Stifel Financial (SF) 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 02, 2020
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
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		68,669,327
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		Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents		$ 1,716,570	$ 1,142,596
Cash segregated for regulatory purposes		154,374	131,374
Receivables:
Brokerage clients, net		1,054,659	1,351,786
Brokers, dealers, and clearing organizations		444,685	627,790
Securities purchased under agreements to resell	[1]	436,860	385,008
Financial instruments owned, at fair value		819,715	972,932
Available-for-sale securities, at fair value		2,824,258	3,254,737
Held-to-maturity securities, at amortized cost		3,397,713	2,856,219
Loans:
Held for investment, net		10,650,760	9,624,042
Held for sale, at lower of cost or market		281,475	389,693
Investments, at fair value		108,412	79,972
Fixed assets, net		936,911	1,107,928
Goodwill		1,181,998	1,194,074
Intangible assets, net		145,472	161,773
Loans and advances to financial advisors and other employees, net		582,105	525,332
Deferred tax assets, net		107,775	104,380
Other assets		705,440	700,589
Total assets		25,549,182	24,610,225
Payables:
Brokerage clients		1,027,828	740,444
Brokers, dealers, and clearing organizations		157,353	712,291
Drafts		90,698	119,758
Securities sold under agreements to repurchase	[2]	182,271	391,634
Bank deposits		16,400,001	15,332,581
Financial instruments sold, but not yet purchased, at fair value		599,934	662,852
Accrued compensation		476,836	507,009
Accounts payable and accrued expenses		1,111,569	1,146,856
Federal Home Loan Bank advances			250,000
Senior notes		1,412,005	1,017,010
Debentures to Stifel Financial Capital Trusts		60,000	60,000
Total liabilities		21,518,495	20,940,435
Stifel Financial Corp. shareholders' equity:
Preferred stock - $1 par value; authorized 3,000,000 shares; issued 21,400 and 12,400 shares, respectively		535,000	310,000
Common stock - $0.15 par value; authorized 194,000,000 shares; issued 74,441,197 and 74,441,113 shares, respectively		11,166	11,166
Additional paid-in-capital		1,878,042	1,909,286
Retained earnings		1,913,682	1,715,704
Accumulated other comprehensive income/(loss)		8,079	(11,705)
Treasury stock, at cost, 5,830,670 and 6,113,084 shares, respectively		(315,282)	(319,660)
Total Stifel Financial Corp. shareholders’ equity		4,030,687	3,614,791
Non-controlling interests			54,999
Total equity		4,030,687	3,669,790
Total liabilities and equity		$ 25,549,182	$ 24,610,225
[1]	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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively.
[2]	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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
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	12,400
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	194,000,000	194,000,000
Common stock, shares issued	74,441,197	74,441,113
Treasury stock, shares	5,830,670	6,113,084

Consolidated Statements Of Oper

Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenue from contracts with customers		$ 636,899	$ 585,587	$ 1,875,321	$ 1,661,442
Principal transactions		140,883	97,847	445,566	298,343
Interest		114,411	178,784	403,956	557,795
Other income		20,258	8,747	50,979	34,461
Total revenues		897,122	865,716	2,743,414	2,539,262
Interest expense		13,822	44,144	51,263	146,483
Net revenues	[1]	883,300	821,572	2,692,151	2,392,779
Non-interest expenses:
Compensation and benefits		533,638	486,160	1,657,991	1,411,135
Occupancy and equipment rental		68,598	58,649	200,935	178,566
Communications and office supplies		40,123	36,817	124,293	107,583
Commissions and floor brokerage		13,254	10,542	43,273	32,506
Provision for credit losses		(1,353)	929	33,925	5,565
Other operating expenses		70,647	77,721	215,275	220,879
Total non-interest expenses		724,907	670,818	2,275,692	1,956,234
Income from operations before income tax expense		158,393	150,754	416,459	436,545
Provision for income taxes		37,866	40,632	101,456	117,227
Net income		120,527	110,122	315,003	319,318
Net income applicable to non-controlling interests			708		1,612
Net income applicable to Stifel Financial Corp.		120,527	109,414	315,003	317,706
Preferred dividends		9,897	4,844	19,584	12,476
Net income available to common shareholders		$ 110,630	$ 104,570	$ 295,419	$ 305,230
Earnings per common share:
Basic		$ 1.57	$ 1.47	$ 4.17	$ 4.21
Diluted		1.46	1.34	3.90	3.87
Cash dividends declared per common share		$ 0.17	$ 0.15	$ 0.51	$ 0.45
Weighted-average number of common shares outstanding:
Basic		70,627	71,197	70,814	72,512
Diluted		75,850	78,144	75,712	78,826
Commissions [Member]
Revenues:
Revenue from contracts with customers		$ 172,654	$ 163,920	$ 560,780	$ 484,350
Investment Banking [Member]
Revenues:
Revenue from contracts with customers		218,134	198,790	614,637	540,247
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers		$ 230,782	$ 217,628	$ 667,496	$ 624,066
[1]	No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2020 or 2019.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 120,527	$ 110,122	$ 315,003	$ 319,318
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains on available-for-sale securities	[1],[2]	19,123	16,344	22,467	58,428
Changes in unrealized gains/(losses) on cash flow hedging instruments	[3]	(2,968)	(477)	(651)	(4,260)
Foreign currency translation adjustment		7,946	(4,106)	(2,032)	(5,239)
Total other comprehensive income/(loss), net of tax		24,101	11,761	19,784	48,929
Comprehensive income		144,628	121,883	334,787	368,247
Net income applicable to non-controlling interests			708		1,612
Comprehensive income applicable to Stifel Financial Corp.		$ 144,628	$ 121,175	$ 334,787	$ 366,635
[1]	As part of the adoption of ASU 2019-04, in the third quarter of 2019, the Company made a one-time election to transfer a portion of its held-to-maturity securities to available-for-sale. The transfer resulted in a net of tax increase to accumulated other comprehensive income of $17.9 million.
[2]	There were no reclassifications to earnings for the three months ended September 30, 2020. Net of reclassifications to earnings of realized losses of $0.3 million for the nine months ended September 30, 2020. Reclassifications to earnings during the three months ended September 30, 2019 were immaterial. Net of reclassifications to earnings of realized losses of $0.2 million for the nine months ended September 30, 2019.
[3]	Reclassifications to earnings were immaterial for the three and nine months ended September 30, 2020. Amounts are net of reclassifications to earnings of gains of $0.6 million and $2.9 million for the three and nine months ended September 30, 2019, respectively.

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other comprehensive income/(loss), tax	$ 7.6	$ 4.4	$ (6.4)	$ 18.1
Reclassifications to earnings of realized losses on available-for-sale securities			$ (0.3)	(0.2)
Transfer from held-to-maturity securities to available-for-sale, net of tax		17.9		17.9
Reclassifications to earnings of gains (loss) on cash flow hedging instruments		$ 0.6		2.9
ASU 2019-04 [Member]
Transfer from held-to-maturity securities to available-for-sale, net of tax				$ 17.9

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 Adjustments for Accounting Changes [Member]	[1]	AOCI Attributable to Parent	Treasury Stock at Cost [Member]	Parent [Member]	Non-controlling Interests [Member]
Balance, beginning of period at Dec. 31, 2018			$ 150,000	$ 11,166	$ 1,893,304	$ 1,366,503	$ (11,204)		$ (72,523)	$ (180,857)		$ 30,000
Common stock repurchased	$ (180,400)									(180,434)
Unit amortization, net of forfeitures					86,388
Distributions under employee plans					(84,902)	(18,770)				71,793
Net income	317,706					319,318
Dividends declared, Common						(38,249)
Dividends declared, Preferred						(12,476)
Issuance of preferred stock			160,000		(5,012)
Unrealized gains on securities, net of tax	58,428	[2],[3]							58,428
Unrealized gains/(losses) on cash flow hedging activities, net of tax									(4,260)
Foreign currency translation adjustment, net of tax	(5,239)								(5,239)
Other					37	(1,296)
Capital contributions from non-controlling interest holders												26,800
Distributions to non-controlling interest holders												(2,379)
Deconsolidation of non-controlling interest												1,612
Balance, end of period at Sep. 30, 2019	3,557,748		310,000	11,166	1,889,815	1,603,826			(23,594)	(289,498)	$ 3,501,715	56,033
Balance, beginning of period at Jun. 30, 2019			310,000	11,166	1,867,209	1,512,702	(395)		(35,355)	(236,596)		56,296
Common stock repurchased	(55,500)									(55,468)
Unit amortization, net of forfeitures					26,300
Distributions under employee plans					(3,708)	(478)				2,566
Net income	109,414					110,122
Dividends declared, Common						(12,572)
Dividends declared, Preferred						(4,844)
Unrealized gains on securities, net of tax	16,344	[2],[3]							16,344
Unrealized gains/(losses) on cash flow hedging activities, net of tax									(477)
Foreign currency translation adjustment, net of tax	(4,106)								(4,106)
Other					14	(709)
Distributions to non-controlling interest holders												(971)
Deconsolidation of non-controlling interest												708
Balance, end of period at Sep. 30, 2019	3,557,748		310,000	11,166	1,889,815	1,603,826			(23,594)	(289,498)	3,501,715	56,033
Balance, beginning of period at Dec. 31, 2019	3,669,790		310,000	11,166	1,909,286	1,715,704	$ (7,772)		(11,705)	(319,660)		54,999
Common stock repurchased	(56,500)									(56,517)
Unit amortization, net of forfeitures					88,717
Distributions under employee plans					(113,389)	(47,813)				60,895
Net income	315,003					315,003
Dividends declared, Common						(42,980)
Dividends declared, Preferred						(19,584)
Issuance of preferred stock			225,000		(7,005)
Dividends declared to equity-award holders					350
Unrealized gains on securities, net of tax	22,467	[2],[3]							22,467
Unrealized gains/(losses) on cash flow hedging activities, net of tax									(651)
Foreign currency translation adjustment, net of tax	(2,032)								(2,032)
Other					83	1,124
Deconsolidation of non-controlling interest												$ (54,999)
Balance, end of period at Sep. 30, 2020	4,030,687		535,000	11,166	1,878,042	1,913,682			8,079	(315,282)	4,030,687
Balance, beginning of period at Jun. 30, 2020			535,000	11,166	1,853,191	1,818,335			(16,022)	(317,610)
Unit amortization, net of forfeitures					28,101
Distributions under employee plans					(3,403)	(302)				2,328
Net income	120,527					120,527
Dividends declared, Common						(14,042)
Dividends declared, Preferred						(9,897)
Issuance of preferred stock					15
Unrealized gains on securities, net of tax	19,123	[2],[3]							19,123
Unrealized gains/(losses) on cash flow hedging activities, net of tax									(2,968)
Foreign currency translation adjustment, net of tax	7,946								7,946
Other					138	(939)
Balance, end of period at Sep. 30, 2020	$ 4,030,687		$ 535,000	$ 11,166	$ 1,878,042	$ 1,913,682			$ 8,079	$ (315,282)	$ 4,030,687
[1]	Cumulative adjustments for accounting changes relate to the adoption of certain accounting updates during 2020 and 2019. See Note 2 to the consolidated financial statements for further information.
[2]	As part of the adoption of ASU 2019-04, in the third quarter of 2019, the Company made a one-time election to transfer a portion of its held-to-maturity securities to available-for-sale. The transfer resulted in a net of tax increase to accumulated other comprehensive income of $17.9 million.
[3]	There were no reclassifications to earnings for the three months ended September 30, 2020. Net of reclassifications to earnings of realized losses of $0.3 million for the nine months ended September 30, 2020. Reclassifications to earnings during the three months ended September 30, 2019 were immaterial. Net of reclassifications to earnings of realized losses of $0.2 million for the nine months ended September 30, 2019.

Consolidated Statements Of Sh_2

Consolidated Statements Of Shareholders' Equity (Parenthetical) (Unaudited) - $ / shares	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
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	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities:
Net income	$ 315,003	$ 319,318
Receivables:
Brokerage clients	297,127	(194,655)
Brokers, dealers, and clearing organizations	183,105	(156,658)
Securities purchased under agreements to resell	(51,852)	75,851
Financial instruments owned, including those pledged	153,217	110,240
Loans originated as held for sale	(2,013,038)	(1,293,650)
Proceeds from mortgages held for sale	2,141,691	1,255,823
Loans and advances to financial advisors and other employees	(138,020)	(147,144)
Other assets	64,572	(41,002)
Increase/(decrease) in operating liabilities, net of liabilities assumed:
Brokerage clients	287,384	69,761
Brokers, dealers, and clearing organizations	(33,956)	56,711
Drafts	(29,060)	(20,072)
Financial instruments sold, but not yet purchased	(62,918)	(41,565)
Other liabilities and accrued expenses	(37,105)	(132,768)
Net cash provided by operating activities	1,334,524	33,305
Net cash provided by/(used in) operating activities	1,334,524	33,305
Depreciation and amortization	29,659	28,930
Amortization of loans and advances to financial advisors and other employees	76,728	69,286
Amortization of premium on investment portfolio	15,516	26,687
Provision for credit losses and allowance for loans and advances to financial advisors and other employees	35,066	5,837
Amortization of intangible assets	14,489	10,960
Deferred income taxes	(8,973)	(13,573)
Stock-based compensation	80,987	78,329
(Gains)/losses on sale of investments	22,828	(1,279)
Other, net	(7,926)	(32,062)
Cash Flows From Investing Activities:
Principal paydowns, sales, calls, and maturities of available-for-sale securities	781,922	1,034,741
Calls and principal paydowns of held-to-maturity securities	155,784	456,804
Sale of other real estate owned		7,300
Sale or maturity of investments	2,252	4,263
Disposition of business	37,000
Increase in loans held for investment, net	(1,075,568)	(592,547)
Payments for:
Purchase of fixed assets	(70,532)	(116,307)
Purchase of available-for-sale securities	(628,660)	(239,155)
Purchase of held-to-maturity securities	(384,700)	(243,335)
Purchase of investments	(21,317)	(9,100)
Acquisitions, net of cash received	(280)	(136,196)
Net cash (used in)/provided by investing activities	(1,204,099)	166,468
Cash Flows From Financing Activities:
Repayments of borrowings, net		(62,810)
Repayments of Federal Home Loan Bank advances, net	(250,000)	(290,000)
Payment of contingent consideration	(22,285)	(6,925)
(Decrease)/increase in securities sold under agreements to repurchase	(209,363)	5,189
Increase/(decrease) in bank deposits, net	1,067,420	(1,026,967)
(Decrease)/increase in securities loaned	(520,982)	124,707
Tax payments related to shares withheld for stock-based compensation plans	(70,754)	(30,425)
Proceeds from preferred stock issuance, net	217,995	154,988
Proceeds from issuance of senior notes, net	393,940
Proceeds from non-controlling interests		26,800
Repurchase of common stock	(56,517)	(180,434)
Cash dividends on preferred stock	(18,972)	(12,476)
Cash dividends paid to common stock and equity-award holders	(34,800)	(31,697)
Cash paid to employees upon settlement of equity awards	(27,101)
Other		(2,379)
Net cash provided by/(used in) financing activities	468,581	(1,332,429)
Effect of exchange rate changes on cash	(2,032)	(5,198)
Increase/(decrease) in cash, cash equivalents, and cash segregated for regulatory purposes	596,974	(1,137,854)
Cash, cash equivalents, and cash segregated for regulatory purposes at beginning of period	1,273,970	2,069,374
Cash, cash equivalents, and cash segregated for regulatory purposes at end of period	1,870,944	931,520
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net of refunds	112,190	110,907
Cash paid for interest	66,974	149,984
Noncash financing activities:
Unit grants, net of forfeitures	$ 117,801	$ 128,539

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	Sep. 30, 2020	Dec. 31, 2019
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 1,716,570	$ 1,142,596
Cash segregated for regulatory purposes	154,374	131,374
Total cash, cash equivalents, and cash segregated for regulatory purposes	$ 1,870,944	$ 1,273,970

Nature of Operations, Basis of

Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
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, 2019 on file with the SEC. On March 27, 2020, the Company completed the sale of Ziegler Capital Management, LLC (“ZCM”), a wholly owned asset management subsidiary. The assets and liabilities of ZCM were classified as held for sale and are included in other assets and accounts payable and accrued expenses, respectively, at December 31, 2019. See Note 8 for further information. 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. For consolidated subsidiaries that are less than wholly owned, the third-party holdings of equity interests are referred to as non-controlling interests. The portion of shareholders’ equity that is attributable to non-controlling interests for such subsidiaries is presented as non-controlling interests, a component of total equity, in the consolidated statements of financial condition. Our non-controlling interest at December 31, 2019 represented a 27.5% third-party ownership of North Shore Aviation Holdings LLC (“North Shore”), which was a consolidated subsidiary of the Company that, through its subsidiary, owns airplane engines. On February 7, 2020, North Shore entered into a Credit Agreement with North Shore Aviation Trust Series 2020-1 (the “Trust”) whereby the Trust provided North Shore with a $120.0 million credit facility. North Shore was recapitalized with funding from the issuance of the senior notes and E-Certificates by the Trust. Upon the recapitalization, Stifel Bancorp’s equity in North Shore was redeemed. We deconsolidated the related assets, liabilities, and non-controlling interests of North Shore. 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. Summary of Significant Accounting Policies For a detailed discussion about the Company’s significant accounting policies, see Note 2, Summary of Significant Accounting Policies, in our consolidated financial statements included in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2019. During the nine months ended September 30, 2020, other than the following, there were no significant changes made to the Company’s significant accounting policies. The accounting policy changes are attributable to the adoption of the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016-13, “Financial Instruments − Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”)” on January 1, 2020. This accounting update impacts the impairment model for certain financial assets measured at amortized cost by requiring a current expected credit loss (CECL) methodology to estimate expected credit losses over the entire life of the financial asset, recorded at inception or purchase. CECL replaces the loss model currently applicable to bank loans, held-to-maturity securities, and other receivables carried at amortized cost. These credit loss policy updates are applied prospectively in our consolidated financial statements from January 1, 2020. Reported financial information for the historical comparable period was not revised and continues to be reported under the accounting standards in effect during the historical periods. Allowance for Credit Losses The allowance for credit losses includes both the allowance for loan losses and the reserve for unfunded lending commitments and represents management’s estimate of the expected credit losses in our company’s loan portfolio. The expected credit losses on our loan portfolio are referred to as the allowance for loan losses and are reported separately as a contra-asset to loans on the consolidated statement of financial condition. 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 provision for loan losses related to the loan portfolio in the consolidated statement of operations and the provision for unfunded lending commitments are reported in the consolidated statement of operations in provision for credit losses. For loans, the expected credit loss is typically estimated using quantitative methods that consider a variety of factors such as historical loss experience derived from proxy data, the current credit quality of the portfolio as well as an economic outlook over the life of the loan. The life of the loan for closed-ended products is based on the contractual maturity of the loan adjusted for any expected prepayments. The contractual maturity includes any extension options that are at the sole discretion of the borrower. For open-ended products, the expected credit loss is determined based on the maximum repayment term associated with future draws from credit lines. In our loss forecasting framework, we incorporate forward-looking information through the use of macroeconomic scenarios applied over the forecasted life of the assets. These macroeconomic scenarios include variables that have historically been key drivers of increases and decreases in credit losses. These variables include, but are not limited to, unemployment rates, real estate prices, gross domestic product levels, corporate bond spreads and long-term interest rate forecasts. As any one economic outlook is inherently uncertain, we leverage multiple scenarios. The scenarios that are chosen each quarter and the amount of weighting given to each scenario depend on a variety of factors including recent economic events, leading economic indicators, views of internal as well as third-party economists and industry trends. The reserve for unfunded lending commitments is estimated using the same scenarios, models, and economic data as the loan portfolio. Also included in the allowance for loan losses are qualitative reserves to cover losses that are expected but, in our company’s assessment, may not be adequately represented in the quantitative methods or the economic assumptions described above. For example, factors that we consider include changes in lending policies and procedures, business conditions, the nature and size of the portfolio, portfolio concentrations, the volume and severity of past due loans and nonaccrual loans, the effect of external factors such as competition, and legal and regulatory requirements, among others. Further, we consider the inherent uncertainty in quantitative models that are built on historical data. As a result of the uncertainty inherent in the quantitative models, other quantitative and qualitative factors are considered in adjusting allowance amounts including, but not limited to the following: model imprecision, imprecision in macroeconomic scenario forecasts or changes in the economic environment affecting specific portfolio segments that deviate from the macroeconomic forecasts. Once a loan is determined to be impaired, when principal or interest becomes 90 days past due or when collection becomes uncertain, 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. Loans placed on non-accrual status are returned to accrual status when all delinquent principal and interest payments are collected and the collectability of future principal and interest payments is reasonably assured. Loan losses are charged against the allowance when we believe the uncollectibility of a loan balance is certain. Subsequent recoveries, if any, are credited to the allowance for loan loss. We do not include reserves for interest receivable in the measurement of the allowance for credit losses as we generally classify loans as nonperforming at 90 days past due and reverse interest income for these loans at that time. Large groups of smaller balance homogenous loans are collectively evaluated for impairment. Accordingly, we do not separately identify individual consumer and residential loans for impairment measurements. Impairment is measured on a loan-by-loan basis for non-homogeneous loans, and a specific allowance is established for individual loans determined to be impaired. Impairment is measured by comparing the carrying value of the impaired loan to the present value of its expected cash flow discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. See Note 7 for more information. Available-for-Sale and Held-to-Maturity Securities We evaluate each available-for-sale security where the value has declined below amortized cost. If our company intends to sell or believes it is more likely than not that it will be required to sell the debt security, it is written down to fair value through earnings. For available-for-sale debt securities our company intends to hold, we evaluate the debt securities for expected credit losses except for debt securities that are guaranteed by the U.S. Treasury or U.S. government agencies where we apply a zero credit loss assumption. For the remaining available-for-sale debt securities, we consider qualitative parameters such as internal and external credit ratings and the value of underlying collateral. If an available-for-sale debt security fails any of the qualitative parameters, a discounted cash flow analysis is used by our company to determine if a portion of the unrealized loss is a result of a credit loss. Any credit losses determined are recognized as an increase to the allowance for credit losses through provision expense recorded in the consolidated statement of operations in provision for credit losses. Cash flows expected to be collected are estimated using all relevant information available such as, remaining payment terms, prepayment speeds, the financial condition of the issuer, expected defaults and the value of the underlying collateral. If any of the decline in fair value is related to market factors, that amount is recognized in accumulated other comprehensive income. In certain instances, the credit loss may exceed the total decline in fair value, in which case, the allowance recorded is limited to the difference between the amortized cost and the fair value of the asset. We separately evaluate our held-to-maturity debt securities for any credit losses. We perform a discounted cash flow analysis to estimate any credit losses which are then recognized as part of the allowance for credit losses. For available-for-sale and held-to-maturity debt securities, we have established a nonaccrual policy that results in timely write-off of accrued interest. See Note 6 for more information.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
Prospective Adoption Of New Accounting Pronouncements [Abstract]
New Accounting Pronouncements	NOTE 2 – New Accounting Pronouncements Recently Adopted Accounting Guidance Goodwill Impairment Testing On January 1, 2020, we adopted ASU 2017-04, which simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. Under the accounting update, the annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount, and an impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The adoption of the accounting update did not have a material impact on our consolidated financial statements. The future impact of the accounting update will depend upon the performance of our reporting units and the market conditions impacting the fair value of each reporting unit going forward. Financial Instruments – Credit Losses On January 1, 2020, we adopted ASU 2016-13 that requires the measurement of the allowance for credit losses to be based on management’s best estimate of lifetime expected credit losses inherent in the Company’s relevant financial assets. Upon adoption of the standard on January 1, 2020, we recorded a $10.4 million increase to the allowance for credit losses. The increase in the allowance is driven by the fact that the allowance under the CECL model covers expected credit losses over the full expected life of the loan portfolios and also takes into account forecasts of expected future economic conditions. The cumulative effect of adopting this standard was a decrease to retained earnings of $7.8 million (net of tax). Recently Issued Accounting Guidance Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform - Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The accounting standard related to contracts or hedging relationships that reference LIBOR or other reference rates that are expected to be discontinued due to reference rate reform. The accounting standard provides for optional expedients and other guidance regarding the accounting related to modifications of contracts, hedging relationships and other transactions affected by reference rate reform. We have elected to retrospectively adopt the new standard as of January 1, 2020 which resulted in no immediate impact. While reference rate reform is not expected to have a material accounting impact on our consolidated financial statements, the new standard will ease the administrative burden in accounting for the future effects of reference rate reform. 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. The accounting update is effective for interim and annual periods beginning after December 15, 2020 (January 1, 2021, for our company), and early adoption is permitted. We are currently evaluating the impact that the accounting update will have on our consolidated financial statements .

