Stifel Financial (SF) 10-Q 8 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	SF
Entity Registrant Name	STIFEL FINANCIAL CORP
Entity Central Index Key	0000720672
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		70,763,765

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents		$ 777,781	$ 1,936,560
Cash segregated for regulatory purposes		73,684	132,814
Receivables:
Brokerage clients, net		1,384,238	1,201,477
Brokers, dealers, and clearing organizations		588,501	515,574
Securities purchased under agreements to resell	[1]	568,034	699,900
Financial instruments owned, at fair value		1,297,491	1,267,449
Available-for-sale securities, at fair value		3,003,767	3,070,447
Held-to-maturity securities, at amortized cost	[2]	4,103,562	4,218,854
Loans:
Held for investment, net		8,706,689	8,517,615
Held for sale, at lower of cost or market		144,216	205,557
Investments, at fair value		70,225	67,982
Fixed assets, net		1,077,891	372,939
Goodwill		1,056,111	1,034,679
Intangible assets, net		123,830	119,655
Loans and advances to financial advisors and other employees, net		437,728	408,436
Deferred tax assets, net		105,388	112,008
Other assets		664,423	637,652
Total assets		24,183,559	24,519,598
Payables:
Brokerage clients		637,150	837,379
Brokers, dealers, and clearing organizations		586,890	432,299
Drafts		100,624	104,887
Securities sold under agreements to repurchase	[3]	466,284	535,394
Bank deposits		15,049,877	15,863,613
Financial instruments sold, but not yet purchased, at fair value		979,116	947,306
Accrued compensation		201,170	460,347
Accounts payable and accrued expenses		1,004,165	344,152
Federal Home Loan Bank advances		250,000	540,000
Borrowings		398,970	180,655
Senior notes		1,016,116	1,015,973
Debentures to Stifel Financial Capital Trusts		60,000	60,000
Total liabilities		20,750,362	21,322,005
Commitments and contingent liabilities
Stifel Financial Corp. shareholders' equity:
Preferred stock - $1 par value; authorized 3,000,000 shares; issued 12,400 and 6,000 shares, respectively		310,000	150,000
Common stock - $0.15 par value; authorized 194,000,000 shares; issued 74,441,046 and 74,441,017 shares, respectively		11,166	11,166
Additional paid-in-capital		1,826,604	1,893,304
Retained earnings		1,443,658	1,366,503
Accumulated other comprehensive loss		(46,381)	(72,523)
Treasury stock, at cost, 3,416,380 and 3,639,399 shares, respectively		(168,424)	(180,857)
Total Stifel Financial Corp. shareholders’ equity		3,376,623	3,167,593
Non-controlling interests		56,574	30,000
Total equity		3,433,197	3,197,593
Total liabilities and equity		$ 24,183,559	$ 24,519,598
[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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, respectively.
[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.
[3]	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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, respectively.

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
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	12,400	6,000
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	194,000,000	194,000,000
Common stock, shares issued	74,441,046	74,441,017
Treasury stock, shares	3,416,380	3,639,399

Consolidated Statements Of Oper

Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenues
Revenue from contracts with customers		$ 516,338	$ 541,656
Principal transactions		104,032	97,782
Interest		191,071	137,734
Other income		12,209	3,357
Total revenues		819,868	776,811
Interest expense		49,448	26,453
Net revenues	[1]	770,420	750,358
Non-interest expenses
Compensation and benefits		458,114	457,893
Occupancy and equipment rental		58,862	57,595
Communications and office supplies		35,697	33,499
Commissions and floor brokerage		10,956	9,365
Other operating expenses		68,982	72,452
Total non-interest expenses		632,611	630,804
Income from operations before income tax expense		137,809	119,554
Provision for income taxes		38,370	30,793
Net income		99,439	88,761
Net income applicable to non-controlling interests		232
Net income applicable to Stifel Financial Corp.		99,207	88,761
Preferred dividends		2,344	2,344
Net income available to common shareholders		$ 96,863	$ 86,417
Earnings per common share
Basic		$ 1.35	$ 1.20
Diluted		1.22	1.06
Cash dividends declared per common share		$ 0.15	$ 0.12
Weighted-average number of common shares outstanding
Basic		71,700	71,999
Diluted		79,210	81,789
Commissions [Member]
Revenues
Revenue from contracts with customers		$ 155,449	$ 165,775
Investment Banking [Member]
Revenues
Revenue from contracts with customers		161,840	176,362
Asset Management and Service Fees [Member]
Revenues
Revenue from contracts with customers		$ 195,267	$ 195,801
[1]	No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2019 or 2018.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 99,439	$ 88,761
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains/(losses) on available-for-sale securities	[1],[2],[3]	25,800	(13,071)
Changes in unrealized gains/(losses) on cash flow hedging instruments	[1],[2],[4]	(1,826)	2,706
Foreign currency translation adjustment	[1],[2]	2,168	3,736
Total other comprehensive income/(loss), net of tax		26,142	(6,629)
Comprehensive income		125,581	82,132
Net income applicable to non-controlling interests		232
Comprehensive income applicable to Stifel Financial Corp.		$ 125,349	$ 82,132
[1]	Net of tax expense of $10.1 million and tax benefit of $2.3 million for the three months ended March 31, 2019 and 2018, respectively.
[2]	The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio credit risk.
[3]	There were no reclassifications to earnings during the three months ended March 31, 2019 and 2018, respectively.
[4]	Amounts are net of reclassifications to earnings of gains of $1.5 million and $0.5 million for the three months ended March 31, 2019 and 2018, respectively.

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other comprehensive income/(loss), tax	$ 10.1	$ (2.3)
Reclassifications to earnings on available-for-sale securities	0	0
Reclassifications to earnings of gains on cash flow hedging instruments	1.5	$ 0.5
ASU 2018-02 [Member]
Reclassification to retained earnings related to cash flow hedges and investment portfolio credit risk	$ 3.1

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock at Cost [Member]	Parent [Member]	Non-controlling Interests [Member]
Balance, beginning of period at Dec. 31, 2017				$ 150,000	$ 10,746	$ 1,733,348	$ 1,033,526	$ (26,736)	$ (39,308)
Common stock issued under employee plans					123				12,542
Common stock repurchased		$ (2,800)							(2,839)
Unit amortization, net of forfeitures						28,154
Net income		88,761					88,761
Dividends declared, Common							(8,629)
Dividends declared, Preferred							(2,344)
Common stock issued under employee plans and related tax benefits						(43,391)	(7,964)
Issuance of common stock for acquisitions						(56)
Dividends declared to equity-award holders						1,651
Unrealized gains/(losses) on securities, net of tax								(13,071)
Unrealized gains/(losses) on cash flow hedging activities, net of tax								2,706
Foreign currency translation adjustment, net of tax		3,736	[1],[2]					3,736
Other				(32)		4	787
Balance, end of period at Mar. 31, 2018		2,917,540		149,968	10,869	1,719,710	1,103,013	(36,415)	(29,605)	$ 2,917,540
Cumulative adjustments for accounting changes	[3]						(1,124)	(3,050)
Balance, beginning of period at Dec. 31, 2018		3,197,593		150,000	11,166	1,893,304	1,366,503	(72,523)	(180,857)		$ 30,000
Common stock issued under employee plans									66,302
Common stock repurchased		(53,900)							(53,869)
Unit amortization, net of forfeitures						33,317
Net income		99,207					99,439				232
Dividends declared, Common							(12,944)
Dividends declared, Preferred							(2,344)
Common stock issued under employee plans and related tax benefits						(95,295)	27
Issuance of preferred stock				160,000		(4,706)
Unrealized gains/(losses) on securities, net of tax								25,800
Unrealized gains/(losses) on cash flow hedging activities, net of tax								(1,826)
Foreign currency translation adjustment, net of tax		2,168	[1],[2]					2,168
Other						(16)	(264)
Capital contributions from non-controlling interest holders											26,800
Distributions to non-controlling interest holders											(458)
Balance, end of period at Mar. 31, 2019		$ 3,433,197		$ 310,000	$ 11,166	$ 1,826,604	1,443,658	$ (46,381)	$ (168,424)	$ 3,376,623	$ 56,574
Cumulative adjustments for accounting changes	[3]						$ (6,759)
[1]	Net of tax expense of $10.1 million and tax benefit of $2.3 million for the three months ended March 31, 2019 and 2018, respectively.
[2]	The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio credit risk.
[3]	Cumulative adjustments for accounting changes relate to the adoption of certain accounting updates during 2019 and 2018. See Note 2 to the consolidated financial statements for further information. The 2018 adjustments are described further in Note 2 to the consolidated financial statements in our 2018 Form 10-K.

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (Unaudited) - $ / shares	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Statement Of Stockholders Equity [Abstract]
Preferred stock, par value	$ 1	$ 1	$ 1
Common stock, par value	$ 0.15	$ 0.15	$ 0.15

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities:
Net income	$ 99,439	$ 88,761
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	10,290	6,664
Amortization of loans and advances to financial advisors and other employees	21,596	19,141
Amortization of premium on investment portfolio	8,727	5,646
Provision for loan losses and allowance for loans and advances to financial advisors and other employees	1,611	2,658
Amortization of intangible assets	3,593	2,738
Deferred income taxes	2,102	16,487
Stock-based compensation	32,119	27,072
(Gains)/losses on sale of investments	(2,174)	2,884
Other, net	(6,429)	(3,871)
Receivables:
Brokerage clients	(182,761)	(56,146)
Brokers, dealers, and clearing organizations	(72,766)	(85,843)
Securities purchased under agreements to resell	131,866	(156,782)
Financial instruments owned, including those pledged	2,641	(37,363)
Loans originated as held for sale	(272,301)	(404,200)
Proceeds from mortgages held for sale	333,478	373,919
Loans and advances to financial advisors and other employees	(50,216)	(5,599)
Other assets	(24,357)	(69,119)
Increase/(decrease) in operating liabilities, net of liabilities assumed:
Brokerage clients	(200,229)	(29,277)
Brokers, dealers, and clearing organizations	21,639	18,703
Drafts	(4,263)	(30,872)
Financial instruments sold, but not yet purchased	31,754	180,672
Other liabilities and accrued expenses	(252,199)	(238,121)
Net cash used in operating activities	(366,840)	(371,848)
Cash Flows From Investing Activities:
Maturities and principal paydowns of available-for-sale securities	93,349	129,926
Calls and principal paydowns of held-to-maturity securities	114,535	230,172
Sale or maturity of investments		9,575
Increase in bank loans, net	(195,186)	(130,566)
Payments for:
Purchase of fixed assets	(72,868)	(4,586)
Purchase of available-for-sale securities	(250)	(92,145)
Purchase of held-to-maturity securities		(379,490)
Acquisitions, net of cash received	(28,523)	(29,209)
Net cash used in investing activities	(88,943)	(266,323)
Cash Flows From Financing Activities:
Proceeds from borrowings, net	218,315	60,000
Proceeds from Federal Home Loan Bank advances, net		82,000
Repayments of Federal Home Loan Bank advances, net	(290,000)
Payment of contingent consideration	(2,994)	(7,900)
Increase/(decrease) in securities sold under agreements to repurchase	(93,419)	112,498
Decrease in bank deposits, net	(813,736)	(82,312)
Increase in securities loaned	132,952	209,590
Tax payments related to shares withheld for stock-based compensation plans	(27,847)	(36,534)
Proceeds from preferred stock issuance, net	155,294
Proceeds from non-controlling interests	26,800
Proceeds from stock option exercises		774
Repurchase of common stock	(53,869)	(2,839)
Cash dividends on preferred stock	(2,344)	(2,344)
Cash dividends paid to common stock and equity-award holders	(12,944)	(8,629)
Other	(490)
Net cash (used in)/provided by financing activities	(764,282)	324,304
Effect of exchange rate changes on cash	2,156	3,736
Decrease in cash and cash equivalents	(1,217,909)	(310,131)
Cash and cash equivalents at beginning of period	2,069,374	787,085
Cash and cash equivalents at end of period	851,465	476,954
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net of refunds/(refunds, net of taxes paid)	466	(21,076)
Cash paid for interest	49,425	25,368
Noncash financing activities:
Unit grants, net of forfeitures	$ 92,344	$ 90,678

Cash, Cash Equivalents, and Cas

Cash, Cash Equivalents, and Cash Restricted for Regulatory Purposes for Periods Presented in Consolidated Statement of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 777,781	$ 1,936,560
Cash segregated for regulatory purposes	73,684	132,814
Total cash, cash equivalents, and cash segregated for regulatory purposes	$ 851,465	$ 2,069,374

Nature of Operations, Basis of

Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
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. We have offices throughout the United States and Europe. Our major geographic area of concentration is throughout the United States, with a growing presence in the United Kingdom and Europe. Our company’s principal customers are individual investors, corporations, municipalities, and institutions. On January 2, 2019, the Company completed the acquisition of First Empire Holding Corp. (“First Empire”) and its subsidiaries, including First Empire Securities, Inc., an institutional broker-dealer specializing in the fixed income markets. See Note 8 in the notes to consolidated financial statements for more details. Pro forma information is not presented, because the acquisition is not considered to be material, as defined by the SEC. The results of operations of First Empire have been included in our results prospectively from the date of acquisition. 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., and Stifel Bancorp, Inc. (“Stifel Bancorp”). 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, 2018 on file with the SEC. 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 represents a 27.5% third-party ownership of North Shore Aviation Holdings LLC (“North Shore”), a wholly owned subsidiary of the Company, that through its subsidiary owns airplane engines. We also 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. In determining whether to consolidate these entities, we evaluate whether the entity is a voting interest entity or a variable interest entity (“VIE”). When we do not have a controlling interest in an entity, but we exert significant influence over the entity, we apply the equity method of accounting. See Note 25 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, 2018. During the three months ended March 31, 2019, 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. 2016-02, “Leases” (the “new lease standard” or “ASU 2016-02”) on January 1, 2019. These lease policy updates are applied prospectively in our consolidated financial statements from January 1, 2019. 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. Operating Leases Our company enters into operating leases for real estate, office equipment and other assets, substantially all of which are used in connection with its operations. We adopted ASU 2016-02 on January 1, 2019, which required our company to recognize, for leases longer than one year, a right-of-use asset representing the right to use the underlying asset for the lease term, and a lease liability representing the liability to make payments. The lease term is generally determined based on the contractual maturity of the lease. For leases where our company has the option to terminate or extend the lease, an assessment of the likelihood of exercising the option is incorporated into the determination of the lease term. Such assessment is initially performed at the inception of the lease and is updated if events occur that impact the original assessment. An operating lease right-of-use asset is initially determined based on the operating lease liability, adjusted for initial direct costs, lease incentives and amounts paid at or prior to lease commencement. This amount is then amortized over the lease term. See Note 17 for information about operating leases. For leases where our company ceased using the space and management has concluded that it will not derive any future economic benefits, we record an impairment of right-of-use assets.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
Prospective Adoption Of New Accounting Pronouncements [Abstract]
New Accounting Pronouncements	NOTE 2 – New Accounting Pronouncements Recently Adopted Accounting Guidance Fair Value Measurement In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The objective of this guidance is to improve the effectiveness of disclosure requirements on fair value measurement by eliminating certain disclosure requirements for fair value measurements for all entities, requiring public entities to disclose certain new information and modifying some disclosure requirements. The accounting update is effective for the fiscal year beginning after December 15, 2019 (January 1, 2020 for our company) and early adoption is permitted. We early adopted the guidance in the update on January 1, 2019. The adoption of the accounting update did not have a material impact on our consolidated financial statements. See Note 4 for further information. Derivatives and Hedging In August 2017, the FASB issued ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities,” which amends the hedge accounting recognition and presentation requirements. The accounting update improves the transparency and understandability of information conveyed to financial statement users by better aligning companies’ hedging relationship to their existing risk management strategies, simplifies the application of hedge accounting and increases transparency regarding the scope and results of hedging program. The accounting update is effective for the fiscal year beginning after December 15, 2018 (January 1, 2019 for our company). The adoption of the accounting update did not have a material impact on our consolidated financial statements. See Note 12 for further information. Callable Debt Securities In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities,” which shortens the amortization period for the premium on certain callable debt securities to the earliest call date. The amendments are applicable to any purchased individual debt security with an explicit and non-contingent call feature that is callable at a fixed price on a preset date. The accounting update is effective for fiscal years beginning after December 15, 2018 (January 1, 2019 for our company) under a modified retrospective approach. The change was applied prospectively from January 1, 2019 and there is no impact to our previously presented results. The adoption of the accounting update resulted in a reduction of beginning retained earnings of $4.4 million after-tax as a cumulative effect of adoption of an accounting change. Leases In February 2016, the FASB issued ASU 2016-02 that requires for leases longer than one year, a lessee recognize in the statements of financial condition a right-of-use asset, representing the right to use the underlying asset for the lease term, and a lease liability, representing the liability to make lease payments. The accounting update also requires that for finance leases, a lessee recognize interest expense on the lease liability, separately from the amortization of the right-of-use asset in the statements of earnings, while for operating leases, such amounts should be recognized as a combined expense. In addition, this accounting update requires expanded disclosures about the nature and terms of lease agreements. This change was applied prospectively from January 1, 2019 and there is no impact on our previously presented results. Upon adoption, in accordance with the new lease standard, we elected to not reassess the lease classification or initial direct costs of existing leases, and to not reassess whether existing contracts contain a lease. In addition, we have elected to account for each contract’s lease and non-lease components as a single lease component. The adoption of the new lease standard resulted in a reduction of beginning retained earnings of $2.4 million after-tax as a cumulative effect of adoption of an accounting change. Upon adoption, the company recorded a gross up of approximately $670 million on its consolidated statements of financial condition to recognize the right-of-use assets, included in fixed assets, net and lease liabilities, included in accounts payable and accrued expenses. Recently Issued Accounting Guidance Goodwill Impairment Testing In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment,” 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 accounting update is effective for annual or any interim impairment tests in fiscal years beginning after December 15, 2019 (January 1, 2020 for our company) and early adoption is permitted. We are currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements. Financial Instruments – Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments − Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” 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 will replace the loss model currently applicable to bank loans, held-to-maturity securities, and other receivables carried at amortized cost. The accounting update also eliminates the concept of other-than-temporary impairment for available-for-sale securities. Impairments on available-for-sale securities will be required to be recognized in earnings through an allowance, when the fair value is less than amortized cost and a credit loss exists or the securities are expected to be sold before recovery of amortized cost. Under the accounting update, there may be an ability to determine there are no expected credit losses in certain circumstances, e.g., based on collateral arrangements for lending and financing transactions or based on the credit quality of the borrower or issuer. Overall, the amendments in this accounting update are expected to accelerate the recognition of credit losses for portfolios where CECL models will be applied. The accounting update is effective for fiscal years beginning after December 15, 2019 (January 1, 2020 for our company) with early adoption permitted as of January 1, 2019. We are currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements.

