Stifel Financial (SF) 10-Q 6 May 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Registrant Name	STIFEL FINANCIAL CORP
Entity Central Index Key	0000720672
Current Fiscal Year End Date	--12-31
Entity File Number	001-09305
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	43-1273600
Entity Address, Address Line One	501 N. Broadway
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63102-2188
City Area Code	314
Local Phone Number	342-2000
Document Quarterly Report	true
Document Transition Report	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Common Stock [Member]
Document Information [Line Items]
Trading Symbol	SF
Title of 12(b) Security	Common Stock, $0.15 par value per share
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		105,090,273
Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series A [Member]
Document Information [Line Items]
Trading Symbol	SF-PA
Title of 12(b) Security	Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series A
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		6,000
Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series B [Member]
Document Information [Line Items]
Trading Symbol	SF-PB
Title of 12(b) Security	Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series B
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		6,400
Depository Shares, each representing 1/1,000th interest in a share of 6.125% Non-Cumulative Preferred Stock, Series C [Member]
Document Information [Line Items]
Trading Symbol	SF-PC
Title of 12(b) Security	Depository Shares, each representing 1/1,000th interest in a share of 6.125% Non-Cumulative Preferred Stock, Series C
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		9,000
Senior notes 5.20% due 2047 [Member]
Document Information [Line Items]
Trading Symbol	SFB
Title of 12(b) Security	5.20% Senior Notes due 2047
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		225,000,000

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 1,425,511	$ 2,279,274
Cash segregated for regulatory purposes	95,074	172,932
Receivables:
Brokerage clients, net	1,202,601	936,500
Brokers, dealers, and clearing organizations	562,432	549,492
Securities purchased under agreements to resell	470,025	217,930
Financial instruments owned, at fair value	981,282	694,028
Available-for-sale securities, at fair value	2,190,128	2,230,297
Held-to-maturity securities, at amortized cost	4,761,401	4,117,384
Loans:
Held for investment, net	12,091,713	11,006,760
Held for sale, at lower of cost or market	330,521	551,248
Investments, at fair value	119,545	113,862
Fixed assets, net	165,707	167,915
Operating lease right-of-use assets, net	774,837	793,181
Goodwill	1,182,313	1,181,998
Intangible assets, net	136,776	140,984
Loans and advances to financial advisors and other employees, net	600,622	596,993
Deferred tax assets, net	95,015	136,477
Other assets	956,078	716,999
Total assets	28,141,581	26,604,254
Payables:
Brokerage clients	885,659	1,063,937
Brokers, dealers, and clearing organizations	308,937	177,937
Drafts	78,146	117,737
Securities sold under agreements to repurchase	208,228	190,955
Bank deposits	18,715,133	17,396,497
Financial instruments sold, but not yet purchased, at fair value	644,762	437,978
Accrued compensation	399,049	638,298
Accounts payable and accrued expenses	1,410,123	1,169,740
Senior notes	1,112,672	1,112,409
Debentures to Stifel Financial Capital Trusts	60,000	60,000
Total liabilities	23,822,709	22,365,488
Stifel Financial Corp. shareholders' equity:
Preferred stock - $1 par value; authorized 3,000,000 shares; issued 21,400 shares	535,000	535,000
Common stock - $0.15 par value; authorized 194,000,000 shares; issued 111,661,660 and 111,661,621 shares, respectively	16,749	16,749
Additional paid-in-capital	1,814,616	1,888,982
Retained earnings	2,202,701	2,078,135
Accumulated other comprehensive income	7,305	27,639
Treasury stock, at cost, 6,446,242 and 8,512,584 shares, respectively	(257,499)	(307,739)
Total equity	4,318,872	4,238,766
Total liabilities and equity	$ 28,141,581	$ 26,604,254

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - $ / shares	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	21,400	21,400
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	194,000,000	194,000,000
Common stock, shares issued	111,661,660	111,661,621
Treasury stock, shares	6,446,242	8,512,584

Consolidated Statements Of Oper

Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues:
Revenue from contracts with customers		$ 847,931	$ 633,108
Principal transactions		165,006	138,666
Interest		127,540	161,177
Other income		25,634	9,207
Total revenues		1,149,229	937,391
Interest expense		14,440	24,357
Net revenues	[1]	1,134,789	913,034
Non-interest expenses:
Compensation and benefits		697,914	577,179
Occupancy and equipment rental		72,032	66,073
Communications and office supplies		41,825	41,124
Commissions and floor brokerage		15,703	14,842
Provision for credit losses		(5,252)	16,068
Other operating expenses		84,675	82,642
Total non-interest expenses		906,897	797,928
Income from operations before income tax expense		227,892	115,106
Provision for income taxes		54,877	28,517
Net income		173,015	86,589
Preferred dividends		8,289	4,844
Net income available to common shareholders		$ 164,726	$ 81,745
Earnings per common share:
Basic		$ 1.53	$ 0.76
Diluted		1.40	0.71
Cash dividends declared per common share		$ 0.15	$ 0.11
Weighted-average number of common shares outstanding:
Basic		107,746	106,929
Diluted		117,875	114,929
Commissions [Member]
Revenues:
Revenue from contracts with customers		$ 213,614	$ 211,098
Investment Banking [Member]
Revenues:
Revenue from contracts with customers		339,288	179,468
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers		$ 278,147	$ 237,775
[1]	No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2021 or 2020.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 173,015	$ 86,589
Other comprehensive income/(loss), net of tax
Changes in unrealized losses on available-for-sale securities	[1]	(22,670)	(73,227)
Changes in unrealized gains/(losses) on cash flow hedging instruments	[2]		(1,706)
Foreign currency translation adjustment		2,336	(9,822)
Total other comprehensive loss, net of tax		(20,334)	(84,755)
Comprehensive income		$ 152,681	$ 1,834
[1]	There were no reclassifications to earnings for the three months ended March 31, 2021. Net of reclassifications to earnings of realized losses of $0.5 million during the three months ended March 31, 2020.
[2]	Reclassifications to earnings were immaterial for the three months ended March 31, 2021. Net of reclassifications to earnings of losses of $0.3 million for the three months ended March 31, 2020.

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Other comprehensive income/(loss), tax	$ 6.4	$ 27.9
Reclassifications to earnings of realized losses on available-for-sale securities	$ 0	(0.5)
Reclassifications to earnings of gains (loss) on cash flow hedging instruments		$ 0.3

Consolidated Statements Of Shar

Consolidated Statements Of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, AdjustmentRevision of Prior Period, Adjustment	AOCI Attributable to Parent	Treasury Stock at Cost [Member]	Parent [Member]	Non-controlling Interests
Balance, beginning of period at Dec. 31, 2019			$ 310,000	$ 16,749	$ 1,903,703	$ 1,715,704	$ (7,772)	$ (11,705)	$ (319,660)		$ 54,999
Common stock repurchased	$ (56,200)								(56,160)
Unit amortization, net of forfeitures					33,799
Distributions under employee plans					(105,570)	(46,717)			54,579
Net income	86,589					86,589
Dividends declared, Common						(14,916)
Dividends declared, Preferred						(4,844)
Dividends declared to equity-award holders					350
Unrealized losses on securities, net of tax	(73,227)	[1]						(73,227)
Unrealized gains/(losses) on cash flow hedging activities, net of tax								(1,706)
Foreign currency translation adjustment, net of tax	(9,822)							(9,822)
Other					85	867
Deconsolidation of non-controlling interest											$ (54,999)
Balance, end of period at Mar. 31, 2020	3,470,326		310,000	16,749	1,832,367	1,728,911		(96,460)	(321,241)	$ 3,470,326
Balance, beginning of period at Dec. 31, 2020	4,238,766		535,000	16,749	1,888,982	2,078,135		27,639	(307,739)
Common stock repurchased	(12,700)								(12,038)
Unit amortization, net of forfeitures					34,811
Distributions under employee plans					(109,224)	(21,587)			62,278
Net income	173,015					173,015
Dividends declared, Common						(18,470)
Dividends declared, Preferred						(8,289)
Unrealized losses on securities, net of tax	(22,670)	[1]						(22,670)
Foreign currency translation adjustment, net of tax	2,336							2,336
Other					47	(103)
Balance, end of period at Mar. 31, 2021	$ 4,318,872		$ 535,000	$ 16,749	$ 1,814,616	$ 2,202,701		$ 7,305	$ (257,499)	$ 4,318,872
[1]	There were no reclassifications to earnings for the three months ended March 31, 2021. Net of reclassifications to earnings of realized losses of $0.5 million during the three months ended March 31, 2020.

Consolidated Statements Of Sh_2

Consolidated Statements Of Shareholders' Equity (Parenthetical) (Unaudited) - $ / shares	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Statement Of Stockholders Equity [Abstract]
Preferred stock, par value	$ 1	$ 1	$ 1
Common stock, par value	$ 0.15	$ 0.15	$ 0.15

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows From Operating Activities:
Net income	$ 173,015	$ 86,589
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	10,907	9,378
Amortization of loans and advances to financial advisors and other employees	26,961	27,729
Amortization of premium on investment portfolio	4,498	6,210
Provision for credit losses and allowance for loans and advances to financial advisors and other employees	(5,252)	19,253
Amortization of intangible assets	4,268	5,032
Deferred income taxes	47,253	17,098
Stock-based compensation	32,029	30,762
(Gains)/losses on sale of investments	(4,284)	31,043
Other, net	26,582	(5,464)
Receivables:
Brokerage clients	(266,101)	(117,920)
Brokers, dealers, and clearing organizations	(12,940)	(76,604)
Securities purchased under agreements to resell	(252,095)	(73,960)
Financial instruments owned, including those pledged	(287,254)	40,421
Loans originated as held for sale	(754,317)	(474,824)
Proceeds from mortgages held for sale	952,053	506,936
Loans and advances to financial advisors and other employees	(30,700)	(40,554)
Other assets	(238,950)	(51,427)
Increase/(decrease) in operating liabilities, net of liabilities assumed:
Brokerage clients	(178,278)	205,936
Brokers, dealers, and clearing organizations	44,423	106,196
Drafts	(39,591)	(29,019)
Financial instruments sold, but not yet purchased	206,784	5,943
Other liabilities and accrued expenses	20,804	(234,445)
Net cash used in operating activities	(520,185)	(5,691)
Cash Flows From Investing Activities:
Principal paydowns, calls, and maturities of available-for-sale securities	128,302	385,131
Calls and principal paydowns of held-to-maturity securities	480,635	155,184
Sale or maturity of investments	1,108	2,252
Disposition of business		37,000
Increase in loans held for investment, net	(1,079,671)	(593,296)
Payments for:
Purchase of fixed assets	(11,245)	(601,660)
Purchase of available-for-sale securities	(427,596)	(384,700)
Purchase of held-to-maturity securities	(811,473)	(53,002)
Purchase of investments	(2,675)	(12,900)
Acquisitions, net of cash received	(315)
Net cash used in investing activities	(1,722,930)	(1,065,991)
Cash Flows From Financing Activities:
Proceeds from borrowings, net		198,000
Payment of contingent consideration	(10,480)	(2,208)
Increase in securities sold under agreements to repurchase	17,273	83,894
Increase in bank deposits, net	1,318,636	1,548,352
Increase/(decrease) in securities loaned	86,577	(272,560)
Tax payments related to shares withheld for stock-based compensation plans	(66,839)	(68,497)
Repurchase of common stock	(12,038)	(56,160)
Cash dividends on preferred stock	(8,289)	(4,844)
Cash dividends paid to common stock and equity-award holders	(15,682)	(11,472)
Cash paid to employees upon settlement of equity awards		(27,101)
Net cash provided by financing activities	1,309,158	1,387,404
Effect of exchange rate changes on cash	2,336	(9,822)
(Decrease)/increase in cash, cash equivalents, and cash segregated for regulatory purposes	(931,621)	305,900
Cash, cash equivalents, and cash segregated for regulatory purposes at beginning of period	2,452,206	1,273,970
Cash, cash equivalents, and cash segregated for regulatory purposes at end of period	1,520,585	1,579,870
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net of refunds	8,394	15,423
Cash paid for interest	15,610	28,707
Noncash financing activities:
Unit grants, net of forfeitures	$ 128,639	$ 106,522

Cash, Cash Equivalents, and Cas

Cash, Cash Equivalents, and Cash Restricted for Regulatory Purposes for Periods Presented in Consolidated Statement of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 1,425,511	$ 2,279,274
Cash segregated for regulatory purposes	95,074	172,932
Total cash, cash equivalents, and cash segregated for regulatory purposes	$ 1,520,585	$ 2,452,206

Nature of Operations, Basis of

Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies	NOTE 1 – Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies Nature of Operations Stifel Financial Corp. (the “Company”), through its wholly owned subsidiaries, is principally engaged in retail brokerage; securities trading; investment banking; investment advisory; retail, consumer, and commercial banking; and related financial services. Our major geographic area of concentration is throughout the United States, with a growing presence in the United Kingdom, Europe, and Canada. Our company’s principal customers are individual investors, corporations, municipalities, and institutions. Basis of Presentation The consolidated financial statements include Stifel Financial Corp. and its wholly owned subsidiaries, principally Stifel, Nicolaus & Company, Incorporated (“Stifel”), Keefe, Bruyette & Woods, Inc., Stifel Bancorp, Inc. (“Stifel Bancorp”), Stifel Nicolaus Canada Inc. (“SNC”), and Stifel Nicolaus Europe Limited (“SNEL”). Unless otherwise indicated, the terms “we,” “us,” “our,” or “our company” in this report refer to Stifel Financial Corp. and its wholly owned subsidiaries. We have prepared the accompanying unaudited consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Pursuant to these rules and regulations, we have omitted certain information and footnote disclosures we normally include in our annual consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles. In management’s opinion, we have made all adjustments (consisting only of normal, recurring adjustments, except as otherwise noted) necessary to fairly present our financial position, results of operations and cash flows. Our interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. These financial statements and accompanying notes should be read in conjunction with the consolidated financial statements and the notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2020 on file with the SEC. On November 11, 2020, our Board approved a 50% stock dividend, in the form of a three-for-two Certain amounts from prior periods have been reclassified to conform to the current period’s presentation. The effect of these reclassifications on our company’s previously reported consolidated financial statements was not material. Consolidation Policies The consolidated financial statements include the accounts of Stifel Financial Corp. and its subsidiaries. All material intercompany balances and transactions have been eliminated in consolidation. We have investments or interests in other entities for which we must evaluate whether to consolidate by determining whether we have a controlling financial interest or are considered to be the primary beneficiary. Under our current consolidation policy, which complies with the provisions of ASC 810 as amended by ASU 2015-02, we consolidate those entities where we have the power to direct the activities of the entity that most significantly impact the entity’s economic performance and the obligation to absorb losses of the entity or the rights to receive benefits from the entity that could potentially be significant to the entity. We determine whether we are the primary beneficiary of a variable interest entity (“VIE”) by performing an analysis of the VIE’s control structure, expected benefits and losses, and expected residual returns. This analysis includes a review of, among other factors, the VIE’s capital structure, contractual terms, which interests create or absorb benefits or losses, variability, related party relationships, and the design of the VIE. We reassess our evaluation of whether an entity is a VIE when certain reconsideration events occur. We reassess our determination of whether we are the primary beneficiary of a VIE on an ongoing basis based on current facts and circumstances. See Note 24 for additional information on VIEs.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Prospective Adoption Of New Accounting Pronouncements [Abstract]
New Accounting Pronouncements	NOTE 2 – New Accounting Pronouncements Recently Adopted Accounting Guidance Income Taxes In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which is intended to simplify various aspects related to accounting for income taxes. This accounting update removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. We prospectively adopted the accounting update on January 1, 2021. The adoption did not have a material impact on our consolidated financial statements.

Receivables From And Payables T

Receivables From And Payables To Brokers, Dealers And Clearing Organizations	3 Months Ended
	Mar. 31, 2021
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables From And Payables To Brokers, Dealers And Clearing Organizations	NOTE 3 – Receivables From and Payables to Brokers, Dealers, and Clearing Organizations Amounts receivable from brokers, dealers, and clearing organizations at March 31, 2021 and December 31, 2020, included (in thousands) March 31, 2021 December 31, 2020 Deposits paid for securities borrowed $ 285,662 $ 313,131 Receivables from clearing organizations 242,807 229,070 Securities failed to deliver 33,963 7,291 $ 562,432 $ 549,492 Amounts payable to brokers, dealers, and clearing organizations at March 31, 2021 and December 31, 2020, included (in thousands) March 31, 2021 December 31, 2020 Deposits received from securities loaned $ 231,700 $ 145,124 Payable to clearing organizations 42,245 25,540 Securities failed to receive 34,992 7,273 $ 308,937 $ 177,937 Deposits paid for securities borrowed approximate the market value of the securities. Securities failed to deliver and receive represent the contract value of securities that have not been delivered or received on settlement date.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 4 – Fair Value Measurements We measure certain financial assets and liabilities at fair value on a recurring basis, including financial instruments owned, available-for-sale securities, investments, financial instruments sold, but not yet purchased, and derivatives. We generally utilize third-party pricing services to value Level 1 and Level 2 available-for-sale investment securities, as well as certain derivatives designated as cash flow hedges. We review the methodologies and assumptions used by the third-party pricing services and evaluate the values provided, principally by comparison with other available market quotes for similar instruments and/or analysis based on internal models using available third-party market data. We may occasionally adjust certain values provided by the third-party pricing service when we believe, as the result of our review, that the adjusted price most appropriately reflects the fair value of the particular security. Following are descriptions of the valuation methodologies and key inputs used to measure financial assets and liabilities recorded at fair value. The descriptions include an indication of the level of the fair value hierarchy in which the assets or liabilities are classified. Financial Instruments Owned and Available-For-Sale Securities When available, the fair value of financial instruments is based on quoted prices in active markets and reported in Level 1. Level 1 financial instruments include highly liquid instruments with quoted prices, such as equity securities listed in active markets, corporate fixed income securities, and U.S. government securities. If quoted prices are not available for identical instruments, fair values are obtained from pricing services, broker quotes, or other model-based valuation techniques with observable inputs, such as the present value of estimated cash flows, and reported as Level 2. The nature of these financial instruments include instruments for which quoted prices are available but traded less frequently, instruments whose fair value has been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed. Level 2 financial instruments include U.S. government agency securities, mortgage-backed securities, corporate fixed income and equity securities infrequently traded, state and municipal securities, sovereign debt, and asset-backed securities, which primarily include collateralized loan obligations. We have identified Level 3 financial instruments to include certain asset-backed securities and loans with unobservable pricing inputs. Level 3 financial instruments have little to no pricing observability as of the report date. These financial instruments do not have active two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation. Investments Investments carried at fair value primarily include corporate equity securities, auction-rate securities (“ARS”), and private company investments. Corporate equity securities are primarily valued based on quoted prices in active markets and reported in Level 1. ARS are primarily valued based upon our expectations of issuer redemptions and using internal discounted cash flow models that utilize unobservable inputs. ARS are primarily reported as Level 3 assets. Private company investments are primarily valued based upon internally developed models. These valuations require significant management judgment due to the absence of quoted market prices, the inherent lack of liquidity, and their long-term nature. Typically, the initial costs of these investments are considered to represent fair market value, as such amounts are negotiated between willing market participants. Private company investments are primarily reported as Level 3 assets. Investments at fair value include investments in funds, including certain money market funds that are measured at net asset value (“NAV”). The Company uses NAV to measure the fair value of its fund investments when (i) the fund investment does not have a readily determinable fair value and (ii) the NAV of the investment fund is calculated in a manner consistent with the measurement principles of investment company accounting, including measurement of the underlying investments at fair value. The Company’s investments in funds measured at NAV include partnership interests, mutual funds, private equity funds, and money market funds. Private equity funds primarily invest in a broad range of industries worldwide in a variety of situations, including leveraged buyouts, recapitalizations, growth investments and distressed investments. The private equity funds are primarily closed-end funds in which the Company’s investments are generally not eligible for redemption. Distributions will be received from these funds as the underlying assets are liquidated or distributed. The general and limited partnership interests in investment partnerships were primarily valued based upon NAVs received from third-party fund managers. The various partnerships are investment companies, which record their underlying investments at fair value based on fair value policies established by management of the underlying fund. Fair value policies at the underlying fund generally require the funds to utilize pricing/valuation information, including independent appraisals, from third-party sources. However, in some instances, current valuation information for illiquid securities or securities in markets that are not active may not be available from any third-party source or fund management may conclude that the valuations that are available from third-party sources are not reliable. In these instances, fund management may perform model-based analytical valuations that may be used as an input to value these investments. The table below presents the fair value of our investments in, and unfunded commitments to, funds that are measured at NAV as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 Fair value of investments Unfunded commitments Fair value of investments Unfunded commitments Money market funds $ 22,590 $ — $ 34,192 $ — Mutual funds 6,422 — 7,152 — Partnership interests 4,129 2,139 3,744 2,520 Private equity funds 2,002 1,203 1,489 1,203 Total $ 35,143 $ 3,342 $ 46,577 $ 3,723 Financial Instruments Sold, But Not Yet Purchased Financial instruments sold, but not purchased, recorded at fair value based on quoted prices in active markets and other observable market data include highly liquid instruments with quoted prices, such as U.S. government securities, equity and fixed income securities listed in active markets, which are reported as Level 1. If quoted prices are not available, fair values are obtained from pricing services, broker quotes, or other model-based valuation techniques with observable inputs, such as the present value of estimated cash flows, and reported as Level 2. The nature of these financial instruments include instruments for which quoted prices are available but traded less frequently, instruments whose fair value has been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed. Level 2 financial instruments include agency mortgage-backed securities not actively traded, corporate fixed income, sovereign debt securities, and state and municipal securities. Assets and liabilities measured at fair value on a recurring basis as of March 31, 2021, are presented below (in thousands) March 31, 2021 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 61,918 $ 61,918 $ — $ — U.S. government agency securities 166,501 — 166,501 — Agency mortgage-backed securities 254,203 — 254,203 — Corporate securities: Fixed income securities 223,545 220 223,325 — Equity securities 82,402 71,714 10,688 — State and municipal securities 162,083 — 162,083 — Other (1) 30,630 — 16,353 14,277 Total financial instruments owned 981,282 133,852 833,153 14,277 Available-for-sale securities: U.S. government agency securities 3,645 — 3,645 — State and municipal securities 2,428 — 2,428 — Mortgage-backed securities: Agency 1,003,691 — 1,003,691 — Commercial 87,439 — 87,439 — Non-agency 3,658 — 3,658 — Corporate fixed income securities 711,559 — 711,559 — Asset-backed securities 377,708 — 377,708 — Total available-for-sale securities 2,190,128 — 2,190,128 — Investments: Corporate equity securities 35,518 33,517 1 2,000 Auction rate securities 12,959 — — 12,959 Other 58,515 10,349 6,338 41,828 Investments in funds and partnerships measured at NAV 12,553 Total investments 119,545 43,866 6,339 56,787 Cash equivalents measured at NAV 22,590 $ 3,313,545 $ 177,718 $ 3,029,620 $ 71,064 (1) Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities. March 31, 2021 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 287,820 $ 287,820 $ — $ — Agency mortgage-backed securities 121,648 — 121,648 — Corporate securities: Fixed income securities 185,728 680 185,048 — Equity securities 34,443 34,443 — — Other (2) 15,123 — 15,123 — Total financial instruments sold, but not yet purchased $ 644,762 $ 322,943 $ 321,819 $ — (2) Includes U.S. government agency securities, sovereign debt, and state and municipal securities. Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020, are presented below (in thousands) December 31, 2020 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 46,900 $ 46,900 $ — $ — U.S. government agency securities 56,450 — 56,450 — Agency mortgage-backed securities 216,434 — 216,434 — Corporate securities: Fixed income securities 194,575 4,474 190,101 — Equity securities 67,593 62,979 4,614 — State and municipal securities 96,150 — 96,150 — Other (1) 15,926 — 4,642 11,284 Total financial instruments owned 694,028 114,353 568,391 11,284 Available-for-sale securities: U.S. government agency securities 4,361 — 4,361 — State and municipal securities 2,453 — 2,453 — Mortgage-backed securities: Agency 793,410 — 793,410 — Commercial 95,613 — 95,613 — Non-agency 4,569 — 4,569 — Corporate fixed income securities 631,758 — 631,758 — Asset-backed securities 698,133 — 698,133 — Total available-for-sale securities 2,230,297 — 2,230,297 — Investments: Corporate equity securities 29,496 29,496 — — Auction rate securities 12,933 — — 12,933 Other 59,048 10,342 6,593 42,113 Investments in funds and partnerships measured at NAV 12,385 Total investments 113,862 39,838 6,593 55,046 Cash equivalents measured at NAV 34,192 $ 3,072,379 $ 154,191 $ 2,805,281 $ 66,330 (1) Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities. December 31, 2020 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 91,974 $ 91,974 $ — $ — Agency mortgage-backed securities 141,227 — 141,227 — Corporate securities: Fixed income securities 162,626 4,094 158,532 — Equity securities 30,848 30,848 — — Other (2) 11,303 — 11,303 — Total financial instruments sold, but not yet purchased $ 437,978 $ 126,916 $ 311,062 $ — (2) Includes sovereign debt and state and municipal securities. The following table summarizes the changes in fair value associated with Level 3 financial instruments during the three months ended March 31, 2021 (in thousands) Three Months Ended March 31, 2021 Financial instruments owned Investments Other Corporate Equity Securities Auction Securities Other Balance at December 31, 2020 $ 11,284 $ — $ 12,933 $ 42,113 Unrealized gains/(losses) (21 ) — 26 (285 ) Purchases 3,014 2,000 — — Net change 2,993 2,000 26 (285 ) Balance at March 31, 2021 $ 14,277 $ 2,000 $ 12,959 $ 41,828 The results included in the table above are only a component of the overall investment strategies of our company. The table above does not present Level 1 or Level 2 valued assets or liabilities. The changes in unrealized gains/(losses) recorded in earnings for the three months ended March 31, 2021, relating to Level 3 assets still held at March 31, 2021, were immaterial. The fair value of certain Level 3 assets was determined using various methodologies, as appropriate, including third-party pricing vendors and broker quotes. These inputs are evaluated for reasonableness through various procedures, including due diligence reviews of third-party pricing vendors, variance analyses, consideration of current market environment, and other analytical procedures. The fair value for our auction rate securities was determined using an income approach based on an internally developed discounted cash flow model. The discounted cash flow model utilizes two significant unobservable inputs: discount rate and workout period. Significant increases in any of these inputs in isolation would result in a significantly lower fair value. On an ongoing basis, management verifies the fair value by reviewing the appropriateness of the discounted cash flow model and its significant inputs. Fair Value of Financial Instruments The following reflects the fair value of financial instruments as of March 31, 2021 and December 31, 2020, whether or not recognized in the consolidated statements of financial condition at fair value (in thousands) March 31, 2021 December 31, 2020 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 1,425,511 $ 1,425,511 $ 2,279,274 $ 2,279,274 Cash segregated for regulatory purposes 95,074 95,074 172,932 172,932 Securities purchased under agreements to resell 470,025 470,025 217,930 217,930 Financial instruments owned 981,282 981,282 694,028 694,028 Available-for-sale securities 2,190,128 2,190,128 2,230,297 2,230,297 Held-to-maturity securities 4,761,401 4,765,024 4,117,384 4,107,960 Bank loans 12,091,713 12,168,119 11,006,760 11,088,058 Loans held for sale 330,521 330,521 551,248 551,248 Investments 119,545 119,545 113,862 113,862 Financial liabilities: Securities sold under agreements to repurchase $ 208,228 $ 208,228 $ 190,955 $ 190,955 Bank deposits 18,715,133 18,527,784 17,396,497 17,192,722 Financial instruments sold, but not yet purchased 644,762 644,762 437,978 437,978 Senior notes 1,112,672 1,228,983 1,112,409 1,265,669 Debentures to Stifel Financial Capital Trusts 60,000 46,444 60,000 41,071 The following tables present the estimated fair values of financial instruments not measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,402,921 $ 1,402,921 $ — $ — Cash segregated for regulatory purposes 95,074 95,074 — — Securities purchased under agreements to resell 470,025 424,621 45,404 — Held-to-maturity securities 4,765,024 — 4,598,600 166,424 Bank loans 12,168,119 — 12,168,119 — Loans held for sale 330,521 — 330,521 — Financial liabilities: Securities sold under agreements to repurchase $ 208,228 $ — $ 208,228 $ — Bank deposits 18,527,784 — 18,527,784 — Senior notes 1,228,983 1,228,983 — — Debentures to Stifel Financial Capital Trusts 46,444 — — 46,444 December 31, 2020 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 2,245,082 $ 2,245,082 $ — $ — Cash segregated for regulatory purposes 172,932 172,932 — — Securities purchased under agreements to resell 217,930 164,094 53,836 — Held-to-maturity securities 4,107,960 — 3,943,944 164,016 Bank loans 11,088,058 — 11,088,058 — Loans held for sale 551,248 — 551,248 — Financial liabilities: Securities sold under agreements to repurchase $ 190,955 $ — $ 190,955 $ — Bank deposits 17,192,722 — 17,192,722 — Senior notes 1,265,669 1,265,669 — — Debentures to Stifel Financial Capital Trusts 41,071 — — 41,071 The following, as supplemented by the discussion above, describes the valuation techniques used in estimating the fair value of our financial instruments as of March 31, 2021 and December 31, 2020. Financial Assets Securities Purchased Under Agreements to Resell Securities purchased under agreements to resell are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. The carrying values at March 31, 2021 and December 31, 2020 approximate fair value due to their short-term nature. Held-to-Maturity Securities Securities held to maturity are recorded at amortized cost based on our company’s positive intent and ability to hold these securities to maturity. Securities held to maturity include agency mortgage-backed securities, asset-backed securities, consisting of collateralized loan obligation securities and corporate fixed income securities. The estimated fair value, included in the above table, is determined using several factors; however, primary weight is given to discounted cash flow modeling techniques that incorporated an estimated discount rate based upon recent observable debt security issuances with similar characteristics. Bank Loans The fair values of mortgage loans and commercial loans were estimated using a discounted cash flow method, a form of the income approach. Discount rates were determined considering rates at which similar portfolios of loans, with similar remaining maturities, would be made and considering liquidity spreads applicable to each loan portfolio based on the secondary market. Loans Held for Sale Loans held for sale consist of fixed-rate and adjustable-rate residential real estate mortgage loans intended for sale. Loans held for sale are stated at lower of cost or market value. Market value is determined based on prevailing market prices for loans with similar characteristics or on sale contract prices. Financial Liabilities Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. The carrying values at March 31, 2021 and December 31, 2020 approximate fair value due to the short-term nature. Bank Deposits The fair value of interest-bearing deposits, including certificates of deposits, demand deposits, savings, and checking accounts, was calculated by discounting the future cash flows using discount rates based on the replacement cost of funding of similar structures and terms. Senior Notes The fair value of our senior notes is estimated based upon quoted market prices. Debentures to Stifel Financial Capital Trusts The fair value of our trust preferred securities is based on the discounted value of contractual cash flows. We have assumed a discount rate based on similar type debt instruments. These fair value disclosures represent our best estimates based on relevant market information and information about the financial instruments. Fair value estimates are based on judgments regarding future expected losses, current economic conditions, risk characteristics of the various instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in the above methodologies and assumptions could significantly affect the estimates.

