabilities that the Company has the ability to access. Fair values determined by Level 2 inputs utilize inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability, such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the hierarchy. In such cases, the fair value is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Assets and liabilities measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2020 (in thousands): Fair Value Measurement at March 31, 2021 Description March 31, 2021 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets U.S. Treasury $ 3,896 $ 3,896 $ — $ — U.S. Agencies 3,933 — 3,933 — State and political subdivisions 17,296 — 17,296 — Corporates 3,133 3,133 — — Trading – other 841 841 — — Trading securities 29,099 7,870 21,229 — U.S. Treasury 49,479 49,479 — — U.S. Agencies 94,905 — 94,905 — Mortgage-backed 5,989,606 — 5,989,606 — State and political subdivisions 3,522,941 — 3,522,941 — Corporates 96,461 96,461 — — Available for sale securities 9,753,392 145,940 9,607,452 — Equity securities with readily determinable fair values 133,979 133,979 — — Company-owned life insurance 64,607 — 64,607 — Bank-owned life insurance 389,806 — 389,806 — Derivatives 65,539 — 65,539 — Total $ 10,436,422 $ 287,789 $ 10,148,633 $ — Liabilities Derivatives $ 17,379 $ — $ 17,379 $ — Securities sold not yet purchased 2,001 — 2,001 — Total $ 19,380 $ — $ 19,380 $ — Fair Value Measurement at December 31, 2020 Description December 31, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets U.S. Treasury $ 651 $ 651 $ — $ — U.S. Agencies 1,568 — 1,568 — Mortgage-backed 4 — 4 — State and political subdivisions 18,545 — 18,545 — Corporates 711 711 — — Trading – other 13,541 13,541 — — Trading securities 35,020 14,903 20,117 — U.S. Treasury 30,740 30,740 — — U.S. Agencies 95,949 — 95,949 — Mortgage-backed 5,468,181 — 5,468,181 — State and political subdivisions 3,623,619 — 3,623,619 — Corporates 81,199 81,199 — — Available for sale securities 9,299,688 111,939 9,187,749 — Equity securities with readily determinable fair values 134,197 134,197 — — Company-owned life insurance 63,575 — 63,575 — Bank-owned life insurance 387,513 — 387,513 — Derivatives 103,554 — 103,554 — Total $ 10,023,547 $ 261,039 $ 9,762,508 $ — Liabilities Derivatives $ 9,375 $ — $ 9,375 $ — Securities sold not yet purchased 2,177 — 2,177 — Total $ 11,552 $ — $ 11,552 $ — Valuation methods for instruments measured at fair value on a recurring basis The following methods and assumptions were used to estimate the fair value of each class of financial instruments measured on a recurring basis: Trading Securities Fair values for trading securities (including financial futures), are based on quoted market prices where available. If quoted market prices are not available, fair values are based on quoted market prices for similar securities. Available for Sale Securities Fair values are based on quoted market prices or dealer quotes, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities. Prices are provided by third-party pricing services and are based on observable market inputs. On an annual basis, the Company compares a sample of these prices to other independent sources for the same securities. Additionally, throughout the year, if securities are sold, comparisons are made between the pricing services prices and the market prices at which the securities were sold. Variances are analyzed, and, if appropriate, additional research is conducted with the third-party pricing services. Based on this research, the pricing services may affirm or revise their quoted price. No significant adjustments have been made to the prices provided by the pricing services. The pricing services also provide documentation on an ongoing basis that includes reference data, inputs and methodology by asset class, which is reviewed to ensure that security placement within the fair value hierarchy is appropriate. Equity securities with readily determinable fair values Fair values are based on quoted market prices. Company-owned Life Insurance Fair value is equal to the cash surrender value of the life insurance policies. Bank-owned Life Insurance Fair value is equal to the cash surrender value of the life insurance policies. Derivatives Fair values are determined using valuation techniques including discounted cash flow analysis on the expected cash flows from each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Securities sold not yet purchased Fair values are based on quoted market prices or dealer quotes, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities. Prices are provided by third-party pricing services and are based on observable market inputs. Assets measured at fair value on a non-recurring basis as of March 31, 2021 and December 31, 2020 (in thousands): Fair Value Measurement at March 31, 2021 Using Description March 31, 2021 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses Recognized During the Three Months Ended March 31 Collateral dependent assets $ 32,476 $ — $ — $ 32,476 $ (3 ) Other real estate owned — — — — — Total $ 32,476 $ — $ — $ 32,476 $ (3 ) Fair Value Measurement at December 31, 2020 Using Description December 31, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses Recognized During the Twelve Months Ended December 31 Collateral dependent assets $ 35,995 $ — $ — $ 35,995 $ (9,389 ) Other real estate owned 2,798 — — 2,798 (938 ) Total $ 38,793 $ — $ — $ 38,793 $ (10,327 ) Valuation methods for instruments measured at fair value on a non-recurring basis The following methods and assumptions were used to estimate the fair value of each class of financial instruments measured on a non-recurring basis: Collateral Dependent Assets Collateral dependent assets are assets evaluated as part of the ACL on an individual basis. Those assets for which there is an associated allowance are considered financial assets measured at fair value on a non-recurring basis. Adjustments are recorded on certain assets to reflect write-downs that are based on the external appraised value of the underlying collateral. The external appraisals are generally based on recent sales of comparable properties which are then adjusted for the unique characteristics of the property being valued. In the case of non-real estate collateral, reliance is placed on a variety of sources, including external estimates of value and judgments based on the experience and expertise of internal specialists within the Company’s property management group and the Company’s credit department. The valuation s of the collateral dependent assets are reviewed on a quarterly basis. Because many of these inputs are not observable, the measurements are classified as Level 3. Other real estate owned Other real estate owned consists of loan collateral which has been repossessed through foreclosure. This collateral is comprised of commercial and residential real estate and other non-real estate property, including auto, recreational and marine vehicles. Other real estate owned is recorded as held for sale initially at the fair value of the collateral less estimated selling costs. The initial valuation of the foreclosed property is obtained through an appraisal process similar to the process described in the impaired loans paragraph above. Subsequent to foreclosure, valuations are reviewed quarterly and updated periodically, and the assets may be marked down further, reflecting a new cost basis. Fair value measurements may be based upon appraisals, third-party price opinions, or internally developed pricing methods and those measurements are classified as Level 3. Fair value disclosures require disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The estimated fair value of the Company’s financial instruments at March 31, 2021 and December 31, 2020 are as follows (in thousands): Fair Value Measurement at March 31, 2021 Using Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Estimated Fair Value FINANCIAL ASSETS Cash and short-term investments $ 5,877,806 $ 4,247,993 $ 1,629,813 $ — $ 5,877,806 Securities available for sale 9,753,392 145,940 9,607,452 — 9,753,392 Securities held to maturity (exclusive of allowance for credit losses) 1,042,670 — 1,012,129 — 1,012,129 Trading securities 29,099 7,870 21,229 — 29,099 Other securities 298,209 133,979 164,320 — 298,299 Loans (exclusive of allowance for credit losses) 16,507,660 — 16,820,506 — 16,820,506 Derivatives 65,539 — 65,539 — 65,539 FINANCIAL LIABILITIES Demand and savings deposits 27,616,227 27,616,227 — — 27,616,227 Time deposits 664,565 — 664,565 — 664,565 Other borrowings 2,759,818 217,301 2,542,517 — 2,759,818 Long-term debt 270,074 — 293,386 — 293,386 Derivatives 17,379 — 17,379 — 17,379 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 1,583 Commercial letters of credit 76 Standby letters of credit 777 Fair Value Measurement at December 31, 2020 Using Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Estimated Fair Value FINANCIAL ASSETS Cash and short-term investments $ 5,191,015 $ 3,540,680 $ 1,650,335 $ — $ 5,191,015 Securities available for sale 9,299,688 111,939 9,187,749 — 9,299,688 Securities held to maturity (exclusive of allowance for credit losses) 1,014,614 — 1,029,444 — 1,029,444 Trading securities 35,020 14,903 20,117 — 35,020 Other securities 296,053 134,197 161,856 — 296,053 Loans (exclusive of allowance for credit losses) 16,110,359 — 16,413,132 — 16,413,132 Derivatives 103,554 — 103,554 — 103,554 FINANCIAL LIABILITIES Demand and savings deposits 26,175,156 26,175,156 — — 26,175,156 Time deposits 876,095 — 879,841 — 879,841 Other borrowings 2,315,497 65,636 2,249,861 — 2,315,497 Long-term debt 269,595 — 299,858 — 299,858 Derivatives 9,375 — 9,375 — 9,375 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 6,405 Commercial letters of credit 150 Standby letters of credit 3,365 Cash and short-term investments The carrying amounts of cash and due from banks, federal funds sold and resell agreements are reasonable estimates of their fair values. Securities held to maturity Fair value of held-to-maturity securities are estimated by discounting the future cash flows using current market rates. Other securities Amount consists of FRB and FHLB stock held by the Company, equity securities with readily determinable fair values, and equity securities without readily determinable fair values, including equity-method investments and other miscellaneous investments. The carrying amount of the FRB and FHLB stock equals its fair value because the shares can only be redeemed by the FRB and FHLB at their carrying amount. Equity securities with readily determinable fair values are measured at fair value using quoted market prices. Equity securities without readily determinable fair values are carried at cost, which approximates fair value. As of December 31, 2020, equity securities without readily determinable fair values also included PCM equity-method investments, for which the Company’s proportionate share of the income or loss was recognized on a one-quarter lag based on the valuation of the underlying investment(s). Loans Fair values are estimated for portfolios with similar financial characteristics. Loans are segregated by type, such as commercial, real estate, consumer, and credit card. Each loan category is further segmented into fixed and variable interest rate categories. The fair value of loans are estimated by discounting the future cash flows. The discount rates used are estimated using comparable market rates for similar types of instruments adjusted to be commensurate with the credit risk, overhead costs, and optionality of such instruments. Demand and savings deposits The fair value of demand deposits and savings accounts is the amount payable on demand at March 31, 2021 and December 31, 2020. Time deposits The fair value of fixed-maturity certificates of deposit is estimated by discounting the future cash flows using the rates that are currently offered for deposits of similar remaining maturities. Other borrowings The carrying amounts of federal funds purchased, repurchase agreements and other short-term debt are reasonable estimates of their fair value because of the short-term nature of their maturities. Federal funds purchased are classified as Level 1 based on availability of quoted market prices and repurchase agreements and other short-term debt are classified as Level 2. Long-term debt Rates currently available to the Company for debt with similar terms and remaining maturities are used to estimate fair value of existing debt. Other off-balance sheet instruments The fair value of loan commitments and letters of credit are determined based on the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreement and the present creditworthiness of the counterparties. Neither the fees earned during the year on these instruments nor their fair value at period-end are significant to the Company’s consolidated financial position.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Nature Of Operations	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. These estimates and assumptions also impact reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. A summary of the significant accounting policies to assist the reader in understanding the financial presentation is provided in the Notes to Consolidated Financial Statements in the Form 10-K.
Cash and cash equivalents	Cash and cash equivalents Cash and cash equivalents includes Cash and due from banks and amounts due from the Federal Reserve Bank (FRB). Cash on hand, cash items in the process of collection, and amounts due from correspondent banks are included in Cash and due from banks. Amounts due from the FRB are interest-bearing for all periods presented and are included in the Interest-bearing due from banks line on the Company’s Consolidated Balance Sheets. This table provides a summary of cash and cash equivalents as presented on the Consolidated Statements of Cash Flows as of March 31, 2021 and March 31, 2020 (in thousands) March 31, 2021 2020 Due from the FRB $ 3,806,302 $ 1,078,701 Cash and due from banks 387,230 340,553 Cash and cash equivalents at end of period $ 4,193,532 $ 1,419,254 Also included in the Interest-bearing due from banks, but not considered cash and cash equivalents, are interest-bearing accounts held at other financial institutions, which totaled $54.5 million and $30.6 million at March 31, 2021 and March 31, 2020, respectively.
Per Share Data	Per Share Data Basic net income (loss) per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted quarter-to-date net income per share includes the dilutive effect of 424,109 shares issuable upon the exercise of stock options , nonvested restricted shares, and nonvested restricted stock units granted by the Company and outstanding at March 31, 2021 . Basic and diluted net loss per share were the same at March 31, 2020 as the impact of all potentially dilutive shares was anti-dilutive. Certain options, restricted stock and restricted stock units issued under employee benefits plans were excluded from the computation of diluted earnings per share because they were anti-dilutive. At March 31, 2021, there were no outstanding stock options, restricted stock and restricted stock units excluded from the computation of diluted income per share. At March 31, 2020, all outstanding options, restricted stock and restricted stock units were excluded.
Derivatives	Derivatives The Company records all derivatives on the Consolidated Balance Sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Currently, seven of the Company’s derivatives are designated in qualifying hedging relationships. However, the remainder of the Company’s derivatives are not designated in qualifying hedging relationships, as the derivatives are not used to manage risks within the Company’s assets or liabilities. All changes in fair value of the Company’s non-designated derivatives and fair value hedges are recognized directly in earnings. Changes in fair value of the Company’s cash flow hedges are recognized in accumulated other comprehensive income (AOCI) and are reclassified to earnings when the hedged transaction affects earnings.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Summary of Cash and Cash Equivalents	This table provides a summary of cash and cash equivalents as presented on the Consolidated Statements of Cash Flows as of March 31, 2021 and March 31, 2020 (in thousands) March 31, 2021 2020 Due from the FRB $ 3,806,302 $ 1,078,701 Cash and due from banks 387,230 340,553 Cash and cash equivalents at end of period $ 4,193,532 $ 1,419,254