Receivables From And Payables T

Receivables From And Payables To Brokers, Dealers And Clearing Organizations	3 Months Ended
	Mar. 31, 2019
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables From And Payables To Brokers, Dealers And Clearing Organizations	NOTE 3 – Receivables From and Payables to Brokers, Dealers, and Clearing Organizations Amounts receivable from brokers, dealers, and clearing organizations at March 31, 2019 and December 31, 2018, included (in thousands) March 31, 2019 December 31, 2018 Receivables from clearing organizations $ 447,084 $ 320,277 Deposits paid for securities borrowed 115,223 109,795 Securities failed to deliver 26,194 85,502 $ 588,501 $ 515,574 Amounts payable to brokers, dealers, and clearing organizations at March 31, 2019 and December 31, 2018, included (in thousands) March 31, 2019 December 31, 2018 Deposits received from securities loaned $ 525,115 $ 392,163 Securities failed to receive 31,618 27,975 Payable to clearing organizations 30,157 12,161 $ 586,890 $ 432,299 Deposits paid for securities borrowed approximate the market value of the securities. Securities failed to deliver and receive represent the contract value of securities that have not been delivered or received on settlement date.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
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, U.S. government securities, and U.S. government agency 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, sovereign debt, corporate fixed income and equity securities infrequently traded, state and municipal securities, and asset-backed securities, which primarily include collateralized loan obligations. We have identified Level 3 financial instruments to include certain equity securities with unobservable pricing inputs and certain non-agency mortgage-backed securities. 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 valued based upon our expectations of issuer redemptions and using internal discounted cash flow models that utilize unobservable inputs. ARS are reported as Level 3 assets. Direct investments in private companies may be valued using the market approach and were valued based on an assessment of each underlying investment, incorporating evaluation of additional significant third-party financing, changes in valuations of comparable peer companies, the business environment of the companies, market indices, assumptions relating to appropriate risk adjustments for nonperformance, and legal restrictions on disposition, among other factors. The fair value derived from the methods used are evaluated and weighted, as appropriate, considering the reasonableness of the range of values indicated. Under the market approach, fair value may be determined by reference to multiples of market-comparable companies or transactions, including earnings before interest, taxes, depreciation, and amortization (“EBITDA”) multiples. For securities utilizing the market comparable companies valuation technique, a significant increase (decrease) in the EBITDA multiple in isolation could result in a significantly higher (lower) fair value measurement. Investments in Funds That Are Measured at Net Asset Value Per Share 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 tables below present the fair value of our investments in, and unfunded commitments to, funds that are measured at NAV (in thousands): March 31, 2019 Fair value of investments Unfunded commitments Money market funds $ 20,691 $ — Mutual funds 7,018 — Private equity funds 3,426 1,480 Partnership interests 4,153 1,018 Total $ 35,288 $ 2,498 December 31, 2018 Fair value of investments Unfunded commitments Money market funds $ 19,719 $ — Mutual funds 9,122 — Private equity funds 3,461 1,480 Partnership interests 3,976 1,024 Total $ 36,278 $ 2,504 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. 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 March 31, 2019, are presented below (in thousands) March 31, 2019 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 27,326 $ 27,326 $ — $ — U.S. government agency securities 117,701 — 117,701 — Mortgage-backed securities: Agency 514,718 — 514,718 — Non-agency 8,159 — 8,159 — Asset-backed securities 56,514 — 56,339 175 Corporate securities: Fixed income securities 336,317 1,946 334,371 — Equity securities 54,779 54,711 68 — Sovereign debt 2,351 — 2,351 — State and municipal securities 179,626 — 179,626 — Total financial instruments owned 1,297,491 83,983 1,213,333 175 Available-for-sale securities: U.S. government agency securities 5,368 418 4,950 — State and municipal securities 49,118 — 49,118 — Mortgage-backed securities: Agency 215,417 — 215,417 — Commercial 71,377 — 71,377 — Non-agency 1,148 — 1,148 — Corporate fixed income securities 947,588 — 947,588 — Asset-backed securities 1,713,751 — 1,713,751 — Total available-for-sale securities 3,003,767 418 3,003,349 — Investments: Corporate equity securities 37,264 36,077 1,187 — Auction rate securities: Equity securities 16,632 — — 16,632 Municipal securities 704 — — 704 Other 1,028 — 175 853 Investments in funds measured at NAV 14,597 Total investments 70,225 36,077 1,362 18,189 Cash equivalents measured at NAV 20,691 Derivative contracts (1) 4,896 — 4,896 — $ 4,397,070 $ 120,478 $ 4,222,940 $ 18,364 (1) March 31, 2019 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 548,357 $ 548,357 $ — $ — U.S. government agency securities 49 — 49 — Mortgage-backed securities: Agency 180,287 — 180,287 — Corporate securities: Fixed income securities 195,642 269 195,373 — Equity securities 53,182 53,182 — — Sovereign debt 1,599 — 1,599 — Total financial instruments sold, but not yet purchased $ 979,116 $ 601,808 $ 377,308 $ — Assets and liabilities measured at fair value on a recurring basis as of December 31, 2018, are presented below (in thousands) December 31, 2018 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 42,121 $ 42,121 $ — $ — U.S. government agency securities 72,532 — 72,532 — Mortgage-backed securities: Agency 564,111 — 564,111 — Non-agency 25,727 — 25,726 1 Asset-backed securities 25,905 — 25,730 175 Corporate securities: Fixed income securities 310,457 1,100 309,357 — Equity securities 57,911 57,125 786 — Sovereign debt 14,063 — 14,063 — State and municipal securities 154,622 — 154,622 — Total financial instruments owned 1,267,449 100,346 1,166,927 176 Available-for-sale securities: U.S. government agency securities 5,215 417 4,798 — State and municipal securities 68,226 — 68,226 — Mortgage-backed securities: Agency 230,408 — 230,408 — Commercial 69,715 — 69,715 — Non-agency 1,219 — 1,219 — Corporate fixed income securities 931,604 — 931,604 — Asset-backed securities 1,764,060 — 1,764,060 — Total available-for-sale securities 3,070,447 417 3,070,030 — Investments: Corporate equity securities 33,046 31,670 1,376 — Auction rate securities: Equity securities 16,632 — — 16,632 Municipal securities 704 — — 704 Other 1,041 — 184 857 Investments measured at NAV 16,559 Total investments 67,982 31,670 1,560 18,193 Cash equivalents measured at NAV 19,719 Derivative contracts (1) 7,683 — 7,683 — $ 4,433,280 $ 132,433 $ 4,246,200 $ 18,369 (1) December 31, 2018 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 534,817 $ 534,817 $ — $ — U.S. government agency securities 32,755 — 32,755 — Mortgage-backed securities: Agency 123,456 — 123,456 — Corporate securities: Fixed income securities 208,725 1,289 207,436 — Equity securities 36,117 35,398 719 — Sovereign debt 11,429 — 11,429 — State and municipal securities 7 — 7 — Total financial instruments sold, but not yet purchased $ 947,306 $ 571,504 $ 375,802 $ — The following table summarizes the changes in fair value associated with Level 3 financial instruments during the three months ended March 31, 2019 (in thousands) Three Months Ended March 31, 2019 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Asset-Backed Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2018 $ 1 $ 175 $ 16,632 $ 704 $ 857 Unrealized gains/(losses): Included in changes in net assets (1) — — — — — Realized gains/(losses) (1) (1 ) — — — — Purchases — — — — — Sales — — — — — Redemptions — — — — (4 ) Transfers: Into Level 3 — — — — — Out of Level 3 — — — — — Net change (1 ) — — — (4 ) Balance at March 31, 2019 $ — $ 175 $ 16,632 $ 704 $ 853 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. The results included in the table above are only a component of the overall investment strategies of our company. The table above does not present Level 1 or Level 2 valued assets or liabilities. The changes in unrealized gains/(losses) recorded in earnings for the three months ended March 31, 2019, relating to Level 3 assets still held at March 31, 2019, were immaterial. The following table summarizes quantitative information related to the significant unobservable inputs utilized in our company’s Level 3 recurring fair value measurements as of March 31, 2019. Valuation technique Unobservable input Range Weighted average Investments: Auction rate securities: Equity securities Discounted cash flow Discount rate 0.0% - 5.6% 3.2% Workout period 2-3 years 2.4 years Municipal securities Discounted cash flow Discount rate 0.7% - 8.3% 2.8% Workout period 1-4 years 2.0 years 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. The discount rate was calculated using credit spreads of the underlying collateral or similar securities. The workout period was based on an assessment of publicly available information on efforts to re-establish functioning markets for these securities and our company’s own redemption experience. Significant increases in any of these inputs in isolation would result in a significantly lower fair value. On an ongoing basis, management verifies the fair value by reviewing the appropriateness of the discounted cash flow model and its significant inputs. Fair Value of Financial Instruments The following reflects the fair value of financial instruments as of March 31, 2019 and December 31, 2018, whether or not recognized in the consolidated statements of financial condition at fair value (in thousands) March 31, 2019 December 31, 2018 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 777,781 $ 777,781 $ 1,936,560 $ 1,936,560 Cash segregated for regulatory purposes 73,684 73,684 132,814 132,814 Securities purchased under agreements to resell 568,034 568,034 699,900 699,900 Financial instruments owned 1,297,491 1,297,491 1,267,449 1,267,449 Available-for-sale securities 3,003,767 3,003,767 3,070,447 3,070,447 Held-to-maturity securities 4,103,562 4,056,845 4,218,854 4,122,907 Bank loans 8,706,689 8,782,968 8,517,615 8,565,347 Loans held for sale 144,216 144,216 205,557 205,557 Investments 70,225 70,225 67,982 67,982 Derivative contracts (1) 4,896 4,896 7,683 7,683 Financial liabilities: Securities sold under agreements to repurchase $ 466,284 $ 466,284 $ 535,394 $ 535,394 Bank deposits 15,049,877 14,065,660 15,863,613 14,661,996 Financial instruments sold, but not yet purchased 979,116 979,116 947,306 947,306 Federal Home Loan Bank advances 250,000 250,000 540,000 540,000 Borrowings 398,970 398,970 180,655 180,655 Senior notes 1,016,116 1,034,487 1,015,973 989,790 Debentures to Stifel Financial Capital Trusts 60,000 47,513 60,000 49,747 (1) The following table presents the estimated fair values of financial instruments not measured at fair value on a recurring basis as of March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 757,090 $ 757,090 $ — $ — Cash segregated for regulatory purposes 73,684 73,684 — — Securities purchased under agreements to resell 568,034 552,229 15,805 — Held-to-maturity securities 4,056,845 — 3,895,569 161,276 Bank loans 8,782,968 — 8,782,968 — Loans held for sale 144,216 — 144,216 — Financial liabilities: Securities sold under agreements to repurchase $ 466,284 $ 51,978 $ 414,306 $ — Bank deposits 14,065,660 — 14,065,660 — Federal Home Loan Bank advances 250,000 250,000 — — Borrowings 398,970 398,970 — — Senior notes 1,034,487 1,034,487 — — Debentures to Stifel Financial Capital Trusts 47,513 — — 47,513 December 31, 2018 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,916,841 $ 1,916,841 $ — $ — Cash segregated for regulatory purposes 132,814 132,814 — — Securities purchased under agreements to resell 699,900 645,632 54,268 — Held-to-maturity securities 4,122,907 — 3,960,099 162,808 Bank loans 8,565,347 — 8,565,347 — Loans held for sale 205,557 — 205,557 — Financial liabilities: Securities sold under agreements to repurchase $ 535,394 $ 87,273 $ 448,121 $ — Bank deposits 14,661,996 — 14,661,996 — Federal Home Loan Bank advances 540,000 540,000 — — Borrowings 180,655 180,655 — — Senior notes 989,790 989,790 — — Debentures to Stifel Financial Capital Trusts 49,747 — — 49,747 The following, as supplemented by the discussion above, describes the valuation techniques used in estimating the fair value of our financial instruments as of March 31, 2019 and December 31, 2018. Financial Assets Securities Purchased Under Agreements to Resell Securities purchased under agreements to resell are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. The carrying values at March 31, 2019 and December 31, 2018 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 March 31, 2019 and December 31, 2018 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. Borrowings The carrying amount of borrowings approximates fair value due to the relative short-term nature of such borrowings. In addition, Stifel Bancorp’s 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	3 Months Ended
	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased	NOTE 5 – Financial Instruments Owned and Financial Instruments Sold, But Not Yet Purchased The components of financial instruments owned and financial instruments sold, but not yet purchased, at March 31, 2019 and December 31, 2018 are as follows (in thousands) March 31, 2019 December 31, 2018 Financial instruments owned: U.S. government securities $ 27,326 $ 42,121 U.S. government agency securities 117,701 72,532 Mortgage-backed securities: Agency 514,718 564,111 Non-agency 8,159 25,727 Asset-backed securities 56,514 25,905 Corporate securities: Fixed income securities 336,317 310,457 Equity securities 54,779 57,911 Sovereign debt 2,351 14,063 State and municipal securities 179,626 154,622 $ 1,297,491 $ 1,267,449 Financial instruments sold, but not yet purchased: U.S. government securities $ 548,357 $ 534,817 U.S. government agency securities 49 32,755 Mortgage-backed securities: Agency 180,287 123,456 Corporate securities: Fixed income securities 195,642 208,725 Equity securities 53,182 36,117 Sovereign debt 1,599 11,429 State and municipal securities — 7 $ 979,116 $ 947,306 At March 31, 2019 and December 31, 2018, financial instruments owned in the amount of $860.3 million and $669.0 million, respectively, were pledged as collateral for our repurchase agreements and short-term borrowings. Our financial instruments owned are presented on a trade-date basis in the consolidated statements of financial condition. Financial instruments sold, but not yet purchased, represent obligations of our company to deliver the specified security at the contracted price, thereby creating a liability to purchase the security in the market at prevailing prices in future periods. We are obligated to acquire the securities sold short at prevailing market prices in future periods, which may exceed the amount reflected in the consolidated statements of financial condition.

Available-For-Sale And Held-To-

Available-For-Sale And Held-To-Maturity Securities	3 Months Ended
	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Available-For-Sale And Held-To-Maturity Securities	NOTE 6 – Available-for-Sale and Held-to-Maturity Securities The following tables provide a summary of the amortized cost and fair values of the available-for-sale securities and held-to-maturity securities at March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,367 $ 23 $ (22 ) $ 5,368 State and municipal securities 49,011 107 — 49,118 Mortgage-backed securities: Agency 216,959 325 (1,867 ) 215,417 Commercial 74,117 4 (2,744 ) 71,377 Non-agency 1,176 — (28 ) 1,148 Corporate fixed income securities 950,997 2,007 (5,416 ) 947,588 Asset-backed securities 1,726,984 561 (13,794 ) 1,713,751 $ 3,024,611 $ 3,027 $ (23,871 ) $ 3,003,767 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,168,095 $ 4,841 $ (16,346 ) $ 1,156,590 Commercial 37,739 336 — 38,075 Asset-backed securities 2,897,728 3,302 (38,850 ) 2,862,180 $ 4,103,562 $ 8,479 $ (55,196 ) $ 4,056,845 December 31, 2018 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,237 $ 13 $ (35 ) $ 5,215 State and municipal securities 72,487 — (4,261 ) 68,226 Mortgage-backed securities: Agency 234,292 88 (3,972 ) 230,408 Commercial 74,411 4 (4,700 ) 69,715 Non-agency 1,245 — (26 ) 1,219 Corporate fixed income securities 958,406 — (26,802 ) 931,604 Asset-backed securities 1,779,496 672 (16,108 ) 1,764,060 $ 3,125,574 $ 777 $ (55,904 ) $ 3,070,447 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,198,442 $ 1,307 $ (31,689 ) $ 1,168,060 Commercial 51,524 185 — 51,709 Asset-backed securities 2,968,888 4,585 (70,335 ) 2,903,138 $ 4,218,854 $ 6,077 $ (102,024 ) $ 4,122,907 (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. There were no sales of available-for-sale securities during the three months ended March 31, 2019 and 2018. During the three months ended March 31, 2019, unrealized gains, net of deferred taxes, of $25.8 million were recorded in accumulated other comprehensive loss in the consolidated statements of financial condition. During the three months ended March 31, 2018, unrealized losses, net of deferred taxes, of $13.1 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 available-for-sale securities and held-to-maturity securities by contractual maturity. Expected maturities may differ significantly from contractual maturities, as issuers may have the right to call or prepay obligations with or without call or prepayment penalties. March 31, 2019 Available-for-sale securities Held-to-maturity securities Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Debt securities Within one year $ 2,520 $ 2,508 $ — $ — After one year through three years 268,305 265,943 — — After three years through five years 382,387 381,155 — — After five years through ten years 556,764 557,014 475,640 474,910 After ten years 1,522,383 1,509,205 2,422,088 2,387,270 Mortgage-backed securities After one year through three years 195 198 48,669 49,005 After three years through five years 1,106 1,119 — — After five years through ten years 5,492 5,607 160,488 159,315 After ten years 285,459 281,018 996,677 986,345 $ 3,024,611 $ 3,003,767 $ 4,103,562 $ 4,056,845 The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at March 31, 2019, are as follows ( in thousands Within 1 Year 1-5 Years 5-10 Years After 10 Years Total Available-for-sale: (1) U.S. government agency securities $ 1,910 $ 3,458 $ — $ — $ 5,368 State and municipal securities — — 18,171 30,947 49,118 Mortgage-backed securities: Agency — 1,317 5,607 208,493 215,417 Commercial — — — 71,377 71,377 Non-agency — — — 1,148 1,148 Corporate fixed income securities 598 643,640 303,350 — 947,588 Asset-backed securities — — 235,493 1,478,258 1,713,751 $ 2,508 $ 648,415 $ 562,621 $ 1,790,223 $ 3,003,767 Held-to-maturity: Mortgage-backed securities: Agency $ — $ 10,930 $ 160,488 $ 996,677 $ 1,168,095 Commercial — 37,739 — — 37,739 Asset-backed securities — — 475,640 2,422,088 2,897,728 $ — $ 48,669 $ 636,128 $ 3,418,765 $ 4,103,562 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis. At March 31, 2019 and December 31, 2018, securities of $1.6 billion and $1.9 billion, respectively, were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. At March 31, 2019 and December 31, 2018, securities of $1.5 billion and $1.6 billion, respectively, were pledged with the Federal Reserve discount window. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at March 31, 2019 (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 U.S. government securities $ (22 ) $ 3,173 $ — $ — $ (22 ) $ 3,173 Mortgage-backed securities: Agency (1 ) 150 (1,866 ) 83,461 (1,867 ) 83,611 Commercial — — (2,744 ) 70,628 (2,744 ) 70,628 Non-agency (28 ) 1,146 — — (28 ) 1,146 Corporate fixed income securities (106 ) 104,241 (5,310 ) 505,628 (5,416 ) 609,869 Asset-backed securities (13,794 ) 1,273,856 — — (13,794 ) 1,273,856 $ (13,951 ) $ 1,382,566 $ (9,920 ) $ 659,717 $ (23,871 ) $ 2,042,283 Held-to-maturity securities Mortgage-backed securities: Agency $ (39 ) $ 118,702 $ (16,307 ) $ 642,543 $ (16,346 ) $ 761,245 Asset-backed securities (31,877 ) 2,111,245 (6,973 ) 229,646 (38,850 ) 2,340,891 $ (31,916 ) $ 2,229,947 $ (23,280 ) $ 872,189 $ (55,196 ) $ 3,102,136 At March 31, 2019, the amortized cost of 186 securities classified as available for sale exceeded their fair value by $23.9 million, of which $9.9 million related to investment securities that had been in a loss position for 12 months or longer. The total fair value of these investments at March 31, 2019, was $2.0 billion, which was 68.0% of our available-for-sale portfolio. At March 31, 2019, the carrying value of 163 securities held to maturity exceeded their fair value by $55.2 million, of which $23.3 million related to securities held to maturity that have been in a loss position for 12 months or longer. As discussed in more detail below, we conduct periodic reviews of all securities with unrealized losses to assess whether the impairment is other-than-temporary. Other-Than-Temporary Impairment We evaluate all securities in an unrealized loss position quarterly to assess whether the impairment is other-than-temporary. Our other-than-temporary impairment (“OTTI”) assessment is a subjective process requiring the use of judgments and assumptions. There was no credit-related OTTI recognized during the three months ended March 31, 2019 and 2018. We believe the gross unrealized losses of $79.1 million related to our investment portfolio, as of March 31, 2019, are attributable to issuer-specific credit spreads and changes in market interest rates and asset spreads. We, therefore, do not expect to incur any credit losses related to these securities. In addition, we have no intent to sell these securities with unrealized losses, and it is not more likely than not that we will be required to sell these securities prior to recovery of the amortized cost. Accordingly, we have concluded that the impairment on these securities is not other-than-temporary.

Bank Loans

Bank Loans	3 Months Ended
	Mar. 31, 2019
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 includes consumer, credit card, and indirect lending. The following table presents the balance and associated percentage of each major loan category in our bank loan portfolio at March 31, 2019 and December 31, 2018 (in thousands, except percentages) March 31, 2019 December 31, 2018 Balance Percent Balance Percent Commercial and industrial $ 3,314,564 37.6 % $ 3,304,234 38.5 % Residential real estate 2,928,228 33.2 2,875,014 33.5 Securities-based loans 1,860,989 21.1 1,786,966 20.8 Commercial real estate 361,950 4.1 318,961 3.7 Construction and land 175,023 2.0 138,245 1.6 Home equity lines of credit 44,235 0.5 38,098 0.4 Other 124,095 1.5 120,129 1.5 Gross bank loans 8,809,084 100.0 % 8,581,647 100.0 % Unamortized loan discount, net (10,624 ) (12,155 ) Loans in process (5,075 ) 27,984 Unamortized loan fees, net 1,476 5,972 Allowance for loan losses (88,172 ) (85,833 ) Bank loans, net $ 8,706,689 $ 8,517,615 At March 31, 2019 and December 31, 2018, Stifel Bancorp had loans outstanding to its executive officers, directors, and their affiliates in the amount of $3.2 million and $4.0 million, respectively, and loans outstanding to other Stifel Financial Corp. executive officers, directors, and their affiliates in the amount of $19.5 million and $24.8 million, respectively. At March 31, 2019 and December 31, 2018, we had loans held for sale of $144.2 million and $205.6 million, respectively. For the three months ended March 31, 2019 and 2018, we recognized gains of $0.9 million and $2.5 million, respectively, from the sale of originated loans, net of fees and costs. The following table details activity in the allowance for loan losses by portfolio segment for the three months ended March 31, 2019 (in thousands) Three Months Ended March 31, 2019 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 68,367 $ 211 $ (12 ) $ — $ 68,566 Residential real estate 11,228 270 — 87 11,585 Securities-based loans 1,978 249 — — 2,227 Commercial real estate 1,778 643 — — 2,421 Construction and land 1,241 483 — — 1,724 Home equity lines of credit 310 61 — 1 372 Other 88 78 (44 ) 24 146 Qualitative 843 288 — — 1,131 $ 85,833 $ 2,283 $ (56 ) $ 112 $ 88,172 The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at March 31, 2019 (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 $ 8,677 $ 59,889 $ 68,566 $ 23,654 $ 3,290,910 $ 3,314,564 Residential real estate 24 11,561 11,585 619 2,927,609 2,928,228 Securities-based loans — 2,227 2,227 — 1,860,989 1,860,989 Commercial real estate — 2,421 2,421 — 361,950 361,950 Construction and land — 1,724 1,724 — 175,023 175,023 Home equity lines of credit — 372 372 184 44,051 44,235 Other 24 122 146 196 123,899 124,095 Qualitative — 1,131 1,131 — — — $ 8,725 $ 79,447 $ 88,172 $ 24,653 $ 8,784,431 $ 8,809,084 The following table details activity in the allowance for loan losses by portfolio segment for the three months ended March 31, 2018 (in thousands) Three Months Ended March 31, 2018 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 54,474 $ 1,971 $ (12 ) $ — $ 56,433 Residential real estate 8,430 349 — — 8,779 Securities-based loans 2,088 (194 ) — — 1,894 Commercial real estate 1,520 (200 ) — — 1,320 Home equity lines of credit 162 1 — 1 164 Construction and land 100 99 — — 199 Other 16 — (2 ) 1 15 Qualitative 676 17 — — 693 $ 67,466 $ 2,043 $ (14 ) $ 2 $ 69,497 The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at December 31, 2018 (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 $ 8,678 $ 59,689 $ 68,367 $ 23,677 $ 3,280,557 $ 3,304,234 Residential real estate 24 11,204 11,228 519 2,874,495 2,875,014 Securities-based loans — 1,978 1,978 — 1,786,966 1,786,966 Commercial real estate — 1,778 1,778 — 318,961 318,961 Construction and land — 1,241 1,241 — 138,245 138,245 Home equity lines of credit — 310 310 184 37,914 38,098 Other 1 87 88 21 120,108 120,129 Qualitative — 843 843 — — — $ 8,703 $ 77,130 $ 85,833 $ 24,401 $ 8,557,246 $ 8,581,647 In determining the amount of our allowance, we rely on an analysis of our loan portfolio, our experience, and our evaluation of general economic conditions. If our assumptions prove to be incorrect, our current allowance may not be sufficient to cover future loan losses and we may experience significant increases to our provision. There are two components of the allowance for loan losses: the inherent allowance component and the specific allowance component. The inherent allowance component of the allowance for loan losses is used to estimate the probable losses inherent in the loan portfolio and includes non-homogeneous loans that have not been identified as impaired and portfolios of smaller balance homogeneous loans. The Company maintains methodologies by loan product for calculating an allowance for loan losses that estimates the inherent losses in the loan portfolio. Qualitative and environmental factors such as economic and business conditions, nature and volume of the portfolio and lending terms, and volume and severity of past due loans may also be considered in the calculations. The allowance for loan losses is maintained at a level reasonable to ensure that it can adequately absorb the estimated probable losses inherent in the portfolio. The specific allowance component of the allowance for loan losses is used to estimate probable losses for non-homogeneous exposures, including loans modified in a troubled debt restructuring, which have been specifically identified for impairment analysis by the Company and determined to be impaired. At March 31, 2019, we had $24.7 million of impaired loans, net of discounts, which included $9.1 million in troubled debt restructurings. The specific allowance on impaired loans at March 31, 2019 was $8.7 million. At December 31, 2018, we had $24.4 million of impaired loans, net of discounts, which included $9.1 million in troubled debt restructurings. The specific allowance on impaired loans at December 31, 2018 was $8.7 million. The gross interest income related to impaired loans, which would have been recorded, had these loans been current in accordance with their original terms, and the interest income recognized on these loans during the three months ended March 31, 2019 and 2018, were insignificant to the consolidated financial statements. The tables below present loans that were individually evaluated for impairment by portfolio segment at March 31, 2019 and December 31, 2018, including the average recorded investment balance for the year to date period presented (in thousands) March 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 $ 23,654 $ 220 $ 23,434 $ 23,654 $ 8,677 $ 23,821 Residential real estate 677 452 167 619 24 630 Home equity lines of credit 184 184 — 184 — 184 Other 345 — 196 196 24 233 Total $ 24,860 $ 856 $ 23,797 $ 24,653 $ 8,725 $ 24,868 December 31, 2018 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 23,677 $ 242 $ 23,435 $ 23,677 $ 8,678 $ 23,807 Residential real estate 544 352 167 519 24 275 Home equity lines of credit 184 184 — 184 — 184 Other 694 11 10 21 1 70 Total $ 25,099 $ 789 $ 23,612 $ 24,401 $ 8,703 $ 24,336 The following table presents the aging of the recorded investment in past due loans at March 31, 2019 and December 31, 2018 by portfolio segment (in thousands) As of March 31, 2019 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Commercial and industrial $ — $ 14,644 $ 14,644 $ 3,299,920 $ 3,314,564 Residential real estate 5,944 227 6,171 2,922,057 2,928,228 Securities-based loans — — — 1,860,989 1,860,989 Commercial real estate — — — 361,950 361,950 Construction and land — — — 175,023 175,023 Home equity lines of credit — — — 44,235 44,235 Other 45 65 110 123,985 124,095 Total $ 5,989 $ 14,936 $ 20,925 $ 8,788,159 $ 8,809,084 As of March 31, 2019* Non-Accrual Restructured Total Commercial and industrial $ 14,718 $ 8,936 $ 23,654 Residential real estate 452 167 619 Home equity lines of credit 184 — 184 Other 196 — 196 Total $ 15,550 $ 9,103 $ 24,653 * There were no loans past due 90 days and still accruing interest at March 31, 2019. As of December 31, 2018 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ — $ 14,656 $ 14,656 $ 3,289,578 $ 3,304,234 Residential real estate 6,970 377 7,347 2,867,667 2,875,014 Securities-based loans — — — 1,786,966 1,786,966 Commercial real estate — — — 318,961 318,961 Construction and land — — — 138,245 138,245 Home equity lines of credit 33 — 33 38,065 38,098 Other — 134 134 119,995 120,129 Total $ 7,003 $ 15,167 $ 22,170 $ 8,559,477 $ 8,581,647 As of December 31, 2018* Non-Accrual Restructured Total Commercial and industrial $ 14,741 $ 8,936 $ 23,677 Residential real estate 352 167 519 Home equity lines of credit 184 — 184 Other 21 — 21 Total $ 15,298 $ 9,103 $ 24,401 * There were no loans past due 90 days and still accruing interest at December 31, 2018. Credit quality indicators Loans meet the definition of Pass when they are performing and do not demonstrate adverse characteristics that are likely to result in a credit loss. A loan is determined to be impaired when principal or interest becomes 90 days past due or when collection becomes uncertain. At the time a loan is determined to be impaired, the accrual of interest and amortization of deferred loan origination fees is discontinued (“non-accrual status”), and any accrued and unpaid interest income is reversed. We closely monitor economic conditions and loan performance trends to manage and evaluate our exposure to credit risk. Trends in delinquency ratios are an indicator, among other considerations, of credit risk within our loan portfolio. The level of nonperforming assets represents another indicator of the potential for future credit losses. Accordingly, key metrics we track and use in evaluating the credit quality of our loan portfolio include delinquency and nonperforming asset rates, as well as charge-off rates and our internal risk ratings of the loan portfolio. In general, we are a secured lender. At March 31, 2019 and December 31, 2018, 98.5% and 98.4% of our loan portfolio was collateralized, respectively. Collateral is required in accordance with the normal credit evaluation process based upon the creditworthiness of the customer and the credit risk associated with the particular transaction. The Company uses the following definitions for risk ratings: Pass. A credit exposure rated pass has a continued expectation of timely repayment, all obligations of the borrower are current, and the obligor complies with material terms and conditions of the lending agreement. Special Mention. Extensions of credit that have potential weakness that deserve management’s close attention, and if left uncorrected may, at some future date, result in the deterioration of the repayment prospects or collateral position. Substandard. Obligor has a well-defined weakness that jeopardizes the repayment of the debt and has a high probability of payment default with the distinct possibility that the Company will sustain some loss if noted deficiencies are not corrected. Doubtful. Inherent weakness in the exposure makes the collection or repayment in full, based on existing facts, conditions and circumstances, highly improbable, and the amount of loss is uncertain. Substandard loans are regularly reviewed for impairment. Doubtful loans are considered impaired. When a loan is impaired the impairment is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, or as a practical expedient, the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent. Based on the most recent analysis performed, the risk category of our loan portfolio was as follows: (in thousands) As of March 31, 2019 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,265,303 $ 22,281 $ 26,980 $ — $ 3,314,564 Residential real estate 2,927,609 — 619 — 2,928,228 Securities-based loans 1,860,989 — — — 1,860,989 Commercial real estate 361,950 — — — 361,950 Construction and land 175,023 — — — 175,023 Home equity lines of credit 44,051 — 184 — 44,235 Other 123,677 222 — 196 124,095 Total $ 8,758,602 $ 22,503 $ 27,783 $ 196 $ 8,809,084 As of December 31, 2018 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,254,698 $ 34,795 $ 14,741 $ — $ 3,304,234 Residential real estate 2,874,495 — 519 — 2,875,014 Securities-based loans 1,786,966 — — — 1,786,966 Commercial real estate 318,961 — — — 318,961 Construction and land 138,245 — — — 138,245 Home equity lines of credit 37,914 — 184 — 38,098 Other 119,912 196 — 21 120,129 Total $ 8,531,191 $ 34,991 $ 15,444 $ 21 $ 8,581,647