Receivables From And Payables T

Receivables From And Payables To Brokers, Dealers And Clearing Organizations	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019, included (in thousands) September 30, 2020 December 31, 2019 Receivables from clearing organizations $ 208,361 $ 471,122 Deposits paid for securities borrowed 178,517 135,373 Securities failed to deliver 57,807 21,295 $ 444,685 $ 627,790 Amounts payable to brokers, dealers, and clearing organizations at September 30, 2020 and December 31, 2019, included (in thousands) September 30, 2020 December 31, 2019 Deposits received from securities loaned $ 87,352 $ 608,333 Securities failed to receive 52,322 25,256 Payable to clearing organizations 17,679 78,702 $ 157,353 $ 712,291 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Fair value of investments Unfunded commitments Fair value of investments Unfunded commitments Money market funds $ 106,207 $ — $ 25,734 $ — Mutual funds 6,152 — 7,875 — Private equity funds 1,538 1,203 2,288 1,203 Partnership interests 3,221 895 3,058 953 Total $ 117,118 $ 2,098 $ 38,955 $ 2,156 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 U.S. government agency securities, agency mortgage-backed securities not actively traded, corporate fixed income, sovereign debt securities, and state and municipal securities . Derivatives Derivatives are valued using quoted market prices for identical instruments when available or pricing models based on the net present value of estimated future cash flows. The valuation models used require market observable inputs, including contractual terms, market prices, yield curves, credit curves, and measures of volatility. We manage credit risk for our derivative positions on a counterparty-by-counterparty basis and calculate credit valuation adjustments, included in the fair value of these instruments, on the basis of our relationships at the counterparty portfolio/master netting agreement level. These credit valuation adjustments are determined by applying a credit spread for the counterparty to the total expected exposure of the derivative after considering collateral and other master netting arrangements. We have classified our interest rate swaps as Level 2. Assets and liabilities measured at fair value on a recurring basis as of September 30, 2020, are presented below (in thousands) September 30, 2020 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 42,444 $ 42,444 $ — $ — U.S. government agency securities 117,805 — 117,805 — Mortgage-backed securities: Agency 215,333 — 215,333 — Non-agency 1,197 — 1,197 — Asset-backed securities 44 — 35 9 Corporate securities: Fixed income securities 219,734 1,167 218,567 — Equity securities 71,387 67,093 4,294 — Sovereign debt 3,069 — 3,069 — State and municipal securities 143,201 — 143,201 — Loans 5,501 — — 5,501 Total financial instruments owned 819,715 110,704 703,501 5,510 Available-for-sale securities: U.S. government agency securities 4,630 — 4,630 — State and municipal securities 2,459 — 2,459 — Mortgage-backed securities: Agency 682,174 — 682,174 — Commercial 97,821 — 97,821 — Non-agency 6,779 — 6,779 — Corporate fixed income securities 605,555 — 605,555 — Asset-backed securities 1,424,840 — 1,424,840 — Total available-for-sale securities 2,824,258 — 2,824,258 — Investments: Corporate equity securities 24,925 23,865 — 1,060 Auction rate securities: Equity securities 12,615 — — 12,615 Municipal securities 183 — — 183 Other 59,778 9,749 15,028 35,001 Investments in funds and partnerships measured at NAV 10,911 Total investments 108,412 33,614 15,028 48,859 Cash equivalents measured at NAV 106,207 $ 3,858,592 $ 144,318 $ 3,542,787 $ 54,369 September 30, 2020 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 220,510 $ 220,510 $ — $ — U.S. government agency securities 6,265 — 6,265 — Agency mortgage-backed securities 135,005 — 135,005 — Corporate securities: Fixed income securities 177,744 1,495 176,249 — Equity securities 42,017 42,017 — — Sovereign debt 18,393 — 18,393 — Total financial instruments sold, but not yet purchased $ 599,934 $ 264,022 $ 335,912 $ — Assets and liabilities measured at fair value on a recurring basis as of December 31, 2019, are presented below (in thousands) December 31, 2019 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 9,266 $ 9,266 $ — $ — U.S. government agency securities 66,881 — 66,881 — Mortgage-backed securities: Agency 388,856 — 388,856 — Non-agency 5,155 — 5,155 — Asset-backed securities 28,385 — 28,210 175 Corporate securities: Fixed income securities 250,783 872 249,911 — Equity securities 64,009 61,579 2,430 — Sovereign debt 12,403 — 12,403 — State and municipal securities 137,211 — 137,211 — Loans 9,983 — 832 9,151 Total financial instruments owned 972,932 71,717 891,889 9,326 Available-for-sale securities: U.S. government agency securities 5,067 — 5,067 — State and municipal securities 24,297 — 24,297 — Mortgage-backed securities: Agency 837,878 — 837,878 — Commercial 109,537 — 109,537 — Non-agency 9,758 — 9,758 — Corporate fixed income securities 675,311 — 675,311 — Asset-backed securities 1,592,889 — 1,592,889 — Total available-for-sale securities 3,254,737 — 3,254,737 — Investments: Corporate equity securities 35,083 34,023 — 1,060 Auction rate securities: Equity securities 14,243 — — 14,243 Municipal securities 654 — 470 184 Other 16,771 9,905 6,013 853 Investments in funds and partnerships measured at NAV 13,221 Total investments 79,972 43,928 6,483 16,340 Cash equivalents measured at NAV 25,734 Derivative contracts (1) 1,086 — 1,086 — $ 4,334,461 $ 115,645 $ 4,154,195 $ 25,666 (1) December 31, 2019 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 243,570 $ 243,570 $ — $ — U.S. government agency securities 1,000 — 1,000 — Agency mortgage-backed securities 231,909 — 231,909 — Corporate securities: Fixed income securities 140,100 633 139,467 — Equity securities 32,047 32,047 — — Sovereign debt 13,271 — 13,271 — Loans 955 — — 955 Total financial instruments sold, but not yet purchased $ 662,852 $ 276,250 $ 385,647 $ 955 The following table summarizes the changes in fair value associated with Level 3 financial instruments during the three months ended September 30, 2020 (in thousands) Three Months Ended September 30, 2020 Financial instruments owned Investments Asset-Backed Securities Loans Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at June 30, 2020 $ 175 $ 9,611 $ 1,060 $ 12,621 $ 183 $ 35,001 Unrealized gains/(losses) (166 ) 690 — (6 ) — — Purchases — 667 — — — — Sales — (4,467 ) — — — — Redemptions — (1,000 ) — — — — Net change (166 ) (4,110 ) — (6 ) — — Balance at September 30, 2020 $ 9 $ 5,501 $ 1,060 $ 12,615 $ 183 $ 35,001 The following table summarizes the change in fair value associated with Level 3 financial instruments during the nine months ended September 30, 2020 (in thousands): Nine Months Ended September 30, 2020 Financial instruments owned Investments Asset-Backed Securities Loans Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2019 $ 175 $ 9,151 $ 1,060 $ 14,243 $ 184 $ 853 Unrealized losses (166 ) (2,923 ) — (1,628 ) (1 ) (478 ) Purchases — 7,748 — — — — Sales — (7,472 ) — — — (20 ) Redemptions — (1,003 ) — — — — Transfers into Level 3 — — — — — 34,646 Net change (166 ) (3,650 ) — (1,628 ) (1 ) 34,148 Balance at September 30, 2020 $ 9 $ 5,501 $ 1,060 $ 12,615 $ 183 $ 35,001 The change in fair value associated with Level 3 financial instruments sold, but not yet purchased during the nine months ended September 30, 2020 is attributable to purchases, partially offset by unrealized losses and sales. The results included in the tables above are only a component of the overall investment strategies of our company. The tables above do not present Level 1 or Level 2 valued assets or liabilities. The changes in unrealized gains/(losses) recorded in earnings for the three and nine months ended September 30, 2020, relating to Level 3 assets still held at September 30, 2020, 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 September 30, 2020 and December 31, 2019, whether or not recognized in the consolidated statements of financial condition at fair value (in thousands) September 30, 2020 December 31, 2019 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 1,716,570 $ 1,716,570 $ 1,142,596 $ 1,142,596 Cash segregated for regulatory purposes 154,374 154,374 131,374 131,374 Securities purchased under agreements to resell 436,860 436,860 385,008 385,008 Financial instruments owned 819,715 819,715 972,932 972,932 Available-for-sale securities 2,824,258 2,824,258 3,254,737 3,254,737 Held-to-maturity securities 3,397,713 3,335,033 2,856,219 2,827,883 Bank loans 10,650,760 10,721,120 9,624,042 9,801,986 Loans held for sale 281,475 281,475 389,693 389,693 Investments 108,412 108,412 79,972 79,972 Derivative contracts (1) — — 1,086 1,086 Financial liabilities: Securities sold under agreements to repurchase $ 182,271 $ 182,271 $ 391,634 $ 391,634 Bank deposits 16,400,001 16,198,251 15,332,581 14,467,894 Financial instruments sold, but not yet purchased 599,934 599,934 662,852 662,852 Federal Home Loan Bank advances — — 250,000 250,000 Senior notes 1,412,005 1,560,013 1,017,010 1,069,425 Debentures to Stifel Financial Capital Trusts 60,000 39,338 60,000 45,847 (1) The following tables present the estimated fair values of financial instruments not measured at fair value on a recurring basis as of September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,610,363 $ 1,610,363 $ — $ — Cash segregated for regulatory purposes 154,374 154,374 — — Securities purchased under agreements to resell 436,860 337,095 99,765 — Held-to-maturity securities 3,335,033 — 3,179,239 155,794 Bank loans 10,721,120 — 10,721,120 — Loans held for sale 281,475 — 281,475 — Financial liabilities: Securities sold under agreements to repurchase $ 182,271 $ — $ 182,271 $ — Bank deposits 16,198,251 — 16,198,251 — Senior notes 1,560,013 1,560,013 — — Debentures to Stifel Financial Capital Trusts 39,338 — — 39,338 December 31, 2019 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,116,862 $ 1,116,862 $ — $ — Cash segregated for regulatory purposes 131,374 131,374 — — Securities purchased under agreements to resell 385,008 342,132 42,876 — Held-to-maturity securities 2,827,883 — 2,666,773 161,110 Bank loans 9,801,986 — 9,801,986 — Loans held for sale 389,693 — 389,693 — Financial liabilities: Securities sold under agreements to repurchase $ 391,634 $ 22,205 $ 369,429 $ — Bank deposits 14,467,894 — 14,467,894 — Federal Home Loan Bank advances 250,000 250,000 — — Senior notes 1,069,425 1,069,425 — — Debentures to Stifel Financial Capital Trusts 45,847 — — 45,847 The following, as supplemented by the discussion above, describes the valuation techniques used in estimating the fair value of our financial instruments as of September 30, 2020 and December 31, 2019. 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 September 30, 2020 and December 31, 2019 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. 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. 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. 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 September 30, 2020 and December 31, 2019 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. FHLB Advances FHLB advances reflect terms that approximate current market rates for similar borrowings. 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 are as follows (in thousands) September 30, 2020 December 31, 2019 Financial instruments owned: U.S. government securities $ 42,444 $ 9,266 U.S. government agency securities 117,805 66,881 Mortgage-backed securities: Agency 215,333 388,856 Non-agency 1,197 5,155 Asset-backed securities 44 28,385 Corporate securities: Fixed income securities 219,734 250,783 Equity securities 71,387 64,009 Sovereign debt 3,069 12,403 State and municipal securities 143,201 137,211 Loans 5,501 9,983 $ 819,715 $ 972,932 Financial instruments sold, but not yet purchased: U.S. government securities $ 220,510 $ 243,570 U.S. government agency securities 6,265 1,000 Agency mortgage-backed securities 135,005 231,909 Corporate securities: Fixed income securities 177,744 140,100 Equity securities 42,017 32,047 Sovereign debt 18,393 13,271 Loans — 955 $ 599,934 $ 662,852 At September 30, 2020 and December 31, 2019, financial instruments owned in the amount of $167.0 million and $511.2 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,540 $ 90 $ — $ 4,630 State and municipal securities 2,401 58 — 2,459 Mortgage-backed securities: Agency 664,899 17,491 (216 ) 682,174 Commercial 93,864 3,957 — 97,821 Non-agency 6,793 70 (84 ) 6,779 Corporate fixed income securities 581,249 24,349 (43 ) 605,555 Asset-backed securities 1,438,951 3,502 (17,613 ) 1,424,840 $ 2,792,697 $ 49,517 $ (17,956 ) $ 2,824,258 Held-to-maturity securities (2) Asset-backed securities $ 3,397,713 $ 3,415 $ (66,095 ) $ 3,335,033 December 31, 2019 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,028 $ 39 $ — $ 5,067 State and municipal securities 24,198 99 — 24,297 Mortgage-backed securities: Agency 840,659 3,070 (5,851 ) 837,878 Commercial 109,982 269 (714 ) 109,537 Non-agency 9,731 50 (23 ) 9,758 Corporate fixed income securities 664,028 11,283 — 675,311 Asset-backed securities 1,600,415 679 (8,205 ) 1,592,889 $ 3,254,041 $ 15,489 $ (14,793 ) $ 3,254,737 Held-to-maturity securities (2) Asset-backed securities $ 2,856,219 $ 5,960 $ (34,296 ) $ 2,827,883 (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. Effective January 1, 2020, we adopted the new accounting standard for credit losses that requires evaluation of available-for-sale and held-to-maturity debt securities for any expected losses with recognition of an allowance for credit losses, when applicable. For more information, see Note 1 – Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies Accrued interest receivable for our investment portfolio at September 30, 2020 was $25.1 million 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. There were no sales of available-for-sale securities during the three months ended September 30, 2020. For the nine months ended September 30, 2020, we received proceeds of $491.9 million, from the sale of available-for-sale securities, which resulted in a realized loss of $0.5 million. For the three and nine months ended September 30, 2019, we received proceeds of $486.5 million and $641.8 million, respectively, from the sale of available-for-sale securities, which resulted in an immaterial realized gain for the third quarter of 2019 and a realized loss of $0.3 million for the nine months ended September 30, 2019. During the second quarter of 2020, the Company transferred $ 313.0 million of certain asset-backed securities from the available-for-sale category 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. During the third quarter of 2019, the Company transferred certain mortgage-backed securities from the held-to-maturity category to available-for sale. As of August 1, 2019, the securities reclassified had a fair value of $1.1 billion and resulted in a net of tax increase to other comprehensive income of $17.9 million for the three and nine months ended September 30, 2019. During the three months ended September 30, 2020 and September 30, 2019, unrealized gains, net of deferred taxes, of $19.1 million and unrealized losses, net of deferred taxes, of $1.6 million were recorded in accumulated other comprehensive loss in the consolidated statements of financial condition. During the nine months ended September 30, 2020 and September 30, 2019, unrealized gains, net of deferred taxes, of $22.5 million and unrealized gains, net of deferred taxes, of $40.5 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 September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 December 31, 2019 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Available-for-sale securities Within one year $ 152,731 $ 154,255 $ 6,861 $ 6,871 After one year through three years 85,773 88,263 229,184 229,760 After three years through five years 302,285 320,037 422,236 429,909 After five years through ten years 528,866 527,815 409,664 411,680 After ten years 1,723,042 1,733,888 2,186,096 2,176,517 $ 2,792,697 $ 2,824,258 $ 3,254,041 $ 3,254,737 Held-to-maturity securities After three years through five years $ 6,537 $ 6,533 $ — $ — After five years through ten years 1,302,344 1,281,809 598,250 597,166 After ten years 2,088,832 2,046,691 2,257,969 2,230,717 $ 3,397,713 $ 3,335,033 $ 2,856,219 $ 2,827,883 The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at September 30, 2020, 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 $ 2,318 $ 2,312 $ — $ — $ 4,630 State and municipal securities — — 2,459 — 2,459 Mortgage-backed securities: Agency 11 444 24,017 657,702 682,174 Commercial 18,656 22 — 79,143 97,821 Non-agency 6,066 — — 713 6,779 Corporate fixed income securities 127,204 405,522 55,732 17,097 605,555 Asset-backed securities — — 445,607 979,233 1,424,840 $ 154,255 $ 408,300 $ 527,815 $ 1,733,888 $ 2,824,258 Held-to-maturity securities Asset-backed securities $ — $ 6,537 $ 1,302,344 $ 2,088,832 $ 3,397,713 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis. At September 30, 2020 and December 31, 2019, securities of $188.4 million and $801.5 million, respectively, were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. At September 30, 2020 and December 31, 2019, securities of $1.5 billion and $816.1 million, 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 September 30, 2020 (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 $ (118 ) $ 6,797 $ (98 ) $ 10,191 $ (216 ) $ 16,988 Non-agency — — (84 ) 713 (84 ) 713 Corporate fixed income securities (43 ) 13,956 — — (43 ) 13,956 Asset-backed securities (8,016 ) 668,379 (9,597 ) 622,139 (17,613 ) 1,290,518 $ (8,177 ) $ 689,132 $ (9,779 ) $ 633,043 $ (17,956 ) $ 1,322,175 At September 30, 2020, the amortized cost of 91 securities classified as available for sale exceeded their fair value by $18.0 million, of which $9.8 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 September 30, 2020, was $1.3 billion, which was 46.8% of our available-for-sale portfolio. Credit Quality Indicators The Company uses Moody credit ratings as the 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 September 30, 2020 (in thousands) AAA AA A C Total Held-to-maturity securities Asset-backed securities $ 423,043 $ 2,956,572 $ 15,500 $ 2,598 $ 3,397,713