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Summary of Loan Classes and Aging of Past Due Loans	This table provides a summary of loan classes and an aging of past due loans at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 30-89 Days Past Due and Accruing Greater than 90 Days Past Due and Accruing Nonaccrual Loans Total Past Due Current Total Loans Loans Commercial and industrial $ 3,156 $ 66 $ 30,181 $ 33,403 $ 7,136,002 $ 7,169,405 Specialty lending — — 19,083 19,083 501,693 520,776 Commercial real estate 12,335 183 21,297 33,815 6,116,539 6,150,354 Consumer real estate 1,610 111 5,372 7,093 1,992,647 1,999,740 Consumer 196 173 73 442 120,055 120,497 Credit cards 1,563 1,240 700 3,503 353,003 356,506 Leases and other — — — — 180,107 180,107 Total loans $ 18,860 $ 1,773 $ 76,706 $ 97,339 $ 16,400,046 $ 16,497,385 December 31, 2020 30-89 Days Past Due and Accruing Greater than 90 Days Past Due and Accruing Nonaccrual Loans Total Past Due Current Total Loans Loans Commercial and industrial $ 4,652 $ 319 $ 33,769 $ 38,740 $ 7,023,334 $ 7,062,074 Specialty lending — — 19,437 19,437 491,863 511,300 Commercial real estate 2,351 225 28,386 30,962 5,877,972 5,908,934 Consumer real estate 524 — 5,345 5,869 1,939,625 1,945,494 Consumer 281 120 88 489 117,497 117,986 Credit cards 2,061 1,288 798 4,147 362,821 366,968 Leases and other — — — — 190,895 190,895 Total loans $ 9,869 $ 1,952 $ 87,823 $ 99,644 $ 16,004,007 $ 16,103,651
Summary of Amortized Cost of Nonaccrual Loans with No Related Allowance	The following tables provide the amortized cost of nonaccrual loans with no related allowance for credit losses by loan class at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Nonaccrual Loans Amortized Cost of Nonaccrual Loans with no related Allowance Loans Commercial and industrial $ 30,181 $ 11,060 Specialty lending 19,083 1,674 Commercial real estate 21,297 15,221 Consumer real estate 5,372 5,372 Consumer 73 73 Credit cards 700 700 Total loans $ 76,706 $ 34,100 December 31, 2020 Nonaccrual Loans Amortized Cost of Nonaccrual Loans with no related Allowance Loans Commercial and industrial $ 33,769 $ 9,916 Specialty lending 19,437 242 Commercial real estate 28,386 25,733 Consumer real estate 5,345 5,345 Consumer 88 88 Credit cards 798 798 Total loans $ 87,823 $ 42,122
Summary of Amortized Cost Balance of Each of Loan Classes Disaggregated by Collateral Type and Origination Year	The following tables provide a summary of the amortized cost balance of each of the Company’s loan classes disaggregated by collateral type and origination year as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Loan Segment and Type Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Commercial and industrial: Equipment/Accounts Receivable/Inventory $ 1,054,638 $ 2,369,843 $ 637,469 $ 453,289 $ 173,635 $ 202,850 $ 2,115,942 $ 5,626 $ 7,013,292 Agriculture 2,962 8,070 4,753 1,571 2,422 1,881 122,856 — 144,515 Overdrafts — — — — — — 11,598 — 11,598 Total Commercial and industrial 1,057,600 2,377,913 642,222 454,860 176,057 204,731 2,250,396 5,626 7,169,405 Specialty lending: Asset-based lending 2,387 61,950 — — — — 303,994 — 368,331 Factoring — — — — — — 152,445 — 152,445 Total Specialty lending 2,387 61,950 — — — — 456,439 — 520,776 Commercial real estate: Owner-occupied 120,177 583,506 315,070 252,097 156,162 263,986 18,297 3,639 1,712,934 Non-owner-occupied 465,337 705,983 660,048 209,190 126,261 386,854 21,639 116,001 2,691,313 Farmland 30,449 284,001 35,557 29,720 29,150 48,835 36,470 — 494,182 5+ Multi-family 4,871 228,665 106,403 2,669 3,816 39,504 1,820 — 387,748 1-4 Family construction — — — — — — 39,046 — 39,046 General construction 9,157 20,063 3,004 1,144 398 365 791,000 — 825,131 Total Commercial real estate 629,991 1,822,218 1,120,082 494,820 315,787 739,544 908,272 119,640 6,150,354 Consumer real estate: HELOC 11,893 81,980 9,813 3,745 34 2,527 252,275 192 362,459 First lien: 1-4 family 171,257 873,810 282,568 75,864 79,744 133,202 356 — 1,616,801 Junior lien: 1-4 family 1,274 8,051 5,813 2,024 1,006 2,036 276 — 20,480 Total Consumer real estate 184,424 963,841 298,194 81,633 80,784 137,765 252,907 192 1,999,740 Consumer: Revolving line — — — — — — 66,690 — 66,690 Auto 3,155 11,496 8,742 2,431 1,296 663 — — 27,783 Other 1,826 4,309 2,686 1,883 187 1,044 14,089 — 26,024 Total Consumer 4,981 15,805 11,428 4,314 1,483 1,707 80,779 — 120,497 Credit cards: Consumer — — — — — — 172,816 — 172,816 Commercial — — — — — — 183,690 — 183,690 Total Credit cards — — — — — — 356,506 — 356,506 Leases and other: Leases — — 915 — 787 679 — — 2,381 Other 628 31,742 9,410 6,553 2,128 1,467 125,798 — 177,726 Total Leases and other 628 31,742 10,325 6,553 2,915 2,146 125,798 — 180,107 Total loans $ 1,880,011 $ 5,273,469 $ 2,082,251 $ 1,042,180 $ 577,026 $ 1,085,893 $ 4,431,097 $ 125,458 $ 16,497,385 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Loan Segment and Type Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Commercial and industrial: Equipment/Accounts Receivable/Inventory $ 3,185,589 $ 684,488 $ 471,950 $ 185,167 $ 178,576 $ 69,599 $ 2,108,799 $ — $ 6,884,168 Agriculture 8,886 6,495 1,976 3,651 2,164 416 137,955 38 161,581 Overdrafts — — — — — — 16,325 — 16,325 Total Commercial and industrial 3,194,475 690,983 473,926 188,818 180,740 70,015 2,263,079 38 7,062,074 Specialty lending: Asset-based lending 64,258 — — — — — 291,091 — 355,349 Factoring — — — — — — 155,951 — 155,951 Total Specialty lending 64,258 — — — — — 447,042 — 511,300 Commercial real estate: Owner-occupied 579,212 334,098 233,192 170,913 120,603 176,377 18,880 51,910 1,685,185 Non-owner-occupied 846,030 630,457 230,549 169,193 333,215 115,753 49,384 97,954 2,472,535 Farmland 297,788 37,288 31,454 37,485 28,925 29,480 40,043 — 502,463 5+ Multi-family 190,922 80,293 2,835 32,498 39,802 6,298 2,418 94,789 449,855 1-4 Family construction 144 — — — — — 30,131 — 30,275 General construction 20,452 3,082 1,215 514 358 2,738 733,952 6,310 768,621 Total Commercial real estate 1,934,548 1,085,218 499,245 410,603 522,903 330,646 874,808 250,963 5,908,934 Consumer real estate: HELOC 82,410 11,236 4,263 241 63 2,561 294,390 5 395,169 First lien: 1-4 family 896,676 304,017 83,429 87,927 78,458 75,408 2,579 — 1,528,494 Junior lien: 1-4 family 9,142 6,383 2,360 1,247 948 1,470 281 — 21,831 Total Consumer real estate 988,228 321,636 90,052 89,415 79,469 79,439 297,250 5 1,945,494 Consumer: Revolving line — — — — — — 65,215 — 65,215 Auto 12,470 9,846 2,960 1,645 680 348 — — 27,949 Other 5,017 3,200 2,131 216 1,005 172 13,081 — 24,822 Total Consumer 17,487 13,046 5,091 1,861 1,685 520 78,296 — 117,986 Credit cards: Consumer — — — — — — 188,681 — 188,681 Commercial — — — — — — 178,287 — 178,287 Total Credit cards — — — — — — 366,968 — 366,968 Leases and other: Leases — 915 — 787 — 711 — — 2,413 Other 33,626 10,758 7,659 2,611 1,323 646 131,859 — 188,482 Total Leases and other 33,626 11,673 7,659 3,398 1,323 1,357 131,859 — 190,895 Total loans $ 6,232,622 $ 2,122,556 $ 1,075,973 $ 694,095 $ 786,120 $ 481,977 $ 4,459,302 $ 251,006 $ 16,103,651
Summary of Amortized Cost Balance by Collateral Type and Risk Rating	The following tables provide a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Equipment/Accounts Receivable/Inventory Non-watch list – Pass $ 929,053 $ 2,249,057 $ 622,060 $ 429,748 $ 154,191 $ 188,618 $ 1,983,266 $ 5,626 $ 6,561,619 Watch – Pass 52,371 86,080 15,178 14,817 11,005 11,865 67,607 — 258,923 Special Mention 35,006 3,851 — 1,384 1,893 1,456 5,949 — 49,539 Substandard 38,208 30,769 231 3,866 1,346 911 59,120 — 134,451 Doubtful — 86 — 3,474 5,200 — — — 8,760 Total Equipment/Accounts Receivable/Inventory $ 1,054,638 $ 2,369,843 $ 637,469 $ 453,289 $ 173,635 $ 202,850 $ 2,115,942 $ 5,626 $ 7,013,292 Agriculture Non-watch list – Pass $ 2,907 $ 7,360 $ 3,688 $ 984 $ 686 $ 1,690 $ 81,256 $ — $ 98,571 Watch – Pass 55 124 578 188 102 142 14,278 — 15,467 Special Mention — 273 487 399 22 — 8,480 — 9,661 Substandard — 313 — — 1,612 49 18,842 — 20,816 Doubtful — — — — — — — — — Total Agriculture $ 2,962 $ 8,070 $ 4,753 $ 1,571 $ 2,422 $ 1,881 $ 122,856 $ — $ 144,515 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Equipment/Accounts Receivable/Inventory Non-watch list – Pass $ 2,975,305 $ 664,016 $ 439,460 $ 171,409 $ 165,321 $ 67,442 $ 1,948,261 $ — $ 6,431,214 Watch – Pass 89,746 10,400 9,309 5,126 11,044 1,592 70,768 — 197,985 Special Mention 53,334 9,788 15,524 1,898 2,158 — 8,485 — 91,187 Substandard 67,118 231 7,657 1,369 53 565 81,246 — 158,239 Doubtful 86 53 — 5,365 — — 39 — 5,543 Total Equipment/Accounts Receivable/Inventory $ 3,185,589 $ 684,488 $ 471,950 $ 185,167 $ 178,576 $ 69,599 $ 2,108,799 $ — $ 6,884,168 Agriculture Non-watch list – Pass $ 7,880 $ 3,924 $ 1,389 $ 1,379 $ 1,759 $ 404 $ 92,917 $ 38 $ 109,690 Watch – Pass 179 2,571 188 102 345 — 17,956 — 21,341 Special Mention 303 — 399 22 — 12 6,674 — 7,410 Substandard 524 — — 2,148 60 — 20,408 — 23,140 Doubtful — — — — — — — — — Total Agriculture $ 8,886 $ 6,495 $ 1,976 $ 3,651 $ 2,164 $ 416 $ 137,955 $ 38 $ 161,581 The following tables provide a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Owner-occupied Non-watch list – Pass $ 119,343 $ 574,043 $ 306,753 $ 245,581 $ 127,363 $ 247,605 $ 14,023 $ 3,639 $ 1,638,350 Watch – Pass — 2,335 8,217 5,729 1,181 10,254 568 — 28,284 Special Mention 106 1,394 — — — 2,564 — — 4,064 Substandard 728 5,734 100 787 27,618 3,563 3,706 — 42,236 Doubtful — — — — — — — — — Total Owner-occupied $ 120,177 $ 583,506 $ 315,070 $ 252,097 $ 156,162 $ 263,986 $ 18,297 $ 3,639 $ 1,712,934 Non-owner-occupied Non-watch list – Pass $ 431,837 $ 695,641 $ 547,676 $ 184,201 $ 120,831 $ 334,679 $ 21,639 $ 116,001 $ 2,452,505 Watch – Pass 33,500 1,326 60,675 24,989 5,430 9,530 — — 135,450 Special Mention — 9,016 25,187 — — 41,335 — — 75,538 Substandard — — 26,510 — — 1,310 — — 27,820 Doubtful — — — — — — — — — Total Non-owner-occupied $ 465,337 $ 705,983 $ 660,048 $ 209,190 $ 126,261 $ 386,854 $ 21,639 $ 116,001 $ 2,691,313 Farmland Non-watch list – Pass $ 10,019 $ 237,511 $ 26,282 $ 15,149 $ 22,288 $ 18,170 $ 17,976 $ — $ 347,395 Watch – Pass 6,413 20,732 8,720 13,404 4,523 23,843 15,887 — 93,522 Special Mention — — 303 630 2,339 4,890 476 — 8,638 Substandard 14,017 25,758 252 537 — 1,932 2,131 — 44,627 Doubtful — — — — — — — — — Total Farmland $ 30,449 $ 284,001 $ 35,557 $ 29,720 $ 29,150 $ 48,835 $ 36,470 $ — $ 494,182 5+ Multi-family Non-watch list – Pass $ 4,871 $ 228,665 $ 82,373 $ 2,669 $ 2,499 $ 39,504 $ 1,820 $ — $ 362,401 Watch – Pass — — 21,597 — — — — — 21,597 Special Mention — — — — — — — — — Substandard — — 2,433 — 1,317 — — — 3,750 Doubtful — — — — — — — — — Total 5+ Multi-family $ 4,871 $ 228,665 $ 106,403 $ 2,669 $ 3,816 $ 39,504 $ 1,820 $ — $ 387,748 1-4 Family construction Non-watch list – Pass $ — $ — $ — $ — $ — $ — $ 39,046 $ — $ 39,046 Watch – Pass — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total 1-4 Family construction $ — $ — $ — $ — $ — $ — $ 39,046 $ — $ 39,046 General construction Non-watch list – Pass $ 9,157 $ 20,063 $ 2,918 $ 1,144 $ 398 $ 365 $ 787,683 $ — $ 821,728 Watch – Pass — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — 3,317 — 3,317 Doubtful — — 86 — — — — — 86 Total General construction $ 9,157 $ 20,063 $ 3,004 $ 1,144 $ 398 $ 365 $ 791,000 $ — $ 825,131 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Owner-occupied Non-watch list – Pass $ 568,636 $ 327,579 $ 227,581 $ 141,758 $ 118,593 $ 163,292 $ 15,052 $ 51,910 $ 1,614,401 Watch – Pass 1,712 6,413 4,761 1,194 — 8,581 — — 22,661 Special Mention 1,424 — — — 1,588 — — — 3,012 Substandard 7,440 106 850 27,961 422 4,504 3,828 — 45,111 Doubtful — — — — — — — — — Total Owner-occupied $ 579,212 $ 334,098 $ 233,192 $ 170,913 $ 120,603 $ 176,377 $ 18,880 $ 51,910 $ 1,685,185 Non-owner-occupied Non-watch list – Pass $ 802,078 $ 525,246 $ 205,484 $ 156,290 $ 294,979 $ 101,616 $ 49,384 $ 81,499 $ 2,216,576 Watch – Pass 43,769 45,748 25,065 12,903 1,936 7,701 — 16,455 153,577 Special Mention 183 32,953 — — 36,300 5,100 — — 74,536 Substandard — 26,510 — — — 1,336 — — 27,846 Doubtful — — — — — — — — — Total Non-owner-occupied $ 846,030 $ 630,457 $ 230,549 $ 169,193 $ 333,215 $ 115,753 $ 49,384 $ 97,954 $ 2,472,535 Farmland Non-watch list – Pass $ 237,124 $ 27,815 $ 15,907 $ 26,071 $ 13,376 $ 8,924 $ 19,074 $ — $ 348,291 Watch – Pass 20,992 9,221 13,404 5,133 6,301 19,835 17,699 — 92,585 Special Mention — — 630 1,854 4,901 40 861 — 8,286 Substandard 39,672 252 1,513 4,427 4,347 681 2,409 — 53,301 Doubtful — — — — — — — — — Total Farmland $ 297,788 $ 37,288 $ 31,454 $ 37,485 $ 28,925 $ 29,480 $ 40,043 $ — $ 502,463 5+ Multi-family Non-watch list – Pass $ 190,922 $ 77,846 $ 2,835 $ 31,173 $ 39,802 $ 6,298 $ 2,418 $ 94,789 $ 446,083 Watch – Pass — — — 1,325 — — — — 1,325 Special Mention — 2,447 — — — — — — 2,447 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total 5+ Multi-family $ 190,922 $ 80,293 $ 2,835 $ 32,498 $ 39,802 $ 6,298 $ 2,418 $ 94,789 $ 449,855 1-4 Family construction Non-watch list – Pass $ 144 $ — $ — $ — $ — $ — $ 30,131 $ — $ 30,275 Watch – Pass — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total 1-4 Family construction $ 144 $ — $ — $ — $ — $ — $ 30,131 $ — $ 30,275 General construction Non-watch list – Pass $ 20,452 $ 2,996 $ 1,215 $ 514 $ 358 $ 2,738 $ 730,616 $ 6,310 $ 765,199 Watch – Pass — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — 3,336 — 3,336 Doubtful — 86 — — — — — — 86 Total General construction $ 20,452 $ 3,082 $ 1,215 $ 514 $ 358 $ 2,738 $ 733,952 $ 6,310 $ 768,621 The following tables provide a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total HELOC Performing $ 11,893 $ 81,964 $ 9,787 $ 3,700 $ 34 $ 2,486 $ 249,102 $ 192 $ 359,158 Non-performing — 16 26 45 — 41 3,173 — 3,301 Total HELOC $ 11,893 $ 81,980 $ 9,813 $ 3,745 $ 34 $ 2,527 $ 252,275 $ 192 $ 362,459 First lien: 1-4 family Performing $ 171,257 $ 873,810 $ 282,307 $ 75,823 $ 79,467 $ 131,807 $ 356 $ — $ 1,614,827 Non-performing — — 261 41 277 1,395 — — 1,974 Total First lien: 1-4 family $ 171,257 $ 873,810 $ 282,568 $ 75,864 $ 79,744 $ 133,202 $ 356 $ — $ 1,616,801 Junior lien: 1-4 family Performing $ 1,274 $ 8,051 $ 5,805 $ 2,009 $ 985 $ 1,983 $ 276 $ — $ 20,383 Non-performing — — 8 15 21 53 — — 97 Total Junior lien: 1-4 family $ 1,274 $ 8,051 $ 5,813 $ 2,024 $ 1,006 $ 2,036 $ 276 $ — $ 20,480 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total HELOC Performing $ 82,410 $ 11,209 $ 4,213 $ 241 $ 63 $ 2,518 $ 291,340 $ 5 $ 391,999 Non-performing — 27 50 — — 43 3,050 — 3,170 Total HELOC $ 82,410 $ 11,236 $ 4,263 $ 241 $ 63 $ 2,561 $ 294,390 $ 5 $ 395,169 First lien: 1-4 family Performing $ 896,676 $ 303,810 $ 83,429 $ 87,637 $ 77,466 $ 74,849 $ 2,579 $ — $ 1,526,446 Non-performing — 207 — 290 992 559 — — 2,048 Total First lien: 1-4 family $ 896,676 $ 304,017 $ 83,429 $ 87,927 $ 78,458 $ 75,408 $ 2,579 $ — $ 1,528,494 Junior lien: 1-4 family Performing $ 9,142 $ 6,374 $ 2,317 $ 1,225 $ 908 $ 1,456 $ 281 $ — $ 21,703 Non-performing — 9 43 22 40 14 — — 128 Total Junior lien: 1-4 family $ 9,142 $ 6,383 $ 2,360 $ 1,247 $ 948 $ 1,470 $ 281 $ — $ 21,831 The following tables provide a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2021 2020 2019 2018 2017 Prior Total Revolving line Performing $ — $ — $ — $ — $ — $ — $ 66,690 $ — $ 66,690 Non-performing — — — — — — — — — Total Revolving line $ — $ — $ — $ — $ — $ — $ 66,690 $ — $ 66,690 Auto Performing $ 3,155 $ 11,491 $ 8,693 $ 2,431 $ 1,296 $ 662 $ — $ — $ 27,728 Non-performing — 5 49 — — 1 — — 55 Total Auto $ 3,155 $ 11,496 $ 8,742 $ 2,431 $ 1,296 $ 663 $ — $ — $ 27,783 Other Performing $ 1,826 $ 4,293 $ 2,686 $ 1,883 $ 185 $ 1,044 $ 14,089 $ — $ 26,006 Non-performing — 16 — — 2 — — — 18 Total Other $ 1,826 $ 4,309 $ 2,686 $ 1,883 $ 187 $ 1,044 $ 14,089 $ — $ 26,024 December 31, 2020 Amortized Cost - Revolving Loans Amortized Cost - Revolving Loans Converted to Term Loans Risk by Collateral Amortized Cost Basis by Origination Year - Term Loans 2020 2019 2018 2017 2016 Prior Total Revolving line Performing $ — $ — $ — $ — $ — $ — $ 65,215 $ — $ 65,215 Non-performing — — — — — — — — — Total Revolving line $ — $ — $ — $ — $ — $ — $ 65,215 $ — $ 65,215 Auto Performing $ 12,465 $ 9,784 $ 2,960 $ 1,645 $ 680 $ 347 $ — $ — $ 27,881 Non-performing 5 62 — — — 1 — — 68 Total Auto $ 12,470 $ 9,846 $ 2,960 $ 1,645 $ 680 $ 348 $ — $ — $ 27,949 Other Performing $ 5,000 $ 3,200 $ 2,131 $ 214 $ 1,005 $ 172 $ 13,081 $ — $ 24,803 Non-performing 17 — — 2 — — — — 19 Total Other $ 5,017 $ 3,200 $ 2,131 $ 216 $ 1,005 $ 172 $ 13,081 $ — $ 24,822 The following table provides a summary of the amortized cost balance of consumer credit cards by risk rating as of March 31, 2021 and December 31, 2020 (in thousands): Consumer Risk March 31, 2021 December 31, 2020 Transactor accounts $ 45,854 $ 51,017 Revolver accounts (by FICO score): Less than 600 7,299 7,230 600-619 2,633 2,950 620-639 4,897 5,493 640-659 8,802 9,497 660-679 15,099 15,541 680-699 17,756 19,345 700-719 16,669 18,048 720-739 15,470 16,288 740-759 12,499 13,944 760-779 8,698 9,493 780-799 6,480 7,088 800-819 4,748 5,513 820-839 3,681 4,570 840+ 2,231 2,664 Total $ 172,816 $ 188,681 The following table provides a summary of the amortized cost balance of commercial credit cards by risk rating as of March 31, 2021 and December 31, 2020 (in thousands): Consumer Risk March 31, 2021 December 31, 2020 Current $ 176,448 $ 170,412 Past Due 7,242 7,875 Total $ 183,690 $ 178,287 The following table provides a summary of the amortized cost balance by collateral type and risk rating as of March 31, 2021 and December 31, 2020 (in thousands): Leases Other Risk March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020 Non-watch list – Pass $ 2,381 $ 2,413 $ 176,856 $ 187,924 Watch – Pass — — 664 350 Special Mention — — — — Substandard — — 206 208 Doubtful — — — — Total $ 2,381 $ 2,413 $ 177,726 $ 188,482
Rollforward of Allowance for Credit/Loan Losses by Portfolio Segment	This table provides a rollforward of the allowance for credit losses by portfolio segment for the three months ended March 31, 2021 and March 31, 2020 (in thousands): Three Months Ended March 31, 2021 Commercial and industrial Specialty lending Commercial real estate Consumer real estate Consumer Credit cards Leases and other Total - Loans HTM Total Allowance for credit losses: Beginning balance $ 122,700 $ 5,219 $ 61,931 $ 6,586 $ 1,480 $ 15,786 $ 2,271 $ 215,973 $ 2,610 $ 218,583 Charge-offs (4,717 ) — — (76 ) (109 ) (1,692 ) (8 ) (6,602 ) — (6,602 ) Recoveries 126 115 509 59 23 442 18 1,292 — 1,292 Provision 1,459 (661 ) (2,397 ) (2,386 ) (791 ) (2,392 ) (681 ) (7,849 ) 349 (7,500 ) Ending balance - ACL $ 119,568 $ 4,673 $ 60,043 $ 4,183 $ 603 $ 12,144 $ 1,600 $ 202,814 $ 2,959 $ 205,773 Allowance for credit losses on off-balance sheet credit exposures: Beginning balance $ 3,859 $ 287 $ 447 $ 145 $ 381 $ — $ 414 $ 5,533 $ 55 $ 5,588 Provision — — — — — — — — — — Ending balance - ACL on off-balance sheet $ 3,859 $ 287 $ 447 $ 145 $ 381 $ — $ 414 $ 5,533 $ 55 $ 5,588 Three Months Ended March 31, 2020 Commercial and industrial Specialty lending Commercial real estate Consumer real estate Consumer Credit cards Leases and other Total - Loans HTM Total Allowance for credit losses: Beginning balance $ 63,313 $ 2,545 $ 15,951 $ 2,623 $ 543 $ 15,739 $ 1,074 $ 101,788 $ — $ 101,788 ASU 2016-13 adjustment 3,677 148 926 152 31 914 62 5,910 3,120 9,030 Adjusted beginning balance 66,990 2,693 16,877 2,775 574 16,653 1,136 107,698 3,120 110,818 Charge-offs (1,315 ) — (6,062 ) (13 ) (248 ) (2,126 ) — (9,764 ) — (9,764 ) Recoveries 1,476 — 21 14 97 484 — 2,092 — 2,092 Provision 55,381 856 24,559 1,401 704 3,812 1,172 87,885 115 88,000 Ending balance - ACL $ 122,532 $ 3,549 $ 35,395 $ 4,177 $ 1,127 $ 18,823 $ 2,308 $ 187,911 $ 3,235 $ 191,146 Allowance for credit losses on off-balance sheet credit exposures: Beginning balance $ 2,263 $ 53 $ 257 $ 102 $ 22 $ — $ 211 $ 2,908 $ 70 $ 2,978 Provision — — — — — — — — — — Ending balance - ACL on off-balance sheet $ 2,263 $ 53 $ 257 $ 102 $ 22 $ — $ 211 $ 2,908 $ 70 $ 2,978
Summary of Amortized Cost Balance of Financial Assets Considered Collateral Dependent	The following tables provide the amortized cost balance of financial assets considered collateral dependent as of March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 Loan Segment and Type Amortized Cost of Collateral Dependent Assets Related Allowance for Credit Losses Amortized Cost of Collateral Dependent Assets with no related Allowance Commercial and industrial: Equipment/Accounts Receivable/Inventory $ 27,993 $ 4,974 $ 8,872 Agriculture 2,188 — 2,188 Total Commercial and industrial 30,181 4,974 11,060 Specialty lending: Asset-based lending 17,643 4,184 234 Factoring 1,440 — 1,440 Total Specialty lending 19,083 4,184 1,674 Commercial real estate: Owner-occupied 16,261 255 10,869 Non-owner-occupied — — — Farmland 1,829 — 1,829 5+ Multi-family — — — 1-4 Family construction — — — General construction 3,403 717 2,719 Total Commercial real estate 21,493 972 15,417 Consumer real estate: HELOC 3,301 — 3,301 First lien: 1-4 family 1,974 — 1,974 Junior lien: 1-4 family 181 — 181 Total Consumer real estate 5,456 — 5,456 Consumer: Revolving line — — — Auto 55 — 55 Other 18 — 18 Total Consumer 73 — 73 Leases and other: Leases — — — Other — — — Total Leases and other — — — Total loans $ 76,286 $ 10,130 $ 33,680 December 31, 2020 Loan Segment and Type Amortized Cost of Collateral Dependent Assets Related Allowance for Credit Losses Amortized Cost of Collateral Dependent Assets with no related Allowance Commercial and industrial: Equipment/Accounts Receivable/Inventory $ 29,684 $ 4,828 $ 5,830 Agriculture 4,086 — 4,086 Total Commercial and industrial 33,770 4,828 9,916 Specialty lending: Asset-based lending 17,875 4,490 242 Factoring 1,561 173 — Total Specialty lending 19,436 4,663 242 Commercial real estate: Owner-occupied 16,539 — 16,539 Non-owner-occupied — — — Farmland 8,625 — 8,625 5+ Multi-family — — — 1-4 Family construction — — — General construction 3,423 582 770 Total Commercial real estate 28,587 582 25,934 Consumer real estate: HELOC 3,170 — 3,170 First lien: 1-4 family 2,468 54 2,047 Junior lien: 1-4 family 212 — 212 Total Consumer real estate 5,850 54 5,429 Consumer: Revolving line — — — Auto 69 — 69 Other 19 — 19 Total Consumer 88 — 88 Leases and other: Leases — — — Other — — — Total Leases and other — — — Total loans $ 87,731 $ 10,127 $ 41,609