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2019
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, 2018 Adjustments Write-off March 31, 2019 Goodwill Global Wealth Management $ 340,395 $ 6,998 $ — $ 347,393 Institutional Group 694,284 14,434 — 708,718 $ 1,034,679 $ 21,432 $ — $ 1,056,111 December 31, 2018 Net Additions Amortization March 31, 2019 Intangible assets Global Wealth Management $ 60,532 $ — $ (1,847 ) $ 58,685 Institutional Group 59,123 7,768 (1,746 ) 65,145 $ 119,655 $ 7,768 $ (3,593 ) $ 123,830 On January 2, 2019, the Company completed the acquisition of First Empire. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $22.1 million of goodwill and intangible assets in the consolidated statement of financial condition, which has been allocated to our company’s Institutional Group segment. The allocation of the purchase price of First Empire is preliminary and will be finalized upon completion of the analysis of the fair values of the net assets of First Empire as of the acquisition date 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. See Note 1 in the notes to our consolidated financial statements for additional information regarding the acquisition of First Empire. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the First Empire business, its employees and customer base. Goodwill is expected to be deductible for federal income tax purposes. The adjustments to goodwill included in our Global Wealth Management segment during the three months ended March 31, 2019 are primarily attributable to the Business Bank acquisition, which closed on August 31, 2018. 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 subject to amortization as of March 31, 2019 and December 31, 2018 were as follows (in thousands) March 31, 2019 December 31, 2018 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 160,819 $ 67,661 $ 160,745 $ 65,254 Trade name 26,831 12,136 26,831 11,755 Core deposits 8,615 1,384 8,615 816 Non-compete agreements 2,714 1,674 2,603 1,452 Investment banking backlog 1,445 1,311 1,431 1,293 Estimated First Empire intangibles (1) 7,700 128 — — $ 208,124 $ 84,294 $ 200,225 $ 80,570 (1) Amortization expense related to intangible assets was $3.6 million and $2.7 million for the three months ended March 31, 2019 and 2018, respectively. The weighted-average remaining lives of the following intangible assets at March 31, 2019, are: customer relationships, 10.0 years; trade name, 9.4 years; core deposits, 4.8 years; non-compete agreements, 9.6 years; and First Empire intangibles, 14.8 years. We have an intangible asset that is not subject to amortization and is, therefore, not included in the table below. As of March 31, 2019, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2019 $ 10,577 2020 13,586 2021 12,732 2022 11,916 2023 11,249 Thereafter 61,652 $ 121,712

Borrowings and Federal Home Loa

Borrowings and Federal Home Loan Bank Advances	3 Months Ended
	Mar. 31, 2019
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, 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. Our uncommitted secured lines of credit at March 31, 2019, totaled $1.0 billion 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 $276.0 million during the three months ended March 31, 2019. There are no compensating balance requirements under these arrangements. Any borrowings on secured lines of credit are day-to-day and are generally utilized to finance certain fixed income securities. At March 31, 2019, borrowings on our uncommitted secured lines of credit of $276.0 million, included in borrowings in the consolidated statements of financial condition, were collateralized by company-owned securities valued at $309.7 million. The Federal Home Loan advances of $250.0 million as of March 31, 2019 are floating-rate advances. The weighted average interest rates on these advances during the three months ended March 31, 2019 was 1.45%. 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. Our committed bank line financing at March 31, 2019, 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 plus 2.00%, as defined in the revolving credit facility. At March 31, 2019, 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 2019 in which the lenders are a number of financial institutions. This committed unsecured borrowing facility provides for maximum borrowings of up to $250.0 million at variable rates of interest. At March 31, 2019, we had no advances on the Stifel Credit Facility and were in compliance with all covenants. A subsidiary of Stifel Bancorp is a party to two Notes that mature in 2043. The Notes bear interest contractually at fixed rates as per the Note Purchase Agreement. The outstanding balance on the Notes at March 31, 2019 was $122.8 million and is included in borrowings in the consolidated statements of financial condition.

Senior Notes

Senior Notes	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Senior Notes	NOTE 10 – Senior Notes The following table summarizes our senior notes as of March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 December 31, 2018 4.250% 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 1,025,000 1,025,000 Debt issuance costs, net (8,884 ) (9,027 ) Senior notes, net $ 1,016,116 $ 1,015,973 (1) In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.250% senior notes due July 2024. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. In July 2016, we issued an additional $200.0 million in aggregate principal amount of 4.25% senior notes due 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. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. (3) Our senior notes mature as follows, based upon contractual terms (in thousands) 2019 $ — 2020 300,000 2021 — 2022 — 2023 — Thereafter 725,000 $ 1,025,000

Bank Deposits

Bank Deposits	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 and December 31, 2018 were as follows (in thousands) March 31, 2019 December 31, 2018 Money market and savings accounts $ 13,354,624 $ 13,609,612 Certificates of deposit 1,174,386 1,763,336 Demand deposits (interest-bearing) 420,712 392,765 Demand deposits (non-interest-bearing) 100,155 97,900 $ 15,049,877 $ 15,863,613 The weighted-average interest rate on deposits was 0.73% and 0.60% at March 31, 2019 and December 31, 2018, respectively. Scheduled maturities of certificates of deposit at March 31, 2019 and December 31, 2018 were as follows (in thousands) March 31, 2019 December 31, 2018 Certificates of deposit, less than $100,000: Within one year $ 4,974 $ 4,858 One to three years 480 623 Three to five years 81 140 $ 5,535 $ 5,621 Certificates of deposit, $100,000 and greater: Within one year $ 1,002,302 $ 1,535,784 One to three years 142,802 195,159 Three to five years 23,747 26,772 1,168,851 1,757,715 $ 1,174,386 $ 1,763,336 At March 31, 2019 and December 31, 2018, the amount of deposits includes related party deposits, primarily interest-bearing and time deposits of executive officers, directors, and their affiliates of $7.0 million and $6.5 million, respectively. Brokerage customers’ deposits were $14.1 billion and $15.2 billion, respectively.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	3 Months Ended
	Mar. 31, 2019
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Derivative Instruments And Hedging Activities	NOTE 12 – Derivative Instruments and Hedging Activities We use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps generally involve the exchange of fixed and variable rate interest payments between two parties, based on a common notional principal amount and maturity date with no exchange of underlying principal amounts. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for our company making fixed payments. Our policy is not to offset fair value amounts recognized for derivative instruments and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from derivative instruments recognized at fair value executed with the same counterparty under master netting arrangements. The following table provides the notional values and fair values of our derivative instruments designated as hedging instruments as of March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 Notional Balance Location Fair Value Derivative Assets Cash flow interest rate contracts $ 250,000 Other assets $ 4,896 December 31, 2018 Notional Value Balance Location Fair Value Derivative Assets Cash flow interest rate contracts $ 540,000 Other assets $ 7,683 Cash Flow Hedges We have entered into interest rate swap agreements that effectively modify our exposure to interest rate risk by converting floating rate debt to a fixed rate debt. The swaps have an average remaining life of 1.8 years. Any unrealized gains or losses related to cash flow hedging instruments are reclassified from accumulated other comprehensive loss into earnings in the same period the hedged forecasted transaction affects earnings and are recorded in interest expense in the accompanying consolidated statements of operations. The ineffective portion of the cash flow hedging instruments is recorded in other income or other operating expense. Amounts reported in accumulated other comprehensive loss related to derivatives will be reclassified to interest expense as interest payments are made on our variable rate deposits. During the next twelve months, we estimate that $2.7 million will be reclassified as interest income. The following table shows the effect of our company’s derivative instruments in the consolidated statements of operations for the three months ended March 31, 2019 and 2018 (in thousands) Gain/(Loss) Recognized in OCI Gain Reclassified From OCI Into Income Three Months Ended March 31, Three Months Ended March 31, 2019 2018 2019 2018 Cash flow interest rate contracts $ 925 $ (3,818 ) $ 1,542 $ 533 We maintain a risk management strategy that incorporates the use of derivative instruments to minimize significant unplanned fluctuations in earnings caused by interest rate volatility. Our goal is to manage sensitivity to changes in rates by hedging the maturity characteristics of variable rate affiliated deposits, thereby limiting the impact on earnings. By using derivative instruments, we are exposed to credit and market risk on those derivative positions. We manage the market risk associated with interest rate contracts by establishing and monitoring limits as to the types and degree of risk that may be undertaken. Credit risk is equal to the extent of the fair value gain in a derivative if the counterparty fails to perform. When the fair value of a derivative contract is positive, this generally indicates that the counterparty owes our company and, therefore, creates a repayment risk for our company. When the fair value of a derivative contract is negative, we owe the counterparty and, therefore, have no repayment risk. See Note 4 in the notes to our consolidated financial statements for further discussion on how we determine the fair value of our financial instruments. We minimize the credit (or repayment) risk in derivative instruments by entering into transactions with high-quality counterparties that are reviewed periodically by senior management. Credit Risk-Related Contingency Features We have agreements with our derivative counterparties containing provisions where if we default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then we could also be declared in default on our derivative obligations. We have agreements with certain of our derivative counterparties that contain provisions where if our shareholders’ equity declines below a specified threshold or if we fail to maintain a specified minimum shareholders’ equity, then we could be declared in default on our derivative obligations. Certain of our agreements with our derivative counterparties contain provisions where if a specified event or condition occurs that materially changes our creditworthiness in an adverse manner, we may be required to fully collateralize our obligations under the derivative instrument. Regulatory Capital-Related Contingency Features Certain of our derivative instruments contain provisions that require us to maintain our capital adequacy requirements. If we were to lose our status as “adequately capitalized,” we would be in violation of those provisions, and the counterparties of the derivative instruments could request immediate payment or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. Counterparty Risk In the event of counterparty default, our economic loss may be higher than the uncollateralized exposure of our derivatives if we were not able to replace the defaulted derivatives in a timely fashion. We monitor the risk that our uncollateralized exposure to each of our counterparties for interest rate swaps will increase under certain adverse market conditions by performing periodic market stress tests. These tests evaluate the potential additional uncollateralized exposure we would have to each of these derivative counterparties assuming changes in the level of market rates over a brief time period.

Disclosures About Offsetting As

Disclosures About Offsetting Assets And Liabilities	3 Months Ended
	Mar. 31, 2019
Offsetting [Abstract]
Disclosures About Offsetting Assets And Liabilities	NOTE 13 – Disclosures About Offsetting Assets and Liabilities The following table provides information about financial assets and derivative assets that are subject to offset as of March 31, 2019 and December 31, 2018 (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 March 31, 2019: Securities borrowing (1) $ 115,223 $ — $ 115,223 $ (64,520 ) $ (47,133 ) $ 3,570 Reverse repurchase agreements (2) 568,034 — 568,034 (28,740 ) (539,121 ) 173 Cash flow interest rate contracts 4,896 — 4,896 — — 4,896 $ 688,153 $ — $ 688,153 $ (93,260 ) $ (586,254 ) $ 8,639 As of December 31, 2018: Securities borrowing (1) $ 109,795 $ — $ 109,795 $ (57,328 ) $ (45,005 ) $ 7,462 Reverse repurchase agreements (2) 699,900 — 699,900 (365,822 ) (329,740 ) 4,338 Cash flow interest rate contracts 7,683 — 7,683 — — 7,683 $ 817,378 $ — $ 817,378 $ (423,150 ) $ (374,745 ) $ 19,483 (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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, respectively. The following table provides information about financial liabilities that are subject to offset as of March 31, 2019 and December 31, 2018 (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 March 31, 2019: Securities lending (3) $ (525,115 ) $ — $ (525,115 ) $ 64,520 $ 460,594 $ (1 ) Repurchase agreements (4) (466,284 ) — (466,284 ) 28,740 437,544 — $ (991,399 ) $ — $ (991,399 ) $ 93,260 $ 898,138 $ (1 ) As of December 31, 2018: Securities lending (3) $ (392,163 ) $ — $ (392,163 ) $ 57,328 $ 325,110 $ (9,725 ) Repurchase agreements (4) (535,394 ) — (535,394 ) 365,822 169,572 — $ (927,557 ) $ — $ (927,557 ) $ 423,150 $ 494,682 $ (9,725 ) (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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, respectively.

Commitments, Guarantees, And Co

Commitments, Guarantees, And Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments, Guarantees, And Contingencies	NOTE 14 – Commitments, Guarantees, and Contingencies Broker-Dealer Commitments and Guarantees In the normal course of business, we enter into underwriting commitments. Settlement of transactions relating to such underwriting commitments, which were open at March 31, 2019, had no material effect on the consolidated financial statements. 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 21 in the notes to consolidated financial statements for further details. Concentration of Credit Risk We provide investment, capital raising, and related services to a diverse group of domestic customers, including governments, corporations, and institutional and individual investors. Our exposure to credit risk associated with the non-performance of customers in fulfilling their contractual obligations pursuant to securities transactions can be directly impacted by volatile securities markets, credit markets, and regulatory changes. This exposure is measured on an individual customer basis and on a group basis for customers that share similar attributes. To reduce the potential for risk concentrations, counterparty credit limits have been implemented for certain products and are continually monitored in light of changing customer and market conditions. As of March 31, 2019, we did not have significant concentrations of credit risk with any one customer or counterparty, or any group of customers or counterparties.

Legal Proceedings

Legal Proceedings	3 Months Ended
	Mar. 31, 2019
Loss Contingency Information About Litigation Matters [Abstract]
Legal Proceedings	NOTE 15 – 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, 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.

Regulatory Capital Requirements

Regulatory Capital Requirements	3 Months Ended
	Mar. 31, 2019
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	NOTE 16 – Regulatory Capital Requirements We operate in a highly regulated environment and are subject to capital requirements, which may limit distributions to our company from its subsidiaries. Distributions from our broker-dealer subsidiaries are subject to net capital rules. A broker-dealer that fails to comply with the SEC’s Uniform Net Capital Rule (Rule 15c3-1) may be subject to disciplinary actions by the SEC and self-regulatory organizations, such as FINRA, including censures, fines, suspension, or expulsion. Stifel has chosen to calculate its net capital under the alternative method, which prescribes that their net capital shall not be less than the greater of $1.0 million or two percent of aggregate debit balances (primarily receivables from customers) computed in accordance with the SEC’s Customer Protection Rule (Rule 15c3-3). Our other broker-dealer subsidiaries calculate their net capital under the aggregate indebtedness method, whereby their aggregate indebtedness may not be greater than fifteen times their net capital (as defined). At March 31, 2019, Stifel had net capital of $371.5 million, which was 22.5% of aggregate debit items and $338.4 million in excess of its minimum required net capital. At March 31, 2019, all of our other broker-dealer subsidiaries’ net capital exceeded the minimum net capital required under the SEC rule. Our international subsidiary is subject to the regulatory supervision and requirements of the Financial Conduct Authority (“FCA”) in the United Kingdom. At March 31, 2019, our international subsidiary’s capital and reserves were in excess of the financial resources requirement under the rules of the FCA. Our company, as a bank holding company, Stifel Bank & Trust, and Stifel Bank (“bank subsidiaries”) are subject to various regulatory capital requirements administered by 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 its bank subsidiaries’ financial results. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, our company and its bank 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 bank 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 bank subsidiaries. Our company and its bank subsidiaries are required to maintain minimum amounts and ratios of Total and Tier 1 capital (as defined) to risk-weighted assets (as defined). As well as, 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 bank 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 bank 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 bank subsidiaries must maintain total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the tables below (in thousands, except ratios). Stifel Financial Corp. – Federal Reserve Capital Amounts March 31, 2019 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,942,586 15.9 % $ 549,675 4.5 % $ 793,975 6.5 % Tier 1 capital 2,256,249 18.5 % 732,900 6.0 % 977,200 8.0 % Total capital 2,403,426 19.7 % 977,200 8.0 % 1,221,500 10.0 % Tier 1 leverage 2,256,249 9.8 % 919,050 4.0 % 1,148,812 5.0 % Stifel Bank & Trust – Federal Reserve Capital Amounts March 31, 2019 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,105,446 13.7 % $ 361,998 4.5 % $ 522,885 6.5 % Tier 1 capital 1,109,109 13.8 % 482,663 6.0 % 643,551 8.0 % Total capital 1,197,212 14.9 % 643,551 8.0 % 804,439 10.0 % Tier 1 leverage 1,109,109 7.1 % 624,945 4.0 % 781,182 5.0 % Stifel Bank – Federal Reserve Capital Amounts March 31, 2019 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 135,189 17.5 % $ 34,754 4.5 % $ 50,200 6.5 % Tier 1 capital 135,189 17.5 % 46,338 6.0 % 61,784 8.0 % Total capital 143,745 18.6 % 61,784 8.0 % 77,230 10.0 % Tier 1 leverage 135,189 7.5 % 72,561 4.0 % 90,702 5.0 %

Operating Leases

Operating Leases	3 Months Ended
	Mar. 31, 2019
Lessee Disclosure [Abstract]
Operating Leases	NOTE 17 – Operating Leases The table below presents information about operating lease liabilities as of March 31, 2019, (in thousands, except percentages) Remainder of 2019 $ 65,058 2020 84,120 2021 79,102 2022 78,288 2023 76,386 Thereafter 485,856 Total undiscounted lease payments 868,810 Imputed interest (198,035 ) Total operating lease liabilities $ 670,775 Weighted average remaining lease term 11.9 years Weighted average discount rate 4.58 % 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. Operating lease costs, included in occupancy and equipment rental in the consolidated statements of operations, were $21.0 million for the three months ended March 31, 2019 and $21.9 million for the three months ended March 31, 2018. As of March 31, 2019, the Company had a total lease portfolio of 29 aircraft engines with a net book value of $286.0 million, which is included in fixed assets, net in the consolidated statements of financial condition. As of March 31, 2019, minimum future payments under non-cancelable leases were (in thousands) Remainder of 2019 $ 25,478 2020 22,099 2021 18,012 2022 10,004 2023 4,889 Thereafter 10,420 $ 90,902 Lease income, included in other income in the consolidated statements of operations, was $8.2 million for the three months ended March 31, 2019.