Bank Loans

Bank Loans	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 (in thousands, except percentages) September 30, 2020 December 31, 2019 Balance Percent Balance Percent Commercial and industrial $ 4,080,939 37.9 % $ 3,438,953 35.3 % Residential real estate 3,804,836 35.4 3,309,548 33.9 Securities-based loans 1,841,516 17.1 2,098,211 21.5 Commercial real estate 386,957 3.6 428,549 4.4 Construction and land 532,319 5.0 398,839 4.1 Home equity lines of credit 67,386 0.6 51,205 0.5 Other 39,735 0.4 27,311 0.3 Gross bank loans 10,753,688 100.0 % 9,752,616 100.0 % Unamortized loan discount, net (2,260 ) (6,588 ) Loans in process 13,398 (27,717 ) Unamortized loan fees, net 47 1,310 Allowance for loan losses (114,113 ) (95,579 ) Loans held for investment, net $ 10,650,760 $ 9,624,042 At September 30, 2020 and December 31, 2019, Stifel Bancorp had loans outstanding to its executive officers and directors and executive officers and directors of certain affiliated entities in the amount of $21.8 At September 30, 2020 and December 31, 2019, we had loans held for sale of $281.5 million and $389.7 million, respectively. For the three months ended September 30, 2020 and 2019, we recognized gains of $15.0 million and $4.5 million, respectively, from the sale of originated loans, net of fees and costs. For the nine months ended September 30, 2020 and 2019, we recognized gains of $28.0 million and $7.7 million, respectively, from the sale of originated loans, net of fees and costs. Effective January 1, 2020, we adopted the new accounting standard for credit losses that requires evaluation of our loan portfolio for any expected losses with recognition of an allowance for credit losses, when applicable. For more information, see Note 1 – Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies Accrued interest receivable for loans and loans held for sale at September 30, 2020 was $18.6 million and is reported in other assets on the consolidated statement of financial condition. The following tables detail activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30 , 2020 (in thousands) . Three Months Ended September 30, 2020 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 65,503 $ 10,303 $ (1 ) $ 4 $ 75,809 Residential real estate 24,043 (6,360 ) — — 17,683 Construction and land 13,075 (2,889 ) — — 10,186 Commercial real estate 10,647 (2,730 ) — — 7,917 Securities-based loans 1,807 95 — — 1,902 Home equity lines of credit 499 (205 ) — 87 381 Other 247 9 (22 ) 1 235 $ 115,821 $ (1,777 ) $ (23 ) $ 92 $ 114,113 Nine Months Ended September 30, 2020 Beginning Balance CECL Adoption Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 69,949 $ (19,940 ) $ 25,949 $ (153 ) $ 4 $ 75,809 Residential real estate 14,253 3,499 (69 ) — — 17,683 Construction and land 4,613 2,674 2,899 — — 10,186 Commercial real estate 3,564 791 3,562 — — 7,917 Securities-based loans 2,361 1,346 (1,805 ) — — 1,902 Home equity lines of credit 442 39 (188 ) — 88 381 Other 194 58 21 (40 ) 2 235 Unallocated 203 (203 ) — — — — $ 95,579 $ (11,736 ) $ 30,369 $ (193 ) $ 94 $ 114,113 The provision for unfunded lending commitments was a credit of $3.0 million and an expense of $0.1 million for the three and nine months ended September 30, 2020, respectively and are 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 presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at September 30, 2020 (in thousands) Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial and industrial $ 8,158 $ 67,651 $ 75,809 $ 13,084 $ 4,067,855 $ 4,080,939 Residential real estate 24 17,659 17,683 1,409 3,803,427 3,804,836 Securities-based loans — 1,902 1,902 — 1,841,516 1,841,516 Commercial real estate — 7,917 7,917 — 386,957 386,957 Construction and land — 10,186 10,186 — 532,319 532,319 Home equity lines of credit — 381 381 — 67,386 67,386 Other — 235 235 — 39,735 39,735 $ 8,182 $ 105,931 $ 114,113 $ 14,493 $ 10,739,195 $ 10,753,688 The following tables detail activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30 , 2019 (in thousands) . Three Months Ended September 30, 2019 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 69,263 $ (1,070 ) $ (21 ) $ — $ 68,172 Residential real estate 12,042 519 — 1 12,562 Securities-based loans 2,311 (130 ) — — 2,181 Commercial real estate 2,478 425 — — 2,903 Construction and land 2,402 865 — — 3,267 Home equity lines of credit 421 13 — 1 435 Other 179 38 (35 ) 13 195 Unallocated 1,376 269 — — 1,645 $ 90,472 $ 929 $ (56 ) $ 15 $ 91,360 Nine Months Ended September 30, 2019 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 68,367 $ (116 ) $ (79 ) $ — $ 68,172 Residential real estate 11,228 1,246 — 88 12,562 Securities-based loans 1,978 203 — — 2,181 Commercial real estate 1,778 1,125 — — 2,903 Construction and land 1,241 2,026 — — 3,267 Home equity lines of credit 310 123 — 2 435 Other 88 156 (87 ) 38 195 Unallocated 843 802 — — 1,645 $ 85,833 $ 5,565 $ (166 ) $ 128 $ 91,360 The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at December 31, 2019 (in thousands) Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial and industrial $ 8,158 $ 61,791 $ 69,949 $ 12,991 $ 3,425,962 $ 3,438,953 Residential real estate 24 14,229 14,253 1,412 3,308,136 3,309,548 Securities-based loans — 2,361 2,361 — 2,098,211 2,098,211 Commercial real estate — 3,564 3,564 — 428,549 428,549 Construction and land — 4,613 4,613 — 398,839 398,839 Home equity lines of credit — 442 442 184 51,021 51,205 Other — 194 194 — 27,311 27,311 Unallocated — 203 203 — — — $ 8,182 $ 87,397 $ 95,579 $ 14,587 $ 9,738,029 $ 9,752,616 At September 30, 2020, we had $14.5 million of impaired loans, net of discounts, which included $0.2 million in troubled debt restructurings. The specific allowance on impaired loans at September 30, 2020 was $8.2 million. At December 31, 2019, we had $14.6 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, 2019 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 and nine months ended September 30, 2020 and 2019, were insignificant to the consolidated financial statements. In March 2020, the President signed into law the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”), which among other things, provided optional, temporary relief from accounting for certain loan modifications as troubled debt restructurings (TDRs). Under the CARES Act, TDR relief is available to banks for loan modifications related to the adverse effects of the coronavirus (COVID-19) pandemic granted to borrowers that were current as of December 31, 2019. TDR relief applies to COVID-related modifications made from March 1, 2020, until the earlier of December 31, 2020, or 60 days following the termination of the national emergency declared by the President of the United States. We elected to apply the TDR relief provided by the CARES Act in the second quarter of 2020. The tables below present loans that were individually evaluated for impairment by portfolio segment at September 30, 2020 and December 31, 2019, including the average recorded investment balance for the year to date period presented (in thousands) September 30, 2020 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 13,084 $ — $ 13,084 $ 13,084 $ 8,158 $ 13,085 Residential real estate 1,409 1,249 160 1,409 24 1,499 Home equity lines of credit — — — — — 61 Other 150 — — — — — Total $ 14,643 $ 1,249 $ 13,244 $ 14,493 $ 8,182 $ 14,645 December 31, 2019 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 12,991 $ 51 $ 12,940 $ 12,991 $ 8,158 $ 14,172 Residential real estate 1,412 1,412 — 1,412 24 1,231 Home equity lines of credit 184 184 — 184 — 184 Other 150 — — — — — Total $ 14,737 $ 1,647 $ 12,940 $ 14,587 $ 8,182 $ 15,587 The following tables present the aging of the recorded investment in past due loans at September 30, 2020 and December 31, 2019 by portfolio segment (in thousands) As of September 30, 2020 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Commercial and industrial $ 144 $ 12,940 $ 13,084 $ 4,067,855 $ 4,080,939 Residential real estate 3,290 1,337 4,627 3,800,209 3,804,836 Securities-based loans — — — 1,841,516 1,841,516 Commercial real estate — — — 386,957 386,957 Construction and land — — — 532,319 532,319 Home equity lines of credit 686 — 686 66,700 67,386 Other 25 — 25 39,710 39,735 Total $ 4,145 $ 14,277 $ 18,422 $ 10,735,266 $ 10,753,688 As of September 30, 2020* Non-Accrual Restructured Nonperforming loans with no allowance Total Commercial and industrial $ 13,084 $ — $ — $ 13,084 Residential real estate — 160 1,249 1,409 Total $ 13,084 $ 160 $ 1,249 $ 14,493 * There were no loans past due 90 days and still accruing interest at September 30, 2020. As of December 31, 2019 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ — $ 12,940 $ 12,940 $ 3,426,013 $ 3,438,953 Residential real estate 10,476 1,249 11,725 3,297,823 3,309,548 Securities-based loans — — — 2,098,211 2,098,211 Commercial real estate — — — 428,549 428,549 Construction and land — — — 398,839 398,839 Home equity lines of credit 83 184 267 50,938 51,205 Other 5 — 5 27,306 27,311 Total $ 10,564 $ 14,373 $ 24,937 $ 9,727,679 $ 9,752,616 As of December 31, 2019* Non-Accrual Restructured Total Commercial and industrial $ 12,940 $ — $ 12,940 Residential real estate 1,249 163 1,412 Home equity lines of credit 184 — 184 Total $ 14,373 $ 163 $ 14,536 * There were no loans past due 90 days and still accruing interest at December 31, 2019. Credit quality indicators As of September 30, 2020, 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 September 30, 2020 and December 31, 2019, 98.6% and 98.3% 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 September 30, 2020 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,791,192 $ 120,663 $ 156,144 $ 12,940 $ 4,080,939 Residential real estate 3,802,942 645 — 1,249 3,804,836 Securities-based loans 1,841,516 — — — 1,841,516 Commercial real estate 385,645 1,168 144 — 386,957 Construction and land 498,079 14,240 20,000 — 532,319 Home equity lines of credit 66,920 466 — — 67,386 Other 39,735 — — — 39,735 Total $ 10,426,029 $ 137,182 $ 176,288 $ 14,189 $ 10,753,688 As of December 31, 2019 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,365,800 $ 48,241 $ 11,972 $ 12,940 $ 3,438,953 Residential real estate 3,307,719 417 1,412 — 3,309,548 Securities-based loans 2,098,211 — — — 2,098,211 Commercial real estate 427,963 586 — — 428,549 Construction and land 398,839 — — — 398,839 Home equity lines of credit 51,021 — 184 — 51,205 Other 27,311 — — — 27,311 Total $ 9,676,864 $ 49,244 $ 13,568 $ 12,940 $ 9,752,616 Term Loans Amortized Cost Basis by Origination Year – September 30, 2020 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total Commercial and industrial: Pass $ 466,481 $ 105,957 $ 2,355,918 $ 19,375 $ 11,154 $ 47,763 $ 784,544 $ 3,791,192 Special Mention — — 106,214 — — — 14,449 120,663 Substandard — — 146,584 — — 27 9,533 156,144 Doubtful — — — 12,940 — — — 12,940 $ 466,481 $ 105,957 $ 2,608,716 $ 32,315 $ 11,154 $ 47,790 $ 808,526 $ 4,080,939 Residential real estate: Pass $ 1,217,617 $ 964,320 $ 412,590 $ 326,393 $ 303,909 $ 578,113 $ — $ 3,802,942 Special Mention — — — 645 — — — 645 Substandard — — — — — — — — Doubtful — — — 149 — 1,100 — 1,249 $ 1,217,617 $ 964,320 $ 412,590 $ 327,187 $ 303,909 $ 579,213 $ — $ 3,804,836 Securities-based loans: Pass $ 21,968 $ 108,647 $ 25,825 $ 195 $ 300 $ 56,691 $ 1,627,890 $ 1,841,516 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ 21,968 $ 108,647 $ 25,825 $ 195 $ 300 $ 56,691 $ 1,627,890 $ 1,841,516 Commercial real estate: Pass $ 74,689 $ 158,422 $ 42,432 $ 52,387 $ 13,470 $ 43,469 $ 776 $ 385,645 Special Mention — — — — 1,168 — — 1,168 Substandard — — 144 — — — — 144 Doubtful — — — — — — — — $ 74,689 $ 158,422 $ 42,576 $ 52,387 $ 14,638 $ 43,469 $ 776 $ 386,957 Construction and land: Pass $ 44,892 $ 254,524 $ 111,147 $ 68,495 $ 6,852 $ 1,370 $ 10,799 $ 498,079 Special Mention — — 14,240 — — — — 14,240 Substandard — — 20,000 — — — — 20,000 Doubtful — — — — — — — — $ 44,892 $ 254,524 $ 145,387 $ 68,495 $ 6,852 $ 1,370 $ 10,799 $ 532,319 Home equity lines of credit: Pass $ — $ — $ — $ — $ — $ — $ 66,920 $ 66,920 Special Mention — — — — — — 466 466 Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ — $ — $ — $ — $ 67,386 $ 67,386 Other: Pass $ — $ — $ 6 $ — $ 755 $ 20,049 $ 18,925 $ 39,735 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ 6 $ — $ 755 $ 20,049 $ 18,925 $ 39,735

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2020
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, 2019 Adjustments Sale of ZCM September 30, 2020 Goodwill Global Wealth Management $ 344,981 $ — $ (9,972 ) $ 335,009 Institutional Group 849,093 (2,104 ) — 846,989 $ 1,194,074 $ (2,104 ) $ (9,972 ) $ 1,181,998 December 31, 2019 Adjustments/ Sale of ZCM Amortization September 30, 2020 Intangible assets Global Wealth Management $ 53,279 $ (1,532 ) $ (5,006 ) $ 46,741 Institutional Group 108,494 (280 ) (9,483 ) 98,731 $ 161,773 $ (1,812 ) $ (14,489 ) $ 145,472 The adjustments to goodwill and intangible assets during the nine months ended September 30, 2020 are primarily attributable to the sale of ZCM, and the acquisitions of Mooreland Partners on July 1, 2019 and B&F Capital Markets on September 3, 2019. On March 27, 2020, the Company completed the sale of ZCM, a wholly owned asset management subsidiary. The Company recorded a gain on the sale, which included a write-off of allocated goodwill and the remaining net book value of intangible assets. The allocation of the purchase price of these acquisitions are preliminary and will be finalized upon completion of the analysis of the fair values of the net assets as of the respective acquisition dates and the identified intangible assets. The final goodwill recorded on the consolidated statement of financial condition may differ from that reflected herein as a result of future measurement period adjustments and the recording of identified intangible assets. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of each respective business, its employees and customer base. 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 September 30, 2020 and December 31, 2019 were as follows (in thousands) September 30, 2020 December 31, 2019 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 203,188 $ 82,990 $ 207,253 $ 75,987 Trade names 28,659 15,196 28,659 13,649 Core deposits 8,615 4,387 8,615 2,985 Non-compete agreements 9,240 3,825 9,490 2,828 Investment banking backlog 840 303 4,245 1,787 Acquired technology 4,045 2,414 840 93 $ 254,587 $ 109,115 $ 259,102 $ 97,329 Amortization expense related to intangible assets was $4.7 million and $3.8 million for the three months ended September 30, 2020 and 2019, respectively. Amortization expense related to intangible assets was $14.5 million and $11.0 million for the nine months ended September 30, 2020 and 2019, 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 September 30, 2020, are: customer relationships, 9.9 years; trade name, 9.1 years; core deposits, 3.3 years; non-compete agreements, 6.1 years; investment banking backlog, 7.9 years; and acquired technology, 1.8 years. We have an intangible asset that is not subject to amortization and is, therefore, not included in the table below. As of September 30, 2020, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2020 $ 4,630 2021 17,769 2022 16,444 2023 14,619 2024 13,958 Thereafter 75,934 $ 143,354

Borrowings and Federal Home Loa

Borrowings and Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, totaled $915.0 million with five 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 $490.0 million during the nine months ended September 30, 2020. 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 September 30, 2020, 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 and nine months ended September 30, 2020 was 1.31% and 1.43%, respectively. 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 September 30, 2020, there were no Federal Home Loan advances. Our committed bank line financing at September 30, 2020, 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 September 30, 2020, 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 September 30, 2020, we had no advances on the Stifel Credit Facility and were in compliance with all covenants.

Senior Notes

Senior Notes	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Senior Notes	NOTE 10 – Senior Notes The following table summarizes our senior notes as of September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 December 31, 2019 4.25% senior notes, due 2024 (1) $ 500,000 $ 500,000 3.50% senior notes, due 2020 (2) 300,000 300,000 5.20% senior notes, due 2047 (3) 225,000 225,000 4.00% senior notes, due 2030 (4) 400,000 — 1,425,000 1,025,000 Debt issuance costs, net (12,995 ) (7,990 ) Senior notes, net $ 1,412,005 $ 1,017,010 (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 December 2015, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 3.50% senior notes due December 2020 (3) October 2047 (4) 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 Our senior notes mature as follows, based upon contractual terms (in thousands) 2020 $ 300,000 2021 — 2022 — 2023 — 2024 500,000 Thereafter 625,000 $ 1,425,000

Bank Deposits

Bank Deposits	9 Months Ended
	Sep. 30, 2020
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Bank Deposits	NOTE 11 – Bank Deposits Deposits consist of money market and savings accounts, certificates of deposit, and demand deposits. Deposits at September 30, 2020 and December 31, 2019 were as follows (in thousands) September 30, 2020 December 31, 2019 Money market and savings accounts $ 15,653,048 $ 13,530,670 Demand deposits (interest-bearing) 363,999 1,113,296 Demand deposits (non-interest-bearing) 271,056 165,657 Certificates of deposit 111,898 522,958 $ 16,400,001 $ 15,332,581 The weighted-average interest rate on deposits was 0.11% and 0.64% at September 30, 2020 and December 31, 2019, respectively. Scheduled maturities of certificates of deposit at September 30, 2020 and December 31, 2019 were as follows (in thousands): September 30, 2020 December 31, 2019 Certificates of deposit, less than $100,000: Within one year $ 3,120 $ 5,305 One to three years 244 360 Three to five years 13 13 $ 3,377 $ 5,678 Certificates of deposit, $100,000 and greater: Within one year $ 74,158 $ 441,341 One to three years 34,163 68,855 Three to five years 200 7,084 108,521 517,280 $ 111,898 $ 522,958 At September 30, 2020 and December 31, 2019, the amount of deposits includes related party deposits, primarily interest-bearing and time deposits of executive officers, directors, and their affiliates of $8.8 million and $6.7 million, respectively. Brokerage customers’ deposits were $15.4 billion and $13.9 billion, respectively.

Disclosures About Offsetting As

Disclosures About Offsetting Assets And Liabilities	9 Months Ended
	Sep. 30, 2020
Offsetting [Abstract]
Disclosures About Offsetting Assets And Liabilities	NOTE 12 – Disclosures About Offsetting Assets and Liabilities The following table provides information about financial assets and derivative assets that are subject to offset as of September 30, 2020 and December 31, 2019 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts Presented in the of Financial Condition Amounts available for offset Available collateral Net Amount As of September 30, 2020: Securities borrowing (1) $ 178,517 $ — $ 178,517 $ (31,528 ) $ (127,965 ) $ 19,024 Reverse repurchase agreements (2) 436,860 — 436,860 (48,594 ) (384,970 ) 3,296 $ 615,377 $ — $ 615,377 $ (80,122 ) $ (512,935 ) $ 22,320 As of December 31, 2019: Securities borrowing (1) $ 135,373 $ — $ 135,373 $ (52,319 ) $ (74,760 ) $ 8,294 Reverse repurchase agreements (2) 385,008 — 385,008 (59,892 ) (325,096 ) 20 Cash flow interest rate contracts 1,086 — 1,086 — — 1,086 $ 521,467 $ — $ 521,467 $ (112,211 ) $ (399,856 ) $ 9,400 (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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively. The following table provides information about financial liabilities and derivative liabilities that are subject to offset as of September 30, 2020 and December 31, 2019 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Liabilities Gross Amounts Offset in the of Financial Condition Net Amounts Presented in the Statement of Financial Condition Amounts available for offset Collateral Pledged Net Amount As of September 30, 2020: Securities lending (3) $ (87,352 ) $ — $ (87,352 ) $ 31,528 $ 55,802 $ (22 ) Repurchase agreements (4) (182,271 ) — (182,271 ) 48,594 133,677 — $ (269,623 ) $ — $ (269,623 ) $ 80,122 $ 189,479 $ (22 ) As of December 31, 2019: Securities lending (3) $ (608,333 ) $ — $ (608,333 ) $ 52,319 $ 555,782 $ (232 ) Repurchase agreements (4) (391,634 ) — (391,634 ) 59,892 331,742 — $ (999,967 ) $ — $ (999,967 ) $ 112,211 $ 887,524 $ (232 ) (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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively.

Commitments, Guarantees, and Co

Commitments, Guarantees, and Contingencies	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, 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 September 30, 2020, the fair value of the TBA securities and the estimated fair value of the purchase commitments were $119.5 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 September 30 , 2020 , 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	9 Months Ended
	Sep. 30, 2020
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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, Stifel had net capital of $468.5 million, which was 37.8% of aggregate debit items and $443.7 million in excess of its minimum required net capital. At September 30, 2020, 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 September 30, 2020, 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 September 30, 2020, 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 September 30, 2020 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 $ 2,197,654 15.4 % $ 640,212 4.5 % $ 924,750 6.5 % Tier 1 capital 2,732,654 19.2 % 853,616 6.0 % 1,138,154 8.0 % Total capital 2,888,681 20.3 % 1,138,154 8.0 % 1,422,693 10.0 % Tier 1 leverage 2,732,654 11.3 % 971,609 4.0 % 1,214,512 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 $ 1,034,480 11.7 % $ 397,280 4.5 % $ 573,849 6.5 % Tier 1 capital 1,034,480 11.7 % 529,707 6.0 % 706,276 8.0 % Total capital 1,144,843 13.0 % 706,276 8.0 % 882,845 10.0 % Tier 1 leverage 1,034,480 7.2 % 578,347 4.0 % 722,934 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 $ 201,106 18.0 % $ 50,266 4.5 % $ 72,606 6.5 % Tier 1 capital 201,106 18.0 % 67,021 6.0 % 89,361 8.0 % Total capital 215,097 19.3 % 89,361 8.0 % 111,701 10.0 % Tier 1 leverage 201,106 7.3 % 110,807 4.0 % 138,508 5.0 %

Operating Leases

Operating Leases	9 Months Ended
	Sep. 30, 2020
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 16 years. At September 30, 2020, operating lease right-of-use assets were $771.2 million and included in fixed assets, net in the consolidated statements of financial condition, and lease liabilities were $811.0 million and 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 and nine months ended September 30 , 2020 and 2019 (in thousands) : Three Months Ended September 30, 2020 2019 Operating lease cost $ 25,251 $ 22,921 Short-term lease cost 590 403 Variable lease cost 20 54 Sublease income (997 ) (1,244 ) Net lease cost $ 24,864 $ 22,134 Nine Months Ended September 30, 2020 2019 Operating lease cost $ 73,172 $ 68,081 Short-term lease cost 2,892 1,152 Variable lease cost 62 88 Sublease income (2,901 ) (3,729 ) Net lease cost $ 73,225 $ 65,592 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 September 30, 2020 (in thousands) Operating lease cash flows $ 63,724 Weighted-average remaining lease term 12.1 years Weighted-average discount rate 4.32 % In the table above, the weighted average discount rate represents our company’s incremental borrowing rate as of January 2019 for leases existing on the date of adoption of the new lease standard and at the lease inception date for leases entered into subsequent to the adoption of ASU 2016-02. The table below presents information about operating lease liabilities as of September 30, 2020, (in thousands, except percentages) Remainder of 2020 $ 21,202 2021 92,043 2022 94,084 2023 93,289 2024 92,127 Thereafter 686,863 Total undiscounted lease payments 1,079,608 Imputed interest (268,582 ) Total operating lease liabilities $ 811,026

Revenues from Contracts with Cu

Revenues from Contracts with Customers	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020 and 2019 (in thousands) Three Months Ended September 30, 2020 2019 Revenues from contracts with customers: Commissions $ 172,654 $ 163,920 Investment banking 218,134 198,790 Asset management and service fees 230,782 217,628 Other 15,329 5,249 Total revenue from contracts with customers 636,899 585,587 Other sources of revenue: Interest 114,411 178,784 Principal transactions 140,883 97,847 Other 4,929 3,498 Total revenues $ 897,122 $ 865,716 Nine Months Ended September 30, 2020 2019 Revenues from contracts with customers: Commissions $ 560,780 $ 484,350 Investment banking 614,637 540,247 Asset management and service fees 667,496 624,066 Other 32,408 12,779 Total revenue from contracts with customers 1,875,321 1,661,442 Other sources of revenue: Interest 403,956 557,795 Principal transactions 445,566 298,343 Other 18,571 21,682 Total revenues $ 2,743,414 $ 2,539,262 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 and nine months ended September 30, 2020 and 2019 (in thousands) Three Months Ended September 30, 2020 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions (1) $ 120,600 $ 52,054 $ — $ 172,654 Capital raising (1) 8,113 129,179 — 137,292 Advisory fees (1) — 80,842 — 80,842 Investment banking 8,113 210,021 — 218,134 Asset management 230,765 17 — 230,782 Other 14,535 — 794 15,329 Total 374,013 262,092 794 636,899 Primary Geographic Region: United States 374,013 209,141 794 583,948 United Kingdom — 30,959 — 30,959 Other — 21,992 — 21,992 $ 374,013 $ 262,092 $ 794 $ 636,899 Three Months Ended September 30, 2019 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 118,061 $ 45,859 $ — $ 163,920 Capital raising (1) 9,855 84,087 — 93,942 Advisory fees (1) — 104,848 — 104,848 Investment banking 9,855 188,935 — 198,790 Asset management 217,616 12 — 217,628 Other 4,615 — 634 5,249 Total 350,147 234,806 634 585,587 Primary Geographic Region: United States 350,147 195,220 634 546,001 United Kingdom — 38,249 — 38,249 Other — 1,337 — 1,337 $ 350,147 $ 234,806 $ 634 $ 585,587 (1) Nine Months Ended September 30, 2020 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 373,653 $ 187,127 $ — $ 560,780 Capital raising (1) 26,443 333,442 — 359,885 Advisory fees (1) 19 254,733 — 254,752 Investment banking 26,462 588,175 — 614,637 Asset management 667,446 50 — 667,496 Other 30,104 — 2,304 32,408 Total 1,097,665 775,352 2,304 1,875,321 Primary Geographic Region: United States 1,097,665 609,328 2,304 1,709,297 United Kingdom — 110,053 — 110,053 Other — 55,971 — 55,971 $ 1,097,665 $ 775,352 $ 2,304 $ 1,875,321 Nine Months Ended September 30, 2019 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 348,272 $ 136,078 $ — $ 484,350 Capital raising (1) 28,637 218,962 — 247,599 Advisory fees (1) — 292,648 — 292,648 Investment banking 28,637 511,610 — 540,247 Asset management 624,025 41 — 624,066 Other 10,619 — 2,160 12,779 Total 1,011,553 647,729 2,160 1,661,442 Primary Geographic Region: United States 1,011,553 544,918 2,160 1,558,631 United Kingdom — 99,020 — 99,020 Other — 3,791 — 3,791 $ 1,011,553 $ 647,729 $ 2,160 $ 1,661,442 (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 September 30, 2020. 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 September 30, 2020. 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 $156.5 million and $151.3 million at September 30, 2020 and December 31, 2019, respectively. We had no significant impairments related to these receivables during the nine months ended September 30, 2020. 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 September 30, 2020 and December 31, 2019 was $15.1 million and $11.3 million, respectively.