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Securities Available for Sale	This table provides detailed information about securities available for sale at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury $ 49,137 $ 687 $ (345 ) $ 49,479 U.S. Agencies 89,474 5,431 — 94,905 Mortgage-backed 5,928,662 140,503 (79,559 ) 5,989,606 State and political subdivisions 3,391,669 146,951 (15,679 ) 3,522,941 Corporates 93,455 3,191 (185 ) 96,461 Total $ 9,552,397 $ 296,763 $ (95,768 ) $ 9,753,392 December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury $ 29,911 $ 829 $ — $ 30,740 U.S. Agencies 89,554 6,395 — 95,949 Mortgage-backed 5,266,394 202,944 (1,157 ) 5,468,181 State and political subdivisions 3,424,309 199,848 (538 ) 3,623,619 Corporates 77,566 3,649 (16 ) 81,199 Total $ 8,887,734 $ 413,665 $ (1,711 ) $ 9,299,688
Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale	The following table shows the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2021 and December 31, 2020 (in thousands): Less than 12 months 12 months or more Total March 31, 2021 Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Description of Securities U.S. Treasury 3 $ 14,161 $ (345 ) — $ — $ — 3 $ 14,161 $ (345 ) U.S. Agencies — — — — — — — — — Mortgage-backed 168 2,871,680 (79,559 ) — — — 168 2,871,680 (79,559 ) State and political subdivisions 519 565,317 (15,477 ) 4 2,531 (202 ) 523 567,848 (15,679 ) Corporates 26 25,524 (185 ) — — — 26 25,524 (185 ) Total 716 $ 3,476,682 $ (95,566 ) 4 $ 2,531 $ (202 ) 720 $ 3,479,213 $ (95,768 ) Less than 12 months 12 months or more Total December 31, 2020 Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Count Fair Value Unrealized Losses Description of Securities U.S. Treasury — $ — $ — — $ — $ — — $ — $ — U.S. Agencies — — — — — — — — — Mortgage-backed 16 174,234 (1,157 ) — — — 16 174,234 (1,157 ) State and political subdivisions 24 55,653 (279 ) 6 2,833 (259 ) 30 58,486 (538 ) Corporates 4 5,335 (16 ) — — — 4 5,335 (16 ) Total 44 $ 235,222 $ (1,452 ) 6 $ 2,833 $ (259 ) 50 $ 238,055 $ (1,711 )
Gross Unrealized Losses and Fair Value of Investment Securities Held to Maturity	The following table shows the Company’s held to maturity investments’ gross unrealized losses and fair value, aggregated by length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2021 and December 31, 2020, respectively (in thousands): Less than 12 months 12 months or more Total March 31, 2021 Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses State and political subdivisions $ 476,985 $ (21,027 ) $ 104,720 $ (17,073 ) $ 581,705 $ (38,100 ) Total $ 476,985 $ (21,027 ) $ 104,720 $ (17,073 ) $ 581,705 $ (38,100 ) Less than 12 months 12 months or more Total December 31, 2020 Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses State and political subdivisions $ 132,271 $ (4,591 ) $ 109,712 $ (10,302 ) $ 241,983 $ (14,893 ) Total $ 132,271 $ (4,591 ) $ 109,712 $ (10,302 ) $ 241,983 $ (14,893 )
Schedule of Amortized Cost Basis by Credit Rating of Held to Maturity Investment	The following tables show the amortized cost basis by credit rating of the Company’s held to maturity investments at March 31, 2021 and December 31, 2020 (in thousands): Amortized Cost Basis by Credit Rating - HTM Debt Securities March 31, 2021 A BBB BB CCC-C Total State and political subdivisions: Competitive $ 332,322 $ 596,257 $ 17,079 $ 7,954 $ 953,612 Utilities 56,233 32,825 — — 89,058 Total state and political subdivisions $ 388,555 $ 629,082 $ 17,079 $ 7,954 $ 1,042,670 Amortized Cost Basis by Credit Rating - HTM Debt Securities December 31, 2020 A BBB BB CCC-C Total State and political subdivisions: Competitive $ 340,290 $ 558,786 $ 18,078 $ 8,135 $ 925,289 Utilities 56,232 33,093 — — 89,325 Total state and political subdivisions $ 396,522 $ 591,879 $ 18,078 $ 8,135 $ 1,014,614
Schedule of Other Securities	The table below provides detailed information for Other securities at March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 FRB and FHLB stock $ 36,222 $ 33,222 Equity securities with readily determinable fair values 133,979 134,197 Equity securities without readily determinable fair values 128,008 128,634 Total $ 298,209 $ 296,053
Schedule of Components of Investment Securities Gains, Net	The table below presents the components of Investments securities (losses) gains, net for the three months ended March 31, 2021 and March 31, 2020 (in thousands): Three Months Ended March 31, 2021 2020 Investment securities (losses) gains, net Available-for-sale debt securities: Gains realized on sales $ 2,720 $ 1,227 Equity securities with readily determinable fair values: Fair value adjustments, net (13,918 ) — Equity securities without readily determinable fair values: Fair value adjustments, net 2,862 2,293 Total investment securities (losses) gains, net $ (8,336 ) $ 3,520
Available-for-sale Securities [Member]
Contractual Maturity Information	The following table presents contractual maturity information for securities available for sale at March 31, 2021 (in thousands): Amortized Fair Cost Value Due in 1 year or less $ 227,526 $ 228,849 Due after 1 year through 5 years 539,250 556,353 Due after 5 years through 10 years 686,132 707,146 Due after 10 years 2,170,827 2,271,438 Total 3,623,735 3,763,786 Mortgage-backed securities 5,928,662 5,989,606 Total securities available for sale $ 9,552,397 $ 9,753,392
Held-to-maturity Securities [Member]
Contractual Maturity Information	The following table shows the Company’s held to maturity investments’ amortized cost, fair value, and gross unrealized gains and losses at March 31, 2021 and December 31, 2020, respectively (in thousands): Gross Gross Amortized Unrealized Unrealized Fair March 31, 2021 Cost Gains Losses Value State and political subdivisions: Due in 1 year or less $ 1,372 $ 15 $ — $ 1,387 Due after 1 year through 5 years 121,217 1,703 (137 ) 122,783 Due after 5 years through 10 years 416,437 4,020 (6,858 ) 413,599 Due after 10 years 503,644 1,821 (31,105 ) 474,360 Total state and political subdivisions $ 1,042,670 $ 7,559 $ (38,100 ) $ 1,012,129 Allowance for credit losses (2,959 ) Total state and political subdivisions, net of allowance for credit losses $ 1,039,711 Gross Gross Amortized Unrealized Unrealized Fair December 31, 2020 Cost Gains Losses Value State and political subdivisions: Due in 1 year or less $ 4,907 $ 29 $ — $ 4,936 Due after 1 year through 5 years 123,643 3,402 (144 ) 126,901 Due after 5 years through 10 years 423,759 12,845 (1,566 ) 435,038 Due after 10 years 462,305 13,447 (13,183 ) 462,569 Total state and political subdivisions $ 1,014,614 $ 29,723 $ (14,893 ) $ 1,029,444 Allowance for credit losses (2,610 ) Total state and political subdivisions, net of allowance for credit losses $ 1,012,004

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	3 Months Ended
	Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	Changes in the carrying amount of goodwill for the periods ended March 31, 2021 and December 31, 2020 by reportable segment are as follows (in thousands): Commercial Banking Institutional Banking Personal Banking Total Balances as of January 1, 2021 $ 59,419 $ 51,332 $ 70,116 $ 180,867 Sale of component of business segment — — (6,349 ) (6,349 ) Balances as of March 31, 2021 $ 59,419 $ 51,332 $ 63,767 $ 174,518 Balances as of January 1, 2020 $ 59,419 $ 51,332 $ 70,116 $ 180,867 Balances as of December 31, 2020 $ 59,419 $ 51,332 $ 70,116 $ 180,867
Changes in Intangible Assets	The following table lists the finite-lived intangible assets that continue to be subject to amortization as of March 31, 2021 and December 31, 2020 (in thousands) As of March 31, 2021 Core Deposit Intangible Assets Customer Relationships Total Gross carrying amount $ 50,059 $ 71,167 $ 121,226 Accumulated amortization 49,056 54,377 103,433 Net carrying amount $ 1,003 $ 16,790 $ 17,793 As of December 31, 2020 Core Deposit Intangible Assets Customer Relationships Total Gross carrying amount $ 50,059 $ 89,928 $ 139,987 Accumulated amortization 48,746 70,185 118,931 Net carrying amount $ 1,313 $ 19,743 $ 21,056
Aggregate Amortization Expense Recognized	The following table has the aggregate amortization expense recognized in each period (in thousands) Three Months Ended March 31, 2021 2020 Aggregate amortization expense $ 1,380 $ 1,734
Estimated Amortization Expense of Intangible Assets	The following table lists estimated amortization expense of intangible assets in future periods (in thousands): For the nine months ending December 31, 2021 $ 3,377 For the year ending December 31, 2022 3,920 For the year ending December 31, 2023 3,323 For the year ending December 31, 2024 2,704 For the year ending December 31, 2025 2,608

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	3 Months Ended
	Mar. 31, 2021
Repurchase Agreements
Remaining Contractual Maturities Of Repurchase Agreements	The table below presents the remaining contractual maturities of repurchase agreements outstanding at March 31, 2021 and December 31, 2020, in addition to the various types of marketable securities that have been pledged as collateral for these borrowings (in thousands): As of March 31, 2021 Remaining Contractual Maturities of the Agreements Overnight 30-90 Days Over 90 Days Total Repurchase agreements, secured by: U.S. Treasury $ 18,702 $ — $ — $ 18,702 U.S. Agencies 2,039,634 481,430 2,751 2,523,815 Total repurchase agreements $ 2,058,336 $ 481,430 $ 2,751 $ 2,542,517 As of December 31, 2020 Remaining Contractual Maturities of the Agreements 2-29 Days 30-90 Days Over 90 Days Total Repurchase agreements, secured by: U.S. Treasury $ 2,440 $ — $ — $ 2,440 U.S. Agencies 1,757,119 489,302 1,000 2,247,421 Total repurchase agreements $ 1,759,559 $ 489,302 $ 1,000 $ 2,249,861