Revenues from Contracts with Cu

Revenues from Contracts with Customers	3 Months Ended
	Mar. 31, 2019
Revenue From Contract With Customer [Abstract]
Revenues from Contracts with Customers	NOTE 18 – Revenues from Contracts with Customers The following table presents the Company’s total revenues broken out by revenues from contracts with customers and other sources of revenues for the three months ended March 31, 2019 (in thousands) Three Months Ended March 31, 2019 2018 Revenues from contracts with customers: Commissions $ 155,449 $ 165,775 Investment banking 161,840 176,362 Asset management and service fees 195,267 195,801 Other 3,782 3,718 Total revenue from contracts with customers 516,338 541,656 Other sources of revenue: Interest 191,071 137,734 Principal transactions 104,032 97,782 Other 8,427 (361 ) Total revenues $ 819,868 $ 776,811 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 revenues. 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 disaggregated by major business activity and primary geographic regions for the three months ended March 31, 2019 and 2018 (in thousands) Three Months Ended March 31, 2019 Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 109,927 $ 45,522 $ — $ 155,449 Capital raising (1) 8,223 48,722 — 56,945 Advisory fees (1) — 104,895 — 104,895 Investment banking 8,223 153,617 — 161,840 Asset management 195,253 14 — 195,267 Other 2,455 — 1,327 3,782 Total 315,858 199,153 1,327 516,338 Primary Geographic Region: United States 315,858 176,740 1,327 493,925 United Kingdom — 21,103 — 21,103 Other — 1,310 — 1,310 $ 315,858 $ 199,153 $ 1,327 $ 516,338 Three Months Ended March 31, 2018 Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 119,205 $ 46,570 $ — $ 165,775 Capital raising (1) 7,688 71,001 — 78,689 Advisory fees (1) — 97,673 — 97,673 Investment banking 7,688 168,674 — 176,362 Asset management 195,789 12 — 195,801 Other 2,686 — 1,032 3,718 Total 325,368 215,256 1,032 541,656 Primary Geographic Region: United States 325,368 176,350 1,032 502,750 United Kingdom — 37,879 — 37,879 Other — 1,027 — 1,027 $ 325,368 $ 215,256 $ 1,032 $ 541,656 (1) See Note 22 for further break-out of revenues by geography. Information on Remaining Performance Obligations and Revenue Recognized from Past Performance We do not disclose information about remaining performance obligations pertaining to contracts that have an original expected duration of one year or less. The transaction price allocated to remaining unsatisfied or partially unsatisfied performance obligations with an original expected duration exceeding one year was not material at March 31, 2019. Investment banking advisory fees that are contingent upon completion of a specific milestone and fees associated with certain distribution services are also excluded as the fees are considered variable and not included in the transaction price at March 31, 2019. 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 $137.2 million and $116.7 million at March 31, 2019 and December 31, 2018, respectively. We had no significant impairments related to these receivables during the three months ended March 31, 2019. Our deferred revenue primarily relates to retainer fees received in investment banking advisory engagements and investment advisory fees where the performance obligation has not yet been satisfied. Deferred revenue at March 31, 2019 and December 31, 2018 was $17.6 million and $11.1 million, respectively.

Interest Income and Interest Ex

Interest Income and Interest Expense	3 Months Ended
	Mar. 31, 2019
Banking And Thrift Interest [Abstract]
Interest Income and Interest Expense	NOTE 19 – Interest Income and Interest Expense The components of interest income and interest expense are as follows (in thousands) Three Months Ended March 31, 2019 2018 Interest income: Bank loans, net $ 93,224 $ 63,635 Investment securities 65,466 54,903 Margin balances 13,440 10,950 Financial instruments owned 6,313 4,929 Other 12,628 3,317 $ 191,071 $ 137,734 Interest expense: Bank deposits $ 28,066 $ 8,130 Senior notes 11,122 11,118 Federal Home Loan Bank advances 1,678 3,252 Other 8,582 3,953 $ 49,448 $ 26,453

Employee Incentive, Deferred Co

Employee Incentive, Deferred Compensation, And Retirement Plans	3 Months Ended
	Mar. 31, 2019
Share Based Compensation Allocation And Classification In Financial Statements [Abstract]
Employee Incentive, Deferred Compensation, And Retirement Plans	NOTE 20 – 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 employees. 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 vesting period. 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 3.8 million shares at March 31, 2019. Stock-based compensation expense included in compensation and benefits expense in the consolidated statements of operations for our company’s incentive stock plan was $29.7 million and $23.9 million for the three months ended March 31, 2019 and 2018, respectively. Restricted Stock Units and Restricted Stock 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. 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. Any resulting delivery of shares for PRSUs granted as part of compensation will occur after four years for 80% of the earned award, and in the fifth year for the remaining 20% of the earned award. The number of shares converted has the potential to range from 0% to 200% based on how the Company performs during the performance period. Restricted stock awards are restricted as to sale or disposition. These restrictions lapse over the next one to five years. Compensation expense is amortized over the service period based on the fair value of the deferred award on the grant date. The Company’s pre-determined performance objectives must be met for the deferred awards to vest. Employees forfeit unvested deferred awards upon termination of employment with a corresponding reversal of compensation expense. Certain deferred awards may continue to vest under certain circumstances as described in the Plan. At March 31, 2019, the total number of restricted stock units, PRSUs, and restricted stock awards outstanding was 15.4 million, of which 13.3 million were unvested. At March 31, 2019, there was unrecognized compensation cost for deferred awards of approximately $485.4 million, which is expected to be recognized over a weighted-average period of 2.9 years. Deferred Compensation Plans The Plan is provided to certain revenue producers, officers, and key administrative employees, 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 period and are distributable upon vesting or at future specified dates. Deferred compensation costs are amortized on a straight-line basis over the vesting period. Elective deferrals are 100% vested. 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 with a 25% matching contribution. 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 period. Deferred compensation costs are amortized on a straight-line basis over the deferral period. Profit Sharing Plan Eligible employees 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”). Employees are permitted within limitations imposed by tax law to make pre-tax contributions to the 401(k) Plan. We may match certain employee contributions or make additional contributions to the 401(k) Plan at our discretion. Our contributions to the 401(k) Plan were $3.4 million and $0.4 million for the three months ended March 31, 2019 and 2018, respectively.

Off-Balance Sheet Credit Risk

Off-Balance Sheet Credit Risk	3 Months Ended
	Mar. 31, 2019
Concentration Risks Types No Concentration Percentage [Abstract]
Off-Balance Sheet Credit Risk	NOTE 21 – Off-Balance Sheet Credit Risk In the normal course of business, we execute, settle, and finance customer and proprietary securities transactions. These activities expose our company to off-balance sheet risk in the event that customers or other parties fail to satisfy their obligations. In accordance with industry practice, securities transactions generally settle within two business days after trade date. Should a customer or broker fail to deliver cash or securities as agreed, we may be required to purchase or sell securities at unfavorable market prices. We borrow and lend securities to facilitate the settlement process and finance transactions, utilizing customer margin securities held as collateral. We monitor the adequacy of collateral levels on a daily basis. We periodically borrow from banks on a collateralized basis, utilizing firm and customer margin securities in compliance with SEC rules. Should the counterparty fail to return customer securities pledged, we are subject to the risk of acquiring the securities at prevailing market prices in order to satisfy our customer obligations. We control our exposure to credit risk by continually monitoring our counterparties’ positions, and where deemed necessary, we may require a deposit of additional collateral and/or a reduction or diversification of positions. Our company sells securities it does not currently own (short sales) and is obligated to subsequently purchase such securities at prevailing market prices. We are exposed to risk of loss if securities prices increase prior to closing the transactions. We control our exposure to price risk from short sales through daily review and setting position and trading limits. We manage our risks associated with the aforementioned transactions through position and credit limits and the continuous monitoring of collateral. Additional collateral is required from customers and other counterparties when appropriate. We have accepted collateral in connection with resale agreements, securities borrowed transactions, and customer margin loans. Under many agreements, we are permitted to sell or repledge these securities held as collateral and use these securities to enter into securities lending arrangements or to deliver to counterparties to cover short positions. At March 31, 2019 and December 31, 2018, the fair value of securities accepted as collateral where we are permitted to sell or repledge the securities was $2.5 billion and $2.4 billion, respectively, and the fair value of the collateral that had been sold or repledged was $466.3 million and $535.4 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. For a complete discussion of our activities related to derivative instruments, see Note 12 in the notes to consolidated financial statements. In the ordinary course of business, Stifel Bancorp has commitments to originate loans, standby letters of credit, and lines of credit. Commitments to originate loans are agreements to lend to a customer as long as there is no violation of any condition established by the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash commitments. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if necessary, is based on the credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, commercial real estate, and residential real estate. At March 31, 2019 and December 31, 2018, Stifel Bancorp had outstanding commitments to originate loans aggregating $245.9 million and $146.7 million, respectively. The commitments extended over varying periods of time, with all commitments at March 31, 2019, scheduled to be disbursed in the following three months. Through Stifel Bancorp, in the normal course of business, we originate residential mortgage loans and sell them to investors. We may be required to repurchase mortgage loans that have been sold to investors in the event there are breaches of certain representations and warranties contained within the sales agreements. We may be required to repurchase mortgage loans that were sold to investors in the event that there was inadequate underwriting or fraud, or in the event that the loans become delinquent shortly after they are originated. We also may be required to indemnify certain purchasers and others against losses they incur in the event of breaches of representations and warranties and in various other circumstances, and the amount of such losses could exceed the repurchase amount of the related loans. Consequently, we may be exposed to credit risk associated with sold loans. Standby letters of credit are irrevocable conditional commitments issued by Stifel Bancorp to guarantee the performance of a customer to a third party. Financial standby letters of credit are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing, and similar transactions. Performance standby letters of credit are issued to guarantee performance of certain customers under non-financial contractual obligations. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loans to customers. Should Stifel Bancorp be obligated to perform under the standby letters of credit, it may seek recourse from the customer for reimbursement of amounts paid. At March 31, 2019 and December 31, 2018, Stifel Bancorp had outstanding letters of credit totaling $26.2 million and $26.3 million, respectively. A majority of the standby letters of credit commitments at March 31, 2019, have expiration terms that are less than one year. Lines of credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Lines of credit generally have fixed expiration dates. Stifel Bancorp uses the same credit policies in granting lines of credit as it does for on-balance sheet instruments. At March 31, 2019 and December 31, 2018, Stifel Bancorp had granted unused lines of credit to commercial and consumer borrowers aggregating $955.5 million and $919.5 million, respectively.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Reporting	NOTE 22 – 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 broker-dealer subsidiaries and to the general public. The Institutional Group segment includes institutional sales and trading. It provides securities brokerage, trading, and research services to institutions, with an emphasis on the sale of equity and fixed income products. This segment also includes the management of and participation in underwritings for both corporate and public finance (exclusive of sales credits generated through the private client group, which are included in the Global Wealth Management segment), merger and acquisition, and financial advisory services. The Other segment includes interest income from stock borrow activities, unallocated interest expense, interest income and gains and losses from investments held, amortization of stock-based awards, and all unallocated overhead cost associated with the execution of orders; processing of securities transactions; custody of client securities; receipt, identification, and delivery of funds and securities; compliance with regulatory and legal requirements; internal financial accounting and controls; and general administration and acquisition charges. Information concerning operations in these segments of business for the three months ended March 31, 2019 and 2018 is as follows (in thousands) Three Months Ended March 31, 2019 2018 Net revenues: (1) Global Wealth Management $ 510,610 $ 485,575 Institutional Group 261,286 270,078 Other (1,476 ) (5,295 ) $ 770,420 $ 750,358 Income/(loss) before income taxes: Global Wealth Management $ 194,490 $ 176,771 Institutional Group 32,204 44,570 Other (88,885 ) (101,787 ) $ 137,809 $ 119,554 (1) No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2019 or 2018. The following table presents our company’s total assets on a segment basis at March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 December 31, 2018 Global Wealth Management $ 20,350,939 $ 21,040,224 Institutional Group 3,567,420 3,238,617 Other 265,200 240,757 $ 24,183,559 $ 24,519,598 We have operations in the United States, United Kingdom, and Europe. The Company’s foreign operations are conducted through its wholly owned subsidiary, SNEL. Substantially all long-lived assets are located in the United States. Revenues, classified by the major geographic areas in which they are earned for the three months ended March 31, 2019 and 2018, were as follows (in thousands) Three Months Ended March 31, 2019 2018 United States $ 741,230 $ 706,068 United Kingdom 26,390 41,558 Other 2,800 2,732 $ 770,420 $ 750,358

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Basic EPS is computed by dividing earnings available to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. Diluted earnings per share include dilutive stock options and stock units under the treasury stock method. The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2019 and 2018 (in thousands, except per share data) Three Months Ended March 31, 2019 2018 Net income applicable to Stifel Financial Corp. $ 99,207 $ 88,761 Preferred dividends 2,344 2,344 Net income available to common shareholders $ 96,863 $ 86,417 Shares for basic and diluted calculation: Average shares used in basic computation 71,700 71,999 Dilutive effect of stock options and units (1) 7,510 9,790 Average shares used in diluted computation 79,210 81,789 Earnings per common share: Basic $ 1.35 $ 1.20 Diluted $ 1.22 $ 1.06 (1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. For the three months ended March 31, 2019 and 2018, the anti-dilutive effect from restricted stock units was immaterial. Cash Dividends During the three months ended March 31, 2019, we declared and paid a cash dividend of $0.15 per common share. During the three months ended March 31, 2018, we declared and paid a cash dividend of $0.12 per common share.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Shareholders' Equity	NOTE 24 – Shareholders’ Equity Share Repurchase Program We have an ongoing authorization from the Board of Directors to repurchase our common stock in the open market or in negotiated transactions. At March 31, 2019, the maximum number of shares that may yet be purchased under this plan was 8.0 million. The repurchase program has no expiration date. These purchases may be made on the open market or in privately negotiated transactions, depending upon market conditions and other factors. Repurchased shares may be used to meet obligations under our employee benefit plans and for general corporate purposes. During the three months ended March 31, 2019, we repurchased $53.9 million using existing Board authorizations at an average price of $53.25. During the three months ended March 31, 2018, we repurchased $2.8 million using existing Board authorizations at an average price of $56.78. Issuance of Common Stock During the three months ended March 31, 2019, we issued 1.2 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 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, we 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 or following a regulatory capital treatment event, as defined.

Variable Interest Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2019
Variable Interest Entity Not Primary Beneficiary Disclosures [Abstract]
Variable Interest Entities	NOTE 25 – 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 $233.1 million at March 31, 2019. For those funds where we act as the general partner, our company’s economic interest is generally limited to management fee arrangements as stipulated by the fund operating agreements. We have generally provided the third-party investors with rights to terminate the funds or to remove us as the general partner. Management fee revenue earned by our company was insignificant during the three months ended March 31, 2019 and 2018. In addition, our direct investment interest in these entities is insignificant at March 31, 2019. Thomas Weisel Capital Management LLC, a subsidiary of our company, acts as the general partner of a series of investment funds in venture capital and fund of funds and manages investment funds that are active buyers of secondary interests in private equity funds, as well as portfolios of direct interests in venture-backed companies. These partnerships have combined assets of $227.0 million at March 31, 2019. We hold variable interests in these funds as a result of our company’s rights to receive management fees. Our company’s investment in and additional capital commitments to the private equity funds are also considered variable interests. The additional capital commitments are subject to call at a later date and are limited in amount. Our exposure to loss is limited to our investments in, advances and commitments to, and receivables due from these funds, and that exposure is insignificant at March 31, 2019. Management fee revenue earned by our company was insignificant during the three months ended March 31, 2019 and 2018. 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. Additionally, for certain other entities, we reviewed other relevant accounting guidance, which states the general partner in a limited partnership is presumed to control that limited partnership. The presumption may be overcome if the limited partners have either: (1) the substantive ability to dissolve the limited partnership or otherwise remove the general partner without cause, or (2) substantive participating rights, which provide the limited partners with the ability to effectively participate in significant decisions that would be expected to be made in the ordinary course of the limited partnership’s business and thereby preclude the general partner from exercising unilateral control over the partnership. If the criteria are not met, the consolidation of the partnership or limited liability company is required. Based on our evaluation of these entities, we determined that these entities do not require consolidation. 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. Securitization Interests On July 31, 2018, the Company purchased 100% of the share capital of Jet Holding S.a.r.l. (“Jet Holdings”), which is the owner of 100% of the outstanding E-Certificates in FAN Engine Securitization Ltd. (“FAN”). FAN is a securitization which purchases, leases, and disposes of commercial aircraft engines. As of the acquisition date, FAN owned 24 leased aircraft engines through common law trusts and FAN Leasing Dublin Limited, all of which are wholly owned subsidiaries of FAN. As the holder of the E-Certificate, our obligation to absorb losses is limited to the equity at risk (in this instance the consideration paid to acquire the E-Certificate). The residual returns that could be potentially generated by the activities of FAN are not pro rata with our ownership interests in the securitization. In addition, we have the power to direct the activities of FAN. As such, we have determined that FAN is a variable interest entity with Jet Holdings the primary beneficiary; therefore, FAN has been consolidated in our financial statements. At March 31, 2019 and December 31, 2018, the assets of FAN, which primarily consisted of aircraft engines, certain of which are under operating leases, and liabilities, which primarily consisted of debt, were immaterial to our consolidated statements of financial condition.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	NOTE 26 – Subsequent Events We evaluate subsequent events that have occurred after the balance sheet date but before the financial statements are issued. There are two types of subsequent events: (1) recognized, or those that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements, and (2) non-recognized, or those that provide evidence about conditions that did not exist at the date of the balance sheet but arose after that date. Based on the evaluation, we did not identify any recognized subsequent events that would have required adjustment to the consolidated financial statements.