Financial Instruments Owned And

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased	3 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased	NOTE 5 – Financial Instruments Owned and Financial Instruments Sold, But Not Yet Purchased The components of financial instruments owned and financial instruments sold, but not yet purchased, at March 31, 2021 and December 31, 2020 are as follows (in thousands) March 31, 2021 December 31, 2020 Financial instruments owned: U.S. government securities $ 61,918 $ 46,900 U.S. government agency securities 166,501 56,450 Agency mortgage-backed securities 254,203 216,434 Corporate securities: Fixed income securities 223,545 194,575 Equity securities 82,402 67,593 State and municipal securities 162,083 96,150 Other (1) 30,630 15,926 $ 981,282 $ 694,028 Financial instruments sold, but not yet purchased: U.S. government securities $ 287,820 $ 91,974 Agency mortgage-backed securities 121,648 141,227 Corporate securities: Fixed income securities 185,728 162,626 Equity securities 34,443 30,848 Other (2) 15,123 11,303 $ 644,762 $ 437,978 (1) Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities. (2) Includes U.S. government agency securities, sovereign debt, and state and municipal securities. At March 31, 2021 and December 31, 2020, financial instruments owned in the amount of $180.5 million and $194.0 million, respectively, were pledged as collateral for our repurchase agreements and short-term borrowings. Our financial instruments owned are presented on a trade-date basis in the consolidated statements of financial condition. Financial instruments sold, but not yet purchased, represent obligations of our company to deliver the specified security at the contracted price, thereby creating a liability to purchase the security in the market at prevailing prices in future periods. We are obligated to acquire the securities sold short at prevailing market prices in future periods, which may exceed the amount reflected in the consolidated statements of financial condition.

Available-For-Sale And Held-To-

Available-For-Sale And Held-To-Maturity Securities	3 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Available-For-Sale And Held-To-Maturity Securities	NOTE 6 – Available-for-Sale and Held-to-Maturity Securities The following tables provide a summary of the amortized cost and fair values of the available-for-sale securities and held-to-maturity securities at March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 3,595 $ 50 $ — $ 3,645 State and municipal securities 2,389 39 — 2,428 Mortgage-backed securities: Agency 997,913 14,592 (8,814 ) 1,003,691 Commercial 84,555 2,914 (30 ) 87,439 Non-agency 3,648 10 — 3,658 Corporate fixed income securities 695,698 19,702 (3,841 ) 711,559 Asset-backed securities 378,201 3,493 (3,986 ) 377,708 $ 2,165,999 $ 40,800 $ (16,671 ) $ 2,190,128 Held-to-maturity securities (2) Asset-backed securities $ 4,761,401 $ 10,044 $ (6,421 ) $ 4,765,024 December 31, 2020 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,293 $ 68 $ — $ 4,361 State and municipal securities 2,395 58 — 2,453 Mortgage-backed securities: Agency 777,025 16,401 (16 ) 793,410 Commercial 91,237 4,376 — 95,613 Non-agency 4,550 28 (9 ) 4,569 Corporate fixed income securities 604,662 27,096 — 631,758 Asset-backed securities 700,177 3,522 (5,566 ) 698,133 $ 2,184,339 $ 51,549 $ (5,591 ) $ 2,230,297 Held-to-maturity securities (2) Asset-backed securities $ 4,117,384 $ 8,111 $ (17,535 ) $ 4,107,960 (1) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss. (2) Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements. We are required to evaluate our available-for-sale and held-to-maturity debt securities for any expected losses with recognition of an allowance for credit losses, when applicable. At March 31, 2021, we did not have an allowance for credit losses recorded on our investment portfolio. Accrued interest receivable for our investment portfolio at March 31, 2021 and December 31, 2020 was $22.5 million and $26.0 million, respectively, and is reported in other assets in the consolidated statements of financial condition. We do not include reserves for interest receivable in the measurement of the allowance for credit losses. During the three months ended March 31, 2021, we transferred $312.9 million of certain asset-backed securities from available-for-sale to held-to-maturity. Management determined that it has both the positive intent and ability to hold these securities to maturity. The reclassification of these securities was accounted for at fair value. On the date of transfer, the difference between the par value and the fair value of these securities resulted in a premium or discount that, under amortized cost accounting, will be amortized as a yield adjustment to interest income using the interest method. There were no gains or losses recognized as a result of this transfer. There were no sales of available-for-sale securities during the three months ended March 31, 2021. For the three months ended March 31, 2020, we received proceeds of $288.3 million from the sale of available-for-sale securities, which resulted in a realized loss of $0.7 million. During the three months ended March 31, 2021 and March 31, 2020, unrealized losses, net of deferred taxes, of $22.7 million and $73.2 million were recorded in accumulated other comprehensive loss in the consolidated statements of financial condition. The table below summarizes the amortized cost and fair values of our securities by contractual maturity at March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 December 31, 2020 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Available-for-sale securities Within one year $ 133,899 $ 134,463 $ 143,462 $ 144,362 After one year through three years 121,840 124,825 134,040 137,625 After three years through five years 242,071 254,774 247,907 266,139 After five years through ten years 348,662 350,871 429,921 435,111 After ten years 1,319,527 1,325,195 1,229,009 1,247,060 $ 2,165,999 $ 2,190,128 $ 2,184,339 $ 2,230,297 Held-to-maturity securities After three years through five years $ 1,623 $ 1,623 $ 17,460 $ 17,460 After five years through ten years 2,157,703 2,155,117 1,932,439 1,926,425 After ten years 2,602,075 2,608,284 2,167,485 2,164,075 $ 4,761,401 $ 4,765,024 $ 4,117,384 $ 4,107,960 The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at March 31, 2021, are as follows ( in thousands Within 1 Year 1-5 Years 5-10 Years After 10 Years Total Available-for-sale securities (1) U.S. government agency securities $ 2,522 $ 1,123 $ — $ — $ 3,645 State and municipal securities — — 2,428 — 2,428 Mortgage-backed securities: Agency 11 272 78,213 925,195 1,003,691 Commercial 10,416 10 — 77,013 87,439 Non-agency 2,970 — — 688 3,658 Corporate fixed income securities 118,544 378,194 214,821 — 711,559 Asset-backed securities — — 55,409 322,299 377,708 $ 134,463 $ 379,599 $ 350,871 $ 1,325,195 $ 2,190,128 Held-to-maturity securities Asset-backed securities $ — $ 1,623 $ 2,157,703 $ 2,602,075 $ 4,761,401 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis. At March 31, 2021 and December 31, 2020, securities of $534.8 million and $368.4 million, respectively, were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. At March 31, 2021 and December 31, 2020, securities of $1.0 billion and $1.4 billion, respectively, were pledged with the Federal Reserve discount window. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at March 31, 2021 (in thousands) Less than 12 months 12 months or more Total Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Available-for-sale securities Mortgage-backed securities: Agency $ (8,814 ) $ 489,231 $ — $ — $ (8,814 ) $ 489,231 Commercial (30 ) 10,416 — — (30 ) 10,416 Corporate fixed income securities (3,841 ) 143,201 — — (3,841 ) 143,201 Asset-backed securities (1,267 ) 43,136 (2,719 ) 150,571 (3,986 ) 193,707 $ (13,952 ) $ 685,984 $ (2,719 ) $ 150,571 $ (16,671 ) $ 836,555 At March 31, 2021, the amortized cost of 45 securities classified as available for sale exceeded their fair value by $16.7 million, of which $2.7 million related to investment securities that had been in a loss position for 12 months or longer. The total fair value of these investments at March 31, 2021, was $836.6 million, which was 38.2% of our available-for-sale portfolio. Credit Quality Indicators The Company uses Moody credit ratings as the primary credit quality indicator for its held-to-maturity debt securities. Each security is evaluated at least quarterly. The indicators represent the rating for debt securities, as of the date presented, based on the most recent assessment performed. The following table shows the amortized cost of our held-to-maturity securities by credit quality indicator at March 31, 2021 (in thousands) AAA AA A C Total Held-to-maturity securities Asset-backed securities $ 1,280,256 $ 3,445,799 $ 32,855 $ 2,491 $ 4,761,401

Bank Loans

Bank Loans	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Bank Loans	NOTE 7 – Bank Loans Our loan portfolio consists primarily of the following segments: Commercial and industrial (C&I). C&I loans primarily include commercial and industrial lending used for general corporate purposes, working capital and liquidity, and “event-driven." “Event-driven” loans support client merger, acquisition or recapitalization activities. C&I lending is structured as revolving lines of credit, letter of credit facilities, term loans and bridge loans. Risk factors considered in determining the allowance for corporate loans include the borrower’s financial strength, seniority of the loan, collateral type, leverage, volatility of collateral value, debt cushion, and covenants. Real Estate. Real estate loans include residential real estate non-conforming loans, residential real estate conforming loans, commercial real estate, and home equity lines of credit. The allowance methodology related to real estate loans considers several factors, including, but not limited to, loan-to-value ratio, FICO score, home price index, delinquency status, credit limits, and utilization rates. Securities-based loans. Securities-based loans allow clients to borrow money against the value of qualifying securities for any suitable purpose other than purchasing, trading, or carrying securities or refinancing margin debt. The majority of consumer loans are structured as revolving lines of credit and letter of credit facilities and are primarily offered through Stifel’s Pledged Asset ("SPA") program. The allowance methodology for securities-based lending considers the collateral type underlying the loan, including the liquidity and trading volume of the collateral, position concentration and other borrower specific factors such as personal guarantees. Construction and land. Short-term loans used to finance the development of a real estate project. Other. Other loans include consumer and credit card lending. The following table presents the balance and associated percentage of each major loan category in our bank loan portfolio at March 31, 2021 and December 31, 2020 (in thousands, except percentages) March 31, 2021 December 31, 2020 Balance Percent Balance Percent Commercial and industrial $ 4,923,494 40.3 % $ 4,296,089 38.5 % Residential real estate 4,158,033 34.0 3,956,670 35.4 Securities-based loans 2,089,747 17.1 1,933,974 17.3 Construction and land 560,191 4.6 501,681 4.5 Commercial real estate 374,736 3.1 366,485 3.3 Home equity lines of credit 71,172 0.6 75,507 0.7 Other 37,819 0.3 40,407 0.3 Gross bank loans 12,215,192 100.0 % 11,170,813 100.0 % Unamortized loan discount, net (1,695 ) (1,822 ) Loans in process (13,012 ) (48,222 ) Unamortized loan fees, net (1,104 ) (1,980 ) Allowance for loan losses (107,668 ) (112,029 ) Loans held for investment, net $ 12,091,713 $ 11,006,760 At March 31, 2021 and December 31, 2020, Stifel Bancorp had loans outstanding to its executive officers and directors and executive officers and directors of certain affiliated entities in the amount of $25.1 At March 31, 2021 and December 31, 2020, we had loans held for sale of $330.5 million and $551.2 million, respectively. For the three months ended March 31, 2021 and 2020, we recognized gains of $13.9 million and $2.5 million, respectively, from the sale of originated loans, net of fees and costs. Accrued interest receivable for loans and loans held for sale at March 31, 2021 and December 31, 2020 was $21.3 million and $20.8 million, respectively, and is reported in other assets on the consolidated statement of financial condition. The following table details activity in the allowance for loan losses by portfolio segment for the three months ended March 31, 2021 (in thousands) Three Months Ended March 31, 2021 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 67,222 $ (9,972 ) $ (934 ) $ — $ 56,316 Construction and land 17,275 1,598 — — 18,873 Residential real estate 16,300 365 — — 16,665 Commercial real estate 8,580 4,480 — — 13,060 Securities-based loans 2,015 154 — — 2,169 Home equity lines of credit 374 (33 ) — — 341 Other 263 (19 ) — — 244 $ 112,029 $ (3,427 ) $ (934 ) $ — $ 107,668 The provision for unfunded lending commitments was a credit of $1.8 million and $2.9 million for the three months ended March 31, 2021 and 2020, respectively, and is included in the provision for credit losses on the consolidated statement of operations. The expected credit losses for unfunded lending commitments, including standby letters of credit and binding unfunded loan commitments, are reported on the consolidated statement of financial condition in accounts payable and accrued expenses. The following table details activity in the allowance for loan losses by portfolio segment for the three months ended March 31, 2020 (in thousands) Three Months Ended March 31, 2020 Beginning Balance CECL Adoption Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 69,949 $ (19,940 ) $ 9,955 $ (2 ) $ — $ 59,962 Residential real estate 14,253 3,499 2,233 — — 19,985 Construction and land 4,613 2,674 3,666 — — 10,953 Commercial real estate 3,564 791 3,810 — — 8,165 Securities-based loans 2,361 1,346 (792 ) — — 2,915 Home equity lines of credit 442 39 57 — 1 539 Other 397 (145 ) 49 (18 ) — 283 $ 95,579 $ (11,736 ) $ 18,978 $ (20 ) $ 1 $ 102,802 At March 31, 2021, we had $13.6 million of impaired loans, net of discounts, which included $0.2 million in troubled debt restructurings. The specific allowance on impaired loans at March 31, 2021 was $8.2 million. At December 31, 2020, we had $13.8 million of impaired loans, net of discounts, which included $0.2 million in troubled debt restructurings. The specific allowance on impaired loans at December 31, 2020 was $8.2 million. The gross interest income related to impaired loans, which would have been recorded, had these loans been current in accordance with their original terms, and the interest income recognized on these loans during the three months ended March 31, 2021 and 2020, were insignificant to the consolidated financial statements. In December 2020, the U.S. federal government enacted the Consolidated Appropriations Act of 2021, which provided additional COVID-19 relief to American families and business, including extending TDR relief under the CARES Act until the earlier of December 31, 2021, or 60 days following the termination of the national emergency. The following tables present the aging of the recorded investment in past due loans at March 31, 2021 and December 31, 2020 by portfolio segment (in thousands) As of March 31, 2021 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Commercial and industrial $ — $ 11,408 $ 11,408 $ 4,912,086 $ 4,923,494 Residential real estate 3,941 1,925 5,866 4,152,167 4,158,033 Securities-based loans — — — 2,089,747 2,089,747 Construction and land — — — 560,191 560,191 Commercial real estate — 144 144 374,592 374,736 Home equity lines of credit 233 — 233 70,939 71,172 Other 17 — 17 37,802 37,819 Total $ 4,191 $ 13,477 $ 17,668 $ 12,197,524 $ 12,215,192 As of March 31, 2021* Non-Accrual Restructured Nonperforming loans with no allowance Total Commercial and industrial $ 11,408 $ — $ — $ 11,408 Residential real estate 676 158 1,249 2,083 Commercial real estate 144 — — 144 Total $ 12,228 $ 158 $ 1,249 $ 13,635 * There were no loans past due 90 days and still accruing interest at March 31, 2021. As of December 31, 2020 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ 14 $ 12,237 $ 12,251 $ 4,283,838 $ 4,296,089 Residential real estate 4,554 1,249 5,803 3,950,867 3,956,670 Securities-based loans — — — 1,933,974 1,933,974 Construction and land — — — 501,681 501,681 Commercial real estate — 144 144 366,341 366,485 Home equity lines of credit 12 — 12 75,495 75,507 Other 31 — 31 40,376 40,407 Total $ 4,611 $ 13,630 $ 18,241 $ 11,152,572 $ 11,170,813 As of December 31, 2020* Non-Accrual Restructured Nonperforming loans with no allowance Total Commercial and industrial $ 12,251 $ — $ — $ 12,251 Residential real estate — 158 1,249 1,407 Commercial real estate 144 — — 144 Total $ 12,395 $ 158 $ 1,249 $ 13,802 * There were no loans past due 90 days and still accruing interest at December 31, 2020. Credit quality indicators As of March 31, 2021, bank loans were primarily extended to non-investment grade borrowers. Substantially all of these loans align with the U.S. Federal bank regulatory agencies’ definition of Pass. Loans meet the definition of Pass when they are performing and do not demonstrate adverse characteristics that are likely to result in a credit loss. A loan is determined to be impaired when principal or interest becomes 90 days past due or when collection becomes uncertain. At the time a loan is determined to be impaired, the accrual of interest and amortization of deferred loan origination fees is discontinued (“non-accrual status”), and any accrued and unpaid interest income is reversed. We closely monitor economic conditions and loan performance trends to manage and evaluate our exposure to credit risk. Trends in delinquency ratios are an indicator, among other considerations, of credit risk within our loan portfolio. The level of nonperforming assets represents another indicator of the potential for future credit losses. Accordingly, key metrics we track and use in evaluating the credit quality of our loan portfolio include delinquency and nonperforming asset rates, as well as charge-off rates and our internal risk ratings of the loan portfolio. In general, we are a secured lender. At March 31, 2021 and December 31, 2020, 98.9% and 98.8% of our loan portfolio was collateralized, respectively. Collateral is required in accordance with the normal credit evaluation process based upon the creditworthiness of the customer and the credit risk associated with the particular transaction. The Company uses the following definitions for risk ratings: Pass. A credit exposure rated pass has a continued expectation of timely repayment, all obligations of the borrower are current, and the obligor complies with material terms and conditions of the lending agreement. Special Mention. Extensions of credit that have potential weakness that deserve management’s close attention, and if left uncorrected may, at some future date, result in the deterioration of the repayment prospects or collateral position. Substandard. Obligor has a well-defined weakness that jeopardizes the repayment of the debt and has a high probability of payment default with the distinct possibility that the Company will sustain some loss if noted deficiencies are not corrected. Doubtful. Inherent weakness in the exposure makes the collection or repayment in full, based on existing facts, conditions and circumstances, highly improbable, and the amount of loss is uncertain. Substandard loans are regularly reviewed for impairment. Doubtful loans are considered impaired. When a loan is impaired the impairment is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, or as a practical expedient, the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent. Based on the most recent analysis performed, the risk category of our loan portfolio was as follows (in thousands) As of March 31, 2021 Pass Special Substandard Doubtful Total Commercial and industrial $ 4,607,280 $ 164,839 $ 139,967 $ 11,408 $ 4,923,494 Residential real estate 4,155,773 335 — 1,925 4,158,033 Securities-based loans 2,089,747 — — — 2,089,747 Construction and land 525,951 14,240 20,000 — 560,191 Commercial real estate 366,154 5,802 2,636 144 374,736 Home equity lines of credit 71,172 — — — 71,172 Other 37,819 — — — 37,819 Total $ 11,853,896 $ 185,216 $ 162,603 $ 13,477 $ 12,215,192 As of December 31, 2020 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,995,351 $ 105,759 $ 182,728 $ 12,251 $ 4,296,089 Residential real estate 3,955,421 — — 1,249 3,956,670 Securities-based loans 1,933,974 — — — 1,933,974 Construction and land 467,441 14,240 20,000 — 501,681 Commercial real estate 356,008 10,333 — 144 366,485 Home equity lines of credit 75,507 — — — 75,507 Other 40,407 — — — 40,407 Total $ 10,824,109 $ 130,332 $ 202,728 $ 13,644 $ 11,170,813 Term Loans Amortized Cost Basis by Origination Year – March 31, 2021 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total Commercial and industrial: Pass $ 852,103 $ 494,747 $ 527,136 $ 679,772 $ 302,188 $ 502,085 $ 1,249,249 $ 4,607,280 Special Mention — 503 30,309 82,558 45,947 4,200 1,322 164,839 Substandard — — 23,921 43,195 63,558 7,762 1,531 139,967 Doubtful — — — — 11,394 14 — 11,408 $ 852,103 $ 495,250 $ 581,366 $ 805,525 $ 423,087 $ 514,061 $ 1,252,102 $ 4,923,494 Residential real estate: Pass $ 485,925 $ 1,548,638 $ 815,040 $ 340,371 $ 271,808 $ 693,991 $ — $ 4,155,773 Special Mention — — — — — 335 — 335 Substandard — — — — — — — — Doubtful — — — — 825 1,100 — 1,925 $ 485,925 $ 1,548,638 $ 815,040 $ 340,371 $ 272,633 $ 695,426 $ — $ 4,158,033 Securities-based loans: Pass $ 973 $ 38,702 $ 102,973 $ 294 $ 140 $ 16,906 $ 1,929,759 $ 2,089,747 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ 973 $ 38,702 $ 102,973 $ 294 $ 140 $ 16,906 $ 1,929,759 $ 2,089,747 Construction and land: Pass $ 13,842 $ 87,316 $ 218,904 $ 128,179 $ 62,248 $ 6,401 $ 9,061 $ 525,951 Special Mention — — — 14,240 — — — 14,240 Substandard — — — 20,000 — — — 20,000 Doubtful — — — — — — — — $ 13,842 $ 87,316 $ 218,904 $ 162,419 $ 62,248 $ 6,401 $ 9,061 $ 560,191 Commercial real estate: Pass $ 22,047 $ 81,378 $ 152,732 $ 25,328 $ 38,352 $ 45,975 $ 342 $ 366,154 Special Mention — — — — — 5,802 — 5,802 Substandard — — — — — 2,636 — 2,636 Doubtful — — — 144 — — — 144 $ 22,047 $ 81,378 $ 152,732 $ 25,472 $ 38,352 $ 54,413 $ 342 $ 374,736 Home equity lines of credit: Pass $ — $ — $ — $ — $ — $ — $ 71,172 $ 71,172 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ — $ — $ — $ — $ 71,172 $ 71,172 Other: Pass $ — $ — $ — $ 4 $ — $ 445 $ 37,370 $ 37,819 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ — $ 4 $ — $ 445 $ 37,370 $ 37,819