Interest Income and Interest Ex

Interest Income and Interest Expense	9 Months Ended
	Sep. 30, 2020
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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Interest income: Loans held for investment, net $ 76,281 $ 95,436 $ 250,565 $ 284,541 Investment securities 31,966 54,945 121,630 182,127 Margin balances 5,803 13,334 22,298 40,437 Financial instruments owned 2,924 5,668 10,357 18,395 Other (2,563 ) 9,401 (894 ) 32,295 $ 114,411 $ 178,784 $ 403,956 $ 557,795 Interest expense: Bank deposits $ 1,478 $ 24,815 $ 13,324 $ 82,228 Senior notes 15,411 11,121 39,677 33,365 Federal Home Loan Bank advances 515 1,146 3,550 5,735 Other (3,582 ) 7,062 (5,288 ) 25,155 $ 13,822 $ 44,144 $ 51,263 $ 146,483

Employee Incentive, Deferred Co

Employee Incentive, Deferred Compensation, And Retirement Plans	9 Months Ended
	Sep. 30, 2020
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 6.4 million shares at September 30, 2020. 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 $39.7 million and $33.6 million for the three months ended September 30, 2020 and 2019, respectively, and $116.0 million and $97.4 million for the nine months ended September 30, 2020 and 2019, 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 September 30, 2020, there was unrecognized compensation cost for deferred awards of approximately $514.4 million, which is expected to be recognized over a weighted-average period of 2.7 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 $3.9 million and $3.2 million for the three months ended September 30, 2020 and 2019, respectively and $11.0 million and $9.6 million for the nine months ended September 30, 2020 and 2019, respectively.

Off-Balance Sheet Credit Risk

Off-Balance Sheet Credit Risk	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019, the fair value of securities accepted as collateral where we are permitted to sell or repledge the securities was $1.9 billion and $2.3 billion, respectively, and the fair value of the collateral that had been sold or repledged was $182.3 million and $391.6 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 September 30, 2020, 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 September 30, 2020 and December 31, 2019, Stifel Bancorp had outstanding commitments to originate loans aggregating $1.0 billion and $384.5 million, respectively. The commitments extended over varying periods of time, with all commitments at September 30, 2020, 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 September 30, 2020 and December 31, 2019, Stifel Bancorp had outstanding letters of credit totaling $31.1 million and $38.3 million, respectively. A majority of the standby letters of credit commitments at September 30, 2020, 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 September 30, 2020 and December 31, 2019, Stifel Bancorp had granted unused lines of credit to commercial and consumer borrowers aggregating $2.1 billion and $1.5 billion, respectively. Effective January 1, 2020, we adopted the new accounting standard for credit losses that requires evaluation of our loan portfolio for any expected losses with recognition of an allowance for credit losses, when applicable. For more information, see Note 1 – Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies. Upon the adoption of the new accounting standard, we recorded a reserve for unfunded commitments of $20.4 million, which is included in accounts payable and accrued expenses in the consolidated statements of financial condition. At September 30, 2020, the expected credit losses for unfunded lending commitments was $21.2 million.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Reporting	NOTE 2 1 – 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 and nine months ended September 30, 2020 and 2019 is as follows (in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net revenues: (1) Global Wealth Management $ 526,836 $ 534,571 $ 1,615,574 $ 1,577,614 Institutional Group 363,365 290,222 1,093,699 822,110 Other (6,901 ) (3,221 ) (17,122 ) (6,945 ) $ 883,300 $ 821,572 $ 2,692,151 $ 2,392,779 Income/(loss) before income taxes: Global Wealth Management $ 178,930 $ 202,823 $ 529,422 $ 589,665 Institutional Group 76,841 48,623 201,630 120,129 Other (97,378 ) (100,692 ) (314,593 ) (273,249 ) $ 158,393 $ 150,754 $ 416,459 $ 436,545 (1) No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2020 or 2019. The following table presents our company’s total assets on a segment basis at September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 December 31, 2019 Global Wealth Management $ 20,784,329 $ 20,675,580 Institutional Group 3,806,220 3,668,723 Other 958,633 265,922 $ 25,549,182 $ 24,610,225 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 and nine months ended September 30, 2020 and 2019, were as follows (in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 United States $ 814,301 $ 775,356 $ 2,485,336 $ 2,271,056 United Kingdom 45,705 43,632 147,097 113,783 Other 23,294 2,584 59,718 7,940 $ 883,300 $ 821,572 $ 2,692,151 $ 2,392,779

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020 and 2019 (in thousands, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net income applicable to Stifel Financial Corp. $ 120,527 $ 109,414 $ 315,003 $ 317,706 Preferred dividends 9,897 4,844 19,584 12,476 Net income available to common shareholders $ 110,630 $ 104,570 $ 295,419 $ 305,230 Shares for basic and diluted calculation: Average shares used in basic computation 70,627 71,197 70,814 72,512 Dilutive effect of stock options and units (1) 5,223 6,947 4,898 6,314 Average shares used in diluted computation 75,850 78,144 75,712 78,826 Earnings per common share: Basic $ 1.57 $ 1.47 $ 4.17 $ 4.21 Diluted $ 1.46 $ 1.34 $ 3.90 $ 3.87 (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 and nine months ended September 30, 2020 and 2019, the anti-dilutive effect from restricted stock units was immaterial. Cash Dividends During the three and nine months ended September 30, 2020, we declared and paid cash dividends of $0.17 and $0.51 per common share. During the three and nine months ended September 30, 2019, we declared and paid cash dividends of $0.15 and $0.45 per common share.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, the maximum number of shares that may yet be purchased under this plan was 8.9 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. There were no share repurchases during the three months ended September 30, 2020. During the nine months ended September 30, 2020, we repurchased $56.5 million, or 1.1 million shares using existing Board authorizations at an average price of $49.62 per share to meet obligations under our company’s employee benefit plans and for general corporate purposes. During the three months ended September 30, 2019, we repurchased $55.5 million, or 1.0 million shares using existing Board authorizations at an average price of $55.43 per share to meet obligations under our company’s employee benefit plans and for general corporate purposes. During the nine months ended September 30, 2019, we repurchased $180.4 million, or 3.3 million shares using existing Board authorizations at an average price of $ per share to meet obligations under our company’s employee benefit plans and for general corporate purposes. Issuance of Common Stock During the nine months ended September 30, 2020, we issued 1.4 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	9 Months Ended
	Sep. 30, 2020
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 $254.2 million at September 30, 2020. 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 and nine months ended September 30, 2020 and 2019. In addition, our direct investment interest in these entities is insignificant at September 30, 2020. 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	9 Months Ended
	Sep. 30, 2020
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)	9 Months Ended
	Sep. 30, 2020
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, 2019 on file with the SEC. On March 27, 2020, the Company completed the sale of Ziegler Capital Management, LLC (“ZCM”), a wholly owned asset management subsidiary. The assets and liabilities of ZCM were classified as held for sale and are included in other assets and accounts payable and accrued expenses, respectively, at December 31, 2019. See Note 8 for further information. 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. For consolidated subsidiaries that are less than wholly owned, the third-party holdings of equity interests are referred to as non-controlling interests. The portion of shareholders’ equity that is attributable to non-controlling interests for such subsidiaries is presented as non-controlling interests, a component of total equity, in the consolidated statements of financial condition. Our non-controlling interest at December 31, 2019 represented a 27.5% third-party ownership of North Shore Aviation Holdings LLC (“North Shore”), which was a consolidated subsidiary of the Company that, through its subsidiary, owns airplane engines. On February 7, 2020, North Shore entered into a Credit Agreement with North Shore Aviation Trust Series 2020-1 (the “Trust”) whereby the Trust provided North Shore with a $120.0 million credit facility. North Shore was recapitalized with funding from the issuance of the senior notes and E-Certificates by the Trust. Upon the recapitalization, Stifel Bancorp’s equity in North Shore was redeemed. We deconsolidated the related assets, liabilities, and non-controlling interests of North Shore. 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.
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies For a detailed discussion about the Company’s significant accounting policies, see Note 2, Summary of Significant Accounting Policies, in our consolidated financial statements included in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2019. During the nine months ended September 30, 2020, other than the following, there were no significant changes made to the Company’s significant accounting policies. The accounting policy changes are attributable to the adoption of the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016-13, “Financial Instruments − Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”)” on January 1, 2020. This accounting update impacts the impairment model for certain financial assets measured at amortized cost by requiring a current expected credit loss (CECL) methodology to estimate expected credit losses over the entire life of the financial asset, recorded at inception or purchase. CECL replaces the loss model currently applicable to bank loans, held-to-maturity securities, and other receivables carried at amortized cost. These credit loss policy updates are applied prospectively in our consolidated financial statements from January 1, 2020. Reported financial information for the historical comparable period was not revised and continues to be reported under the accounting standards in effect during the historical periods.
Allowance for Credit Losses	Allowance for Credit Losses The allowance for credit losses includes both the allowance for loan losses and the reserve for unfunded lending commitments and represents management’s estimate of the expected credit losses in our company’s loan portfolio. The expected credit losses on our loan portfolio are referred to as the allowance for loan losses and are reported separately as a contra-asset to loans on the consolidated statement of financial condition. 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 provision for loan losses related to the loan portfolio in the consolidated statement of operations and the provision for unfunded lending commitments are reported in the consolidated statement of operations in provision for credit losses. For loans, the expected credit loss is typically estimated using quantitative methods that consider a variety of factors such as historical loss experience derived from proxy data, the current credit quality of the portfolio as well as an economic outlook over the life of the loan. The life of the loan for closed-ended products is based on the contractual maturity of the loan adjusted for any expected prepayments. The contractual maturity includes any extension options that are at the sole discretion of the borrower. For open-ended products, the expected credit loss is determined based on the maximum repayment term associated with future draws from credit lines. In our loss forecasting framework, we incorporate forward-looking information through the use of macroeconomic scenarios applied over the forecasted life of the assets. These macroeconomic scenarios include variables that have historically been key drivers of increases and decreases in credit losses. These variables include, but are not limited to, unemployment rates, real estate prices, gross domestic product levels, corporate bond spreads and long-term interest rate forecasts. As any one economic outlook is inherently uncertain, we leverage multiple scenarios. The scenarios that are chosen each quarter and the amount of weighting given to each scenario depend on a variety of factors including recent economic events, leading economic indicators, views of internal as well as third-party economists and industry trends. The reserve for unfunded lending commitments is estimated using the same scenarios, models, and economic data as the loan portfolio. Also included in the allowance for loan losses are qualitative reserves to cover losses that are expected but, in our company’s assessment, may not be adequately represented in the quantitative methods or the economic assumptions described above. For example, factors that we consider include changes in lending policies and procedures, business conditions, the nature and size of the portfolio, portfolio concentrations, the volume and severity of past due loans and nonaccrual loans, the effect of external factors such as competition, and legal and regulatory requirements, among others. Further, we consider the inherent uncertainty in quantitative models that are built on historical data. As a result of the uncertainty inherent in the quantitative models, other quantitative and qualitative factors are considered in adjusting allowance amounts including, but not limited to the following: model imprecision, imprecision in macroeconomic scenario forecasts or changes in the economic environment affecting specific portfolio segments that deviate from the macroeconomic forecasts. Once a loan is determined to be impaired, when principal or interest becomes 90 days past due or when collection becomes uncertain, 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. Loans placed on non-accrual status are returned to accrual status when all delinquent principal and interest payments are collected and the collectability of future principal and interest payments is reasonably assured. Loan losses are charged against the allowance when we believe the uncollectibility of a loan balance is certain. Subsequent recoveries, if any, are credited to the allowance for loan loss. We do not include reserves for interest receivable in the measurement of the allowance for credit losses as we generally classify loans as nonperforming at 90 days past due and reverse interest income for these loans at that time. Large groups of smaller balance homogenous loans are collectively evaluated for impairment. Accordingly, we do not separately identify individual consumer and residential loans for impairment measurements. Impairment is measured on a loan-by-loan basis for non-homogeneous loans, and a specific allowance is established for individual loans determined to be impaired. Impairment is measured by comparing the carrying value of the impaired loan to the present value of its expected cash flow discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. See Note 7 for more information.
Available-for-Sale and Held-to-Maturity Securities	Available-for-Sale and Held-to-Maturity Securities We evaluate each available-for-sale security where the value has declined below amortized cost. If our company intends to sell or believes it is more likely than not that it will be required to sell the debt security, it is written down to fair value through earnings. For available-for-sale debt securities our company intends to hold, we evaluate the debt securities for expected credit losses except for debt securities that are guaranteed by the U.S. Treasury or U.S. government agencies where we apply a zero credit loss assumption. For the remaining available-for-sale debt securities, we consider qualitative parameters such as internal and external credit ratings and the value of underlying collateral. If an available-for-sale debt security fails any of the qualitative parameters, a discounted cash flow analysis is used by our company to determine if a portion of the unrealized loss is a result of a credit loss. Any credit losses determined are recognized as an increase to the allowance for credit losses through provision expense recorded in the consolidated statement of operations in provision for credit losses. Cash flows expected to be collected are estimated using all relevant information available such as, remaining payment terms, prepayment speeds, the financial condition of the issuer, expected defaults and the value of the underlying collateral. If any of the decline in fair value is related to market factors, that amount is recognized in accumulated other comprehensive income. In certain instances, the credit loss may exceed the total decline in fair value, in which case, the allowance recorded is limited to the difference between the amortized cost and the fair value of the asset. We separately evaluate our held-to-maturity debt securities for any credit losses. We perform a discounted cash flow analysis to estimate any credit losses which are then recognized as part of the allowance for credit losses. For available-for-sale and held-to-maturity debt securities, we have established a nonaccrual policy that results in timely write-off of accrued interest. See Note 6 for more information.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance Goodwill Impairment Testing On January 1, 2020, we adopted ASU 2017-04, which simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. Under the accounting update, the annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount, and an impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The adoption of the accounting update did not have a material impact on our consolidated financial statements. The future impact of the accounting update will depend upon the performance of our reporting units and the market conditions impacting the fair value of each reporting unit going forward. Financial Instruments – Credit Losses On January 1, 2020, we adopted ASU 2016-13 that requires the measurement of the allowance for credit losses to be based on management’s best estimate of lifetime expected credit losses inherent in the Company’s relevant financial assets. Upon adoption of the standard on January 1, 2020, we recorded a $10.4 million increase to the allowance for credit losses. The increase in the allowance is driven by the fact that the allowance under the CECL model covers expected credit losses over the full expected life of the loan portfolios and also takes into account forecasts of expected future economic conditions. The cumulative effect of adopting this standard was a decrease to retained earnings of $7.8 million (net of tax).
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform - Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The accounting standard related to contracts or hedging relationships that reference LIBOR or other reference rates that are expected to be discontinued due to reference rate reform. The accounting standard provides for optional expedients and other guidance regarding the accounting related to modifications of contracts, hedging relationships and other transactions affected by reference rate reform. We have elected to retrospectively adopt the new standard as of January 1, 2020 which resulted in no immediate impact. While reference rate reform is not expected to have a material accounting impact on our consolidated financial statements, the new standard will ease the administrative burden in accounting for the future effects of reference rate reform. 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. The accounting update is effective for interim and annual periods beginning after December 15, 2020 (January 1, 2021, for our company), and early adoption is permitted. We are currently evaluating the impact that the accounting update will have 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)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019, included (in thousands) September 30, 2020 December 31, 2019 Receivables from clearing organizations $ 208,361 $ 471,122 Deposits paid for securities borrowed 178,517 135,373 Securities failed to deliver 57,807 21,295 $ 444,685 $ 627,790
Amounts Payable To Brokers, Dealers, And Clearing Organizations	Amounts payable to brokers, dealers, and clearing organizations at September 30, 2020 and December 31, 2019, included (in thousands) September 30, 2020 December 31, 2019 Deposits received from securities loaned $ 87,352 $ 608,333 Securities failed to receive 52,322 25,256 Payable to clearing organizations 17,679 78,702 $ 157,353 $ 712,291