Nature of Operations, Basis o_2

Nature of Operations, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
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. We have offices throughout the United States and Europe. Our major geographic area of concentration is throughout the United States, with a growing presence in the United Kingdom and Europe. Our company’s principal customers are individual investors, corporations, municipalities, and institutions. On January 2, 2019, the Company completed the acquisition of First Empire Holding Corp. (“First Empire”) and its subsidiaries, including First Empire Securities, Inc., an institutional broker-dealer specializing in the fixed income markets. See Note 8 in the notes to consolidated financial statements for more details. Pro forma information is not presented, because the acquisition is not considered to be material, as defined by the SEC. The results of operations of First Empire have been included in our results prospectively from the date of acquisition.
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., and Stifel Bancorp, Inc. (“Stifel Bancorp”). 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, 2018 on file with the SEC. 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 represents a 27.5% third-party ownership of North Shore Aviation Holdings LLC (“North Shore”), a wholly owned subsidiary of the Company, that through its subsidiary owns airplane engines. We also 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. In determining whether to consolidate these entities, we evaluate whether the entity is a voting interest entity or a variable interest entity (“VIE”). When we do not have a controlling interest in an entity, but we exert significant influence over the entity, we apply the equity method of accounting. See Note 25 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, 2018. During the three months ended March 31, 2019, 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. 2016-02, “Leases” (the “new lease standard” or “ASU 2016-02”) on January 1, 2019. These lease policy updates are applied prospectively in our consolidated financial statements from January 1, 2019. 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.
Operating Leases	Operating Leases Our company enters into operating leases for real estate, office equipment and other assets, substantially all of which are used in connection with its operations. We adopted ASU 2016-02 on January 1, 2019, which required our company to recognize, for leases longer than one year, a right-of-use asset representing the right to use the underlying asset for the lease term, and a lease liability representing the liability to make payments. The lease term is generally determined based on the contractual maturity of the lease. For leases where our company has the option to terminate or extend the lease, an assessment of the likelihood of exercising the option is incorporated into the determination of the lease term. Such assessment is initially performed at the inception of the lease and is updated if events occur that impact the original assessment. An operating lease right-of-use asset is initially determined based on the operating lease liability, adjusted for initial direct costs, lease incentives and amounts paid at or prior to lease commencement. This amount is then amortized over the lease term. See Note 17 for information about operating leases. For leases where our company ceased using the space and management has concluded that it will not derive any future economic benefits, we record an impairment of right-of-use assets.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance Fair Value Measurement In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The objective of this guidance is to improve the effectiveness of disclosure requirements on fair value measurement by eliminating certain disclosure requirements for fair value measurements for all entities, requiring public entities to disclose certain new information and modifying some disclosure requirements. The accounting update is effective for the fiscal year beginning after December 15, 2019 (January 1, 2020 for our company) and early adoption is permitted. We early adopted the guidance in the update on January 1, 2019. The adoption of the accounting update did not have a material impact on our consolidated financial statements. See Note 4 for further information. Derivatives and Hedging In August 2017, the FASB issued ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities,” which amends the hedge accounting recognition and presentation requirements. The accounting update improves the transparency and understandability of information conveyed to financial statement users by better aligning companies’ hedging relationship to their existing risk management strategies, simplifies the application of hedge accounting and increases transparency regarding the scope and results of hedging program. The accounting update is effective for the fiscal year beginning after December 15, 2018 (January 1, 2019 for our company). The adoption of the accounting update did not have a material impact on our consolidated financial statements. See Note 12 for further information. Callable Debt Securities In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities,” which shortens the amortization period for the premium on certain callable debt securities to the earliest call date. The amendments are applicable to any purchased individual debt security with an explicit and non-contingent call feature that is callable at a fixed price on a preset date. The accounting update is effective for fiscal years beginning after December 15, 2018 (January 1, 2019 for our company) under a modified retrospective approach. The change was applied prospectively from January 1, 2019 and there is no impact to our previously presented results. The adoption of the accounting update resulted in a reduction of beginning retained earnings of $4.4 million after-tax as a cumulative effect of adoption of an accounting change. Leases In February 2016, the FASB issued ASU 2016-02 that requires for leases longer than one year, a lessee recognize in the statements of financial condition a right-of-use asset, representing the right to use the underlying asset for the lease term, and a lease liability, representing the liability to make lease payments. The accounting update also requires that for finance leases, a lessee recognize interest expense on the lease liability, separately from the amortization of the right-of-use asset in the statements of earnings, while for operating leases, such amounts should be recognized as a combined expense. In addition, this accounting update requires expanded disclosures about the nature and terms of lease agreements. This change was applied prospectively from January 1, 2019 and there is no impact on our previously presented results. Upon adoption, in accordance with the new lease standard, we elected to not reassess the lease classification or initial direct costs of existing leases, and to not reassess whether existing contracts contain a lease. In addition, we have elected to account for each contract’s lease and non-lease components as a single lease component. The adoption of the new lease standard resulted in a reduction of beginning retained earnings of $2.4 million after-tax as a cumulative effect of adoption of an accounting change. Upon adoption, the company recorded a gross up of approximately $670 million on its consolidated statements of financial condition to recognize the right-of-use assets, included in fixed assets, net and lease liabilities, included in accounts payable and accrued expenses.
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance Goodwill Impairment Testing In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment,” 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 accounting update is effective for annual or any interim impairment tests in fiscal years beginning after December 15, 2019 (January 1, 2020 for our company) and early adoption is permitted. We are currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements. Financial Instruments – Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments − Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” 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 will replace the loss model currently applicable to bank loans, held-to-maturity securities, and other receivables carried at amortized cost. The accounting update also eliminates the concept of other-than-temporary impairment for available-for-sale securities. Impairments on available-for-sale securities will be required to be recognized in earnings through an allowance, when the fair value is less than amortized cost and a credit loss exists or the securities are expected to be sold before recovery of amortized cost. Under the accounting update, there may be an ability to determine there are no expected credit losses in certain circumstances, e.g., based on collateral arrangements for lending and financing transactions or based on the credit quality of the borrower or issuer. Overall, the amendments in this accounting update are expected to accelerate the recognition of credit losses for portfolios where CECL models will be applied. The accounting update is effective for fiscal years beginning after December 15, 2019 (January 1, 2020 for our company) with early adoption permitted as of January 1, 2019. We are currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements.
Revenue Recognition	Commissions. We earn commission revenue by executing, settling, and clearing transactions for clients primarily in OTC and listed equity securities, insurance products, and options. Trade execution and clearing and custody services, when provided together, represent a single performance obligation as the services are not separately identifiable in the context of the contract. Commission revenues associated with combined trade execution and clearing and custody services, as well as trade execution services on a standalone basis, are recognized at a point in time on trade-date. Commission revenues are generally paid on settlement date and we record a receivable between trade-date and payment on settlement date. Investment Banking. We provide our clients with a full range of capital markets and financial advisory services. Capital markets services include underwriting and placement agent services in both the equity and debt capital markets, including private equity placements, initial public offerings, follow-on offerings, underwriting and distributing public and private debt. Capital raising revenues are recognized at a point in time on trade-date, as the client obtains the control and benefit of the capital markets offering at that point. Costs associated with capital raising transactions are deferred until the related revenue is recognized or the engagement is otherwise concluded, and are recorded on a gross basis within other operating expenses in the consolidated statements of operations as we are acting as a principal in the arrangement. Any expenses reimbursed by our clients are recognized as investment banking revenues. Revenues from financial advisory services primarily consist of fees generated in connection with merger, acquisition and restructuring transactions. Advisory fees from mergers and acquisitions engagements are recognized at a point in time when the related transaction is completed, as the performance obligation is to successfully broker a specific transaction. Fees received prior to the completion of the transaction are deferred within accounts payable and accrued expenses on the consolidated statements of financial condition. Advisory fees from restructuring engagements are recognized over time using a time elapsed measure of progress as our clients simultaneously receive and consume the benefits of those services as they are provided. A significant portion of the fees we receive for our advisory services are considered variable as they are contingent upon a future event (e.g., completion of a transaction or third party emergence from bankruptcy) and are excluded from the transaction price until the uncertainty associated with the variable consideration is subsequently resolved, which is expected to occur upon achievement of the specified milestone. Payment for advisory services are generally due promptly upon completion of a specified milestone or, for retainer fees, periodically over the course of the engagement. We recognize a receivable between the date of completion of the milestone and payment by the customer. Expenses associated with investment banking advisory engagements are deferred only to the extent they are explicitly reimbursable by the client and the related revenue is recognized at the same time as the associated revenues. All other investment banking advisory related expenses, including expenses incurred related to restructuring assignments, are expensed as incurred. All investment banking advisory expenses are recognized within other operating expenses on the consolidated statements of operations and any expenses reimbursed by our clients are recognized as investment banking revenues. Asset Management Fees. We earn management and performance fees in connection with investment advisory services provided to institutional and individual clients. Investment advisory fees are charged based on the value of assets in fee-based accounts and are affected by changes in the balances of client assets due to market fluctuations and levels of net new client assets. Fees are charged either in advance based on fixed rates applied to the value of the customers’ account at the beginning of the period or periodically based on contracted rates and account performance. Contracts can be terminated at any time with no incremental payments due to our company upon termination. If the contract is terminated by the customer fees are prorated for the period and fees charged for the post termination period are refundable to the customer.

Receivables From And Payables_2

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Tables)	3 Months Ended
	Mar. 31, 2019
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Amounts Receivable From Brokers, Dealers, And Clearing Organizations	Amounts receivable from brokers, dealers, and clearing organizations at March 31, 2019 and December 31, 2018, included (in thousands) March 31, 2019 December 31, 2018 Receivables from clearing organizations $ 447,084 $ 320,277 Deposits paid for securities borrowed 115,223 109,795 Securities failed to deliver 26,194 85,502 $ 588,501 $ 515,574
Amounts Payable To Brokers, Dealers, And Clearing Organizations	Amounts payable to brokers, dealers, and clearing organizations at March 31, 2019 and December 31, 2018, included (in thousands) March 31, 2019 December 31, 2018 Deposits received from securities loaned $ 525,115 $ 392,163 Securities failed to receive 31,618 27,975 Payable to clearing organizations 30,157 12,161 $ 586,890 $ 432,299

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value	March 31, 2019 Fair value of investments Unfunded commitments Money market funds $ 20,691 $ — Mutual funds 7,018 — Private equity funds 3,426 1,480 Partnership interests 4,153 1,018 Total $ 35,288 $ 2,498 December 31, 2018 Fair value of investments Unfunded commitments Money market funds $ 19,719 $ — Mutual funds 9,122 — Private equity funds 3,461 1,480 Partnership interests 3,976 1,024 Total $ 36,278 $ 2,504
Fair Value Of Assets And Liabilities Measured On Recurring Basis	March 31, 2019 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 27,326 $ 27,326 $ — $ — U.S. government agency securities 117,701 — 117,701 — Mortgage-backed securities: Agency 514,718 — 514,718 — Non-agency 8,159 — 8,159 — Asset-backed securities 56,514 — 56,339 175 Corporate securities: Fixed income securities 336,317 1,946 334,371 — Equity securities 54,779 54,711 68 — Sovereign debt 2,351 — 2,351 — State and municipal securities 179,626 — 179,626 — Total financial instruments owned 1,297,491 83,983 1,213,333 175 Available-for-sale securities: U.S. government agency securities 5,368 418 4,950 — State and municipal securities 49,118 — 49,118 — Mortgage-backed securities: Agency 215,417 — 215,417 — Commercial 71,377 — 71,377 — Non-agency 1,148 — 1,148 — Corporate fixed income securities 947,588 — 947,588 — Asset-backed securities 1,713,751 — 1,713,751 — Total available-for-sale securities 3,003,767 418 3,003,349 — Investments: Corporate equity securities 37,264 36,077 1,187 — Auction rate securities: Equity securities 16,632 — — 16,632 Municipal securities 704 — — 704 Other 1,028 — 175 853 Investments in funds measured at NAV 14,597 Total investments 70,225 36,077 1,362 18,189 Cash equivalents measured at NAV 20,691 Derivative contracts (1) 4,896 — 4,896 — $ 4,397,070 $ 120,478 $ 4,222,940 $ 18,364 (1) March 31, 2019 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 548,357 $ 548,357 $ — $ — U.S. government agency securities 49 — 49 — Mortgage-backed securities: Agency 180,287 — 180,287 — Corporate securities: Fixed income securities 195,642 269 195,373 — Equity securities 53,182 53,182 — — Sovereign debt 1,599 — 1,599 — Total financial instruments sold, but not yet purchased $ 979,116 $ 601,808 $ 377,308 $ — Assets and liabilities measured at fair value on a recurring basis as of December 31, 2018, are presented below (in thousands) December 31, 2018 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 42,121 $ 42,121 $ — $ — U.S. government agency securities 72,532 — 72,532 — Mortgage-backed securities: Agency 564,111 — 564,111 — Non-agency 25,727 — 25,726 1 Asset-backed securities 25,905 — 25,730 175 Corporate securities: Fixed income securities 310,457 1,100 309,357 — Equity securities 57,911 57,125 786 — Sovereign debt 14,063 — 14,063 — State and municipal securities 154,622 — 154,622 — Total financial instruments owned 1,267,449 100,346 1,166,927 176 Available-for-sale securities: U.S. government agency securities 5,215 417 4,798 — State and municipal securities 68,226 — 68,226 — Mortgage-backed securities: Agency 230,408 — 230,408 — Commercial 69,715 — 69,715 — Non-agency 1,219 — 1,219 — Corporate fixed income securities 931,604 — 931,604 — Asset-backed securities 1,764,060 — 1,764,060 — Total available-for-sale securities 3,070,447 417 3,070,030 — Investments: Corporate equity securities 33,046 31,670 1,376 — Auction rate securities: Equity securities 16,632 — — 16,632 Municipal securities 704 — — 704 Other 1,041 — 184 857 Investments measured at NAV 16,559 Total investments 67,982 31,670 1,560 18,193 Cash equivalents measured at NAV 19,719 Derivative contracts (1) 7,683 — 7,683 — $ 4,433,280 $ 132,433 $ 4,246,200 $ 18,369 (1) December 31, 2018 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 534,817 $ 534,817 $ — $ — U.S. government agency securities 32,755 — 32,755 — Mortgage-backed securities: Agency 123,456 — 123,456 — Corporate securities: Fixed income securities 208,725 1,289 207,436 — Equity securities 36,117 35,398 719 — Sovereign debt 11,429 — 11,429 — State and municipal securities 7 — 7 — Total financial instruments sold, but not yet purchased $ 947,306 $ 571,504 $ 375,802 $ —
Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments	Three Months Ended March 31, 2019 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Asset-Backed Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2018 $ 1 $ 175 $ 16,632 $ 704 $ 857 Unrealized gains/(losses): Included in changes in net assets (1) — — — — — Realized gains/(losses) (1) (1 ) — — — — Purchases — — — — — Sales — — — — — Redemptions — — — — (4 ) Transfers: Into Level 3 — — — — — Out of Level 3 — — — — — Net change (1 ) — — — (4 ) Balance at March 31, 2019 $ — $ 175 $ 16,632 $ 704 $ 853 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations.
Quantitative Information Related To The Significant Unobservable Inputs Utilized In Level 3 Recurring Fair Value Measurements	Valuation technique Unobservable input Range Weighted average Investments: Auction rate securities: Equity securities Discounted cash flow Discount rate 0.0% - 5.6% 3.2% Workout period 2-3 years 2.4 years Municipal securities Discounted cash flow Discount rate 0.7% - 8.3% 2.8% Workout period 1-4 years 2.0 years
Schedule Of Fair Value Of Financial Instruments	March 31, 2019 December 31, 2018 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 777,781 $ 777,781 $ 1,936,560 $ 1,936,560 Cash segregated for regulatory purposes 73,684 73,684 132,814 132,814 Securities purchased under agreements to resell 568,034 568,034 699,900 699,900 Financial instruments owned 1,297,491 1,297,491 1,267,449 1,267,449 Available-for-sale securities 3,003,767 3,003,767 3,070,447 3,070,447 Held-to-maturity securities 4,103,562 4,056,845 4,218,854 4,122,907 Bank loans 8,706,689 8,782,968 8,517,615 8,565,347 Loans held for sale 144,216 144,216 205,557 205,557 Investments 70,225 70,225 67,982 67,982 Derivative contracts (1) 4,896 4,896 7,683 7,683 Financial liabilities: Securities sold under agreements to repurchase $ 466,284 $ 466,284 $ 535,394 $ 535,394 Bank deposits 15,049,877 14,065,660 15,863,613 14,661,996 Financial instruments sold, but not yet purchased 979,116 979,116 947,306 947,306 Federal Home Loan Bank advances 250,000 250,000 540,000 540,000 Borrowings 398,970 398,970 180,655 180,655 Senior notes 1,016,116 1,034,487 1,015,973 989,790 Debentures to Stifel Financial Capital Trusts 60,000 47,513 60,000 49,747 (1)
Estimated Fair Values Of Financial Instruments Not Measured At Fair Value	March 31, 2019 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 757,090 $ 757,090 $ — $ — Cash segregated for regulatory purposes 73,684 73,684 — — Securities purchased under agreements to resell 568,034 552,229 15,805 — Held-to-maturity securities 4,056,845 — 3,895,569 161,276 Bank loans 8,782,968 — 8,782,968 — Loans held for sale 144,216 — 144,216 — Financial liabilities: Securities sold under agreements to repurchase $ 466,284 $ 51,978 $ 414,306 $ — Bank deposits 14,065,660 — 14,065,660 — Federal Home Loan Bank advances 250,000 250,000 — — Borrowings 398,970 398,970 — — Senior notes 1,034,487 1,034,487 — — Debentures to Stifel Financial Capital Trusts 47,513 — — 47,513 December 31, 2018 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,916,841 $ 1,916,841 $ — $ — Cash segregated for regulatory purposes 132,814 132,814 — — Securities purchased under agreements to resell 699,900 645,632 54,268 — Held-to-maturity securities 4,122,907 — 3,960,099 162,808 Bank loans 8,565,347 — 8,565,347 — Loans held for sale 205,557 — 205,557 — Financial liabilities: Securities sold under agreements to repurchase $ 535,394 $ 87,273 $ 448,121 $ — Bank deposits 14,661,996 — 14,661,996 — Federal Home Loan Bank advances 540,000 540,000 — — Borrowings 180,655 180,655 — — Senior notes 989,790 989,790 — — Debentures to Stifel Financial Capital Trusts 49,747 — — 49,747

Financial Instruments Owned A_2

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables)	3 Months Ended
	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased	The components of financial instruments owned and financial instruments sold, but not yet purchased, at March 31, 2019 and December 31, 2018 are as follows (in thousands) March 31, 2019 December 31, 2018 Financial instruments owned: U.S. government securities $ 27,326 $ 42,121 U.S. government agency securities 117,701 72,532 Mortgage-backed securities: Agency 514,718 564,111 Non-agency 8,159 25,727 Asset-backed securities 56,514 25,905 Corporate securities: Fixed income securities 336,317 310,457 Equity securities 54,779 57,911 Sovereign debt 2,351 14,063 State and municipal securities 179,626 154,622 $ 1,297,491 $ 1,267,449 Financial instruments sold, but not yet purchased: U.S. government securities $ 548,357 $ 534,817 U.S. government agency securities 49 32,755 Mortgage-backed securities: Agency 180,287 123,456 Corporate securities: Fixed income securities 195,642 208,725 Equity securities 53,182 36,117 Sovereign debt 1,599 11,429 State and municipal securities — 7 $ 979,116 $ 947,306

Available-For-Sale And Held-T_2

Available-For-Sale And Held-To-Maturity Securities (Tables)	3 Months Ended
	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Schedule Of Amortized Cost And Fair Values Of Available For Sale Securities And Held To Maturity Securities	The following tables provide a summary of the amortized cost and fair values of the available-for-sale securities and held-to-maturity securities at March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,367 $ 23 $ (22 ) $ 5,368 State and municipal securities 49,011 107 — 49,118 Mortgage-backed securities: Agency 216,959 325 (1,867 ) 215,417 Commercial 74,117 4 (2,744 ) 71,377 Non-agency 1,176 — (28 ) 1,148 Corporate fixed income securities 950,997 2,007 (5,416 ) 947,588 Asset-backed securities 1,726,984 561 (13,794 ) 1,713,751 $ 3,024,611 $ 3,027 $ (23,871 ) $ 3,003,767 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,168,095 $ 4,841 $ (16,346 ) $ 1,156,590 Commercial 37,739 336 — 38,075 Asset-backed securities 2,897,728 3,302 (38,850 ) 2,862,180 $ 4,103,562 $ 8,479 $ (55,196 ) $ 4,056,845 December 31, 2018 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,237 $ 13 $ (35 ) $ 5,215 State and municipal securities 72,487 — (4,261 ) 68,226 Mortgage-backed securities: Agency 234,292 88 (3,972 ) 230,408 Commercial 74,411 4 (4,700 ) 69,715 Non-agency 1,245 — (26 ) 1,219 Corporate fixed income securities 958,406 — (26,802 ) 931,604 Asset-backed securities 1,779,496 672 (16,108 ) 1,764,060 $ 3,125,574 $ 777 $ (55,904 ) $ 3,070,447 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,198,442 $ 1,307 $ (31,689 ) $ 1,168,060 Commercial 51,524 185 — 51,709 Asset-backed securities 2,968,888 4,585 (70,335 ) 2,903,138 $ 4,218,854 $ 6,077 $ (102,024 ) $ 4,122,907 (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 Available-For-Sale Securities And Held-To-Maturity Securities By Contractual Maturity	The table below summarizes the amortized cost and fair values of our available-for-sale securities and held-to-maturity securities by contractual maturity. Expected maturities may differ significantly from contractual maturities, as issuers may have the right to call or prepay obligations with or without call or prepayment penalties. March 31, 2019 Available-for-sale securities Held-to-maturity securities Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Debt securities Within one year $ 2,520 $ 2,508 $ — $ — After one year through three years 268,305 265,943 — — After three years through five years 382,387 381,155 — — After five years through ten years 556,764 557,014 475,640 474,910 After ten years 1,522,383 1,509,205 2,422,088 2,387,270 Mortgage-backed securities After one year through three years 195 198 48,669 49,005 After three years through five years 1,106 1,119 — — After five years through ten years 5,492 5,607 160,488 159,315 After ten years 285,459 281,018 996,677 986,345 $ 3,024,611 $ 3,003,767 $ 4,103,562 $ 4,056,845
Contractual Maturities	The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at March 31, 2019, are as follows ( in thousands Within 1 Year 1-5 Years 5-10 Years After 10 Years Total Available-for-sale: (1) U.S. government agency securities $ 1,910 $ 3,458 $ — $ — $ 5,368 State and municipal securities — — 18,171 30,947 49,118 Mortgage-backed securities: Agency — 1,317 5,607 208,493 215,417 Commercial — — — 71,377 71,377 Non-agency — — — 1,148 1,148 Corporate fixed income securities 598 643,640 303,350 — 947,588 Asset-backed securities — — 235,493 1,478,258 1,713,751 $ 2,508 $ 648,415 $ 562,621 $ 1,790,223 $ 3,003,767 Held-to-maturity: Mortgage-backed securities: Agency $ — $ 10,930 $ 160,488 $ 996,677 $ 1,168,095 Commercial — 37,739 — — 37,739 Asset-backed securities — — 475,640 2,422,088 2,897,728 $ — $ 48,669 $ 636,128 $ 3,418,765 $ 4,103,562 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time	The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at March 31, 2019 (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 U.S. government securities $ (22 ) $ 3,173 $ — $ — $ (22 ) $ 3,173 Mortgage-backed securities: Agency (1 ) 150 (1,866 ) 83,461 (1,867 ) 83,611 Commercial — — (2,744 ) 70,628 (2,744 ) 70,628 Non-agency (28 ) 1,146 — — (28 ) 1,146 Corporate fixed income securities (106 ) 104,241 (5,310 ) 505,628 (5,416 ) 609,869 Asset-backed securities (13,794 ) 1,273,856 — — (13,794 ) 1,273,856 $ (13,951 ) $ 1,382,566 $ (9,920 ) $ 659,717 $ (23,871 ) $ 2,042,283 Held-to-maturity securities Mortgage-backed securities: Agency $ (39 ) $ 118,702 $ (16,307 ) $ 642,543 $ (16,346 ) $ 761,245 Asset-backed securities (31,877 ) 2,111,245 (6,973 ) 229,646 (38,850 ) 2,340,891 $ (31,916 ) $ 2,229,947 $ (23,280 ) $ 872,189 $ (55,196 ) $ 3,102,136

Bank Loans (Tables)