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	NOTE 8 – Goodwill and Intangible Assets The carrying amount of goodwill and intangible assets attributable to each of our reporting segments is presented in the following table (in thousands) December 31, 2020 Adjustments Write-off March 31, 2021 Goodwill Global Wealth Management $ 335,009 $ — $ — $ 335,009 Institutional Group 846,989 315 — 847,304 $ 1,181,998 $ 315 $ — $ 1,182,313 December 31, 2020 Adjustments Amortization March 31, 2021 Intangible assets Global Wealth Management $ 44,671 $ — $ (1,305 ) $ 43,366 Institutional Group 96,313 60 (2,963 ) 93,410 $ 140,984 $ 60 $ (4,268 ) $ 136,776 The adjustments to goodwill and intangible assets during the three months ended March 31, 2021 are primarily attributable to the acquisition of North Atlantic Capital Corporation in February 2021 Amortizable intangible assets consist of acquired customer relationships, trade name, investment banking backlog, and non-compete agreements that are amortized over their contractual or determined useful lives. Intangible assets as of March 31, 2021 and December 31, 2020 were as follows (in thousands) March 31, 2021 December 31, 2020 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 202,424 $ 87,941 $ 202,342 $ 85,152 Trade names 28,659 16,097 28,659 15,660 Non-compete agreements 9,240 4,586 9,240 4,229 Core deposits 8,615 5,210 8,615 4,809 Investment banking backlog 4,245 2,970 4,245 2,734 Acquired technology 840 443 840 373 $ 254,023 $ 117,247 $ 253,941 $ 112,957 Amortization expense related to intangible assets was $4.3 million and $5.0 million for the three months ended March 31, 2021 and 2020, respectively. Amortization expense is included in other operating expenses in the consolidated statements of operations. The weighted-average remaining lives of the following intangible assets at March 31, 2021, are: customer relationships, 10.3 years; trade name, 9.1 years; non-compete agreements, 5.9 years; core deposits, 3.3 years; investment banking backlog, 7.9 years; and acquired technology, 1.5 years. We have an intangible asset that is not subject to amortization and is, therefore, not included in the table below. As of March 31, 2021, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2021 $ 13,554 2022 16,454 2023 14,601 2024 13,888 2025 11,841 Thereafter 64,320 $ 134,658

Borrowings and Federal Home Loa

Borrowings and Federal Home Loan Bank Advances	3 Months Ended
	Mar. 31, 2021
Short Term Debt Other Disclosures [Abstract]
Borrowings and Federal Home Loan Bank Advances	NOTE 9 – Borrowings and Federal Home Loan Bank Advances Our short-term financing is generally obtained through short-term bank line financing on an uncommitted, secured basis, securities lending arrangements, repurchase agreements, advances from the Federal Home Loan Bank, term loans, and committed bank line financing on an unsecured basis. We borrow from various banks on a demand basis with company-owned and customer securities pledged as collateral. The value of customer-owned securities used as collateral is not reflected in the consolidated statements of financial condition. We also have an unsecured, committed bank line available. Our uncommitted secured lines of credit at March 31, 2021, totaled $880.0 million with four banks and are dependent on having appropriate collateral, as determined by the bank agreements, to secure an advance under the line. The availability of our uncommitted lines is subject to approval by the individual banks each time an advance is requested and may be denied. Our peak daily borrowing on our uncommitted secured lines was $50.0 million during the three months ended March 31, 2021. There are no compensating balance requirements under these arrangements. Any borrowings on secured lines of credit are generally utilized to finance certain fixed income securities. At March 31, 2021, we had no outstanding balances on our uncommitted secured lines of credit. Federal Home Loan advances are floating-rate advances. The weighted average interest rates on these advances during the three months ended March 31, 2021 was 0.29%. The advances are secured by Stifel Bancorp’s residential mortgage loan portfolio and investment portfolio. The interest rates reset on a daily basis. Stifel Bancorp has the option to prepay these advances without penalty on the interest reset date. At March 31, 2021, there were no Federal Home Loan advances. Our committed bank line financing at March 31, 2021, consisted of a $200.0 million revolving credit facility. The credit facility expires in March 2024. The applicable interest rate under the revolving credit facility is calculated as a per annum rate equal to the London Interbank Offered Rate (“LIBOR”) plus 1.75%, as defined in the revolving credit facility. At March 31, 2021, we had no advances on our revolving credit facility and were in compliance with all covenants. Stifel, our broker-dealer subsidiary, has a 364-day Credit Agreement (“Stifel Credit Facility”) with a maturity date of June 2021 in which the lenders are a number of financial institutions. This committed unsecured borrowing facility provides for maximum borrowings of up to $300.0 million at variable rates of interest. At March 31, 2021, we had no advances on the Stifel Credit Facility and were in compliance with all covenants.

Senior Notes

Senior Notes	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Senior Notes	NOTE 10 – Senior Notes The following table summarizes our senior notes as of March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 December 31, 2020 4.25% senior notes, due 2024 (1) $ 500,000 $ 500,000 4.00% senior notes, due 2030 (2) 400,000 400,000 5.20% senior notes, due 2047 (3) 225,000 225,000 1,125,000 1,125,000 Debt issuance costs, net (12,328 ) (12,591 ) Senior notes, net $ 1,112,672 $ 1,112,409 (1) In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.25% senior notes due July 2024 (2) In May 2020, we sold in a registered underwritten public offering, $400.0 million in aggregate principal amount of 4.00% senior notes due May 2030 (3) October 2047 Our senior notes mature as follows, based upon contractual terms (in thousands) 2021 $ — 2022 — 2023 — 2024 500,000 2025 — Thereafter 625,000 $ 1,125,000

Bank Deposits

Bank Deposits	3 Months Ended
	Mar. 31, 2021
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Bank Deposits	NOTE 11 – Bank Deposits Deposits consist of interest-bearing-demand deposits (primarily money market and savings accounts), non-interest-bearing demand deposits, and certificates of deposit. Deposits at March 31, 2021 and December 31, 2020 were as follows (in thousands) March 31, 2021 December 31, 2020 Demand deposits (interest-bearing) $ 18,125,863 $ 16,886,953 Demand deposits (non-interest-bearing) 524,338 411,890 Certificates of deposit 64,932 97,654 $ 18,715,133 $ 17,396,497 The weighted-average interest rate on deposits was 0.03% and 0.09% at March 31, 2021 and December 31, 2020, respectively. Scheduled maturities of certificates of deposit at March 31, 2021 and December 31, 2020 were as follows (in thousands): March 31, 2021 December 31, 2020 Certificates of deposit, less than $100,000: Within one year $ 2,222 $ 2,719 One to three years 263 409 Three to five years 54 254 $ 2,539 $ 3,382 Certificates of deposit, $100,000 and greater: Within one year $ 35,419 $ 63,650 One to three years 26,874 30,622 Three to five years 100 — 62,393 94,272 $ 64,932 $ 97,654 At March 31, 2021 and December 31, 2020, the amount of deposits includes related party deposits, primarily interest-bearing and time deposits of executive officers, directors, and their affiliates of $6.4 million and $6.7 million, respectively. Brokerage customers’ deposits were $16.8 billion and $16.0 billion, respectively.

Disclosures About Offsetting As

Disclosures About Offsetting Assets and Liabilities	3 Months Ended
	Mar. 31, 2021
Offsetting [Abstract]
Disclosures About Offsetting Assets and Liabilities	NOTE 12 – Disclosures About Offsetting Assets and Liabilities The following tables provide information about financial assets that are subject to offset as of March 31, 2021 and December 31, 2020 (in thousands) As of March 31, 2021 Securities borrowing (1) Reverse repurchase agreements (2) Total Gross amounts of recognized assets $ 285,662 $ 470,025 $ 755,687 Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition 285,662 470,025 755,687 Gross amounts not offset in the statement of financial condition: Amounts available for offset (51,786 ) (22,733 ) (74,519 ) Available collateral (226,199 ) (445,144 ) (671,343 ) Net amount $ 7,677 $ 2,148 $ 9,825 As of December 31, 2020 Securities borrowing (1) Reverse repurchase agreements (2) Total Gross amounts of recognized assets $ 313,131 $ 217,930 $ 531,061 Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition 313,131 217,930 531,061 Gross amounts not offset in the statement of financial condition: Amounts available for offset (46,183 ) (17,992 ) (64,175 ) Available collateral (244,578 ) (199,110 ) (443,688 ) Net amount $ 22,370 $ 828 $ 23,198 (1) Securities borrowing transactions are included in receivables from brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 3 in the notes to consolidated financial statements for additional information on receivables from brokers, dealers, and clearing organizations. (2) Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $467.9 million and $217.3 million at March 31, 2021 and December 31, 2020, respectively. The following tables provide information about financial liabilities that are subject to offset as of March 31, 2021 and December 31, 2020 (in thousands) As of March 31, 2021 Securities lending (3) Repurchase agreements (4) Total Gross amounts of recognized liabilities $ (231,700 ) $ (208,228 ) $ (439,928 ) Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition (231,700 ) (208,228 ) (439,928 ) Gross amounts not offset in the statement of financial condition: Amounts available for offset 51,786 22,733 74,519 Collateral pledged 178,055 185,495 363,550 Net amount $ (1,859 ) $ — $ (1,859 ) As of December 31, 2020 Securities lending (3) Repurchase agreements (4) Total Gross amounts of recognized liabilities $ (145,124 ) $ (190,955 ) $ (336,079 ) Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition (145,124 ) (190,955 ) (336,079 ) Gross amounts not offset in the statement of financial condition: Amounts available for offset 46,183 17,992 64,175 Collateral pledged 98,925 172,963 271,888 Net amount $ (16 ) $ — $ (16 ) (3) Securities lending transactions are included in payables to brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 3 in the notes to consolidated financial statements for additional information on payables to brokers, dealers, and clearing organizations. (4) Collateral pledged includes the fair value of securities pledged by our company to the counterparty. These securities are included in the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counterparty includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $218.1 million and $200.2 million at March 31, 2021 and December 31, 2020, respectively.

Commitments, Guarantees, and Co

Commitments, Guarantees, and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments, Guarantees, and Contingencies	NOTE 13 – Commitments, Guarantees, and Contingencies Broker-Dealer Commitments and Guarantees In the normal course of business, we enter into underwriting commitments. Settlement of transactions relating to such underwriting commitments, which were open at March 31, 2021, had no material effect on the consolidated financial statements. As a part of our fixed income public finance operations, we enter into forward commitments to purchase agency mortgage-backed securities. In order to hedge the market interest rate risk to which we would otherwise be exposed between the date of the commitment and date of sale of the mortgage-backed securities, we enter into to be announced (“TBA”) security contracts with investors for generic mortgage-backed security at specific rates and prices to be delivered on settlement dates in the future. We may be subject to loss if the timing of, or the actual amount of, the mortgage-backed security differs significantly from the term and notional amount of the TBA security contract to which we entered. These TBA securities and related purchase commitment are accounted for at fair value. As of March 31, 2021, the fair value of the TBA securities and the estimated fair value of the purchase commitments were $121.6 We also provide guarantees to securities clearinghouses and exchanges under their standard membership agreement, which requires members to guarantee the performance of other members. Under the agreement, if another member becomes unable to satisfy its obligations to the clearinghouse, other members would be required to meet shortfalls. Our liability under these agreements is not quantifiable and may exceed the cash and securities we have posted as collateral. However, the potential requirement for us to make payments under these arrangements is considered remote. Accordingly, no liability has been recognized for these arrangements. Other Commitments In the ordinary course of business, Stifel Bancorp has commitments to extend credit in the form of commitments to originate loans, standby letters of credit, and lines of credit. See Note 20 in the notes to consolidated financial statements for further details. Concentration of Credit Risk We provide investment, capital-raising, and related services to a diverse group of domestic customers, including governments, corporations, and institutional and individual investors. Our exposure to credit risk associated with the non-performance of customers in fulfilling their contractual obligations pursuant to securities transactions can be directly impacted by volatile securities markets, credit markets, and regulatory changes. This exposure is measured on an individual customer basis and on a group basis for customers that share similar attributes. To reduce the potential for risk concentrations, counterparty credit limits have been implemented for certain products and are continually monitored in light of changing customer and market conditions. As of March 31, 2021, we did not have significant concentrations of credit risk with any one customer or counterparty, or any group of customers or counterparties.

Legal Proceedings

Legal Proceedings	3 Months Ended
	Mar. 31, 2021
Loss Contingency Information About Litigation Matters [Abstract]
Legal Proceedings	NOTE 14 – Legal Proceedings Our company and its subsidiaries are named in and subject to various proceedings and claims arising primarily from our securities business activities, including lawsuits, arbitration claims, class actions, and regulatory matters. Some of these claims seek substantial compensatory, punitive, or indeterminate damages. Our company and its subsidiaries are also involved in other reviews, investigations, and proceedings by governmental and self-regulatory organizations regarding our business, which may result in adverse judgments, settlements, fines, penalties, injunctions, and other relief. We are contesting allegations in these claims, and we believe that there are meritorious defenses in each of these lawsuits, arbitrations, and regulatory investigations. In view of the number and diversity of claims against our company, the number of jurisdictions in which litigation is pending, and the inherent difficulty of predicting the outcome of litigation and other claims, we cannot state with certainty what the eventual outcome of pending litigation or other claims will be. We have established reserves for potential losses that are probable and reasonably estimable that may result from pending and potential legal actions, investigations, and regulatory proceedings. In many cases, however, it is inherently difficult to determine whether any loss is probable or reasonably possible or to estimate the amount or range of any potential loss, particularly where proceedings may be in relatively early stages or where plaintiffs are seeking substantial or indeterminate damages. Matters frequently need to be more developed before a loss or range of loss can reasonably be estimated. In our opinion, based on currently available information, review with outside legal counsel, and consideration of amounts provided for in our consolidated financial statements with respect to these matters, including the matter described below, the ultimate resolution of these matters will not have a material adverse impact on our financial position and results of operations. However, resolution of one or more of these matters may have a material effect on the results of operations in any future period, depending upon the ultimate resolution of those matters and depending upon the level of income for such period. For matters where a reserve has not been established and for which we believe a loss is reasonably possible, as well as for matters where a reserve has been recorded but for which an exposure to loss in excess of the amount accrued is reasonably possible, based on currently available information, we believe that such losses will not have a material effect on our consolidated financial statements. Karegnondi Water Authority Stifel has been named as a defendant in a United States District Court, Eastern District of Michigan, Southern Division, litigation in connection with the underwriting of bonds to finance the Karegnondi Water Authority (“KWA”) pipeline, a new water pipeline intended to serve Flint, Michigan and surrounding areas. The lawsuit is filed against JP Morgan Chase, as senior manager, and Stifel and Wells Fargo, as co-managers, who underwrote the bonds for the KWA in 2014. The complaint alleges novel claims against the underwriter defendants, including conspiracy and professional negligence. We intend to defend vigorously against the allegations.

Regulatory Capital Requirements

Regulatory Capital Requirements	3 Months Ended
	Mar. 31, 2021
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	NOTE 15 – Regulatory Capital Requirements We operate in a highly regulated environment and are subject to capital requirements, which may limit distributions to our company from its subsidiaries. Distributions from our broker-dealer subsidiaries are subject to net capital rules. A broker-dealer that fails to comply with the SEC’s Uniform Net Capital Rule (Rule 15c3-1) may be subject to disciplinary actions by the SEC and self-regulatory organizations, such as FINRA, including censures, fines, suspension, or expulsion. Stifel has chosen to calculate its net capital under the alternative method, which prescribes that their net capital shall not be less than the greater of $1.0 million or two percent of aggregate debit balances (primarily receivables from customers) computed in accordance with the SEC’s Customer Protection Rule (Rule 15c3-3). Our other broker-dealer subsidiaries calculate their net capital under the aggregate indebtedness method, whereby their aggregate indebtedness may not be greater than fifteen times their net capital (as defined). At March 31, 2021, Stifel had net capital of $570.3 million, which was 39.8% of aggregate debit items and $541.6 million in excess of its minimum required net capital. At March 31, 2021, all of our other broker-dealer subsidiaries’ net capital exceeded the minimum net capital required under the SEC rule. Our international subsidiary, SNEL, is subject to the regulatory supervision and requirements of the Financial Conduct Authority (“FCA”) in the United Kingdom. At March 31, 2021, our international subsidiary’s capital and reserves were in excess of the financial resources requirement under the rules of the FCA. Our Canadian subsidiary, SNC, is subject to the regulatory supervision and requirements of the Investment Industry Regulatory Organization of Canada (“IIROC”). At March 31, 2021, SNC’s net capital and reserves were in excess of the financial resources requirement under the rules of the IIROC. Our company, as a bank holding company, Stifel Bank & Trust, Stifel Bank, Stifel Trust Company, N.A., and Stifel Trust Company, Delaware, N.A. (collectively, “banking subsidiaries”) are subject to various regulatory capital requirements administered by the Federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our company’s and it’s banking subsidiaries’ financial results. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, our company and its banking subsidiaries must meet specific capital guidelines that involve quantitative measures of our assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. Our company’s and its banking subsidiaries’ capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Under the Basel III rules, the quantity and quality of regulatory capital increased, a capital conservation buffer was established, selected changes were made to the calculation of risk-weighted assets, and a new ratio, common equity Tier 1 was introduced, all of which are applicable to both our company and its banking subsidiaries. Our company and its banking subsidiaries are required to maintain minimum amounts and ratios of Total and Tier 1 capital (as defined) to risk-weighted assets (as defined), Tier 1 capital to average assets (as defined), and under rules defined in Basel III, Common equity Tier 1 capital to risk-weighted assets. Our company and its banking subsidiaries each calculate these ratios in order to assess compliance with both regulatory requirements and their internal capital policies. At current capital levels, our company and its banking subsidiaries are each categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” our company and its banking subsidiaries must maintain total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios. The amounts and ratios for Stifel Financial Corp., Stifel Bank & Trust, and Stifel Bank as of March 31, 2021 are represented in the tables below (in thousands, except ratios). Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Stifel Financial Corp. Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 2,498,655 16.0 % $ 704,519 4.5 % $ 1,017,639 6.5 % Tier 1 capital 3,033,655 19.4 % 939,359 6.0 % 1,252,479 8.0 % Total capital 3,184,779 20.3 % 1,252,479 8.0 % 1,565,598 10.0 % Tier 1 leverage 3,033,655 11.5 % 1,056,763 4.0 % 1,320,954 5.0 % Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Stifel Bank & Trust Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,044,894 11.1 % $ 424,271 4.5 % $ 612,836 6.5 % Tier 1 capital 1,044,894 11.1 % 565,694 6.0 % 754,259 8.0 % Total capital 1,164,585 12.4 % 754,259 8.0 % 942,824 10.0 % Tier 1 leverage 1,044,894 7.1 % 590,236 4.0 % 737,795 5.0 % Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Stifel Bank Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 280,718 18.5 % $ 68,279 4.5 % $ 98,625 6.5 % Tier 1 capital 280,718 18.5 % 91,039 6.0 % 121,385 8.0 % Total capital 291,823 19.2 % 121,385 8.0 % 151,731 10.0 % Tier 1 leverage 280,718 7.3 % 154,213 4.0 % 192,766 5.0 %