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value	September 30, 2020 December 31, 2019 Fair value of investments Unfunded commitments Fair value of investments Unfunded commitments Money market funds $ 106,207 $ — $ 25,734 $ — Mutual funds 6,152 — 7,875 — Private equity funds 1,538 1,203 2,288 1,203 Partnership interests 3,221 895 3,058 953 Total $ 117,118 $ 2,098 $ 38,955 $ 2,156
Fair Value Of Assets And Liabilities Measured On Recurring Basis	September 30, 2020 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 42,444 $ 42,444 $ — $ — U.S. government agency securities 117,805 — 117,805 — Mortgage-backed securities: Agency 215,333 — 215,333 — Non-agency 1,197 — 1,197 — Asset-backed securities 44 — 35 9 Corporate securities: Fixed income securities 219,734 1,167 218,567 — Equity securities 71,387 67,093 4,294 — Sovereign debt 3,069 — 3,069 — State and municipal securities 143,201 — 143,201 — Loans 5,501 — — 5,501 Total financial instruments owned 819,715 110,704 703,501 5,510 Available-for-sale securities: U.S. government agency securities 4,630 — 4,630 — State and municipal securities 2,459 — 2,459 — Mortgage-backed securities: Agency 682,174 — 682,174 — Commercial 97,821 — 97,821 — Non-agency 6,779 — 6,779 — Corporate fixed income securities 605,555 — 605,555 — Asset-backed securities 1,424,840 — 1,424,840 — Total available-for-sale securities 2,824,258 — 2,824,258 — Investments: Corporate equity securities 24,925 23,865 — 1,060 Auction rate securities: Equity securities 12,615 — — 12,615 Municipal securities 183 — — 183 Other 59,778 9,749 15,028 35,001 Investments in funds and partnerships measured at NAV 10,911 Total investments 108,412 33,614 15,028 48,859 Cash equivalents measured at NAV 106,207 $ 3,858,592 $ 144,318 $ 3,542,787 $ 54,369 September 30, 2020 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 220,510 $ 220,510 $ — $ — U.S. government agency securities 6,265 — 6,265 — Agency mortgage-backed securities 135,005 — 135,005 — Corporate securities: Fixed income securities 177,744 1,495 176,249 — Equity securities 42,017 42,017 — — Sovereign debt 18,393 — 18,393 — Total financial instruments sold, but not yet purchased $ 599,934 $ 264,022 $ 335,912 $ — Assets and liabilities measured at fair value on a recurring basis as of December 31, 2019, are presented below (in thousands) December 31, 2019 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 9,266 $ 9,266 $ — $ — U.S. government agency securities 66,881 — 66,881 — Mortgage-backed securities: Agency 388,856 — 388,856 — Non-agency 5,155 — 5,155 — Asset-backed securities 28,385 — 28,210 175 Corporate securities: Fixed income securities 250,783 872 249,911 — Equity securities 64,009 61,579 2,430 — Sovereign debt 12,403 — 12,403 — State and municipal securities 137,211 — 137,211 — Loans 9,983 — 832 9,151 Total financial instruments owned 972,932 71,717 891,889 9,326 Available-for-sale securities: U.S. government agency securities 5,067 — 5,067 — State and municipal securities 24,297 — 24,297 — Mortgage-backed securities: Agency 837,878 — 837,878 — Commercial 109,537 — 109,537 — Non-agency 9,758 — 9,758 — Corporate fixed income securities 675,311 — 675,311 — Asset-backed securities 1,592,889 — 1,592,889 — Total available-for-sale securities 3,254,737 — 3,254,737 — Investments: Corporate equity securities 35,083 34,023 — 1,060 Auction rate securities: Equity securities 14,243 — — 14,243 Municipal securities 654 — 470 184 Other 16,771 9,905 6,013 853 Investments in funds and partnerships measured at NAV 13,221 Total investments 79,972 43,928 6,483 16,340 Cash equivalents measured at NAV 25,734 Derivative contracts (1) 1,086 — 1,086 — $ 4,334,461 $ 115,645 $ 4,154,195 $ 25,666 (1) December 31, 2019 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 243,570 $ 243,570 $ — $ — U.S. government agency securities 1,000 — 1,000 — Agency mortgage-backed securities 231,909 — 231,909 — Corporate securities: Fixed income securities 140,100 633 139,467 — Equity securities 32,047 32,047 — — Sovereign debt 13,271 — 13,271 — Loans 955 — — 955 Total financial instruments sold, but not yet purchased $ 662,852 $ 276,250 $ 385,647 $ 955
Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments	Three Months Ended September 30, 2020 Financial instruments owned Investments Asset-Backed Securities Loans Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at June 30, 2020 $ 175 $ 9,611 $ 1,060 $ 12,621 $ 183 $ 35,001 Unrealized gains/(losses) (166 ) 690 — (6 ) — — Purchases — 667 — — — — Sales — (4,467 ) — — — — Redemptions — (1,000 ) — — — — Net change (166 ) (4,110 ) — (6 ) — — Balance at September 30, 2020 $ 9 $ 5,501 $ 1,060 $ 12,615 $ 183 $ 35,001 Nine Months Ended September 30, 2020 Financial instruments owned Investments Asset-Backed Securities Loans Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2019 $ 175 $ 9,151 $ 1,060 $ 14,243 $ 184 $ 853 Unrealized losses (166 ) (2,923 ) — (1,628 ) (1 ) (478 ) Purchases — 7,748 — — — — Sales — (7,472 ) — — — (20 ) Redemptions — (1,003 ) — — — — Transfers into Level 3 — — — — — 34,646 Net change (166 ) (3,650 ) — (1,628 ) (1 ) 34,148 Balance at September 30, 2020 $ 9 $ 5,501 $ 1,060 $ 12,615 $ 183 $ 35,001
Schedule Of Fair Value Of Financial Instruments	September 30, 2020 December 31, 2019 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 1,716,570 $ 1,716,570 $ 1,142,596 $ 1,142,596 Cash segregated for regulatory purposes 154,374 154,374 131,374 131,374 Securities purchased under agreements to resell 436,860 436,860 385,008 385,008 Financial instruments owned 819,715 819,715 972,932 972,932 Available-for-sale securities 2,824,258 2,824,258 3,254,737 3,254,737 Held-to-maturity securities 3,397,713 3,335,033 2,856,219 2,827,883 Bank loans 10,650,760 10,721,120 9,624,042 9,801,986 Loans held for sale 281,475 281,475 389,693 389,693 Investments 108,412 108,412 79,972 79,972 Derivative contracts (1) — — 1,086 1,086 Financial liabilities: Securities sold under agreements to repurchase $ 182,271 $ 182,271 $ 391,634 $ 391,634 Bank deposits 16,400,001 16,198,251 15,332,581 14,467,894 Financial instruments sold, but not yet purchased 599,934 599,934 662,852 662,852 Federal Home Loan Bank advances — — 250,000 250,000 Senior notes 1,412,005 1,560,013 1,017,010 1,069,425 Debentures to Stifel Financial Capital Trusts 60,000 39,338 60,000 45,847 (1)
Estimated Fair Values Of Financial Instruments Not Measured At Fair Value	September 30, 2020 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,610,363 $ 1,610,363 $ — $ — Cash segregated for regulatory purposes 154,374 154,374 — — Securities purchased under agreements to resell 436,860 337,095 99,765 — Held-to-maturity securities 3,335,033 — 3,179,239 155,794 Bank loans 10,721,120 — 10,721,120 — Loans held for sale 281,475 — 281,475 — Financial liabilities: Securities sold under agreements to repurchase $ 182,271 $ — $ 182,271 $ — Bank deposits 16,198,251 — 16,198,251 — Senior notes 1,560,013 1,560,013 — — Debentures to Stifel Financial Capital Trusts 39,338 — — 39,338 December 31, 2019 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,116,862 $ 1,116,862 $ — $ — Cash segregated for regulatory purposes 131,374 131,374 — — Securities purchased under agreements to resell 385,008 342,132 42,876 — Held-to-maturity securities 2,827,883 — 2,666,773 161,110 Bank loans 9,801,986 — 9,801,986 — Loans held for sale 389,693 — 389,693 — Financial liabilities: Securities sold under agreements to repurchase $ 391,634 $ 22,205 $ 369,429 $ — Bank deposits 14,467,894 — 14,467,894 — Federal Home Loan Bank advances 250,000 250,000 — — Senior notes 1,069,425 1,069,425 — — Debentures to Stifel Financial Capital Trusts 45,847 — — 45,847

Financial Instruments Owned A_2

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 are as follows (in thousands) September 30, 2020 December 31, 2019 Financial instruments owned: U.S. government securities $ 42,444 $ 9,266 U.S. government agency securities 117,805 66,881 Mortgage-backed securities: Agency 215,333 388,856 Non-agency 1,197 5,155 Asset-backed securities 44 28,385 Corporate securities: Fixed income securities 219,734 250,783 Equity securities 71,387 64,009 Sovereign debt 3,069 12,403 State and municipal securities 143,201 137,211 Loans 5,501 9,983 $ 819,715 $ 972,932 Financial instruments sold, but not yet purchased: U.S. government securities $ 220,510 $ 243,570 U.S. government agency securities 6,265 1,000 Agency mortgage-backed securities 135,005 231,909 Corporate securities: Fixed income securities 177,744 140,100 Equity securities 42,017 32,047 Sovereign debt 18,393 13,271 Loans — 955 $ 599,934 $ 662,852

Available-For-Sale And Held-T_2

Available-For-Sale And Held-To-Maturity Securities (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,540 $ 90 $ — $ 4,630 State and municipal securities 2,401 58 — 2,459 Mortgage-backed securities: Agency 664,899 17,491 (216 ) 682,174 Commercial 93,864 3,957 — 97,821 Non-agency 6,793 70 (84 ) 6,779 Corporate fixed income securities 581,249 24,349 (43 ) 605,555 Asset-backed securities 1,438,951 3,502 (17,613 ) 1,424,840 $ 2,792,697 $ 49,517 $ (17,956 ) $ 2,824,258 Held-to-maturity securities (2) Asset-backed securities $ 3,397,713 $ 3,415 $ (66,095 ) $ 3,335,033 December 31, 2019 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,028 $ 39 $ — $ 5,067 State and municipal securities 24,198 99 — 24,297 Mortgage-backed securities: Agency 840,659 3,070 (5,851 ) 837,878 Commercial 109,982 269 (714 ) 109,537 Non-agency 9,731 50 (23 ) 9,758 Corporate fixed income securities 664,028 11,283 — 675,311 Asset-backed securities 1,600,415 679 (8,205 ) 1,592,889 $ 3,254,041 $ 15,489 $ (14,793 ) $ 3,254,737 Held-to-maturity securities (2) Asset-backed securities $ 2,856,219 $ 5,960 $ (34,296 ) $ 2,827,883 (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 September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 December 31, 2019 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Available-for-sale securities Within one year $ 152,731 $ 154,255 $ 6,861 $ 6,871 After one year through three years 85,773 88,263 229,184 229,760 After three years through five years 302,285 320,037 422,236 429,909 After five years through ten years 528,866 527,815 409,664 411,680 After ten years 1,723,042 1,733,888 2,186,096 2,176,517 $ 2,792,697 $ 2,824,258 $ 3,254,041 $ 3,254,737 Held-to-maturity securities After three years through five years $ 6,537 $ 6,533 $ — $ — After five years through ten years 1,302,344 1,281,809 598,250 597,166 After ten years 2,088,832 2,046,691 2,257,969 2,230,717 $ 3,397,713 $ 3,335,033 $ 2,856,219 $ 2,827,883
Contractual Maturities	The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at September 30, 2020, 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 $ 2,318 $ 2,312 $ — $ — $ 4,630 State and municipal securities — — 2,459 — 2,459 Mortgage-backed securities: Agency 11 444 24,017 657,702 682,174 Commercial 18,656 22 — 79,143 97,821 Non-agency 6,066 — — 713 6,779 Corporate fixed income securities 127,204 405,522 55,732 17,097 605,555 Asset-backed securities — — 445,607 979,233 1,424,840 $ 154,255 $ 408,300 $ 527,815 $ 1,733,888 $ 2,824,258 Held-to-maturity securities Asset-backed securities $ — $ 6,537 $ 1,302,344 $ 2,088,832 $ 3,397,713 (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 September 30, 2020 (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 $ (118 ) $ 6,797 $ (98 ) $ 10,191 $ (216 ) $ 16,988 Non-agency — — (84 ) 713 (84 ) 713 Corporate fixed income securities (43 ) 13,956 — — (43 ) 13,956 Asset-backed securities (8,016 ) 668,379 (9,597 ) 622,139 (17,613 ) 1,290,518 $ (8,177 ) $ 689,132 $ (9,779 ) $ 633,043 $ (17,956 ) $ 1,322,175
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 September 30, 2020 (in thousands) AAA AA A C Total Held-to-maturity securities Asset-backed securities $ 423,043 $ 2,956,572 $ 15,500 $ 2,598 $ 3,397,713

Bank Loans (Tables)

Bank Loans (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio	September 30, 2020 December 31, 2019 Balance Percent Balance Percent Commercial and industrial $ 4,080,939 37.9 % $ 3,438,953 35.3 % Residential real estate 3,804,836 35.4 3,309,548 33.9 Securities-based loans 1,841,516 17.1 2,098,211 21.5 Commercial real estate 386,957 3.6 428,549 4.4 Construction and land 532,319 5.0 398,839 4.1 Home equity lines of credit 67,386 0.6 51,205 0.5 Other 39,735 0.4 27,311 0.3 Gross bank loans 10,753,688 100.0 % 9,752,616 100.0 % Unamortized loan discount, net (2,260 ) (6,588 ) Loans in process 13,398 (27,717 ) Unamortized loan fees, net 47 1,310 Allowance for loan losses (114,113 ) (95,579 ) Loans held for investment, net $ 10,650,760 $ 9,624,042
Activity In The Allowance For Loan Losses By Portfolio Segment	Three Months Ended September 30, 2020 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 65,503 $ 10,303 $ (1 ) $ 4 $ 75,809 Residential real estate 24,043 (6,360 ) — — 17,683 Construction and land 13,075 (2,889 ) — — 10,186 Commercial real estate 10,647 (2,730 ) — — 7,917 Securities-based loans 1,807 95 — — 1,902 Home equity lines of credit 499 (205 ) — 87 381 Other 247 9 (22 ) 1 235 $ 115,821 $ (1,777 ) $ (23 ) $ 92 $ 114,113 Nine Months Ended September 30, 2020 Beginning Balance CECL Adoption Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 69,949 $ (19,940 ) $ 25,949 $ (153 ) $ 4 $ 75,809 Residential real estate 14,253 3,499 (69 ) — — 17,683 Construction and land 4,613 2,674 2,899 — — 10,186 Commercial real estate 3,564 791 3,562 — — 7,917 Securities-based loans 2,361 1,346 (1,805 ) — — 1,902 Home equity lines of credit 442 39 (188 ) — 88 381 Other 194 58 21 (40 ) 2 235 Unallocated 203 (203 ) — — — — $ 95,579 $ (11,736 ) $ 30,369 $ (193 ) $ 94 $ 114,113 Three Months Ended September 30, 2019 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 69,263 $ (1,070 ) $ (21 ) $ — $ 68,172 Residential real estate 12,042 519 — 1 12,562 Securities-based loans 2,311 (130 ) — — 2,181 Commercial real estate 2,478 425 — — 2,903 Construction and land 2,402 865 — — 3,267 Home equity lines of credit 421 13 — 1 435 Other 179 38 (35 ) 13 195 Unallocated 1,376 269 — — 1,645 $ 90,472 $ 929 $ (56 ) $ 15 $ 91,360 Nine Months Ended September 30, 2019 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 68,367 $ (116 ) $ (79 ) $ — $ 68,172 Residential real estate 11,228 1,246 — 88 12,562 Securities-based loans 1,978 203 — — 2,181 Commercial real estate 1,778 1,125 — — 2,903 Construction and land 1,241 2,026 — — 3,267 Home equity lines of credit 310 123 — 2 435 Other 88 156 (87 ) 38 195 Unallocated 843 802 — — 1,645 $ 85,833 $ 5,565 $ (166 ) $ 128 $ 91,360
Recorded Balances Of Loans and Amount Of Allowance Allocated Based Upon Impairment Method by Portfolio Segment	Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial and industrial $ 8,158 $ 67,651 $ 75,809 $ 13,084 $ 4,067,855 $ 4,080,939 Residential real estate 24 17,659 17,683 1,409 3,803,427 3,804,836 Securities-based loans — 1,902 1,902 — 1,841,516 1,841,516 Commercial real estate — 7,917 7,917 — 386,957 386,957 Construction and land — 10,186 10,186 — 532,319 532,319 Home equity lines of credit — 381 381 — 67,386 67,386 Other — 235 235 — 39,735 39,735 $ 8,182 $ 105,931 $ 114,113 $ 14,493 $ 10,739,195 $ 10,753,688 Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial and industrial $ 8,158 $ 61,791 $ 69,949 $ 12,991 $ 3,425,962 $ 3,438,953 Residential real estate 24 14,229 14,253 1,412 3,308,136 3,309,548 Securities-based loans — 2,361 2,361 — 2,098,211 2,098,211 Commercial real estate — 3,564 3,564 — 428,549 428,549 Construction and land — 4,613 4,613 — 398,839 398,839 Home equity lines of credit — 442 442 184 51,021 51,205 Other — 194 194 — 27,311 27,311 Unallocated — 203 203 — — — $ 8,182 $ 87,397 $ 95,579 $ 14,587 $ 9,738,029 $ 9,752,616
Loans That Were Individually Evaluated For Impairment By Portfolio Segment	September 30, 2020 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 13,084 $ — $ 13,084 $ 13,084 $ 8,158 $ 13,085 Residential real estate 1,409 1,249 160 1,409 24 1,499 Home equity lines of credit — — — — — 61 Other 150 — — — — — Total $ 14,643 $ 1,249 $ 13,244 $ 14,493 $ 8,182 $ 14,645 December 31, 2019 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 12,991 $ 51 $ 12,940 $ 12,991 $ 8,158 $ 14,172 Residential real estate 1,412 1,412 — 1,412 24 1,231 Home equity lines of credit 184 184 — 184 — 184 Other 150 — — — — — Total $ 14,737 $ 1,647 $ 12,940 $ 14,587 $ 8,182 $ 15,587
Aging Of The Recorded Investment In Past Due Loans	As of September 30, 2020 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Commercial and industrial $ 144 $ 12,940 $ 13,084 $ 4,067,855 $ 4,080,939 Residential real estate 3,290 1,337 4,627 3,800,209 3,804,836 Securities-based loans — — — 1,841,516 1,841,516 Commercial real estate — — — 386,957 386,957 Construction and land — — — 532,319 532,319 Home equity lines of credit 686 — 686 66,700 67,386 Other 25 — 25 39,710 39,735 Total $ 4,145 $ 14,277 $ 18,422 $ 10,735,266 $ 10,753,688 As of September 30, 2020* Non-Accrual Restructured Nonperforming loans with no allowance Total Commercial and industrial $ 13,084 $ — $ — $ 13,084 Residential real estate — 160 1,249 1,409 Total $ 13,084 $ 160 $ 1,249 $ 14,493 * There were no loans past due 90 days and still accruing interest at September 30, 2020. As of December 31, 2019 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ — $ 12,940 $ 12,940 $ 3,426,013 $ 3,438,953 Residential real estate 10,476 1,249 11,725 3,297,823 3,309,548 Securities-based loans — — — 2,098,211 2,098,211 Commercial real estate — — — 428,549 428,549 Construction and land — — — 398,839 398,839 Home equity lines of credit 83 184 267 50,938 51,205 Other 5 — 5 27,306 27,311 Total $ 10,564 $ 14,373 $ 24,937 $ 9,727,679 $ 9,752,616 As of December 31, 2019* Non-Accrual Restructured Total Commercial and industrial $ 12,940 $ — $ 12,940 Residential real estate 1,249 163 1,412 Home equity lines of credit 184 — 184 Total $ 14,373 $ 163 $ 14,536 * There were no loans past due 90 days and still accruing interest at December 31, 2019.
Risk Category Of Loan Portfolio	As of September 30, 2020 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,791,192 $ 120,663 $ 156,144 $ 12,940 $ 4,080,939 Residential real estate 3,802,942 645 — 1,249 3,804,836 Securities-based loans 1,841,516 — — — 1,841,516 Commercial real estate 385,645 1,168 144 — 386,957 Construction and land 498,079 14,240 20,000 — 532,319 Home equity lines of credit 66,920 466 — — 67,386 Other 39,735 — — — 39,735 Total $ 10,426,029 $ 137,182 $ 176,288 $ 14,189 $ 10,753,688 As of December 31, 2019 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,365,800 $ 48,241 $ 11,972 $ 12,940 $ 3,438,953 Residential real estate 3,307,719 417 1,412 — 3,309,548 Securities-based loans 2,098,211 — — — 2,098,211 Commercial real estate 427,963 586 — — 428,549 Construction and land 398,839 — — — 398,839 Home equity lines of credit 51,021 — 184 — 51,205 Other 27,311 — — — 27,311 Total $ 9,676,864 $ 49,244 $ 13,568 $ 12,940 $ 9,752,616
Schedule of Term Loans Amortized Cost Basis by Origination Year and Revolving Cost Amortized Cost Basis	Term Loans Amortized Cost Basis by Origination Year – September 30, 2020 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Total Commercial and industrial: Pass $ 466,481 $ 105,957 $ 2,355,918 $ 19,375 $ 11,154 $ 47,763 $ 784,544 $ 3,791,192 Special Mention — — 106,214 — — — 14,449 120,663 Substandard — — 146,584 — — 27 9,533 156,144 Doubtful — — — 12,940 — — — 12,940 $ 466,481 $ 105,957 $ 2,608,716 $ 32,315 $ 11,154 $ 47,790 $ 808,526 $ 4,080,939 Residential real estate: Pass $ 1,217,617 $ 964,320 $ 412,590 $ 326,393 $ 303,909 $ 578,113 $ — $ 3,802,942 Special Mention — — — 645 — — — 645 Substandard — — — — — — — — Doubtful — — — 149 — 1,100 — 1,249 $ 1,217,617 $ 964,320 $ 412,590 $ 327,187 $ 303,909 $ 579,213 $ — $ 3,804,836 Securities-based loans: Pass $ 21,968 $ 108,647 $ 25,825 $ 195 $ 300 $ 56,691 $ 1,627,890 $ 1,841,516 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ 21,968 $ 108,647 $ 25,825 $ 195 $ 300 $ 56,691 $ 1,627,890 $ 1,841,516 Commercial real estate: Pass $ 74,689 $ 158,422 $ 42,432 $ 52,387 $ 13,470 $ 43,469 $ 776 $ 385,645 Special Mention — — — — 1,168 — — 1,168 Substandard — — 144 — — — — 144 Doubtful — — — — — — — — $ 74,689 $ 158,422 $ 42,576 $ 52,387 $ 14,638 $ 43,469 $ 776 $ 386,957 Construction and land: Pass $ 44,892 $ 254,524 $ 111,147 $ 68,495 $ 6,852 $ 1,370 $ 10,799 $ 498,079 Special Mention — — 14,240 — — — — 14,240 Substandard — — 20,000 — — — — 20,000 Doubtful — — — — — — — — $ 44,892 $ 254,524 $ 145,387 $ 68,495 $ 6,852 $ 1,370 $ 10,799 $ 532,319 Home equity lines of credit: Pass $ — $ — $ — $ — $ — $ — $ 66,920 $ 66,920 Special Mention — — — — — — 466 466 Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ — $ — $ — $ — $ 67,386 $ 67,386 Other: Pass $ — $ — $ 6 $ — $ 755 $ 20,049 $ 18,925 $ 39,735 Special Mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — $ — $ — $ 6 $ — $ 755 $ 20,049 $ 18,925 $ 39,735

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2019 Adjustments Sale of ZCM September 30, 2020 Goodwill Global Wealth Management $ 344,981 $ — $ (9,972 ) $ 335,009 Institutional Group 849,093 (2,104 ) — 846,989 $ 1,194,074 $ (2,104 ) $ (9,972 ) $ 1,181,998 December 31, 2019 Adjustments/ Sale of ZCM Amortization September 30, 2020 Intangible assets Global Wealth Management $ 53,279 $ (1,532 ) $ (5,006 ) $ 46,741 Institutional Group 108,494 (280 ) (9,483 ) 98,731 $ 161,773 $ (1,812 ) $ (14,489 ) $ 145,472
Intangible Assets	Intangible assets as of September 30, 2020 and December 31, 2019 were as follows (in thousands) September 30, 2020 December 31, 2019 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 203,188 $ 82,990 $ 207,253 $ 75,987 Trade names 28,659 15,196 28,659 13,649 Core deposits 8,615 4,387 8,615 2,985 Non-compete agreements 9,240 3,825 9,490 2,828 Investment banking backlog 840 303 4,245 1,787 Acquired technology 4,045 2,414 840 93 $ 254,587 $ 109,115 $ 259,102 $ 97,329
Amortization Expense In Future Periods	As of September 30, 2020, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2020 $ 4,630 2021 17,769 2022 16,444 2023 14,619 2024 13,958 Thereafter 75,934 $ 143,354

Senior Notes (Tables)

Senior Notes (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Summary of Senior Notes	The following table summarizes our senior notes as of September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 December 31, 2019 4.25% senior notes, due 2024 (1) $ 500,000 $ 500,000 3.50% senior notes, due 2020 (2) 300,000 300,000 5.20% senior notes, due 2047 (3) 225,000 225,000 4.00% senior notes, due 2030 (4) 400,000 — 1,425,000 1,025,000 Debt issuance costs, net (12,995 ) (7,990 ) Senior notes, net $ 1,412,005 $ 1,017,010 (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 December 2015, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 3.50% senior notes due December 2020 (3) October 2047 (4) 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
Schedule of Corporate Date Maturity	Our senior notes mature as follows, based upon contractual terms (in thousands) 2020 $ 300,000 2021 — 2022 — 2023 — 2024 500,000 Thereafter 625,000 $ 1,425,000

Bank Deposits (Tables)

Bank Deposits (Tables)	9 Months Ended
	Sep. 30, 2020
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Schedule of Deposits	Deposits consist of money market and savings accounts, certificates of deposit, and demand deposits. Deposits at September 30, 2020 and December 31, 2019 were as follows (in thousands) September 30, 2020 December 31, 2019 Money market and savings accounts $ 15,653,048 $ 13,530,670 Demand deposits (interest-bearing) 363,999 1,113,296 Demand deposits (non-interest-bearing) 271,056 165,657 Certificates of deposit 111,898 522,958 $ 16,400,001 $ 15,332,581
Schedule of Maturities of Certificates of Deposit	Scheduled maturities of certificates of deposit at September 30, 2020 and December 31, 2019 were as follows (in thousands): September 30, 2020 December 31, 2019 Certificates of deposit, less than $100,000: Within one year $ 3,120 $ 5,305 One to three years 244 360 Three to five years 13 13 $ 3,377 $ 5,678 Certificates of deposit, $100,000 and greater: Within one year $ 74,158 $ 441,341 One to three years 34,163 68,855 Three to five years 200 7,084 108,521 517,280 $ 111,898 $ 522,958

Disclosures About Offsetting _2

Disclosures About Offsetting Assets And Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Offsetting [Abstract]
Financial Assets And Derivative Assets That Are Subject to Offset	The following table provides information about financial assets and derivative assets that are subject to offset as of September 30, 2020 and December 31, 2019 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts Presented in the of Financial Condition Amounts available for offset Available collateral Net Amount As of September 30, 2020: Securities borrowing (1) $ 178,517 $ — $ 178,517 $ (31,528 ) $ (127,965 ) $ 19,024 Reverse repurchase agreements (2) 436,860 — 436,860 (48,594 ) (384,970 ) 3,296 $ 615,377 $ — $ 615,377 $ (80,122 ) $ (512,935 ) $ 22,320 As of December 31, 2019: Securities borrowing (1) $ 135,373 $ — $ 135,373 $ (52,319 ) $ (74,760 ) $ 8,294 Reverse repurchase agreements (2) 385,008 — 385,008 (59,892 ) (325,096 ) 20 Cash flow interest rate contracts 1,086 — 1,086 — — 1,086 $ 521,467 $ — $ 521,467 $ (112,211 ) $ (399,856 ) $ 9,400 (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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively.
Financial Liabilities And Derivative Liabilities That Are Subject To Offset	The following table provides information about financial liabilities and derivative liabilities that are subject to offset as of September 30, 2020 and December 31, 2019 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Liabilities Gross Amounts Offset in the of Financial Condition Net Amounts Presented in the Statement of Financial Condition Amounts available for offset Collateral Pledged Net Amount As of September 30, 2020: Securities lending (3) $ (87,352 ) $ — $ (87,352 ) $ 31,528 $ 55,802 $ (22 ) Repurchase agreements (4) (182,271 ) — (182,271 ) 48,594 133,677 — $ (269,623 ) $ — $ (269,623 ) $ 80,122 $ 189,479 $ (22 ) As of December 31, 2019: Securities lending (3) $ (608,333 ) $ — $ (608,333 ) $ 52,319 $ 555,782 $ (232 ) Repurchase agreements (4) (391,634 ) — (391,634 ) 59,892 331,742 — $ (999,967 ) $ — $ (999,967 ) $ 112,211 $ 887,524 $ (232 ) (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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively.