Bank Loans (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio	March 31, 2019 December 31, 2018 Balance Percent Balance Percent Commercial and industrial $ 3,314,564 37.6 % $ 3,304,234 38.5 % Residential real estate 2,928,228 33.2 2,875,014 33.5 Securities-based loans 1,860,989 21.1 1,786,966 20.8 Commercial real estate 361,950 4.1 318,961 3.7 Construction and land 175,023 2.0 138,245 1.6 Home equity lines of credit 44,235 0.5 38,098 0.4 Other 124,095 1.5 120,129 1.5 Gross bank loans 8,809,084 100.0 % 8,581,647 100.0 % Unamortized loan discount, net (10,624 ) (12,155 ) Loans in process (5,075 ) 27,984 Unamortized loan fees, net 1,476 5,972 Allowance for loan losses (88,172 ) (85,833 ) Bank loans, net $ 8,706,689 $ 8,517,615
Activity In The Allowance For Loan Losses By Portfolio Segment	Three Months Ended March 31, 2019 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 68,367 $ 211 $ (12 ) $ — $ 68,566 Residential real estate 11,228 270 — 87 11,585 Securities-based loans 1,978 249 — — 2,227 Commercial real estate 1,778 643 — — 2,421 Construction and land 1,241 483 — — 1,724 Home equity lines of credit 310 61 — 1 372 Other 88 78 (44 ) 24 146 Qualitative 843 288 — — 1,131 $ 85,833 $ 2,283 $ (56 ) $ 112 $ 88,172 Three Months Ended March 31, 2018 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 54,474 $ 1,971 $ (12 ) $ — $ 56,433 Residential real estate 8,430 349 — — 8,779 Securities-based loans 2,088 (194 ) — — 1,894 Commercial real estate 1,520 (200 ) — — 1,320 Home equity lines of credit 162 1 — 1 164 Construction and land 100 99 — — 199 Other 16 — (2 ) 1 15 Qualitative 676 17 — — 693 $ 67,466 $ 2,043 $ (14 ) $ 2 $ 69,497
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 $ 8,677 $ 59,889 $ 68,566 $ 23,654 $ 3,290,910 $ 3,314,564 Residential real estate 24 11,561 11,585 619 2,927,609 2,928,228 Securities-based loans — 2,227 2,227 — 1,860,989 1,860,989 Commercial real estate — 2,421 2,421 — 361,950 361,950 Construction and land — 1,724 1,724 — 175,023 175,023 Home equity lines of credit — 372 372 184 44,051 44,235 Other 24 122 146 196 123,899 124,095 Qualitative — 1,131 1,131 — — — $ 8,725 $ 79,447 $ 88,172 $ 24,653 $ 8,784,431 $ 8,809,084 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 $ 8,678 $ 59,689 $ 68,367 $ 23,677 $ 3,280,557 $ 3,304,234 Residential real estate 24 11,204 11,228 519 2,874,495 2,875,014 Securities-based loans — 1,978 1,978 — 1,786,966 1,786,966 Commercial real estate — 1,778 1,778 — 318,961 318,961 Construction and land — 1,241 1,241 — 138,245 138,245 Home equity lines of credit — 310 310 184 37,914 38,098 Other 1 87 88 21 120,108 120,129 Qualitative — 843 843 — — — $ 8,703 $ 77,130 $ 85,833 $ 24,401 $ 8,557,246 $ 8,581,647
Loans That Were Individually Evaluated For Impairment By Portfolio Segment	March 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 $ 23,654 $ 220 $ 23,434 $ 23,654 $ 8,677 $ 23,821 Residential real estate 677 452 167 619 24 630 Home equity lines of credit 184 184 — 184 — 184 Other 345 — 196 196 24 233 Total $ 24,860 $ 856 $ 23,797 $ 24,653 $ 8,725 $ 24,868 December 31, 2018 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 23,677 $ 242 $ 23,435 $ 23,677 $ 8,678 $ 23,807 Residential real estate 544 352 167 519 24 275 Home equity lines of credit 184 184 — 184 — 184 Other 694 11 10 21 1 70 Total $ 25,099 $ 789 $ 23,612 $ 24,401 $ 8,703 $ 24,336
Aging Of The Recorded Investment In Past Due Loans	As of March 31, 2019 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Commercial and industrial $ — $ 14,644 $ 14,644 $ 3,299,920 $ 3,314,564 Residential real estate 5,944 227 6,171 2,922,057 2,928,228 Securities-based loans — — — 1,860,989 1,860,989 Commercial real estate — — — 361,950 361,950 Construction and land — — — 175,023 175,023 Home equity lines of credit — — — 44,235 44,235 Other 45 65 110 123,985 124,095 Total $ 5,989 $ 14,936 $ 20,925 $ 8,788,159 $ 8,809,084 As of March 31, 2019* Non-Accrual Restructured Total Commercial and industrial $ 14,718 $ 8,936 $ 23,654 Residential real estate 452 167 619 Home equity lines of credit 184 — 184 Other 196 — 196 Total $ 15,550 $ 9,103 $ 24,653 * There were no loans past due 90 days and still accruing interest at March 31, 2019. As of December 31, 2018 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ — $ 14,656 $ 14,656 $ 3,289,578 $ 3,304,234 Residential real estate 6,970 377 7,347 2,867,667 2,875,014 Securities-based loans — — — 1,786,966 1,786,966 Commercial real estate — — — 318,961 318,961 Construction and land — — — 138,245 138,245 Home equity lines of credit 33 — 33 38,065 38,098 Other — 134 134 119,995 120,129 Total $ 7,003 $ 15,167 $ 22,170 $ 8,559,477 $ 8,581,647 As of December 31, 2018* Non-Accrual Restructured Total Commercial and industrial $ 14,741 $ 8,936 $ 23,677 Residential real estate 352 167 519 Home equity lines of credit 184 — 184 Other 21 — 21 Total $ 15,298 $ 9,103 $ 24,401 * There were no loans past due 90 days and still accruing interest at December 31, 2018.
Risk Category Of Loan Portfolio	As of March 31, 2019 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,265,303 $ 22,281 $ 26,980 $ — $ 3,314,564 Residential real estate 2,927,609 — 619 — 2,928,228 Securities-based loans 1,860,989 — — — 1,860,989 Commercial real estate 361,950 — — — 361,950 Construction and land 175,023 — — — 175,023 Home equity lines of credit 44,051 — 184 — 44,235 Other 123,677 222 — 196 124,095 Total $ 8,758,602 $ 22,503 $ 27,783 $ 196 $ 8,809,084 As of December 31, 2018 Pass Special Substandard Doubtful Total Commercial and industrial $ 3,254,698 $ 34,795 $ 14,741 $ — $ 3,304,234 Residential real estate 2,874,495 — 519 — 2,875,014 Securities-based loans 1,786,966 — — — 1,786,966 Commercial real estate 318,961 — — — 318,961 Construction and land 138,245 — — — 138,245 Home equity lines of credit 37,914 — 184 — 38,098 Other 119,912 196 — 21 120,129 Total $ 8,531,191 $ 34,991 $ 15,444 $ 21 $ 8,581,647

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
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, 2018 Adjustments Write-off March 31, 2019 Goodwill Global Wealth Management $ 340,395 $ 6,998 $ — $ 347,393 Institutional Group 694,284 14,434 — 708,718 $ 1,034,679 $ 21,432 $ — $ 1,056,111 December 31, 2018 Net Additions Amortization March 31, 2019 Intangible assets Global Wealth Management $ 60,532 $ — $ (1,847 ) $ 58,685 Institutional Group 59,123 7,768 (1,746 ) 65,145 $ 119,655 $ 7,768 $ (3,593 ) $ 123,830
Intangible Assets Subject To Amortization	Intangible assets subject to amortization as of March 31, 2019 and December 31, 2018 were as follows (in thousands) March 31, 2019 December 31, 2018 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 160,819 $ 67,661 $ 160,745 $ 65,254 Trade name 26,831 12,136 26,831 11,755 Core deposits 8,615 1,384 8,615 816 Non-compete agreements 2,714 1,674 2,603 1,452 Investment banking backlog 1,445 1,311 1,431 1,293 Estimated First Empire intangibles (1) 7,700 128 — — $ 208,124 $ 84,294 $ 200,225 $ 80,570 (1)
Amortization Expense In Future Periods	As of March 31, 2019, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2019 $ 10,577 2020 13,586 2021 12,732 2022 11,916 2023 11,249 Thereafter 61,652 $ 121,712

Senior Notes (Tables)

Senior Notes (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Summary of Senior Notes	The following table summarizes our senior notes as of March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 December 31, 2018 4.250% 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 1,025,000 1,025,000 Debt issuance costs, net (8,884 ) (9,027 ) Senior notes, net $ 1,016,116 $ 1,015,973 (1) In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.250% senior notes due July 2024. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. In July 2016, we issued an additional $200.0 million in aggregate principal amount of 4.25% senior notes due 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. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. (3)
Schedule of Corporate Date Maturity	Our senior notes mature as follows, based upon contractual terms (in thousands) 2019 $ — 2020 300,000 2021 — 2022 — 2023 — Thereafter 725,000 $ 1,025,000

Bank Deposits (Tables)

Bank Deposits (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 and December 31, 2018 were as follows (in thousands) March 31, 2019 December 31, 2018 Money market and savings accounts $ 13,354,624 $ 13,609,612 Certificates of deposit 1,174,386 1,763,336 Demand deposits (interest-bearing) 420,712 392,765 Demand deposits (non-interest-bearing) 100,155 97,900 $ 15,049,877 $ 15,863,613
Schedule of Maturities of Certificates of Deposit	Scheduled maturities of certificates of deposit at March 31, 2019 and December 31, 2018 were as follows (in thousands) March 31, 2019 December 31, 2018 Certificates of deposit, less than $100,000: Within one year $ 4,974 $ 4,858 One to three years 480 623 Three to five years 81 140 $ 5,535 $ 5,621 Certificates of deposit, $100,000 and greater: Within one year $ 1,002,302 $ 1,535,784 One to three years 142,802 195,159 Three to five years 23,747 26,772 1,168,851 1,757,715 $ 1,174,386 $ 1,763,336

Derivative Instruments And He_2

Derivative Instruments And Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2019
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Schedule Of Notional Values And Fair Values Of Derivative Instruments Designated As Hedging Instruments	The following table provides the notional values and fair values of our derivative instruments designated as hedging instruments as of March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 Notional Balance Location Fair Value Derivative Assets Cash flow interest rate contracts $ 250,000 Other assets $ 4,896 December 31, 2018 Notional Value Balance Location Fair Value Derivative Assets Cash flow interest rate contracts $ 540,000 Other assets $ 7,683
Schedule Of Derivative Instruments In Consolidated Statements Of Operations	The following table shows the effect of our company’s derivative instruments in the consolidated statements of operations for the three months ended March 31, 2019 and 2018 (in thousands) Gain/(Loss) Recognized in OCI Gain Reclassified From OCI Into Income Three Months Ended March 31, Three Months Ended March 31, 2019 2018 2019 2018 Cash flow interest rate contracts $ 925 $ (3,818 ) $ 1,542 $ 533

Disclosures About Offsetting _2

Disclosures About Offsetting Assets And Liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 and December 31, 2018 (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 March 31, 2019: Securities borrowing (1) $ 115,223 $ — $ 115,223 $ (64,520 ) $ (47,133 ) $ 3,570 Reverse repurchase agreements (2) 568,034 — 568,034 (28,740 ) (539,121 ) 173 Cash flow interest rate contracts 4,896 — 4,896 — — 4,896 $ 688,153 $ — $ 688,153 $ (93,260 ) $ (586,254 ) $ 8,639 As of December 31, 2018: Securities borrowing (1) $ 109,795 $ — $ 109,795 $ (57,328 ) $ (45,005 ) $ 7,462 Reverse repurchase agreements (2) 699,900 — 699,900 (365,822 ) (329,740 ) 4,338 Cash flow interest rate contracts 7,683 — 7,683 — — 7,683 $ 817,378 $ — $ 817,378 $ (423,150 ) $ (374,745 ) $ 19,483 (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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, respectively.
Financial Liabilities That Are Subject To Offset	The following table provides information about financial liabilities that are subject to offset as of March 31, 2019 and December 31, 2018 (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 March 31, 2019: Securities lending (3) $ (525,115 ) $ — $ (525,115 ) $ 64,520 $ 460,594 $ (1 ) Repurchase agreements (4) (466,284 ) — (466,284 ) 28,740 437,544 — $ (991,399 ) $ — $ (991,399 ) $ 93,260 $ 898,138 $ (1 ) As of December 31, 2018: Securities lending (3) $ (392,163 ) $ — $ (392,163 ) $ 57,328 $ 325,110 $ (9,725 ) Repurchase agreements (4) (535,394 ) — (535,394 ) 365,822 169,572 — $ (927,557 ) $ — $ (927,557 ) $ 423,150 $ 494,682 $ (9,725 ) (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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, respectively.

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	3 Months Ended
	Mar. 31, 2019
Regulatory Capital Requirements [Abstract]
Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios	Stifel Financial Corp. – Federal Reserve Capital Amounts March 31, 2019 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,942,586 15.9 % $ 549,675 4.5 % $ 793,975 6.5 % Tier 1 capital 2,256,249 18.5 % 732,900 6.0 % 977,200 8.0 % Total capital 2,403,426 19.7 % 977,200 8.0 % 1,221,500 10.0 % Tier 1 leverage 2,256,249 9.8 % 919,050 4.0 % 1,148,812 5.0 % Stifel Bank & Trust – Federal Reserve Capital Amounts March 31, 2019 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,105,446 13.7 % $ 361,998 4.5 % $ 522,885 6.5 % Tier 1 capital 1,109,109 13.8 % 482,663 6.0 % 643,551 8.0 % Total capital 1,197,212 14.9 % 643,551 8.0 % 804,439 10.0 % Tier 1 leverage 1,109,109 7.1 % 624,945 4.0 % 781,182 5.0 % Stifel Bank – Federal Reserve Capital Amounts March 31, 2019 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 135,189 17.5 % $ 34,754 4.5 % $ 50,200 6.5 % Tier 1 capital 135,189 17.5 % 46,338 6.0 % 61,784 8.0 % Total capital 143,745 18.6 % 61,784 8.0 % 77,230 10.0 % Tier 1 leverage 135,189 7.5 % 72,561 4.0 % 90,702 5.0 %

Operating Leases (Tables)

Operating Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Schedule of Information About Operating Lease Liabilities	The table below presents information about operating lease liabilities as of March 31, 2019, (in thousands, except percentages) Remainder of 2019 $ 65,058 2020 84,120 2021 79,102 2022 78,288 2023 76,386 Thereafter 485,856 Total undiscounted lease payments 868,810 Imputed interest (198,035 ) Total operating lease liabilities $ 670,775 Weighted average remaining lease term 11.9 years Weighted average discount rate 4.58 %
Non-cancelable Leases [Member]
Schedule of Information About Operating Lease Liabilities	As of March 31, 2019, minimum future payments under non-cancelable leases were (in thousands) Remainder of 2019 $ 25,478 2020 22,099 2021 18,012 2022 10,004 2023 4,889 Thereafter 10,420 $ 90,902

Revenues from Contracts with _2

Revenues from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2019
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 months ended March 31, 2019 (in thousands) Three Months Ended March 31, 2019 2018 Revenues from contracts with customers: Commissions $ 155,449 $ 165,775 Investment banking 161,840 176,362 Asset management and service fees 195,267 195,801 Other 3,782 3,718 Total revenue from contracts with customers 516,338 541,656 Other sources of revenue: Interest 191,071 137,734 Principal transactions 104,032 97,782 Other 8,427 (361 ) Total revenues $ 819,868 $ 776,811
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 disaggregated by major business activity and primary geographic regions for the three months ended March 31, 2019 and 2018 (in thousands) Three Months Ended March 31, 2019 Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 109,927 $ 45,522 $ — $ 155,449 Capital raising (1) 8,223 48,722 — 56,945 Advisory fees (1) — 104,895 — 104,895 Investment banking 8,223 153,617 — 161,840 Asset management 195,253 14 — 195,267 Other 2,455 — 1,327 3,782 Total 315,858 199,153 1,327 516,338 Primary Geographic Region: United States 315,858 176,740 1,327 493,925 United Kingdom — 21,103 — 21,103 Other — 1,310 — 1,310 $ 315,858 $ 199,153 $ 1,327 $ 516,338 Three Months Ended March 31, 2018 Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 119,205 $ 46,570 $ — $ 165,775 Capital raising (1) 7,688 71,001 — 78,689 Advisory fees (1) — 97,673 — 97,673 Investment banking 7,688 168,674 — 176,362 Asset management 195,789 12 — 195,801 Other 2,686 — 1,032 3,718 Total 325,368 215,256 1,032 541,656 Primary Geographic Region: United States 325,368 176,350 1,032 502,750 United Kingdom — 37,879 — 37,879 Other — 1,027 — 1,027 $ 325,368 $ 215,256 $ 1,032 $ 541,656 (1)

Interest Income and Interest _2

Interest Income and Interest Expense (Tables)	3 Months Ended
	Mar. 31, 2019
Banking And Thrift Interest [Abstract]
Components Of Interest Income And Interest Expense	The components of interest income and interest expense are as follows (in thousands) Three Months Ended March 31, 2019 2018 Interest income: Bank loans, net $ 93,224 $ 63,635 Investment securities 65,466 54,903 Margin balances 13,440 10,950 Financial instruments owned 6,313 4,929 Other 12,628 3,317 $ 191,071 $ 137,734 Interest expense: Bank deposits $ 28,066 $ 8,130 Senior notes 11,122 11,118 Federal Home Loan Bank advances 1,678 3,252 Other 8,582 3,953 $ 49,448 $ 26,453

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Schedule Of Operating Information, Segment	Information concerning operations in these segments of business for the three months ended March 31, 2019 and 2018 is as follows (in thousands) Three Months Ended March 31, 2019 2018 Net revenues: (1) Global Wealth Management $ 510,610 $ 485,575 Institutional Group 261,286 270,078 Other (1,476 ) (5,295 ) $ 770,420 $ 750,358 Income/(loss) before income taxes: Global Wealth Management $ 194,490 $ 176,771 Institutional Group 32,204 44,570 Other (88,885 ) (101,787 ) $ 137,809 $ 119,554 (1) No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2019 or 2018.
Schedule Of Information Of Total Assets On Segment Basis	The following table presents our company’s total assets on a segment basis at March 31, 2019 and December 31, 2018 (in thousands) March 31, 2019 December 31, 2018 Global Wealth Management $ 20,350,939 $ 21,040,224 Institutional Group 3,567,420 3,238,617 Other 265,200 240,757 $ 24,183,559 $ 24,519,598
Schedule Of Net Revenues Earned On Major Geographical Areas	Revenues, classified by the major geographic areas in which they are earned for the three months ended March 31, 2019 and 2018, were as follows (in thousands) Three Months Ended March 31, 2019 2018 United States $ 741,230 $ 706,068 United Kingdom 26,390 41,558 Other 2,800 2,732 $ 770,420 $ 750,358

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Computation Of Basic And Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2019 and 2018 (in thousands, except per share data) Three Months Ended March 31, 2019 2018 Net income applicable to Stifel Financial Corp. $ 99,207 $ 88,761 Preferred dividends 2,344 2,344 Net income available to common shareholders $ 96,863 $ 86,417 Shares for basic and diluted calculation: Average shares used in basic computation 71,700 71,999 Dilutive effect of stock options and units (1) 7,510 9,790 Average shares used in diluted computation 79,210 81,789 Earnings per common share: Basic $ 1.35 $ 1.20 Diluted $ 1.22 $ 1.06 (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)	Mar. 31, 2019
North Shore Aviation Holdings LLC [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	27.50%

New Accounting Pronouncements_2

New Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Mar. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Lease liabilities		$ 670,775
ASU 2017-08 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative effect on retained earnings	$ 4,400
ASU 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative effect on retained earnings	2,400
Right-of-use assets	$ 670,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Lease liabilities	$ 670,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

Receivables From And Payables_3

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Receivable From Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables from clearing organizations	$ 447,084	$ 320,277
Deposits paid for securities borrowed	115,223	109,795
Securities failed to deliver	26,194	85,502
Receivables from brokers, dealers and clearing organizations, Total	$ 588,501	$ 515,574

Receivables From And Payables_4

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Payable To Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Deposits received from securities loaned	$ 525,115	$ 392,163
Securities failed to receive	31,618	27,975
Payable to clearing organizations	30,157	12,161
Payables to broker, dealers and clearing organizations, Total	$ 586,890	$ 432,299

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 35,288	$ 36,278
Unfunded commitments	2,498	2,504
Money Market Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	20,691	19,719
Mutual Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	7,018	9,122
Private Equity Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,426	3,461
Unfunded commitments	1,480	1,480
Partnership Interests [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	4,153	3,976
Unfunded commitments	$ 1,018	$ 1,024

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	$ 1,297,491	$ 1,267,449
Available-for-sale securities	3,003,767	3,070,447
Investments	70,225	67,982
Cash equivalents measured at NAV	20,691	19,719
Derivative contracts, Assets	4,896	7,683
Total Assets	4,397,070	4,433,280
Financial instruments sold, but not yet purchased, at fair value	979,116	947,306
Sovereign Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	2,351	14,063
Financial instruments sold, but not yet purchased, at fair value	1,599	11,429
U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	117,701	72,532
Available-for-sale securities	5,368	5,215
Financial instruments sold, but not yet purchased, at fair value	49	32,755
Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	56,514	25,905
Available-for-sale securities	1,713,751	1,764,060
Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	336,317	310,457
Available-for-sale securities	947,588	931,604
Financial instruments sold, but not yet purchased, at fair value	195,642	208,725
Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	54,779	57,911
Investments	37,264	33,046
Financial instruments sold, but not yet purchased, at fair value	53,182	36,117
State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	179,626	154,622
Available-for-sale securities	49,118	68,226
Financial instruments sold, but not yet purchased, at fair value		7
Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	16,632	16,632
Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	704	704
Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,028	1,041
Investments In Funds Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	14,597	16,559
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	27,326	42,121
Financial instruments sold, but not yet purchased, at fair value	548,357	534,817
Mortgage Backed Securities [Member] | Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	514,718	564,111
Available-for-sale securities	215,417	230,408
Financial instruments sold, but not yet purchased, at fair value	180,287	123,456
Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	8,159	25,727
Available-for-sale securities	1,148	1,219
Mortgage Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	71,377	69,715
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	83,983	100,346
Available-for-sale securities	418	417
Investments	36,077	31,670
Total Assets	120,478	132,433
Financial instruments sold, but not yet purchased, at fair value	601,808	571,504
Level 1 [Member] | U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	418	417
Level 1 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,946	1,100
Financial instruments sold, but not yet purchased, at fair value	269	1,289
Level 1 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	54,711	57,125
Investments	36,077	31,670
Financial instruments sold, but not yet purchased, at fair value	53,182	35,398
Level 1 [Member] | U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	27,326	42,121
Financial instruments sold, but not yet purchased, at fair value	548,357	534,817
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,213,333	1,166,927
Available-for-sale securities	3,003,349	3,070,030
Investments	1,362	1,560
Derivative contracts, Assets	4,896	7,683
Total Assets	4,222,940	4,246,200
Financial instruments sold, but not yet purchased, at fair value	377,308	375,802
Level 2 [Member] | Sovereign Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	2,351	14,063
Financial instruments sold, but not yet purchased, at fair value	1,599	11,429
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	117,701	72,532
Available-for-sale securities	4,950	4,798
Financial instruments sold, but not yet purchased, at fair value	49	32,755
Level 2 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	56,339	25,730
Available-for-sale securities	1,713,751	1,764,060
Level 2 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	334,371	309,357
Available-for-sale securities	947,588	931,604
Financial instruments sold, but not yet purchased, at fair value	195,373	207,436
Level 2 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	68	786
Investments	1,187	1,376
Financial instruments sold, but not yet purchased, at fair value		719
Level 2 [Member] | State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	179,626	154,622
Available-for-sale securities	49,118	68,226
Financial instruments sold, but not yet purchased, at fair value		7
Level 2 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	175	184
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	514,718	564,111
Available-for-sale securities	215,417	230,408
Financial instruments sold, but not yet purchased, at fair value	180,287	123,456
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	8,159	25,726
Available-for-sale securities	1,148	1,219
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	71,377	69,715
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	175	176
Investments	18,189	18,193
Total Assets	18,364	18,369
Level 3 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	175	175
Level 3 [Member] | Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	16,632	16,632
Level 3 [Member] | Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	704	704
Level 3 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 853	857
Level 3 [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

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Non-Agency [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 1
Realized gains/(losses)	(1)
Net change	(1)
Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	175
Ending Balance	175
Equity Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	16,632
Ending Balance	16,632
Auction Rate Municipal Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	704
Ending Balance	704
Other Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	857
Redemptions	(4)
Net change	(4)
Ending Balance	$ 853

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments (Quantitative Information related To The Significant Unobservable Inputs Utilized In Company's Level 3 Recurring Fair Value Measurements) (Details) - Discounted Cash Flow [Member]	3 Months Ended
	Mar. 31, 2019
Auction Rate Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Workout period range, low end	2 years
Workout period range, high end	3 years
Discount rate, weighted average	3.20%
Weighted average workout period	2 years 4 months 24 days
Auction Rate Equity Securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	0.00%
Auction Rate Equity Securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	5.60%
Auction Rate Municipal Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Workout period range, low end	1 year
Workout period range, high end	4 years
Discount rate, weighted average	2.80%
Weighted average workout period	2 years
Auction Rate Municipal Securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	0.70%
Auction Rate Municipal Securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	8.30%

Fair Value Of Financial Instr_5

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities purchased under agreements to resell	[1]	$ 568,034	$ 699,900
Financial instruments owned		1,297,491	1,267,449
Available-for-sale securities		3,003,767	3,070,447
Held-to-maturity securities	[2]	4,056,845	4,122,907
Investments, at fair value		70,225	67,982
Derivative contracts		4,896	7,683
Securities sold under agreements to repurchase	[3]	466,284	535,394
Bank deposits		15,049,877	15,863,613
Financial instruments sold, but not yet purchased, at fair value		979,116	947,306
Borrowings		398,970	180,655
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		777,781	1,936,560
Cash segregated for regulatory purposes		73,684	132,814
Securities purchased under agreements to resell		568,034	699,900
Financial instruments owned		1,297,491	1,267,449
Available-for-sale securities		3,003,767	3,070,447
Held-to-maturity securities		4,103,562	4,218,854
Bank loans		8,706,689	8,517,615
Loans held for sale		144,216	205,557
Investments, at fair value		70,225	67,982
Derivative contracts		4,896	7,683
Securities sold under agreements to repurchase		466,284	535,394
Bank deposits		15,049,877	15,863,613
Financial instruments sold, but not yet purchased, at fair value		979,116	947,306
Federal Home Loan Bank advances		250,000	540,000
Borrowings		398,970	180,655
Senior notes		1,016,116	1,015,973
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		777,781	1,936,560
Cash segregated for regulatory purposes		73,684	132,814
Securities purchased under agreements to resell		568,034	699,900
Financial instruments owned		1,297,491	1,267,449
Available-for-sale securities		3,003,767	3,070,447
Held-to-maturity securities		4,056,845	4,122,907
Bank loans		8,782,968	8,565,347
Loans held for sale		144,216	205,557
Investments, at fair value		70,225	67,982
Derivative contracts		4,896	7,683
Securities sold under agreements to repurchase		466,284	535,394
Bank deposits		14,065,660	14,661,996
Financial instruments sold, but not yet purchased, at fair value		979,116	947,306
Federal Home Loan Bank advances		250,000	540,000
Borrowings		398,970	180,655
Senior notes		1,034,487	989,790
Debentures to Stifel Financial Capital Trusts		$ 47,513	$ 49,747
[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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, respectively.
[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.
[3]	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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, respectively.