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule of Segment Financial Results	Business Segment financial results for the three months ended March 31, 2021 and March 31, 2020 were as follows (in thousands): Three Months Ended March 31, 2021 Commercial Banking Institutional Banking Personal Banking Total Net interest income $ 133,032 $ 22,138 $ 38,945 $ 194,115 Provision for credit losses (8,182 ) 220 462 (7,500 ) Noninterest income 7,385 68,421 33,091 108,897 Noninterest expense 65,645 71,282 64,019 200,946 Income before taxes 82,954 19,057 7,555 109,566 Income tax expense 12,813 2,943 1,167 16,923 Net income $ 70,141 $ 16,114 $ 6,388 $ 92,643 Average assets $ 14,204,000 $ 11,603,000 $ 7,245,000 $ 33,052,000 Three Months Ended March 31, 2020 Commercial Banking Institutional Banking Personal Banking Total Net interest income $ 106,948 $ 33,036 $ 33,957 $ 173,941 Provision for credit losses 82,220 275 5,505 88,000 Noninterest income 11,240 61,952 25,232 98,424 Noninterest expense 59,043 68,453 61,123 188,619 (Loss) income before taxes (23,075 ) 26,260 (7,439 ) (4,254 ) Income tax (benefit) expense (4,421 ) 5,032 (1,426 ) (815 ) Net (loss) income $ (18,654 ) $ 21,228 $ (6,013 ) $ (3,439 ) Average assets $ 11,601,000 $ 9,011,000 $ 5,428,000 $ 26,040,000

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Summary of Disaggregation of Revenue According to Revenue Stream and Business Segment	The following table depicts the disaggregation of noninterest income according to revenue stream and Business Segment for the three months ended March 31, 2021 and March 31, 2020. As stated in Note 8, “Business Segment Reporting,” for comparability purposes, amounts in all periods are based on methodologies in effect at March 31, 2021 and previously reported results have been reclassified in this Form 10-Q to conform to the Company’s current organizational structure. Disaggregated revenue is as follows (in thousands): Three Months Ended March 31, 2021 NONINTEREST INCOME Commercial Banking Institutional Banking Personal Banking Revenue (Expense) out of Scope of ASC 606 Total Trust and securities processing $ — $ 37,485 $ 17,349 $ — $ 54,834 Trading and investment banking — 301 — 9,055 9,356 Service charges on deposit accounts 7,528 12,577 1,801 70 21,976 Insurance fees and commissions — — 420 — 420 Brokerage fees 64 1,319 1,951 — 3,334 Bankcard fees 12,369 4,813 5,107 (7,616 ) 14,673 Investment securities losses, net — — — (8,336 ) (8,336 ) Other 231 404 669 11,336 12,640 Total Noninterest income $ 20,192 $ 56,899 $ 27,297 $ 4,509 $ 108,897 Three Months Ended March 31, 2020 NONINTEREST INCOME Commercial Banking Institutional Banking Personal Banking Revenue (Expense) out of Scope of ASC 606 Total Trust and securities processing $ — $ 31,262 $ 15,738 $ — $ 47,000 Trading and investment banking — 656 — 1,067 1,723 Service charges on deposit accounts 6,892 15,607 2,539 43 25,081 Insurance fees and commissions — — 259 — 259 Brokerage fees 59 7,590 2,211 — 9,860 Bankcard fees 14,988 4,724 4,990 (8,157 ) 16,545 Investment securities gains, net — — — 3,520 3,520 Other 400 438 713 (7,115 ) (5,564 ) Total Noninterest income $ 22,339 $ 60,277 $ 26,450 $ (10,642 ) $ 98,424

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Notional Amount of Off-Balance Sheet Financial Instruments	The following table summarizes the Company’s off-balance sheet financial instruments (in thousands): Contract or Notional Amount March 31, December 31, 2021 2020 Commitments to extend credit for loans (excluding credit card loans) $ 9,353,712 $ 8,851,333 Commitments to extend credit under credit card loans 3,537,324 3,472,339 Commercial letters of credit 4,852 3,160 Standby letters of credit 331,051 346,617 Forward contracts 53,065 51,273 Spot foreign exchange contracts 3,923 680

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Fair Value of Derivative Assets and Liabilities	This table provides a summary of the fair value of the Company’s derivative assets and liabilities as of March 31, 2021 and December 31, 2020 ( in thousands Derivative Assets Derivative Liabilities March 31, December 31, March 31, December 31, Fair Value 2021 2020 2021 2020 Interest Rate Products: Derivatives not designated as hedging instruments $ 65,538 $ 103,506 $ 16,911 $ 9,375 Derivatives designated as hedging instruments 1 48 468 — Total $ 65,539 $ 103,554 $ 17,379 $ 9,375
Summary of Amount of Gain (Loss) Recognized in Interest Income and Other Non-interest Expense in Consolidated Statements of Income Related to Derivative Assets and Liabilities	This table provides a summary of the amount of gain or loss recognized in Interest income and Other noninterest expense in the Consolidated Statements of Income related to the Company’s derivative assets and liabilities for the three months ended March 31, 2021 and March 31, 2020 (in thousands) Amount of Gain (Loss) Recognized For the Three Months Ended March 31, March 31, 2021 2020 Interest Rate Products Derivatives not designated as hedging instruments $ 489 $ (259 ) Total $ 489 $ (259 ) Interest Rate Products Derivatives designated as hedging instruments: Fair value adjustments on derivatives $ 9,328 $ (203 ) Fair value adjustments on hedged items (9,251 ) 202 Total $ 77 $ (1 )
Summary of Effect of Hedges on AOCI in Consolidated Statements of Comprehensive Income Related to Company's Derivative Assets and Liabilities	These tables provide a summary of the effect of hedges on AOCI in the Consolidated Statements of Comprehensive Income related to the Company’s derivative assets and liabilities for the three months ended March 31, 2021 and March 31, 2020 (in thousands) For the Three Months Ended March 31, 2021 Derivatives in Cash Flow Hedging Relationships Gain Recognized in OCI on Derivative Gain Recognized in OCI Included Component Gain Recognized in OCI Excluded Component Gain (Loss) Reclassified from AOCI into Earnings Gain (Loss) Reclassified from AOCI into Earnings Included Component Loss Reclassified from AOCI into Earnings Excluded Component Interest rate floor $ — $ — $ — $ 1,166 $ 1,721 $ (555 ) Interest rate swaps 6,503 6,503 — (324 ) (324 ) — Total $ 6,503 $ 6,503 $ — $ 842 $ 1,397 $ (555 ) For the Three Months Ended March 31, 2020 Derivatives in Cash Flow Hedging Relationships Gain (Loss) Recognized in OCI on Derivative Gain (Loss) Recognized in OCI Included Component Loss Recognized in OCI Excluded Component Loss Reclassified from AOCI into Earnings Loss Reclassified from AOCI into Earnings Included Component Loss Reclassified from AOCI into Earnings Excluded Component Interest rate floor $ 24,934 $ 29,296 $ (4,362 ) $ (636 ) $ — $ (636 ) Interest rate swaps (10,409 ) (10,409 ) — (132 ) (132 ) — Total $ 14,525 $ 18,887 $ (4,362 ) $ (768 ) $ (132 ) $ (636 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2020 (in thousands): Fair Value Measurement at March 31, 2021 Description March 31, 2021 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets U.S. Treasury $ 3,896 $ 3,896 $ — $ — U.S. Agencies 3,933 — 3,933 — State and political subdivisions 17,296 — 17,296 — Corporates 3,133 3,133 — — Trading – other 841 841 — — Trading securities 29,099 7,870 21,229 — U.S. Treasury 49,479 49,479 — — U.S. Agencies 94,905 — 94,905 — Mortgage-backed 5,989,606 — 5,989,606 — State and political subdivisions 3,522,941 — 3,522,941 — Corporates 96,461 96,461 — — Available for sale securities 9,753,392 145,940 9,607,452 — Equity securities with readily determinable fair values 133,979 133,979 — — Company-owned life insurance 64,607 — 64,607 — Bank-owned life insurance 389,806 — 389,806 — Derivatives 65,539 — 65,539 — Total $ 10,436,422 $ 287,789 $ 10,148,633 $ — Liabilities Derivatives $ 17,379 $ — $ 17,379 $ — Securities sold not yet purchased 2,001 — 2,001 — Total $ 19,380 $ — $ 19,380 $ — Fair Value Measurement at December 31, 2020 Description December 31, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets U.S. Treasury $ 651 $ 651 $ — $ — U.S. Agencies 1,568 — 1,568 — Mortgage-backed 4 — 4 — State and political subdivisions 18,545 — 18,545 — Corporates 711 711 — — Trading – other 13,541 13,541 — — Trading securities 35,020 14,903 20,117 — U.S. Treasury 30,740 30,740 — — U.S. Agencies 95,949 — 95,949 — Mortgage-backed 5,468,181 — 5,468,181 — State and political subdivisions 3,623,619 — 3,623,619 — Corporates 81,199 81,199 — — Available for sale securities 9,299,688 111,939 9,187,749 — Equity securities with readily determinable fair values 134,197 134,197 — — Company-owned life insurance 63,575 — 63,575 — Bank-owned life insurance 387,513 — 387,513 — Derivatives 103,554 — 103,554 — Total $ 10,023,547 $ 261,039 $ 9,762,508 $ — Liabilities Derivatives $ 9,375 $ — $ 9,375 $ — Securities sold not yet purchased 2,177 — 2,177 — Total $ 11,552 $ — $ 11,552 $ —
Assets Measured at Fair Value on Non-Recurring Basis	Assets measured at fair value on a non-recurring basis as of March 31, 2021 and December 31, 2020 (in thousands): Fair Value Measurement at March 31, 2021 Using Description March 31, 2021 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses Recognized During the Three Months Ended March 31 Collateral dependent assets $ 32,476 $ — $ — $ 32,476 $ (3 ) Other real estate owned — — — — — Total $ 32,476 $ — $ — $ 32,476 $ (3 ) Fair Value Measurement at December 31, 2020 Using Description December 31, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses Recognized During the Twelve Months Ended December 31 Collateral dependent assets $ 35,995 $ — $ — $ 35,995 $ (9,389 ) Other real estate owned 2,798 — — 2,798 (938 ) Total $ 38,793 $ — $ — $ 38,793 $ (10,327 )
Estimated Fair Value of Financial Instruments	The estimated fair value of the Company’s financial instruments at March 31, 2021 and December 31, 2020 are as follows (in thousands): Fair Value Measurement at March 31, 2021 Using Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Estimated Fair Value FINANCIAL ASSETS Cash and short-term investments $ 5,877,806 $ 4,247,993 $ 1,629,813 $ — $ 5,877,806 Securities available for sale 9,753,392 145,940 9,607,452 — 9,753,392 Securities held to maturity (exclusive of allowance for credit losses) 1,042,670 — 1,012,129 — 1,012,129 Trading securities 29,099 7,870 21,229 — 29,099 Other securities 298,209 133,979 164,320 — 298,299 Loans (exclusive of allowance for credit losses) 16,507,660 — 16,820,506 — 16,820,506 Derivatives 65,539 — 65,539 — 65,539 FINANCIAL LIABILITIES Demand and savings deposits 27,616,227 27,616,227 — — 27,616,227 Time deposits 664,565 — 664,565 — 664,565 Other borrowings 2,759,818 217,301 2,542,517 — 2,759,818 Long-term debt 270,074 — 293,386 — 293,386 Derivatives 17,379 — 17,379 — 17,379 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 1,583 Commercial letters of credit 76 Standby letters of credit 777 Fair Value Measurement at December 31, 2020 Using Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Estimated Fair Value FINANCIAL ASSETS Cash and short-term investments $ 5,191,015 $ 3,540,680 $ 1,650,335 $ — $ 5,191,015 Securities available for sale 9,299,688 111,939 9,187,749 — 9,299,688 Securities held to maturity (exclusive of allowance for credit losses) 1,014,614 — 1,029,444 — 1,029,444 Trading securities 35,020 14,903 20,117 — 35,020 Other securities 296,053 134,197 161,856 — 296,053 Loans (exclusive of allowance for credit losses) 16,110,359 — 16,413,132 — 16,413,132 Derivatives 103,554 — 103,554 — 103,554 FINANCIAL LIABILITIES Demand and savings deposits 26,175,156 26,175,156 — — 26,175,156 Time deposits 876,095 — 879,841 — 879,841 Other borrowings 2,315,497 65,636 2,249,861 — 2,315,497 Long-term debt 269,595 — 299,858 — 299,858 Derivatives 9,375 — 9,375 — 9,375 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 6,405 Commercial letters of credit 150 Standby letters of credit 3,365

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Summary of Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Accounting Policies [Abstract]
Due from the FRB	$ 3,806,302		$ 1,078,701
Cash and due from banks	387,230	$ 430,638	340,553
Cash and cash equivalents at end of period	$ 4,193,532		$ 1,419,254

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounting Policies [Abstract]
Interest bearing amounts held at other financial institutions	$ 54.5	$ 30.6
Dilutive effect of common stock issuable upon exercise of options	424,109
Anti-dilutive shares	0

New Accounting Pronouncements -

New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses	$ 202,814	$ 215,973
Reduction to retained earnings, net of deferred tax balances	(1,968,318)	$ (1,891,246)
ASU Nos. 2016-13 [Member] | Cumulative Effect Adjustments [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses	9,000
Reduction to retained earnings, net of deferred tax balances	$ 7,000

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Summary of Loan Classes and Aging of Past Due Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 97,339	$ 99,644
Nonaccrual Loans	76,706	87,823
Current	16,400,046	16,004,007
Total Loans	16,497,385	16,103,651
30-89 Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	18,860	9,869
Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,773	1,952
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	33,403	38,740
Nonaccrual Loans	30,181	33,769
Current	7,136,002	7,023,334
Total Loans	7,169,405	7,062,074
Commercial and Industrial Portfolio [Member] | 30-89 Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	3,156	4,652
Commercial and Industrial Portfolio [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	66	319
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	19,083	19,437
Nonaccrual Loans	19,083	19,437
Current	501,693	491,863
Total Loans	520,776	511,300
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	33,815	30,962
Nonaccrual Loans	21,297	28,386
Current	6,116,539	5,877,972
Total Loans	6,150,354	5,908,934
Commercial Real Estate Portfolio [Member] | 30-89 Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	12,335	2,351
Commercial Real Estate Portfolio [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	183	225
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	7,093	5,869
Nonaccrual Loans	5,372	5,345
Current	1,992,647	1,939,625
Total Loans	1,999,740	1,945,494
Consumer Real Estate Portfolio [Member] | 30-89 Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,610	524
Consumer Real Estate Portfolio [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	111
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	442	489
Nonaccrual Loans	73	88
Current	120,055	117,497
Total Loans	120,497	117,986
Consumer Portfolio [Member] | 30-89 Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	196	281
Consumer Portfolio [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	173	120
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	3,503	4,147
Nonaccrual Loans	700	798
Current	353,003	362,821
Total Loans	356,506	366,968
Credit Cards Portfolio [Member] | 30-89 Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,563	2,061
Credit Cards Portfolio [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,240	1,288
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	180,107	190,895
Total Loans	$ 180,107	$ 190,895

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Proceeds from sales of loans held for sale	$ 43,163,000	$ 75,667,000
Nonaccrual Loans	76,706,000		$ 87,823,000
Restructured loans	7,900,000		10,800,000
Total Past Due	97,339,000		99,644,000
Non accrual loans with no related allowance for credit losses	34,100,000		42,122,000
Accrued interest on loans	$ 60,800,000		58,800,000
Number of reasonable and supportable forecast period	1 year
Commitments to lend to borrowers with loan modifications classified as TDR's	$ 0	$ 0
Number of Contracts	0	0
Default payment of troubled restructuring	$ 0	$ 0
Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of reasonable and supportable forecast period	1 year
Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of reasonable and supportable forecast period	3 years
Individually Evaluated Loans and Collateral Dependent Assets [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans associated allowance	$ 600,000		600,000
Greater than 90 days Past Due and Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,773,000		$ 1,952,000
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Proceeds from sales of loans held for sale	$ 43,200,000	$ 75,700,000

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Summary of Amortized Cost of Nonaccrual Loans with No Related Allowance (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	$ 76,706	$ 87,823
Amortized Cost of Nonaccrual Loans with no related Allowance	34,100	42,122
Commercial and Industrial Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	30,181	33,769
Amortized Cost of Nonaccrual Loans with no related Allowance	11,060	9,916
Specialty Lending Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	19,083	19,437
Amortized Cost of Nonaccrual Loans with no related Allowance	1,674	242
Commercial Real Estate Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	21,297	28,386
Amortized Cost of Nonaccrual Loans with no related Allowance	15,221	25,733
Consumer Real Estate Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	5,372	5,345
Amortized Cost of Nonaccrual Loans with no related Allowance	5,372	5,345
Consumer Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	73	88
Amortized Cost of Nonaccrual Loans with no related Allowance	73	88
Credit Cards Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	700	798
Amortized Cost of Nonaccrual Loans with no related Allowance	$ 700	$ 798