Operating Leases

Operating Leases	3 Months Ended
	Mar. 31, 2021
Lessee Disclosure [Abstract]
Operating Leases	NOTE 16 – Operating Leases Our operating leases primarily relate to office space and office equipment with remaining lease terms of 1 to 15 years. At March 31, 2021 and December 31, 2020, operating lease right-of-use assets were $774.8 million and $793.2 million, respectively, and lease liabilities were $822.8 million and $839.8 million, respectively, included in accounts payable and accrued expenses in the consolidated statements of financial condition. The table below summarizes our net lease cost for the three months ended March 31, 2021 and 2020 (in thousands) Three Months Ended March 31, 2021 2020 Operating lease cost $ 25,123 $ 24,395 Short-term lease cost 155 476 Variable lease cost 108 15 Sublease income (659 ) (908 ) Net lease cost $ 24,727 $ 23,978 Operating lease costs are included in occupancy and equipment rental in the consolidated statements of operations. The table below summarizes other information related to our operating leases as of and for the three months ended March 31, 2021 (in thousands) Operating lease cash flows $ 22,712 Right-of-use assets obtained in exchange for new operating lease liabilities $ 8,956 Weighted-average remaining lease term 12.1 years Weighted-average discount rate 4.18 % The weighted-average discount rate represents our company’s incremental borrowing rate at the lease inception date. The table below presents information about operating lease liabilities as of March 31, 2021, (in thousands, except percentages) Remainder of 2021 $ 75,086 2022 99,194 2023 97,821 2024 95,917 2025 93,931 Thereafter 600,909 Total undiscounted lease payments 1,062,858 Imputed interest (240,107 ) Total operating lease liabilities $ 822,751

Revenues from Contracts with Cu

Revenues from Contracts with Customers	3 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenues from Contracts with Customers	NOTE 17 – Revenues from Contracts with Customers The following table presents the Company’s total revenues broken out by revenues from contracts with customers and other sources of revenues for the three months ended March 31, 2021 and 2020 (in thousands) Three Months Ended March 31, 2021 2020 Revenues from contracts with customers: Commissions $ 213,614 $ 211,098 Investment banking 339,288 179,468 Asset management and service fees 278,147 237,775 Other 16,882 4,767 Total revenue from contracts with customers 847,931 633,108 Other sources of revenue: Interest 127,540 161,177 Principal transactions 165,006 138,666 Other 8,752 4,440 Total revenues $ 1,149,229 $ 937,391 Revenue from contracts with customers is recognized when, or as, we satisfy our performance obligations by transferring the promised services to the customers. A service is transferred to a customer when, or as, the customer obtains control of that service. A performance obligation may be satisfied over time or at a point in time. Revenue from a performance obligation satisfied over time is recognized by measuring our progress in satisfying the performance obligation in a manner that depicts the transfer of the services to the customer. Revenue from a performance obligation satisfied at a point in time is recognized at the point in time that we determine the customer obtains control over the promised service. The amount of revenue recognized reflects the consideration we expect to be entitled to in exchange for those promised services (i.e., the “transaction price”). In determining the transaction price, we consider multiple factors, including the effects of variable consideration. Variable consideration is included in the transaction price only to the extent it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainties with respect to the amount are resolved. In determining when to include variable consideration in the transaction price, we consider the range of possible outcomes, the predictive value of our past experiences, the time period of when uncertainties expect to be resolved and the amount of consideration that is susceptible to factors outside of our influence, such as market volatility or the judgment and actions of third parties. The following provides detailed information on the recognition of our revenues from contracts with customers: Commissions. We earn commission revenue by executing, settling, and clearing transactions for clients primarily in OTC and listed equity securities, insurance products, and options. Trade execution and clearing and custody services, when provided together, represent a single performance obligation as the services are not separately identifiable in the context of the contract. Commission revenues associated with combined trade execution and clearing and custody services, as well as trade execution services on a standalone basis, are recognized at a point in time on trade-date. Commission revenues are generally paid on settlement date and we record a receivable between trade-date and payment on settlement date. Investment Banking. We provide our clients with a full range of capital markets and financial advisory services. Capital markets services include underwriting and placement agent services in both the equity and debt capital markets, including private equity placements, initial public offerings, follow-on offerings, underwriting and distributing public and private debt. Capital raising revenues are recognized at a point in time on trade-date, as the client obtains the control and benefit of the capital markets offering at that point. Costs associated with capital raising transactions are deferred until the related revenue is recognized or the engagement is otherwise concluded, and are recorded on a gross basis within other operating expenses in the consolidated statements of operations as we are acting as a principal in the arrangement. Any expenses reimbursed by our clients are recognized as investment banking revenues. Revenues from financial advisory services primarily consist of fees generated in connection with merger, acquisition and restructuring transactions. Advisory fees from mergers and acquisitions engagements are recognized at a point in time when the related transaction is completed, as the performance obligation is to successfully broker a specific transaction. Fees received prior to the completion of the transaction are deferred within accounts payable and accrued expenses on the consolidated statements of financial condition. Advisory fees from restructuring engagements are recognized over time using a time elapsed measure of progress as our clients simultaneously receive and consume the benefits of those services as they are provided. A significant portion of the fees we receive for our advisory services are considered variable as they are contingent upon a future event (e.g., completion of a transaction or third party emergence from bankruptcy) and are excluded from the transaction price until the uncertainty associated with the variable consideration is subsequently resolved, which is expected to occur upon achievement of the specified milestone. Payment for advisory services are generally due promptly upon completion of a specified milestone or, for retainer fees, periodically over the course of the engagement. We recognize a receivable between the date of completion of the milestone and payment by the customer. Expenses associated with investment banking advisory engagements are deferred only to the extent they are explicitly reimbursable by the client and the related revenue is recognized at the same time as the associated expense. All other investment banking advisory related expenses, including expenses incurred related to restructuring assignments, are expensed as incurred. All investment banking advisory expenses are recognized within other operating expenses on the consolidated statements of operations and any expenses reimbursed by our clients are recognized as investment banking revenues. Asset Management Fees. We earn management and performance fees in connection with investment advisory services provided to institutional and individual clients. Investment advisory fees are charged based on the value of assets in fee-based accounts and are affected by changes in the balances of client assets due to market fluctuations and levels of net new client assets. Fees are charged either in advance based on fixed rates applied to the value of the customers’ account at the beginning of the period or periodically based on contracted rates and account performance. Contracts can be terminated at any time with no incremental payments due to our company upon termination. If the contract is terminated by the customer fees are prorated for the period and fees charged for the post termination period are refundable to the customer. Disaggregation of Revenue The following tables present the Company’s revenues from contracts with customers by reportable segment disaggregated by major business activity and primary geographic regions for the three months ended March 31, 2021 and 2020 (in thousands) Three Months Ended March 31, 2021 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 147,505 $ 66,109 $ — $ 213,614 Capital raising 13,549 195,257 — 208,806 Advisory fees — 130,482 — 130,482 Investment banking 13,549 325,739 — 339,288 Asset management 278,109 38 — 278,147 Other 14,924 — 1,958 16,882 Total 454,087 391,886 1,958 847,931 Primary Geographic Region: United States 454,087 303,848 1,958 759,893 United Kingdom — 45,391 — 45,391 Canada — 29,746 — 29,746 Other — 12,901 — 12,901 $ 454,087 $ 391,886 $ 1,958 $ 847,931 Three Months Ended March 31, 2020 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 136,897 $ 74,198 $ 3 $ 211,098 Capital raising 10,314 93,082 — 103,396 Advisory fees 19 76,053 — 76,072 Investment banking 10,333 169,135 — 179,468 Asset management 237,760 15 — 237,775 Other 4,001 — 766 4,767 Total 388,991 243,348 769 633,108 Primary Geographic Region: United States 388,991 198,043 769 587,803 United Kingdom — 30,763 — 30,763 Canada — 5,223 — 5,223 Other — 9,319 — 9,319 $ 388,991 $ 243,348 $ 769 $ 633,108 (1) See Note 21 for further break-out of revenues by geography. Information on Remaining Performance Obligations and Revenue Recognized from Past Performance We do not disclose information about remaining performance obligations pertaining to contracts that have an original expected duration of one year or less. The transaction price allocated to remaining unsatisfied or partially unsatisfied performance obligations with an original expected duration exceeding one year was not material at March 31, 2021. Investment banking advisory fees that are contingent upon completion of a specific milestone and fees associated with certain distribution services are also excluded as the fees are considered variable and not included in the transaction price at March 31, 2021. Contract Balances The timing of our revenue recognition may differ from the timing of payment by our customers. We record a receivable when revenue is recognized prior to payment and we have an unconditional right to payment. Alternatively, when payment precedes the provision of the related services, we record deferred revenue until the performance obligations are satisfied. We had receivables related to revenues from contracts with customers of $202.4 million and $148.6 million at March 31, 2021 and December 31, 2020, respectively. We had no significant impairments related to these receivables during the three months ended March 31, 2021. Our deferred revenue primarily relates to retainer fees received in investment banking advisory engagements and investment advisory fees where the performance obligation has not yet been satisfied. Deferred revenue at March 31, 2021 and December 31, 2020 was $20.3 million and $12.1 million, respectively.

Interest Income and Interest Ex

Interest Income and Interest Expense	3 Months Ended
	Mar. 31, 2021
Banking And Thrift Interest [Abstract]
Interest Income and Interest Expense	NOTE 18 – Interest Income and Interest Expense The components of interest income and interest expense are as follows (in thousands) Three Months Ended March 31, 2021 2020 Interest income: Loans held for investment, net $ 87,239 $ 95,120 Investment securities 29,952 48,137 Margin balances 6,091 10,131 Financial instruments owned 2,895 4,574 Other 1,363 3,215 $ 127,540 $ 161,177 Interest expense: Senior notes $ 12,103 $ 11,193 Bank deposits 1,283 9,569 Federal Home Loan Bank advances 11 2,353 Other 1,043 1,242 $ 14,440 $ 24,357

Employee Incentive, Deferred Co

Employee Incentive, Deferred Compensation, And Retirement Plans	3 Months Ended
	Mar. 31, 2021
Share Based Compensation Allocation And Classification In Financial Statements [Abstract]
Employee Incentive, Deferred Compensation, and Retirement Plans	NOTE 19 – Employee Incentive, Deferred Compensation, and Retirement Plans We maintain an incentive stock plan and a wealth accumulation plan (“the Plan”) that provides for the granting of stock options, stock appreciation rights, restricted stock, performance awards, stock units, and debentures (collectively, “deferred awards”) to our associates. We are permitted to issue new shares under all stock award plans approved by shareholders or to reissue our treasury shares. Stock awards issued under our company’s incentive stock plan are granted at market value at the date of grant. Our deferred awards generally vest ratably over a one- to ten-year Our stock-based compensation plans are administered by the Compensation Committee of the Board of Directors (“Compensation Committee”), which has the authority to interpret the plans, determine to whom awards may be granted under the plans, and determine the terms of each award. According to the incentive stock plan, we are authorized to grant an additional 8.3 million shares at March 31, 2021. Expense associated with our stock-based compensation, included in compensation and benefits expense in the consolidated statements of operations for our company’s incentive stock award plan was $42.4 million and $37.0 million for the three months ended March 31, 2021 and 2020, respectively. Deferred Awards A restricted stock unit represents the right to receive a share of the Company’s common stock at a designated time in the future without cash payment by the employee and is issued in lieu of cash incentive, principally for deferred compensation and employee retention plans. The restricted stock units vest on an annual basis over the next one to ten years and are distributable, if vested, at future specified dates. Restricted stock awards are restricted as to sale or disposition. These restrictions lapse over the next one to five years. Our company grants Performance-based Restricted Stock Units (“PRSUs”) to certain of its executive officers. Under the terms of the grants, the number of PRSUs that will vest and convert to shares will be based on the Company's achievement of the pre-determined performance objectives during the performance period. The PRSUs will be measured over a four-year five-year At March 31, 2021, there was unrecognized compensation cost for deferred awards of approximately $666.1 million, which is expected to be recognized over a weighted-average period of 2.8 years. Deferred Compensation Plans The Plan is provided to certain revenue producers, officers, and key administrative associates, whereby a certain percentage of their incentive compensation is deferred as defined by the Plan into company stock units, restricted stock, and debentures. Participants may elect to defer a portion of their incentive compensation. Deferred awards generally vest over a one- to ten-year Additionally, the Plan allows Stifel’s financial advisors who achieve certain levels of production the option to defer a certain percentage of their gross commissions. As stipulated by the Plan, the financial advisors will defer 5% of their gross commissions. The mandatory deferral is split between company restricted stock units and debentures. They have the option to defer an additional 1% of gross commissions into company stock units. In addition, certain financial advisors, upon joining our company, may receive company stock units in lieu of transition cash payments. Deferred compensation related to these awards generally vests over a one- to eight-year Profit Sharing Plan Eligible U.S. associates of our company who have met certain service requirements may participate in the Stifel Financial Corp. Profit Sharing 401(k) Plan (the “401(k) Plan”). Associates are permitted within limitations imposed by tax law to make pre-tax contributions to the 401(k) Plan. We may match certain associate contributions or make additional contributions to the 401(k) Plan at our discretion. Our contributions to the 401(k) Plan were $3.8 million and $3.5 million for the three months ended March 31, 2021 and 2020, respectively.

Off-Balance Sheet Credit Risk

Off-Balance Sheet Credit Risk	3 Months Ended
	Mar. 31, 2021
Concentration Risks Types No Concentration Percentage [Abstract]
Off-Balance Sheet Credit Risk	NOTE 20 – Off-Balance Sheet Credit Risk In the normal course of business, we execute, settle, and finance customer and proprietary securities transactions. These activities expose our company to off-balance sheet risk in the event that customers or other parties fail to satisfy their obligations. In accordance with industry practice, securities transactions generally settle within two business days after trade date. Should a customer or broker fail to deliver cash or securities as agreed, we may be required to purchase or sell securities at unfavorable market prices. We borrow and lend securities to facilitate the settlement process and finance transactions, utilizing customer margin securities held as collateral. We monitor the adequacy of collateral levels on a daily basis. We periodically borrow from banks on a collateralized basis, utilizing firm and customer margin securities in compliance with SEC rules. Should the counterparty fail to return customer securities pledged, we are subject to the risk of acquiring the securities at prevailing market prices in order to satisfy our customer obligations. We control our exposure to credit risk by continually monitoring our counterparties’ positions, and where deemed necessary, we may require a deposit of additional collateral and/or a reduction or diversification of positions. Our company sells securities it does not currently own (short sales) and is obligated to subsequently purchase such securities at prevailing market prices. We are exposed to risk of loss if securities prices increase prior to closing the transactions. We control our exposure to price risk from short sales through daily review and setting position and trading limits. We manage our risks associated with the aforementioned transactions through position and credit limits and the continuous monitoring of collateral. Additional collateral is required from customers and other counterparties when appropriate. We have accepted collateral in connection with resale agreements, securities borrowed transactions, and customer margin loans. Under many agreements, we are permitted to sell or repledge these securities held as collateral and use these securities to enter into securities lending arrangements or to deliver to counterparties to cover short positions. At March 31, 2021 and December 31, 2020, the fair value of securities accepted as collateral where we are permitted to sell or repledge the securities was $2.2 billion and $1.8 billion, respectively, and the fair value of the collateral that had been sold or repledged was $208.2 million and $191.0 million, respectively. We enter into interest rate derivative contracts 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. Our derivative financial instruments are principally used to manage differences in the amount, timing, and duration of our known or expected cash payments related to certain variable-rate affiliated deposits. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for us making fixed-rate payments. Our interest rate hedging strategies may not work in all market environments and, as a result, may not be effective in mitigating interest rate risk. Derivatives’ notional contract amounts are not reflected as assets or liabilities in the consolidated statements of financial condition. Rather, the market or fair value of the derivative transactions are reported in the consolidated statements of financial condition as other assets or accounts payable and accrued expenses, as applicable. As of March 31, 2021, derivative balances were immaterial. In the ordinary course of business, Stifel Bancorp has commitments to originate loans, standby letters of credit, and lines of credit. Commitments to originate loans are agreements to lend to a customer as long as there is no violation of any condition established by the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash commitments. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if necessary, is based on the credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, commercial real estate, and residential real estate. At March 31, 2021 and December 31, 2020, Stifel Bancorp had outstanding commitments to originate loans aggregating $840.4 million and $889.0 million, respectively. The commitments extended over varying periods of time, with all commitments at March 31, 2021, scheduled to be disbursed in the following three months. Through Stifel Bancorp, in the normal course of business, we originate residential mortgage loans and sell them to investors. We may be required to repurchase mortgage loans that have been sold to investors in the event there are breaches of certain representations and warranties contained within the sales agreements. We may be required to repurchase mortgage loans that were sold to investors in the event that there was inadequate underwriting or fraud, or in the event that the loans become delinquent shortly after they are originated. We also may be required to indemnify certain purchasers and others against losses they incur in the event of breaches of representations and warranties and in various other circumstances, and the amount of such losses could exceed the repurchase amount of the related loans. Consequently, we may be exposed to credit risk associated with sold loans. Standby letters of credit are irrevocable conditional commitments issued by Stifel Bancorp to guarantee the performance of a customer to a third party. Financial standby letters of credit are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing, and similar transactions. Performance standby letters of credit are issued to guarantee performance of certain customers under non-financial contractual obligations. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loans to customers. Should Stifel Bancorp be obligated to perform under the standby letters of credit, it may seek recourse from the customer for reimbursement of amounts paid. At March 31, 2021 and December 31, 2020, Stifel Bancorp had outstanding letters of credit totaling $26.3 million and $31.8 million, respectively. A majority of the standby letters of credit commitments at March 31, 2021, have expiration terms that are less than one year. Lines of credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Lines of credit generally have fixed expiration dates. Stifel Bancorp uses the same credit policies in granting lines of credit as it does for on-balance sheet instruments. At March 31, 2021 and December 31, 2020, Stifel Bancorp had granted unused lines of credit to commercial and consumer borrowers aggregating $2.8 billion and $2.5 billion, respectively. We are required to evaluate our loan portfolio for any expected losses with recognition of an allowance for credit losses, when applicable. At March 31, 2021, the expected credit losses for unfunded lending commitments was $21.4 million.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Segment Reporting	NOTE 21 – Segment Reporting We currently operate through the following three business segments: Global Wealth Management, Institutional Group, and various corporate activities combined in the Other segment. Our Global Wealth Management segment consists of two businesses, the Private Client Group and Stifel Bancorp. The Private Client Group includes branch offices and independent contractor offices of our broker-dealer subsidiaries located throughout the United States. These branches provide securities brokerage services, including the sale of equities, mutual funds, fixed income products, and insurance, as well as offering banking products to their clients through our bank subsidiaries, which provide residential, consumer, and commercial lending, as well as FDIC-insured deposit accounts to customers of our private client group and to the general public. The Institutional Group segment includes institutional sales and trading. It provides securities brokerage, trading, and research services to institutions, with an emphasis on the sale of equity and fixed income products. This segment also includes the management of and participation in underwritings for both corporate and public finance (exclusive of sales credits generated through the private client group, which are included in the Global Wealth Management segment), merger and acquisition, and financial advisory services. The Other segment includes interest income from stock borrow activities, unallocated interest expense, interest income and gains and losses from investments held, amortization of stock-based awards, and all unallocated overhead cost associated with the execution of orders; processing of securities transactions; custody of client securities; receipt, identification, and delivery of funds and securities; compliance with regulatory and legal requirements; internal financial accounting and controls; and general administration and acquisition charges. Information concerning operations in these segments of business for the three months ended March 31, 2021 and 2020 is as follows (in thousands) Three Months Ended March 31, 2021 2020 Net revenues: (1) Global Wealth Management $ 631,495 $ 582,956 Institutional Group 506,081 332,238 Other (2,787 ) (2,160 ) $ 1,134,789 $ 913,034 Income/(loss) before income taxes: Global Wealth Management $ 223,231 $ 194,167 Institutional Group 117,188 41,740 Other (112,527 ) (120,801 ) $ 227,892 $ 115,106 (1) No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2021 or 2020. The following table presents our company’s total assets on a segment basis at March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 December 31, 2020 Global Wealth Management $ 23,560,912 $ 21,743,202 Institutional Group 3,996,969 3,733,661 Other 583,700 1,127,391 $ 28,141,581 $ 26,604,254 We have operations in the United States, United Kingdom, Europe, and Canada. The Company’s foreign operations are conducted through its wholly owned subsidiaries, SNEL and SNC. Substantially all long-lived assets are located in the United States. Revenues, classified by the major geographic areas in which they are earned for the three months ended March 31, 2021 and 2020, were as follows (in thousands) Three Months Ended March 31, 2021 2020 United States $ 1,015,895 $ 860,132 United Kingdom 61,218 37,738 Canada 42,356 3,543 Other 15,320 11,621 $ 1,134,789 $ 913,034

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 22 – Earnings Per Share (“EPS”) Basic EPS is computed by dividing earnings available to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. Diluted earnings per share include dilutive stock options and stock units under the treasury stock method. The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2021 and 2020 (in thousands, except per share data) Three Months Ended March 31, 2021 2020 Net income $ 173,015 $ 86,589 Preferred dividends 8,289 4,844 Net income available to common shareholders $ 164,726 $ 81,745 Shares for basic and diluted calculation: Average shares used in basic computation 107,746 106,929 Dilutive effect of stock options and units (1) 10,129 8,000 Average shares used in diluted computation 117,875 114,929 Earnings per common share: Basic $ 1.53 $ 0.76 Diluted $ 1.40 $ 0.71 (1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. For the three months ended March 31, 2021 and 2020, the anti-dilutive effect from restricted stock units was immaterial. Cash Dividends During the three months ended March 31, 2021, we declared and paid cash dividends of $0.15 per common share. During the three months ended March 31, 2020, we declared and paid cash dividends of $0.11 per common share.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Shareholders' Equity	NOTE 23 – Shareholders’ Equity Share Repurchase Program We have an ongoing authorization from the Board of Directors to repurchase our common stock in the open market or in negotiated transactions. At March 31, 2021, the maximum number of shares that may yet be purchased under this plan was 13.0 million. The repurchase program has no expiration date. These purchases may be made on the open market or in privately negotiated transactions, depending upon market conditions and other factors. Repurchased shares may be used to meet obligations under our company’s employee benefit plans and for general corporate purposes. During the three months ended March 31, 2021, we repurchased $12.7 million or 0.2 million shares using existing Board authorizations at an average price of $61.91 per share to meet obligations under our company’s employee benefit plans and for general corporate purposes. During the three months ended March 31, 2020, we repurchased $56.2 million, or 1.7 million shares using existing Board authorizations at an average price of $33.16 per share to meet obligations under our company’s employee benefit plans and for general corporate purposes. Issuance of Common Stock During the three months ended March 31, 2021, we issued 2.3 million shares, which were primarily reissued from treasury. Share issuances were primarily a result of the vesting and conversion transactions under our incentive stock award plans. Issuance of Preferred Stock On May 19, 2020, the Company issued $225.0 million of 6.125% Non-Cumulative Perpetual Preferred Stock, Series C, $1.00 par value, with a liquidation preference of $25,000 per share (equivalent to $25 liquidation preference per depositary share), which included the sale of $25.0 million of Series C Preferred, pursuant to the over-allotment option. When, as, and if declared by the board of directors of the Company, dividends will be payable at an annual rate of 6.125%, payable quarterly, in arrears. The Company may redeem the Series C preferred stock at its option, subject to regulatory approval, on or after June 15, 2025. On February 21, 2019, the Company issued $150.0 million of 6.25% Non-Cumulative Perpetual Preferred Stock, Series B, $1.00 par value, with a liquidation preference of $25,000 per share (equivalent to $25 liquidation preference per depositary share). In March 2019, the Company completed a public offering of an additional $10.0 million of Series B Preferred, pursuant to the over-allotment option. When, as, and if declared by the board of directors of the Company, dividends will be payable at an annual rate of 6.25%, payable quarterly, in arrears. The Company may redeem the Series B preferred stock at its option, subject to regulatory approval, on or after March 15, 2024.