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2020
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 $ 2,197,654 15.4 % $ 640,212 4.5 % $ 924,750 6.5 % Tier 1 capital 2,732,654 19.2 % 853,616 6.0 % 1,138,154 8.0 % Total capital 2,888,681 20.3 % 1,138,154 8.0 % 1,422,693 10.0 % Tier 1 leverage 2,732,654 11.3 % 971,609 4.0 % 1,214,512 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 $ 1,034,480 11.7 % $ 397,280 4.5 % $ 573,849 6.5 % Tier 1 capital 1,034,480 11.7 % 529,707 6.0 % 706,276 8.0 % Total capital 1,144,843 13.0 % 706,276 8.0 % 882,845 10.0 % Tier 1 leverage 1,034,480 7.2 % 578,347 4.0 % 722,934 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 $ 201,106 18.0 % $ 50,266 4.5 % $ 72,606 6.5 % Tier 1 capital 201,106 18.0 % 67,021 6.0 % 89,361 8.0 % Total capital 215,097 19.3 % 89,361 8.0 % 111,701 10.0 % Tier 1 leverage 201,106 7.3 % 110,807 4.0 % 138,508 5.0 %

Operating Leases (Tables)

Operating Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Lessee Disclosure [Abstract]
Schedule of Net Lease Cost	The table below summarizes our net lease cost for the three and nine months ended September 30 , 2020 and 2019 (in thousands) : Three Months Ended September 30, 2020 2019 Operating lease cost $ 25,251 $ 22,921 Short-term lease cost 590 403 Variable lease cost 20 54 Sublease income (997 ) (1,244 ) Net lease cost $ 24,864 $ 22,134 Nine Months Ended September 30, 2020 2019 Operating lease cost $ 73,172 $ 68,081 Short-term lease cost 2,892 1,152 Variable lease cost 62 88 Sublease income (2,901 ) (3,729 ) Net lease cost $ 73,225 $ 65,592 The table below summarizes other information related to our operating leases as of and for the three months ended September 30, 2020 (in thousands) Operating lease cash flows $ 63,724 Weighted-average remaining lease term 12.1 years Weighted-average discount rate 4.32 %
Schedule of Information About Operating Lease Liabilities	The table below presents information about operating lease liabilities as of September 30, 2020, (in thousands, except percentages) Remainder of 2020 $ 21,202 2021 92,043 2022 94,084 2023 93,289 2024 92,127 Thereafter 686,863 Total undiscounted lease payments 1,079,608 Imputed interest (268,582 ) Total operating lease liabilities $ 811,026

Revenues from Contracts with _2

Revenues from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Schedule of Total Revenues Broken Out by 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 and nine months ended September 30, 2020 and 2019 (in thousands) Three Months Ended September 30, 2020 2019 Revenues from contracts with customers: Commissions $ 172,654 $ 163,920 Investment banking 218,134 198,790 Asset management and service fees 230,782 217,628 Other 15,329 5,249 Total revenue from contracts with customers 636,899 585,587 Other sources of revenue: Interest 114,411 178,784 Principal transactions 140,883 97,847 Other 4,929 3,498 Total revenues $ 897,122 $ 865,716 Nine Months Ended September 30, 2020 2019 Revenues from contracts with customers: Commissions $ 560,780 $ 484,350 Investment banking 614,637 540,247 Asset management and service fees 667,496 624,066 Other 32,408 12,779 Total revenue from contracts with customers 1,875,321 1,661,442 Other sources of revenue: Interest 403,956 557,795 Principal transactions 445,566 298,343 Other 18,571 21,682 Total revenues $ 2,743,414 $ 2,539,262
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 and nine months ended September 30, 2020 and 2019 (in thousands) Three Months Ended September 30, 2020 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions (1) $ 120,600 $ 52,054 $ — $ 172,654 Capital raising (1) 8,113 129,179 — 137,292 Advisory fees (1) — 80,842 — 80,842 Investment banking 8,113 210,021 — 218,134 Asset management 230,765 17 — 230,782 Other 14,535 — 794 15,329 Total 374,013 262,092 794 636,899 Primary Geographic Region: United States 374,013 209,141 794 583,948 United Kingdom — 30,959 — 30,959 Other — 21,992 — 21,992 $ 374,013 $ 262,092 $ 794 $ 636,899 Three Months Ended September 30, 2019 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 118,061 $ 45,859 $ — $ 163,920 Capital raising (1) 9,855 84,087 — 93,942 Advisory fees (1) — 104,848 — 104,848 Investment banking 9,855 188,935 — 198,790 Asset management 217,616 12 — 217,628 Other 4,615 — 634 5,249 Total 350,147 234,806 634 585,587 Primary Geographic Region: United States 350,147 195,220 634 546,001 United Kingdom — 38,249 — 38,249 Other — 1,337 — 1,337 $ 350,147 $ 234,806 $ 634 $ 585,587 (1) Nine Months Ended September 30, 2020 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 373,653 $ 187,127 $ — $ 560,780 Capital raising (1) 26,443 333,442 — 359,885 Advisory fees (1) 19 254,733 — 254,752 Investment banking 26,462 588,175 — 614,637 Asset management 667,446 50 — 667,496 Other 30,104 — 2,304 32,408 Total 1,097,665 775,352 2,304 1,875,321 Primary Geographic Region: United States 1,097,665 609,328 2,304 1,709,297 United Kingdom — 110,053 — 110,053 Other — 55,971 — 55,971 $ 1,097,665 $ 775,352 $ 2,304 $ 1,875,321 Nine Months Ended September 30, 2019 (1) Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 348,272 $ 136,078 $ — $ 484,350 Capital raising (1) 28,637 218,962 — 247,599 Advisory fees (1) — 292,648 — 292,648 Investment banking 28,637 511,610 — 540,247 Asset management 624,025 41 — 624,066 Other 10,619 — 2,160 12,779 Total 1,011,553 647,729 2,160 1,661,442 Primary Geographic Region: United States 1,011,553 544,918 2,160 1,558,631 United Kingdom — 99,020 — 99,020 Other — 3,791 — 3,791 $ 1,011,553 $ 647,729 $ 2,160 $ 1,661,442 (1)

Interest Income and Interest _2

Interest Income and Interest Expense (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Interest income: Loans held for investment, net $ 76,281 $ 95,436 $ 250,565 $ 284,541 Investment securities 31,966 54,945 121,630 182,127 Margin balances 5,803 13,334 22,298 40,437 Financial instruments owned 2,924 5,668 10,357 18,395 Other (2,563 ) 9,401 (894 ) 32,295 $ 114,411 $ 178,784 $ 403,956 $ 557,795 Interest expense: Bank deposits $ 1,478 $ 24,815 $ 13,324 $ 82,228 Senior notes 15,411 11,121 39,677 33,365 Federal Home Loan Bank advances 515 1,146 3,550 5,735 Other (3,582 ) 7,062 (5,288 ) 25,155 $ 13,822 $ 44,144 $ 51,263 $ 146,483

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule Of Operating Information, Segment	Information concerning operations in these segments of business for the three and nine months ended September 30, 2020 and 2019 is as follows (in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net revenues: (1) Global Wealth Management $ 526,836 $ 534,571 $ 1,615,574 $ 1,577,614 Institutional Group 363,365 290,222 1,093,699 822,110 Other (6,901 ) (3,221 ) (17,122 ) (6,945 ) $ 883,300 $ 821,572 $ 2,692,151 $ 2,392,779 Income/(loss) before income taxes: Global Wealth Management $ 178,930 $ 202,823 $ 529,422 $ 589,665 Institutional Group 76,841 48,623 201,630 120,129 Other (97,378 ) (100,692 ) (314,593 ) (273,249 ) $ 158,393 $ 150,754 $ 416,459 $ 436,545 (1) No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2020 or 2019.
Schedule Of Information Of Total Assets On Segment Basis	The following table presents our company’s total assets on a segment basis at September 30, 2020 and December 31, 2019 (in thousands) September 30, 2020 December 31, 2019 Global Wealth Management $ 20,784,329 $ 20,675,580 Institutional Group 3,806,220 3,668,723 Other 958,633 265,922 $ 25,549,182 $ 24,610,225
Schedule Of Net Revenues Earned On Major Geographical Areas	Revenues, classified by the major geographic areas in which they are earned for the three and nine months ended September 30, 2020 and 2019, were as follows (in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 United States $ 814,301 $ 775,356 $ 2,485,336 $ 2,271,056 United Kingdom 45,705 43,632 147,097 113,783 Other 23,294 2,584 59,718 7,940 $ 883,300 $ 821,572 $ 2,692,151 $ 2,392,779

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020 and 2019 (in thousands, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net income applicable to Stifel Financial Corp. $ 120,527 $ 109,414 $ 315,003 $ 317,706 Preferred dividends 9,897 4,844 19,584 12,476 Net income available to common shareholders $ 110,630 $ 104,570 $ 295,419 $ 305,230 Shares for basic and diluted calculation: Average shares used in basic computation 70,627 71,197 70,814 72,512 Dilutive effect of stock options and units (1) 5,223 6,947 4,898 6,314 Average shares used in diluted computation 75,850 78,144 75,712 78,826 Earnings per common share: Basic $ 1.57 $ 1.47 $ 4.17 $ 4.21 Diluted $ 1.46 $ 1.34 $ 3.90 $ 3.87 (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, Basis o_3

Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	Sep. 30, 2020	Feb. 07, 2020	Dec. 31, 2019
Stifel Credit Facility [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Credit facility	$ 300,000,000
North Shore Aviation Holdings LLC [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			27.50%
North Shore Aviation Holdings LLC [Member] | Stifel Credit Facility [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Credit facility		$ 120,000,000

New Accounting Pronouncements_2

New Accounting Pronouncements (Narrative) (Details) - ASU 2016-13 [Member] $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Increase in allowance for credit losses	$ 10.4
Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative effect decrease to retained earnings (net of tax)	$ 7.8

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	Sep. 30, 2020	Dec. 31, 2019
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables from clearing organizations	$ 208,361	$ 471,122
Deposits paid for securities borrowed	178,517	135,373
Securities failed to deliver	57,807	21,295
Receivables from brokers, dealers and clearing organizations, Total	$ 444,685	$ 627,790

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	Sep. 30, 2020	Dec. 31, 2019
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Deposits received from securities loaned	$ 87,352	$ 608,333
Securities failed to receive	52,322	25,256
Payable to clearing organizations	17,679	78,702
Payables to broker, dealers and clearing organizations, Total	$ 157,353	$ 712,291

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	Sep. 30, 2020	Dec. 31, 2019
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 117,118	$ 38,955
Unfunded commitments	2,098	2,156
Money Market Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	106,207	25,734
Mutual Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	6,152	7,875
Private Equity Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	1,538	2,288
Unfunded commitments	1,203	1,203
Partnership Interests [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,221	3,058
Unfunded commitments	$ 895	$ 953

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	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	$ 819,715	$ 972,932
Available-for-sale securities	2,824,258	3,254,737
Investments	108,412	79,972
Cash equivalents measured at NAV	106,207	25,734
Derivative contracts, Assets		1,086
Total Assets	3,858,592	4,334,461
Financial instruments sold, but not yet purchased, at fair value	599,934	662,852
Sovereign Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	3,069	12,403
Financial instruments sold, but not yet purchased, at fair value	18,393	13,271
U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	117,805	66,881
Available-for-sale securities	4,630	5,067
Financial instruments sold, but not yet purchased, at fair value	6,265	1,000
Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	44	28,385
Available-for-sale securities	1,424,840	1,592,889
Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	219,734	250,783
Available-for-sale securities	605,555	675,311
Financial instruments sold, but not yet purchased, at fair value	177,744	140,100
Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	71,387	64,009
Investments	24,925	35,083
Financial instruments sold, but not yet purchased, at fair value	42,017	32,047
State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	143,201	137,211
Available-for-sale securities	2,459	24,297
Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	5,501	9,983
Financial instruments sold, but not yet purchased, at fair value		955
Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	12,615	14,243
Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	183	654
Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	59,778	16,771
Investments in Funds and Partnerships Measured at NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10,911	13,221
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	42,444	9,266
Financial instruments sold, but not yet purchased, at fair value	220,510	243,570
Mortgage Backed Securities [Member] | Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	215,333	388,856
Available-for-sale securities	682,174	837,878
Financial instruments sold, but not yet purchased, at fair value	135,005	231,909
Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,197	5,155
Available-for-sale securities	6,779	9,758
Mortgage Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	97,821	109,537
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	110,704	71,717
Investments	33,614	43,928
Total Assets	144,318	115,645
Financial instruments sold, but not yet purchased, at fair value	264,022	276,250
Level 1 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,167	872
Financial instruments sold, but not yet purchased, at fair value	1,495	633
Level 1 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	67,093	61,579
Investments	23,865	34,023
Financial instruments sold, but not yet purchased, at fair value	42,017	32,047
Level 1 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	9,749	9,905
Level 1 [Member] | U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	42,444	9,266
Financial instruments sold, but not yet purchased, at fair value	220,510	243,570
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	703,501	891,889
Available-for-sale securities	2,824,258	3,254,737
Investments	15,028	6,483
Derivative contracts, Assets		1,086
Total Assets	3,542,787	4,154,195
Financial instruments sold, but not yet purchased, at fair value	335,912	385,647
Level 2 [Member] | Sovereign Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	3,069	12,403
Financial instruments sold, but not yet purchased, at fair value	18,393	13,271
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	117,805	66,881
Available-for-sale securities	4,630	5,067
Financial instruments sold, but not yet purchased, at fair value	6,265	1,000
Level 2 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	35	28,210
Available-for-sale securities	1,424,840	1,592,889
Level 2 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	218,567	249,911
Available-for-sale securities	605,555	675,311
Financial instruments sold, but not yet purchased, at fair value	176,249	139,467
Level 2 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	4,294	2,430
Level 2 [Member] | State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	143,201	137,211
Available-for-sale securities	2,459	24,297
Level 2 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		832
Level 2 [Member] | Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		470
Level 2 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	15,028	6,013
Level 2 [Member] | Mortgage Backed Securities [Member] | Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	215,333	388,856
Available-for-sale securities	682,174	837,878
Financial instruments sold, but not yet purchased, at fair value	135,005	231,909
Level 2 [Member] | Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,197	5,155
Available-for-sale securities	6,779	9,758
Level 2 [Member] | Mortgage Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	97,821	109,537
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	5,510	9,326
Investments	48,859	16,340
Total Assets	54,369	25,666
Financial instruments sold, but not yet purchased, at fair value		955
Level 3 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	9	175
Level 3 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,060	1,060
Level 3 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	5,501	9,151
Financial instruments sold, but not yet purchased, at fair value		955
Level 3 [Member] | Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	12,615	14,243
Level 3 [Member] | Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	183	184
Level 3 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 35,001	$ 853

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 175	$ 175
Unrealized gains/(losses)	(166)	(166)
Net change	(166)	(166)
Ending Balance	9	9
Corporate Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,060	1,060
Ending Balance	1,060	1,060
Equity Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	12,621	14,243
Unrealized gains/(losses)	(6)	(1,628)
Net change	(6)	(1,628)
Ending Balance	12,615	12,615
Auction Rate Municipal Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	183	184
Unrealized gains/(losses)		(1)
Net change		(1)
Ending Balance	183	183
Other Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	35,001	853
Unrealized gains/(losses)		(478)
Sales		(20)
Net change		34,148
Ending Balance	35,001	35,001
Transfers into Level 3		34,646
Loans [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	9,611	9,151
Unrealized gains/(losses)	690	(2,923)
Purchases	667	7,748
Sales	(4,467)	(7,472)
Redemptions	1,000	(1,003)
Redemptions	(1,000)	1,003
Net change	(4,110)	(3,650)
Ending Balance	$ 5,501	$ 5,501

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities purchased under agreements to resell	[1]	$ 436,860	$ 385,008
Financial instruments owned		819,715	972,932
Available-for-sale securities		2,824,258	3,254,737
Held-to-maturity securities		3,335,033	2,827,883
Derivative contracts			1,086
Securities sold under agreements to repurchase	[2]	182,271	391,634
Financial instruments sold, but not yet purchased, at fair value		599,934	662,852
Senior notes		1,412,005	1,017,010
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1,716,570	1,142,596
Cash segregated for regulatory purposes		154,374	131,374
Securities purchased under agreements to resell		436,860	385,008
Financial instruments owned		819,715	972,932
Available-for-sale securities		2,824,258	3,254,737
Held-to-maturity securities		3,397,713	2,856,219
Bank loans		10,650,760	9,624,042
Loans held for sale		281,475	389,693
Investments		108,412	79,972
Derivative contracts	[3]		1,086
Securities sold under agreements to repurchase		182,271	391,634
Bank deposits		16,400,001	15,332,581
Financial instruments sold, but not yet purchased, at fair value		599,934	662,852
Federal Home Loan Bank advances			250,000
Senior notes		1,412,005	1,017,010
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		1,716,570	1,142,596
Cash segregated for regulatory purposes		154,374	131,374
Securities purchased under agreements to resell		436,860	385,008
Financial instruments owned		819,715	972,932
Available-for-sale securities		2,824,258	3,254,737
Held-to-maturity securities		3,335,033	2,827,883
Bank loans		10,721,120	9,801,986
Loans held for sale		281,475	389,693
Investments		108,412	79,972
Derivative contracts	[3]		1,086
Securities sold under agreements to repurchase		182,271	391,634
Bank deposits		16,198,251	14,467,894
Financial instruments sold, but not yet purchased, at fair value		599,934	662,852
Federal Home Loan Bank advances			250,000
Senior notes		1,560,013	1,069,425
Debentures to Stifel Financial Capital Trusts		$ 39,338	$ 45,847
[1]	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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively.
[2]	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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively
[3]	Included in other assets in the consolidated statements of financial condition.