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance of Each of Loan Classes Disaggregated by Collateral Type and Origination Year (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	$ 1,880,011	$ 6,232,622
Amortized Cost Basis by Origination Year 2020	5,273,469	2,122,556
Amortized Cost Basis by Origination Year 2019	2,082,251	1,075,973
Amortized Cost Basis by Origination Year 2018	1,042,180	694,095
Amortized Cost Basis by Origination Year 2017	577,026	786,120
Amortized Cost Basis by Origination Year Prior to 2017	1,085,893	481,977
Amortized Cost - Revolving Loans	4,431,097	4,459,302
Amortized Cost - Revolving Loans Converted to Term Loans	125,458	251,006
Total Loans	16,497,385	16,103,651
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,057,600	3,194,475
Amortized Cost Basis by Origination Year 2020	2,377,913	690,983
Amortized Cost Basis by Origination Year 2019	642,222	473,926
Amortized Cost Basis by Origination Year 2018	454,860	188,818
Amortized Cost Basis by Origination Year 2017	176,057	180,740
Amortized Cost Basis by Origination Year Prior to 2017	204,731	70,015
Amortized Cost - Revolving Loans	2,250,396	2,263,079
Amortized Cost - Revolving Loans Converted to Term Loans	5,626	38
Total Loans	7,169,405	7,062,074
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,054,638	3,185,589
Amortized Cost Basis by Origination Year 2020	2,369,843	684,488
Amortized Cost Basis by Origination Year 2019	637,469	471,950
Amortized Cost Basis by Origination Year 2018	453,289	185,167
Amortized Cost Basis by Origination Year 2017	173,635	178,576
Amortized Cost Basis by Origination Year Prior to 2017	202,850	69,599
Amortized Cost - Revolving Loans	2,115,942	2,108,799
Amortized Cost - Revolving Loans Converted to Term Loans	5,626
Total Loans	7,013,292	6,884,168
Commercial and Industrial Portfolio [Member] | Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,962	8,886
Amortized Cost Basis by Origination Year 2020	8,070	6,495
Amortized Cost Basis by Origination Year 2019	4,753	1,976
Amortized Cost Basis by Origination Year 2018	1,571	3,651
Amortized Cost Basis by Origination Year 2017	2,422	2,164
Amortized Cost Basis by Origination Year Prior to 2017	1,881	416
Amortized Cost - Revolving Loans	122,856	137,955
Amortized Cost - Revolving Loans Converted to Term Loans		38
Total Loans	144,515	161,581
Commercial and Industrial Portfolio [Member] | Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	11,598	16,325
Total Loans	11,598	16,325
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,387	64,258
Amortized Cost Basis by Origination Year 2020	61,950
Amortized Cost - Revolving Loans	456,439	447,042
Total Loans	520,776	511,300
Specialty Lending Portfolio [Member] | Asset-based Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,387	64,258
Amortized Cost Basis by Origination Year 2020	61,950
Amortized Cost - Revolving Loans	303,994	291,091
Total Loans	368,331	355,349
Specialty Lending Portfolio [Member] | Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	152,445	155,951
Total Loans	152,445	155,951
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	629,991	1,934,548
Amortized Cost Basis by Origination Year 2020	1,822,218	1,085,218
Amortized Cost Basis by Origination Year 2019	1,120,082	499,245
Amortized Cost Basis by Origination Year 2018	494,820	410,603
Amortized Cost Basis by Origination Year 2017	315,787	522,903
Amortized Cost Basis by Origination Year Prior to 2017	739,544	330,646
Amortized Cost - Revolving Loans	908,272	874,808
Amortized Cost - Revolving Loans Converted to Term Loans	119,640	250,963
Total Loans	6,150,354	5,908,934
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	120,177	579,212
Amortized Cost Basis by Origination Year 2020	583,506	334,098
Amortized Cost Basis by Origination Year 2019	315,070	233,192
Amortized Cost Basis by Origination Year 2018	252,097	170,913
Amortized Cost Basis by Origination Year 2017	156,162	120,603
Amortized Cost Basis by Origination Year Prior to 2017	263,986	176,377
Amortized Cost - Revolving Loans	18,297	18,880
Amortized Cost - Revolving Loans Converted to Term Loans	3,639	51,910
Total Loans	1,712,934	1,685,185
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	465,337	846,030
Amortized Cost Basis by Origination Year 2020	705,983	630,457
Amortized Cost Basis by Origination Year 2019	660,048	230,549
Amortized Cost Basis by Origination Year 2018	209,190	169,193
Amortized Cost Basis by Origination Year 2017	126,261	333,215
Amortized Cost Basis by Origination Year Prior to 2017	386,854	115,753
Amortized Cost - Revolving Loans	21,639	49,384
Amortized Cost - Revolving Loans Converted to Term Loans	116,001	97,954
Total Loans	2,691,313	2,472,535
Commercial Real Estate Portfolio [Member] | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	30,449	297,788
Amortized Cost Basis by Origination Year 2020	284,001	37,288
Amortized Cost Basis by Origination Year 2019	35,557	31,454
Amortized Cost Basis by Origination Year 2018	29,720	37,485
Amortized Cost Basis by Origination Year 2017	29,150	28,925
Amortized Cost Basis by Origination Year Prior to 2017	48,835	29,480
Amortized Cost - Revolving Loans	36,470	40,043
Total Loans	494,182	502,463
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	4,871	190,922
Amortized Cost Basis by Origination Year 2020	228,665	80,293
Amortized Cost Basis by Origination Year 2019	106,403	2,835
Amortized Cost Basis by Origination Year 2018	2,669	32,498
Amortized Cost Basis by Origination Year 2017	3,816	39,802
Amortized Cost Basis by Origination Year Prior to 2017	39,504	6,298
Amortized Cost - Revolving Loans	1,820	2,418
Amortized Cost - Revolving Loans Converted to Term Loans		94,789
Total Loans	387,748	449,855
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		144
Amortized Cost - Revolving Loans	39,046	30,131
Total Loans	39,046	30,275
Commercial Real Estate Portfolio [Member] | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	9,157	20,452
Amortized Cost Basis by Origination Year 2020	20,063	3,082
Amortized Cost Basis by Origination Year 2019	3,004	1,215
Amortized Cost Basis by Origination Year 2018	1,144	514
Amortized Cost Basis by Origination Year 2017	398	358
Amortized Cost Basis by Origination Year Prior to 2017	365	2,738
Amortized Cost - Revolving Loans	791,000	733,952
Amortized Cost - Revolving Loans Converted to Term Loans		6,310
Total Loans	825,131	768,621
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	184,424	988,228
Amortized Cost Basis by Origination Year 2020	963,841	321,636
Amortized Cost Basis by Origination Year 2019	298,194	90,052
Amortized Cost Basis by Origination Year 2018	81,633	89,415
Amortized Cost Basis by Origination Year 2017	80,784	79,469
Amortized Cost Basis by Origination Year Prior to 2017	137,765	79,439
Amortized Cost - Revolving Loans	252,907	297,250
Amortized Cost - Revolving Loans Converted to Term Loans	192	5
Total Loans	1,999,740	1,945,494
Consumer Real Estate Portfolio [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	11,893	82,410
Amortized Cost Basis by Origination Year 2020	81,980	11,236
Amortized Cost Basis by Origination Year 2019	9,813	4,263
Amortized Cost Basis by Origination Year 2018	3,745	241
Amortized Cost Basis by Origination Year 2017	34	63
Amortized Cost Basis by Origination Year Prior to 2017	2,527	2,561
Amortized Cost - Revolving Loans	252,275	294,390
Amortized Cost - Revolving Loans Converted to Term Loans	192	5
Total Loans	362,459	395,169
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	171,257	896,676
Amortized Cost Basis by Origination Year 2020	873,810	304,017
Amortized Cost Basis by Origination Year 2019	282,568	83,429
Amortized Cost Basis by Origination Year 2018	75,864	87,927
Amortized Cost Basis by Origination Year 2017	79,744	78,458
Amortized Cost Basis by Origination Year Prior to 2017	133,202	75,408
Amortized Cost - Revolving Loans	356	2,579
Total Loans	1,616,801	1,528,494
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,274	9,142
Amortized Cost Basis by Origination Year 2020	8,051	6,383
Amortized Cost Basis by Origination Year 2019	5,813	2,360
Amortized Cost Basis by Origination Year 2018	2,024	1,247
Amortized Cost Basis by Origination Year 2017	1,006	948
Amortized Cost Basis by Origination Year Prior to 2017	2,036	1,470
Amortized Cost - Revolving Loans	276	281
Total Loans	20,480	21,831
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	4,981	17,487
Amortized Cost Basis by Origination Year 2020	15,805	13,046
Amortized Cost Basis by Origination Year 2019	11,428	5,091
Amortized Cost Basis by Origination Year 2018	4,314	1,861
Amortized Cost Basis by Origination Year 2017	1,483	1,685
Amortized Cost Basis by Origination Year Prior to 2017	1,707	520
Amortized Cost - Revolving Loans	80,779	78,296
Total Loans	120,497	117,986
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	66,690	65,215
Total Loans	66,690	65,215
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	3,155	12,470
Amortized Cost Basis by Origination Year 2020	11,496	9,846
Amortized Cost Basis by Origination Year 2019	8,742	2,960
Amortized Cost Basis by Origination Year 2018	2,431	1,645
Amortized Cost Basis by Origination Year 2017	1,296	680
Amortized Cost Basis by Origination Year Prior to 2017	663	348
Total Loans	27,783	27,949
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,826	5,017
Amortized Cost Basis by Origination Year 2020	4,309	3,200
Amortized Cost Basis by Origination Year 2019	2,686	2,131
Amortized Cost Basis by Origination Year 2018	1,883	216
Amortized Cost Basis by Origination Year 2017	187	1,005
Amortized Cost Basis by Origination Year Prior to 2017	1,044	172
Amortized Cost - Revolving Loans	14,089	13,081
Total Loans	26,024	24,822
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	356,506	366,968
Total Loans	356,506	366,968
Credit Cards Portfolio [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	172,816	188,681
Total Loans	172,816	188,681
Credit Cards Portfolio [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	183,690	178,287
Total Loans	183,690	178,287
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	628	33,626
Amortized Cost Basis by Origination Year 2020	31,742	11,673
Amortized Cost Basis by Origination Year 2019	10,325	7,659
Amortized Cost Basis by Origination Year 2018	6,553	3,398
Amortized Cost Basis by Origination Year 2017	2,915	1,323
Amortized Cost Basis by Origination Year Prior to 2017	2,146	1,357
Amortized Cost - Revolving Loans	125,798	131,859
Total Loans	180,107	190,895
Leases and Other Portfolio [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		915
Amortized Cost Basis by Origination Year 2019	915
Amortized Cost Basis by Origination Year 2018		787
Amortized Cost Basis by Origination Year 2017	787
Amortized Cost Basis by Origination Year Prior to 2017	679	711
Total Loans	2,381	2,413
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	628	33,626
Amortized Cost Basis by Origination Year 2020	31,742	10,758
Amortized Cost Basis by Origination Year 2019	9,410	7,659
Amortized Cost Basis by Origination Year 2018	6,553	2,611
Amortized Cost Basis by Origination Year 2017	2,128	1,323
Amortized Cost Basis by Origination Year Prior to 2017	1,467	646
Amortized Cost - Revolving Loans	125,798	131,859
Total Loans	$ 177,726	$ 188,482