Variable Interest Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2021
Variable Interest Entity Not Primary Beneficiary Disclosures [Abstract]
Variable Interest Entities	NOTE 24 – Variable Interest Entities Our company’s involvement with VIEs is limited to entities used as investment vehicles and private equity funds, the establishment of Stifel Financial Capital Trusts, and our issuance of a convertible promissory note. We have formed several non-consolidated investment funds with third-party investors that are typically organized as limited liability companies (“LLCs”) or limited partnerships. These partnerships and LLCs have assets of $330.3 million at March 31, 2021. For those funds where we act as the general partner, our company’s economic interest is generally limited to management fee arrangements as stipulated by the fund operating agreements. We have generally provided the third-party investors with rights to terminate the funds or to remove us as the general partner. Management fee revenue earned by our company was insignificant during the three months ended March 31, 2021 and 2020. In addition, our direct investment interest in these entities is insignificant at March 31, 2021. For the entities noted above that were determined to be VIEs, we have concluded that we are not the primary beneficiary, and therefore, we are not required to consolidate these entities. Debenture to Stifel Financial Capital Trusts We have completed private placements of cumulative trust preferred securities through Stifel Financial Capital Trust II, Stifel Financial Capital Trust III, and Stifel Financial Capital Trust IV (collectively, the “Trusts”). The Trusts are non-consolidated wholly owned business trust subsidiaries of our company and were established for the limited purpose of issuing trust securities to third parties and lending the proceeds to our company. The trust preferred securities represent an indirect interest in junior subordinated debentures purchased from our company by the Trusts, and we effectively provide for the full and unconditional guarantee of the securities issued by the Trusts. We make timely payments of interest to the Trusts as required by contractual obligations, which are sufficient to cover payments due on the securities issued by the Trusts, and believe that it is unlikely that any circumstances would occur that would make it necessary for our company to make payments related to these Trusts other than those required under the terms of the debenture agreements and the trust preferred securities agreements. The Trusts were determined to be VIEs because the holders of the equity investment at risk do not have adequate decision-making ability over the Trust’s activities. Our investment in the Trusts is not a variable interest, because equity interests are variable interests only to the extent that the investment is considered to be at risk. Because our investment was funded by the Trusts, it is not considered to be at risk.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	NOTE 25 – Subsequent Events We evaluate subsequent events that have occurred after the balance sheet date but before the financial statements are issued. There are two types of subsequent events: (1) recognized, or those that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements, and (2) non-recognized, or those that provide evidence about conditions that did not exist at the date of the balance sheet but arose after that date. Based on the evaluation, we did not identify any recognized subsequent events that would have required adjustment to the consolidated financial statements.

Nature of Operations, Basis o_2

Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature Of Operations	Nature of Operations Stifel Financial Corp. (the “Company”), through its wholly owned subsidiaries, is principally engaged in retail brokerage; securities trading; investment banking; investment advisory; retail, consumer, and commercial banking; and related financial services. Our major geographic area of concentration is throughout the United States, with a growing presence in the United Kingdom, Europe, and Canada. Our company’s principal customers are individual investors, corporations, municipalities, and institutions.
Basis Of Presentation	Basis of Presentation The consolidated financial statements include Stifel Financial Corp. and its wholly owned subsidiaries, principally Stifel, Nicolaus & Company, Incorporated (“Stifel”), Keefe, Bruyette & Woods, Inc., Stifel Bancorp, Inc. (“Stifel Bancorp”), Stifel Nicolaus Canada Inc. (“SNC”), and Stifel Nicolaus Europe Limited (“SNEL”). Unless otherwise indicated, the terms “we,” “us,” “our,” or “our company” in this report refer to Stifel Financial Corp. and its wholly owned subsidiaries. We have prepared the accompanying unaudited consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Pursuant to these rules and regulations, we have omitted certain information and footnote disclosures we normally include in our annual consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles. In management’s opinion, we have made all adjustments (consisting only of normal, recurring adjustments, except as otherwise noted) necessary to fairly present our financial position, results of operations and cash flows. Our interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. These financial statements and accompanying notes should be read in conjunction with the consolidated financial statements and the notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2020 on file with the SEC. On November 11, 2020, our Board approved a 50% stock dividend, in the form of a three-for-two Certain amounts from prior periods have been reclassified to conform to the current period’s presentation. The effect of these reclassifications on our company’s previously reported consolidated financial statements was not material.
Consolidation Policies	Consolidation Policies The consolidated financial statements include the accounts of Stifel Financial Corp. and its subsidiaries. All material intercompany balances and transactions have been eliminated in consolidation. We have investments or interests in other entities for which we must evaluate whether to consolidate by determining whether we have a controlling financial interest or are considered to be the primary beneficiary. Under our current consolidation policy, which complies with the provisions of ASC 810 as amended by ASU 2015-02, we consolidate those entities where we have the power to direct the activities of the entity that most significantly impact the entity’s economic performance and the obligation to absorb losses of the entity or the rights to receive benefits from the entity that could potentially be significant to the entity. We determine whether we are the primary beneficiary of a variable interest entity (“VIE”) by performing an analysis of the VIE’s control structure, expected benefits and losses, and expected residual returns. This analysis includes a review of, among other factors, the VIE’s capital structure, contractual terms, which interests create or absorb benefits or losses, variability, related party relationships, and the design of the VIE. We reassess our evaluation of whether an entity is a VIE when certain reconsideration events occur. We reassess our determination of whether we are the primary beneficiary of a VIE on an ongoing basis based on current facts and circumstances. See Note 24 for additional information on VIEs.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance Income Taxes In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which is intended to simplify various aspects related to accounting for income taxes. This accounting update removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. We prospectively adopted the accounting update on January 1, 2021. The adoption did not have a material impact on our consolidated financial statements.
Revenue Recognition	Commissions. We earn commission revenue by executing, settling, and clearing transactions for clients primarily in OTC and listed equity securities, insurance products, and options. Trade execution and clearing and custody services, when provided together, represent a single performance obligation as the services are not separately identifiable in the context of the contract. Commission revenues associated with combined trade execution and clearing and custody services, as well as trade execution services on a standalone basis, are recognized at a point in time on trade-date. Commission revenues are generally paid on settlement date and we record a receivable between trade-date and payment on settlement date. Investment Banking. We provide our clients with a full range of capital markets and financial advisory services. Capital markets services include underwriting and placement agent services in both the equity and debt capital markets, including private equity placements, initial public offerings, follow-on offerings, underwriting and distributing public and private debt. Capital raising revenues are recognized at a point in time on trade-date, as the client obtains the control and benefit of the capital markets offering at that point. Costs associated with capital raising transactions are deferred until the related revenue is recognized or the engagement is otherwise concluded, and are recorded on a gross basis within other operating expenses in the consolidated statements of operations as we are acting as a principal in the arrangement. Any expenses reimbursed by our clients are recognized as investment banking revenues. Revenues from financial advisory services primarily consist of fees generated in connection with merger, acquisition and restructuring transactions. Advisory fees from mergers and acquisitions engagements are recognized at a point in time when the related transaction is completed, as the performance obligation is to successfully broker a specific transaction. Fees received prior to the completion of the transaction are deferred within accounts payable and accrued expenses on the consolidated statements of financial condition. Advisory fees from restructuring engagements are recognized over time using a time elapsed measure of progress as our clients simultaneously receive and consume the benefits of those services as they are provided. A significant portion of the fees we receive for our advisory services are considered variable as they are contingent upon a future event (e.g., completion of a transaction or third party emergence from bankruptcy) and are excluded from the transaction price until the uncertainty associated with the variable consideration is subsequently resolved, which is expected to occur upon achievement of the specified milestone. Payment for advisory services are generally due promptly upon completion of a specified milestone or, for retainer fees, periodically over the course of the engagement. We recognize a receivable between the date of completion of the milestone and payment by the customer. Expenses associated with investment banking advisory engagements are deferred only to the extent they are explicitly reimbursable by the client and the related revenue is recognized at the same time as the associated expense. All other investment banking advisory related expenses, including expenses incurred related to restructuring assignments, are expensed as incurred. All investment banking advisory expenses are recognized within other operating expenses on the consolidated statements of operations and any expenses reimbursed by our clients are recognized as investment banking revenues. Asset Management Fees. We earn management and performance fees in connection with investment advisory services provided to institutional and individual clients. Investment advisory fees are charged based on the value of assets in fee-based accounts and are affected by changes in the balances of client assets due to market fluctuations and levels of net new client assets. Fees are charged either in advance based on fixed rates applied to the value of the customers’ account at the beginning of the period or periodically based on contracted rates and account performance. Contracts can be terminated at any time with no incremental payments due to our company upon termination. If the contract is terminated by the customer fees are prorated for the period and fees charged for the post termination period are refundable to the customer.

Receivables From And Payables_2

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Tables)	3 Months Ended
	Mar. 31, 2021
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Amounts Receivable From Brokers, Dealers, And Clearing Organizations	Amounts receivable from brokers, dealers, and clearing organizations at March 31, 2021 and December 31, 2020, included (in thousands) March 31, 2021 December 31, 2020 Deposits paid for securities borrowed $ 285,662 $ 313,131 Receivables from clearing organizations 242,807 229,070 Securities failed to deliver 33,963 7,291 $ 562,432 $ 549,492
Amounts Payable To Brokers, Dealers, And Clearing Organizations	Amounts payable to brokers, dealers, and clearing organizations at March 31, 2021 and December 31, 2020, included (in thousands) March 31, 2021 December 31, 2020 Deposits received from securities loaned $ 231,700 $ 145,124 Payable to clearing organizations 42,245 25,540 Securities failed to receive 34,992 7,273 $ 308,937 $ 177,937

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value	March 31, 2021 December 31, 2020 Fair value of investments Unfunded commitments Fair value of investments Unfunded commitments Money market funds $ 22,590 $ — $ 34,192 $ — Mutual funds 6,422 — 7,152 — Partnership interests 4,129 2,139 3,744 2,520 Private equity funds 2,002 1,203 1,489 1,203 Total $ 35,143 $ 3,342 $ 46,577 $ 3,723
Fair Value Of Assets And Liabilities Measured On Recurring Basis	March 31, 2021 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 61,918 $ 61,918 $ — $ — U.S. government agency securities 166,501 — 166,501 — Agency mortgage-backed securities 254,203 — 254,203 — Corporate securities: Fixed income securities 223,545 220 223,325 — Equity securities 82,402 71,714 10,688 — State and municipal securities 162,083 — 162,083 — Other (1) 30,630 — 16,353 14,277 Total financial instruments owned 981,282 133,852 833,153 14,277 Available-for-sale securities: U.S. government agency securities 3,645 — 3,645 — State and municipal securities 2,428 — 2,428 — Mortgage-backed securities: Agency 1,003,691 — 1,003,691 — Commercial 87,439 — 87,439 — Non-agency 3,658 — 3,658 — Corporate fixed income securities 711,559 — 711,559 — Asset-backed securities 377,708 — 377,708 — Total available-for-sale securities 2,190,128 — 2,190,128 — Investments: Corporate equity securities 35,518 33,517 1 2,000 Auction rate securities 12,959 — — 12,959 Other 58,515 10,349 6,338 41,828 Investments in funds and partnerships measured at NAV 12,553 Total investments 119,545 43,866 6,339 56,787 Cash equivalents measured at NAV 22,590 $ 3,313,545 $ 177,718 $ 3,029,620 $ 71,064 (1) Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities. March 31, 2021 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 287,820 $ 287,820 $ — $ — Agency mortgage-backed securities 121,648 — 121,648 — Corporate securities: Fixed income securities 185,728 680 185,048 — Equity securities 34,443 34,443 — — Other (2) 15,123 — 15,123 — Total financial instruments sold, but not yet purchased $ 644,762 $ 322,943 $ 321,819 $ — (2) Includes U.S. government agency securities, sovereign debt, and state and municipal securities. Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020, are presented below (in thousands) December 31, 2020 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 46,900 $ 46,900 $ — $ — U.S. government agency securities 56,450 — 56,450 — Agency mortgage-backed securities 216,434 — 216,434 — Corporate securities: Fixed income securities 194,575 4,474 190,101 — Equity securities 67,593 62,979 4,614 — State and municipal securities 96,150 — 96,150 — Other (1) 15,926 — 4,642 11,284 Total financial instruments owned 694,028 114,353 568,391 11,284 Available-for-sale securities: U.S. government agency securities 4,361 — 4,361 — State and municipal securities 2,453 — 2,453 — Mortgage-backed securities: Agency 793,410 — 793,410 — Commercial 95,613 — 95,613 — Non-agency 4,569 — 4,569 — Corporate fixed income securities 631,758 — 631,758 — Asset-backed securities 698,133 — 698,133 — Total available-for-sale securities 2,230,297 — 2,230,297 — Investments: Corporate equity securities 29,496 29,496 — — Auction rate securities 12,933 — — 12,933 Other 59,048 10,342 6,593 42,113 Investments in funds and partnerships measured at NAV 12,385 Total investments 113,862 39,838 6,593 55,046 Cash equivalents measured at NAV 34,192 $ 3,072,379 $ 154,191 $ 2,805,281 $ 66,330 (1) Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities. December 31, 2020 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 91,974 $ 91,974 $ — $ — Agency mortgage-backed securities 141,227 — 141,227 — Corporate securities: Fixed income securities 162,626 4,094 158,532 — Equity securities 30,848 30,848 — — Other (2) 11,303 — 11,303 — Total financial instruments sold, but not yet purchased $ 437,978 $ 126,916 $ 311,062 $ —
Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments	The following table summarizes the changes in fair value associated with Level 3 financial instruments during the three months ended March 31, 2021 (in thousands) Three Months Ended March 31, 2021 Financial instruments owned Investments Other Corporate Equity Securities Auction Securities Other Balance at December 31, 2020 $ 11,284 $ — $ 12,933 $ 42,113 Unrealized gains/(losses) (21 ) — 26 (285 ) Purchases 3,014 2,000 — — Net change 2,993 2,000 26 (285 ) Balance at March 31, 2021 $ 14,277 $ 2,000 $ 12,959 $ 41,828
Schedule Of Fair Value Of Financial Instruments	March 31, 2021 December 31, 2020 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 1,425,511 $ 1,425,511 $ 2,279,274 $ 2,279,274 Cash segregated for regulatory purposes 95,074 95,074 172,932 172,932 Securities purchased under agreements to resell 470,025 470,025 217,930 217,930 Financial instruments owned 981,282 981,282 694,028 694,028 Available-for-sale securities 2,190,128 2,190,128 2,230,297 2,230,297 Held-to-maturity securities 4,761,401 4,765,024 4,117,384 4,107,960 Bank loans 12,091,713 12,168,119 11,006,760 11,088,058 Loans held for sale 330,521 330,521 551,248 551,248 Investments 119,545 119,545 113,862 113,862 Financial liabilities: Securities sold under agreements to repurchase $ 208,228 $ 208,228 $ 190,955 $ 190,955 Bank deposits 18,715,133 18,527,784 17,396,497 17,192,722 Financial instruments sold, but not yet purchased 644,762 644,762 437,978 437,978 Senior notes 1,112,672 1,228,983 1,112,409 1,265,669 Debentures to Stifel Financial Capital Trusts 60,000 46,444 60,000 41,071
Estimated Fair Values Of Financial Instruments Not Measured At Fair Value	March 31, 2021 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,402,921 $ 1,402,921 $ — $ — Cash segregated for regulatory purposes 95,074 95,074 — — Securities purchased under agreements to resell 470,025 424,621 45,404 — Held-to-maturity securities 4,765,024 — 4,598,600 166,424 Bank loans 12,168,119 — 12,168,119 — Loans held for sale 330,521 — 330,521 — Financial liabilities: Securities sold under agreements to repurchase $ 208,228 $ — $ 208,228 $ — Bank deposits 18,527,784 — 18,527,784 — Senior notes 1,228,983 1,228,983 — — Debentures to Stifel Financial Capital Trusts 46,444 — — 46,444 December 31, 2020 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 2,245,082 $ 2,245,082 $ — $ — Cash segregated for regulatory purposes 172,932 172,932 — — Securities purchased under agreements to resell 217,930 164,094 53,836 — Held-to-maturity securities 4,107,960 — 3,943,944 164,016 Bank loans 11,088,058 — 11,088,058 — Loans held for sale 551,248 — 551,248 — Financial liabilities: Securities sold under agreements to repurchase $ 190,955 $ — $ 190,955 $ — Bank deposits 17,192,722 — 17,192,722 — Senior notes 1,265,669 1,265,669 — — Debentures to Stifel Financial Capital Trusts 41,071 — — 41,071

Financial Instruments Owned A_2

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables)	3 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased	The components of financial instruments owned and financial instruments sold, but not yet purchased, at March 31, 2021 and December 31, 2020 are as follows (in thousands) March 31, 2021 December 31, 2020 Financial instruments owned: U.S. government securities $ 61,918 $ 46,900 U.S. government agency securities 166,501 56,450 Agency mortgage-backed securities 254,203 216,434 Corporate securities: Fixed income securities 223,545 194,575 Equity securities 82,402 67,593 State and municipal securities 162,083 96,150 Other (1) 30,630 15,926 $ 981,282 $ 694,028 Financial instruments sold, but not yet purchased: U.S. government securities $ 287,820 $ 91,974 Agency mortgage-backed securities 121,648 141,227 Corporate securities: Fixed income securities 185,728 162,626 Equity securities 34,443 30,848 Other (2) 15,123 11,303 $ 644,762 $ 437,978 (1) Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities. (2) Includes U.S. government agency securities, sovereign debt, and state and municipal securities.

Available-For-Sale And Held-T_2

Available-For-Sale And Held-To-Maturity Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Schedule Of Amortized Cost And Fair Values Of Available For Sale Securities And Held To Maturity Securities	The following tables provide a summary of the amortized cost and fair values of the available-for-sale securities and held-to-maturity securities at March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 3,595 $ 50 $ — $ 3,645 State and municipal securities 2,389 39 — 2,428 Mortgage-backed securities: Agency 997,913 14,592 (8,814 ) 1,003,691 Commercial 84,555 2,914 (30 ) 87,439 Non-agency 3,648 10 — 3,658 Corporate fixed income securities 695,698 19,702 (3,841 ) 711,559 Asset-backed securities 378,201 3,493 (3,986 ) 377,708 $ 2,165,999 $ 40,800 $ (16,671 ) $ 2,190,128 Held-to-maturity securities (2) Asset-backed securities $ 4,761,401 $ 10,044 $ (6,421 ) $ 4,765,024 December 31, 2020 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,293 $ 68 $ — $ 4,361 State and municipal securities 2,395 58 — 2,453 Mortgage-backed securities: Agency 777,025 16,401 (16 ) 793,410 Commercial 91,237 4,376 — 95,613 Non-agency 4,550 28 (9 ) 4,569 Corporate fixed income securities 604,662 27,096 — 631,758 Asset-backed securities 700,177 3,522 (5,566 ) 698,133 $ 2,184,339 $ 51,549 $ (5,591 ) $ 2,230,297 Held-to-maturity securities (2) Asset-backed securities $ 4,117,384 $ 8,111 $ (17,535 ) $ 4,107,960 (1) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss. (2) Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.
Schedule Of Amortized Cost And Fair Values Of Debt Securities By Contractual Maturity	The table below summarizes the amortized cost and fair values of our securities by contractual maturity at March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 December 31, 2020 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Available-for-sale securities Within one year $ 133,899 $ 134,463 $ 143,462 $ 144,362 After one year through three years 121,840 124,825 134,040 137,625 After three years through five years 242,071 254,774 247,907 266,139 After five years through ten years 348,662 350,871 429,921 435,111 After ten years 1,319,527 1,325,195 1,229,009 1,247,060 $ 2,165,999 $ 2,190,128 $ 2,184,339 $ 2,230,297 Held-to-maturity securities After three years through five years $ 1,623 $ 1,623 $ 17,460 $ 17,460 After five years through ten years 2,157,703 2,155,117 1,932,439 1,926,425 After ten years 2,602,075 2,608,284 2,167,485 2,164,075 $ 4,761,401 $ 4,765,024 $ 4,117,384 $ 4,107,960
Contractual Maturities	The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at March 31, 2021, are as follows ( in thousands Within 1 Year 1-5 Years 5-10 Years After 10 Years Total Available-for-sale securities (1) U.S. government agency securities $ 2,522 $ 1,123 $ — $ — $ 3,645 State and municipal securities — — 2,428 — 2,428 Mortgage-backed securities: Agency 11 272 78,213 925,195 1,003,691 Commercial 10,416 10 — 77,013 87,439 Non-agency 2,970 — — 688 3,658 Corporate fixed income securities 118,544 378,194 214,821 — 711,559 Asset-backed securities — — 55,409 322,299 377,708 $ 134,463 $ 379,599 $ 350,871 $ 1,325,195 $ 2,190,128 Held-to-maturity securities Asset-backed securities $ — $ 1,623 $ 2,157,703 $ 2,602,075 $ 4,761,401 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time	The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at March 31, 2021 (in thousands) Less than 12 months 12 months or more Total Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Available-for-sale securities Mortgage-backed securities: Agency $ (8,814 ) $ 489,231 $ — $ — $ (8,814 ) $ 489,231 Commercial (30 ) 10,416 — — (30 ) 10,416 Corporate fixed income securities (3,841 ) 143,201 — — (3,841 ) 143,201 Asset-backed securities (1,267 ) 43,136 (2,719 ) 150,571 (3,986 ) 193,707 $ (13,952 ) $ 685,984 $ (2,719 ) $ 150,571 $ (16,671 ) $ 836,555
Schedule Of Amortized Cost Of Held-To-Maturity Securities By Credit Quality Indicator	The following table shows the amortized cost of our held-to-maturity securities by credit quality indicator at March 31, 2021 (in thousands) AAA AA A C Total Held-to-maturity securities Asset-backed securities $ 1,280,256 $ 3,445,799 $ 32,855 $ 2,491 $ 4,761,401

Bank Loans (Tables)