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		Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	[1]	$ 436,860	$ 385,008
Held-to-maturity securities		3,335,033	2,827,883
Securities sold under agreements to repurchase	[2]	182,271	391,634
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		1,610,363	1,116,862
Cash segregated for regulatory purposes		154,374	131,374
Securities purchased under agreements to resell		436,860	385,008
Held-to-maturity securities		3,335,033	2,827,883
Bank loans		10,721,120	9,801,986
Loans held for sale		281,475	389,693
Securities sold under agreements to repurchase		182,271	391,634
Bank deposits		16,198,251	14,467,894
Senior notes		1,560,013	1,069,425
Debentures to Stifel Financial Capital Trusts		39,338	45,847
Federal Home Loan Bank advances			250,000
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		1,610,363	1,116,862
Cash segregated for regulatory purposes		154,374	131,374
Securities purchased under agreements to resell		337,095	342,132
Securities sold under agreements to repurchase			22,205
Senior notes		1,560,013	1,069,425
Federal Home Loan Bank advances			250,000
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		99,765	42,876
Held-to-maturity securities		3,179,239	2,666,773
Bank loans		10,721,120	9,801,986
Loans held for sale		281,475	389,693
Securities sold under agreements to repurchase		182,271	369,429
Bank deposits		16,198,251	14,467,894
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		155,794	161,110
Debentures to Stifel Financial Capital Trusts		$ 39,338	$ 45,847
[1]	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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively.
[2]	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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively

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	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	$ 819,715	$ 972,932
U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	117,805	66,881
Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	219,734	250,783
Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	71,387	64,009
State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	143,201	137,211
Loans [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	5,501	9,983
U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	42,444	9,266
Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	3,069	12,403
Securities Sold, But Not yet Purchased [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	599,934	662,852
Securities Sold, But Not yet Purchased [Member] | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	6,265	1,000
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	177,744	140,100
Securities Sold, But Not yet Purchased [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	42,017	32,047
Securities Sold, But Not yet Purchased [Member] | Loans [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities		955
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	220,510	243,570
Securities Sold, But Not yet Purchased [Member] | Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	135,005	231,909
Securities Sold, But Not yet Purchased [Member] | Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Sovereign debt	18,393	13,271
Securities Owned [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Asset-backed securities	44	28,385
Financial instruments owned, at fair value	819,715	972,932
Securities Owned [Member] | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	117,805	66,881
Securities Owned [Member] | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities	219,734	250,783
Securities Owned [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	71,387	64,009
Securities Owned [Member] | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities	143,201	137,211
Securities Owned [Member] | Loans [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities	5,501	9,983
Securities Owned [Member] | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	42,444	9,266
Securities Owned [Member] | Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	215,333	388,856
Securities Owned [Member] | Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	1,197	5,155
Securities Owned [Member] | Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Sovereign debt	$ 3,069	$ 12,403

Financial Instruments Owned A_4

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 188.4	$ 801.5
Securities Owned [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 167	$ 511.2

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		Sep. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		$ 2,792,697	$ 3,254,041
Available for sale securities, unrealized gains	[1]	49,517	15,489
Available-for-sale Securities, Gross unrealized losses	[1]	(17,956)	(14,793)
Available-for-sale securities		2,824,258	3,254,737
Held-to-maturity Securities, Amortized cost		3,397,713	2,856,219
Held-to-maturity securities, Estimated fair value		3,335,033	2,827,883
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		4,540	5,028
Available for sale securities, unrealized gains	[1]	90	39
Available-for-sale securities		4,630	5,067
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		2,401	24,198
Available for sale securities, unrealized gains	[1]	58	99
Available-for-sale securities		2,459	24,297
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		664,899	840,659
Available for sale securities, unrealized gains	[1]	17,491	3,070
Available-for-sale Securities, Gross unrealized losses	[1]	(216)	(5,851)
Available-for-sale securities		682,174	837,878
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		93,864	109,982
Available for sale securities, unrealized gains	[1]	3,957	269
Available-for-sale Securities, Gross unrealized losses	[1]		(714)
Available-for-sale securities		97,821	109,537
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		6,793	9,731
Available for sale securities, unrealized gains	[1]	70	50
Available-for-sale Securities, Gross unrealized losses	[1]	(84)	(23)
Available-for-sale securities		6,779	9,758
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		581,249	664,028
Available for sale securities, unrealized gains	[1]	24,349	11,283
Available-for-sale Securities, Gross unrealized losses	[1]	(43)
Available-for-sale securities		605,555	675,311
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		1,438,951	1,600,415
Available for sale securities, unrealized gains	[1]	3,502	679
Available-for-sale Securities, Gross unrealized losses	[1]	(17,613)	(8,205)
Available-for-sale securities		1,424,840	1,592,889
Held-to-maturity Securities, Amortized cost	[2]	3,397,713	2,856,219
Held-to-maturity Securities, Gross unrealized gains	[2]	3,415	5,960
Held-to-maturity Securities, Gross unrealized losses	[2]	(66,095)	(34,296)
Held-to-maturity securities, Estimated fair value	[2]	$ 3,335,033	$ 2,827,883
[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) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Aug. 01, 2019USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 18,600		$ 18,600
Proceeds from sale of available-for-sale securities	0	$ 486,500	491,900	$ 641,800
Net realized gains (loss) resulting from sale of available-for-sale securities			(500)	(300)
Transfers from available for sale securities to held to maturity					$ 313,000
Transfers from held to maturity to available for sale securities reclassification fair value							$ 1,100,000
Transfer from held-to-maturity securities to available-for-sale, net of tax		17,900		17,900
Unrealized gains (losses) recorded in accumulated other comprehensive loss	19,100	$ (1,600)	22,500	$ 40,500
Financial instruments pledged as collateral	$ 188,400		$ 188,400			$ 801,500
Number of available for sale securities whose amortized costs exceeded their fair values | security	91		91
Available-for-sale Securities, Continuous	$ 17,956		$ 17,956
Available-for-sale Securities, Continuous Unrealized	9,779		9,779
Available-for-sale Securities, Continuous	$ 1,322,175		$ 1,322,175
Percentage of available-for-sale portfolio	46.80%		46.80%
Pledged [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Trading securities pledged	$ 1,500,000		$ 1,500,000			$ 816,100
Other Assets [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 25,100		$ 25,100

Available-For-Sale And Held-T_5

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of Available-For-Sale Securities And Held-To-Maturity Securities By Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2020		Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Available-for-sale Securities, debt maturities, within one year, Amortized Cost	$ 152,731		$ 6,861
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost	85,773		229,184
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost	302,285		422,236
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost	528,866		409,664
Available-for-sale Securities, debt maturities, after ten years, Amortized Cost	1,723,042		2,186,096
Available-for-sale Securities, debt maturities, Amortized Cost	2,792,697		3,254,041
Available-for-sale Securities, debt maturities, within one year, Fair Value	154,255	[1]	6,871
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value	88,263		229,760
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value	320,037		429,909
Available-for-sale Securities, debt maturities, after five through ten years, fair value	527,815	[1]	411,680
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	1,733,888	[1]	2,176,517
Available-for-sale Securities, debt maturities, Fair Value	2,824,258	[1]	3,254,737
Held-to-maturity Securities, debt maturities, after three through five years, Amortized Cost	6,537
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost	1,302,344		598,250
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost	2,088,832		2,257,969
Held-to-maturity Securities, Amortized cost	3,397,713		2,856,219
Held-to-maturity Securities, debt maturities, after three through five years, Fair Value	6,533
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value	1,281,809		597,166
Held-to-maturity Securities, debt maturities, after ten years, Fair Value	2,046,691		2,230,717
Held-to-maturity Securities, debt maturities, Fair Value	$ 3,335,033		$ 2,827,883
[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		Sep. 30, 2020		Dec. 31, 2019
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value		$ 154,255	[1]	$ 6,871
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	408,300
Available-for-sale Securities, debt maturities, after five through ten years, fair value		527,815	[1]	411,680
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		1,733,888	[1]	2,176,517
Available-for-sale Securities, debt maturities, Fair Value		2,824,258	[1]	3,254,737
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		1,302,344		598,250
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,088,832		2,257,969
Held-to-maturity Securities, Amortized cost		3,397,713		$ 2,856,219
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]	2,318
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	2,312
Available-for-sale Securities, debt maturities, Fair Value	[1]	4,630
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]	2,459
Available-for-sale Securities, debt maturities, Fair Value	[1]	2,459
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]	127,204
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	405,522
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	55,732
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	17,097
Available-for-sale Securities, debt maturities, Fair Value	[1]	605,555
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]	445,607
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	979,233
Available-for-sale Securities, debt maturities, Fair Value	[1]	1,424,840
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		6,537
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		1,302,344
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,088,832
Held-to-maturity Securities, Amortized cost		3,397,713
Mortgage Backed Securities [Member] | 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]	11
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	444
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	24,017
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	657,702
Available-for-sale Securities, debt maturities, Fair Value	[1]	682,174
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]	18,656
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1],[2]	22
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1],[2]	79,143
Available-for-sale Securities, debt maturities, Fair Value	[1],[2]	97,821
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]	6,066
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	713
Available-for-sale Securities, debt maturities, Fair Value	[1]	$ 6,779
[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	Sep. 30, 2020USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	$ (8,177)
Available-for-sale Securities, Estimated fair value, Less than 12 months	689,132
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(9,779)
Available-for-sale Securities, Estimated fair value, 12 months or more	633,043
Available-for-sale Securities, Gross unrealized losses, Total	(17,956)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	1,322,175
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(118)
Available-for-sale Securities, Estimated fair value, Less than 12 months	6,797
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(98)
Available-for-sale Securities, Estimated fair value, 12 months or more	10,191
Available-for-sale Securities, Gross unrealized losses, Total	(216)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	16,988
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(84)
Available-for-sale Securities, Estimated fair value, 12 months or more	713
Available-for-sale Securities, Gross unrealized losses, Total	(84)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	713
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	(43)
Available-for-sale Securities, Estimated fair value, Less than 12 months	13,956
Available-for-sale Securities, Gross unrealized losses, Total	(43)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	13,956
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	(8,016)
Available-for-sale Securities, Estimated fair value, Less than 12 months	668,379
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(9,597)
Available-for-sale Securities, Estimated fair value, 12 months or more	622,139
Available-for-sale Securities, Gross unrealized losses, Total	(17,613)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 1,290,518

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		Sep. 30, 2020	Dec. 31, 2019
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		$ 3,397,713	$ 2,856,219
Asset-Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost	[1]	3,397,713	$ 2,856,219
Asset-Backed Securities [Member] | AAA [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		423,043
Asset-Backed Securities [Member] | AA [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		2,956,572
Asset-Backed Securities [Member] | A [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		15,500
Asset-Backed Securities [Member] | C [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity securities, at amortized cost		$ 2,598
[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	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 10,753,688		$ 9,752,616
Unamortized loan discount, net	(2,260)		(6,588)
Loans in process	13,398		(27,717)
Unamortized loan fees, net	47		1,310
Allowance for loan losses	(114,113)	$ (115,821)	(95,579)	$ (91,360)	$ (90,472)	$ (85,833)
Loans held for investment, net	$ 10,650,760		$ 9,624,042
Gross bank loans, Percent	100.00%		100.00%
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 4,080,939		$ 3,438,953
Allowance for loan losses	$ (75,809)	(65,503)	$ (69,949)	(68,172)	(69,263)	(68,367)
Gross bank loans, Percent	37.90%		35.30%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 3,804,836		$ 3,309,548
Allowance for loan losses	$ (17,683)	(24,043)	$ (14,253)	(12,562)	(12,042)	(11,228)
Gross bank loans, Percent	35.40%		33.90%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 386,957		$ 428,549
Allowance for loan losses	$ (7,917)	(10,647)	$ (3,564)	(2,903)	(2,478)	(1,778)
Gross bank loans, Percent	3.60%		4.40%
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 532,319		$ 398,839
Allowance for loan losses	$ (10,186)	(13,075)	$ (4,613)	(3,267)	(2,402)	(1,241)
Gross bank loans, Percent	5.00%		4.10%
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 67,386		$ 51,205
Allowance for loan losses	$ (381)	(499)	$ (442)	(435)	(421)	(310)
Gross bank loans, Percent	0.60%		0.50%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 39,735		$ 27,311
Allowance for loan losses	$ (235)	(247)	$ (194)	(195)	(179)	(88)
Gross bank loans, Percent	0.40%		0.30%
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 1,841,516		$ 2,098,211
Allowance for loan losses	$ (1,902)	$ (1,807)	$ (2,361)	$ (2,181)	$ (2,311)	$ (1,978)
Gross bank loans, Percent	17.10%		21.50%

Bank Loans (Narrative) (Details

Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 281,475		$ 281,475		$ 389,693
Gains (losses) recognized from sale of loans	15,000	$ 4,500	28,000	$ 7,700
Accrued interest receivable	18,600		18,600
Provision for credit losses	(1,777)	$ 929	30,369	$ 5,565
Impaired loans more than 90 days past due	14,500		14,500		14,600
Troubled debt restructurings	200		200		200
Specific allowance	$ 8,182		$ 8,182		$ 8,182
Collateralized loan portfolio	98.60%		98.60%		98.30%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 281,500		$ 281,500		$ 389,700
Unfunded Commitment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for credit losses	3,000		100
Stifel Bancorp [Member] | Executive Officers and Directors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	21,800		21,800		24,500
Stifel Bancorp [Member] | Executive Officers and Directors of Certain Affiliated Entities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 21,800		$ 21,800		$ 24,500

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 115,821	$ 90,472	$ 95,579	$ 85,833
CECL Adoption			(11,736)
Provision	(1,777)	929	30,369	5,565
Charge-offs	(23)	(56)	(193)	(166)
Recoveries	92	15	94	128
Ending Balance	114,113	91,360	114,113	91,360
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	65,503	69,263	69,949	68,367
CECL Adoption			(19,940)
Provision	10,303	(1,070)	25,949	(116)
Charge-offs	(1)	(21)	(153)	(79)
Recoveries	4		4
Ending Balance	75,809	68,172	75,809	68,172
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	24,043	12,042	14,253	11,228
CECL Adoption			3,499
Provision	(6,360)	519	(69)	1,246
Recoveries		1		88
Ending Balance	17,683	12,562	17,683	12,562
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,807	2,311	2,361	1,978
CECL Adoption			1,346
Provision	95	(130)	(1,805)	203
Ending Balance	1,902	2,181	1,902	2,181
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	10,647	2,478	3,564	1,778
CECL Adoption			791
Provision	(2,730)	425	3,562	1,125
Ending Balance	7,917	2,903	7,917	2,903
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	13,075	2,402	4,613	1,241
CECL Adoption			2,674
Provision	(2,889)	865	2,899	2,026
Ending Balance	10,186	3,267	10,186	3,267
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	499	421	442	310
CECL Adoption			39
Provision	(205)	13	(188)	123
Recoveries	87	1	88	2
Ending Balance	381	435	381	435
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	247	179	194	88
CECL Adoption			58
Provision	9	38	21	156
Charge-offs	(22)	(35)	(40)	(87)
Recoveries	1	13	2	38
Ending Balance	$ 235	195	235	195
Unallocated [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance		1,376	203	843
CECL Adoption			$ (203)
Provision		269		802
Ending Balance		$ 1,645		$ 1,645

Bank Loans (Recorded Balances O

Bank Loans (Recorded Balances Of Loans and Amount Of Allowance Allocated Based Upon Impairment Method by Portfolio Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 8,182		$ 8,182
Allowance for Loan Losses, Collectively Evaluated for Impairment	105,931		87,397
Allowance for Loan Losses, Total	114,113	$ 115,821	95,579	$ 91,360	$ 90,472	$ 85,833
Recorded Investment in Loans, Individually Evaluated for Impairment	14,493		14,587
Recorded Investment in Loans, Collectively Evaluated for Impairment	10,739,195		9,738,029
Recorded Investment in Loans, Total	10,753,688		9,752,616
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	8,158		8,158
Allowance for Loan Losses, Collectively Evaluated for Impairment	67,651		61,791
Allowance for Loan Losses, Total	75,809	65,503	69,949	68,172	69,263	68,367
Recorded Investment in Loans, Individually Evaluated for Impairment	13,084		12,991
Recorded Investment in Loans, Collectively Evaluated for Impairment	4,067,855		3,425,962
Recorded Investment in Loans, Total	4,080,939		3,438,953
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	24		24
Allowance for Loan Losses, Collectively Evaluated for Impairment	17,659		14,229
Allowance for Loan Losses, Total	17,683	24,043	14,253	12,562	12,042	11,228
Recorded Investment in Loans, Individually Evaluated for Impairment	1,409		1,412
Recorded Investment in Loans, Collectively Evaluated for Impairment	3,803,427		3,308,136
Recorded Investment in Loans, Total	3,804,836		3,309,548
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,902		2,361
Allowance for Loan Losses, Total	1,902	1,807	2,361	2,181	2,311	1,978
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,841,516		2,098,211
Recorded Investment in Loans, Total	1,841,516		2,098,211
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,917		3,564
Allowance for Loan Losses, Total	7,917	10,647	3,564	2,903	2,478	1,778
Recorded Investment in Loans, Collectively Evaluated for Impairment	386,957		428,549
Recorded Investment in Loans, Total	386,957		428,549
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	10,186		4,613
Allowance for Loan Losses, Total	10,186	13,075	4,613	3,267	2,402	1,241
Recorded Investment in Loans, Collectively Evaluated for Impairment	532,319		398,839
Recorded Investment in Loans, Total	532,319		398,839
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	381		442
Allowance for Loan Losses, Total	381	499	442	435	421	310
Recorded Investment in Loans, Individually Evaluated for Impairment			184
Recorded Investment in Loans, Collectively Evaluated for Impairment	67,386		51,021
Recorded Investment in Loans, Total	67,386		51,205
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	235		194
Allowance for Loan Losses, Total	235	$ 247	194	195	179	88
Recorded Investment in Loans, Collectively Evaluated for Impairment	39,735		27,311
Recorded Investment in Loans, Total	$ 39,735		27,311
Unallocated [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment			203
Allowance for Loan Losses, Total			$ 203	$ 1,645	$ 1,376	$ 843

Bank Loans (Loans That Were Ind

Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 14,643	$ 14,737
Recorded Investment with No Allowance	1,249	1,647
Recorded Investment with Allowance	13,244	12,940
Total Recorded Investment	14,493	14,587
Related Allowance	8,182	8,182
Average Recorded Investment	14,645	15,587
Commercial And Industrial [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	13,084	12,991
Recorded Investment with No Allowance		51
Recorded Investment with Allowance	13,084	12,940
Total Recorded Investment	13,084	12,991
Related Allowance	8,158	8,158
Average Recorded Investment	13,085	14,172
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	1,409	1,412
Recorded Investment with No Allowance	1,249	1,412
Recorded Investment with Allowance	160
Total Recorded Investment	1,409	1,412
Related Allowance	24	24
Average Recorded Investment	1,499	1,231
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance		184
Recorded Investment with No Allowance		184
Total Recorded Investment		184
Average Recorded Investment	61	184
Other [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 150	$ 150

Bank Loans (Aging Of The Record

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($)		Sep. 30, 2020		Dec. 31, 2019
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 18,422,000		$ 24,937,000
Current Balance		10,735,266,000		9,727,679,000
Recorded Investment in Loans, Total		10,753,688,000		9,752,616,000
Non-Accrual		13,084,000	[1]	14,373,000	[2]
Restructured		160,000	[1]	163,000	[2]
Nonperforming loans with no allowance	[1]	1,249,000
Total	[1]	14,493,000
Loans past due 90 days and still accruing interest		0		0
Total	[2]			14,536,000
30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,145,000		10,564,000
90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		14,277,000		14,373,000
Commercial And Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		13,084,000		12,940,000
Current Balance		4,067,855,000		3,426,013,000
Recorded Investment in Loans, Total		4,080,939,000		3,438,953,000
Non-Accrual		13,084,000	[1]	12,940,000	[2]
Total	[1]	13,084,000
Total	[2]			12,940,000
Commercial And Industrial [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		144,000
Commercial And Industrial [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		12,940,000		12,940,000
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,627,000		11,725,000
Current Balance		3,800,209,000		3,297,823,000
Recorded Investment in Loans, Total		3,804,836,000		3,309,548,000
Non-Accrual	[2]			1,249,000
Restructured		160,000	[1]	163,000	[2]
Nonperforming loans with no allowance	[1]	1,249,000
Total	[1]	1,409,000
Total	[2]			1,412,000
Residential Real Estate [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		3,290,000		10,476,000
Residential Real Estate [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,337,000		1,249,000
Securities-Based Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		1,841,516,000		2,098,211,000
Recorded Investment in Loans, Total		1,841,516,000		2,098,211,000
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		386,957,000		428,549,000
Recorded Investment in Loans, Total		386,957,000		428,549,000
Construction And Land [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		532,319,000		398,839,000
Recorded Investment in Loans, Total		532,319,000		398,839,000
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		686,000		267,000
Current Balance		66,700,000		50,938,000
Recorded Investment in Loans, Total		67,386,000		51,205,000
Non-Accrual	[2]			184,000
Total	[2]			184,000
Home Equity Lines Of Credit [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		686,000		83,000
Home Equity Lines Of Credit [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				184,000
Other [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		25,000		5,000
Current Balance		39,710,000		27,306,000
Recorded Investment in Loans, Total		39,735,000		27,311,000
Other [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 25,000		$ 5,000
[1]	There were no loans past due 90 days and still accruing interest at September 30, 2020.
[2]	There were no loans past due 90 days and still accruing interest at December 31, 2019.