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance by Collateral Type and Risk Rating (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	$ 1,880,011	$ 6,232,622
Amortized Cost Basis by Origination Year 2020	5,273,469	2,122,556
Amortized Cost Basis by Origination Year 2019	2,082,251	1,075,973
Amortized Cost Basis by Origination Year 2018	1,042,180	694,095
Amortized Cost Basis by Origination Year 2017	577,026	786,120
Amortized Cost Basis by Origination Year Prior to 2017	1,085,893	481,977
Amortized Cost - Revolving Loans	4,431,097	4,459,302
Amortized Cost - Revolving Loans Converted to Term Loans	125,458	251,006
Total Loans	16,497,385	16,103,651
Current	16,400,046	16,004,007
Total Past Due	97,339	99,644
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,057,600	3,194,475
Amortized Cost Basis by Origination Year 2020	2,377,913	690,983
Amortized Cost Basis by Origination Year 2019	642,222	473,926
Amortized Cost Basis by Origination Year 2018	454,860	188,818
Amortized Cost Basis by Origination Year 2017	176,057	180,740
Amortized Cost Basis by Origination Year Prior to 2017	204,731	70,015
Amortized Cost - Revolving Loans	2,250,396	2,263,079
Amortized Cost - Revolving Loans Converted to Term Loans	5,626	38
Total Loans	7,169,405	7,062,074
Current	7,136,002	7,023,334
Total Past Due	33,403	38,740
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,054,638	3,185,589
Amortized Cost Basis by Origination Year 2020	2,369,843	684,488
Amortized Cost Basis by Origination Year 2019	637,469	471,950
Amortized Cost Basis by Origination Year 2018	453,289	185,167
Amortized Cost Basis by Origination Year 2017	173,635	178,576
Amortized Cost Basis by Origination Year Prior to 2017	202,850	69,599
Amortized Cost - Revolving Loans	2,115,942	2,108,799
Amortized Cost - Revolving Loans Converted to Term Loans	5,626
Total Loans	7,013,292	6,884,168
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	929,053	2,975,305
Amortized Cost Basis by Origination Year 2020	2,249,057	664,016
Amortized Cost Basis by Origination Year 2019	622,060	439,460
Amortized Cost Basis by Origination Year 2018	429,748	171,409
Amortized Cost Basis by Origination Year 2017	154,191	165,321
Amortized Cost Basis by Origination Year Prior to 2017	188,618	67,442
Amortized Cost - Revolving Loans	1,983,266	1,948,261
Amortized Cost - Revolving Loans Converted to Term Loans	5,626
Total Loans	6,561,619	6,431,214
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	52,371	89,746
Amortized Cost Basis by Origination Year 2020	86,080	10,400
Amortized Cost Basis by Origination Year 2019	15,178	9,309
Amortized Cost Basis by Origination Year 2018	14,817	5,126
Amortized Cost Basis by Origination Year 2017	11,005	11,044
Amortized Cost Basis by Origination Year Prior to 2017	11,865	1,592
Amortized Cost - Revolving Loans	67,607	70,768
Total Loans	258,923	197,985
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	35,006	53,334
Amortized Cost Basis by Origination Year 2020	3,851	9,788
Amortized Cost Basis by Origination Year 2019		15,524
Amortized Cost Basis by Origination Year 2018	1,384	1,898
Amortized Cost Basis by Origination Year 2017	1,893	2,158
Amortized Cost Basis by Origination Year Prior to 2017	1,456
Amortized Cost - Revolving Loans	5,949	8,485
Total Loans	49,539	91,187
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	38,208	67,118
Amortized Cost Basis by Origination Year 2020	30,769	231
Amortized Cost Basis by Origination Year 2019	231	7,657
Amortized Cost Basis by Origination Year 2018	3,866	1,369
Amortized Cost Basis by Origination Year 2017	1,346	53
Amortized Cost Basis by Origination Year Prior to 2017	911	565
Amortized Cost - Revolving Loans	59,120	81,246
Total Loans	134,451	158,239
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		86
Amortized Cost Basis by Origination Year 2020	86	53
Amortized Cost Basis by Origination Year 2018	3,474	5,365
Amortized Cost Basis by Origination Year 2017	5,200
Amortized Cost - Revolving Loans		39
Total Loans	8,760	5,543
Commercial and Industrial Portfolio [Member] | Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,962	8,886
Amortized Cost Basis by Origination Year 2020	8,070	6,495
Amortized Cost Basis by Origination Year 2019	4,753	1,976
Amortized Cost Basis by Origination Year 2018	1,571	3,651
Amortized Cost Basis by Origination Year 2017	2,422	2,164
Amortized Cost Basis by Origination Year Prior to 2017	1,881	416
Amortized Cost - Revolving Loans	122,856	137,955
Amortized Cost - Revolving Loans Converted to Term Loans		38
Total Loans	144,515	161,581
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,907	7,880
Amortized Cost Basis by Origination Year 2020	7,360	3,924
Amortized Cost Basis by Origination Year 2019	3,688	1,389
Amortized Cost Basis by Origination Year 2018	984	1,379
Amortized Cost Basis by Origination Year 2017	686	1,759
Amortized Cost Basis by Origination Year Prior to 2017	1,690	404
Amortized Cost - Revolving Loans	81,256	92,917
Amortized Cost - Revolving Loans Converted to Term Loans		38
Total Loans	98,571	109,690
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	55	179
Amortized Cost Basis by Origination Year 2020	124	2,571
Amortized Cost Basis by Origination Year 2019	578	188
Amortized Cost Basis by Origination Year 2018	188	102
Amortized Cost Basis by Origination Year 2017	102	345
Amortized Cost Basis by Origination Year Prior to 2017	142
Amortized Cost - Revolving Loans	14,278	17,956
Total Loans	15,467	21,341
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		303
Amortized Cost Basis by Origination Year 2020	273
Amortized Cost Basis by Origination Year 2019	487	399
Amortized Cost Basis by Origination Year 2018	399	22
Amortized Cost Basis by Origination Year 2017	22
Amortized Cost Basis by Origination Year Prior to 2017		12
Amortized Cost - Revolving Loans	8,480	6,674
Total Loans	9,661	7,410
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		524
Amortized Cost Basis by Origination Year 2020	313
Amortized Cost Basis by Origination Year 2018		2,148
Amortized Cost Basis by Origination Year 2017	1,612	60
Amortized Cost Basis by Origination Year Prior to 2017	49
Amortized Cost - Revolving Loans	18,842	20,408
Total Loans	20,816	23,140
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,387	64,258
Amortized Cost Basis by Origination Year 2020	61,950
Amortized Cost - Revolving Loans	456,439	447,042
Total Loans	520,776	511,300
Current	501,693	491,863
Total Past Due	19,083	19,437
Specialty Lending Portfolio [Member] | Asset-based [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	2,387	64,258
Amortized Cost Basis by Origination Year 2020	61,950
Amortized Cost - Revolving Loans	303,994	291,091
Total Loans	368,331	355,349
Specialty Lending Portfolio [Member] | Asset-based [Member] | In-margin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	350,922	331,360
Specialty Lending Portfolio [Member] | Asset-based [Member] | Out-of-margin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	17,409	23,989
Specialty Lending Portfolio [Member] | Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	152,445	155,951
Total Loans	152,445	155,951
Specialty Lending Portfolio [Member] | Factoring [Member] | Tier 1 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,144	10,774
Specialty Lending Portfolio [Member] | Factoring [Member] | Tier 2 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	56,461	135,861
Specialty Lending Portfolio [Member] | Factoring [Member] | Individually Evaluated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	87,400	7,755
Specialty Lending Portfolio [Member] | Factoring [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,440	1,561
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	629,991	1,934,548
Amortized Cost Basis by Origination Year 2020	1,822,218	1,085,218
Amortized Cost Basis by Origination Year 2019	1,120,082	499,245
Amortized Cost Basis by Origination Year 2018	494,820	410,603
Amortized Cost Basis by Origination Year 2017	315,787	522,903
Amortized Cost Basis by Origination Year Prior to 2017	739,544	330,646
Amortized Cost - Revolving Loans	908,272	874,808
Amortized Cost - Revolving Loans Converted to Term Loans	119,640	250,963
Total Loans	6,150,354	5,908,934
Current	6,116,539	5,877,972
Total Past Due	33,815	30,962
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	120,177	579,212
Amortized Cost Basis by Origination Year 2020	583,506	334,098
Amortized Cost Basis by Origination Year 2019	315,070	233,192
Amortized Cost Basis by Origination Year 2018	252,097	170,913
Amortized Cost Basis by Origination Year 2017	156,162	120,603
Amortized Cost Basis by Origination Year Prior to 2017	263,986	176,377
Amortized Cost - Revolving Loans	18,297	18,880
Amortized Cost - Revolving Loans Converted to Term Loans	3,639	51,910
Total Loans	1,712,934	1,685,185
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	119,343	568,636
Amortized Cost Basis by Origination Year 2020	574,043	327,579
Amortized Cost Basis by Origination Year 2019	306,753	227,581
Amortized Cost Basis by Origination Year 2018	245,581	141,758
Amortized Cost Basis by Origination Year 2017	127,363	118,593
Amortized Cost Basis by Origination Year Prior to 2017	247,605	163,292
Amortized Cost - Revolving Loans	14,023	15,052
Amortized Cost - Revolving Loans Converted to Term Loans	3,639	51,910
Total Loans	1,638,350	1,614,401
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		1,712
Amortized Cost Basis by Origination Year 2020	2,335	6,413
Amortized Cost Basis by Origination Year 2019	8,217	4,761
Amortized Cost Basis by Origination Year 2018	5,729	1,194
Amortized Cost Basis by Origination Year 2017	1,181
Amortized Cost Basis by Origination Year Prior to 2017	10,254	8,581
Amortized Cost - Revolving Loans	568
Total Loans	28,284	22,661
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	106	1,424
Amortized Cost Basis by Origination Year 2020	1,394
Amortized Cost Basis by Origination Year 2017		1,588
Amortized Cost Basis by Origination Year Prior to 2017	2,564
Total Loans	4,064	3,012
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	728	7,440
Amortized Cost Basis by Origination Year 2020	5,734	106
Amortized Cost Basis by Origination Year 2019	100	850
Amortized Cost Basis by Origination Year 2018	787	27,961
Amortized Cost Basis by Origination Year 2017	27,618	422
Amortized Cost Basis by Origination Year Prior to 2017	3,563	4,504
Amortized Cost - Revolving Loans	3,706	3,828
Total Loans	42,236	45,111
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	465,337	846,030
Amortized Cost Basis by Origination Year 2020	705,983	630,457
Amortized Cost Basis by Origination Year 2019	660,048	230,549
Amortized Cost Basis by Origination Year 2018	209,190	169,193
Amortized Cost Basis by Origination Year 2017	126,261	333,215
Amortized Cost Basis by Origination Year Prior to 2017	386,854	115,753
Amortized Cost - Revolving Loans	21,639	49,384
Amortized Cost - Revolving Loans Converted to Term Loans	116,001	97,954
Total Loans	2,691,313	2,472,535
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	431,837	802,078
Amortized Cost Basis by Origination Year 2020	695,641	525,246
Amortized Cost Basis by Origination Year 2019	547,676	205,484
Amortized Cost Basis by Origination Year 2018	184,201	156,290
Amortized Cost Basis by Origination Year 2017	120,831	294,979
Amortized Cost Basis by Origination Year Prior to 2017	334,679	101,616
Amortized Cost - Revolving Loans	21,639	49,384
Amortized Cost - Revolving Loans Converted to Term Loans	116,001	81,499
Total Loans	2,452,505	2,216,576
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	33,500	43,769
Amortized Cost Basis by Origination Year 2020	1,326	45,748
Amortized Cost Basis by Origination Year 2019	60,675	25,065
Amortized Cost Basis by Origination Year 2018	24,989	12,903
Amortized Cost Basis by Origination Year 2017	5,430	1,936
Amortized Cost Basis by Origination Year Prior to 2017	9,530	7,701
Amortized Cost - Revolving Loans Converted to Term Loans		16,455
Total Loans	135,450	153,577
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		183
Amortized Cost Basis by Origination Year 2020	9,016	32,953
Amortized Cost Basis by Origination Year 2019	25,187
Amortized Cost Basis by Origination Year 2017		36,300
Amortized Cost Basis by Origination Year Prior to 2017	41,335	5,100
Total Loans	75,538	74,536
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		26,510
Amortized Cost Basis by Origination Year 2019	26,510
Amortized Cost Basis by Origination Year Prior to 2017	1,310	1,336
Total Loans	27,820	27,846
Commercial Real Estate Portfolio [Member] | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	30,449	297,788
Amortized Cost Basis by Origination Year 2020	284,001	37,288
Amortized Cost Basis by Origination Year 2019	35,557	31,454
Amortized Cost Basis by Origination Year 2018	29,720	37,485
Amortized Cost Basis by Origination Year 2017	29,150	28,925
Amortized Cost Basis by Origination Year Prior to 2017	48,835	29,480
Amortized Cost - Revolving Loans	36,470	40,043
Total Loans	494,182	502,463
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	10,019	237,124
Amortized Cost Basis by Origination Year 2020	237,511	27,815
Amortized Cost Basis by Origination Year 2019	26,282	15,907
Amortized Cost Basis by Origination Year 2018	15,149	26,071
Amortized Cost Basis by Origination Year 2017	22,288	13,376
Amortized Cost Basis by Origination Year Prior to 2017	18,170	8,924
Amortized Cost - Revolving Loans	17,976	19,074
Total Loans	347,395	348,291
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	6,413	20,992
Amortized Cost Basis by Origination Year 2020	20,732	9,221
Amortized Cost Basis by Origination Year 2019	8,720	13,404
Amortized Cost Basis by Origination Year 2018	13,404	5,133
Amortized Cost Basis by Origination Year 2017	4,523	6,301
Amortized Cost Basis by Origination Year Prior to 2017	23,843	19,835
Amortized Cost - Revolving Loans	15,887	17,699
Total Loans	93,522	92,585
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2019	303	630
Amortized Cost Basis by Origination Year 2018	630	1,854
Amortized Cost Basis by Origination Year 2017	2,339	4,901
Amortized Cost Basis by Origination Year Prior to 2017	4,890	40
Amortized Cost - Revolving Loans	476	861
Total Loans	8,638	8,286
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	14,017	39,672
Amortized Cost Basis by Origination Year 2020	25,758	252
Amortized Cost Basis by Origination Year 2019	252	1,513
Amortized Cost Basis by Origination Year 2018	537	4,427
Amortized Cost Basis by Origination Year 2017		4,347
Amortized Cost Basis by Origination Year Prior to 2017	1,932	681
Amortized Cost - Revolving Loans	2,131	2,409
Total Loans	44,627	53,301
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	4,871	190,922
Amortized Cost Basis by Origination Year 2020	228,665	80,293
Amortized Cost Basis by Origination Year 2019	106,403	2,835
Amortized Cost Basis by Origination Year 2018	2,669	32,498
Amortized Cost Basis by Origination Year 2017	3,816	39,802
Amortized Cost Basis by Origination Year Prior to 2017	39,504	6,298
Amortized Cost - Revolving Loans	1,820	2,418
Amortized Cost - Revolving Loans Converted to Term Loans		94,789
Total Loans	387,748	449,855
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	4,871	190,922
Amortized Cost Basis by Origination Year 2020	228,665	77,846
Amortized Cost Basis by Origination Year 2019	82,373	2,835
Amortized Cost Basis by Origination Year 2018	2,669	31,173
Amortized Cost Basis by Origination Year 2017	2,499	39,802
Amortized Cost Basis by Origination Year Prior to 2017	39,504	6,298
Amortized Cost - Revolving Loans	1,820	2,418
Amortized Cost - Revolving Loans Converted to Term Loans		94,789
Total Loans	362,401	446,083
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2019	21,597
Amortized Cost Basis by Origination Year 2018		1,325
Total Loans	21,597	1,325
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		2,447
Total Loans		2,447
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2019	2,433
Amortized Cost Basis by Origination Year 2017	1,317
Total Loans	3,750
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		144
Amortized Cost - Revolving Loans	39,046	30,131
Total Loans	39,046	30,275
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		144
Amortized Cost - Revolving Loans	39,046	30,131
Total Loans	39,046	30,275
Commercial Real Estate Portfolio [Member] | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	9,157	20,452
Amortized Cost Basis by Origination Year 2020	20,063	3,082
Amortized Cost Basis by Origination Year 2019	3,004	1,215
Amortized Cost Basis by Origination Year 2018	1,144	514
Amortized Cost Basis by Origination Year 2017	398	358
Amortized Cost Basis by Origination Year Prior to 2017	365	2,738
Amortized Cost - Revolving Loans	791,000	733,952
Amortized Cost - Revolving Loans Converted to Term Loans		6,310
Total Loans	825,131	768,621
Commercial Real Estate Portfolio [Member] | General Construction [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	9,157	20,452
Amortized Cost Basis by Origination Year 2020	20,063	2,996
Amortized Cost Basis by Origination Year 2019	2,918	1,215
Amortized Cost Basis by Origination Year 2018	1,144	514
Amortized Cost Basis by Origination Year 2017	398	358
Amortized Cost Basis by Origination Year Prior to 2017	365	2,738
Amortized Cost - Revolving Loans	787,683	730,616
Amortized Cost - Revolving Loans Converted to Term Loans		6,310
Total Loans	821,728	765,199
Commercial Real Estate Portfolio [Member] | General Construction [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	3,317	3,336
Total Loans	3,317	3,336
Commercial Real Estate Portfolio [Member] | General Construction [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		86
Amortized Cost Basis by Origination Year 2019	86
Total Loans	86	86
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	184,424	988,228
Amortized Cost Basis by Origination Year 2020	963,841	321,636
Amortized Cost Basis by Origination Year 2019	298,194	90,052
Amortized Cost Basis by Origination Year 2018	81,633	89,415
Amortized Cost Basis by Origination Year 2017	80,784	79,469
Amortized Cost Basis by Origination Year Prior to 2017	137,765	79,439
Amortized Cost - Revolving Loans	252,907	297,250
Amortized Cost - Revolving Loans Converted to Term Loans	192	5
Total Loans	1,999,740	1,945,494
Current	1,992,647	1,939,625
Total Past Due	7,093	5,869
Consumer Real Estate Portfolio [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	11,893	82,410
Amortized Cost Basis by Origination Year 2020	81,980	11,236
Amortized Cost Basis by Origination Year 2019	9,813	4,263
Amortized Cost Basis by Origination Year 2018	3,745	241
Amortized Cost Basis by Origination Year 2017	34	63
Amortized Cost Basis by Origination Year Prior to 2017	2,527	2,561
Amortized Cost - Revolving Loans	252,275	294,390
Amortized Cost - Revolving Loans Converted to Term Loans	192	5
Total Loans	362,459	395,169
Consumer Real Estate Portfolio [Member] | HELOC [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	11,893	82,410
Amortized Cost Basis by Origination Year 2020	81,964	11,209
Amortized Cost Basis by Origination Year 2019	9,787	4,213
Amortized Cost Basis by Origination Year 2018	3,700	241
Amortized Cost Basis by Origination Year 2017	34	63
Amortized Cost Basis by Origination Year Prior to 2017	2,486	2,518
Amortized Cost - Revolving Loans	249,102	291,340
Amortized Cost - Revolving Loans Converted to Term Loans	192	5
Total Loans	359,158	391,999
Consumer Real Estate Portfolio [Member] | HELOC [Member] | Non-performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020	16	27
Amortized Cost Basis by Origination Year 2019	26	50
Amortized Cost Basis by Origination Year 2018	45
Amortized Cost Basis by Origination Year Prior to 2017	41	43
Amortized Cost - Revolving Loans	3,173	3,050
Total Loans	3,301	3,170
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	171,257	896,676
Amortized Cost Basis by Origination Year 2020	873,810	304,017
Amortized Cost Basis by Origination Year 2019	282,568	83,429
Amortized Cost Basis by Origination Year 2018	75,864	87,927
Amortized Cost Basis by Origination Year 2017	79,744	78,458
Amortized Cost Basis by Origination Year Prior to 2017	133,202	75,408
Amortized Cost - Revolving Loans	356	2,579
Total Loans	1,616,801	1,528,494
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	171,257	896,676
Amortized Cost Basis by Origination Year 2020	873,810	303,810
Amortized Cost Basis by Origination Year 2019	282,307	83,429
Amortized Cost Basis by Origination Year 2018	75,823	87,637
Amortized Cost Basis by Origination Year 2017	79,467	77,466
Amortized Cost Basis by Origination Year Prior to 2017	131,807	74,849
Amortized Cost - Revolving Loans	356	2,579
Total Loans	1,614,827	1,526,446
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] | Non-performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		207
Amortized Cost Basis by Origination Year 2019	261
Amortized Cost Basis by Origination Year 2018	41	290
Amortized Cost Basis by Origination Year 2017	277	992
Amortized Cost Basis by Origination Year Prior to 2017	1,395	559
Total Loans	1,974	2,048
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,274	9,142
Amortized Cost Basis by Origination Year 2020	8,051	6,383
Amortized Cost Basis by Origination Year 2019	5,813	2,360
Amortized Cost Basis by Origination Year 2018	2,024	1,247
Amortized Cost Basis by Origination Year 2017	1,006	948
Amortized Cost Basis by Origination Year Prior to 2017	2,036	1,470
Amortized Cost - Revolving Loans	276	281
Total Loans	20,480	21,831
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,274	9,142
Amortized Cost Basis by Origination Year 2020	8,051	6,374
Amortized Cost Basis by Origination Year 2019	5,805	2,317
Amortized Cost Basis by Origination Year 2018	2,009	1,225
Amortized Cost Basis by Origination Year 2017	985	908
Amortized Cost Basis by Origination Year Prior to 2017	1,983	1,456
Amortized Cost - Revolving Loans	276	281
Total Loans	20,383	21,703
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] | Non-performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		9
Amortized Cost Basis by Origination Year 2019	8	43
Amortized Cost Basis by Origination Year 2018	15	22
Amortized Cost Basis by Origination Year 2017	21	40
Amortized Cost Basis by Origination Year Prior to 2017	53	14
Total Loans	97	128
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	4,981	17,487
Amortized Cost Basis by Origination Year 2020	15,805	13,046
Amortized Cost Basis by Origination Year 2019	11,428	5,091
Amortized Cost Basis by Origination Year 2018	4,314	1,861
Amortized Cost Basis by Origination Year 2017	1,483	1,685
Amortized Cost Basis by Origination Year Prior to 2017	1,707	520
Amortized Cost - Revolving Loans	80,779	78,296
Total Loans	120,497	117,986
Current	120,055	117,497
Total Past Due	442	489
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	66,690	65,215
Total Loans	66,690	65,215
Consumer Portfolio [Member] | Revolving Line [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	66,690	65,215
Total Loans	66,690	65,215
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	3,155	12,470
Amortized Cost Basis by Origination Year 2020	11,496	9,846
Amortized Cost Basis by Origination Year 2019	8,742	2,960
Amortized Cost Basis by Origination Year 2018	2,431	1,645
Amortized Cost Basis by Origination Year 2017	1,296	680
Amortized Cost Basis by Origination Year Prior to 2017	663	348
Total Loans	27,783	27,949
Consumer Portfolio [Member] | Auto [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	3,155	12,465
Amortized Cost Basis by Origination Year 2020	11,491	9,784
Amortized Cost Basis by Origination Year 2019	8,693	2,960
Amortized Cost Basis by Origination Year 2018	2,431	1,645
Amortized Cost Basis by Origination Year 2017	1,296	680
Amortized Cost Basis by Origination Year Prior to 2017	662	347
Total Loans	27,728	27,881
Consumer Portfolio [Member] | Auto [Member] | Non-performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		5
Amortized Cost Basis by Origination Year 2020	5	62
Amortized Cost Basis by Origination Year 2019	49
Amortized Cost Basis by Origination Year Prior to 2017	1	1
Total Loans	55	68
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,826	5,017
Amortized Cost Basis by Origination Year 2020	4,309	3,200
Amortized Cost Basis by Origination Year 2019	2,686	2,131
Amortized Cost Basis by Origination Year 2018	1,883	216
Amortized Cost Basis by Origination Year 2017	187	1,005
Amortized Cost Basis by Origination Year Prior to 2017	1,044	172
Amortized Cost - Revolving Loans	14,089	13,081
Total Loans	26,024	24,822
Consumer Portfolio [Member] | Other [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	1,826	5,000
Amortized Cost Basis by Origination Year 2020	4,293	3,200
Amortized Cost Basis by Origination Year 2019	2,686	2,131
Amortized Cost Basis by Origination Year 2018	1,883	214
Amortized Cost Basis by Origination Year 2017	185	1,005
Amortized Cost Basis by Origination Year Prior to 2017	1,044	172
Amortized Cost - Revolving Loans	14,089	13,081
Total Loans	26,006	24,803
Consumer Portfolio [Member] | Other [Member] | Non-performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021		17
Amortized Cost Basis by Origination Year 2020	16
Amortized Cost Basis by Origination Year 2018		2
Amortized Cost Basis by Origination Year 2017	2
Total Loans	18	19
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	356,506	366,968
Total Loans	356,506	366,968
Current	353,003	362,821
Total Past Due	3,503	4,147
Credit Cards Portfolio [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	172,816	188,681
Total Loans	172,816	188,681
Credit Cards Portfolio [Member] | Consumer [Member] | Transactor Accounts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	45,854	51,017
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, Less than 600 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,299	7,230
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 600-619 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,633	2,950
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 620-639 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	4,897	5,493
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 640-659 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	8,802	9,497
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 660-679 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	15,099	15,541
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 680-699 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	17,756	19,345
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 700-719 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	16,669	18,048
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 720-739 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	15,470	16,288
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 740-759 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	12,499	13,944
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 760-779 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	8,698	9,493
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 780-799 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	6,480	7,088
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 800-819 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	4,748	5,513
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 820-839 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,681	4,570
Credit Cards Portfolio [Member] | Consumer [Member] | Revolver Accounts | FICO Score, 840+ [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,231	2,664
Credit Cards Portfolio [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	183,690	178,287
Total Loans	183,690	178,287
Current	176,448	170,412
Total Past Due	7,242	7,875
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	628	33,626
Amortized Cost Basis by Origination Year 2020	31,742	11,673
Amortized Cost Basis by Origination Year 2019	10,325	7,659
Amortized Cost Basis by Origination Year 2018	6,553	3,398
Amortized Cost Basis by Origination Year 2017	2,915	1,323
Amortized Cost Basis by Origination Year Prior to 2017	2,146	1,357
Amortized Cost - Revolving Loans	125,798	131,859
Total Loans	180,107	190,895
Current	180,107	190,895
Leases and Other Portfolio [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		915
Amortized Cost Basis by Origination Year 2019	915
Amortized Cost Basis by Origination Year 2018		787
Amortized Cost Basis by Origination Year 2017	787
Amortized Cost Basis by Origination Year Prior to 2017	679	711
Total Loans	2,381	2,413
Leases and Other Portfolio [Member] | Leases [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,381	2,413
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2021	628	33,626
Amortized Cost Basis by Origination Year 2020	31,742	10,758
Amortized Cost Basis by Origination Year 2019	9,410	7,659
Amortized Cost Basis by Origination Year 2018	6,553	2,611
Amortized Cost Basis by Origination Year 2017	2,128	1,323
Amortized Cost Basis by Origination Year Prior to 2017	1,467	646
Amortized Cost - Revolving Loans	125,798	131,859
Total Loans	177,726	188,482
Leases and Other Portfolio [Member] | Other [Member] | Non-watch List-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	176,856	187,924
Leases and Other Portfolio [Member] | Other [Member] | Watch-Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	664	350
Leases and Other Portfolio [Member] | Other [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 206	$ 208