Bank Loans (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio	March 31, 2021 December 31, 2020 Balance Percent Balance Percent Commercial and industrial $ 4,923,494 40.3 % $ 4,296,089 38.5 % Residential real estate 4,158,033 34.0 3,956,670 35.4 Securities-based loans 2,089,747 17.1 1,933,974 17.3 Construction and land 560,191 4.6 501,681 4.5 Commercial real estate 374,736 3.1 366,485 3.3 Home equity lines of credit 71,172 0.6 75,507 0.7 Other 37,819 0.3 40,407 0.3 Gross bank loans 12,215,192 100.0 % 11,170,813 100.0 % Unamortized loan discount, net (1,695 ) (1,822 ) Loans in process (13,012 ) (48,222 ) Unamortized loan fees, net (1,104 ) (1,980 ) Allowance for loan losses (107,668 ) (112,029 ) Loans held for investment, net $ 12,091,713 $ 11,006,760
Activity In The Allowance For Loan Losses By Portfolio Segment	Three Months Ended March 31, 2021 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 67,222 $ (9,972 ) $ (934 ) $ — $ 56,316 Construction and land 17,275 1,598 — — 18,873 Residential real estate 16,300 365 — — 16,665 Commercial real estate 8,580 4,480 — — 13,060 Securities-based loans 2,015 154 — — 2,169 Home equity lines of credit 374 (33 ) — — 341 Other 263 (19 ) — — 244 $ 112,029 $ (3,427 ) $ (934 ) $ — $ 107,668 Three Months Ended March 31, 2020 Beginning Balance CECL Adoption Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 69,949 $ (19,940 ) $ 9,955 $ (2 ) $ — $ 59,962 Residential real estate 14,253 3,499 2,233 — — 19,985 Construction and land 4,613 2,674 3,666 — — 10,953 Commercial real estate 3,564 791 3,810 — — 8,165 Securities-based loans 2,361 1,346 (792 ) — — 2,915 Home equity lines of credit 442 39 57 — 1 539 Other 397 (145 ) 49 (18 ) — 283 $ 95,579 $ (11,736 ) $ 18,978 $ (20 ) $ 1 $ 102,802
Aging Of The Recorded Investment In Past Due Loans	As of March 31, 2021 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Commercial and industrial $ — $ 11,408 $ 11,408 $ 4,912,086 $ 4,923,494 Residential real estate 3,941 1,925 5,866 4,152,167 4,158,033 Securities-based loans — — — 2,089,747 2,089,747 Construction and land — — — 560,191 560,191 Commercial real estate — 144 144 374,592 374,736 Home equity lines of credit 233 — 233 70,939 71,172 Other 17 — 17 37,802 37,819 Total $ 4,191 $ 13,477 $ 17,668 $ 12,197,524 $ 12,215,192 As of March 31, 2021* Non-Accrual Restructured Nonperforming loans with no allowance Total Commercial and industrial $ 11,408 $ — $ — $ 11,408 Residential real estate 676 158 1,249 2,083 Commercial real estate 144 — — 144 Total $ 12,228 $ 158 $ 1,249 $ 13,635 * There were no loans past due 90 days and still accruing interest at March 31, 2021. As of December 31, 2020 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ 14 $ 12,237 $ 12,251 $ 4,283,838 $ 4,296,089 Residential real estate 4,554 1,249 5,803 3,950,867 3,956,670 Securities-based loans — — — 1,933,974 1,933,974 Construction and land — — — 501,681 501,681 Commercial real estate — 144 144 366,341 366,485 Home equity lines of credit 12 — 12 75,495 75,507 Other 31 — 31 40,376 40,407 Total $ 4,611 $ 13,630 $ 18,241 $ 11,152,572 $ 11,170,813 As of December 31, 2020* Non-Accrual Restructured Nonperforming loans with no allowance Total Commercial and industrial $ 12,251 $ — $ — $ 12,251 Residential real estate — 158 1,249 1,407 Commercial real estate 144 — — 144 Total $ 12,395 $ 158 $ 1,249 $ 13,802 * There were no loans past due 90 days and still accruing interest at December 31, 2020.
Risk Category Of Loan Portfolio	As of March 31, 2021 Pass Special Substandard Doubtful Total Commercial and industrial $ 4,607,280 $ 164,839 $ 139,967 $ 11,408 $ 4,923,494 Residential real estate 4,155,773 335 — 1,925 4,158,033 Securities-based loans 2,089,747 — — — 2,089,747 Construction and land 525,951 14,240 20,000 — 560,191 Commercial real estate 366,154 5,802 2,636 144 374,736 Home equity lines of credit 71,172 — — — 71,172 Other 37,819 — — — 37,819 Total $ 11,853,896 $ 185,216 $ 162,603 $ 13,477 $ 12,215,192 As of December 31, 2020 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,995,351 $ 105,759 $ 182,728 $ 12,251 $ 4,296,089 Residential real estate 3,955,421 — — 1,249 3,956,670 Securities-based loans 1,933,974 — — — 1,933,974 Construction and land 467,441 14,240 20,000 — 501,681 Commercial real estate 356,008 10,333 — 144 366,485 Home equity lines of credit 75,507 — — — 75,507 Other 40,407 — — — 40,407 Total $ 10,824,109 $ 130,332 $ 202,728 $ 13,644 $ 11,170,813
Schedule of Term Loans Amortized Cost Basis by Origination Year and Revolving Cost Amortized Cost Basis	Term Loans Amortized Cost Basis by Origination Year – March 31, 2021 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total Commercial and industrial: Pass $ 852,103 $ 494,747 $ 527,136 $ 679,772 $ 302,188 $ 502,085 $ 1,249,249 $ 4,607,280 Special Mention — 503 30,309 82,558 45,947 4,200 1,322 164,839 Substandard — — 23,921 43,195 63,558 7,762 1,531 139,967 Doubtful — — — — 11,394 14 — 11,408 $ 852,103 $ 495,250 $ 581,366 $ 805,525 $ 423,087 $ 514,061 $ 1,252,102 $ 4,923,494 Residential real estate: Pass $ 485,925 $ 1,548,638 $ 815,040 $ 340,371 $ 271,808 $ 693,991 $ — $ 4,155,773 Special Mention — — — — — 335 — 335 Substandard — — — — — — — — Doubtful — — — — 825 1,100 — 1,925 $ 485,925 $ 1,548,638 $ 815,040 $ 340,371 $ 272,633 $ 695,426 $ — $ 4,158,033 Securities-based loans: Pass $ 973 $ 38,702 $ 102,973 $ 294 $ 140 $ 16,906 $ 1,929,759 $ 2,089,747 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ 973 $ 38,702 $ 102,973 $ 294 $ 140 $ 16,906 $ 1,929,759 $ 2,089,747 Construction and land: Pass $ 13,842 $ 87,316 $ 218,904 $ 128,179 $ 62,248 $ 6,401 $ 9,061 $ 525,951 Special Mention — — — 14,240 — — — 14,240 Substandard — — — 20,000 — — — 20,000 Doubtful — — — — — — — — $ 13,842 $ 87,316 $ 218,904 $ 162,419 $ 62,248 $ 6,401 $ 9,061 $ 560,191 Commercial real estate: Pass $ 22,047 $ 81,378 $ 152,732 $ 25,328 $ 38,352 $ 45,975 $ 342 $ 366,154 Special Mention — — — — — 5,802 — 5,802 Substandard — — — — — 2,636 — 2,636 Doubtful — — — 144 — — — 144 $ 22,047 $ 81,378 $ 152,732 $ 25,472 $ 38,352 $ 54,413 $ 342 $ 374,736 Home equity lines of credit: Pass $ — $ — $ — $ — $ — $ — $ 71,172 $ 71,172 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ — $ — $ — $ — $ 71,172 $ 71,172 Other: Pass $ — $ — $ — $ 4 $ — $ 445 $ 37,370 $ 37,819 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ — $ 4 $ — $ 445 $ 37,370 $ 37,819

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying Amount of Goodwill and Intangible Assets	The carrying amount of goodwill and intangible assets attributable to each of our reporting segments is presented in the following table (in thousands) December 31, 2020 Adjustments Write-off March 31, 2021 Goodwill Global Wealth Management $ 335,009 $ — $ — $ 335,009 Institutional Group 846,989 315 — 847,304 $ 1,181,998 $ 315 $ — $ 1,182,313 December 31, 2020 Adjustments Amortization March 31, 2021 Intangible assets Global Wealth Management $ 44,671 $ — $ (1,305 ) $ 43,366 Institutional Group 96,313 60 (2,963 ) 93,410 $ 140,984 $ 60 $ (4,268 ) $ 136,776
Intangible Assets	Intangible assets as of March 31, 2021 and December 31, 2020 were as follows (in thousands) March 31, 2021 December 31, 2020 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 202,424 $ 87,941 $ 202,342 $ 85,152 Trade names 28,659 16,097 28,659 15,660 Non-compete agreements 9,240 4,586 9,240 4,229 Core deposits 8,615 5,210 8,615 4,809 Investment banking backlog 4,245 2,970 4,245 2,734 Acquired technology 840 443 840 373 $ 254,023 $ 117,247 $ 253,941 $ 112,957
Amortization Expense in Future Periods	As of March 31, 2021, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2021 $ 13,554 2022 16,454 2023 14,601 2024 13,888 2025 11,841 Thereafter 64,320 $ 134,658

Senior Notes (Tables)

Senior Notes (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Summary of Senior Notes	The following table summarizes our senior notes as of March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 December 31, 2020 4.25% senior notes, due 2024 (1) $ 500,000 $ 500,000 4.00% senior notes, due 2030 (2) 400,000 400,000 5.20% senior notes, due 2047 (3) 225,000 225,000 1,125,000 1,125,000 Debt issuance costs, net (12,328 ) (12,591 ) Senior notes, net $ 1,112,672 $ 1,112,409 (1) In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.25% senior notes due July 2024 (2) In May 2020, we sold in a registered underwritten public offering, $400.0 million in aggregate principal amount of 4.00% senior notes due May 2030 (3) October 2047
Schedule of Corporate Date Maturity	Our senior notes mature as follows, based upon contractual terms (in thousands) 2021 $ — 2022 — 2023 — 2024 500,000 2025 — Thereafter 625,000 $ 1,125,000

Bank Deposits (Tables)

Bank Deposits (Tables)	3 Months Ended
	Mar. 31, 2021
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Schedule of Deposits	Deposits consist of interest-bearing-demand deposits (primarily money market and savings accounts), non-interest-bearing demand deposits, and certificates of deposit. Deposits at March 31, 2021 and December 31, 2020 were as follows (in thousands) March 31, 2021 December 31, 2020 Demand deposits (interest-bearing) $ 18,125,863 $ 16,886,953 Demand deposits (non-interest-bearing) 524,338 411,890 Certificates of deposit 64,932 97,654 $ 18,715,133 $ 17,396,497
Schedule of Maturities of Certificates of Deposit	Scheduled maturities of certificates of deposit at March 31, 2021 and December 31, 2020 were as follows (in thousands): March 31, 2021 December 31, 2020 Certificates of deposit, less than $100,000: Within one year $ 2,222 $ 2,719 One to three years 263 409 Three to five years 54 254 $ 2,539 $ 3,382 Certificates of deposit, $100,000 and greater: Within one year $ 35,419 $ 63,650 One to three years 26,874 30,622 Three to five years 100 — 62,393 94,272 $ 64,932 $ 97,654

Disclosures About Offsetting _2

Disclosures About Offsetting Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2021
Offsetting [Abstract]
Financial Assets and Derivative Assets that are Subject to Offset	The following tables provide information about financial assets that are subject to offset as of March 31, 2021 and December 31, 2020 (in thousands) As of March 31, 2021 Securities borrowing (1) Reverse repurchase agreements (2) Total Gross amounts of recognized assets $ 285,662 $ 470,025 $ 755,687 Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition 285,662 470,025 755,687 Gross amounts not offset in the statement of financial condition: Amounts available for offset (51,786 ) (22,733 ) (74,519 ) Available collateral (226,199 ) (445,144 ) (671,343 ) Net amount $ 7,677 $ 2,148 $ 9,825 As of December 31, 2020 Securities borrowing (1) Reverse repurchase agreements (2) Total Gross amounts of recognized assets $ 313,131 $ 217,930 $ 531,061 Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition 313,131 217,930 531,061 Gross amounts not offset in the statement of financial condition: Amounts available for offset (46,183 ) (17,992 ) (64,175 ) Available collateral (244,578 ) (199,110 ) (443,688 ) Net amount $ 22,370 $ 828 $ 23,198 (1) Securities borrowing transactions are included in receivables from brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 3 in the notes to consolidated financial statements for additional information on receivables from brokers, dealers, and clearing organizations. (2) Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $467.9 million and $217.3 million at March 31, 2021 and December 31, 2020, respectively.
Financial Liabilities and Derivative Liabilities that are Subject to Offset	The following tables provide information about financial liabilities that are subject to offset as of March 31, 2021 and December 31, 2020 (in thousands) As of March 31, 2021 Securities lending (3) Repurchase agreements (4) Total Gross amounts of recognized liabilities $ (231,700 ) $ (208,228 ) $ (439,928 ) Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition (231,700 ) (208,228 ) (439,928 ) Gross amounts not offset in the statement of financial condition: Amounts available for offset 51,786 22,733 74,519 Collateral pledged 178,055 185,495 363,550 Net amount $ (1,859 ) $ — $ (1,859 ) As of December 31, 2020 Securities lending (3) Repurchase agreements (4) Total Gross amounts of recognized liabilities $ (145,124 ) $ (190,955 ) $ (336,079 ) Gross amounts offset in the statement of financial condition — — — Net amounts presented in the statement of financial condition (145,124 ) (190,955 ) (336,079 ) Gross amounts not offset in the statement of financial condition: Amounts available for offset 46,183 17,992 64,175 Collateral pledged 98,925 172,963 271,888 Net amount $ (16 ) $ — $ (16 ) (3) Securities lending transactions are included in payables to brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 3 in the notes to consolidated financial statements for additional information on payables to brokers, dealers, and clearing organizations. (4) Collateral pledged includes the fair value of securities pledged by our company to the counterparty. These securities are included in the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counterparty includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $218.1 million and $200.2 million at March 31, 2021 and December 31, 2020, respectively.

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	3 Months Ended
	Mar. 31, 2021
Regulatory Capital Requirements [Abstract]
Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios	Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Stifel Financial Corp. Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 2,498,655 16.0 % $ 704,519 4.5 % $ 1,017,639 6.5 % Tier 1 capital 3,033,655 19.4 % 939,359 6.0 % 1,252,479 8.0 % Total capital 3,184,779 20.3 % 1,252,479 8.0 % 1,565,598 10.0 % Tier 1 leverage 3,033,655 11.5 % 1,056,763 4.0 % 1,320,954 5.0 % Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Stifel Bank & Trust Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,044,894 11.1 % $ 424,271 4.5 % $ 612,836 6.5 % Tier 1 capital 1,044,894 11.1 % 565,694 6.0 % 754,259 8.0 % Total capital 1,164,585 12.4 % 754,259 8.0 % 942,824 10.0 % Tier 1 leverage 1,044,894 7.1 % 590,236 4.0 % 737,795 5.0 % Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Stifel Bank Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 280,718 18.5 % $ 68,279 4.5 % $ 98,625 6.5 % Tier 1 capital 280,718 18.5 % 91,039 6.0 % 121,385 8.0 % Total capital 291,823 19.2 % 121,385 8.0 % 151,731 10.0 % Tier 1 leverage 280,718 7.3 % 154,213 4.0 % 192,766 5.0 %

Operating Leases (Tables)

Operating Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Lessee Disclosure [Abstract]
Schedule of Net Lease Cost	The table below summarizes our net lease cost for the three months ended March 31, 2021 and 2020 (in thousands) Three Months Ended March 31, 2021 2020 Operating lease cost $ 25,123 $ 24,395 Short-term lease cost 155 476 Variable lease cost 108 15 Sublease income (659 ) (908 ) Net lease cost $ 24,727 $ 23,978 The table below summarizes other information related to our operating leases as of and for the three months ended March 31, 2021 (in thousands) Operating lease cash flows $ 22,712 Right-of-use assets obtained in exchange for new operating lease liabilities $ 8,956 Weighted-average remaining lease term 12.1 years Weighted-average discount rate 4.18 %
Schedule of Information About Operating Lease Liabilities	The table below presents information about operating lease liabilities as of March 31, 2021, (in thousands, except percentages) Remainder of 2021 $ 75,086 2022 99,194 2023 97,821 2024 95,917 2025 93,931 Thereafter 600,909 Total undiscounted lease payments 1,062,858 Imputed interest (240,107 ) Total operating lease liabilities $ 822,751

Revenues from Contracts with _2

Revenues from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Schedule of Total Revenues Separated between Revenues from Contracts with Customers and Other Sources of Revenues	The following table presents the Company’s total revenues broken out by revenues from contracts with customers and other sources of revenues for the three months ended March 31, 2021 and 2020 (in thousands) Three Months Ended March 31, 2021 2020 Revenues from contracts with customers: Commissions $ 213,614 $ 211,098 Investment banking 339,288 179,468 Asset management and service fees 278,147 237,775 Other 16,882 4,767 Total revenue from contracts with customers 847,931 633,108 Other sources of revenue: Interest 127,540 161,177 Principal transactions 165,006 138,666 Other 8,752 4,440 Total revenues $ 1,149,229 $ 937,391
Revenues from Contracts with Customers Disaggregated by Major Business Activity and Primary Geographic Regions	The following tables present the Company’s revenues from contracts with customers by reportable segment disaggregated by major business activity and primary geographic regions for the three months ended March 31, 2021 and 2020 (in thousands) Three Months Ended March 31, 2021 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 147,505 $ 66,109 $ — $ 213,614 Capital raising 13,549 195,257 — 208,806 Advisory fees — 130,482 — 130,482 Investment banking 13,549 325,739 — 339,288 Asset management 278,109 38 — 278,147 Other 14,924 — 1,958 16,882 Total 454,087 391,886 1,958 847,931 Primary Geographic Region: United States 454,087 303,848 1,958 759,893 United Kingdom — 45,391 — 45,391 Canada — 29,746 — 29,746 Other — 12,901 — 12,901 $ 454,087 $ 391,886 $ 1,958 $ 847,931 Three Months Ended March 31, 2020 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 136,897 $ 74,198 $ 3 $ 211,098 Capital raising 10,314 93,082 — 103,396 Advisory fees 19 76,053 — 76,072 Investment banking 10,333 169,135 — 179,468 Asset management 237,760 15 — 237,775 Other 4,001 — 766 4,767 Total 388,991 243,348 769 633,108 Primary Geographic Region: United States 388,991 198,043 769 587,803 United Kingdom — 30,763 — 30,763 Canada — 5,223 — 5,223 Other — 9,319 — 9,319 $ 388,991 $ 243,348 $ 769 $ 633,108 (1)

Interest Income and Interest _2

Interest Income and Interest Expense (Tables)	3 Months Ended
	Mar. 31, 2021
Banking And Thrift Interest [Abstract]
Components of Interest Income and Interest Expense	The components of interest income and interest expense are as follows (in thousands) Three Months Ended March 31, 2021 2020 Interest income: Loans held for investment, net $ 87,239 $ 95,120 Investment securities 29,952 48,137 Margin balances 6,091 10,131 Financial instruments owned 2,895 4,574 Other 1,363 3,215 $ 127,540 $ 161,177 Interest expense: Senior notes $ 12,103 $ 11,193 Bank deposits 1,283 9,569 Federal Home Loan Bank advances 11 2,353 Other 1,043 1,242 $ 14,440 $ 24,357

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule Of Operating Information, Segment	Information concerning operations in these segments of business for the three months ended March 31, 2021 and 2020 is as follows (in thousands) Three Months Ended March 31, 2021 2020 Net revenues: (1) Global Wealth Management $ 631,495 $ 582,956 Institutional Group 506,081 332,238 Other (2,787 ) (2,160 ) $ 1,134,789 $ 913,034 Income/(loss) before income taxes: Global Wealth Management $ 223,231 $ 194,167 Institutional Group 117,188 41,740 Other (112,527 ) (120,801 ) $ 227,892 $ 115,106 (1) No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2021 or 2020.
Schedule Of Information Of Total Assets On Segment Basis	The following table presents our company’s total assets on a segment basis at March 31, 2021 and December 31, 2020 (in thousands) March 31, 2021 December 31, 2020 Global Wealth Management $ 23,560,912 $ 21,743,202 Institutional Group 3,996,969 3,733,661 Other 583,700 1,127,391 $ 28,141,581 $ 26,604,254
Schedule Of Net Revenues Earned On Major Geographical Areas	Revenues, classified by the major geographic areas in which they are earned for the three months ended March 31, 2021 and 2020, were as follows (in thousands) Three Months Ended March 31, 2021 2020 United States $ 1,015,895 $ 860,132 United Kingdom 61,218 37,738 Canada 42,356 3,543 Other 15,320 11,621 $ 1,134,789 $ 913,034

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2021 and 2020 (in thousands, except per share data) Three Months Ended March 31, 2021 2020 Net income $ 173,015 $ 86,589 Preferred dividends 8,289 4,844 Net income available to common shareholders $ 164,726 $ 81,745 Shares for basic and diluted calculation: Average shares used in basic computation 107,746 106,929 Dilutive effect of stock options and units (1) 10,129 8,000 Average shares used in diluted computation 117,875 114,929 Earnings per common share: Basic $ 1.53 $ 0.76 Diluted $ 1.40 $ 0.71 (1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method.

Nature of Operations And Basis

Nature of Operations And Basis of Presentation (Details)	Nov. 11, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Stock Dividend	50.00%
Stock split description	On November 11, 2020, our Board approved a 50% stock dividend, in the form of a three-for-two stock split, of our common stock payable on December 16, 2020, to shareholders of record as of December 2, 2020. All share and per share information has been retroactively adjusted to reflect the stock split.
Stock split, conversion ratio	1.5

Receivables From And Payables_3

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Receivable From Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Deposits paid for securities borrowed	$ 285,662	$ 313,131
Receivables from clearing organizations	242,807	229,070
Securities failed to deliver	33,963	7,291
Receivables from brokers, dealers and clearing organizations, Total	$ 562,432	$ 549,492

Receivables From And Payables_4

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Payable To Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Deposits received from securities loaned	$ 231,700	$ 145,124
Payable to clearing organizations	42,245	25,540
Securities failed to receive	34,992	7,273
Payables to broker, dealers and clearing organizations, Total	$ 308,937	$ 177,937

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 35,143	$ 46,577
Unfunded commitments	3,342	3,723
Money Market Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	22,590	34,192
Mutual Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	6,422	7,152
Partnership Interests [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	4,129	3,744
Unfunded commitments	2,139	2,520
Private Equity Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	2,002	1,489
Unfunded commitments	$ 1,203	$ 1,203

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		$ 981,282	$ 694,028
Available-for-sale securities		2,190,128	2,230,297
Investments		119,545	113,862
Cash equivalents measured at NAV		22,590	34,192
Total Assets		3,313,545	3,072,379
Financial instruments sold, but not yet purchased, at fair value		644,762	437,978
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		61,918	46,900
Financial instruments sold, but not yet purchased, at fair value		287,820	91,974
U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		166,501	56,450
Available-for-sale securities		3,645	4,361
Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		223,545	194,575
Available-for-sale securities		711,559	631,758
Financial instruments sold, but not yet purchased, at fair value		185,728	162,626
Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		82,402	67,593
Investments		35,518	29,496
Financial instruments sold, but not yet purchased, at fair value		34,443	30,848
State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		162,083	96,150
Available-for-sale securities		2,428	2,453
Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		377,708	698,133
Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		58,515	59,048
Investments in Funds and Partnerships Measured at NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		12,553	12,385
Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		254,203
Agency Mortgage-Backed Securities [Member] | Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned			216,434
Available-for-sale securities		1,003,691	793,410
Financial instruments sold, but not yet purchased, at fair value		121,648	141,227
Agency Mortgage-Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		87,439	95,613
Agency Mortgage-Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		3,658	4,569
Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	[1]	30,630	15,926
Financial instruments sold, but not yet purchased, at fair value	[2]	15,123	11,303
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		133,852	114,353
Investments		43,866	39,838
Total Assets		177,718	154,191
Financial instruments sold, but not yet purchased, at fair value		322,943	126,916
Level 1 [Member] | U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		61,918	46,900
Financial instruments sold, but not yet purchased, at fair value		287,820	91,974
Level 1 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		220	4,474
Financial instruments sold, but not yet purchased, at fair value		680	4,094
Level 1 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		71,714	62,979
Investments		33,517	29,496
Financial instruments sold, but not yet purchased, at fair value		34,443	30,848
Level 1 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		10,349	10,342
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		833,153	568,391
Available-for-sale securities		2,190,128	2,230,297
Investments		6,339	6,593
Total Assets		3,029,620	2,805,281
Financial instruments sold, but not yet purchased, at fair value		321,819	311,062
Level 2 [Member] | U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		166,501	56,450
Available-for-sale securities		3,645	4,361
Level 2 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		223,325	190,101
Available-for-sale securities		711,559	631,758
Financial instruments sold, but not yet purchased, at fair value		185,048	158,532
Level 2 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		10,688	4,614
Investments		1
Level 2 [Member] | State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		162,083	96,150
Available-for-sale securities		2,428	2,453
Level 2 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		377,708	698,133
Level 2 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		6,338	6,593
Level 2 [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		254,203
Level 2 [Member] | Agency Mortgage-Backed Securities [Member] | Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned			216,434
Available-for-sale securities		1,003,691	793,410
Financial instruments sold, but not yet purchased, at fair value		121,648	141,227
Level 2 [Member] | Agency Mortgage-Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		87,439	95,613
Level 2 [Member] | Agency Mortgage-Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		3,658	4,569
Level 2 [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	[1]	16,353	4,642
Financial instruments sold, but not yet purchased, at fair value	[2]	15,123	11,303
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		14,277	11,284
Investments		56,787	55,046
Total Assets		71,064	66,330
Level 3 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		2,000
Level 3 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		41,828	42,113
Level 3 [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	[1]	$ 14,277	$ 11,284
[1]	Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities.
[2]	Includes U.S. government agency securities, sovereign debt, and state and municipal securities.