Bank Loans (Risk Category Of Lo

Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 10,753,688	$ 9,752,616
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	10,426,029	9,676,864
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	137,182	49,244
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	176,288	13,568
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	14,189	12,940
Commercial And Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	4,080,939	3,438,953
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,791,192	3,365,800
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	120,663	48,241
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	156,144	11,972
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	12,940	12,940
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,804,836	3,309,548
Residential Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,802,942	3,307,719
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	645	417
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio		1,412
Residential Real Estate [Member] | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,249
Securities-Based Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,841,516	2,098,211
Securities-Based Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,841,516	2,098,211
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	386,957	428,549
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	385,645	427,963
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,168	586
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	144
Construction And Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	532,319	398,839
Construction And Land [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	498,079	398,839
Construction And Land [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	14,240
Construction And Land [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	20,000
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	67,386	51,205
Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	66,920	51,021
Home Equity Lines Of Credit [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	466
Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio		184
Other [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	39,735	27,311
Other [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 39,735	$ 27,311

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	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	$ 10,753,688	$ 9,752,616
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	4,080,939	3,438,953
Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	466,481
Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	105,957
Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	2,608,716
Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	32,315
Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	11,154
Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	47,790
Commercial And Industrial [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	808,526
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	3,804,836	3,309,548
Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,217,617
Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	964,320
Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	412,590
Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	327,187
Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	303,909
Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	579,213
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,841,516	2,098,211
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	21,968
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	108,647
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	25,825
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	195
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	300
Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	56,691
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	1,627,890
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	386,957	428,549
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	74,689
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	158,422
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	42,576
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	52,387
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	14,638
Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	43,469
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	776
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	532,319	398,839
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	44,892
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	254,524
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	145,387
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	68,495
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	6,852
Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,370
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	10,799
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	67,386	51,205
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	67,386
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	39,735	27,311
Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	6
Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	755
Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	20,049
Other [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	18,925
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	10,426,029	9,676,864
Pass [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	3,791,192	3,365,800
Pass [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	466,481
Pass [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	105,957
Pass [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	2,355,918
Pass [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	19,375
Pass [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	11,154
Pass [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	47,763
Pass [Member] | Commercial And Industrial [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	784,544
Pass [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	3,802,942	3,307,719
Pass [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,217,617
Pass [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	964,320
Pass [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	412,590
Pass [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	326,393
Pass [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	303,909
Pass [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	578,113
Pass [Member] | Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,841,516	2,098,211
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	21,968
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	108,647
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	25,825
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	195
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	300
Pass [Member] | Securities-Based Loans [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	56,691
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	1,627,890
Pass [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	385,645	427,963
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	74,689
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	158,422
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	42,432
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	52,387
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	13,470
Pass [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	43,469
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	776
Pass [Member] | Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	498,079	398,839
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	44,892
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	254,524
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	111,147
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	68,495
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	6,852
Pass [Member] | Construction And Land [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,370
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	10,799
Pass [Member] | Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	66,920	51,021
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	66,920
Pass [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	39,735	27,311
Pass [Member] | Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	6
Pass [Member] | Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	755
Pass [Member] | Other [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	20,049
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	18,925
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	137,182	49,244
Special Mention [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	120,663	48,241
Special Mention [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	106,214
Special Mention [Member] | Commercial And Industrial [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	14,449
Special Mention [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	645	417
Special Mention [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	645
Special Mention [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,168	586
Special Mention [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,168
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
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] | Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	466
Special Mention [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	466
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	176,288	13,568
Substandard [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	156,144	11,972
Substandard [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	146,584
Substandard [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	27
Substandard [Member] | Commercial And Industrial [Member] | Revolving Loans Amortized Cost Basis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	9,533
Substandard [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year		1,412
Substandard [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	144
Substandard [Member] | Commercial Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	144
Substandard [Member] | Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	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] | Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year		184
Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	14,189	12,940
Doubtful [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	12,940	$ 12,940
Doubtful [Member] | Commercial And Industrial [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	12,940
Doubtful [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	1,249
Doubtful [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	149
Doubtful [Member] | Residential Real Estate [Member] | Prior [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term loans amortized cost basis by origination year	$ 1,100

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			$ 1,194,074
Goodwill, Adjustments			(2,104)
Goodwill, Sale of ZCM			(9,972)
Goodwill, Ending balance	$ 1,181,998		1,181,998
Intangible assets, Beginning balance			161,773
Intangible assets, Adjustments / Sale of ZCM			(1,812)
Intangible assets, Amortization	(4,700)	$ (3,800)	(14,489)	$ (10,960)
Intangible assets, Ending balance	145,472		145,472
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			344,981
Goodwill, Sale of ZCM			(9,972)
Goodwill, Ending balance	335,009		335,009
Intangible assets, Beginning balance			53,279
Intangible assets, Adjustments / Sale of ZCM			(1,532)
Intangible assets, Amortization			(5,006)
Intangible assets, Ending balance	46,741		46,741
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			849,093
Goodwill, Adjustments			(2,104)
Goodwill, Ending balance	846,989		846,989
Intangible assets, Beginning balance			108,494
Intangible assets, Adjustments / Sale of ZCM			(280)
Intangible assets, Amortization			(9,483)
Intangible assets, Ending balance	$ 98,731		$ 98,731

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	Dec. 06, 2019	Nov. 01, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Goodwill and Intangible Assets [Line Items]
Amortization of intangible assets			$ 4,700	$ 3,800	$ 14,489	$ 10,960
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets					9 years 10 months 24 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					6 years 1 month 6 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 9 months 18 days
MainFirst Bank AG [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Date of acquisition		Jul. 1, 2019
GMP Capital Inc. [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Date of acquisition	Sep. 3, 2019

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 254,587	$ 259,102
Accumulated Amortization	109,115	97,329
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	203,188	207,253
Accumulated Amortization	82,990	75,987
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	28,659	28,659
Accumulated Amortization	15,196	13,649
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,615	8,615
Accumulated Amortization	4,387	2,985
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,240	9,490
Accumulated Amortization	3,825	2,828
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	840	4,245
Accumulated Amortization	303	1,787
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,045	840
Accumulated Amortization	$ 2,414	$ 93

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Amortization Expense In Future Periods) (Details) $ in Thousands	Sep. 30, 2020USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2020	$ 4,630
2021	17,769
2022	16,444
2023	14,619
2024	13,958
Thereafter	75,934
Future amortization expense total	$ 143,354

Borrowings and Federal Home L_2

Borrowings and Federal Home Loan Bank Advances (Narrative) (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2020USD ($)item	Sep. 30, 2020USD ($)item
Short-term Debt [Line Items]
Uncommitted secured lines of credit		$ 915,000,000
Number of banks | item	5	5
Daily borrowings under our uncommitted secured lines	$ 490,000,000	$ 490,000,000
Compensating balances	0	0
Federal Home Loan Bank Advances Floating Rate	0	0
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	200,000,000	$ 200,000,000
Credit facility expiration date		2024-03
LIBOR rate		1.75%
Outstanding credit facility	0	$ 0
Stifel Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	300,000,000	$ 300,000,000
Credit facility expiration date		2021-06
Outstanding credit facility	$ 0	$ 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	1.31%	1.43%

Senior Notes (Summary of Senior

Senior Notes (Summary of Senior Notes) (Details) - USD ($) $ in Thousands		Sep. 30, 2020	May 31, 2020	Dec. 31, 2019	Oct. 31, 2017	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, gross		$ 1,425,000		$ 1,025,000
Debt issuance costs, net		(12,995)		(7,990)
Senior notes, net		1,412,005		1,017,010
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 3.50% due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[2]	300,000		300,000
Senior notes, net						$ 300,000
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
Senior notes 4.00% due 2030 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[4]	$ 400,000
Senior notes, net			$ 400,000
[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 December 2015, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 3.50% senior notes due December 2020
[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
[4]	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

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	Sep. 30, 2020	May 31, 2020	Dec. 31, 2019	Oct. 31, 2017	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt				$ 1,412,005		$ 1,017,010
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 3.50% due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate				3.50%
Long-term Debt								$ 300,000
Debt instrument, maturity date				Dec. 31, 2020
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 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 [Member]
Debt Instrument [Line Items]
Redemption price, percentage of principal amount	100.00%

Senior Notes (Schedule Of Corpo

Senior Notes (Schedule Of Corporate Debt Principal Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Senior notes, net	$ 1,412,005	$ 1,017,010
Non Recourse Debt [Member]
Debt Instrument [Line Items]
2020	300,000
2024	500,000
Thereafter	625,000
Senior notes, net	$ 1,425,000

Bank Deposits (Schedule of Depo

Bank Deposits (Schedule of Deposits) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Money market and savings accounts	$ 15,653,048	$ 13,530,670
Demand deposits (interest-bearing)	363,999	1,113,296
Demand deposits (non-interest-bearing)	271,056	165,657
Certificates of deposit	111,898	522,958
Bank deposits	$ 16,400,001	$ 15,332,581

Bank Deposits (Narrative) (Deta

Bank Deposits (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Bank Deposits [Line Items]
Weighted average interest rate on deposits	0.11%	0.64%
Brokerage Customers Deposits [Member]
Bank Deposits [Line Items]
Deposits of related parties	$ 15,400	$ 13,900
Stifel Nicolaus [Member]
Bank Deposits [Line Items]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 8.8	$ 6.7

Bank Deposits (Scheduled Maturi

Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 3,120	$ 5,305
One to three years	244	360
Three to five years	13	13
Certificates of deposit, less than $100,000	3,377	5,678
Within one year	74,158	441,341
One to three years	34,163	68,855
Three to five years	200	7,084
Certificates of deposit, $100,000 and greater	108,521	517,280
Total certificates of deposit	$ 111,898	$ 522,958

Disclosures About Offsetting _3

Disclosures About Offsetting Assets And Liabilities (Financial Assets And Derivative Assets That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Offsetting [Abstract]
Gross amounts of recognized assets, Securities borrowing	[1]	$ 178,517	$ 135,373
Net amounts presented in the Statement of Financial Condition, Securities borrowing	[1]	178,517	135,373
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities borrowing	[1]	(31,528)	(52,319)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities borrowing	[1]	(127,965)	(74,760)
Securities borrowed, Net amount	[1]	19,024	8,294
Gross amounts of recognized assets, Reverse repurchase agreements	[2]	436,860	385,008
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	436,860	385,008
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	(48,594)	(59,892)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities purchased under agreements to resell	[2]	(384,970)	(325,096)
Securities purchased under agreements to resell, Net amount	[2]	3,296	20
Gross amounts of recognized assets, Cash flow interest rate contracts			1,086
Net amounts presented in the Statement of Financial Condition, Cash flow interest rate contracts			1,086
Cash flow interest rate contracts, Net amount			1,086
Gross amounts of recognized assets		615,377	521,467
Net amounts presented in the Statements of Financial Condition		615,377	521,467
Gross amounts not offset in the Statement of Financial Position		(80,122)	(112,211)
Gross amounts not offset in the Statement of Financial Position, Collateral received		(512,935)	(399,856)
Net amount		$ 22,320	$ 9,400
[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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively.

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		Sep. 30, 2020	Dec. 31, 2019
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral	[1]	$ 384,970	$ 325,096
Fair Value Of Securities Pledged As Collateral [Member]
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral		$ 433,600	$ 385,300
[1]	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 $433.6 million and $385.3 million at September 30, 2020 and December 31, 2019, respectively.

Disclosures About Offsetting _5

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities And Derivative Liabilities That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Offsetting [Abstract]
Gross amounts of recognized liabilities, Securities lending	[1]	$ (87,352)	$ (608,333)
Net amounts presented in the Statement of Financial Condition, Securities lending	[1]	(87,352)	(608,333)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending	[1]	31,528	52,319
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending	[1]	55,802	555,782
Securities lending, Net amount	[1]	(22)	(232)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell	[2]	(182,271)	(391,634)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	(182,271)	(391,634)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	48,594	59,892
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell	[2]	133,677	331,742
Gross amounts of recognized liabilities		(269,623)	(999,967)
Net amounts presented in the Statement of Financial Condition		(269,623)	(999,967)
Gross amounts not offset in the Statement of Financial Position, Financial instruments		80,122	112,211
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged		189,479	887,524
Net amount		$ (22)	$ (232)
[1]	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.
[2]	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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively

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		Sep. 30, 2020	Dec. 31, 2019
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party	[1]	$ 133,677	$ 331,742
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		$ 188,500	$ 407,300
[1]	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 $188.5 million and $407.3 million at September 30, 2020 and December 31, 2019, respectively

Commitments, Guarantees, and _2

Commitments, Guarantees, and Contingencies (Narrative) (Details) - To Be Announced Security Contracts $ in Millions	Sep. 30, 2020USD ($)
Loss Contingencies [Line Items]
Fair value of the TBA securities	$ 119.5
Purchase Commitments
Loss Contingencies [Line Items]
Estimated fair value of the purchase commitments	$ 119.5

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Narrative) (Details) $ in Millions	Sep. 30, 2020USD ($)
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	37.80%
Net capital	$ 468.5
Excess of minimum required net capital	443.7
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	Sep. 30, 2020USD ($)
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 2,732,654
Tier 1 capital, Actual Ratio	0.192
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 853,616
Tier 1 capital For Capital Adequacy Purposes, Ratio	6
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,138,154
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8
Total capital, Actual Amount	$ 2,888,681
Total capital, Actual Ratio	0.203
Total capital For Capital Adequacy Purposes, Amount	$ 1,138,154
Total capital For Capital Adequacy Purposes, Ratio	8
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,422,693
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10
Tier 1 leverage, Actual Amount	$ 2,732,654
Tier 1 leverage, Actual Ratio	0.113
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 971,609
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,214,512
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	$ 2,197,654
Tier 1 capital, Actual Ratio	0.154
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 640,212
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 924,750
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	$ 1,034,480
Tier 1 capital, Actual Ratio	0.117
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 529,707
Tier 1 capital For Capital Adequacy Purposes, Ratio	6
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 706,276
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8
Total capital, Actual Amount	$ 1,144,843
Total capital, Actual Ratio	0.130
Total capital For Capital Adequacy Purposes, Amount	$ 706,276
Total capital For Capital Adequacy Purposes, Ratio	8
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 882,845
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10
Tier 1 leverage, Actual Amount	$ 1,034,480
Tier 1 leverage, Actual Ratio	0.072
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 578,347
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 722,934
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	$ 1,034,480
Tier 1 capital, Actual Ratio	0.117
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 397,280
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 573,849
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	$ 201,106
Tier 1 capital, Actual Ratio	0.180
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 67,021
Tier 1 capital For Capital Adequacy Purposes, Ratio	6
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 89,361
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8
Total capital, Actual Amount	$ 215,097
Total capital, Actual Ratio	0.193
Total capital For Capital Adequacy Purposes, Amount	$ 89,361
Total capital For Capital Adequacy Purposes, Ratio	8
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 111,701
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10
Tier 1 leverage, Actual Amount	$ 201,106
Tier 1 leverage, Actual Ratio	0.073
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 110,807
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 138,508
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	$ 201,106
Tier 1 capital, Actual Ratio	0.180
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 50,266
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 72,606
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.5

Operating Leases (Narrative) (D

Operating Leases (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)
Lessee Lease Description [Line Items]
Operating lease right-of-use assets	$ 771,200
Operating lease liabilities	$ 811,026
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	16 years

Operating Leases - Schedule of

Operating Leases - Schedule of Net Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lessee Disclosure [Abstract]
Operating lease cost	$ 25,251	$ 22,921	$ 73,172	$ 68,081
Short-term lease cost	590	403	2,892	1,152
Variable lease cost	20	54	62	88
Sublease income	(997)	(1,244)	(2,901)	(3,729)
Net lease cost	24,864	$ 22,134	$ 73,225	$ 65,592
Operating lease cash flows	$ 63,724
Weighted-average remaining lease term	12 years 1 month 6 days		12 years 1 month 6 days
Weighted-average discount rate	4.32%		4.32%

Operating Leases - Schedule o_2

Operating Leases - Schedule of Information About Operating Lease Liabilities (Details) $ in Thousands	Sep. 30, 2020USD ($)
Lessee Disclosure [Abstract]
Remainder of 2020	$ 21,202
2021	92,043
2022	94,084
2023	93,289
2024	92,127
Thereafter	686,863
Total undiscounted lease payments	1,079,608
Imputed interest	(268,582)
Total operating lease liabilities	$ 811,026

Revenues from Contracts with _3

Revenues from Contracts with Customers (Schedule of Total Revenues Broken Out by Revenues from Contracts with Customers and Other Sources of Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenue from contracts with customers	$ 636,899	$ 585,587	$ 1,875,321	$ 1,661,442
Other	15,329	5,249	32,408	12,779
Total revenue from contracts with customers	636,899	585,587	1,875,321	1,661,442
Other sources of revenue:
Interest	114,411	178,784	403,956	557,795
Principal transactions	140,883	97,847	445,566	298,343
Other	4,929	3,498	18,571	21,682
Total revenues	897,122	865,716	2,743,414	2,539,262
Commissions [Member]
Revenues:
Revenue from contracts with customers	172,654	163,920	560,780	484,350
Investment Banking [Member]
Revenues:
Revenue from contracts with customers	218,134	198,790	614,637	540,247
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers	$ 230,782	$ 217,628	$ 667,496	$ 624,066

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			9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Commissions		$ 172,654	[1]	$ 163,920	$ 560,780	$ 484,350
Investment banking		218,134		198,790	614,637	540,247
Revenue from contracts with customers		636,899		585,587	1,875,321	1,661,442
Other		15,329		5,249	32,408	12,779
Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	137,292		93,942	359,885	247,599
Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	80,842		104,848	254,752	292,648
Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		230,782		217,628	667,496	624,066
Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Commissions		120,600	[1]	118,061	373,653	348,272
Investment banking		8,113		9,855	26,462	28,637
Revenue from contracts with customers		374,013		350,147	1,097,665	1,011,553
Other		14,535		4,615	30,104	10,619
Global Wealth Management [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	8,113		9,855	26,443	28,637
Global Wealth Management [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]				19
Global Wealth Management [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		230,765		217,616	667,446	624,025
Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Commissions		52,054	[1]	45,859	187,127	136,078
Investment banking		210,021		188,935	588,175	511,610
Revenue from contracts with customers		262,092		234,806	775,352	647,729
Institutional Group [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	129,179		84,087	333,442	218,962
Institutional Group [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	80,842		104,848	254,733	292,648
Institutional Group [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		17		12	50	41
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		794		634	2,304	2,160
Other		794		634	2,304	2,160
United States [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		583,948		546,001	1,709,297	1,558,631
United States [Member] | Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		374,013		350,147	1,097,665	1,011,553
United States [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		209,141		195,220	609,328	544,918
United States [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		794		634	2,304	2,160
United Kingdom [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		30,959		38,249	110,053	99,020
United Kingdom [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		30,959		38,249	110,053	99,020
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		21,992		1,337	55,971	3,791
Other [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		$ 21,992		$ 1,337	$ 55,971	$ 3,791
[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 ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Receivables related to contract with customers	$ 156,500,000	$ 151,300,000
Impairment related to receivables	0
Deferred Revenue	$ 15,100,000	$ 11,300,000

Interest Income and Interest _3

Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest Income Expense Net [Abstract]
Loans held for investment, net	$ 76,281	$ 95,436	$ 250,565	$ 284,541
Investment securities	31,966	54,945	121,630	182,127
Margin balances	5,803	13,334	22,298	40,437
Financial instruments owned	2,924	5,668	10,357	18,395
Other	(2,563)	9,401	(894)	32,295
Total interest income	114,411	178,784	403,956	557,795
Bank deposits	1,478	24,815	13,324	82,228
Senior notes	15,411	11,121	39,677	33,365
Federal Home Loan Bank advances	515	1,146	3,550	5,735
Other	(3,582)	7,062	(5,288)	25,155
Total interest expense	$ 13,822	$ 44,144	$ 51,263	$ 146,483

Employee Incentive, Deferred _2

Employee Incentive, Deferred Compensation, And Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to grant			6,400,000
Stock-based compensation			$ 80,987	$ 78,329
Contributions to 401(k) Plan	$ 3,900	$ 3,200	11,000	9,600
Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 39,700	$ 33,600	$ 116,000	$ 97,400
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	14,500,000		14,500,000
Unvested stock awards outstanding	12,500,000		12,500,000
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 in years			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	$ 514,400		$ 514,400
Weighted-average period, compensation cost expected to recognized, in years			2 years 8 months 12 days
SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Elective deferrals vested percentage	100.00%		100.00%
Percentage of earnings deferred into company stock units	5.00%		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	9 Months Ended
	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
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	$ 1,900		$ 2,300
Fair value of collateral securities sold or repledged	182.3		391.6
Outstanding commitments to originate loans	1		384.5
Letters of credit outstanding	31.1		38.3
Unfunded Commitment [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Expected credit losses	21.2
Accounts Payable and Accrued Expenses [Member] | Unfunded Commitment [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Reserve for unfunded commitments		$ 20.4
Unused Lines Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unused lines of credit to commercial and consumer borrowers	$ 2,100		$ 1,500
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)	9 Months Ended
	Sep. 30, 2020Segment
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		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 883,300	$ 821,572	$ 2,692,151	$ 2,392,779
Income/(loss) before income taxes		158,393	150,754	416,459	436,545
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	526,836	534,571	1,615,574	1,577,614
Income/(loss) before income taxes		178,930	202,823	529,422	589,665
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	363,365	290,222	1,093,699	822,110
Income/(loss) before income taxes		76,841	48,623	201,630	120,129
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	(6,901)	(3,221)	(17,122)	(6,945)
Income/(loss) before income taxes		$ (97,378)	$ (100,692)	$ (314,593)	$ (273,249)
[1]	No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2020 or 2019.

Segment Reporting (Schedule O_2

Segment Reporting (Schedule Of Operating Information, Segment) (Parenthetical) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Net revenues accounted for by individual client, maximum percentage	10.00%	10.00%	10.00%	10.00%

Segment Reporting (Schedule O_3

Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 25,549,182	$ 24,610,225
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	20,784,329	20,675,580
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	3,806,220	3,668,723
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 958,633	$ 265,922

Segment Reporting (Schedule O_4

Segment Reporting (Schedule Of Net Revenues Earned On Major Geographical Areas) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Total net revenues	[1]	$ 883,300	$ 821,572	$ 2,692,151	$ 2,392,779
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues		814,301	775,356	2,485,336	2,271,056
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues		45,705	43,632	147,097	113,783
Other [Member]
Segment Reporting Information [Line Items]
Total net revenues		$ 23,294	$ 2,584	$ 59,718	$ 7,940
[1]	No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2020 or 2019.

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income applicable to Stifel Financial Corp.	$ 120,527	$ 109,414	$ 315,003	$ 317,706
Preferred dividends	9,897	4,844	19,584	12,476
Net income available to common shareholders	$ 110,630	$ 104,570	$ 295,419	$ 305,230
Average shares used in basic computation	70,627	71,197	70,814	72,512
Dilutive effect of stock options and units	5,223	6,947	4,898	6,314
Average shares used in diluted computation	75,850	78,144	75,712	78,826
Basic	$ 1.57	$ 1.47	$ 4.17	$ 4.21
Diluted	$ 1.46	$ 1.34	$ 3.90	$ 3.87

Earnings Per Share (Details)

Earnings Per Share (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Cash dividends declared per common share	$ 0.17	$ 0.15	$ 0.51	$ 0.45
Cash dividends paid per common share	$ 0.17	$ 0.15	$ 0.51	$ 0.45

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	May 19, 2020	Feb. 21, 2019	Mar. 31, 2019	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to be repurchased					8,900,000
Purchase of treasury stock				$ 55,500	$ 56,500	$ 180,400
Treasury stock acquired, Shares,				1,000,000	1,100,000	3,300,000
Treasury Stock Acquired, Average Cost Per Share				$ 55.43	$ 49.62	$ 55.10
Stock Repurchase Program, Authorized Amount					$ 0
Preferred stock, par value				$ 1	$ 1	$ 1	$ 1
Non-Cumulative Perpetual Preferred Stock, Series C [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock	$ 225,000
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
Series C Preferred Stock [Member] | Over-Allotment Option [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock	$ 25,000
Non-Cumulative Perpetual Preferred Stock, Series B [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock		$ 150,000
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
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			$ 10,000
Business Bancshares, Inc. [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of common stock					1,400,000

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Assets in partnership	$ 25,549,182	$ 24,610,225
Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets in partnership	$ 254,200

Subsequent Events (Details)

Subsequent Events (Details)	9 Months Ended
	Sep. 30, 2020Event
Subsequent Events [Abstract]
Number of types of subsequent events	2