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Rollforward of Allowance for Credit/Loan Losses by Portfolio Segment (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 218,583,000	$ 101,788,000
Adjusted beginning balance		110,818,000
Charge-offs	(6,602,000)	(9,764,000)
Recoveries	1,292,000	2,092,000
Provision	(7,500,000)	88,000,000
Ending balance - ACL	205,773,000	191,146,000
Beginning balance - ACL on off-balance sheet	5,588,000	2,978,000
Provision	0	0
Ending balance - ACL on off-balance sheet	5,588,000	2,978,000
ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		9,030,000
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	122,700,000	63,313,000
Adjusted beginning balance		66,990,000
Charge-offs	(4,717,000)	(1,315,000)
Recoveries	126,000	1,476,000
Provision	1,459,000	55,381,000
Ending balance - ACL	119,568,000	122,532,000
Beginning balance - ACL on off-balance sheet	3,859,000	2,263,000
Ending balance - ACL on off-balance sheet	3,859,000	2,263,000
Commercial and Industrial Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		3,677,000
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	5,219,000	2,545,000
Adjusted beginning balance		2,693,000
Recoveries	115,000
Provision	(661,000)	856,000
Ending balance - ACL	4,673,000	3,549,000
Beginning balance - ACL on off-balance sheet	287,000	53,000
Ending balance - ACL on off-balance sheet	287,000	53,000
Specialty Lending Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		148,000
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	61,931,000	15,951,000
Adjusted beginning balance		16,877,000
Charge-offs		(6,062,000)
Recoveries	509,000	21,000
Provision	(2,397,000)	24,559,000
Ending balance - ACL	60,043,000	35,395,000
Beginning balance - ACL on off-balance sheet	447,000	257,000
Ending balance - ACL on off-balance sheet	447,000	257,000
Commercial Real Estate Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		926,000
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	6,586,000	2,623,000
Adjusted beginning balance		2,775,000
Charge-offs	(76,000)	(13,000)
Recoveries	59,000	14,000
Provision	(2,386,000)	1,401,000
Ending balance - ACL	4,183,000	4,177,000
Beginning balance - ACL on off-balance sheet	145,000	102,000
Ending balance - ACL on off-balance sheet	145,000	102,000
Consumer Real Estate Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		152,000
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	1,480,000	543,000
Adjusted beginning balance		574,000
Charge-offs	(109,000)	(248,000)
Recoveries	23,000	97,000
Provision	(791,000)	704,000
Ending balance - ACL	603,000	1,127,000
Beginning balance - ACL on off-balance sheet	381,000	22,000
Ending balance - ACL on off-balance sheet	381,000	22,000
Consumer Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		31,000
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	15,786,000	15,739,000
Adjusted beginning balance		16,653,000
Charge-offs	(1,692,000)	(2,126,000)
Recoveries	442,000	484,000
Provision	(2,392,000)	3,812,000
Ending balance - ACL	12,144,000	18,823,000
Credit Cards Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		914,000
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	2,271,000	1,074,000
Adjusted beginning balance		1,136,000
Charge-offs	(8,000)
Recoveries	18,000
Provision	(681,000)	1,172,000
Ending balance - ACL	1,600,000	2,308,000
Beginning balance - ACL on off-balance sheet	414,000	211,000
Ending balance - ACL on off-balance sheet	414,000	211,000
Leases and Other Portfolio [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		62,000
Total - Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	215,973,000	101,788,000
Adjusted beginning balance		107,698,000
Charge-offs	(6,602,000)	(9,764,000)
Recoveries	1,292,000	2,092,000
Provision	(7,849,000)	87,885,000
Ending balance - ACL	202,814,000	187,911,000
Beginning balance - ACL on off-balance sheet	5,533,000	2,908,000
Ending balance - ACL on off-balance sheet	5,533,000	2,908,000
Total - Loans [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		5,910,000
HTM [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	2,610,000
Adjusted beginning balance		3,120,000
Provision	349,000	115,000
Ending balance - ACL	2,959,000	3,235,000
Beginning balance - ACL on off-balance sheet	55,000	70,000
Ending balance - ACL on off-balance sheet	$ 55,000	70,000
HTM [Member] | ASU 2016-13 Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
ASU 2016-13 adjustment		$ 3,120,000

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance of Financial Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	$ 16,497,385	$ 16,103,651
Related Allowance for Credit Losses	205,773	218,583	$ 191,146	$ 101,788
Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	76,286	87,731
Related Allowance for Credit Losses	10,130	10,127
Amortized Cost of Collateral Dependent Assets with no related Allowance	33,680	41,609
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	7,169,405	7,062,074
Related Allowance for Credit Losses	119,568	122,700	122,532	63,313
Commercial and Industrial Portfolio [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	30,181	33,770
Related Allowance for Credit Losses	4,974	4,828
Amortized Cost of Collateral Dependent Assets with no related Allowance	11,060	9,916
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	7,013,292	6,884,168
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	27,993	29,684
Related Allowance for Credit Losses	4,974	4,828
Amortized Cost of Collateral Dependent Assets with no related Allowance	8,872	5,830
Commercial and Industrial Portfolio [Member] | Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	144,515	161,581
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	2,188	4,086
Amortized Cost of Collateral Dependent Assets with no related Allowance	2,188	4,086
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	520,776	511,300
Related Allowance for Credit Losses	4,673	5,219	3,549	2,545
Specialty Lending Portfolio [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	19,083	19,436
Related Allowance for Credit Losses	4,184	4,663
Amortized Cost of Collateral Dependent Assets with no related Allowance	1,674	242
Specialty Lending Portfolio [Member] | Asset-based Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	368,331	355,349
Specialty Lending Portfolio [Member] | Asset-based Lending [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	17,643	17,875
Related Allowance for Credit Losses	4,184	4,490
Amortized Cost of Collateral Dependent Assets with no related Allowance	234	242
Specialty Lending Portfolio [Member] | Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	152,445	155,951
Specialty Lending Portfolio [Member] | Factoring [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	1,440	1,561
Related Allowance for Credit Losses		173
Amortized Cost of Collateral Dependent Assets with no related Allowance	1,440
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	6,150,354	5,908,934
Related Allowance for Credit Losses	60,043	61,931	35,395	15,951
Commercial Real Estate Portfolio [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	21,493	28,587
Related Allowance for Credit Losses	972	582
Amortized Cost of Collateral Dependent Assets with no related Allowance	15,417	25,934
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	1,712,934	1,685,185
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	16,261	16,539
Related Allowance for Credit Losses	255
Amortized Cost of Collateral Dependent Assets with no related Allowance	10,869	16,539
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	2,691,313	2,472,535
Commercial Real Estate Portfolio [Member] | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	494,182	502,463
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	1,829	8,625
Amortized Cost of Collateral Dependent Assets with no related Allowance	1,829	8,625
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	387,748	449,855
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	39,046	30,275
Commercial Real Estate Portfolio [Member] | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	825,131	768,621
Commercial Real Estate Portfolio [Member] | General Construction [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	3,403	3,423
Related Allowance for Credit Losses	717	582
Amortized Cost of Collateral Dependent Assets with no related Allowance	2,719	770
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	1,999,740	1,945,494
Related Allowance for Credit Losses	4,183	6,586	4,177	2,623
Consumer Real Estate Portfolio [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	5,456	5,850
Related Allowance for Credit Losses		54
Amortized Cost of Collateral Dependent Assets with no related Allowance	5,456	5,429
Consumer Real Estate Portfolio [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	362,459	395,169
Consumer Real Estate Portfolio [Member] | HELOC [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	3,301	3,170
Amortized Cost of Collateral Dependent Assets with no related Allowance	3,301	3,170
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	1,616,801	1,528,494
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	1,974	2,468
Related Allowance for Credit Losses		54
Amortized Cost of Collateral Dependent Assets with no related Allowance	1,974	2,047
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	20,480	21,831
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	181	212
Amortized Cost of Collateral Dependent Assets with no related Allowance	181	212
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	120,497	117,986
Related Allowance for Credit Losses	603	1,480	1,127	543
Consumer Portfolio [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	73	88
Amortized Cost of Collateral Dependent Assets with no related Allowance	73	88
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	66,690	65,215
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	27,783	27,949
Consumer Portfolio [Member] | Auto [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	55	69
Amortized Cost of Collateral Dependent Assets with no related Allowance	55	69
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	26,024	24,822
Consumer Portfolio [Member] | Other [Member] | Collateral Dependent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	18	19
Amortized Cost of Collateral Dependent Assets with no related Allowance	18	19
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	180,107	190,895
Related Allowance for Credit Losses	1,600	2,271	$ 2,308	$ 1,074
Leases and Other Portfolio [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	2,381	2,413
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost of Collateral Dependent Assets	$ 177,726	$ 188,482

Securities - Securities Availab

Securities - Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 9,552,397	$ 8,887,734
Gross Unrealized Gains	296,763	413,665
Gross Unrealized Losses	(95,768)	(1,711)
Fair Value	9,753,392	9,299,688
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	49,137	29,911
Gross Unrealized Gains	687	829
Gross Unrealized Losses	(345)
Fair Value	49,479	30,740
U.S. Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	89,474	89,554
Gross Unrealized Gains	5,431	6,395
Fair Value	94,905	95,949
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,928,662	5,266,394
Gross Unrealized Gains	140,503	202,944
Gross Unrealized Losses	(79,559)	(1,157)
Fair Value	5,989,606	5,468,181
State and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,391,669	3,424,309
Gross Unrealized Gains	146,951	199,848
Gross Unrealized Losses	(15,679)	(538)
Fair Value	3,522,941	3,623,619
Corporates [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	93,455	77,566
Gross Unrealized Gains	3,191	3,649
Gross Unrealized Losses	(185)	(16)
Fair Value	$ 96,461	$ 81,199

Securities - Summary of Contrac

Securities - Summary of Contractual Maturity Information for Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Due in 1 year or less, Amortized Cost	$ 227,526
Due after 1 year through 5 years, Amortized Cost	539,250
Due after 5 years through 10 years, Amortized Cost	686,132
Due after 10 years, Amortized Cost	2,170,827
Total, Amortized Cost	3,623,735
Mortgage-backed securities, Amortized Cost	5,928,662
Amortized Cost	9,552,397	$ 8,887,734
Due in 1 year or less, Fair Value	228,849
Due after 1 year through 5 years, Fair Value	556,353
Due after 5 years through 10 years, Fair Value	707,146
Due after 10 years, Fair Value	2,271,438
Total, Fair Value	3,763,786
Mortgage-backed securities, Fair Value	5,989,606
Total securities available for sale, Fair Value	$ 9,753,392	$ 9,299,688

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Trading Securities and Other Trading Assets [Line Items]
Proceeds from sales of securities available for sale	$ 129,128,000	$ 84,439,000
Gross realized gains from securities	2,720,000	1,227,000
Gross realized losses from securities	0	0
Accrued interest on securities available for sale	33,600,000		$ 42,600,000
Sales of securities held to maturity	0	0
Accrued interest on securities held to maturity	6,700,000		5,300,000
Unrealized gain (loss) on trading securities	(40,000)	150,000
Securities sold not yet purchased		$ 2,000,000	2,200,000
Collateral Dependent Assets [Member] | U.S. Government and Other Public Deposit [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Pledged securities for deposits	7,300,000,000		7,800,000,000
Collateral Dependent Assets [Member] | Federal Reserve Discount Window [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Pledged securities for deposits	$ 214,900,000		$ 371,500,000

Securities - Gross Unrealized L

Securities - Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale (Detail) $ in Thousands	Mar. 31, 2021USD ($)Security	Dec. 31, 2020USD ($)Security
Gain (Loss) on Investments [Line Items]
Less than 12 months, Count | Security	716	44
Less than 12 months, Fair Value	$ 3,476,682	$ 235,222
Less than 12 months, Unrealized Losses	$ (95,566)	$ (1,452)
12 months or more, Count | Security	4	6
12 months or more, Fair Value	$ 2,531	$ 2,833
12 months or more, Unrealized Losses	$ (202)	$ (259)
Total Count | Security	720	50
Total Fair Value	$ 3,479,213	$ 238,055
Total Unrealized Losses	$ (95,768)	$ (1,711)
U.S. Treasury [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Count | Security	3
Less than 12 months, Fair Value	$ 14,161
Less than 12 months, Unrealized Losses	$ (345)
Total Count | Security	3
Total Fair Value	$ 14,161
Total Unrealized Losses	$ (345)
Mortgage-backed [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Count | Security	168	16
Less than 12 months, Fair Value	$ 2,871,680	$ 174,234
Less than 12 months, Unrealized Losses	$ (79,559)	$ (1,157)
Total Count | Security	168	16
Total Fair Value	$ 2,871,680	$ 174,234
Total Unrealized Losses	$ (79,559)	$ (1,157)
State and political subdivisions [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Count | Security	519	24
Less than 12 months, Fair Value	$ 565,317	$ 55,653
Less than 12 months, Unrealized Losses	$ (15,477)	$ (279)
12 months or more, Count | Security	4	6
12 months or more, Fair Value	$ 2,531	$ 2,833
12 months or more, Unrealized Losses	$ (202)	$ (259)
Total Count | Security	523	30
Total Fair Value	$ 567,848	$ 58,486
Total Unrealized Losses	$ (15,679)	$ (538)
Corporates [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Count | Security	26	4
Less than 12 months, Fair Value	$ 25,524	$ 5,335
Less than 12 months, Unrealized Losses	$ (185)	$ (16)
Total Count | Security	26	4
Total Fair Value	$ 25,524	$ 5,335
Total Unrealized Losses	$ (185)	$ (16)

Securities - Contractual Maturi

Securities - Contractual Maturity Information for Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Due in 1 year or less, Amortized Cost	$ 1,372	$ 4,907
Due after 1 year through 5 years, Amortized Cost	121,217	123,643
Due after 5 years through 10 years, Amortized Cost	416,437	423,759
Due after 10 years, Amortized Cost	503,644	462,305
Total state and political subdivisions, Amortized Cost	1,042,670	1,014,614
Allowance for credit losses	(2,959)	(2,610)
Total state and political subdivisions, net of allowance for credit losses	1,039,711	1,012,004
Due in 1 year or less, Gross Unrealized Gains	15	29
Due after 1 year through 5 years, Gross Unrealized Gains	1,703	3,402
Due after 5 years through 10 years, Gross Unrealized Gains	4,020	12,845
Due after 10 years, Gross Unrealized Gains	1,821	13,447
Total state and political subdivisions, Gross Unrealized Gains	7,559	29,723
Due after 1 year through 5 years, Gross Unrealized Losses	(137)	(144)
Due after 5 years through 10 years, Gross Unrealized Losses	(6,858)	(1,566)
Due after 10 years, Gross Unrealized Losses	(31,105)	(13,183)
Total state and political subdivisions, Gross Unrealized Losses	(38,100)	(14,893)
Due in 1 year or less, Fair Value	1,387	4,936
Due after 1 year through 5 years, Fair Value	122,783	126,901
Due after 5 years through 10 years, Fair Value	413,599	435,038
Due after 10 years, Fair Value	474,360	462,569
Total state and political subdivisions, Fair Value	$ 1,012,129	$ 1,029,444

Securities - Gross Unrealized_2

Securities - Gross Unrealized Losses and Fair Value of Investment Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Held To Maturity Securities [Line Items]
Less than 12 months, Fair Value	$ 476,985	$ 132,271
Less than 12 months,Unrealized Losses	(21,027)	(4,591)
12 months or more, Fair Value	104,720	109,712
12 months or more, Unrealized Losses	(17,073)	(10,302)
Total Fair Value	581,705	241,983
Total Unrealized Losses	(38,100)	(14,893)
State and political subdivisions [Member]
Schedule Of Held To Maturity Securities [Line Items]
Less than 12 months, Fair Value	476,985	132,271
Less than 12 months,Unrealized Losses	(21,027)	(4,591)
12 months or more, Fair Value	104,720	109,712
12 months or more, Unrealized Losses	(17,073)	(10,302)
Total Fair Value	581,705	241,983
Total Unrealized Losses	$ (38,100)	$ (14,893)