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)
Other financial instrument owned [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 11,284
Unrealized gains/(losses)	(21)
Purchases	3,014
Net change	2,993
Ending Balance	14,277
Corporate Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	2,000
Net change	2,000
Ending Balance	2,000
Equity Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	12,933
Unrealized gains/(losses)	26
Net change	26
Ending Balance	12,959
Other Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	42,113
Unrealized gains/(losses)	(285)
Net change	(285)
Ending Balance	$ 41,828

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities purchased under agreements to resell	$ 470,025	$ 217,930
Financial instruments owned	981,282	694,028
Available-for-sale securities	2,190,128	2,230,297
Held-to-maturity securities	4,765,024	4,107,960
Securities sold under agreements to repurchase	208,228	190,955
Financial instruments sold, but not yet purchased, at fair value	644,762	437,978
Senior notes	1,112,672	1,112,409
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,425,511	2,279,274
Cash segregated for regulatory purposes	95,074	172,932
Securities purchased under agreements to resell	470,025	217,930
Financial instruments owned	981,282	694,028
Available-for-sale securities	2,190,128	2,230,297
Held-to-maturity securities	4,761,401	4,117,384
Bank loans	12,091,713	11,006,760
Loans held for sale	330,521	551,248
Investments	119,545	113,862
Securities sold under agreements to repurchase	208,228	190,955
Bank deposits	18,715,133	17,396,497
Financial instruments sold, but not yet purchased, at fair value	644,762	437,978
Senior notes	1,112,672	1,112,409
Debentures to Stifel Financial Capital Trusts	60,000	60,000
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,425,511	2,279,274
Cash segregated for regulatory purposes	95,074	172,932
Securities purchased under agreements to resell	470,025	217,930
Financial instruments owned	981,282	694,028
Available-for-sale securities	2,190,128	2,230,297
Held-to-maturity securities	4,765,024	4,107,960
Bank loans	12,168,119	11,088,058
Loans held for sale	330,521	551,248
Investments	119,545	113,862
Securities sold under agreements to repurchase	208,228	190,955
Bank deposits	18,527,784	17,192,722
Financial instruments sold, but not yet purchased, at fair value	644,762	437,978
Senior notes	1,228,983	1,265,669
Debentures to Stifel Financial Capital Trusts	$ 46,444	$ 41,071

Fair Value Of Financial Instr_5

Fair Value Of Financial Instruments (Estimated Fair Values Of Financial Instruments Not Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	$ 470,025	$ 217,930
Held-to-maturity securities	4,765,024	4,107,960
Securities sold under agreements to repurchase	208,228	190,955
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	1,402,921	2,245,082
Cash segregated for regulatory purposes	95,074	172,932
Securities purchased under agreements to resell	470,025	217,930
Held-to-maturity securities	4,765,024	4,107,960
Bank loans	12,168,119	11,088,058
Loans held for sale	330,521	551,248
Securities sold under agreements to repurchase	208,228	190,955
Bank deposits	18,527,784	17,192,722
Senior notes	1,228,983	1,265,669
Debentures to Stifel Financial Capital Trusts	46,444	41,071
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	1,402,921	2,245,082
Cash segregated for regulatory purposes	95,074	172,932
Securities purchased under agreements to resell	424,621	164,094
Senior notes	1,228,983	1,265,669
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	45,404	53,836
Held-to-maturity securities	4,598,600	3,943,944
Bank loans	12,168,119	11,088,058
Loans held for sale	330,521	551,248
Securities sold under agreements to repurchase	208,228	190,955
Bank deposits	18,527,784	17,192,722
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities	166,424	164,016
Debentures to Stifel Financial Capital Trusts	$ 46,444	$ 41,071

Financial Instruments Owned A_3

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		$ 981,282	$ 694,028
U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		166,501	56,450
Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		223,545	194,575
Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		82,402	67,593
State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		162,083	96,150
U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		61,918	46,900
Securities Sold, But Not yet Purchased [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value		644,762	437,978
Other	[1]	15,123	11,303
Securities Sold, But Not yet Purchased [Member] | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities		185,728	162,626
Securities Sold, But Not yet Purchased [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities		34,443	30,848
Securities Sold, But Not yet Purchased [Member] | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned		287,820	91,974
Securities Sold, But Not yet Purchased [Member] | Agency Mortgage-Backed Securities [Member] | Agency Securities
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned		121,648	141,227
Securities Owned [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Other	[2]	30,630	15,926
Financial instruments owned, at fair value		981,282	694,028
Securities Owned [Member] | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned		166,501	56,450
Securities Owned [Member] | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities		223,545	194,575
Securities Owned [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities		82,402	67,593
Securities Owned [Member] | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities		162,083	96,150
Securities Owned [Member] | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned		61,918	46,900
Securities Owned [Member] | Agency Mortgage-Backed Securities [Member] | Agency Securities
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned		$ 254,203	$ 216,434
[1]	Includes U.S. government agency securities, sovereign debt, and state and municipal securities.
[2]	Includes loans, asset-backed securities, sovereign debt, and non-agency mortgage-backed securities.

Financial Instruments Owned A_4

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 534.8	$ 368.4
Securities Owned [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 180.5	$ 194

Available-For-Sale And Held-T_3

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of The Available For Sale Securities And Held To Maturity Securities) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		$ 2,165,999	$ 2,184,339
Available for sale securities, unrealized gains	[1]	40,800	51,549
Available-for-sale Securities, Gross unrealized losses	[1]	(16,671)	(5,591)
Available-for-sale securities		2,190,128	2,230,297
Held-to-maturity Securities, Amortized cost		4,761,401	4,117,384
Held-to-maturity securities, Estimated fair value		4,765,024	4,107,960
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		3,595	4,293
Available for sale securities, unrealized gains	[1]	50	68
Available-for-sale securities		3,645	4,361
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		2,389	2,395
Available for sale securities, unrealized gains	[1]	39	58
Available-for-sale securities		2,428	2,453
Agency Mortgage-Backed Securities [Member] | Agency Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		997,913	777,025
Available for sale securities, unrealized gains	[1]	14,592	16,401
Available-for-sale Securities, Gross unrealized losses	[1]	(8,814)	(16)
Available-for-sale securities		1,003,691	793,410
Agency Mortgage-Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		84,555	91,237
Available for sale securities, unrealized gains	[1]	2,914	4,376
Available-for-sale Securities, Gross unrealized losses	[1]	(30)
Available-for-sale securities		87,439	95,613
Agency Mortgage-Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		3,648	4,550
Available for sale securities, unrealized gains	[1]	10	28
Available-for-sale Securities, Gross unrealized losses	[1]		(9)
Available-for-sale securities		3,658	4,569
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		695,698	604,662
Available for sale securities, unrealized gains	[1]	19,702	27,096
Available-for-sale Securities, Gross unrealized losses	[1]	(3,841)
Available-for-sale securities		711,559	631,758
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		378,201	700,177
Available for sale securities, unrealized gains	[1]	3,493	3,522
Available-for-sale Securities, Gross unrealized losses	[1]	(3,986)	(5,566)
Available-for-sale securities		377,708	698,133
Held-to-maturity Securities, Amortized cost	[2]	4,761,401	4,117,384
Held-to-maturity Securities, Gross unrealized gains	[2]	10,044	8,111
Held-to-maturity Securities, Gross unrealized losses	[2]	(6,421)	(17,535)
Held-to-maturity securities, Estimated fair value	[2]	$ 4,765,024	$ 4,107,960
[1]	Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_4

Available-For-Sale And Held-To-Maturity Securities (Narrative) (Details)	3 Months Ended
	Mar. 31, 2021USD ($)security	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 21,300,000
Proceeds from sale of available-for-sale securities	0	$ 288,300,000
Net realized gains (loss) resulting from sale of available-for-sale securities		(700,000)
Transfers from available for sale securities to held to maturity	312,900
Gain On Transfer Of securities	0
Unrealized gains (losses) recorded in accumulated other comprehensive loss	22,700,000	$ (73,200,000)
Financial instruments pledged as collateral	$ 534,800,000		$ 368,400,000
Number of available for sale securities whose amortized costs exceeded their fair values | security	45
Available-for-sale Securities, Continuous	$ 16,671,000
Available-for-sale Securities, Continuous Unrealized	2,719,000
Available-for-sale Securities, Continuous	$ 836,555,000
Percentage of available-for-sale portfolio	38.20%
Pledged [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Trading securities pledged	$ 1,000,000,000		$ 1,400,000,000
Other Assets [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 22,500,000

Available-For-Sale And Held-T_5

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of Debt Securities By Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2021		Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Available-for-sale Securities, debt maturities, within one year, Amortized Cost	$ 133,899		$ 143,462
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost	121,840		134,040
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost	242,071		247,907
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost	348,662		429,921
Available-for-sale Securities, debt maturities, after ten years, Amortized Cost	1,319,527		1,229,009
Available-for-sale Securities, debt maturities, Amortized Cost	2,165,999		2,184,339
Available-for-sale Securities, debt maturities, within one year, Fair Value	134,463	[1]	144,362
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value	124,825		137,625
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value	254,774		266,139
Available-for-sale Securities, debt maturities, after five through ten years, fair value	350,871	[1]	435,111
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	1,325,195	[1]	1,247,060
Available-for-sale Securities, debt maturities, Fair Value	2,190,128	[1]	2,230,297
Held-to-maturity Securities, debt maturities, after three through five years, Amortized Cost	1,623		17,460
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost	2,157,703		1,932,439
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost	2,602,075		2,167,485
Held-to-maturity Securities, Amortized cost	4,761,401		4,117,384
Held-to-maturity Securities, debt maturities, after three through five years, Fair Value	1,623		17,460
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value	2,155,117		1,926,425
Held-to-maturity Securities, debt maturities, after ten years, Fair Value	2,608,284		2,164,075
Held-to-maturity Securities, debt maturities, Fair Value	$ 4,765,024		$ 4,107,960
[1]	Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.

Available-For-Sale And Held-T_6

Available-For-Sale And Held-To-Maturity Securities (Contractual Maturities) (Details) - USD ($) $ in Thousands		Mar. 31, 2021		Dec. 31, 2020
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value		$ 134,463	[1]	$ 144,362
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	379,599
Available-for-sale Securities, debt maturities, after five through ten years, fair value		350,871	[1]	435,111
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		1,325,195	[1]	1,247,060
Available-for-sale Securities, debt maturities, Fair Value		2,190,128	[1]	2,230,297
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		2,157,703		1,932,439
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,602,075		2,167,485
Held-to-maturity Securities, Amortized cost		4,761,401		$ 4,117,384
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	2,522
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	1,123
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,645
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	2,428
Available-for-sale Securities, debt maturities, Fair Value	[1]	2,428
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	118,544
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	378,194
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	214,821
Available-for-sale Securities, debt maturities, Fair Value	[1]	711,559
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	55,409
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	322,299
Available-for-sale Securities, debt maturities, Fair Value	[1]	377,708
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		1,623
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		2,157,703
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,602,075
Held-to-maturity Securities, Amortized cost		4,761,401
Agency Mortgage-Backed Securities [Member] | Agency Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	11
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	272
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	78,213
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	925,195
Available-for-sale Securities, debt maturities, Fair Value	[1]	1,003,691
Agency Mortgage-Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1],[2]	10,416
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1],[2]	10
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1],[2]	77,013
Available-for-sale Securities, debt maturities, Fair Value	[1],[2]	87,439
Agency Mortgage-Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	2,970
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	688
Available-for-sale Securities, debt maturities, Fair Value	[1]	$ 3,658
[1]	Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_7

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time In A Loss Position) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	$ (13,952)
Available-for-sale Securities, Estimated fair value, Less than 12 months	685,984
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(2,719)
Available-for-sale Securities, Estimated fair value, 12 months or more	150,571
Available-for-sale Securities, Gross unrealized losses, Total	(16,671)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	836,555
Commercial
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(30)
Available-for-sale Securities, Estimated fair value, Less than 12 months	10,416
Available-for-sale Securities, Gross unrealized losses, Total	(30)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	10,416
Agency Mortgage-Backed Securities [Member] | Agency Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(8,814)
Available-for-sale Securities, Estimated fair value, Less than 12 months	489,231
Available-for-sale Securities, Gross unrealized losses, Total	(8,814)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	489,231
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(3,841)
Available-for-sale Securities, Estimated fair value, Less than 12 months	143,201
Available-for-sale Securities, Gross unrealized losses, Total	(3,841)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	143,201
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(1,267)
Available-for-sale Securities, Estimated fair value, Less than 12 months	43,136
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(2,719)
Available-for-sale Securities, Estimated fair value, 12 months or more	150,571
Available-for-sale Securities, Gross unrealized losses, Total	(3,986)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 193,707

Available-For-Sale And Held-T_8

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost Of Held-To-Maturity Securities By Credit Quality Indicator) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		$ 4,761,401	$ 4,117,384
Asset-Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost	[1]	4,761,401	$ 4,117,384
Asset-Backed Securities [Member] | AAA [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		1,280,256
Asset-Backed Securities [Member] | AA [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		3,445,799
Asset-Backed Securities [Member] | A [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		32,855
Asset-Backed Securities [Member] | C [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		$ 2,491
[1]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Bank Loans (Schedule Of Balance

Bank Loans (Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 12,215,192	$ 11,170,813
Unamortized loan discount, net	(1,695)	(1,822)
Loans in process	(13,012)	(48,222)
Unamortized loan fees, net	(1,104)	(1,980)
Allowance for loan losses	(107,668)	(112,029)	$ (102,802)	$ (95,579)
Loans held for investment, net	$ 12,091,713	$ 11,006,760
Gross bank loans, Percent	100.00%	100.00%
Commercial And Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 4,923,494	$ 4,296,089
Allowance for loan losses	$ (56,316)	$ (67,222)	(59,962)	(69,949)
Gross bank loans, Percent	40.30%	38.50%
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 4,158,033	$ 3,956,670
Allowance for loan losses	$ (16,665)	$ (16,300)	(19,985)	(14,253)
Gross bank loans, Percent	34.00%	35.40%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 374,736	$ 366,485
Allowance for loan losses	$ (13,060)	$ (8,580)	(8,165)	(3,564)
Gross bank loans, Percent	3.10%	3.30%
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 560,191	$ 501,681
Allowance for loan losses	$ (18,873)	$ (17,275)	(10,953)	(4,613)
Gross bank loans, Percent	4.60%	4.50%
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 71,172	$ 75,507
Allowance for loan losses	$ (341)	$ (374)	(539)	(442)
Gross bank loans, Percent	0.60%	0.70%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 37,819	$ 40,407
Allowance for loan losses	$ (244)	$ (263)	(283)	(397)
Gross bank loans, Percent	0.30%	0.30%
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 2,089,747	$ 1,933,974
Allowance for loan losses	$ (2,169)	$ (2,015)	$ (2,915)	$ (2,361)
Gross bank loans, Percent	17.10%	17.30%

Bank Loans (Narrative) (Details

Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 330,521		$ 551,248
Gains (losses) recognized from sale of loans	13,900	$ 2,500
Accrued interest receivable	21,300
Provision for credit losses	(3,427)	$ 18,978
Impaired loans more than 90 days past due	13,600		13,800
Troubled debt restructurings	200		200
Specific allowance	$ 8,200		$ 8,200
Collateralized loan portfolio	98.90%		98.80%
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 330,500		$ 551,200
Unfunded Commitment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for credit losses	1,800
Stifel Bancorp [Member] | Executive Officers and Directors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	25,100		23,600
Stifel Bancorp [Member] | Executive Officers and Directors of Certain Affiliated Entities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 25,100		$ 23,600

Bank Loans (Activity In The All

Bank Loans (Activity In The Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 112,029	$ 95,579
CECL Adoption		(11,736)
Provision	(3,427)	18,978
Charge-offs	(934)	(20)
Recoveries		1
Ending Balance	107,668	102,802
Commercial And Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	67,222	69,949
CECL Adoption		(19,940)
Provision	(9,972)	9,955
Charge-offs	(934)	(2)
Ending Balance	56,316	59,962
Residential Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	16,300	14,253
CECL Adoption		3,499
Provision	365	2,233
Ending Balance	16,665	19,985
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	2,015	2,361
CECL Adoption		1,346
Provision	154	(792)
Ending Balance	2,169	2,915
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	8,580	3,564
CECL Adoption		791
Provision	4,480	3,810
Ending Balance	13,060	8,165
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	17,275	4,613
CECL Adoption		2,674
Provision	1,598	3,666
Ending Balance	18,873	10,953
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	374	442
CECL Adoption		39
Provision	(33)	57
Recoveries		1
Ending Balance	341	539
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	263	397
CECL Adoption		(145)
Provision	(19)	49
Charge-offs		(18)
Ending Balance	$ 244	$ 283

Bank Loans (Aging Of The Record

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($)		Mar. 31, 2021		Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 17,668,000		$ 18,241,000
Current Balance		12,197,524,000		11,152,572,000
Total		12,215,192,000		11,170,813,000
Non-Accrual		12,228,000	[1]	12,395,000
Restructured		158,000	[1]	158,000	[2]
Nonperforming loans with no allowance		1,249,000	[1]	1,249,000	[2]
Total		13,635,000	[1]	13,802,000	[2]
Loans past due 90 days and still accruing interest		0		0
Non-Accrual		12,228,000	[1]	12,395,000
Commercial And Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		11,408,000		12,251,000
Current Balance		4,912,086,000		4,283,838,000
Total		4,923,494,000		4,296,089,000
Non-Accrual		11,408,000	[1]	12,251,000
Total		11,408,000	[1]	12,251,000	[2]
Non-Accrual		11,408,000	[1]	12,251,000
Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		5,866,000		5,803,000
Current Balance		4,152,167,000		3,950,867,000
Total		4,158,033,000		3,956,670,000
Non-Accrual	[1]	676,000
Restructured		158,000	[1]	158,000	[2]
Nonperforming loans with no allowance		1,249,000	[1]	1,249,000	[2]
Total		2,083,000	[1]	1,407,000	[2]
Non-Accrual	[1]	676,000
Securities-Based Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		2,089,747,000		1,933,974,000
Total		2,089,747,000		1,933,974,000
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		144,000		144,000
Current Balance		374,592,000		366,341,000
Total		374,736,000		366,485,000
Non-Accrual		144,000	[1]	144,000
Total		144,000	[1]	144,000	[2]
Non-Accrual		144,000	[1]	144,000
Construction And Land [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		560,191,000		501,681,000
Total		560,191,000		501,681,000
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		233,000		12,000
Current Balance		70,939,000		75,495,000
Total		71,172,000		75,507,000
Other [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		17,000		31,000
Current Balance		37,802,000		40,376,000
Total		37,819,000		40,407,000
30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,191,000		4,611,000
30 - 89 Days Past Due [Member] | Commercial And Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				14,000
30 - 89 Days Past Due [Member] | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		3,941,000		4,554,000
30 - 89 Days Past Due [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		233,000		12,000
30 - 89 Days Past Due [Member] | Other [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		17,000		31,000
90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		13,477,000		13,630,000
90 or More Days Past Due [Member] | Commercial And Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		11,408,000		12,237,000
90 or More Days Past Due [Member] | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,925,000		1,249,000
90 or More Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 144,000		$ 144,000
[1]	There were no loans past due 90 days and still accruing interest at March 31, 2021.
[2]	There were no loans past due 90 days and still accruing interest at December 31, 2020.

Bank Loans (Risk Category Of Lo

Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 12,215,192	$ 11,170,813
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	11,853,896	10,824,109
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	185,216	130,332
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	162,603	202,728
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	13,477	13,644
Commercial And Industrial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	4,923,494	4,296,089
Commercial And Industrial | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	4,607,280	3,995,351
Commercial And Industrial | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	164,839	105,759
Commercial And Industrial | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	139,967	182,728
Commercial And Industrial | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	11,408	12,251
Residential Mortgage
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	4,158,033	3,956,670
Residential Mortgage | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	4,155,773	3,955,421
Residential Mortgage | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	335
Residential Mortgage | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,925	1,249
Securities-Based Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,089,747	1,933,974
Securities-Based Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,089,747	1,933,974
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	374,736	366,485
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	366,154	356,008
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	5,802	10,333
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,636
Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	144	144
Construction And Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	560,191	501,681
Construction And Land [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	525,951	467,441
Construction And Land [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	14,240	14,240
Construction And Land [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	20,000	20,000
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	71,172	75,507
Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	71,172	75,507
Other [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	37,819	40,407
Other [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 37,819	$ 40,407

Bank Loans (Schedule of Term Lo

Bank Loans (Schedule of Term Loans Amortized Cost Basis by Origination Year and Revolving Cost Amortized Cost Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	$ 12,215,192	$ 11,170,813
Commercial And Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4,923,494	4,296,089
Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	852,103
Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	495,250
Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	581,366
Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	805,525
Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	423,087
Commercial And Industrial | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	514,061
Commercial And Industrial | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,252,102
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4,158,033	3,956,670
Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	485,925
Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,548,638
Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	815,040
Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	340,371
Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	272,633
Residential Mortgage | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	695,426
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	2,089,747	1,933,974
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	973
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	38,702
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	102,973
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	294
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	140
Securities-Based Loans [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	16,906
Securities-Based Loans [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,929,759
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	560,191	501,681
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	13,842
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	87,316
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	218,904
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	162,419
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	62,248
Construction And Land [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	6,401
Construction And Land [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	9,061
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	374,736	366,485
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	22,047
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	81,378
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	152,732
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	25,472
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	38,352
Commercial Real Estate [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	54,413
Commercial Real Estate [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	342
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	71,172	75,507
Home Equity Lines Of Credit [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	71,172
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	37,819	40,407
Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4
Other [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	445
Other [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	37,370
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	11,853,896	10,824,109
Pass [Member] | Commercial And Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4,607,280	3,995,351
Pass [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	852,103
Pass [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	494,747
Pass [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	527,136
Pass [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	679,772
Pass [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	302,188
Pass [Member] | Commercial And Industrial | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	502,085
Pass [Member] | Commercial And Industrial | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,249,249
Pass [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4,155,773	3,955,421
Pass [Member] | Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	485,925
Pass [Member] | Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,548,638
Pass [Member] | Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	815,040
Pass [Member] | Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	340,371
Pass [Member] | Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	271,808
Pass [Member] | Residential Mortgage | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	693,991
Pass [Member] | Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	2,089,747	1,933,974
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	973
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	38,702
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	102,973
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	294
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	140
Pass [Member] | Securities-Based Loans [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	16,906
Pass [Member] | Securities-Based Loans [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,929,759
Pass [Member] | Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	525,951	467,441
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	13,842
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	87,316
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	218,904
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	128,179
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	62,248
Pass [Member] | Construction And Land [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	6,401
Pass [Member] | Construction And Land [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	9,061
Pass [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	366,154	356,008
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	22,047
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	81,378
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	152,732
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	25,328
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	38,352
Pass [Member] | Commercial Real Estate [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	45,975
Pass [Member] | Commercial Real Estate [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	342
Pass [Member] | Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	71,172	75,507
Pass [Member] | Home Equity Lines Of Credit [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	71,172
Pass [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	37,819	40,407
Pass [Member] | Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4
Pass [Member] | Other [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	445
Pass [Member] | Other [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	37,370
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	185,216	130,332
Special Mention [Member] | Commercial And Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	164,839	105,759
Special Mention [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	503
Special Mention [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	30,309
Special Mention [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	82,558
Special Mention [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	45,947
Special Mention [Member] | Commercial And Industrial | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4,200
Special Mention [Member] | Commercial And Industrial | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,322
Special Mention [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	335
Special Mention [Member] | Residential Mortgage | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	335
Special Mention [Member] | Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	14,240	14,240
Special Mention [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	14,240
Special Mention [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	5,802	10,333
Special Mention [Member] | Commercial Real Estate [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	5,802
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	162,603	202,728
Substandard [Member] | Commercial And Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	139,967	182,728
Substandard [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	23,921
Substandard [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	43,195
Substandard [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	63,558
Substandard [Member] | Commercial And Industrial | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	7,762
Substandard [Member] | Commercial And Industrial | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,531
Substandard [Member] | Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	20,000	20,000
Substandard [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	20,000
Substandard [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	2,636
Substandard [Member] | Commercial Real Estate [Member] | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	2,636
Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	13,477	13,644
Doubtful [Member] | Commercial And Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	11,408	12,251
Doubtful [Member] | Commercial And Industrial | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	11,394
Doubtful [Member] | Commercial And Industrial | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	14
Doubtful [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,925	1,249
Doubtful [Member] | Residential Mortgage | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	825
Doubtful [Member] | Residential Mortgage | Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,100
Doubtful [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	144	$ 144
Doubtful [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	$ 144