Fair Value Of Financial Instr_6

Fair Value Of Financial Instruments (Estimated Fair Values Of Financial Instruments Not Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	[1]	$ 568,034	$ 699,900
Held-to-maturity securities	[2]	4,056,845	4,122,907
Securities sold under agreements to repurchase	[3]	466,284	535,394
Bank deposits		15,049,877	15,863,613
Borrowings		398,970	180,655
Senior notes		1,016,116	1,015,973
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		757,090	1,916,841
Cash segregated for regulatory purposes		73,684	132,814
Securities purchased under agreements to resell		568,034	699,900
Held-to-maturity securities		4,056,845	4,122,907
Bank loans		8,782,968	8,565,347
Loans held for sale		144,216	205,557
Securities sold under agreements to repurchase		466,284	535,394
Bank deposits		14,065,660	14,661,996
Federal Home Loan Bank advances		250,000	540,000
Borrowings		398,970	180,655
Senior notes		1,034,487	989,790
Debentures to Stifel Financial Capital Trusts		47,513	49,747
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		757,090	1,916,841
Cash segregated for regulatory purposes		73,684	132,814
Securities purchased under agreements to resell		552,229	645,632
Securities sold under agreements to repurchase		51,978	87,273
Federal Home Loan Bank advances		250,000	540,000
Borrowings		398,970	180,655
Senior notes		1,034,487	989,790
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		15,805	54,268
Held-to-maturity securities		3,895,569	3,960,099
Bank loans		8,782,968	8,565,347
Loans held for sale		144,216	205,557
Securities sold under agreements to repurchase		414,306	448,121
Bank deposits		14,065,660	14,661,996
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		161,276	162,808
Debentures to Stifel Financial Capital Trusts		$ 47,513	$ 49,747
[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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, respectively.
[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.
[3]	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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, 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	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	$ 1,297,491	$ 1,267,449
U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	117,701	72,532
Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	336,317	310,457
Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	54,779	57,911
State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	179,626	154,622
U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	27,326	42,121
Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	2,351	14,063
Securities Sold, But Not yet Purchased [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	979,116	947,306
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	49	32,755
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	195,642	208,725
Securities Sold, But Not yet Purchased [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	53,182	36,117
Securities Sold, But Not yet Purchased [Member] | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities		7
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	548,357	534,817
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	180,287	123,456
Securities Sold, But Not yet Purchased [Member] | Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Sovereign debt	1,599	11,429
Securities Owned
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Asset-backed securities	56,514	25,905
Financial instruments owned, at fair value	1,297,491	1,267,449
Securities Owned | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	117,701	72,532
Securities Owned | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities	336,317	310,457
Securities Owned | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	54,779	57,911
Securities Owned | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities	179,626	154,622
Securities Owned | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	27,326	42,121
Securities Owned | Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	514,718	564,111
Securities Owned | Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	8,159	25,727
Securities Owned | Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Sovereign debt	$ 2,351	$ 14,063

Financial Instruments Owned A_4

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 1,600	$ 1,900
Securities Owned
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 860.3	$ 669

Available-For-Sale And Held-T_3

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of The Available For Sale Securities And Held To Maturity Securities) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		$ 3,024,611	$ 3,125,574
Available for sale securities, unrealized gains	[1]	3,027	777
Available-for-sale Securities, Gross unrealized losses	[1]	(23,871)	(55,904)
Available-for-sale securities		3,003,767	3,070,447
Held-to-maturity Securities, Amortized cost	[2]	4,103,562	4,218,854
Held-to-maturity Securities, Gross unrealized gains	[1],[2]	8,479	6,077
Held-to-maturity Securities, Gross unrealized losses	[1],[2]	(55,196)	(102,024)
Held-to-maturity securities, Estimated fair value	[2]	4,056,845	4,122,907
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		5,367	5,237
Available for sale securities, unrealized gains	[1]	23	13
Available-for-sale Securities, Gross unrealized losses	[1]	(22)	(35)
Available-for-sale securities		5,368	5,215
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		49,011	72,487
Available for sale securities, unrealized gains	[1]	107
Available-for-sale Securities, Gross unrealized losses	[1]		(4,261)
Available-for-sale securities		49,118	68,226
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		216,959	234,292
Available for sale securities, unrealized gains	[1]	325	88
Available-for-sale Securities, Gross unrealized losses	[1]	(1,867)	(3,972)
Available-for-sale securities		215,417	230,408
Held-to-maturity Securities, Amortized cost	[2]	1,168,095	1,198,442
Held-to-maturity Securities, Gross unrealized gains	[1],[2]	4,841	1,307
Held-to-maturity Securities, Gross unrealized losses	[1],[2]	(16,346)	(31,689)
Held-to-maturity securities, Estimated fair value	[2]	1,156,590	1,168,060
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		74,117	74,411
Available for sale securities, unrealized gains	[1]	4	4
Available-for-sale Securities, Gross unrealized losses	[1]	(2,744)	(4,700)
Available-for-sale securities		71,377	69,715
Held-to-maturity Securities, Amortized cost	[2]	37,739	51,524
Held-to-maturity Securities, Gross unrealized gains	[1],[2]	336	185
Held-to-maturity securities, Estimated fair value	[2]	38,075	51,709
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		1,176	1,245
Available-for-sale Securities, Gross unrealized losses	[1]	(28)	(26)
Available-for-sale securities		1,148	1,219
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		950,997	958,406
Available for sale securities, unrealized gains	[1]	2,007
Available-for-sale Securities, Gross unrealized losses	[1]	(5,416)	(26,802)
Available-for-sale securities		947,588	931,604
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		1,726,984	1,779,496
Available for sale securities, unrealized gains	[1]	561	672
Available-for-sale Securities, Gross unrealized losses	[1]	(13,794)	(16,108)
Available-for-sale securities		1,713,751	1,764,060
Held-to-maturity Securities, Amortized cost	[2]	2,897,728	2,968,888
Held-to-maturity Securities, Gross unrealized gains	[1],[2]	3,302	4,585
Held-to-maturity Securities, Gross unrealized losses	[1],[2]	(38,850)	(70,335)
Held-to-maturity securities, Estimated fair value	[2]	$ 2,862,180	$ 2,903,138
[1]	Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_4

Available-For-Sale And Held-To-Maturity Securities (Narrative) (Details)		3 Months Ended
		Mar. 31, 2019USD ($)security	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Proceeds from sale of available-for-sale securities		$ 0	$ 0
Unrealized gains (losses) recorded in accumulated other comprehensive loss	[1],[2],[3]	25,800,000	(13,071,000)
Financial instruments pledged as collateral		$ 1,600,000,000		$ 1,900,000,000
Number of available for sale securities whose amortized costs exceeded their fair values | security		186
Available-for-sale Securities, Continuous		$ 23,871,000
Available-for-sale Securities, Continuous Unrealized		9,920,000
Available-for-sale Securities, Continuous		$ 2,042,283,000
Percentage of available-for-sale portfolio		68.00%
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security		163
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss		$ 55,196,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		23,280,000
Credit-related OTTI		0	0
Gross unrealized losses related to investment portfolio			$ 79,100,000
Pledged [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Trading securities pledged		$ 1,500,000,000		$ 1,600,000,000
[1]	Net of tax expense of $10.1 million and tax benefit of $2.3 million for the three months ended March 31, 2019 and 2018, respectively.
[2]	The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio credit risk.
[3]	There were no reclassifications to earnings during the three months ended March 31, 2019 and 2018, respectively.

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		Mar. 31, 2019	Dec. 31, 2018
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, Amortized Cost		$ 3,024,611
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	2,508
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	562,621
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,790,223
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,003,767
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		636,128
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		3,418,765
Held-to-maturity Securities, Amortized cost	[2]	4,103,562	$ 4,218,854
Held-to-maturity Securities, debt maturities, Fair Value	[2]	4,056,845	$ 4,122,907
Excluding Mortgage Backed Securities [Member]
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, within one year, Amortized Cost		2,520
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost		268,305
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost		382,387
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost		556,764
Availably-for-sale Securities, debt maturities, after ten years, Amortized Cost		1,522,383
Available-for-sale Securities, debt maturities, within one year, Fair Value		2,508
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value		265,943
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value		381,155
Available-for-sale Securities, debt maturities, after five through ten years, fair value		557,014
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		1,509,205
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		475,640
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,422,088
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value		474,910
Held-to-maturity Securities, debt maturities, after ten years, Fair Value		2,387,270
Mortgage Backed Securities [Member]
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost		195
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost		1,106
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost		5,492
Availably-for-sale Securities, debt maturities, after ten years, Amortized Cost		285,459
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value		198
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value		1,119
Available-for-sale Securities, debt maturities, after five through ten years, fair value		5,607
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		281,018
Held-to-maturity Securities, debt maturities, after one year through three years, Amortized Cost		48,669
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		160,488
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		996,677
Held-to-maturity Securities, debt maturities, after one year through three years, Fair Value		49,005
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value		159,315
Held-to-maturity Securities, debt maturities, after ten years, Fair Value		$ 986,345
[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_6

Available-For-Sale And Held-To-Maturity Securities (Contractual Maturities) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	$ 2,508
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	648,415
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	562,621
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,790,223
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,003,767
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		48,669
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		636,128
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		3,418,765
Held-to-maturity Securities, Amortized cost	[2]	4,103,562	$ 4,218,854
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]	1,910
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	3,458
Available-for-sale Securities, debt maturities, Fair Value	[1]	5,368
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]	18,171
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	30,947
Available-for-sale Securities, debt maturities, Fair Value	[1]	49,118
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]	598
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	643,640
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	303,350
Available-for-sale Securities, debt maturities, Fair Value	[1]	947,588
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]	235,493
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,478,258
Available-for-sale Securities, debt maturities, Fair Value	[1]	1,713,751
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		475,640
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,422,088
Held-to-maturity Securities, Amortized cost		2,897,728
Mortgage 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		5,607
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		281,018
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		160,488
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		996,677
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	1,317
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	5,607
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	208,493
Available-for-sale Securities, debt maturities, Fair Value	[1]	215,417
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		10,930
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		160,488
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		996,677
Held-to-maturity Securities, Amortized cost	[2]	1,168,095	1,198,442
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	71,377
Available-for-sale Securities, debt maturities, Fair Value	[1]	71,377
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		37,739
Held-to-maturity Securities, Amortized cost	[2]	37,739	$ 51,524
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,148
Available-for-sale Securities, debt maturities, Fair Value	[1]	$ 1,148
[1]	Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_7

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time In A Loss Position) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	$ (13,951)
Available-for-sale Securities, Estimated fair value, Less than 12 months	1,382,566
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(9,920)
Available-for-sale Securities, Estimated fair value, 12 months or more	659,717
Available-for-sale Securities, Gross unrealized losses, Total	(23,871)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,042,283
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(31,916)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,229,947
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(23,280)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	872,189
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(55,196)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	3,102,136
U.S. Government Agency 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	(22)
Available-for-sale Securities, Estimated fair value, Less than 12 months	3,173
Available-for-sale Securities, Gross unrealized losses, Total	(22)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	3,173
Non-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	(28)
Available-for-sale Securities, Estimated fair value, Less than 12 months	1,146
Available-for-sale Securities, Gross unrealized losses, Total	(28)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	1,146
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	(106)
Available-for-sale Securities, Estimated fair value, Less than 12 months	104,241
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(5,310)
Available-for-sale Securities, Estimated fair value, 12 months or more	505,628
Available-for-sale Securities, Gross unrealized losses, Total	(5,416)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	609,869
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	(13,794)
Available-for-sale Securities, Estimated fair value, Less than 12 months	1,273,856
Available-for-sale Securities, Gross unrealized losses, Total	(13,794)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	1,273,856
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(31,877)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,111,245
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(6,973)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	229,646
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(38,850)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,340,891
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	(1)
Available-for-sale Securities, Estimated fair value, Less than 12 months	150
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(1,866)
Available-for-sale Securities, Estimated fair value, 12 months or more	83,461
Available-for-sale Securities, Gross unrealized losses, Total	(1,867)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	83,611
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(39)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	118,702
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(16,307)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	642,543
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(16,346)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	761,245
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(2,744)
Available-for-sale Securities, Estimated fair value, 12 months or more	70,628
Available-for-sale Securities, Gross unrealized losses, Total	(2,744)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 70,628

Bank Loans (Schedule Of Balance

Bank Loans (Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 8,809,084	$ 8,581,647
Unamortized loan discount, net	(10,624)	(12,155)
Loans in process	(5,075)	27,984
Unamortized loan fees, net	1,476	5,972
Allowance for loan losses	(88,172)	(85,833)	$ (69,497)	$ (67,466)
Bank loans, net	$ 8,706,689	$ 8,517,615
Gross bank loans, Percent	100.00%	100.00%
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 3,314,564	$ 3,304,234
Allowance for loan losses	$ (68,566)	$ (68,367)	(56,433)	(54,474)
Gross bank loans, Percent	37.60%	38.50%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 2,928,228	$ 2,875,014
Allowance for loan losses	$ (11,585)	$ (11,228)	(8,779)	(8,430)
Gross bank loans, Percent	33.20%	33.50%
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 1,860,989	$ 1,786,966
Allowance for loan losses	$ (2,227)	$ (1,978)	(1,894)	(2,088)
Gross bank loans, Percent	21.10%	20.80%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 361,950	$ 318,961
Allowance for loan losses	$ (2,421)	$ (1,778)	(1,320)	(1,520)
Gross bank loans, Percent	4.10%	3.70%
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 175,023	$ 138,245
Allowance for loan losses	$ (1,724)	$ (1,241)	(199)	(100)
Gross bank loans, Percent	2.00%	1.60%
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 44,235	$ 38,098
Allowance for loan losses	$ (372)	$ (310)	(164)	(162)
Gross bank loans, Percent	0.50%	0.40%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 124,095	$ 120,129
Allowance for loan losses	$ (146)	$ (88)	$ (15)	$ (16)
Gross bank loans, Percent	1.50%	1.50%

Bank Loans (Narrative) (Details

Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 144,216		$ 205,557
Gains (losses) recognized from sale of loans	900	$ 2,500
Impaired loans more than 90 days past due	24,700		24,400
Troubled debt restructurings	9,100		9,100
Specific allowance	$ 8,725		$ 8,703
Collateralized loan portfolio	98.50%		98.40%
Stifel Financial Corp. [Member] | Executive Officers Directors and Their Affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 19,500		$ 24,800
Stifel Bancorp [Member] | Executive Officers Directors and Their Affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 3,200		$ 4,000

Bank Loans (Activity In The All

Bank Loans (Activity In The Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 85,833	$ 67,466
Provision	2,283	2,043
Charge-offs	(56)	(14)
Recoveries	112	2
Ending Balance	88,172	69,497
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	68,367	54,474
Provision	211	1,971
Charge-offs	(12)	(12)
Ending Balance	68,566	56,433
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	11,228	8,430
Provision	270	349
Recoveries	87
Ending Balance	11,585	8,779
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,978	2,088
Provision	249	(194)
Ending Balance	2,227	1,894
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,778	1,520
Provision	643	(200)
Ending Balance	2,421	1,320
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,241	100
Provision	483	99
Ending Balance	1,724	199
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	310	162
Provision	61	1
Recoveries	1	1
Ending Balance	372	164
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	88	16
Provision	78
Charge-offs	(44)	(2)
Recoveries	24	1
Ending Balance	146	15
Qualitative [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	843	676
Provision	288	17
Ending Balance	$ 1,131	$ 693

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	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 8,725	$ 8,703
Allowance for Loan Losses, Collectively Evaluated for Impairment	79,447	77,130
Allowance for Loan Losses, Total	88,172	85,833	$ 69,497	$ 67,466
Recorded Investment in Loans, Individually Evaluated for Impairment	24,653	24,401
Recorded Investment in Loans, Collectively Evaluated for Impairment	8,784,431	8,557,246
Recorded Investment in Loans, Total	8,809,084	8,581,647
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	8,677	8,678
Allowance for Loan Losses, Collectively Evaluated for Impairment	59,889	59,689
Allowance for Loan Losses, Total	68,566	68,367	56,433	54,474
Recorded Investment in Loans, Individually Evaluated for Impairment	23,654	23,677
Recorded Investment in Loans, Collectively Evaluated for Impairment	3,290,910	3,280,557
Recorded Investment in Loans, Total	3,314,564	3,304,234
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	11,561	11,204
Allowance for Loan Losses, Total	11,585	11,228	8,779	8,430
Recorded Investment in Loans, Individually Evaluated for Impairment	619	519
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,927,609	2,874,495
Recorded Investment in Loans, Total	2,928,228	2,875,014
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,227	1,978
Allowance for Loan Losses, Total	2,227	1,978	1,894	2,088
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,860,989	1,786,966
Recorded Investment in Loans, Total	1,860,989	1,786,966
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,421	1,778
Allowance for Loan Losses, Total	2,421	1,778	1,320	1,520
Recorded Investment in Loans, Collectively Evaluated for Impairment	361,950	318,961
Recorded Investment in Loans, Total	361,950	318,961
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,724	1,241
Allowance for Loan Losses, Total	1,724	1,241	199	100
Recorded Investment in Loans, Collectively Evaluated for Impairment	175,023	138,245
Recorded Investment in Loans, Total	175,023	138,245
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	372	310
Allowance for Loan Losses, Total	372	310	164	162
Recorded Investment in Loans, Individually Evaluated for Impairment	184	184
Recorded Investment in Loans, Collectively Evaluated for Impairment	44,051	37,914
Recorded Investment in Loans, Total	44,235	38,098
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	24	1
Allowance for Loan Losses, Collectively Evaluated for Impairment	122	87
Allowance for Loan Losses, Total	146	88	15	16
Recorded Investment in Loans, Individually Evaluated for Impairment	196	21
Recorded Investment in Loans, Collectively Evaluated for Impairment	123,899	120,108
Recorded Investment in Loans, Total	124,095	120,129
Qualitative [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,131	843
Allowance for Loan Losses, Total	$ 1,131	$ 843	$ 693	$ 676

Bank Loans (Loans That Were Ind

Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 24,860	$ 25,099
Recorded Investment with No Allowance	856	789
Recorded Investment with Allowance	23,797	23,612
Total Recorded Investment	24,653	24,401
Related Allowance	8,725	8,703
Average Recorded Investment	24,868	24,336
Commercial And Industrial [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	23,654	23,677
Recorded Investment with No Allowance	220	242
Recorded Investment with Allowance	23,434	23,435
Total Recorded Investment	23,654	23,677
Related Allowance	8,677	8,678
Average Recorded Investment	23,821	23,807
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	677	544
Recorded Investment with No Allowance	452	352
Recorded Investment with Allowance	167	167
Total Recorded Investment	619	519
Related Allowance	24	24
Average Recorded Investment	630	275
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	184	184
Recorded Investment with No Allowance	184	184
Total Recorded Investment	184	184
Average Recorded Investment	184	184
Other [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	345	694
Recorded Investment with No Allowance		11
Recorded Investment with Allowance	196	10
Total Recorded Investment	196	21
Related Allowance	24	1
Average Recorded Investment	$ 233	$ 70

Bank Loans (Aging Of The Record

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($)	Mar. 31, 2019		Dec. 31, 2018
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 20,925,000		$ 22,170,000
Current Balance	8,788,159,000		8,559,477,000
Recorded Investment in Loans, Total	8,809,084,000		8,581,647,000
Non-accrual	15,550,000	[1]	15,298,000	[2]
Restructured	9,103,000	[1]	9,103,000	[2]
Total	24,653,000	[1]	24,401,000	[2]
Loans past due 90 days and still accruing interest	0		0
30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,989,000		7,003,000
90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	14,936,000		15,167,000
Commercial And Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	14,644,000		14,656,000
Current Balance	3,299,920,000		3,289,578,000
Recorded Investment in Loans, Total	3,314,564,000		3,304,234,000
Non-accrual	14,718,000	[1]	14,741,000	[2]
Restructured	8,936,000	[1]	8,936,000	[2]
Total	23,654,000	[1]	23,677,000	[2]
Commercial And Industrial [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	14,644,000		14,656,000
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	6,171,000		7,347,000
Current Balance	2,922,057,000		2,867,667,000
Recorded Investment in Loans, Total	2,928,228,000		2,875,014,000
Non-accrual	452,000	[1]	352,000	[2]
Restructured	167,000	[1]	167,000	[2]
Total	619,000	[1]	519,000	[2]
Residential Real Estate [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,944,000		6,970,000
Residential Real Estate [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	227,000		377,000
Securities-Based Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance	1,860,989,000		1,786,966,000
Recorded Investment in Loans, Total	1,860,989,000		1,786,966,000
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance	361,950,000		318,961,000
Recorded Investment in Loans, Total	361,950,000		318,961,000
Construction And Land [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance	175,023,000		138,245,000
Recorded Investment in Loans, Total	175,023,000		138,245,000
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			33,000
Current Balance	44,235,000		38,065,000
Recorded Investment in Loans, Total	44,235,000		38,098,000
Non-accrual	184,000	[1]	184,000	[2]
Total	184,000	[1]	184,000	[2]
Home Equity Lines Of Credit [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			33,000
Other [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	110,000		134,000
Current Balance	123,985,000		119,995,000
Recorded Investment in Loans, Total	124,095,000		120,129,000
Non-accrual	196,000	[1]	21,000	[2]
Total	196,000	[1]	21,000	[2]
Other [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	45,000
Other [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 65,000		$ 134,000
[1]	There were no loans past due 90 days and still accruing interest at March 31, 2019.
[2]	There were no loans past due 90 days and still accruing interest at December 31, 2018.