Securities - Schedule of Amorti

Securities - Schedule of Amortized Cost Basis by Credit Rating of Held to Maturity Investment (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	$ 1,042,670	$ 1,014,614
Competitive [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	953,612	925,289
Utilities [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	89,058	89,325
Credit Rating, A [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	388,555	396,522
Credit Rating, A [Member] | Competitive [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	332,322	340,290
Credit Rating, A [Member] | Utilities [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	56,233	56,232
Credit Rating, BBB [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	629,082	591,879
Credit Rating, BBB [Member] | Competitive [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	596,257	558,786
Credit Rating, BBB [Member] | Utilities [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	32,825	33,093
Credit Rating, BB [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	17,079	18,078
Credit Rating, BB [Member] | Competitive [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	17,079	18,078
Credit Rating, CCC-C [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	7,954	8,135
Credit Rating, CCC-C [Member] | Competitive [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Held to maturity securities	$ 7,954	$ 8,135

Securities - Schedule of Other

Securities - Schedule of Other Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Other Securities [Line Items]
Other securities	$ 298,209	$ 296,053
FRB and FHLB stock [Member]
Schedule of Other Securities [Line Items]
Other securities	36,222	33,222
Equity Securities With Readily Determinable Fair Values [Member]
Schedule of Other Securities [Line Items]
Other securities	133,979	134,197
Equity Securities Without Readily Determinable Fair Values [Member]
Schedule of Other Securities [Line Items]
Other securities	$ 128,008	$ 128,634

Securities - Schedule of Compon

Securities - Schedule of Components of Investment Securities Gains, Net (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Available-for-sale debt securities:
Gains realized on sales	$ 2,720	$ 1,227
Equity securities with readily determinable fair values:
Fair value adjustments, net	(13,918)
Equity securities without readily determinable fair values:
Fair value adjustments, net	2,862	2,293
Total investment securities (losses) gains, net	$ (8,336)	$ 3,520

Goodwill and Other Intangible_2

Goodwill and Other Intangibles - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 174,518	$ 180,867	$ 180,867
Sale of component of business segment	(6,349)
Commercial Banking [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill	59,419	59,419	59,419
Institutional Banking [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill	51,332	51,332	51,332
Personal Banking [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill	63,767	$ 70,116	$ 70,116
Sale of component of business segment	$ (6,349)

Goodwill and Other Intangible_3

Goodwill and Other Intangibles - Changes In Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 121,226	$ 139,987
Accumulated amortization	103,433	118,931
Net carrying amount	17,793	21,056
Core Deposit Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	50,059	50,059
Accumulated amortization	49,056	48,746
Net carrying amount	1,003	1,313
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	71,167	89,928
Accumulated amortization	54,377	70,185
Net carrying amount	$ 16,790	$ 19,743

Goodwill and Other Intangible_4

Goodwill and Other Intangibles - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Disposition of goodwill	$ 6.3
Unamortized customer relationship intangibles	$ 1.9

Goodwill and Other Intangible_5

Goodwill and Other Intangibles - Aggregate Amortization Expense Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 1,380	$ 1,734

Goodwill and Other Intangible_6

Goodwill and Other Intangibles - Estimated Amortization Expense of Intangible Assets (Detail) $ in Thousands	Mar. 31, 2021USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
For the nine months ending December 31, 2021	$ 3,377
For the year ending December 31, 2022	3,920
For the year ending December 31, 2023	3,323
For the year ending December 31, 2024	2,704
For the year ending December 31, 2025	$ 2,608

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Remaining Contractual Maturities Of Repurchase Agreements (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 2,542,517	$ 2,249,861
Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	2,058,336	1,759,559
30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	481,430	489,302
Over 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	2,751	1,000
U.S. Treasury [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	18,702	2,440
U.S. Treasury [Member] | Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	18,702	2,440
U.S. Agencies [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	2,523,815	2,247,421
U.S. Agencies [Member] | Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	2,039,634	1,757,119
U.S. Agencies [Member] | 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	481,430	489,302
U.S. Agencies [Member] | Over 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 2,751	$ 1,000

Business Segment Reporting - Ad

Business Segment Reporting - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2021Segment
Segment Reporting [Abstract]
Number of reportable segments	3

Business Segment Reporting - Sc

Business Segment Reporting - Schedule of Segment Financial Results (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net interest income	$ 194,115	$ 173,941
Provision for credit losses	(7,500)	88,000
Noninterest income	108,897	98,424
Noninterest expense	200,946	188,619
Income (loss) before income taxes	109,566	(4,254)
Income tax (benefit) expense	16,923	(815)
NET INCOME (LOSS)	92,643	(3,439)
Average assets	33,052,000	26,040,000
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	133,032	106,948
Provision for credit losses	(8,182)	82,220
Noninterest income	7,385	11,240
Noninterest expense	65,645	59,043
Income (loss) before income taxes	82,954	(23,075)
Income tax (benefit) expense	12,813	(4,421)
NET INCOME (LOSS)	70,141	(18,654)
Average assets	14,204,000	11,601,000
Institutional Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	22,138	33,036
Provision for credit losses	220	275
Noninterest income	68,421	61,952
Noninterest expense	71,282	68,453
Income (loss) before income taxes	19,057	26,260
Income tax (benefit) expense	2,943	5,032
NET INCOME (LOSS)	16,114	21,228
Average assets	11,603,000	9,011,000
Personal Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	38,945	33,957
Provision for credit losses	462	5,505
Noninterest income	33,091	25,232
Noninterest expense	64,019	61,123
Income (loss) before income taxes	7,555	(7,439)
Income tax (benefit) expense	1,167	(1,426)
NET INCOME (LOSS)	6,388	(6,013)
Average assets	$ 7,245,000	$ 5,428,000

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) - ASC 606 [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Total receivables of revenue recognized	$ 69.7		$ 62.1
Bankcard Fees [Member]
Disaggregation Of Revenue [Line Items]
Bankcard expenses	$ 7.8	$ 8.4

Revenue Recognition - Summary o

Revenue Recognition - Summary of Disaggregation of Revenue According to Revenue Stream and Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Revenue (Expense) out of Scope of ASC 606	$ 4,509	$ (10,642)
Noninterest income	108,897	98,424
Trust and Securities Processing [Member]
Disaggregation Of Revenue [Line Items]
Noninterest income	54,834	47,000
Trading and Investment Banking [Member]
Disaggregation Of Revenue [Line Items]
Revenue (Expense) out of Scope of ASC 606	9,055	1,067
Noninterest income	9,356	1,723
Service Charges On Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue (Expense) out of Scope of ASC 606	70	43
Noninterest income	21,976	25,081
Insurance Fees and Commissions [Member]
Disaggregation Of Revenue [Line Items]
Noninterest income	420	259
Brokerage Fees [Member]
Disaggregation Of Revenue [Line Items]
Noninterest income	3,334	9,860
Bankcard Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue (Expense) out of Scope of ASC 606	(7,616)	(8,157)
Noninterest income	14,673	16,545
Investment Securities Gains (Losses), Net [Member]
Disaggregation Of Revenue [Line Items]
Revenue (Expense) out of Scope of ASC 606	(8,336)	3,520
Noninterest income	(8,336)	3,520
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue (Expense) out of Scope of ASC 606	11,336	(7,115)
Noninterest income	12,640	(5,564)
Commercial Banking [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	20,192	22,339
Noninterest income	7,385	11,240
Commercial Banking [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	7,528	6,892
Commercial Banking [Member] | Brokerage Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	64	59
Commercial Banking [Member] | Bankcard Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	12,369	14,988
Commercial Banking [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	231	400
Institutional Banking [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	56,899	60,277
Noninterest income	68,421	61,952
Institutional Banking [Member] | Trust and Securities Processing [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	37,485	31,262
Institutional Banking [Member] | Trading and Investment Banking [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	301	656
Institutional Banking [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	12,577	15,607
Institutional Banking [Member] | Brokerage Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	1,319	7,590
Institutional Banking [Member] | Bankcard Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	4,813	4,724
Institutional Banking [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	404	438
Personal Banking [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	27,297	26,450
Noninterest income	33,091	25,232
Personal Banking [Member] | Trust and Securities Processing [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	17,349	15,738
Personal Banking [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	1,801	2,539
Personal Banking [Member] | Insurance Fees and Commissions [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	420	259
Personal Banking [Member] | Brokerage Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	1,951	2,211
Personal Banking [Member] | Bankcard Fees [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	5,107	4,990
Personal Banking [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue Scope of ASC 606	$ 669	$ 713

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees - Notional Amount of Off-Balance Sheet Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Commitments to extend credit for loans (excluding credit card loans) [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	$ 9,353,712	$ 8,851,333
Commitments to extend credit under credit card loans [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	3,537,324	3,472,339
Commercial letters of credit [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	4,852	3,160
Standby letters of credit [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	331,051	346,617
Forward contracts [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	53,065	51,273
Spot foreign exchange contracts [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	$ 3,923	$ 680

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Line Items]
ACL for off-balance sheet credit exposures	$ 5,588,000	$ 2,978,000	$ 5,588,000	$ 2,978,000
Provision for off-balance sheet credit exposures	0	$ 0
Accrued Expenses and Taxes [Member]
Commitments and Contingencies Disclosure [Line Items]
ACL for off-balance sheet credit exposures	$ 5,600,000		$ 5,600,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Summary of Fair Value of Derivative Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 65,539	$ 103,554
Derivative Liabilities, Fair Value	17,379	9,375
Derivatives not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	65,538	103,506
Derivative Liabilities, Fair Value	16,911	9,375
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	1	$ 48
Derivative Liabilities, Fair Value	$ 468

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2021USD ($)Derivative	Dec. 31, 2020USD ($)Derivative	Aug. 28, 2020USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Termination value of derivatives in net liability position	$ 5,900,000
Collateral posted for derivative instruments	$ 10,600,000
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate hedging exposure to variability in future cash flows for forecasted transactions, maximum period	15 years 6 months
Interest Rate Swap [Member] | Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 508,200,000	$ 5,000,000
Number of interest rate swaps | Derivative	5	1
Interest Rate Swap [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 51,500,000	$ 51,500,000
Number of interest rate swaps | Derivative	2	2
Interest Rate Swap [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI to interest	$ 1,300,000
Interest Rate Swap [Member] | Derivatives not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 2,500,000,000	$ 2,500,000,000
Number of interest rate swaps | Derivative	180	176
Interest Rate Floor [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount			$ 750,000,000
Net asset fair value			$ 34,100,000
Unrealized gain on terminated interest rate floor remaining in AOCI, pre tax	$ 15,900,000	$ 17,000,000
Unrealized gain on terminated interest rate floor remaining in AOCI, net of tax	$ 12,000,000	$ 12,900,000
Unrealized gain reclassification to earnings, remaining term	3 years 4 months 24 days
Interest rate floor termination date	Aug. 28, 2020
Interest Rate Floor [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Reduction To Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI to interest	$ 4,700,000

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Summary of Amount of Gain (Loss) Recognized in Interest Income and Other Non-interest Expense in Consolidated Statements of Income Related to Derivative Assets and Liabilities (Detail) - Interest Rate Swap [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivatives not Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized	$ 489	$ (259)
Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized	77	(1)
Derivatives Designated as Hedging Instruments [Member] | Fair value adjustments on derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized	9,328	(203)
Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized	$ (9,251)	$ 202

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Summary of Effect of Hedges on AOCI in Consolidated Statements of Comprehensive Income Related to Company's Derivative Assets and Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ 6,503	$ 14,525
Gain (Loss) Reclassified from AOCI into Earnings	842	(768)
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	6,503	14,525
Gain (Loss) Recognized in OCI Included Component	6,503	18,887
Gain (Loss) Recognized in OCI Included Component		(4,362)
Gain (Loss) Reclassified from AOCI into Earnings	842	(768)
Gain (Loss) Reclassified from AOCI into Earnings Included Component	1,397	(132)
Loss Reclassified from AOCI into Earnings Excluded Component	(555)	(636)
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Floor [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative		24,934
Gain (Loss) Recognized in OCI Included Component		29,296
Gain (Loss) Recognized in OCI Included Component		(4,362)
Gain (Loss) Reclassified from AOCI into Earnings	1,166	(636)
Gain (Loss) Reclassified from AOCI into Earnings Included Component	1,721
Loss Reclassified from AOCI into Earnings Excluded Component	(555)	(636)
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	6,503	(10,409)
Gain (Loss) Recognized in OCI Included Component	6,503	(10,409)
Gain (Loss) Reclassified from AOCI into Earnings	(324)	(132)
Gain (Loss) Reclassified from AOCI into Earnings Included Component	$ (324)	$ (132)

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 29,099	$ 35,020
Available for sale securities	9,753,392	9,299,688
Derivative Assets, Fair Value	65,539	103,554
Derivative Liabilities, Fair Value	17,379	9,375
Securities sold not yet purchased		2,200	$ 2,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	7,870	14,903
Available for sale securities	145,940	111,939
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	21,229	20,117
Available for sale securities	9,607,452	9,187,749
U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	49,479	30,740
U.S. Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	94,905	95,949
Mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	5,989,606	5,468,181
State and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	3,522,941	3,623,619
Corporates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	96,461	81,199
Fair Value Measurement, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	29,099	35,020
Available for sale securities	9,753,392	9,299,688
Equity securities with readily determinable fair values	133,979	134,197
Company-owned life insurance	64,607	63,575
Bank-owned life insurance	389,806	387,513
Derivative Assets, Fair Value	65,539	103,554
Total	10,436,422	10,023,547
Derivative Liabilities, Fair Value	17,379	9,375
Securities sold not yet purchased	2,001	2,177
Total	19,380	11,552
Fair Value Measurement, Recurring [Member] | Trading - other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	841	13,541
Fair Value Measurement, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	7,870	14,903
Available for sale securities	145,940	111,939
Equity securities with readily determinable fair values	133,979	134,197
Total	287,789	261,039
Fair Value Measurement, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Trading - other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	841	13,541
Fair Value Measurement, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	21,229	20,117
Available for sale securities	9,607,452	9,187,749
Company-owned life insurance	64,607	63,575
Bank-owned life insurance	389,806	387,513
Derivative Assets, Fair Value	65,539	103,554
Total	10,148,633	9,762,508
Derivative Liabilities, Fair Value	17,379	9,375
Securities sold not yet purchased	2,001	2,177
Total	19,380	11,552
Fair Value Measurement, Recurring [Member] | U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3,896	651
Available for sale securities	49,479	30,740
Fair Value Measurement, Recurring [Member] | U.S. Treasury [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3,896	651
Available for sale securities	49,479	30,740
Fair Value Measurement, Recurring [Member] | U.S. Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3,933	1,568
Available for sale securities	94,905	95,949
Fair Value Measurement, Recurring [Member] | U.S. Agencies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3,933	1,568
Available for sale securities	94,905	95,949
Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		4
Available for sale securities	5,989,606	5,468,181
Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		4
Available for sale securities	5,989,606	5,468,181
Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	17,296	18,545
Available for sale securities	3,522,941	3,623,619
Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	17,296	18,545
Available for sale securities	3,522,941	3,623,619
Fair Value Measurement, Recurring [Member] | Corporates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3,133	711
Available for sale securities	96,461	81,199
Fair Value Measurement, Recurring [Member] | Corporates [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3,133	711
Available for sale securities	$ 96,461	$ 81,199

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value, Measurements, Non-Recurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 32,476	$ 38,793
Total Losses Recognized	(3)	(10,327)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	32,476	38,793
Collateral dependent assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	32,476	35,995
Total Losses Recognized	(3)	(9,389)
Collateral dependent assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 32,476	35,995
Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value		2,798
Total Losses Recognized		(938)
Other real estate owned [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value		$ 2,798

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	$ 5,877,806	$ 5,191,015
Securities available for sale	9,753,392	9,299,688
Securities held to maturity (exclusive of allowance for credit losses)	1,042,670	1,014,614
Trading securities	29,099	35,020
Other securities	298,209	296,053
Loans (exclusive of allowance for credit losses)	16,507,660	16,110,359
Derivatives	65,539	103,554
Demand and savings deposits	27,616,227	26,175,156
Time deposits	664,565	876,095
Other borrowings	2,759,818	2,315,497
Long-term debt	270,074	269,595
Derivatives	17,379	9,375
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	5,877,806	5,191,015
Securities available for sale	9,753,392	9,299,688
Securities held to maturity (exclusive of allowance for credit losses)	1,012,129	1,029,444
Trading securities	29,099	35,020
Other securities	298,299	296,053
Loans (exclusive of allowance for credit losses)	16,820,506	16,413,132
Derivatives	65,539	103,554
Demand and savings deposits	27,616,227	26,175,156
Time deposits	664,565	879,841
Other borrowings	2,759,818	2,315,497
Long-term debt	293,386	299,858
Derivatives	17,379	9,375
Commitments to extend credit for loans	1,583	6,405
Commercial letters of credit	76	150
Standby letters of credit	777	3,365
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	4,247,993	3,540,680
Securities available for sale	145,940	111,939
Trading securities	7,870	14,903
Other securities	133,979	134,197
Demand and savings deposits	27,616,227	26,175,156
Other borrowings	217,301	65,636
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	1,629,813	1,650,335
Securities available for sale	9,607,452	9,187,749
Securities held to maturity (exclusive of allowance for credit losses)	1,012,129	1,029,444
Trading securities	21,229	20,117
Other securities	164,320	161,856
Loans (exclusive of allowance for credit losses)	16,820,506	16,413,132
Derivatives	65,539	103,554
Time deposits	664,565	879,841
Other borrowings	2,542,517	2,249,861
Long-term debt	293,386	299,858
Derivatives	$ 17,379	$ 9,375