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Carrying Amount of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	$ 1,181,998
Goodwill, Adjustments	315
Goodwill, Ending balance	1,182,313
Intangible assets, Beginning balance	140,984
Intangible assets, Adjustments	60
Intangible assets, Amortization	(4,268)	$ (5,032)
Intangible assets, Ending balance	136,776
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	335,009
Goodwill, Ending balance	335,009
Intangible assets, Beginning balance	44,671
Intangible assets, Amortization	(1,305)
Intangible assets, Ending balance	43,366
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	846,989
Goodwill, Adjustments	315
Goodwill, Ending balance	847,304
Intangible assets, Beginning balance	96,313
Intangible assets, Adjustments	60
Intangible assets, Amortization	(2,963)
Intangible assets, Ending balance	$ 93,410

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Goodwill and Intangible Assets [Line Items]
Amortization of intangible assets	$ 4,268	$ 5,032
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	10 years 3 months 18 days
Trade Name [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	9 years 1 month 6 days
Core Deposits [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	3 years 3 months 18 days
Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	5 years 10 months 24 days
Investment Banking Backlog [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	7 years 10 months 24 days
Acquired Technology [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	1 year 6 months
North Atlantic Capital Corporation [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Date of acquisition	Feb. 28, 2021

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 254,023	$ 253,941
Accumulated Amortization	117,247	112,957
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	202,424	202,342
Accumulated Amortization	87,941	85,152
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	28,659	28,659
Accumulated Amortization	16,097	15,660
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,240	9,240
Accumulated Amortization	4,586	4,229
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,615	8,615
Accumulated Amortization	5,210	4,809
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,245	4,245
Accumulated Amortization	2,970	2,734
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	840	840
Accumulated Amortization	$ 443	$ 373

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Amortization Expense in Future Periods) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2021	$ 13,554
2022	16,454
2023	14,601
2024	13,888
2025	11,841
Thereafter	64,320
Future amortization expense total	$ 134,658

Borrowings and Federal Home L_2

Borrowings and Federal Home Loan Bank Advances (Narrative) (Details)	3 Months Ended
	Mar. 31, 2021USD ($)item
Short-term Debt [Line Items]
Uncommitted secured lines of credit	$ 880,000,000,000
Number of banks | item	4
Daily borrowings under our uncommitted secured lines	$ 50,000,000
Compensating balances	0
Federal Home Loan Bank Advances	0
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	$ 200,000,000
Credit facility expiration date	2024-03
LIBOR rate	1.75%
Outstanding credit facility	$ 0
Stifel Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	$ 300,000,000
Credit facility expiration date	2021-06
Outstanding credit facility	$ 0
Credit agreement maturity days	364 days
Company Owned Securities [Member]
Short-term Debt [Line Items]
Uncommitted secured lines of credit	$ 0
Federal Home Loan Bank advances [Member]
Short-term Debt [Line Items]
Weighted average interest rate on borrowings	0.29%

Senior Notes (Summary of Senior

Senior Notes (Summary of Senior Notes) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020	May 31, 2020	Oct. 31, 2017	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, gross		$ 1,125,000	$ 1,125,000
Debt issuance costs, net		(12,328)	(12,591)
Senior notes, net		1,112,672	1,112,409
Senior notes 4.25% due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[1]	500,000	500,000
Senior notes, net						$ 300,000
Senior notes 4.00% due 2030 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[2]	400,000	400,000
Senior notes, net				$ 400,000
Senior notes 5.20% due 2047 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[3]	$ 225,000	$ 225,000
Senior notes, net					$ 200,000
[1]	In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.25% senior notes due July 2024
[2]	In May 2020, we sold in a registered underwritten public offering, $400.0 million in aggregate principal amount of 4.00% senior notes due May 2030
[3]	In October 2017, we completed the pricing of a registered underwritten public offering of $200.0 million in aggregate principal amount of 5.20% senior notes due October 2047

Senior Notes (Summary of Seni_2

Senior Notes (Summary of Senior Notes) (Parenthetical) (Details) - USD ($) $ in Thousands	Feb. 15, 2030	Oct. 27, 2017	Jul. 31, 2016	Mar. 31, 2021	Dec. 31, 2020	May 31, 2020	Oct. 31, 2017	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt				$ 1,112,672	$ 1,112,409
Senior notes 4.25% due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate				4.25%
Long-term Debt								$ 300,000
Debt instrument, maturity date				Jul. 31, 2024
Redemption price, percentage of principal amount				100.00%
Additional issuance of long-term debt			$ 200,000
Senior notes 4.00% due 2030 [Member]
Debt Instrument [Line Items]
Stated interest rate				4.00%
Long-term Debt						$ 400,000
Debt instrument, maturity date				May 31, 2030
Senior notes 4.00% due 2030 [Member] | After February 15, 2030 [Member]
Debt Instrument [Line Items]
Redemption price, percentage of principal amount				100.00%
Senior notes 4.00% due 2030 [Member] | Measurement Input, Discount Rate [Member] | Prior to February 15, 2030 [Member]
Debt Instrument [Line Items]
Redemption at treasury rate basis point				0.50%
Senior notes 4.00% due 2030 [Member] | Forecast
Debt Instrument [Line Items]
Redemption price, percentage of principal amount	100.00%
Senior notes 5.20% due 2047 [Member]
Debt Instrument [Line Items]
Stated interest rate				5.20%
Long-term Debt							$ 200,000
Debt instrument, maturity date				Oct. 31, 2047
Redemption price, percentage of principal amount				100.00%
Additional issuance of long-term debt		$ 25,000

Senior Notes (Schedule Of Corpo

Senior Notes (Schedule Of Corporate Debt Principal Maturities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Senior notes, net	$ 1,112,672	$ 1,112,409
Non Recourse Debt [Member]
Debt Instrument [Line Items]
2024	500,000
Thereafter	625,000
Senior notes, net	$ 1,125,000

Bank Deposits (Schedule of Depo

Bank Deposits (Schedule of Deposits) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Demand deposits (interest-bearing)	$ 18,125,863	$ 16,886,953
Demand deposits (non-interest-bearing)	524,338	411,890
Certificates of deposit	64,932	97,654
Bank deposits	$ 18,715,133	$ 17,396,497

Bank Deposits (Narrative) (Deta

Bank Deposits (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Bank Deposits [Line Items]
Weighted average interest rate on deposits	0.03%	0.09%
Brokerage Customers Deposits [Member]
Bank Deposits [Line Items]
Deposits of related parties	$ 16,800	$ 16,000
Stifel Nicolaus [Member]
Bank Deposits [Line Items]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 6.4	$ 6.7

Bank Deposits (Scheduled Maturi

Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 2,222	$ 2,719
One to three years	263	409
Three to five years	54	254
Certificates of deposit, less than $100,000	2,539	3,382
Within one year	35,419	63,650
One to three years	26,874	30,622
Three to five years	100
Certificates of deposit, $100,000 and greater	62,393	94,272
Total certificates of deposit	$ 64,932	$ 97,654

Disclosures About Offsetting _3

Disclosures About Offsetting Assets and Liabilities (Financial Assets and Derivative Assets that are Subject to Offset) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting [Abstract]
Gross amounts of recognized assets, Securities borrowing	$ 285,662	$ 313,131
Net amounts presented in the Statement of Financial Condition, Securities borrowing	285,662	313,131
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities borrowing	(51,786)	(46,183)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities borrowing	(226,199)	(244,578)
Securities borrowed, Net amount	7,677	22,370
Gross amounts of recognized assets, Reverse repurchase agreements	470,025	217,930
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	470,025	217,930
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	(22,733)	(17,992)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities purchased under agreements to resell	(445,144)	(199,110)
Securities purchased under agreements to resell, Net amount	2,148	828
Gross amounts of recognized assets	755,687	531,061
Net amounts presented in the Statements of Financial Condition	755,687	531,061
Gross amounts not offset in the Statement of Financial Position	(74,519)	(64,175)
Gross amounts not offset in the Statement of Financial Position, Collateral received	(671,343)	(443,688)
Net amount	$ 9,825	$ 23,198

Disclosures About Offsetting _4

Disclosures About Offsetting Assets and Liabilities (Financial Assets and Derivative Assets that are Subject to Offset) (Details) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral	$ 445,144	$ 199,110
Fair Value Of Securities Pledged As Collateral [Member]
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral	$ 467,900	$ 217,300

Disclosures About Offsetting _5

Disclosures About Offsetting Assets and Liabilities (Financial Liabilities and Derivative Liabilities that are Subject to Offset) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting [Abstract]
Gross amounts of recognized liabilities, Securities lending	$ (231,700)	$ (145,124)
Net amounts presented in the Statement of Financial Condition, Securities lending	(231,700)	(145,124)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending	51,786	46,183
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending	178,055	98,925
Securities lending, Net amount	(1,859)	(16)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell	(208,228)	(190,955)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	(208,228)	(190,955)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	22,733	17,992
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell	185,495	172,963
Gross amounts of recognized liabilities	(439,928)	(336,079)
Net amounts presented in the Statement of Financial Condition	(439,928)	(336,079)
Gross amounts not offset in the Statement of Financial Position, Financial instruments	74,519	64,175
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged	363,550	271,888
Net amount	$ (1,859)	$ (16)

Disclosures About Offsetting _6

Disclosures About Offsetting Assets and Liabilities (Financial Liabilities and Derivative Liabilities that are Subject to Offset) (Details) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party	$ 185,495	$ 172,963
U.S. Government Agency Securities And U.S. Government Securities And Corporate Fixed Income Securities [Member] | Fair Value Of Securities Pledged As Collateral [Member]
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party	$ 218,100	$ 200,200

Commitments, Guarantees, and _2

Commitments, Guarantees, and Contingencies (Narrative) (Details) - To Be Announced Security Contracts [Member] $ in Millions	Mar. 31, 2021USD ($)
Loss Contingencies [Line Items]
Fair value of the TBA securities	$ 121.6
Purchase Commitments [Member]
Loss Contingencies [Line Items]
Estimated fair value of the purchase commitments	$ 121.6

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Narrative) (Details) $ in Millions	Mar. 31, 2021USD ($)
Our Other Broker-Dealer Subsidiaries
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Ratio of indebtedness to net capital	15
Stifel Nicolaus [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Aggregate debit balances	39.80%
Net capital	$ 570.3
Excess of minimum required net capital	541.6
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Net capital under the alternative method	$ 1
Aggregate debit balances	2.00%

Regulatory Capital Requiremen_4

Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 3,033,655
Tier 1 capital, Actual Ratio	0.194
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 939,359
Tier 1 capital For Capital Adequacy Purposes, Ratio	6
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,252,479
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8
Total capital, Actual Amount	$ 3,184,779
Total capital, Actual Ratio	0.203
Total capital For Capital Adequacy Purposes, Amount	$ 1,252,479
Total capital For Capital Adequacy Purposes, Ratio	8
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,565,598
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10
Tier 1 leverage, Actual Amount	$ 3,033,655
Tier 1 leverage, Actual Ratio	0.115
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 1,056,763
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,320,954
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5
Stifel Financial Corp. [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 2,498,655
Tier 1 capital, Actual Ratio	0.160
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 704,519
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,017,639
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.5
Stifel Bank & Trust [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,044,894
Tier 1 capital, Actual Ratio	0.111
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 565,694
Tier 1 capital For Capital Adequacy Purposes, Ratio	6
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 754,259
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8
Total capital, Actual Amount	$ 1,164,585
Total capital, Actual Ratio	0.124
Total capital For Capital Adequacy Purposes, Amount	$ 754,259
Total capital For Capital Adequacy Purposes, Ratio	8
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 942,824
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10
Tier 1 leverage, Actual Amount	$ 1,044,894
Tier 1 leverage, Actual Ratio	0.071
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 590,236
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 737,795
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5
Stifel Bank & Trust [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,044,894
Tier 1 capital, Actual Ratio	0.111
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 424,271
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 612,836
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.5
Stifel Bank [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 280,718
Tier 1 capital, Actual Ratio	0.185
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 91,039
Tier 1 capital For Capital Adequacy Purposes, Ratio	6
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 121,385
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8
Total capital, Actual Amount	$ 291,823
Total capital, Actual Ratio	0.192
Total capital For Capital Adequacy Purposes, Amount	$ 121,385
Total capital For Capital Adequacy Purposes, Ratio	8
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 151,731
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10
Tier 1 leverage, Actual Amount	$ 280,718
Tier 1 leverage, Actual Ratio	0.073
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 154,213
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 192,766
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5
Stifel Bank [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 280,718
Tier 1 capital, Actual Ratio	0.185
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 68,279
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 98,625
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.5

Operating Leases (Narrative) (D

Operating Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Operating lease right-of-use assets, net	$ 774,837	$ 793,181
Operating lease liabilities	$ 822,751	$ 839,800
Minimum [Member] | Office Space and Office Equipment [Member]
Lessee Lease Description [Line Items]
Operating leases remaining lease term	1 year
Maximum [Member] | Office Space and Office Equipment [Member]
Lessee Lease Description [Line Items]
Operating leases remaining lease term	15 years

Operating Leases - Schedule of

Operating Leases - Schedule of Net Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lessee Disclosure [Abstract]
Operating lease cost	$ 25,123	$ 24,395
Short-term lease cost	155	476
Variable lease cost	108	15
Sublease income	(659)	(908)
Net lease cost	24,727	$ 23,978
Operating lease cash flows	22,712
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 8,956
Weighted-average remaining lease term	12 years 1 month 6 days
Weighted-average discount rate	4.18%

Operating Leases - Schedule o_2

Operating Leases - Schedule of Information About Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Lessee Disclosure [Abstract]
Remainder of 2021	$ 75,086
2022	99,194
2023	97,821
2024	95,917
2025	93,931
Thereafter	600,909
Total undiscounted lease payments	1,062,858
Imputed interest	(240,107)
Total operating lease liabilities	$ 822,751	$ 839,800

Revenues from Contracts with _3

Revenues from Contracts with Customers (Schedule of Total Revenues Separated between Revenues from Contracts with Customers and Other Sources of Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Revenue from contracts with customers	$ 847,931	$ 633,108
Other	16,882	4,767
Total revenue from contracts with customers	847,931	633,108
Other sources of revenue:
Interest	127,540	161,177
Principal transactions	165,006	138,666
Other	8,752	4,440
Total revenues	1,149,229	937,391
Commissions [Member]
Revenues:
Revenue from contracts with customers	213,614	211,098
Investment Banking [Member]
Revenues:
Revenue from contracts with customers	339,288	179,468
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers	$ 278,147	$ 237,775

Revenues from Contracts with _4

Revenues from Contracts with Customers (Revenues from Contracts with Customers Disaggregated by Major Business Activity and Primary Geographic Regions) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021		Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Commissions	[1]	$ 213,614		$ 211,098
Investment banking		339,288		179,468
Revenue from contracts with customers		847,931		633,108
Other		16,882		4,767
Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking		208,806	[1]	103,396
Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking		130,482	[1]	76,072
Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		278,147		237,775
Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Commissions	[1]	147,505		136,897
Investment banking		13,549		10,333
Revenue from contracts with customers		454,087		388,991
Other		14,924		4,001
Global Wealth Management [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking		13,549	[1]	10,314
Global Wealth Management [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking				19
Global Wealth Management [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		278,109		237,760
Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Commissions	[1]	66,109		74,198
Investment banking		325,739		169,135
Revenue from contracts with customers		391,886		243,348
Institutional Group [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking		195,257	[1]	93,082
Institutional Group [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking		130,482	[1]	76,053
Institutional Group [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		38		15
Other [Member]
Disaggregation Of Revenue [Line Items]
Commissions	[1]			3
Revenue from contracts with customers		1,958		769
Other		1,958		766
United States [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		759,893		587,803
United States [Member] | Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		454,087		388,991
United States [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		303,848		198,043
United States [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		1,958		769
United Kingdom [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		45,391		30,763
United Kingdom [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		45,391		30,763
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		12,901		9,319
Other [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		12,901		9,319
Canada [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		29,746		5,223
Canada [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		$ 29,746		$ 5,223
[1]	Excludes revenues not derived from contracts with customers included in the Other segment.

Revenues from Contracts with _5

Revenues from Contracts with Customers (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Receivables related to contract with customers	$ 202,400,000	$ 148,600,000
Impairment related to receivables	0
Deferred Revenue	$ 20,300,000	$ 12,100,000

Interest Income and Interest _3

Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest Income Expense Net [Abstract]
Loans held for investment, net	$ 87,239	$ 95,120
Investment securities	29,952	48,137
Margin balances	6,091	10,131
Financial instruments owned	2,895	4,574
Other	1,363	3,215
Total interest income	127,540	161,177
Senior notes	12,103	11,193
Bank deposits	1,283	9,569
Federal Home Loan Bank advances	11	2,353
Other	1,043	1,242
Total interest expense	$ 14,440	$ 24,357

Employee Incentive, Deferred _2

Employee Incentive, Deferred Compensation, And Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to grant	8,300,000
Stock-based compensation	$ 32,029	$ 30,762
Contributions to profit sharing	3,800	3,500
Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 42,400	$ 37,000
Restricted Stock Units, PRSUs, and Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of stock awards outstanding	19,500,000
Unvested stock awards outstanding	16,800,000
Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	5 years
Award performance period	4 years
Performance-based Restricted Stock Units [Member] | One to Four Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of earned award vested	80.00%
Performance-based Restricted Stock Units [Member] | Fifth Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of earned award vested	20.00%
Restricted Stock Units and Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to non-vested options	$ 666,100
Weighted-average period, compensation cost expected to recognized, in years	2 years 9 months 18 days
SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Elective deferrals vested percentage	100.00%
Percentage of earnings deferred into company stock units	5.00%
Percentage of earnings deferred into company stock units, Additional elective deferral	1.00%
Minimum [Member] | Deferred Compensation Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	1 year
Minimum [Member] | Deferred Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	1 year
Minimum [Member] | Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	1 year
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	1 year
Minimum [Member] | Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential percentage of converted shares	0.00%
Minimum [Member] | SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	1 year
Maximum [Member] | Deferred Compensation Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	8 years
Maximum [Member] | Deferred Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	10 years
Maximum [Member] | Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	5 years
Maximum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	10 years
Maximum [Member] | Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential percentage of converted shares	200.00%
Maximum [Member] | SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	10 years

Off-Balance Sheet Credit Risk (

Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
General settlement period of securities transactions	2 days
Fair value of securities accepted as collateral permitted to sell or repledge	$ 2,200	$ 1,800
Fair value of collateral securities sold or repledged	208.2	191
Outstanding commitments to originate loans	840.4	889
Letters of credit outstanding	26.3	31.8
Unfunded Commitment [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Expected credit losses	21.4
Unused Lines Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unused lines of credit to commercial and consumer borrowers	$ 2,800	$ 2,500
Standby Letters of Credit [Member] | Maximum [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit, expiration period	1 year

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	3 Months Ended
	Mar. 31, 2021Segment
Segment Reporting Information [Line Items]
Number of business segments	3
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Number of businesses within operating segment	2

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 1,134,789	$ 913,034
Income/(loss) before income taxes		227,892	115,106
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	631,495	582,956
Income/(loss) before income taxes		223,231	194,167
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	506,081	332,238
Income/(loss) before income taxes		117,188	41,740
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	(2,787)	(2,160)
Income/(loss) before income taxes		$ (112,527)	$ (120,801)
[1]	No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2021 or 2020.

Segment Reporting (Schedule O_2

Segment Reporting (Schedule Of Operating Information, Segment) (Parenthetical) (Details)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting [Abstract]
Net revenues accounted for by individual client, maximum percentage	10.00%	10.00%

Segment Reporting (Schedule O_3

Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total assets	$ 28,141,581	$ 26,604,254
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	23,560,912	21,743,202
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	3,996,969	3,733,661
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 583,700	$ 1,127,391

Segment Reporting (Schedule O_4

Segment Reporting (Schedule Of Net Revenues Earned On Major Geographical Areas) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Total net revenues	[1]	$ 1,134,789	$ 913,034
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues		1,015,895	860,132
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues		61,218	37,738
Canada [Member]
Segment Reporting Information [Line Items]
Total net revenues		42,356	3,543
Other [Member]
Segment Reporting Information [Line Items]
Total net revenues		$ 15,320	$ 11,621
[1]	No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2021 or 2020.

Earnings Per Share (Computation

Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income		$ 173,015	$ 86,589
Preferred dividends		8,289	4,844
Net income available to common shareholders		$ 164,726	$ 81,745
Average shares used in basic computation		107,746	106,929
Dilutive effect of stock options and units	[1]	10,129	8,000
Average shares used in diluted computation		117,875	114,929
Basic		$ 1.53	$ 0.76
Diluted		$ 1.40	$ 0.71
[1]	Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method.

Earnings Per Share (Details)

Earnings Per Share (Details) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Cash dividends declared per common share	$ 0.15	$ 0.11
Cash dividends paid per common share	$ 0.15	$ 0.11

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	Nov. 11, 2020	May 19, 2020	Feb. 21, 2019	Mar. 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to be repurchased					13,000,000
Purchase of treasury stock					$ 12.7	$ 56.2
Treasury stock acquired, Shares,					200,000	1,700,000
Treasury Stock Acquired, Average Cost Per Share					$ 61.91	$ 33.16
Preferred stock, dividend rate percentage	50.00%
Preferred stock, par value					$ 1	$ 1	$ 1
Stock Dividend	50.00%
Non-Cumulative Perpetual Preferred Stock, Series C [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock		$ 225
Preferred stock, dividend rate percentage		6.125%
Preferred stock, par value		$ 1
Preferred stock liquidation preference per depositary share		25
Preferred stock, liquidation preference per share		$ 25,000
Stock Dividend		6.125%
Series C Preferred Stock [Member] | Over-Allotment Option [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock		$ 25
Non-Cumulative Perpetual Preferred Stock, Series B [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock			$ 150
Preferred stock, dividend rate percentage			6.25%
Preferred stock, par value			$ 1
Preferred stock liquidation preference per depositary share			25
Preferred stock, liquidation preference per share			$ 25,000
Stock Dividend			6.25%
Preferred stock, redemption terms					The Company may redeem the Series B preferred stock at its option, subject to regulatory approval, on or after March 15, 2024
Series B Preferred Stock [Member] | Over-Allotment Option [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock				$ 10
Business Bancshares, Inc. [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of common stock					2,300,000

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Assets in partnership	$ 28,141,581	$ 26,604,254
Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets in partnership	$ 330,300

Subsequent Events (Details)

Subsequent Events (Details)	3 Months Ended
	Mar. 31, 2021Event
Subsequent Events [Abstract]
Number of types of subsequent events	2