Bank Loans (Risk Category Of Lo

Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 8,809,084	$ 8,581,647
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	8,758,602	8,531,191
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	22,503	34,991
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	27,783	15,444
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	196	21
Commercial And Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,314,564	3,304,234
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,265,303	3,254,698
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	22,281	34,795
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	26,980	14,741
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,928,228	2,875,014
Residential Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,927,609	2,874,495
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	619	519
Securities-Based Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,860,989	1,786,966
Securities-Based Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,860,989	1,786,966
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	361,950	318,961
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	361,950	318,961
Construction And Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	175,023	138,245
Construction And Land [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	175,023	138,245
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	44,235	38,098
Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	44,051	37,914
Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	184	184
Other [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	124,095	120,129
Other [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	123,677	119,912
Other [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	222	196
Other [Member] | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 196	$ 21

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	$ 1,034,679
Goodwill, Adjustments	21,432
Goodwill, Ending balance	1,056,111
Intangible assets, Beginning balance	119,655
Intangible assets, Net Additions	7,768
Intangible assets, Amortization	(3,593)	$ (2,738)
Intangible assets, Ending balance	123,830
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	340,395
Goodwill, Adjustments	6,998
Goodwill, Ending balance	347,393
Intangible assets, Beginning balance	60,532
Intangible assets, Amortization	(1,847)
Intangible assets, Ending balance	58,685
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	694,284
Goodwill, Adjustments	14,434
Goodwill, Ending balance	708,718
Intangible assets, Beginning balance	59,123
Intangible assets, Net Additions	7,768
Intangible assets, Amortization	(1,746)
Intangible assets, Ending balance	$ 65,145

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 02, 2019	Dec. 31, 2018
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill	$ 1,056,111			$ 1,034,679
Amortization of intangible assets	$ 3,593	$ 2,738
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	10 years
Trade Name [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	9 years 4 months 24 days
Core Deposits [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	4 years 9 months 18 days
Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	9 years 7 months 6 days
First Empire [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill			$ 22,100
Weighted-average remaining lives of intangible assets	14 years 9 months 18 days

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 208,124	$ 200,225
Accumulated Amortization	84,294	80,570
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	160,819	160,745
Accumulated Amortization	67,661	65,254
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	26,831	26,831
Accumulated Amortization	12,136	11,755
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,615	8,615
Accumulated Amortization	1,384	816
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2,714	2,603
Accumulated Amortization	1,674	1,452
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,445	1,431
Accumulated Amortization	1,311	$ 1,293
First Empire [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	7,700
Accumulated Amortization	$ 128

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Amortization Expense In Future Periods) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2019	$ 10,577
2020	13,586
2021	12,732
2022	11,916
2023	11,249
Thereafter	61,652
Future amortization expense total	$ 121,712

Borrowings and Federal Home L_2

Borrowings and Federal Home Loan Bank Advances (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019USD ($)item
Short-term Debt [Line Items]
Uncommitted secured lines of credit	$ 1,000,000,000
Number of banks | item	5
Daily borrowings under our uncommitted secured lines	$ 276,000,000
Compensating balances	0
Federal home loan advances, floating-rate	$ 250,000,000
Stifel Bancorp [Member]
Short-term Debt [Line Items]
Notes maturity year	2043
Notes payable	$ 122,800,000
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	$ 200,000,000
Credit facility expiration date	2024-03
LIBOR rate	2.00%
Outstanding credit facility	$ 0
Stifel Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	$ 250,000,000
Credit facility expiration date	2019-06
Outstanding credit facility	$ 0
Credit agreement maturity days	364 days
Company Owned Securities [Member]
Short-term Debt [Line Items]
Uncommitted secured lines of credit	$ 276,000,000
Trading securities pledged	$ 309,700,000
Federal Home Loan Bank advances [Member]
Short-term Debt [Line Items]
Weighted average interest rate on borrowings	1.45%

Senior Notes (Summary of Senior

Senior Notes (Summary of Senior Notes) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018	Oct. 31, 2017	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, gross		$ 1,025,000	$ 1,025,000
Debt issuance costs, net		(8,884)	(9,027)
Senior notes, net		1,016,116	1,015,973
Senior notes 4.250% 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
[1]	In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.250% senior notes due July 2024. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. In July 2016, we issued an additional $200.0 million in aggregate principal amount of 4.25% senior notes due 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. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption.
[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. Interest on the senior notes is payable quarterly in arrears on January 15, April 15, July 15, and October 15. On or after October 15, 2022, we may redeem some or all of the senior notes at any time at a redemption price equal to 100% of the principal amount of the notes being redeemed plus accrued interest thereon to the redemption date. On October 27, 2017, we completed the sale of an additional $25.0 million aggregate principal amount of Notes pursuant to the over-allotment option.

Senior Notes (Summary of Seni_2

Senior Notes (Summary of Senior Notes) (Parenthetical) (Details) - USD ($) $ in Thousands	Oct. 27, 2017	Jul. 31, 2016	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Oct. 31, 2017	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Senior notes			$ 1,016,116		$ 1,015,973
Senior notes 4.250% due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate			4.25%					4.25%
Senior notes								$ 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%				3.50%
Senior notes							$ 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%			5.20%
Senior notes						$ 200,000
Debt instrument, maturity date			Oct. 31, 2047
Redemption price, percentage of principal amount			100.00%
Additional issuance of long-term debt	$ 25,000

Senior Notes (Schedule Of Corpo

Senior Notes (Schedule Of Corporate Debt Principal Maturities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Senior notes, net	$ 1,016,116	$ 1,015,973
Non Recourse Debt [Member]
Debt Instrument [Line Items]
2020	300,000
Thereafter	725,000
Senior notes, net	$ 1,025,000

Bank Deposits (Schedule Of Depo

Bank Deposits (Schedule Of Deposits) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Money market and savings accounts	$ 13,354,624	$ 13,609,612
Certificates of deposit	1,174,386	1,763,336
Demand deposits (interest-bearing)	420,712	392,765
Demand deposits (non-interest-bearing)	100,155	97,900
Bank deposits	$ 15,049,877	$ 15,863,613

Bank Deposits (Narrative) (Deta

Bank Deposits (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Bank Deposits [Line Items]
Weighted average interest rate on deposits	0.73%	0.60%
Brokerage Customers Deposits [Member]
Bank Deposits [Line Items]
Deposits of related parties	$ 14,100	$ 15,200
Stifel Nicolaus [Member]
Bank Deposits [Line Items]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 7	$ 6.5

Bank Deposits (Scheduled Maturi

Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 4,974	$ 4,858
One to three years	480	623
Three to five years	81	140
Certificates of deposit, less than $100,000	5,535	5,621
Within one year	1,002,302	1,535,784
One to three years	142,802	195,159
Three to five years	23,747	26,772
Certificates of deposit, $100,000 and greater	1,168,851	1,757,715
Total certificates of deposit	$ 1,174,386	$ 1,763,336

Derivative Instruments And He_3

Derivative Instruments And Hedging Activities (Schedule Of Notional Values And Fair Values Of Derivative Instruments Designated As Hedging Instruments) (Details) - Cash Flow Interest Rate Contracts [Member] - Designated As Hedging Instrument [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative Assets, Notional Value	$ 250,000,000	$ 540,000,000
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 4,896,000	$ 7,683,000

Derivative Instruments And He_4

Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Average remaining life of interest rate swap agreements	1 year 9 months 18 days
Estimated derivatives to be reclassified as interest income	$ 2.7

Derivative Instruments And He_5

Derivative Instruments And Hedging Activities (Schedule Of Derivative Instruments In Consolidated Statements Of Operations) (Details) - Cash Flow Interest Rate Contracts [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI	$ 925	$ (3,818)
Gain Reclassified From OCI Into Income	$ 1,542	$ 533

Disclosures About Offsetting _3

Disclosures About Offsetting Assets And Liabilities (Financial Assets And Derivative Assets That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Offsetting [Abstract]
Gross amounts of recognized assets, Securities borrowing	[1]	$ 115,223	$ 109,795
Net amounts presented in the Statement of Financial Condition, Securities borrowing	[1]	115,223	109,795
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities borrowing	[1]	(64,520)	(57,328)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities borrowing	[1]	(47,133)	(45,005)
Securities borrowed, Net amount	[1]	3,570	7,462
Gross amounts of recognized assets, Reverse repurchase agreements	[2]	568,034	699,900
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	568,034	699,900
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	(28,740)	(365,822)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities purchased under agreements to resell	[2]	(539,121)	(329,740)
Securities purchased under agreements to resell, Net amount	[2]	173	4,338
Gross amounts of recognized assets, Cash flow interest rate contracts		4,896	7,683
Net amounts presented in the Statement of Financial Condition, Cash flow interest rate contracts		4,896	7,683
Cash flow interest rate contracts, Net amount		4,896	7,683
Gross amounts of recognized assets		688,153	817,378
Net amounts presented in the Statements of Financial Condition		688,153	817,378
Gross amounts not offset in the Statement of Financial Position		(93,260)	(423,150)
Gross amounts not offset in the Statement of Financial Position, Collateral received		(586,254)	(374,745)
Net amount		$ 8,639	$ 19,483
[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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, 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		Mar. 31, 2019	Dec. 31, 2018
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral	[1]	$ 539,121	$ 329,740
Fair Value Of Securities Pledged As Collateral [Member]
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral		$ 568,100	$ 695,600
[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 $568.1 million and $695.6 million at March 31, 2019 and December 31, 2018, respectively.

Disclosures About Offsetting _5

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Offsetting [Abstract]
Gross amounts of recognized liabilities, Securities lending	[1]	$ (525,115)	$ (392,163)
Net amounts presented in the Statement of Financial Condition, Securities lending	[1]	(525,115)	(392,163)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending	[1]	64,520	57,328
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending	[1]	460,594	325,110
Securities lending, Net amount	[1]	(1)	(9,725)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell	[2]	(466,284)	(535,394)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	(466,284)	(535,394)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	28,740	365,822
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell	[2]	437,544	169,572
Gross amounts of recognized liabilities		(991,399)	(927,557)
Net amounts presented in the Statement of Financial Condition		(991,399)	(927,557)
Gross amounts not offset in the Statement of Financial Position, Financial instruments		93,260	423,150
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged		898,138	494,682
Net amount		$ (1)	$ (9,725)
[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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, respectively.

Disclosures About Offsetting _6

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities That Are Subject To Offset) (Details) (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party	[1]	$ 437,544	$ 169,572
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		$ 495,000	$ 558,600
[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 $495.0 million and $558.6 million at March 31, 2019 and December 31, 2018, respectively.

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Narrative) (Details) $ in Millions	Mar. 31, 2019USD ($)
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	22.50%
Net capital	$ 371.5
Excess of minimum required net capital	338.4
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Net capital under the alternative method	$ 1
Aggregate debit balances	2.00%

Regulatory Capital Requiremen_4

Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 2,256,249
Tier 1 capital, Actual Ratio	18.50%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 732,900
Tier 1 capital For Capital Adequacy Purposes, Ratio	6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 977,200
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%
Total capital, Actual Amount	$ 2,403,426
Total capital, Actual Ratio	19.70%
Total capital For Capital Adequacy Purposes, Amount	$ 977,200
Total capital For Capital Adequacy Purposes, Ratio	8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,221,500
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 2,256,249
Tier 1 leverage, Actual Ratio	9.80%
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 919,050
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,148,812
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
Stifel Financial Corp. [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,942,586
Tier 1 capital, Actual Ratio	15.90%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 549,675
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 793,975
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%
Stifel Bank & Trust [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,109,109
Tier 1 capital, Actual Ratio	13.80%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 482,663
Tier 1 capital For Capital Adequacy Purposes, Ratio	6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 643,551
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%
Total capital, Actual Amount	$ 1,197,212
Total capital, Actual Ratio	14.90%
Total capital For Capital Adequacy Purposes, Amount	$ 643,551
Total capital For Capital Adequacy Purposes, Ratio	8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 804,439
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 1,109,109
Tier 1 leverage, Actual Ratio	7.10%
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 624,945
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 781,182
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
Stifel Bank & Trust [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,105,446
Tier 1 capital, Actual Ratio	13.70%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 361,998
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 522,885
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%
Stifel Bank [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 135,189
Tier 1 capital, Actual Ratio	17.50%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 46,338
Tier 1 capital For Capital Adequacy Purposes, Ratio	6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 61,784
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%
Total capital, Actual Amount	$ 143,745
Total capital, Actual Ratio	18.60%
Total capital For Capital Adequacy Purposes, Amount	$ 61,784
Total capital For Capital Adequacy Purposes, Ratio	8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 77,230
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 135,189
Tier 1 leverage, Actual Ratio	7.50%
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 72,561
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 90,702
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
Stifel Bank [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 135,189
Tier 1 capital, Actual Ratio	17.50%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 34,754
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 50,200
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%

Operating Leases - Schedule of

Operating Leases - Schedule of Information About Operating Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
Lessee Disclosure [Abstract]
Remainder of 2019	$ 65,058
2020	84,120
2021	79,102
2022	78,288
2023	76,386
Thereafter	485,856
Total undiscounted lease payments	868,810
Imputed interest	(198,035)
Total operating lease liabilities	$ 670,775
Weighted average remaining lease term	11 years 10 months 24 days
Weighted average discount rate	4.58%

Operating Leases (Narrative) (D

Operating Leases (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)AircraftEngine	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Lessee Lease Description [Line Items]
Operating lease costs	$ 21,000	$ 21,900
Number of aircraft engines | AircraftEngine	29
Net book value of aircraft engines	$ 1,077,891		$ 372,939
Lease income	$ 8,200
Operating Lease, Income, Comprehensive Income [Extensible List]	us-gaap:OtherIncomeMember
Aircraft Engines [Member]
Lessee Lease Description [Line Items]
Net book value of aircraft engines	$ 286,000

Operating Leases - Summary of M

Operating Leases - Summary of Minimum Future Payments Uder Non-cancelable Leases (Details) $ in Thousands	Mar. 31, 2019USD ($)
Lessee Lease Description [Line Items]
Remainder of 2019	$ 65,058
2020	84,120
2021	79,102
2022	78,288
2023	76,386
Thereafter	485,856
Total undiscounted lease payments	868,810
Non-cancelable Leases [Member]
Lessee Lease Description [Line Items]
Remainder of 2019	25,478
2020	22,099
2021	18,012
2022	10,004
2023	4,889
Thereafter	10,420
Total undiscounted lease payments	$ 90,902

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
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Revenue from contracts with customers	$ 516,338	$ 541,656
Other	3,782	3,718
Total revenue from contracts with customers	516,338	541,656
Other sources of revenue:
Interest	191,071	137,734
Principal transactions	104,032	97,782
Other	8,427	(361)
Total revenues	819,868	776,811
Commissions [Member]
Revenues
Revenue from contracts with customers	155,449	165,775
Investment Banking [Member]
Revenues
Revenue from contracts with customers	161,840	176,362
Asset Management and Service Fees [Member]
Revenues
Revenue from contracts with customers	$ 195,267	$ 195,801

Revenues from Contracts with _4

Revenues from Contracts with Customers (Revenues from Contracts with Customers Disaggregated by Major Business Activity and Primary Geographic Regions) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Commissions		$ 155,449	$ 165,775
Investment banking		161,840	176,362
Revenue from contracts with customers		516,338	541,656
Other		3,782	3,718
Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	56,945	78,689
Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	104,895	97,673
Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		195,267	195,801
Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Commissions		109,927	119,205
Investment banking		8,223	7,688
Revenue from contracts with customers		315,858	325,368
Other		2,455	2,686
Global Wealth Management [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	8,223	7,688
Global Wealth Management [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		195,253	195,789
Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Commissions		45,522	46,570
Investment banking		153,617	168,674
Revenue from contracts with customers		199,153	215,256
Institutional Group [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	48,722	71,001
Institutional Group [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	[1]	104,895	97,673
Institutional Group [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		14	12
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		1,327	1,032
Other		1,327	1,032
United States [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		493,925	502,750
United States [Member] | Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		315,858	325,368
United States [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		176,740	176,350
United States [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		1,327	1,032
United Kingdom [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		21,103	37,879
United Kingdom [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		21,103	37,879
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		1,310	1,027
Other [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers		$ 1,310	$ 1,027
[1]	Excludes revenues not derived from contracts with customers included in the Other segment.

Revenues from Contracts with _5

Revenues from Contracts with Customers (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Receivables related to contract with customers	$ 137,200,000	$ 116,700,000
Impairment related to receivables	0
Deferred Revenue	$ 17,600,000	$ 11,100,000

Interest Income and Interest _3

Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest Income Expense Net [Abstract]
Bank loans, net	$ 93,224	$ 63,635
Investment securities	65,466	54,903
Margin balances	13,440	10,950
Financial instruments owned	6,313	4,929
Other	12,628	3,317
Total interest income	191,071	137,734
Bank deposits	28,066	8,130
Senior notes	11,122	11,118
Federal Home Loan Bank advances	1,678	3,252
Other	8,582	3,953
Total interest expense	$ 49,448	$ 26,453

Employee Incentive, Deferred _2

Employee Incentive, Deferred Compensation, And Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to grant	3,800,000
Stock-based compensation	$ 32,119	$ 27,072
Contributions to the Profit Sharing Plan	3,400	400
Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 29,700	$ 23,900
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	15,400,000
Unvested stock awards outstanding	13,300,000
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	$ 485,400
Weighted-average period, compensation cost expected to recognized, in years	2 years 10 months 24 days
SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Elective deferrals vested percentage	100.00%
Percentage of earnings deferred into company stock units	5.00%
Percentage of earnings deferred into company stock units, Company match	25.00%
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 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] | Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	1 year
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 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] | Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	5 years
Maximum [Member] | SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	10 years

Off-Balance Sheet Credit Risk (

Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
General settlement period of securities transactions	2 days
Fair value of securities accepted as collateral permitted to sell or repledge	$ 2,500	$ 2,400
Fair value of collateral securities sold or repledged	466.3	535.4
Outstanding commitments to originate loans	245.9	146.7
Letters of credit outstanding	26.2	26.3
Unused Lines Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unused lines of credit to commercial and consumer borrowers	$ 955.5	$ 919.5
Standby Letters of Credit [Member] | Maximum [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit, expiration period	1 year

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019Segment
Segment Reporting Information [Line Items]
Number of business segments	3
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Number of businesses within operating segment	2

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 770,420	$ 750,358
Income/(loss) before income taxes		137,809	119,554
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	510,610	485,575
Income/(loss) before income taxes		194,490	176,771
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	261,286	270,078
Income/(loss) before income taxes		32,204	44,570
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	(1,476)	(5,295)
Income/(loss) before income taxes		$ (88,885)	$ (101,787)
[1]	No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2019 or 2018.

Segment Reporting (Schedule O_2

Segment Reporting (Schedule Of Operating Information, Segment) (Parenthetical) (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting [Abstract]
Net revenues accounted for by individual client, maximum percentage	10.00%	10.00%

Segment Reporting (Schedule O_3

Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total assets	$ 24,183,559	$ 24,519,598
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	20,350,939	21,040,224
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	3,567,420	3,238,617
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 265,200	$ 240,757

Segment Reporting (Schedule O_4

Segment Reporting (Schedule Of Net Revenues Earned On Major Geographical Areas) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total net revenues	[1]	$ 770,420	$ 750,358
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues		741,230	706,068
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues		26,390	41,558
Other [Member]
Segment Reporting Information [Line Items]
Total net revenues		$ 2,800	$ 2,732
[1]	No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2019 or 2018.

Earnings Per Share (Computation

Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 99,207	$ 88,761
Preferred dividends	2,344	2,344
Net income available to common shareholders	$ 96,863	$ 86,417
Average shares used in basic computation	71,700	71,999
Dilutive effect of stock options and units	7,510	9,790
Average shares used in diluted computation	79,210	81,789
Basic	$ 1.35	$ 1.20
Diluted	$ 1.22	$ 1.06

Earnings Per Share (Details)

Earnings Per Share (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Cash dividends declared per common share	$ 0.15	$ 0.12
Cash dividend paid per common share	$ 0.15	$ 0.12

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 21, 2019	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to be repurchased		8,000,000	8,000,000
Purchase of treasury stock			$ 53.9	$ 2.8
Treasury Stock Acquired, Average Cost Per Share			$ 53.25	$ 56.78
Shares issued			1,200,000
Preferred stock, par value		$ 1	$ 1	$ 1	$ 1
Non-Cumulative Perpetual Preferred Stock, Series B [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock	$ 150
Preferred stock, dividend rate percentage	6.25%
Preferred stock, par value	$ 1
Preferred stock liquidation preference per depositary share	25
Preferred stock, liquidation preference per share	$ 25,000
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 or following a regulatory capital treatment event, as defined
Series B Preferred Stock [Member] | Over-Allotment Option [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock		$ 10

Variable Interest Entities (Det

Variable Interest Entities (Details) $ in Millions	Jul. 31, 2018Air_craft	Mar. 31, 2019USD ($)
Variable Interest Entity [Line Items]
Assets in partnership		$ 233.1
Jet Holding S.a.r.l. [Member]
Variable Interest Entity [Line Items]
Ownreship interest	100.00%
Weisel Capital Management LLC [Member]
Variable Interest Entity [Line Items]
Assets in partnership		$ 227
FAN Engine Securitization Ltd [Member]
Variable Interest Entity [Line Items]
Number of Aircraft engines | Air_craft	24
FAN Engine Securitization Ltd [Member] | Jet Holding S.a.r.l. [Member]
Variable Interest Entity [Line Items]
Ownreship interest	100.00%

Subsequent Events (Details)

Subsequent Events (Details)	3 Months Ended
	Mar. 31, 2019item
Subsequent Events [Abstract]
Number of types of subsequent events	2